| /* |
| * Copyright (c) 2006-2008 Intel Corporation |
| * Copyright (c) 2007 Dave Airlie <airlied@linux.ie> |
| * Copyright (c) 2008 Red Hat Inc. |
| * |
| * DRM core CRTC related functions |
| * |
| * Permission to use, copy, modify, distribute, and sell this software and its |
| * documentation for any purpose is hereby granted without fee, provided that |
| * the above copyright notice appear in all copies and that both that copyright |
| * notice and this permission notice appear in supporting documentation, and |
| * that the name of the copyright holders not be used in advertising or |
| * publicity pertaining to distribution of the software without specific, |
| * written prior permission. The copyright holders make no representations |
| * about the suitability of this software for any purpose. It is provided "as |
| * is" without express or implied warranty. |
| * |
| * THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, |
| * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO |
| * EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY SPECIAL, INDIRECT OR |
| * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, |
| * DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER |
| * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE |
| * OF THIS SOFTWARE. |
| * |
| * Authors: |
| * Keith Packard |
| * Eric Anholt <eric@anholt.net> |
| * Dave Airlie <airlied@linux.ie> |
| * Jesse Barnes <jesse.barnes@intel.com> |
| */ |
| #include <linux/ctype.h> |
| #include <linux/list.h> |
| #include <linux/slab.h> |
| #include <linux/export.h> |
| #include <drm/drmP.h> |
| #include <drm/drm_crtc.h> |
| #include <drm/drm_edid.h> |
| #include <drm/drm_fourcc.h> |
| #include <drm/drm_modeset_lock.h> |
| #include <drm/drm_atomic.h> |
| |
| #include "drm_crtc_internal.h" |
| #include "drm_internal.h" |
| |
| static struct drm_framebuffer *add_framebuffer_internal(struct drm_device *dev, |
| struct drm_mode_fb_cmd2 *r, |
| struct drm_file *file_priv); |
| |
| /* Avoid boilerplate. I'm tired of typing. */ |
| #define DRM_ENUM_NAME_FN(fnname, list) \ |
| const char *fnname(int val) \ |
| { \ |
| int i; \ |
| for (i = 0; i < ARRAY_SIZE(list); i++) { \ |
| if (list[i].type == val) \ |
| return list[i].name; \ |
| } \ |
| return "(unknown)"; \ |
| } |
| |
| /* |
| * Global properties |
| */ |
| static const struct drm_prop_enum_list drm_dpms_enum_list[] = { |
| { DRM_MODE_DPMS_ON, "On" }, |
| { DRM_MODE_DPMS_STANDBY, "Standby" }, |
| { DRM_MODE_DPMS_SUSPEND, "Suspend" }, |
| { DRM_MODE_DPMS_OFF, "Off" } |
| }; |
| |
| DRM_ENUM_NAME_FN(drm_get_dpms_name, drm_dpms_enum_list) |
| |
| static const struct drm_prop_enum_list drm_plane_type_enum_list[] = { |
| { DRM_PLANE_TYPE_OVERLAY, "Overlay" }, |
| { DRM_PLANE_TYPE_PRIMARY, "Primary" }, |
| { DRM_PLANE_TYPE_CURSOR, "Cursor" }, |
| }; |
| |
| /* |
| * Optional properties |
| */ |
| static const struct drm_prop_enum_list drm_scaling_mode_enum_list[] = { |
| { DRM_MODE_SCALE_NONE, "None" }, |
| { DRM_MODE_SCALE_FULLSCREEN, "Full" }, |
| { DRM_MODE_SCALE_CENTER, "Center" }, |
| { DRM_MODE_SCALE_ASPECT, "Full aspect" }, |
| }; |
| |
| static const struct drm_prop_enum_list drm_aspect_ratio_enum_list[] = { |
| { DRM_MODE_PICTURE_ASPECT_NONE, "Automatic" }, |
| { DRM_MODE_PICTURE_ASPECT_4_3, "4:3" }, |
| { DRM_MODE_PICTURE_ASPECT_16_9, "16:9" }, |
| }; |
| |
| /* |
| * Non-global properties, but "required" for certain connectors. |
| */ |
| static const struct drm_prop_enum_list drm_dvi_i_select_enum_list[] = { |
| { DRM_MODE_SUBCONNECTOR_Automatic, "Automatic" }, /* DVI-I and TV-out */ |
| { DRM_MODE_SUBCONNECTOR_DVID, "DVI-D" }, /* DVI-I */ |
| { DRM_MODE_SUBCONNECTOR_DVIA, "DVI-A" }, /* DVI-I */ |
| }; |
| |
| DRM_ENUM_NAME_FN(drm_get_dvi_i_select_name, drm_dvi_i_select_enum_list) |
| |
| static const struct drm_prop_enum_list drm_dvi_i_subconnector_enum_list[] = { |
| { DRM_MODE_SUBCONNECTOR_Unknown, "Unknown" }, /* DVI-I and TV-out */ |
| { DRM_MODE_SUBCONNECTOR_DVID, "DVI-D" }, /* DVI-I */ |
| { DRM_MODE_SUBCONNECTOR_DVIA, "DVI-A" }, /* DVI-I */ |
| }; |
| |
| DRM_ENUM_NAME_FN(drm_get_dvi_i_subconnector_name, |
| drm_dvi_i_subconnector_enum_list) |
| |
| static const struct drm_prop_enum_list drm_tv_select_enum_list[] = { |
| { DRM_MODE_SUBCONNECTOR_Automatic, "Automatic" }, /* DVI-I and TV-out */ |
| { DRM_MODE_SUBCONNECTOR_Composite, "Composite" }, /* TV-out */ |
| { DRM_MODE_SUBCONNECTOR_SVIDEO, "SVIDEO" }, /* TV-out */ |
| { DRM_MODE_SUBCONNECTOR_Component, "Component" }, /* TV-out */ |
| { DRM_MODE_SUBCONNECTOR_SCART, "SCART" }, /* TV-out */ |
| }; |
| |
| DRM_ENUM_NAME_FN(drm_get_tv_select_name, drm_tv_select_enum_list) |
| |
| static const struct drm_prop_enum_list drm_tv_subconnector_enum_list[] = { |
| { DRM_MODE_SUBCONNECTOR_Unknown, "Unknown" }, /* DVI-I and TV-out */ |
| { DRM_MODE_SUBCONNECTOR_Composite, "Composite" }, /* TV-out */ |
| { DRM_MODE_SUBCONNECTOR_SVIDEO, "SVIDEO" }, /* TV-out */ |
| { DRM_MODE_SUBCONNECTOR_Component, "Component" }, /* TV-out */ |
| { DRM_MODE_SUBCONNECTOR_SCART, "SCART" }, /* TV-out */ |
| }; |
| |
| DRM_ENUM_NAME_FN(drm_get_tv_subconnector_name, |
| drm_tv_subconnector_enum_list) |
| |
| static const struct drm_prop_enum_list drm_dirty_info_enum_list[] = { |
| { DRM_MODE_DIRTY_OFF, "Off" }, |
| { DRM_MODE_DIRTY_ON, "On" }, |
| { DRM_MODE_DIRTY_ANNOTATE, "Annotate" }, |
| }; |
| |
| struct drm_conn_prop_enum_list { |
| int type; |
| const char *name; |
| struct ida ida; |
| }; |
| |
| /* |
| * Connector and encoder types. |
| */ |
| static struct drm_conn_prop_enum_list drm_connector_enum_list[] = { |
| { DRM_MODE_CONNECTOR_Unknown, "Unknown" }, |
| { DRM_MODE_CONNECTOR_VGA, "VGA" }, |
| { DRM_MODE_CONNECTOR_DVII, "DVI-I" }, |
| { DRM_MODE_CONNECTOR_DVID, "DVI-D" }, |
| { DRM_MODE_CONNECTOR_DVIA, "DVI-A" }, |
| { DRM_MODE_CONNECTOR_Composite, "Composite" }, |
| { DRM_MODE_CONNECTOR_SVIDEO, "SVIDEO" }, |
| { DRM_MODE_CONNECTOR_LVDS, "LVDS" }, |
| { DRM_MODE_CONNECTOR_Component, "Component" }, |
| { DRM_MODE_CONNECTOR_9PinDIN, "DIN" }, |
| { DRM_MODE_CONNECTOR_DisplayPort, "DP" }, |
| { DRM_MODE_CONNECTOR_HDMIA, "HDMI-A" }, |
| { DRM_MODE_CONNECTOR_HDMIB, "HDMI-B" }, |
| { DRM_MODE_CONNECTOR_TV, "TV" }, |
| { DRM_MODE_CONNECTOR_eDP, "eDP" }, |
| { DRM_MODE_CONNECTOR_VIRTUAL, "Virtual" }, |
| { DRM_MODE_CONNECTOR_DSI, "DSI" }, |
| }; |
| |
| static const struct drm_prop_enum_list drm_encoder_enum_list[] = { |
| { DRM_MODE_ENCODER_NONE, "None" }, |
| { DRM_MODE_ENCODER_DAC, "DAC" }, |
| { DRM_MODE_ENCODER_TMDS, "TMDS" }, |
| { DRM_MODE_ENCODER_LVDS, "LVDS" }, |
| { DRM_MODE_ENCODER_TVDAC, "TV" }, |
| { DRM_MODE_ENCODER_VIRTUAL, "Virtual" }, |
| { DRM_MODE_ENCODER_DSI, "DSI" }, |
| { DRM_MODE_ENCODER_DPMST, "DP MST" }, |
| }; |
| |
| static const struct drm_prop_enum_list drm_subpixel_enum_list[] = { |
| { SubPixelUnknown, "Unknown" }, |
| { SubPixelHorizontalRGB, "Horizontal RGB" }, |
| { SubPixelHorizontalBGR, "Horizontal BGR" }, |
| { SubPixelVerticalRGB, "Vertical RGB" }, |
| { SubPixelVerticalBGR, "Vertical BGR" }, |
| { SubPixelNone, "None" }, |
| }; |
| |
| void drm_connector_ida_init(void) |
| { |
| int i; |
| |
| for (i = 0; i < ARRAY_SIZE(drm_connector_enum_list); i++) |
| ida_init(&drm_connector_enum_list[i].ida); |
| } |
| |
| void drm_connector_ida_destroy(void) |
| { |
| int i; |
| |
| for (i = 0; i < ARRAY_SIZE(drm_connector_enum_list); i++) |
| ida_destroy(&drm_connector_enum_list[i].ida); |
| } |
| |
| /** |
| * drm_get_connector_status_name - return a string for connector status |
| * @status: connector status to compute name of |
| * |
| * In contrast to the other drm_get_*_name functions this one here returns a |
| * const pointer and hence is threadsafe. |
| */ |
| const char *drm_get_connector_status_name(enum drm_connector_status status) |
| { |
| if (status == connector_status_connected) |
| return "connected"; |
| else if (status == connector_status_disconnected) |
| return "disconnected"; |
| else |
| return "unknown"; |
| } |
| EXPORT_SYMBOL(drm_get_connector_status_name); |
| |
| /** |
| * drm_get_subpixel_order_name - return a string for a given subpixel enum |
| * @order: enum of subpixel_order |
| * |
| * Note you could abuse this and return something out of bounds, but that |
| * would be a caller error. No unscrubbed user data should make it here. |
| */ |
| const char *drm_get_subpixel_order_name(enum subpixel_order order) |
| { |
| return drm_subpixel_enum_list[order].name; |
| } |
| EXPORT_SYMBOL(drm_get_subpixel_order_name); |
| |
| static char printable_char(int c) |
| { |
| return isascii(c) && isprint(c) ? c : '?'; |
| } |
| |
| /** |
| * drm_get_format_name - return a string for drm fourcc format |
| * @format: format to compute name of |
| * |
| * Note that the buffer used by this function is globally shared and owned by |
| * the function itself. |
| * |
| * FIXME: This isn't really multithreading safe. |
| */ |
| const char *drm_get_format_name(uint32_t format) |
| { |
| static char buf[32]; |
| |
| snprintf(buf, sizeof(buf), |
| "%c%c%c%c %s-endian (0x%08x)", |
| printable_char(format & 0xff), |
| printable_char((format >> 8) & 0xff), |
| printable_char((format >> 16) & 0xff), |
| printable_char((format >> 24) & 0x7f), |
| format & DRM_FORMAT_BIG_ENDIAN ? "big" : "little", |
| format); |
| |
| return buf; |
| } |
| EXPORT_SYMBOL(drm_get_format_name); |
| |
| /* |
| * Internal function to assign a slot in the object idr and optionally |
| * register the object into the idr. |
| */ |
| static int drm_mode_object_get_reg(struct drm_device *dev, |
| struct drm_mode_object *obj, |
| uint32_t obj_type, |
| bool register_obj) |
| { |
| int ret; |
| |
| mutex_lock(&dev->mode_config.idr_mutex); |
| ret = idr_alloc(&dev->mode_config.crtc_idr, register_obj ? obj : NULL, 1, 0, GFP_KERNEL); |
| if (ret >= 0) { |
| /* |
| * Set up the object linking under the protection of the idr |
| * lock so that other users can't see inconsistent state. |
| */ |
| obj->id = ret; |
| obj->type = obj_type; |
| } |
| mutex_unlock(&dev->mode_config.idr_mutex); |
| |
| return ret < 0 ? ret : 0; |
| } |
| |
| /** |
| * drm_mode_object_get - allocate a new modeset identifier |
| * @dev: DRM device |
| * @obj: object pointer, used to generate unique ID |
| * @obj_type: object type |
| * |
| * Create a unique identifier based on @ptr in @dev's identifier space. Used |
| * for tracking modes, CRTCs and connectors. Note that despite the _get postfix |
| * modeset identifiers are _not_ reference counted. Hence don't use this for |
| * reference counted modeset objects like framebuffers. |
| * |
| * Returns: |
| * New unique (relative to other objects in @dev) integer identifier for the |
| * object. |
| */ |
| int drm_mode_object_get(struct drm_device *dev, |
| struct drm_mode_object *obj, uint32_t obj_type) |
| { |
| return drm_mode_object_get_reg(dev, obj, obj_type, true); |
| } |
| |
| static void drm_mode_object_register(struct drm_device *dev, |
| struct drm_mode_object *obj) |
| { |
| mutex_lock(&dev->mode_config.idr_mutex); |
| idr_replace(&dev->mode_config.crtc_idr, obj, obj->id); |
| mutex_unlock(&dev->mode_config.idr_mutex); |
| } |
| |
| /** |
| * drm_mode_object_put - free a modeset identifer |
| * @dev: DRM device |
| * @object: object to free |
| * |
| * Free @id from @dev's unique identifier pool. Note that despite the _get |
| * postfix modeset identifiers are _not_ reference counted. Hence don't use this |
| * for reference counted modeset objects like framebuffers. |
| */ |
| void drm_mode_object_put(struct drm_device *dev, |
| struct drm_mode_object *object) |
| { |
| mutex_lock(&dev->mode_config.idr_mutex); |
| idr_remove(&dev->mode_config.crtc_idr, object->id); |
| mutex_unlock(&dev->mode_config.idr_mutex); |
| } |
| |
| static struct drm_mode_object *_object_find(struct drm_device *dev, |
| uint32_t id, uint32_t type) |
| { |
| struct drm_mode_object *obj = NULL; |
| |
| mutex_lock(&dev->mode_config.idr_mutex); |
| obj = idr_find(&dev->mode_config.crtc_idr, id); |
| if (obj && type != DRM_MODE_OBJECT_ANY && obj->type != type) |
| obj = NULL; |
| if (obj && obj->id != id) |
| obj = NULL; |
| /* don't leak out unref'd fb's */ |
| if (obj && (obj->type == DRM_MODE_OBJECT_FB)) |
| obj = NULL; |
| mutex_unlock(&dev->mode_config.idr_mutex); |
| |
| return obj; |
| } |
| |
| /** |
| * drm_mode_object_find - look up a drm object with static lifetime |
| * @dev: drm device |
| * @id: id of the mode object |
| * @type: type of the mode object |
| * |
| * Note that framebuffers cannot be looked up with this functions - since those |
| * are reference counted, they need special treatment. Even with |
| * DRM_MODE_OBJECT_ANY (although that will simply return NULL |
| * rather than WARN_ON()). |
| */ |
| struct drm_mode_object *drm_mode_object_find(struct drm_device *dev, |
| uint32_t id, uint32_t type) |
| { |
| struct drm_mode_object *obj = NULL; |
| |
| /* Framebuffers are reference counted and need their own lookup |
| * function.*/ |
| WARN_ON(type == DRM_MODE_OBJECT_FB); |
| obj = _object_find(dev, id, type); |
| return obj; |
| } |
| EXPORT_SYMBOL(drm_mode_object_find); |
| |
| /** |
| * drm_framebuffer_init - initialize a framebuffer |
| * @dev: DRM device |
| * @fb: framebuffer to be initialized |
| * @funcs: ... with these functions |
| * |
| * Allocates an ID for the framebuffer's parent mode object, sets its mode |
| * functions & device file and adds it to the master fd list. |
| * |
| * IMPORTANT: |
| * This functions publishes the fb and makes it available for concurrent access |
| * by other users. Which means by this point the fb _must_ be fully set up - |
| * since all the fb attributes are invariant over its lifetime, no further |
| * locking but only correct reference counting is required. |
| * |
| * Returns: |
| * Zero on success, error code on failure. |
| */ |
| int drm_framebuffer_init(struct drm_device *dev, struct drm_framebuffer *fb, |
| const struct drm_framebuffer_funcs *funcs) |
| { |
| int ret; |
| |
| mutex_lock(&dev->mode_config.fb_lock); |
| kref_init(&fb->refcount); |
| INIT_LIST_HEAD(&fb->filp_head); |
| fb->dev = dev; |
| fb->funcs = funcs; |
| |
| ret = drm_mode_object_get(dev, &fb->base, DRM_MODE_OBJECT_FB); |
| if (ret) |
| goto out; |
| |
| dev->mode_config.num_fb++; |
| list_add(&fb->head, &dev->mode_config.fb_list); |
| out: |
| mutex_unlock(&dev->mode_config.fb_lock); |
| |
| return 0; |
| } |
| EXPORT_SYMBOL(drm_framebuffer_init); |
| |
| /* dev->mode_config.fb_lock must be held! */ |
| static void __drm_framebuffer_unregister(struct drm_device *dev, |
| struct drm_framebuffer *fb) |
| { |
| mutex_lock(&dev->mode_config.idr_mutex); |
| idr_remove(&dev->mode_config.crtc_idr, fb->base.id); |
| mutex_unlock(&dev->mode_config.idr_mutex); |
| |
| fb->base.id = 0; |
| } |
| |
| static void drm_framebuffer_free(struct kref *kref) |
| { |
| struct drm_framebuffer *fb = |
| container_of(kref, struct drm_framebuffer, refcount); |
| struct drm_device *dev = fb->dev; |
| |
| /* |
| * The lookup idr holds a weak reference, which has not necessarily been |
| * removed at this point. Check for that. |
| */ |
| mutex_lock(&dev->mode_config.fb_lock); |
| if (fb->base.id) { |
| /* Mark fb as reaped and drop idr ref. */ |
| __drm_framebuffer_unregister(dev, fb); |
| } |
| mutex_unlock(&dev->mode_config.fb_lock); |
| |
| fb->funcs->destroy(fb); |
| } |
| |
| static struct drm_framebuffer *__drm_framebuffer_lookup(struct drm_device *dev, |
| uint32_t id) |
| { |
| struct drm_mode_object *obj = NULL; |
| struct drm_framebuffer *fb; |
| |
| mutex_lock(&dev->mode_config.idr_mutex); |
| obj = idr_find(&dev->mode_config.crtc_idr, id); |
| if (!obj || (obj->type != DRM_MODE_OBJECT_FB) || (obj->id != id)) |
| fb = NULL; |
| else |
| fb = obj_to_fb(obj); |
| mutex_unlock(&dev->mode_config.idr_mutex); |
| |
| return fb; |
| } |
| |
| /** |
| * drm_framebuffer_lookup - look up a drm framebuffer and grab a reference |
| * @dev: drm device |
| * @id: id of the fb object |
| * |
| * If successful, this grabs an additional reference to the framebuffer - |
| * callers need to make sure to eventually unreference the returned framebuffer |
| * again, using @drm_framebuffer_unreference. |
| */ |
| struct drm_framebuffer *drm_framebuffer_lookup(struct drm_device *dev, |
| uint32_t id) |
| { |
| struct drm_framebuffer *fb; |
| |
| mutex_lock(&dev->mode_config.fb_lock); |
| fb = __drm_framebuffer_lookup(dev, id); |
| if (fb) { |
| if (!kref_get_unless_zero(&fb->refcount)) |
| fb = NULL; |
| } |
| mutex_unlock(&dev->mode_config.fb_lock); |
| |
| return fb; |
| } |
| EXPORT_SYMBOL(drm_framebuffer_lookup); |
| |
| /** |
| * drm_framebuffer_unreference - unref a framebuffer |
| * @fb: framebuffer to unref |
| * |
| * This functions decrements the fb's refcount and frees it if it drops to zero. |
| */ |
| void drm_framebuffer_unreference(struct drm_framebuffer *fb) |
| { |
| DRM_DEBUG("%p: FB ID: %d (%d)\n", fb, fb->base.id, atomic_read(&fb->refcount.refcount)); |
| kref_put(&fb->refcount, drm_framebuffer_free); |
| } |
| EXPORT_SYMBOL(drm_framebuffer_unreference); |
| |
| /** |
| * drm_framebuffer_reference - incr the fb refcnt |
| * @fb: framebuffer |
| * |
| * This functions increments the fb's refcount. |
| */ |
| void drm_framebuffer_reference(struct drm_framebuffer *fb) |
| { |
| DRM_DEBUG("%p: FB ID: %d (%d)\n", fb, fb->base.id, atomic_read(&fb->refcount.refcount)); |
| kref_get(&fb->refcount); |
| } |
| EXPORT_SYMBOL(drm_framebuffer_reference); |
| |
| static void drm_framebuffer_free_bug(struct kref *kref) |
| { |
| BUG(); |
| } |
| |
| static void __drm_framebuffer_unreference(struct drm_framebuffer *fb) |
| { |
| DRM_DEBUG("%p: FB ID: %d (%d)\n", fb, fb->base.id, atomic_read(&fb->refcount.refcount)); |
| kref_put(&fb->refcount, drm_framebuffer_free_bug); |
| } |
| |
| /** |
| * drm_framebuffer_unregister_private - unregister a private fb from the lookup idr |
| * @fb: fb to unregister |
| * |
| * Drivers need to call this when cleaning up driver-private framebuffers, e.g. |
| * those used for fbdev. Note that the caller must hold a reference of it's own, |
| * i.e. the object may not be destroyed through this call (since it'll lead to a |
| * locking inversion). |
| */ |
| void drm_framebuffer_unregister_private(struct drm_framebuffer *fb) |
| { |
| struct drm_device *dev = fb->dev; |
| |
| mutex_lock(&dev->mode_config.fb_lock); |
| /* Mark fb as reaped and drop idr ref. */ |
| __drm_framebuffer_unregister(dev, fb); |
| mutex_unlock(&dev->mode_config.fb_lock); |
| } |
| EXPORT_SYMBOL(drm_framebuffer_unregister_private); |
| |
| /** |
| * drm_framebuffer_cleanup - remove a framebuffer object |
| * @fb: framebuffer to remove |
| * |
| * Cleanup framebuffer. This function is intended to be used from the drivers |
| * ->destroy callback. It can also be used to clean up driver private |
| * framebuffers embedded into a larger structure. |
| * |
| * Note that this function does not remove the fb from active usuage - if it is |
| * still used anywhere, hilarity can ensue since userspace could call getfb on |
| * the id and get back -EINVAL. Obviously no concern at driver unload time. |
| * |
| * Also, the framebuffer will not be removed from the lookup idr - for |
| * user-created framebuffers this will happen in in the rmfb ioctl. For |
| * driver-private objects (e.g. for fbdev) drivers need to explicitly call |
| * drm_framebuffer_unregister_private. |
| */ |
| void drm_framebuffer_cleanup(struct drm_framebuffer *fb) |
| { |
| struct drm_device *dev = fb->dev; |
| |
| mutex_lock(&dev->mode_config.fb_lock); |
| list_del(&fb->head); |
| dev->mode_config.num_fb--; |
| mutex_unlock(&dev->mode_config.fb_lock); |
| } |
| EXPORT_SYMBOL(drm_framebuffer_cleanup); |
| |
| /** |
| * drm_framebuffer_remove - remove and unreference a framebuffer object |
| * @fb: framebuffer to remove |
| * |
| * Scans all the CRTCs and planes in @dev's mode_config. If they're |
| * using @fb, removes it, setting it to NULL. Then drops the reference to the |
| * passed-in framebuffer. Might take the modeset locks. |
| * |
| * Note that this function optimizes the cleanup away if the caller holds the |
| * last reference to the framebuffer. It is also guaranteed to not take the |
| * modeset locks in this case. |
| */ |
| void drm_framebuffer_remove(struct drm_framebuffer *fb) |
| { |
| struct drm_device *dev = fb->dev; |
| struct drm_crtc *crtc; |
| struct drm_plane *plane; |
| struct drm_mode_set set; |
| int ret; |
| |
| WARN_ON(!list_empty(&fb->filp_head)); |
| |
| /* |
| * drm ABI mandates that we remove any deleted framebuffers from active |
| * useage. But since most sane clients only remove framebuffers they no |
| * longer need, try to optimize this away. |
| * |
| * Since we're holding a reference ourselves, observing a refcount of 1 |
| * means that we're the last holder and can skip it. Also, the refcount |
| * can never increase from 1 again, so we don't need any barriers or |
| * locks. |
| * |
| * Note that userspace could try to race with use and instate a new |
| * usage _after_ we've cleared all current ones. End result will be an |
| * in-use fb with fb-id == 0. Userspace is allowed to shoot its own foot |
| * in this manner. |
| */ |
| if (atomic_read(&fb->refcount.refcount) > 1) { |
| drm_modeset_lock_all(dev); |
| /* remove from any CRTC */ |
| list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) { |
| if (crtc->primary->fb == fb) { |
| /* should turn off the crtc */ |
| memset(&set, 0, sizeof(struct drm_mode_set)); |
| set.crtc = crtc; |
| set.fb = NULL; |
| ret = drm_mode_set_config_internal(&set); |
| if (ret) |
| DRM_ERROR("failed to reset crtc %p when fb was deleted\n", crtc); |
| } |
| } |
| |
| list_for_each_entry(plane, &dev->mode_config.plane_list, head) { |
| if (plane->fb == fb) |
| drm_plane_force_disable(plane); |
| } |
| drm_modeset_unlock_all(dev); |
| } |
| |
| drm_framebuffer_unreference(fb); |
| } |
| EXPORT_SYMBOL(drm_framebuffer_remove); |
| |
| DEFINE_WW_CLASS(crtc_ww_class); |
| |
| /** |
| * drm_crtc_init_with_planes - Initialise a new CRTC object with |
| * specified primary and cursor planes. |
| * @dev: DRM device |
| * @crtc: CRTC object to init |
| * @primary: Primary plane for CRTC |
| * @cursor: Cursor plane for CRTC |
| * @funcs: callbacks for the new CRTC |
| * |
| * Inits a new object created as base part of a driver crtc object. |
| * |
| * Returns: |
| * Zero on success, error code on failure. |
| */ |
| int drm_crtc_init_with_planes(struct drm_device *dev, struct drm_crtc *crtc, |
| struct drm_plane *primary, |
| struct drm_plane *cursor, |
| const struct drm_crtc_funcs *funcs) |
| { |
| struct drm_mode_config *config = &dev->mode_config; |
| int ret; |
| |
| crtc->dev = dev; |
| crtc->funcs = funcs; |
| crtc->invert_dimensions = false; |
| |
| drm_modeset_lock_init(&crtc->mutex); |
| ret = drm_mode_object_get(dev, &crtc->base, DRM_MODE_OBJECT_CRTC); |
| if (ret) |
| return ret; |
| |
| crtc->base.properties = &crtc->properties; |
| |
| list_add_tail(&crtc->head, &config->crtc_list); |
| config->num_crtc++; |
| |
| crtc->primary = primary; |
| crtc->cursor = cursor; |
| if (primary) |
| primary->possible_crtcs = 1 << drm_crtc_index(crtc); |
| if (cursor) |
| cursor->possible_crtcs = 1 << drm_crtc_index(crtc); |
| |
| if (drm_core_check_feature(dev, DRIVER_ATOMIC)) { |
| drm_object_attach_property(&crtc->base, config->prop_active, 0); |
| } |
| |
| return 0; |
| } |
| EXPORT_SYMBOL(drm_crtc_init_with_planes); |
| |
| /** |
| * drm_crtc_cleanup - Clean up the core crtc usage |
| * @crtc: CRTC to cleanup |
| * |
| * This function cleans up @crtc and removes it from the DRM mode setting |
| * core. Note that the function does *not* free the crtc structure itself, |
| * this is the responsibility of the caller. |
| */ |
| void drm_crtc_cleanup(struct drm_crtc *crtc) |
| { |
| struct drm_device *dev = crtc->dev; |
| |
| kfree(crtc->gamma_store); |
| crtc->gamma_store = NULL; |
| |
| drm_modeset_lock_fini(&crtc->mutex); |
| |
| drm_mode_object_put(dev, &crtc->base); |
| list_del(&crtc->head); |
| dev->mode_config.num_crtc--; |
| |
| WARN_ON(crtc->state && !crtc->funcs->atomic_destroy_state); |
| if (crtc->state && crtc->funcs->atomic_destroy_state) |
| crtc->funcs->atomic_destroy_state(crtc, crtc->state); |
| |
| memset(crtc, 0, sizeof(*crtc)); |
| } |
| EXPORT_SYMBOL(drm_crtc_cleanup); |
| |
| /** |
| * drm_crtc_index - find the index of a registered CRTC |
| * @crtc: CRTC to find index for |
| * |
| * Given a registered CRTC, return the index of that CRTC within a DRM |
| * device's list of CRTCs. |
| */ |
| unsigned int drm_crtc_index(struct drm_crtc *crtc) |
| { |
| unsigned int index = 0; |
| struct drm_crtc *tmp; |
| |
| list_for_each_entry(tmp, &crtc->dev->mode_config.crtc_list, head) { |
| if (tmp == crtc) |
| return index; |
| |
| index++; |
| } |
| |
| BUG(); |
| } |
| EXPORT_SYMBOL(drm_crtc_index); |
| |
| /* |
| * drm_mode_remove - remove and free a mode |
| * @connector: connector list to modify |
| * @mode: mode to remove |
| * |
| * Remove @mode from @connector's mode list, then free it. |
| */ |
| static void drm_mode_remove(struct drm_connector *connector, |
| struct drm_display_mode *mode) |
| { |
| list_del(&mode->head); |
| drm_mode_destroy(connector->dev, mode); |
| } |
| |
| /** |
| * drm_display_info_set_bus_formats - set the supported bus formats |
| * @info: display info to store bus formats in |
| * @formats: array containing the supported bus formats |
| * @num_formats: the number of entries in the fmts array |
| * |
| * Store the supported bus formats in display info structure. |
| * See MEDIA_BUS_FMT_* definitions in include/uapi/linux/media-bus-format.h for |
| * a full list of available formats. |
| */ |
| int drm_display_info_set_bus_formats(struct drm_display_info *info, |
| const u32 *formats, |
| unsigned int num_formats) |
| { |
| u32 *fmts = NULL; |
| |
| if (!formats && num_formats) |
| return -EINVAL; |
| |
| if (formats && num_formats) { |
| fmts = kmemdup(formats, sizeof(*formats) * num_formats, |
| GFP_KERNEL); |
| if (!fmts) |
| return -ENOMEM; |
| } |
| |
| kfree(info->bus_formats); |
| info->bus_formats = fmts; |
| info->num_bus_formats = num_formats; |
| |
| return 0; |
| } |
| EXPORT_SYMBOL(drm_display_info_set_bus_formats); |
| |
| /** |
| * drm_connector_get_cmdline_mode - reads the user's cmdline mode |
| * @connector: connector to quwery |
| * |
| * The kernel supports per-connector configration of its consoles through |
| * use of the video= parameter. This function parses that option and |
| * extracts the user's specified mode (or enable/disable status) for a |
| * particular connector. This is typically only used during the early fbdev |
| * setup. |
| */ |
| static void drm_connector_get_cmdline_mode(struct drm_connector *connector) |
| { |
| struct drm_cmdline_mode *mode = &connector->cmdline_mode; |
| char *option = NULL; |
| |
| if (fb_get_options(connector->name, &option)) |
| return; |
| |
| if (!drm_mode_parse_command_line_for_connector(option, |
| connector, |
| mode)) |
| return; |
| |
| if (mode->force) { |
| const char *s; |
| |
| switch (mode->force) { |
| case DRM_FORCE_OFF: |
| s = "OFF"; |
| break; |
| case DRM_FORCE_ON_DIGITAL: |
| s = "ON - dig"; |
| break; |
| default: |
| case DRM_FORCE_ON: |
| s = "ON"; |
| break; |
| } |
| |
| DRM_INFO("forcing %s connector %s\n", connector->name, s); |
| connector->force = mode->force; |
| } |
| |
| DRM_DEBUG_KMS("cmdline mode for connector %s %dx%d@%dHz%s%s%s\n", |
| connector->name, |
| mode->xres, mode->yres, |
| mode->refresh_specified ? mode->refresh : 60, |
| mode->rb ? " reduced blanking" : "", |
| mode->margins ? " with margins" : "", |
| mode->interlace ? " interlaced" : ""); |
| } |
| |
| /** |
| * drm_connector_init - Init a preallocated connector |
| * @dev: DRM device |
| * @connector: the connector to init |
| * @funcs: callbacks for this connector |
| * @connector_type: user visible type of the connector |
| * |
| * Initialises a preallocated connector. Connectors should be |
| * subclassed as part of driver connector objects. |
| * |
| * Returns: |
| * Zero on success, error code on failure. |
| */ |
| int drm_connector_init(struct drm_device *dev, |
| struct drm_connector *connector, |
| const struct drm_connector_funcs *funcs, |
| int connector_type) |
| { |
| struct drm_mode_config *config = &dev->mode_config; |
| int ret; |
| struct ida *connector_ida = |
| &drm_connector_enum_list[connector_type].ida; |
| |
| drm_modeset_lock_all(dev); |
| |
| ret = drm_mode_object_get_reg(dev, &connector->base, DRM_MODE_OBJECT_CONNECTOR, false); |
| if (ret) |
| goto out_unlock; |
| |
| connector->base.properties = &connector->properties; |
| connector->dev = dev; |
| connector->funcs = funcs; |
| connector->connector_type = connector_type; |
| connector->connector_type_id = |
| ida_simple_get(connector_ida, 1, 0, GFP_KERNEL); |
| if (connector->connector_type_id < 0) { |
| ret = connector->connector_type_id; |
| goto out_put; |
| } |
| connector->name = |
| kasprintf(GFP_KERNEL, "%s-%d", |
| drm_connector_enum_list[connector_type].name, |
| connector->connector_type_id); |
| if (!connector->name) { |
| ret = -ENOMEM; |
| goto out_put; |
| } |
| |
| INIT_LIST_HEAD(&connector->probed_modes); |
| INIT_LIST_HEAD(&connector->modes); |
| connector->edid_blob_ptr = NULL; |
| connector->status = connector_status_unknown; |
| |
| drm_connector_get_cmdline_mode(connector); |
| |
| /* We should add connectors at the end to avoid upsetting the connector |
| * index too much. */ |
| list_add_tail(&connector->head, &config->connector_list); |
| config->num_connector++; |
| |
| if (connector_type != DRM_MODE_CONNECTOR_VIRTUAL) |
| drm_object_attach_property(&connector->base, |
| config->edid_property, |
| 0); |
| |
| drm_object_attach_property(&connector->base, |
| config->dpms_property, 0); |
| |
| if (drm_core_check_feature(dev, DRIVER_ATOMIC)) { |
| drm_object_attach_property(&connector->base, config->prop_crtc_id, 0); |
| } |
| |
| connector->debugfs_entry = NULL; |
| |
| out_put: |
| if (ret) |
| drm_mode_object_put(dev, &connector->base); |
| |
| out_unlock: |
| drm_modeset_unlock_all(dev); |
| |
| return ret; |
| } |
| EXPORT_SYMBOL(drm_connector_init); |
| |
| /** |
| * drm_connector_cleanup - cleans up an initialised connector |
| * @connector: connector to cleanup |
| * |
| * Cleans up the connector but doesn't free the object. |
| */ |
| void drm_connector_cleanup(struct drm_connector *connector) |
| { |
| struct drm_device *dev = connector->dev; |
| struct drm_display_mode *mode, *t; |
| |
| if (connector->tile_group) { |
| drm_mode_put_tile_group(dev, connector->tile_group); |
| connector->tile_group = NULL; |
| } |
| |
| list_for_each_entry_safe(mode, t, &connector->probed_modes, head) |
| drm_mode_remove(connector, mode); |
| |
| list_for_each_entry_safe(mode, t, &connector->modes, head) |
| drm_mode_remove(connector, mode); |
| |
| ida_remove(&drm_connector_enum_list[connector->connector_type].ida, |
| connector->connector_type_id); |
| |
| kfree(connector->display_info.bus_formats); |
| drm_mode_object_put(dev, &connector->base); |
| kfree(connector->name); |
| connector->name = NULL; |
| list_del(&connector->head); |
| dev->mode_config.num_connector--; |
| |
| WARN_ON(connector->state && !connector->funcs->atomic_destroy_state); |
| if (connector->state && connector->funcs->atomic_destroy_state) |
| connector->funcs->atomic_destroy_state(connector, |
| connector->state); |
| |
| memset(connector, 0, sizeof(*connector)); |
| } |
| EXPORT_SYMBOL(drm_connector_cleanup); |
| |
| /** |
| * drm_connector_index - find the index of a registered connector |
| * @connector: connector to find index for |
| * |
| * Given a registered connector, return the index of that connector within a DRM |
| * device's list of connectors. |
| */ |
| unsigned int drm_connector_index(struct drm_connector *connector) |
| { |
| unsigned int index = 0; |
| struct drm_connector *tmp; |
| struct drm_mode_config *config = &connector->dev->mode_config; |
| |
| WARN_ON(!drm_modeset_is_locked(&config->connection_mutex)); |
| |
| list_for_each_entry(tmp, &connector->dev->mode_config.connector_list, head) { |
| if (tmp == connector) |
| return index; |
| |
| index++; |
| } |
| |
| BUG(); |
| } |
| EXPORT_SYMBOL(drm_connector_index); |
| |
| /** |
| * drm_connector_register - register a connector |
| * @connector: the connector to register |
| * |
| * Register userspace interfaces for a connector |
| * |
| * Returns: |
| * Zero on success, error code on failure. |
| */ |
| int drm_connector_register(struct drm_connector *connector) |
| { |
| int ret; |
| |
| drm_mode_object_register(connector->dev, &connector->base); |
| |
| ret = drm_sysfs_connector_add(connector); |
| if (ret) |
| return ret; |
| |
| ret = drm_debugfs_connector_add(connector); |
| if (ret) { |
| drm_sysfs_connector_remove(connector); |
| return ret; |
| } |
| |
| return 0; |
| } |
| EXPORT_SYMBOL(drm_connector_register); |
| |
| /** |
| * drm_connector_unregister - unregister a connector |
| * @connector: the connector to unregister |
| * |
| * Unregister userspace interfaces for a connector |
| */ |
| void drm_connector_unregister(struct drm_connector *connector) |
| { |
| drm_sysfs_connector_remove(connector); |
| drm_debugfs_connector_remove(connector); |
| } |
| EXPORT_SYMBOL(drm_connector_unregister); |
| |
| |
| /** |
| * drm_connector_unplug_all - unregister connector userspace interfaces |
| * @dev: drm device |
| * |
| * This function unregisters all connector userspace interfaces in sysfs. Should |
| * be call when the device is disconnected, e.g. from an usb driver's |
| * ->disconnect callback. |
| */ |
| void drm_connector_unplug_all(struct drm_device *dev) |
| { |
| struct drm_connector *connector; |
| |
| /* taking the mode config mutex ends up in a clash with sysfs */ |
| list_for_each_entry(connector, &dev->mode_config.connector_list, head) |
| drm_connector_unregister(connector); |
| |
| } |
| EXPORT_SYMBOL(drm_connector_unplug_all); |
| |
| /** |
| * drm_encoder_init - Init a preallocated encoder |
| * @dev: drm device |
| * @encoder: the encoder to init |
| * @funcs: callbacks for this encoder |
| * @encoder_type: user visible type of the encoder |
| * |
| * Initialises a preallocated encoder. Encoder should be |
| * subclassed as part of driver encoder objects. |
| * |
| * Returns: |
| * Zero on success, error code on failure. |
| */ |
| int drm_encoder_init(struct drm_device *dev, |
| struct drm_encoder *encoder, |
| const struct drm_encoder_funcs *funcs, |
| int encoder_type) |
| { |
| int ret; |
| |
| drm_modeset_lock_all(dev); |
| |
| ret = drm_mode_object_get(dev, &encoder->base, DRM_MODE_OBJECT_ENCODER); |
| if (ret) |
| goto out_unlock; |
| |
| encoder->dev = dev; |
| encoder->encoder_type = encoder_type; |
| encoder->funcs = funcs; |
| encoder->name = kasprintf(GFP_KERNEL, "%s-%d", |
| drm_encoder_enum_list[encoder_type].name, |
| encoder->base.id); |
| if (!encoder->name) { |
| ret = -ENOMEM; |
| goto out_put; |
| } |
| |
| list_add_tail(&encoder->head, &dev->mode_config.encoder_list); |
| dev->mode_config.num_encoder++; |
| |
| out_put: |
| if (ret) |
| drm_mode_object_put(dev, &encoder->base); |
| |
| out_unlock: |
| drm_modeset_unlock_all(dev); |
| |
| return ret; |
| } |
| EXPORT_SYMBOL(drm_encoder_init); |
| |
| /** |
| * drm_encoder_cleanup - cleans up an initialised encoder |
| * @encoder: encoder to cleanup |
| * |
| * Cleans up the encoder but doesn't free the object. |
| */ |
| void drm_encoder_cleanup(struct drm_encoder *encoder) |
| { |
| struct drm_device *dev = encoder->dev; |
| |
| drm_modeset_lock_all(dev); |
| drm_mode_object_put(dev, &encoder->base); |
| kfree(encoder->name); |
| list_del(&encoder->head); |
| dev->mode_config.num_encoder--; |
| drm_modeset_unlock_all(dev); |
| |
| memset(encoder, 0, sizeof(*encoder)); |
| } |
| EXPORT_SYMBOL(drm_encoder_cleanup); |
| |
| /** |
| * drm_universal_plane_init - Initialize a new universal plane object |
| * @dev: DRM device |
| * @plane: plane object to init |
| * @possible_crtcs: bitmask of possible CRTCs |
| * @funcs: callbacks for the new plane |
| * @formats: array of supported formats (%DRM_FORMAT_*) |
| * @format_count: number of elements in @formats |
| * @type: type of plane (overlay, primary, cursor) |
| * |
| * Initializes a plane object of type @type. |
| * |
| * Returns: |
| * Zero on success, error code on failure. |
| */ |
| int drm_universal_plane_init(struct drm_device *dev, struct drm_plane *plane, |
| unsigned long possible_crtcs, |
| const struct drm_plane_funcs *funcs, |
| const uint32_t *formats, uint32_t format_count, |
| enum drm_plane_type type) |
| { |
| struct drm_mode_config *config = &dev->mode_config; |
| int ret; |
| |
| ret = drm_mode_object_get(dev, &plane->base, DRM_MODE_OBJECT_PLANE); |
| if (ret) |
| return ret; |
| |
| drm_modeset_lock_init(&plane->mutex); |
| |
| plane->base.properties = &plane->properties; |
| plane->dev = dev; |
| plane->funcs = funcs; |
| plane->format_types = kmalloc_array(format_count, sizeof(uint32_t), |
| GFP_KERNEL); |
| if (!plane->format_types) { |
| DRM_DEBUG_KMS("out of memory when allocating plane\n"); |
| drm_mode_object_put(dev, &plane->base); |
| return -ENOMEM; |
| } |
| |
| memcpy(plane->format_types, formats, format_count * sizeof(uint32_t)); |
| plane->format_count = format_count; |
| plane->possible_crtcs = possible_crtcs; |
| plane->type = type; |
| |
| list_add_tail(&plane->head, &config->plane_list); |
| config->num_total_plane++; |
| if (plane->type == DRM_PLANE_TYPE_OVERLAY) |
| config->num_overlay_plane++; |
| |
| drm_object_attach_property(&plane->base, |
| config->plane_type_property, |
| plane->type); |
| |
| if (drm_core_check_feature(dev, DRIVER_ATOMIC)) { |
| drm_object_attach_property(&plane->base, config->prop_fb_id, 0); |
| drm_object_attach_property(&plane->base, config->prop_crtc_id, 0); |
| drm_object_attach_property(&plane->base, config->prop_crtc_x, 0); |
| drm_object_attach_property(&plane->base, config->prop_crtc_y, 0); |
| drm_object_attach_property(&plane->base, config->prop_crtc_w, 0); |
| drm_object_attach_property(&plane->base, config->prop_crtc_h, 0); |
| drm_object_attach_property(&plane->base, config->prop_src_x, 0); |
| drm_object_attach_property(&plane->base, config->prop_src_y, 0); |
| drm_object_attach_property(&plane->base, config->prop_src_w, 0); |
| drm_object_attach_property(&plane->base, config->prop_src_h, 0); |
| } |
| |
| return 0; |
| } |
| EXPORT_SYMBOL(drm_universal_plane_init); |
| |
| /** |
| * drm_plane_init - Initialize a legacy plane |
| * @dev: DRM device |
| * @plane: plane object to init |
| * @possible_crtcs: bitmask of possible CRTCs |
| * @funcs: callbacks for the new plane |
| * @formats: array of supported formats (%DRM_FORMAT_*) |
| * @format_count: number of elements in @formats |
| * @is_primary: plane type (primary vs overlay) |
| * |
| * Legacy API to initialize a DRM plane. |
| * |
| * New drivers should call drm_universal_plane_init() instead. |
| * |
| * Returns: |
| * Zero on success, error code on failure. |
| */ |
| int drm_plane_init(struct drm_device *dev, struct drm_plane *plane, |
| unsigned long possible_crtcs, |
| const struct drm_plane_funcs *funcs, |
| const uint32_t *formats, uint32_t format_count, |
| bool is_primary) |
| { |
| enum drm_plane_type type; |
| |
| type = is_primary ? DRM_PLANE_TYPE_PRIMARY : DRM_PLANE_TYPE_OVERLAY; |
| return drm_universal_plane_init(dev, plane, possible_crtcs, funcs, |
| formats, format_count, type); |
| } |
| EXPORT_SYMBOL(drm_plane_init); |
| |
| /** |
| * drm_plane_cleanup - Clean up the core plane usage |
| * @plane: plane to cleanup |
| * |
| * This function cleans up @plane and removes it from the DRM mode setting |
| * core. Note that the function does *not* free the plane structure itself, |
| * this is the responsibility of the caller. |
| */ |
| void drm_plane_cleanup(struct drm_plane *plane) |
| { |
| struct drm_device *dev = plane->dev; |
| |
| drm_modeset_lock_all(dev); |
| kfree(plane->format_types); |
| drm_mode_object_put(dev, &plane->base); |
| |
| BUG_ON(list_empty(&plane->head)); |
| |
| list_del(&plane->head); |
| dev->mode_config.num_total_plane--; |
| if (plane->type == DRM_PLANE_TYPE_OVERLAY) |
| dev->mode_config.num_overlay_plane--; |
| drm_modeset_unlock_all(dev); |
| |
| WARN_ON(plane->state && !plane->funcs->atomic_destroy_state); |
| if (plane->state && plane->funcs->atomic_destroy_state) |
| plane->funcs->atomic_destroy_state(plane, plane->state); |
| |
| memset(plane, 0, sizeof(*plane)); |
| } |
| EXPORT_SYMBOL(drm_plane_cleanup); |
| |
| /** |
| * drm_plane_index - find the index of a registered plane |
| * @plane: plane to find index for |
| * |
| * Given a registered plane, return the index of that CRTC within a DRM |
| * device's list of planes. |
| */ |
| unsigned int drm_plane_index(struct drm_plane *plane) |
| { |
| unsigned int index = 0; |
| struct drm_plane *tmp; |
| |
| list_for_each_entry(tmp, &plane->dev->mode_config.plane_list, head) { |
| if (tmp == plane) |
| return index; |
| |
| index++; |
| } |
| |
| BUG(); |
| } |
| EXPORT_SYMBOL(drm_plane_index); |
| |
| /** |
| * drm_plane_force_disable - Forcibly disable a plane |
| * @plane: plane to disable |
| * |
| * Forces the plane to be disabled. |
| * |
| * Used when the plane's current framebuffer is destroyed, |
| * and when restoring fbdev mode. |
| */ |
| void drm_plane_force_disable(struct drm_plane *plane) |
| { |
| int ret; |
| |
| if (!plane->fb) |
| return; |
| |
| plane->old_fb = plane->fb; |
| ret = plane->funcs->disable_plane(plane); |
| if (ret) { |
| DRM_ERROR("failed to disable plane with busy fb\n"); |
| plane->old_fb = NULL; |
| return; |
| } |
| /* disconnect the plane from the fb and crtc: */ |
| __drm_framebuffer_unreference(plane->old_fb); |
| plane->old_fb = NULL; |
| plane->fb = NULL; |
| plane->crtc = NULL; |
| } |
| EXPORT_SYMBOL(drm_plane_force_disable); |
| |
| static int drm_mode_create_standard_properties(struct drm_device *dev) |
| { |
| struct drm_property *prop; |
| |
| /* |
| * Standard properties (apply to all connectors) |
| */ |
| prop = drm_property_create(dev, DRM_MODE_PROP_BLOB | |
| DRM_MODE_PROP_IMMUTABLE, |
| "EDID", 0); |
| if (!prop) |
| return -ENOMEM; |
| dev->mode_config.edid_property = prop; |
| |
| prop = drm_property_create_enum(dev, 0, |
| "DPMS", drm_dpms_enum_list, |
| ARRAY_SIZE(drm_dpms_enum_list)); |
| if (!prop) |
| return -ENOMEM; |
| dev->mode_config.dpms_property = prop; |
| |
| prop = drm_property_create(dev, |
| DRM_MODE_PROP_BLOB | |
| DRM_MODE_PROP_IMMUTABLE, |
| "PATH", 0); |
| if (!prop) |
| return -ENOMEM; |
| dev->mode_config.path_property = prop; |
| |
| prop = drm_property_create(dev, |
| DRM_MODE_PROP_BLOB | |
| DRM_MODE_PROP_IMMUTABLE, |
| "TILE", 0); |
| if (!prop) |
| return -ENOMEM; |
| dev->mode_config.tile_property = prop; |
| |
| prop = drm_property_create_enum(dev, DRM_MODE_PROP_IMMUTABLE, |
| "type", drm_plane_type_enum_list, |
| ARRAY_SIZE(drm_plane_type_enum_list)); |
| if (!prop) |
| return -ENOMEM; |
| dev->mode_config.plane_type_property = prop; |
| |
| prop = drm_property_create_range(dev, DRM_MODE_PROP_ATOMIC, |
| "SRC_X", 0, UINT_MAX); |
| if (!prop) |
| return -ENOMEM; |
| dev->mode_config.prop_src_x = prop; |
| |
| prop = drm_property_create_range(dev, DRM_MODE_PROP_ATOMIC, |
| "SRC_Y", 0, UINT_MAX); |
| if (!prop) |
| return -ENOMEM; |
| dev->mode_config.prop_src_y = prop; |
| |
| prop = drm_property_create_range(dev, DRM_MODE_PROP_ATOMIC, |
| "SRC_W", 0, UINT_MAX); |
| if (!prop) |
| return -ENOMEM; |
| dev->mode_config.prop_src_w = prop; |
| |
| prop = drm_property_create_range(dev, DRM_MODE_PROP_ATOMIC, |
| "SRC_H", 0, UINT_MAX); |
| if (!prop) |
| return -ENOMEM; |
| dev->mode_config.prop_src_h = prop; |
| |
| prop = drm_property_create_signed_range(dev, DRM_MODE_PROP_ATOMIC, |
| "CRTC_X", INT_MIN, INT_MAX); |
| if (!prop) |
| return -ENOMEM; |
| dev->mode_config.prop_crtc_x = prop; |
| |
| prop = drm_property_create_signed_range(dev, DRM_MODE_PROP_ATOMIC, |
| "CRTC_Y", INT_MIN, INT_MAX); |
| if (!prop) |
| return -ENOMEM; |
| dev->mode_config.prop_crtc_y = prop; |
| |
| prop = drm_property_create_range(dev, DRM_MODE_PROP_ATOMIC, |
| "CRTC_W", 0, INT_MAX); |
| if (!prop) |
| return -ENOMEM; |
| dev->mode_config.prop_crtc_w = prop; |
| |
| prop = drm_property_create_range(dev, DRM_MODE_PROP_ATOMIC, |
| "CRTC_H", 0, INT_MAX); |
| if (!prop) |
| return -ENOMEM; |
| dev->mode_config.prop_crtc_h = prop; |
| |
| prop = drm_property_create_object(dev, DRM_MODE_PROP_ATOMIC, |
| "FB_ID", DRM_MODE_OBJECT_FB); |
| if (!prop) |
| return -ENOMEM; |
| dev->mode_config.prop_fb_id = prop; |
| |
| prop = drm_property_create_object(dev, DRM_MODE_PROP_ATOMIC, |
| "CRTC_ID", DRM_MODE_OBJECT_CRTC); |
| if (!prop) |
| return -ENOMEM; |
| dev->mode_config.prop_crtc_id = prop; |
| |
| prop = drm_property_create_bool(dev, DRM_MODE_PROP_ATOMIC, |
| "ACTIVE"); |
| if (!prop) |
| return -ENOMEM; |
| dev->mode_config.prop_active = prop; |
| |
| return 0; |
| } |
| |
| /** |
| * drm_mode_create_dvi_i_properties - create DVI-I specific connector properties |
| * @dev: DRM device |
| * |
| * Called by a driver the first time a DVI-I connector is made. |
| */ |
| int drm_mode_create_dvi_i_properties(struct drm_device *dev) |
| { |
| struct drm_property *dvi_i_selector; |
| struct drm_property *dvi_i_subconnector; |
| |
| if (dev->mode_config.dvi_i_select_subconnector_property) |
| return 0; |
| |
| dvi_i_selector = |
| drm_property_create_enum(dev, 0, |
| "select subconnector", |
| drm_dvi_i_select_enum_list, |
| ARRAY_SIZE(drm_dvi_i_select_enum_list)); |
| dev->mode_config.dvi_i_select_subconnector_property = dvi_i_selector; |
| |
| dvi_i_subconnector = drm_property_create_enum(dev, DRM_MODE_PROP_IMMUTABLE, |
| "subconnector", |
| drm_dvi_i_subconnector_enum_list, |
| ARRAY_SIZE(drm_dvi_i_subconnector_enum_list)); |
| dev->mode_config.dvi_i_subconnector_property = dvi_i_subconnector; |
| |
| return 0; |
| } |
| EXPORT_SYMBOL(drm_mode_create_dvi_i_properties); |
| |
| /** |
| * drm_create_tv_properties - create TV specific connector properties |
| * @dev: DRM device |
| * @num_modes: number of different TV formats (modes) supported |
| * @modes: array of pointers to strings containing name of each format |
| * |
| * Called by a driver's TV initialization routine, this function creates |
| * the TV specific connector properties for a given device. Caller is |
| * responsible for allocating a list of format names and passing them to |
| * this routine. |
| */ |
| int drm_mode_create_tv_properties(struct drm_device *dev, |
| unsigned int num_modes, |
| char *modes[]) |
| { |
| struct drm_property *tv_selector; |
| struct drm_property *tv_subconnector; |
| unsigned int i; |
| |
| if (dev->mode_config.tv_select_subconnector_property) |
| return 0; |
| |
| /* |
| * Basic connector properties |
| */ |
| tv_selector = drm_property_create_enum(dev, 0, |
| "select subconnector", |
| drm_tv_select_enum_list, |
| ARRAY_SIZE(drm_tv_select_enum_list)); |
| dev->mode_config.tv_select_subconnector_property = tv_selector; |
| |
| tv_subconnector = |
| drm_property_create_enum(dev, DRM_MODE_PROP_IMMUTABLE, |
| "subconnector", |
| drm_tv_subconnector_enum_list, |
| ARRAY_SIZE(drm_tv_subconnector_enum_list)); |
| dev->mode_config.tv_subconnector_property = tv_subconnector; |
| |
| /* |
| * Other, TV specific properties: margins & TV modes. |
| */ |
| dev->mode_config.tv_left_margin_property = |
| drm_property_create_range(dev, 0, "left margin", 0, 100); |
| |
| dev->mode_config.tv_right_margin_property = |
| drm_property_create_range(dev, 0, "right margin", 0, 100); |
| |
| dev->mode_config.tv_top_margin_property = |
| drm_property_create_range(dev, 0, "top margin", 0, 100); |
| |
| dev->mode_config.tv_bottom_margin_property = |
| drm_property_create_range(dev, 0, "bottom margin", 0, 100); |
| |
| dev->mode_config.tv_mode_property = |
| drm_property_create(dev, DRM_MODE_PROP_ENUM, |
| "mode", num_modes); |
| for (i = 0; i < num_modes; i++) |
| drm_property_add_enum(dev->mode_config.tv_mode_property, i, |
| i, modes[i]); |
| |
| dev->mode_config.tv_brightness_property = |
| drm_property_create_range(dev, 0, "brightness", 0, 100); |
| |
| dev->mode_config.tv_contrast_property = |
| drm_property_create_range(dev, 0, "contrast", 0, 100); |
| |
| dev->mode_config.tv_flicker_reduction_property = |
| drm_property_create_range(dev, 0, "flicker reduction", 0, 100); |
| |
| dev->mode_config.tv_overscan_property = |
| drm_property_create_range(dev, 0, "overscan", 0, 100); |
| |
| dev->mode_config.tv_saturation_property = |
| drm_property_create_range(dev, 0, "saturation", 0, 100); |
| |
| dev->mode_config.tv_hue_property = |
| drm_property_create_range(dev, 0, "hue", 0, 100); |
| |
| return 0; |
| } |
| EXPORT_SYMBOL(drm_mode_create_tv_properties); |
| |
| /** |
| * drm_mode_create_scaling_mode_property - create scaling mode property |
| * @dev: DRM device |
| * |
| * Called by a driver the first time it's needed, must be attached to desired |
| * connectors. |
| */ |
| int drm_mode_create_scaling_mode_property(struct drm_device *dev) |
| { |
| struct drm_property *scaling_mode; |
| |
| if (dev->mode_config.scaling_mode_property) |
| return 0; |
| |
| scaling_mode = |
| drm_property_create_enum(dev, 0, "scaling mode", |
| drm_scaling_mode_enum_list, |
| ARRAY_SIZE(drm_scaling_mode_enum_list)); |
| |
| dev->mode_config.scaling_mode_property = scaling_mode; |
| |
| return 0; |
| } |
| EXPORT_SYMBOL(drm_mode_create_scaling_mode_property); |
| |
| /** |
| * drm_mode_create_aspect_ratio_property - create aspect ratio property |
| * @dev: DRM device |
| * |
| * Called by a driver the first time it's needed, must be attached to desired |
| * connectors. |
| * |
| * Returns: |
| * Zero on success, negative errno on failure. |
| */ |
| int drm_mode_create_aspect_ratio_property(struct drm_device *dev) |
| { |
| if (dev->mode_config.aspect_ratio_property) |
| return 0; |
| |
| dev->mode_config.aspect_ratio_property = |
| drm_property_create_enum(dev, 0, "aspect ratio", |
| drm_aspect_ratio_enum_list, |
| ARRAY_SIZE(drm_aspect_ratio_enum_list)); |
| |
| if (dev->mode_config.aspect_ratio_property == NULL) |
| return -ENOMEM; |
| |
| return 0; |
| } |
| EXPORT_SYMBOL(drm_mode_create_aspect_ratio_property); |
| |
| /** |
| * drm_mode_create_dirty_property - create dirty property |
| * @dev: DRM device |
| * |
| * Called by a driver the first time it's needed, must be attached to desired |
| * connectors. |
| */ |
| int drm_mode_create_dirty_info_property(struct drm_device *dev) |
| { |
| struct drm_property *dirty_info; |
| |
| if (dev->mode_config.dirty_info_property) |
| return 0; |
| |
| dirty_info = |
| drm_property_create_enum(dev, DRM_MODE_PROP_IMMUTABLE, |
| "dirty", |
| drm_dirty_info_enum_list, |
| ARRAY_SIZE(drm_dirty_info_enum_list)); |
| dev->mode_config.dirty_info_property = dirty_info; |
| |
| return 0; |
| } |
| EXPORT_SYMBOL(drm_mode_create_dirty_info_property); |
| |
| /** |
| * drm_mode_create_suggested_offset_properties - create suggests offset properties |
| * @dev: DRM device |
| * |
| * Create the the suggested x/y offset property for connectors. |
| */ |
| int drm_mode_create_suggested_offset_properties(struct drm_device *dev) |
| { |
| if (dev->mode_config.suggested_x_property && dev->mode_config.suggested_y_property) |
| return 0; |
| |
| dev->mode_config.suggested_x_property = |
| drm_property_create_range(dev, DRM_MODE_PROP_IMMUTABLE, "suggested X", 0, 0xffffffff); |
| |
| dev->mode_config.suggested_y_property = |
| drm_property_create_range(dev, DRM_MODE_PROP_IMMUTABLE, "suggested Y", 0, 0xffffffff); |
| |
| if (dev->mode_config.suggested_x_property == NULL || |
| dev->mode_config.suggested_y_property == NULL) |
| return -ENOMEM; |
| return 0; |
| } |
| EXPORT_SYMBOL(drm_mode_create_suggested_offset_properties); |
| |
| static int drm_mode_group_init(struct drm_device *dev, struct drm_mode_group *group) |
| { |
| uint32_t total_objects = 0; |
| |
| total_objects += dev->mode_config.num_crtc; |
| total_objects += dev->mode_config.num_connector; |
| total_objects += dev->mode_config.num_encoder; |
| |
| group->id_list = kcalloc(total_objects, sizeof(uint32_t), GFP_KERNEL); |
| if (!group->id_list) |
| return -ENOMEM; |
| |
| group->num_crtcs = 0; |
| group->num_connectors = 0; |
| group->num_encoders = 0; |
| return 0; |
| } |
| |
| void drm_mode_group_destroy(struct drm_mode_group *group) |
| { |
| kfree(group->id_list); |
| group->id_list = NULL; |
| } |
| |
| /* |
| * NOTE: Driver's shouldn't ever call drm_mode_group_init_legacy_group - it is |
| * the drm core's responsibility to set up mode control groups. |
| */ |
| int drm_mode_group_init_legacy_group(struct drm_device *dev, |
| struct drm_mode_group *group) |
| { |
| struct drm_crtc *crtc; |
| struct drm_encoder *encoder; |
| struct drm_connector *connector; |
| int ret; |
| |
| ret = drm_mode_group_init(dev, group); |
| if (ret) |
| return ret; |
| |
| list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) |
| group->id_list[group->num_crtcs++] = crtc->base.id; |
| |
| list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) |
| group->id_list[group->num_crtcs + group->num_encoders++] = |
| encoder->base.id; |
| |
| list_for_each_entry(connector, &dev->mode_config.connector_list, head) |
| group->id_list[group->num_crtcs + group->num_encoders + |
| group->num_connectors++] = connector->base.id; |
| |
| return 0; |
| } |
| EXPORT_SYMBOL(drm_mode_group_init_legacy_group); |
| |
| void drm_reinit_primary_mode_group(struct drm_device *dev) |
| { |
| drm_modeset_lock_all(dev); |
| drm_mode_group_destroy(&dev->primary->mode_group); |
| drm_mode_group_init_legacy_group(dev, &dev->primary->mode_group); |
| drm_modeset_unlock_all(dev); |
| } |
| EXPORT_SYMBOL(drm_reinit_primary_mode_group); |
| |
| /** |
| * drm_crtc_convert_to_umode - convert a drm_display_mode into a modeinfo |
| * @out: drm_mode_modeinfo struct to return to the user |
| * @in: drm_display_mode to use |
| * |
| * Convert a drm_display_mode into a drm_mode_modeinfo structure to return to |
| * the user. |
| */ |
| static void drm_crtc_convert_to_umode(struct drm_mode_modeinfo *out, |
| const struct drm_display_mode *in) |
| { |
| WARN(in->hdisplay > USHRT_MAX || in->hsync_start > USHRT_MAX || |
| in->hsync_end > USHRT_MAX || in->htotal > USHRT_MAX || |
| in->hskew > USHRT_MAX || in->vdisplay > USHRT_MAX || |
| in->vsync_start > USHRT_MAX || in->vsync_end > USHRT_MAX || |
| in->vtotal > USHRT_MAX || in->vscan > USHRT_MAX, |
| "timing values too large for mode info\n"); |
| |
| out->clock = in->clock; |
| out->hdisplay = in->hdisplay; |
| out->hsync_start = in->hsync_start; |
| out->hsync_end = in->hsync_end; |
| out->htotal = in->htotal; |
| out->hskew = in->hskew; |
| out->vdisplay = in->vdisplay; |
| out->vsync_start = in->vsync_start; |
| out->vsync_end = in->vsync_end; |
| out->vtotal = in->vtotal; |
| out->vscan = in->vscan; |
| out->vrefresh = in->vrefresh; |
| out->flags = in->flags; |
| out->type = in->type; |
| strncpy(out->name, in->name, DRM_DISPLAY_MODE_LEN); |
| out->name[DRM_DISPLAY_MODE_LEN-1] = 0; |
| } |
| |
| /** |
| * drm_crtc_convert_umode - convert a modeinfo into a drm_display_mode |
| * @out: drm_display_mode to return to the user |
| * @in: drm_mode_modeinfo to use |
| * |
| * Convert a drm_mode_modeinfo into a drm_display_mode structure to return to |
| * the caller. |
| * |
| * Returns: |
| * Zero on success, negative errno on failure. |
| */ |
| static int drm_crtc_convert_umode(struct drm_display_mode *out, |
| const struct drm_mode_modeinfo *in) |
| { |
| if (in->clock > INT_MAX || in->vrefresh > INT_MAX) |
| return -ERANGE; |
| |
| if ((in->flags & DRM_MODE_FLAG_3D_MASK) > DRM_MODE_FLAG_3D_MAX) |
| return -EINVAL; |
| |
| out->clock = in->clock; |
| out->hdisplay = in->hdisplay; |
| out->hsync_start = in->hsync_start; |
| out->hsync_end = in->hsync_end; |
| out->htotal = in->htotal; |
| out->hskew = in->hskew; |
| out->vdisplay = in->vdisplay; |
| out->vsync_start = in->vsync_start; |
| out->vsync_end = in->vsync_end; |
| out->vtotal = in->vtotal; |
| out->vscan = in->vscan; |
| out->vrefresh = in->vrefresh; |
| out->flags = in->flags; |
| out->type = in->type; |
| strncpy(out->name, in->name, DRM_DISPLAY_MODE_LEN); |
| out->name[DRM_DISPLAY_MODE_LEN-1] = 0; |
| |
| return 0; |
| } |
| |
| /** |
| * drm_mode_getresources - get graphics configuration |
| * @dev: drm device for the ioctl |
| * @data: data pointer for the ioctl |
| * @file_priv: drm file for the ioctl call |
| * |
| * Construct a set of configuration description structures and return |
| * them to the user, including CRTC, connector and framebuffer configuration. |
| * |
| * Called by the user via ioctl. |
| * |
| * Returns: |
| * Zero on success, negative errno on failure. |
| */ |
| int drm_mode_getresources(struct drm_device *dev, void *data, |
| struct drm_file *file_priv) |
| { |
| struct drm_mode_card_res *card_res = data; |
| struct list_head *lh; |
| struct drm_framebuffer *fb; |
| struct drm_connector *connector; |
| struct drm_crtc *crtc; |
| struct drm_encoder *encoder; |
| int ret = 0; |
| int connector_count = 0; |
| int crtc_count = 0; |
| int fb_count = 0; |
| int encoder_count = 0; |
| int copied = 0, i; |
| uint32_t __user *fb_id; |
| uint32_t __user *crtc_id; |
| uint32_t __user *connector_id; |
| uint32_t __user *encoder_id; |
| struct drm_mode_group *mode_group; |
| |
| if (!drm_core_check_feature(dev, DRIVER_MODESET)) |
| return -EINVAL; |
| |
| |
| mutex_lock(&file_priv->fbs_lock); |
| /* |
| * For the non-control nodes we need to limit the list of resources |
| * by IDs in the group list for this node |
| */ |
| list_for_each(lh, &file_priv->fbs) |
| fb_count++; |
| |
| /* handle this in 4 parts */ |
| /* FBs */ |
| if (card_res->count_fbs >= fb_count) { |
| copied = 0; |
| fb_id = (uint32_t __user *)(unsigned long)card_res->fb_id_ptr; |
| list_for_each_entry(fb, &file_priv->fbs, filp_head) { |
| if (put_user(fb->base.id, fb_id + copied)) { |
| mutex_unlock(&file_priv->fbs_lock); |
| return -EFAULT; |
| } |
| copied++; |
| } |
| } |
| card_res->count_fbs = fb_count; |
| mutex_unlock(&file_priv->fbs_lock); |
| |
| /* mode_config.mutex protects the connector list against e.g. DP MST |
| * connector hot-adding. CRTC/Plane lists are invariant. */ |
| mutex_lock(&dev->mode_config.mutex); |
| if (!drm_is_primary_client(file_priv)) { |
| |
| mode_group = NULL; |
| list_for_each(lh, &dev->mode_config.crtc_list) |
| crtc_count++; |
| |
| list_for_each(lh, &dev->mode_config.connector_list) |
| connector_count++; |
| |
| list_for_each(lh, &dev->mode_config.encoder_list) |
| encoder_count++; |
| } else { |
| |
| mode_group = &file_priv->master->minor->mode_group; |
| crtc_count = mode_group->num_crtcs; |
| connector_count = mode_group->num_connectors; |
| encoder_count = mode_group->num_encoders; |
| } |
| |
| card_res->max_height = dev->mode_config.max_height; |
| card_res->min_height = dev->mode_config.min_height; |
| card_res->max_width = dev->mode_config.max_width; |
| card_res->min_width = dev->mode_config.min_width; |
| |
| /* CRTCs */ |
| if (card_res->count_crtcs >= crtc_count) { |
| copied = 0; |
| crtc_id = (uint32_t __user *)(unsigned long)card_res->crtc_id_ptr; |
| if (!mode_group) { |
| list_for_each_entry(crtc, &dev->mode_config.crtc_list, |
| head) { |
| DRM_DEBUG_KMS("[CRTC:%d]\n", crtc->base.id); |
| if (put_user(crtc->base.id, crtc_id + copied)) { |
| ret = -EFAULT; |
| goto out; |
| } |
| copied++; |
| } |
| } else { |
| for (i = 0; i < mode_group->num_crtcs; i++) { |
| if (put_user(mode_group->id_list[i], |
| crtc_id + copied)) { |
| ret = -EFAULT; |
| goto out; |
| } |
| copied++; |
| } |
| } |
| } |
| card_res->count_crtcs = crtc_count; |
| |
| /* Encoders */ |
| if (card_res->count_encoders >= encoder_count) { |
| copied = 0; |
| encoder_id = (uint32_t __user *)(unsigned long)card_res->encoder_id_ptr; |
| if (!mode_group) { |
| list_for_each_entry(encoder, |
| &dev->mode_config.encoder_list, |
| head) { |
| DRM_DEBUG_KMS("[ENCODER:%d:%s]\n", encoder->base.id, |
| encoder->name); |
| if (put_user(encoder->base.id, encoder_id + |
| copied)) { |
| ret = -EFAULT; |
| goto out; |
| } |
| copied++; |
| } |
| } else { |
| for (i = mode_group->num_crtcs; i < mode_group->num_crtcs + mode_group->num_encoders; i++) { |
| if (put_user(mode_group->id_list[i], |
| encoder_id + copied)) { |
| ret = -EFAULT; |
| goto out; |
| } |
| copied++; |
| } |
| |
| } |
| } |
| card_res->count_encoders = encoder_count; |
| |
| /* Connectors */ |
| if (card_res->count_connectors >= connector_count) { |
| copied = 0; |
| connector_id = (uint32_t __user *)(unsigned long)card_res->connector_id_ptr; |
| if (!mode_group) { |
| list_for_each_entry(connector, |
| &dev->mode_config.connector_list, |
| head) { |
| DRM_DEBUG_KMS("[CONNECTOR:%d:%s]\n", |
| connector->base.id, |
| connector->name); |
| if (put_user(connector->base.id, |
| connector_id + copied)) { |
| ret = -EFAULT; |
| goto out; |
| } |
| copied++; |
| } |
| } else { |
| int start = mode_group->num_crtcs + |
| mode_group->num_encoders; |
| for (i = start; i < start + mode_group->num_connectors; i++) { |
| if (put_user(mode_group->id_list[i], |
| connector_id + copied)) { |
| ret = -EFAULT; |
| goto out; |
| } |
| copied++; |
| } |
| } |
| } |
| card_res->count_connectors = connector_count; |
| |
| DRM_DEBUG_KMS("CRTC[%d] CONNECTORS[%d] ENCODERS[%d]\n", card_res->count_crtcs, |
| card_res->count_connectors, card_res->count_encoders); |
| |
| out: |
| mutex_unlock(&dev->mode_config.mutex); |
| return ret; |
| } |
| |
| /** |
| * drm_mode_getcrtc - get CRTC configuration |
| * @dev: drm device for the ioctl |
| * @data: data pointer for the ioctl |
| * @file_priv: drm file for the ioctl call |
| * |
| * Construct a CRTC configuration structure to return to the user. |
| * |
| * Called by the user via ioctl. |
| * |
| * Returns: |
| * Zero on success, negative errno on failure. |
| */ |
| int drm_mode_getcrtc(struct drm_device *dev, |
| void *data, struct drm_file *file_priv) |
| { |
| struct drm_mode_crtc *crtc_resp = data; |
| struct drm_crtc *crtc; |
| |
| if (!drm_core_check_feature(dev, DRIVER_MODESET)) |
| return -EINVAL; |
| |
| crtc = drm_crtc_find(dev, crtc_resp->crtc_id); |
| if (!crtc) |
| return -ENOENT; |
| |
| drm_modeset_lock_crtc(crtc, crtc->primary); |
| crtc_resp->x = crtc->x; |
| crtc_resp->y = crtc->y; |
| crtc_resp->gamma_size = crtc->gamma_size; |
| if (crtc->primary->fb) |
| crtc_resp->fb_id = crtc->primary->fb->base.id; |
| else |
| crtc_resp->fb_id = 0; |
| |
| if (crtc->enabled) { |
| |
| drm_crtc_convert_to_umode(&crtc_resp->mode, &crtc->mode); |
| crtc_resp->mode_valid = 1; |
| |
| } else { |
| crtc_resp->mode_valid = 0; |
| } |
| drm_modeset_unlock_crtc(crtc); |
| |
| return 0; |
| } |
| |
| static bool drm_mode_expose_to_userspace(const struct drm_display_mode *mode, |
| const struct drm_file *file_priv) |
| { |
| /* |
| * If user-space hasn't configured the driver to expose the stereo 3D |
| * modes, don't expose them. |
| */ |
| if (!file_priv->stereo_allowed && drm_mode_is_stereo(mode)) |
| return false; |
| |
| return true; |
| } |
| |
| static struct drm_encoder *drm_connector_get_encoder(struct drm_connector *connector) |
| { |
| /* For atomic drivers only state objects are synchronously updated and |
| * protected by modeset locks, so check those first. */ |
| if (connector->state) |
| return connector->state->best_encoder; |
| return connector->encoder; |
| } |
| |
| /* helper for getconnector and getproperties ioctls */ |
| static int get_properties(struct drm_mode_object *obj, bool atomic, |
| uint32_t __user *prop_ptr, uint64_t __user *prop_values, |
| uint32_t *arg_count_props) |
| { |
| int props_count; |
| int i, ret, copied; |
| |
| props_count = obj->properties->count; |
| if (!atomic) |
| props_count -= obj->properties->atomic_count; |
| |
| if ((*arg_count_props >= props_count) && props_count) { |
| for (i = 0, copied = 0; copied < props_count; i++) { |
| struct drm_property *prop = obj->properties->properties[i]; |
| uint64_t val; |
| |
| if ((prop->flags & DRM_MODE_PROP_ATOMIC) && !atomic) |
| continue; |
| |
| ret = drm_object_property_get_value(obj, prop, &val); |
| if (ret) |
| return ret; |
| |
| if (put_user(prop->base.id, prop_ptr + copied)) |
| return -EFAULT; |
| |
| if (put_user(val, prop_values + copied)) |
| return -EFAULT; |
| |
| copied++; |
| } |
| } |
| *arg_count_props = props_count; |
| |
| return 0; |
| } |
| |
| /** |
| * drm_mode_getconnector - get connector configuration |
| * @dev: drm device for the ioctl |
| * @data: data pointer for the ioctl |
| * @file_priv: drm file for the ioctl call |
| * |
| * Construct a connector configuration structure to return to the user. |
| * |
| * Called by the user via ioctl. |
| * |
| * Returns: |
| * Zero on success, negative errno on failure. |
| */ |
| int drm_mode_getconnector(struct drm_device *dev, void *data, |
| struct drm_file *file_priv) |
| { |
| struct drm_mode_get_connector *out_resp = data; |
| struct drm_connector *connector; |
| struct drm_encoder *encoder; |
| struct drm_display_mode *mode; |
| int mode_count = 0; |
| int encoders_count = 0; |
| int ret = 0; |
| int copied = 0; |
| int i; |
| struct drm_mode_modeinfo u_mode; |
| struct drm_mode_modeinfo __user *mode_ptr; |
| uint32_t __user *encoder_ptr; |
| |
| if (!drm_core_check_feature(dev, DRIVER_MODESET)) |
| return -EINVAL; |
| |
| memset(&u_mode, 0, sizeof(struct drm_mode_modeinfo)); |
| |
| DRM_DEBUG_KMS("[CONNECTOR:%d:?]\n", out_resp->connector_id); |
| |
| mutex_lock(&dev->mode_config.mutex); |
| |
| connector = drm_connector_find(dev, out_resp->connector_id); |
| if (!connector) { |
| ret = -ENOENT; |
| goto out; |
| } |
| |
| for (i = 0; i < DRM_CONNECTOR_MAX_ENCODER; i++) |
| if (connector->encoder_ids[i] != 0) |
| encoders_count++; |
| |
| if (out_resp->count_modes == 0) { |
| connector->funcs->fill_modes(connector, |
| dev->mode_config.max_width, |
| dev->mode_config.max_height); |
| } |
| |
| /* delayed so we get modes regardless of pre-fill_modes state */ |
| list_for_each_entry(mode, &connector->modes, head) |
| if (drm_mode_expose_to_userspace(mode, file_priv)) |
| mode_count++; |
| |
| out_resp->connector_id = connector->base.id; |
| out_resp->connector_type = connector->connector_type; |
| out_resp->connector_type_id = connector->connector_type_id; |
| out_resp->mm_width = connector->display_info.width_mm; |
| out_resp->mm_height = connector->display_info.height_mm; |
| out_resp->subpixel = connector->display_info.subpixel_order; |
| out_resp->connection = connector->status; |
| |
| drm_modeset_lock(&dev->mode_config.connection_mutex, NULL); |
| encoder = drm_connector_get_encoder(connector); |
| if (encoder) |
| out_resp->encoder_id = encoder->base.id; |
| else |
| out_resp->encoder_id = 0; |
| |
| /* |
| * This ioctl is called twice, once to determine how much space is |
| * needed, and the 2nd time to fill it. |
| */ |
| if ((out_resp->count_modes >= mode_count) && mode_count) { |
| copied = 0; |
| mode_ptr = (struct drm_mode_modeinfo __user *)(unsigned long)out_resp->modes_ptr; |
| list_for_each_entry(mode, &connector->modes, head) { |
| if (!drm_mode_expose_to_userspace(mode, file_priv)) |
| continue; |
| |
| drm_crtc_convert_to_umode(&u_mode, mode); |
| if (copy_to_user(mode_ptr + copied, |
| &u_mode, sizeof(u_mode))) { |
| ret = -EFAULT; |
| goto out; |
| } |
| copied++; |
| } |
| } |
| out_resp->count_modes = mode_count; |
| |
| ret = get_properties(&connector->base, file_priv->atomic, |
| (uint32_t __user *)(unsigned long)(out_resp->props_ptr), |
| (uint64_t __user *)(unsigned long)(out_resp->prop_values_ptr), |
| &out_resp->count_props); |
| if (ret) |
| goto out; |
| |
| if ((out_resp->count_encoders >= encoders_count) && encoders_count) { |
| copied = 0; |
| encoder_ptr = (uint32_t __user *)(unsigned long)(out_resp->encoders_ptr); |
| for (i = 0; i < DRM_CONNECTOR_MAX_ENCODER; i++) { |
| if (connector->encoder_ids[i] != 0) { |
| if (put_user(connector->encoder_ids[i], |
| encoder_ptr + copied)) { |
| ret = -EFAULT; |
| goto out; |
| } |
| copied++; |
| } |
| } |
| } |
| out_resp->count_encoders = encoders_count; |
| |
| out: |
| drm_modeset_unlock(&dev->mode_config.connection_mutex); |
| mutex_unlock(&dev->mode_config.mutex); |
| |
| return ret; |
| } |
| |
| static struct drm_crtc *drm_encoder_get_crtc(struct drm_encoder *encoder) |
| { |
| struct drm_connector *connector; |
| struct drm_device *dev = encoder->dev; |
| bool uses_atomic = false; |
| |
| /* For atomic drivers only state objects are synchronously updated and |
| * protected by modeset locks, so check those first. */ |
| list_for_each_entry(connector, &dev->mode_config.connector_list, head) { |
| if (!connector->state) |
| continue; |
| |
| uses_atomic = true; |
| |
| if (connector->state->best_encoder != encoder) |
| continue; |
| |
| return connector->state->crtc; |
| } |
| |
| /* Don't return stale data (e.g. pending async disable). */ |
| if (uses_atomic) |
| return NULL; |
| |
| return encoder->crtc; |
| } |
| |
| /** |
| * drm_mode_getencoder - get encoder configuration |
| * @dev: drm device for the ioctl |
| * @data: data pointer for the ioctl |
| * @file_priv: drm file for the ioctl call |
| * |
| * Construct a encoder configuration structure to return to the user. |
| * |
| * Called by the user via ioctl. |
| * |
| * Returns: |
| * Zero on success, negative errno on failure. |
| */ |
| int drm_mode_getencoder(struct drm_device *dev, void *data, |
| struct drm_file *file_priv) |
| { |
| struct drm_mode_get_encoder *enc_resp = data; |
| struct drm_encoder *encoder; |
| struct drm_crtc *crtc; |
| |
| if (!drm_core_check_feature(dev, DRIVER_MODESET)) |
| return -EINVAL; |
| |
| encoder = drm_encoder_find(dev, enc_resp->encoder_id); |
| if (!encoder) |
| return -ENOENT; |
| |
| drm_modeset_lock(&dev->mode_config.connection_mutex, NULL); |
| crtc = drm_encoder_get_crtc(encoder); |
| if (crtc) |
| enc_resp->crtc_id = crtc->base.id; |
| else if (encoder->crtc) |
| enc_resp->crtc_id = encoder->crtc->base.id; |
| else |
| enc_resp->crtc_id = 0; |
| drm_modeset_unlock(&dev->mode_config.connection_mutex); |
| |
| enc_resp->encoder_type = encoder->encoder_type; |
| enc_resp->encoder_id = encoder->base.id; |
| enc_resp->possible_crtcs = encoder->possible_crtcs; |
| enc_resp->possible_clones = encoder->possible_clones; |
| |
| return 0; |
| } |
| |
| /** |
| * drm_mode_getplane_res - enumerate all plane resources |
| * @dev: DRM device |
| * @data: ioctl data |
| * @file_priv: DRM file info |
| * |
| * Construct a list of plane ids to return to the user. |
| * |
| * Called by the user via ioctl. |
| * |
| * Returns: |
| * Zero on success, negative errno on failure. |
| */ |
| int drm_mode_getplane_res(struct drm_device *dev, void *data, |
| struct drm_file *file_priv) |
| { |
| struct drm_mode_get_plane_res *plane_resp = data; |
| struct drm_mode_config *config; |
| struct drm_plane *plane; |
| uint32_t __user *plane_ptr; |
| int copied = 0; |
| unsigned num_planes; |
| |
| if (!drm_core_check_feature(dev, DRIVER_MODESET)) |
| return -EINVAL; |
| |
| config = &dev->mode_config; |
| |
| if (file_priv->universal_planes) |
| num_planes = config->num_total_plane; |
| else |
| num_planes = config->num_overlay_plane; |
| |
| /* |
| * This ioctl is called twice, once to determine how much space is |
| * needed, and the 2nd time to fill it. |
| */ |
| if (num_planes && |
| (plane_resp->count_planes >= num_planes)) { |
| plane_ptr = (uint32_t __user *)(unsigned long)plane_resp->plane_id_ptr; |
| |
| /* Plane lists are invariant, no locking needed. */ |
| list_for_each_entry(plane, &config->plane_list, head) { |
| /* |
| * Unless userspace set the 'universal planes' |
| * capability bit, only advertise overlays. |
| */ |
| if (plane->type != DRM_PLANE_TYPE_OVERLAY && |
| !file_priv->universal_planes) |
| continue; |
| |
| if (put_user(plane->base.id, plane_ptr + copied)) |
| return -EFAULT; |
| copied++; |
| } |
| } |
| plane_resp->count_planes = num_planes; |
| |
| return 0; |
| } |
| |
| /** |
| * drm_mode_getplane - get plane configuration |
| * @dev: DRM device |
| * @data: ioctl data |
| * @file_priv: DRM file info |
| * |
| * Construct a plane configuration structure to return to the user. |
| * |
| * Called by the user via ioctl. |
| * |
| * Returns: |
| * Zero on success, negative errno on failure. |
| */ |
| int drm_mode_getplane(struct drm_device *dev, void *data, |
| struct drm_file *file_priv) |
| { |
| struct drm_mode_get_plane *plane_resp = data; |
| struct drm_plane *plane; |
| uint32_t __user *format_ptr; |
| |
| if (!drm_core_check_feature(dev, DRIVER_MODESET)) |
| return -EINVAL; |
| |
| plane = drm_plane_find(dev, plane_resp->plane_id); |
| if (!plane) |
| return -ENOENT; |
| |
| drm_modeset_lock(&plane->mutex, NULL); |
| if (plane->crtc) |
| plane_resp->crtc_id = plane->crtc->base.id; |
| else |
| plane_resp->crtc_id = 0; |
| |
| if (plane->fb) |
| plane_resp->fb_id = plane->fb->base.id; |
| else |
| plane_resp->fb_id = 0; |
| drm_modeset_unlock(&plane->mutex); |
| |
| plane_resp->plane_id = plane->base.id; |
| plane_resp->possible_crtcs = plane->possible_crtcs; |
| plane_resp->gamma_size = 0; |
| |
| /* |
| * This ioctl is called twice, once to determine how much space is |
| * needed, and the 2nd time to fill it. |
| */ |
| if (plane->format_count && |
| (plane_resp->count_format_types >= plane->format_count)) { |
| format_ptr = (uint32_t __user *)(unsigned long)plane_resp->format_type_ptr; |
| if (copy_to_user(format_ptr, |
| plane->format_types, |
| sizeof(uint32_t) * plane->format_count)) { |
| return -EFAULT; |
| } |
| } |
| plane_resp->count_format_types = plane->format_count; |
| |
| return 0; |
| } |
| |
| /* |
| * setplane_internal - setplane handler for internal callers |
| * |
| * Note that we assume an extra reference has already been taken on fb. If the |
| * update fails, this reference will be dropped before return; if it succeeds, |
| * the previous framebuffer (if any) will be unreferenced instead. |
| * |
| * src_{x,y,w,h} are provided in 16.16 fixed point format |
| */ |
| static int __setplane_internal(struct drm_plane *plane, |
| struct drm_crtc *crtc, |
| struct drm_framebuffer *fb, |
| int32_t crtc_x, int32_t crtc_y, |
| uint32_t crtc_w, uint32_t crtc_h, |
| /* src_{x,y,w,h} values are 16.16 fixed point */ |
| uint32_t src_x, uint32_t src_y, |
| uint32_t src_w, uint32_t src_h) |
| { |
| int ret = 0; |
| unsigned int fb_width, fb_height; |
| unsigned int i; |
| |
| /* No fb means shut it down */ |
| if (!fb) { |
| plane->old_fb = plane->fb; |
| ret = plane->funcs->disable_plane(plane); |
| if (!ret) { |
| plane->crtc = NULL; |
| plane->fb = NULL; |
| } else { |
| plane->old_fb = NULL; |
| } |
| goto out; |
| } |
| |
| /* Check whether this plane is usable on this CRTC */ |
| if (!(plane->possible_crtcs & drm_crtc_mask(crtc))) { |
| DRM_DEBUG_KMS("Invalid crtc for plane\n"); |
| ret = -EINVAL; |
| goto out; |
| } |
| |
| /* Check whether this plane supports the fb pixel format. */ |
| for (i = 0; i < plane->format_count; i++) |
| if (fb->pixel_format == plane->format_types[i]) |
| break; |
| if (i == plane->format_count) { |
| DRM_DEBUG_KMS("Invalid pixel format %s\n", |
| drm_get_format_name(fb->pixel_format)); |
| ret = -EINVAL; |
| goto out; |
| } |
| |
| fb_width = fb->width << 16; |
| fb_height = fb->height << 16; |
| |
| /* Make sure source coordinates are inside the fb. */ |
| if (src_w > fb_width || |
| src_x > fb_width - src_w || |
| src_h > fb_height || |
| src_y > fb_height - src_h) { |
| DRM_DEBUG_KMS("Invalid source coordinates " |
| "%u.%06ux%u.%06u+%u.%06u+%u.%06u\n", |
| src_w >> 16, ((src_w & 0xffff) * 15625) >> 10, |
| src_h >> 16, ((src_h & 0xffff) * 15625) >> 10, |
| src_x >> 16, ((src_x & 0xffff) * 15625) >> 10, |
| src_y >> 16, ((src_y & 0xffff) * 15625) >> 10); |
| ret = -ENOSPC; |
| goto out; |
| } |
| |
| plane->old_fb = plane->fb; |
| ret = plane->funcs->update_plane(plane, crtc, fb, |
| crtc_x, crtc_y, crtc_w, crtc_h, |
| src_x, src_y, src_w, src_h); |
| if (!ret) { |
| plane->crtc = crtc; |
| plane->fb = fb; |
| fb = NULL; |
| } else { |
| plane->old_fb = NULL; |
| } |
| |
| out: |
| if (fb) |
| drm_framebuffer_unreference(fb); |
| if (plane->old_fb) |
| drm_framebuffer_unreference(plane->old_fb); |
| plane->old_fb = NULL; |
| |
| return ret; |
| } |
| |
| static int setplane_internal(struct drm_plane *plane, |
| struct drm_crtc *crtc, |
| struct drm_framebuffer *fb, |
| int32_t crtc_x, int32_t crtc_y, |
| uint32_t crtc_w, uint32_t crtc_h, |
| /* src_{x,y,w,h} values are 16.16 fixed point */ |
| uint32_t src_x, uint32_t src_y, |
| uint32_t src_w, uint32_t src_h) |
| { |
| int ret; |
| |
| drm_modeset_lock_all(plane->dev); |
| ret = __setplane_internal(plane, crtc, fb, |
| crtc_x, crtc_y, crtc_w, crtc_h, |
| src_x, src_y, src_w, src_h); |
| drm_modeset_unlock_all(plane->dev); |
| |
| return ret; |
| } |
| |
| /** |
| * drm_mode_setplane - configure a plane's configuration |
| * @dev: DRM device |
| * @data: ioctl data* |
| * @file_priv: DRM file info |
| * |
| * Set plane configuration, including placement, fb, scaling, and other factors. |
| * Or pass a NULL fb to disable (planes may be disabled without providing a |
| * valid crtc). |
| * |
| * Returns: |
| * Zero on success, negative errno on failure. |
| */ |
| int drm_mode_setplane(struct drm_device *dev, void *data, |
| struct drm_file *file_priv) |
| { |
| struct drm_mode_set_plane *plane_req = data; |
| struct drm_plane *plane; |
| struct drm_crtc *crtc = NULL; |
| struct drm_framebuffer *fb = NULL; |
| |
| if (!drm_core_check_feature(dev, DRIVER_MODESET)) |
| return -EINVAL; |
| |
| /* Give drivers some help against integer overflows */ |
| if (plane_req->crtc_w > INT_MAX || |
| plane_req->crtc_x > INT_MAX - (int32_t) plane_req->crtc_w || |
| plane_req->crtc_h > INT_MAX || |
| plane_req->crtc_y > INT_MAX - (int32_t) plane_req->crtc_h) { |
| DRM_DEBUG_KMS("Invalid CRTC coordinates %ux%u+%d+%d\n", |
| plane_req->crtc_w, plane_req->crtc_h, |
| plane_req->crtc_x, plane_req->crtc_y); |
| return -ERANGE; |
| } |
| |
| /* |
| * First, find the plane, crtc, and fb objects. If not available, |
| * we don't bother to call the driver. |
| */ |
| plane = drm_plane_find(dev, plane_req->plane_id); |
| if (!plane) { |
| DRM_DEBUG_KMS("Unknown plane ID %d\n", |
| plane_req->plane_id); |
| return -ENOENT; |
| } |
| |
| if (plane_req->fb_id) { |
| fb = drm_framebuffer_lookup(dev, plane_req->fb_id); |
| if (!fb) { |
| DRM_DEBUG_KMS("Unknown framebuffer ID %d\n", |
| plane_req->fb_id); |
| return -ENOENT; |
| } |
| |
| crtc = drm_crtc_find(dev, plane_req->crtc_id); |
| if (!crtc) { |
| DRM_DEBUG_KMS("Unknown crtc ID %d\n", |
| plane_req->crtc_id); |
| return -ENOENT; |
| } |
| } |
| |
| /* |
| * setplane_internal will take care of deref'ing either the old or new |
| * framebuffer depending on success. |
| */ |
| return setplane_internal(plane, crtc, fb, |
| plane_req->crtc_x, plane_req->crtc_y, |
| plane_req->crtc_w, plane_req->crtc_h, |
| plane_req->src_x, plane_req->src_y, |
| plane_req->src_w, plane_req->src_h); |
| } |
| |
| /** |
| * drm_mode_set_config_internal - helper to call ->set_config |
| * @set: modeset config to set |
| * |
| * This is a little helper to wrap internal calls to the ->set_config driver |
| * interface. The only thing it adds is correct refcounting dance. |
| * |
| * Returns: |
| * Zero on success, negative errno on failure. |
| */ |
| int drm_mode_set_config_internal(struct drm_mode_set *set) |
| { |
| struct drm_crtc *crtc = set->crtc; |
| struct drm_framebuffer *fb; |
| struct drm_crtc *tmp; |
| int ret; |
| |
| /* |
| * NOTE: ->set_config can also disable other crtcs (if we steal all |
| * connectors from it), hence we need to refcount the fbs across all |
| * crtcs. Atomic modeset will have saner semantics ... |
| */ |
| list_for_each_entry(tmp, &crtc->dev->mode_config.crtc_list, head) |
| tmp->primary->old_fb = tmp->primary->fb; |
| |
| fb = set->fb; |
| |
| ret = crtc->funcs->set_config(set); |
| if (ret == 0) { |
| crtc->primary->crtc = crtc; |
| crtc->primary->fb = fb; |
| } |
| |
| list_for_each_entry(tmp, &crtc->dev->mode_config.crtc_list, head) { |
| if (tmp->primary->fb) |
| drm_framebuffer_reference(tmp->primary->fb); |
| if (tmp->primary->old_fb) |
| drm_framebuffer_unreference(tmp->primary->old_fb); |
| tmp->primary->old_fb = NULL; |
| } |
| |
| return ret; |
| } |
| EXPORT_SYMBOL(drm_mode_set_config_internal); |
| |
| /** |
| * drm_crtc_get_hv_timing - Fetches hdisplay/vdisplay for given mode |
| * @mode: mode to query |
| * @hdisplay: hdisplay value to fill in |
| * @vdisplay: vdisplay value to fill in |
| * |
| * The vdisplay value will be doubled if the specified mode is a stereo mode of |
| * the appropriate layout. |
| */ |
| void drm_crtc_get_hv_timing(const struct drm_display_mode *mode, |
| int *hdisplay, int *vdisplay) |
| { |
| struct drm_display_mode adjusted; |
| |
| drm_mode_copy(&adjusted, mode); |
| drm_mode_set_crtcinfo(&adjusted, CRTC_STEREO_DOUBLE_ONLY); |
| *hdisplay = adjusted.crtc_hdisplay; |
| *vdisplay = adjusted.crtc_vdisplay; |
| } |
| EXPORT_SYMBOL(drm_crtc_get_hv_timing); |
| |
| /** |
| * drm_crtc_check_viewport - Checks that a framebuffer is big enough for the |
| * CRTC viewport |
| * @crtc: CRTC that framebuffer will be displayed on |
| * @x: x panning |
| * @y: y panning |
| * @mode: mode that framebuffer will be displayed under |
| * @fb: framebuffer to check size of |
| */ |
| int drm_crtc_check_viewport(const struct drm_crtc *crtc, |
| int x, int y, |
| const struct drm_display_mode *mode, |
| const struct drm_framebuffer *fb) |
| |
| { |
| int hdisplay, vdisplay; |
| |
| drm_crtc_get_hv_timing(mode, &hdisplay, &vdisplay); |
| |
| if (crtc->invert_dimensions) |
| swap(hdisplay, vdisplay); |
| |
| if (hdisplay > fb->width || |
| vdisplay > fb->height || |
| x > fb->width - hdisplay || |
| y > fb->height - vdisplay) { |
| DRM_DEBUG_KMS("Invalid fb size %ux%u for CRTC viewport %ux%u+%d+%d%s.\n", |
| fb->width, fb->height, hdisplay, vdisplay, x, y, |
| crtc->invert_dimensions ? " (inverted)" : ""); |
| return -ENOSPC; |
| } |
| |
| return 0; |
| } |
| EXPORT_SYMBOL(drm_crtc_check_viewport); |
| |
| /** |
| * drm_mode_setcrtc - set CRTC configuration |
| * @dev: drm device for the ioctl |
| * @data: data pointer for the ioctl |
| * @file_priv: drm file for the ioctl call |
| * |
| * Build a new CRTC configuration based on user request. |
| * |
| * Called by the user via ioctl. |
| * |
| * Returns: |
| * Zero on success, negative errno on failure. |
| */ |
| int drm_mode_setcrtc(struct drm_device *dev, void *data, |
| struct drm_file *file_priv) |
| { |
| struct drm_mode_config *config = &dev->mode_config; |
| struct drm_mode_crtc *crtc_req = data; |
| struct drm_crtc *crtc; |
| struct drm_connector **connector_set = NULL, *connector; |
| struct drm_framebuffer *fb = NULL; |
| struct drm_display_mode *mode = NULL; |
| struct drm_mode_set set; |
| uint32_t __user *set_connectors_ptr; |
| int ret; |
| int i; |
| |
| if (!drm_core_check_feature(dev, DRIVER_MODESET)) |
| return -EINVAL; |
| |
| /* For some reason crtc x/y offsets are signed internally. */ |
| if (crtc_req->x > INT_MAX || crtc_req->y > INT_MAX) |
| return -ERANGE; |
| |
| drm_modeset_lock_all(dev); |
| crtc = drm_crtc_find(dev, crtc_req->crtc_id); |
| if (!crtc) { |
| DRM_DEBUG_KMS("Unknown CRTC ID %d\n", crtc_req->crtc_id); |
| ret = -ENOENT; |
| goto out; |
| } |
| DRM_DEBUG_KMS("[CRTC:%d]\n", crtc->base.id); |
| |
| if (crtc_req->mode_valid) { |
| /* If we have a mode we need a framebuffer. */ |
| /* If we pass -1, set the mode with the currently bound fb */ |
| if (crtc_req->fb_id == -1) { |
| if (!crtc->primary->fb) { |
| DRM_DEBUG_KMS("CRTC doesn't have current FB\n"); |
| ret = -EINVAL; |
| goto out; |
| } |
| fb = crtc->primary->fb; |
| /* Make refcounting symmetric with the lookup path. */ |
| drm_framebuffer_reference(fb); |
| } else { |
| fb = drm_framebuffer_lookup(dev, crtc_req->fb_id); |
| if (!fb) { |
| DRM_DEBUG_KMS("Unknown FB ID%d\n", |
| crtc_req->fb_id); |
| ret = -ENOENT; |
| goto out; |
| } |
| } |
| |
| mode = drm_mode_create(dev); |
| if (!mode) { |
| ret = -ENOMEM; |
| goto out; |
| } |
| |
| ret = drm_crtc_convert_umode(mode, &crtc_req->mode); |
| if (ret) { |
| DRM_DEBUG_KMS("Invalid mode\n"); |
| goto out; |
| } |
| |
| mode->status = drm_mode_validate_basic(mode); |
| if (mode->status != MODE_OK) { |
| ret = -EINVAL; |
| goto out; |
| } |
| |
| drm_mode_set_crtcinfo(mode, CRTC_INTERLACE_HALVE_V); |
| |
| ret = drm_crtc_check_viewport(crtc, crtc_req->x, crtc_req->y, |
| mode, fb); |
| if (ret) |
| goto out; |
| |
| } |
| |
| if (crtc_req->count_connectors == 0 && mode) { |
| DRM_DEBUG_KMS("Count connectors is 0 but mode set\n"); |
| ret = -EINVAL; |
| goto out; |
| } |
| |
| if (crtc_req->count_connectors > 0 && (!mode || !fb)) { |
| DRM_DEBUG_KMS("Count connectors is %d but no mode or fb set\n", |
| crtc_req->count_connectors); |
| ret = -EINVAL; |
| goto out; |
| } |
| |
| if (crtc_req->count_connectors > 0) { |
| u32 out_id; |
| |
| /* Avoid unbounded kernel memory allocation */ |
| if (crtc_req->count_connectors > config->num_connector) { |
| ret = -EINVAL; |
| goto out; |
| } |
| |
| connector_set = kmalloc_array(crtc_req->count_connectors, |
| sizeof(struct drm_connector *), |
| GFP_KERNEL); |
| if (!connector_set) { |
| ret = -ENOMEM; |
| goto out; |
| } |
| |
| for (i = 0; i < crtc_req->count_connectors; i++) { |
| set_connectors_ptr = (uint32_t __user *)(unsigned long)crtc_req->set_connectors_ptr; |
| if (get_user(out_id, &set_connectors_ptr[i])) { |
| ret = -EFAULT; |
| goto out; |
| } |
| |
| connector = drm_connector_find(dev, out_id); |
| if (!connector) { |
| DRM_DEBUG_KMS("Connector id %d unknown\n", |
| out_id); |
| ret = -ENOENT; |
| goto out; |
| } |
| DRM_DEBUG_KMS("[CONNECTOR:%d:%s]\n", |
| connector->base.id, |
| connector->name); |
| |
| connector_set[i] = connector; |
| } |
| } |
| |
| set.crtc = crtc; |
| set.x = crtc_req->x; |
| set.y = crtc_req->y; |
| set.mode = mode; |
| set.connectors = connector_set; |
| set.num_connectors = crtc_req->count_connectors; |
| set.fb = fb; |
| ret = drm_mode_set_config_internal(&set); |
| |
| out: |
| if (fb) |
| drm_framebuffer_unreference(fb); |
| |
| kfree(connector_set); |
| drm_mode_destroy(dev, mode); |
| drm_modeset_unlock_all(dev); |
| return ret; |
| } |
| |
| /** |
| * drm_mode_cursor_universal - translate legacy cursor ioctl call into a |
| * universal plane handler call |
| * @crtc: crtc to update cursor for |
| * @req: data pointer for the ioctl |
| * @file_priv: drm file for the ioctl call |
| * |
| * Legacy cursor ioctl's work directly with driver buffer handles. To |
| * translate legacy ioctl calls into universal plane handler calls, we need to |
| * wrap the native buffer handle in a drm_framebuffer. |
| * |
| * Note that we assume any handle passed to the legacy ioctls was a 32-bit ARGB |
| * buffer with a pitch of 4*width; the universal plane interface should be used |
| * directly in cases where the hardware can support other buffer settings and |
| * userspace wants to make use of these capabilities. |
| * |
| * Returns: |
| * Zero on success, negative errno on failure. |
| */ |
| static int drm_mode_cursor_universal(struct drm_crtc *crtc, |
| struct drm_mode_cursor2 *req, |
| struct drm_file *file_priv) |
| { |
| struct drm_device *dev = crtc->dev; |
| struct drm_framebuffer *fb = NULL; |
| struct drm_mode_fb_cmd2 fbreq = { |
| .width = req->width, |
| .height = req->height, |
| .pixel_format = DRM_FORMAT_ARGB8888, |
| .pitches = { req->width * 4 }, |
| .handles = { req->handle }, |
| }; |
| int32_t crtc_x, crtc_y; |
| uint32_t crtc_w = 0, crtc_h = 0; |
| uint32_t src_w = 0, src_h = 0; |
| int ret = 0; |
| |
| BUG_ON(!crtc->cursor); |
| WARN_ON(crtc->cursor->crtc != crtc && crtc->cursor->crtc != NULL); |
| |
| /* |
| * Obtain fb we'll be using (either new or existing) and take an extra |
| * reference to it if fb != null. setplane will take care of dropping |
| * the reference if the plane update fails. |
| */ |
| if (req->flags & DRM_MODE_CURSOR_BO) { |
| if (req->handle) { |
| fb = add_framebuffer_internal(dev, &fbreq, file_priv); |
| if (IS_ERR(fb)) { |
| DRM_DEBUG_KMS("failed to wrap cursor buffer in drm framebuffer\n"); |
| return PTR_ERR(fb); |
| } |
| |
| drm_framebuffer_reference(fb); |
| } else { |
| fb = NULL; |
| } |
| } else { |
| fb = crtc->cursor->fb; |
| if (fb) |
| drm_framebuffer_reference(fb); |
| } |
| |
| if (req->flags & DRM_MODE_CURSOR_MOVE) { |
| crtc_x = req->x; |
| crtc_y = req->y; |
| } else { |
| crtc_x = crtc->cursor_x; |
| crtc_y = crtc->cursor_y; |
| } |
| |
| if (fb) { |
| crtc_w = fb->width; |
| crtc_h = fb->height; |
| src_w = fb->width << 16; |
| src_h = fb->height << 16; |
| } |
| |
| /* |
| * setplane_internal will take care of deref'ing either the old or new |
| * framebuffer depending on success. |
| */ |
| ret = __setplane_internal(crtc->cursor, crtc, fb, |
| crtc_x, crtc_y, crtc_w, crtc_h, |
| 0, 0, src_w, src_h); |
| |
| /* Update successful; save new cursor position, if necessary */ |
| if (ret == 0 && req->flags & DRM_MODE_CURSOR_MOVE) { |
| crtc->cursor_x = req->x; |
| crtc->cursor_y = req->y; |
| } |
| |
| return ret; |
| } |
| |
| static int drm_mode_cursor_common(struct drm_device *dev, |
| struct drm_mode_cursor2 *req, |
| struct drm_file *file_priv) |
| { |
| struct drm_crtc *crtc; |
| int ret = 0; |
| |
| if (!drm_core_check_feature(dev, DRIVER_MODESET)) |
| return -EINVAL; |
| |
| if (!req->flags || (~DRM_MODE_CURSOR_FLAGS & req->flags)) |
| return -EINVAL; |
| |
| crtc = drm_crtc_find(dev, req->crtc_id); |
| if (!crtc) { |
| DRM_DEBUG_KMS("Unknown CRTC ID %d\n", req->crtc_id); |
| return -ENOENT; |
| } |
| |
| /* |
| * If this crtc has a universal cursor plane, call that plane's update |
| * handler rather than using legacy cursor handlers. |
| */ |
| drm_modeset_lock_crtc(crtc, crtc->cursor); |
| if (crtc->cursor) { |
| ret = drm_mode_cursor_universal(crtc, req, file_priv); |
| goto out; |
| } |
| |
| if (req->flags & DRM_MODE_CURSOR_BO) { |
| if (!crtc->funcs->cursor_set && !crtc->funcs->cursor_set2) { |
| ret = -ENXIO; |
| goto out; |
| } |
| /* Turns off the cursor if handle is 0 */ |
| if (crtc->funcs->cursor_set2) |
| ret = crtc->funcs->cursor_set2(crtc, file_priv, req->handle, |
| req->width, req->height, req->hot_x, req->hot_y); |
| else |
| ret = crtc->funcs->cursor_set(crtc, file_priv, req->handle, |
| req->width, req->height); |
| } |
| |
| if (req->flags & DRM_MODE_CURSOR_MOVE) { |
| if (crtc->funcs->cursor_move) { |
| ret = crtc->funcs->cursor_move(crtc, req->x, req->y); |
| } else { |
| ret = -EFAULT; |
| goto out; |
| } |
| } |
| out: |
| drm_modeset_unlock_crtc(crtc); |
| |
| return ret; |
| |
| } |
| |
| |
| /** |
| * drm_mode_cursor_ioctl - set CRTC's cursor configuration |
| * @dev: drm device for the ioctl |
| * @data: data pointer for the ioctl |
| * @file_priv: drm file for the ioctl call |
| * |
| * Set the cursor configuration based on user request. |
| * |
| * Called by the user via ioctl. |
| * |
| * Returns: |
| * Zero on success, negative errno on failure. |
| */ |
| int drm_mode_cursor_ioctl(struct drm_device *dev, |
| void *data, struct drm_file *file_priv) |
| { |
| struct drm_mode_cursor *req = data; |
| struct drm_mode_cursor2 new_req; |
| |
| memcpy(&new_req, req, sizeof(struct drm_mode_cursor)); |
| new_req.hot_x = new_req.hot_y = 0; |
| |
| return drm_mode_cursor_common(dev, &new_req, file_priv); |
| } |
| |
| /** |
| * drm_mode_cursor2_ioctl - set CRTC's cursor configuration |
| * @dev: drm device for the ioctl |
| * @data: data pointer for the ioctl |
| * @file_priv: drm file for the ioctl call |
| * |
| * Set the cursor configuration based on user request. This implements the 2nd |
| * version of the cursor ioctl, which allows userspace to additionally specify |
| * the hotspot of the pointer. |
| * |
| * Called by the user via ioctl. |
| * |
| * Returns: |
| * Zero on success, negative errno on failure. |
| */ |
| int drm_mode_cursor2_ioctl(struct drm_device *dev, |
| void *data, struct drm_file *file_priv) |
| { |
| struct drm_mode_cursor2 *req = data; |
| |
| return drm_mode_cursor_common(dev, req, file_priv); |
| } |
| |
| /** |
| * drm_mode_legacy_fb_format - compute drm fourcc code from legacy description |
| * @bpp: bits per pixels |
| * @depth: bit depth per pixel |
| * |
| * Computes a drm fourcc pixel format code for the given @bpp/@depth values. |
| * Useful in fbdev emulation code, since that deals in those values. |
| */ |
| uint32_t drm_mode_legacy_fb_format(uint32_t bpp, uint32_t depth) |
| { |
| uint32_t fmt; |
| |
| switch (bpp) { |
| case 8: |
| fmt = DRM_FORMAT_C8; |
| break; |
| case 16: |
| if (depth == 15) |
| fmt = DRM_FORMAT_XRGB1555; |
| else |
| fmt = DRM_FORMAT_RGB565; |
| break; |
| case 24: |
| fmt = DRM_FORMAT_RGB888; |
| break; |
| case 32: |
| if (depth == 24) |
| fmt = DRM_FORMAT_XRGB8888; |
| else if (depth == 30) |
| fmt = DRM_FORMAT_XRGB2101010; |
| else |
| fmt = DRM_FORMAT_ARGB8888; |
| break; |
| default: |
| DRM_ERROR("bad bpp, assuming x8r8g8b8 pixel format\n"); |
| fmt = DRM_FORMAT_XRGB8888; |
| break; |
| } |
| |
| return fmt; |
| } |
| EXPORT_SYMBOL(drm_mode_legacy_fb_format); |
| |
| /** |
| * drm_mode_addfb - add an FB to the graphics configuration |
| * @dev: drm device for the ioctl |
| * @data: data pointer for the ioctl |
| * @file_priv: drm file for the ioctl call |
| * |
| * Add a new FB to the specified CRTC, given a user request. This is the |
| * original addfb ioctl which only supported RGB formats. |
| * |
| * Called by the user via ioctl. |
| * |
| * Returns: |
| * Zero on success, negative errno on failure. |
| */ |
| int drm_mode_addfb(struct drm_device *dev, |
| void *data, struct drm_file *file_priv) |
| { |
| struct drm_mode_fb_cmd *or = data; |
| struct drm_mode_fb_cmd2 r = {}; |
| int ret; |
| |
| /* convert to new format and call new ioctl */ |
| r.fb_id = or->fb_id; |
| r.width = or->width; |
| r.height = or->height; |
| r.pitches[0] = or->pitch; |
| r.pixel_format = drm_mode_legacy_fb_format(or->bpp, or->depth); |
| r.handles[0] = or->handle; |
| |
| ret = drm_mode_addfb2(dev, &r, file_priv); |
| if (ret) |
| return ret; |
| |
| or->fb_id = r.fb_id; |
| |
| return 0; |
| } |
| |
| static int format_check(const struct drm_mode_fb_cmd2 *r) |
| { |
| uint32_t format = r->pixel_format & ~DRM_FORMAT_BIG_ENDIAN; |
| |
| switch (format) { |
| case DRM_FORMAT_C8: |
| case DRM_FORMAT_RGB332: |
| case DRM_FORMAT_BGR233: |
| case DRM_FORMAT_XRGB4444: |
| case DRM_FORMAT_XBGR4444: |
| case DRM_FORMAT_RGBX4444: |
| case DRM_FORMAT_BGRX4444: |
| case DRM_FORMAT_ARGB4444: |
| case DRM_FORMAT_ABGR4444: |
| case DRM_FORMAT_RGBA4444: |
| case DRM_FORMAT_BGRA4444: |
| case DRM_FORMAT_XRGB1555: |
| case DRM_FORMAT_XBGR1555: |
| case DRM_FORMAT_RGBX5551: |
| case DRM_FORMAT_BGRX5551: |
| case DRM_FORMAT_ARGB1555: |
| case DRM_FORMAT_ABGR1555: |
| case DRM_FORMAT_RGBA5551: |
| case DRM_FORMAT_BGRA5551: |
| case DRM_FORMAT_RGB565: |
| case DRM_FORMAT_BGR565: |
| case DRM_FORMAT_RGB888: |
| case DRM_FORMAT_BGR888: |
| case DRM_FORMAT_XRGB8888: |
| case DRM_FORMAT_XBGR8888: |
| case DRM_FORMAT_RGBX8888: |
| case DRM_FORMAT_BGRX8888: |
| case DRM_FORMAT_ARGB8888: |
| case DRM_FORMAT_ABGR8888: |
| case DRM_FORMAT_RGBA8888: |
| case DRM_FORMAT_BGRA8888: |
| case DRM_FORMAT_XRGB2101010: |
| case DRM_FORMAT_XBGR2101010: |
| case DRM_FORMAT_RGBX1010102: |
| case DRM_FORMAT_BGRX1010102: |
| case DRM_FORMAT_ARGB2101010: |
| case DRM_FORMAT_ABGR2101010: |
| case DRM_FORMAT_RGBA1010102: |
| case DRM_FORMAT_BGRA1010102: |
| case DRM_FORMAT_YUYV: |
| case DRM_FORMAT_YVYU: |
| case DRM_FORMAT_UYVY: |
| case DRM_FORMAT_VYUY: |
| case DRM_FORMAT_AYUV: |
| case DRM_FORMAT_NV12: |
| case DRM_FORMAT_NV21: |
| case DRM_FORMAT_NV16: |
| case DRM_FORMAT_NV61: |
| case DRM_FORMAT_NV24: |
| case DRM_FORMAT_NV42: |
| case DRM_FORMAT_YUV410: |
| case DRM_FORMAT_YVU410: |
| case DRM_FORMAT_YUV411: |
| case DRM_FORMAT_YVU411: |
| case DRM_FORMAT_YUV420: |
| case DRM_FORMAT_YVU420: |
| case DRM_FORMAT_YUV422: |
| case DRM_FORMAT_YVU422: |
| case DRM_FORMAT_YUV444: |
| case DRM_FORMAT_YVU444: |
| return 0; |
| default: |
| DRM_DEBUG_KMS("invalid pixel format %s\n", |
| drm_get_format_name(r->pixel_format)); |
| return -EINVAL; |
| } |
| } |
| |
| static int framebuffer_check(const struct drm_mode_fb_cmd2 *r) |
| { |
| int ret, hsub, vsub, num_planes, i; |
| |
| ret = format_check(r); |
| if (ret) { |
| DRM_DEBUG_KMS("bad framebuffer format %s\n", |
| drm_get_format_name(r->pixel_format)); |
| return ret; |
| } |
| |
| hsub = drm_format_horz_chroma_subsampling(r->pixel_format); |
| vsub = drm_format_vert_chroma_subsampling(r->pixel_format); |
| num_planes = drm_format_num_planes(r->pixel_format); |
| |
| if (r->width == 0 || r->width % hsub) { |
| DRM_DEBUG_KMS("bad framebuffer width %u\n", r->width); |
| return -EINVAL; |
| } |
| |
| if (r->height == 0 || r->height % vsub) { |
| DRM_DEBUG_KMS("bad framebuffer height %u\n", r->height); |
| return -EINVAL; |
| } |
| |
| for (i = 0; i < num_planes; i++) { |
| unsigned int width = r->width / (i != 0 ? hsub : 1); |
| unsigned int height = r->height / (i != 0 ? vsub : 1); |
| unsigned int cpp = drm_format_plane_cpp(r->pixel_format, i); |
| |
| if (!r->handles[i]) { |
| DRM_DEBUG_KMS("no buffer object handle for plane %d\n", i); |
| return -EINVAL; |
| } |
| |
| if ((uint64_t) width * cpp > UINT_MAX) |
| return -ERANGE; |
| |
| if ((uint64_t) height * r->pitches[i] + r->offsets[i] > UINT_MAX) |
| return -ERANGE; |
| |
| if (r->pitches[i] < width * cpp) { |
| DRM_DEBUG_KMS("bad pitch %u for plane %d\n", r->pitches[i], i); |
| return -EINVAL; |
| } |
| } |
| |
| return 0; |
| } |
| |
| static struct drm_framebuffer *add_framebuffer_internal(struct drm_device *dev, |
| struct drm_mode_fb_cmd2 *r, |
| struct drm_file *file_priv) |
| { |
| struct drm_mode_config *config = &dev->mode_config; |
| struct drm_framebuffer *fb; |
| int ret; |
| |
| if (r->flags & ~DRM_MODE_FB_INTERLACED) { |
| DRM_DEBUG_KMS("bad framebuffer flags 0x%08x\n", r->flags); |
| return ERR_PTR(-EINVAL); |
| } |
| |
| if ((config->min_width > r->width) || (r->width > config->max_width)) { |
| DRM_DEBUG_KMS("bad framebuffer width %d, should be >= %d && <= %d\n", |
| r->width, config->min_width, config->max_width); |
| return ERR_PTR(-EINVAL); |
| } |
| if ((config->min_height > r->height) || (r->height > config->max_height)) { |
| DRM_DEBUG_KMS("bad framebuffer height %d, should be >= %d && <= %d\n", |
| r->height, config->min_height, config->max_height); |
| return ERR_PTR(-EINVAL); |
| } |
| |
| ret = framebuffer_check(r); |
| if (ret) |
| return ERR_PTR(ret); |
| |
| fb = dev->mode_config.funcs->fb_create(dev, file_priv, r); |
| if (IS_ERR(fb)) { |
| DRM_DEBUG_KMS("could not create framebuffer\n"); |
| return fb; |
| } |
| |
| mutex_lock(&file_priv->fbs_lock); |
| r->fb_id = fb->base.id; |
| list_add(&fb->filp_head, &file_priv->fbs); |
| DRM_DEBUG_KMS("[FB:%d]\n", fb->base.id); |
| mutex_unlock(&file_priv->fbs_lock); |
| |
| return fb; |
| } |
| |
| /** |
| * drm_mode_addfb2 - add an FB to the graphics configuration |
| * @dev: drm device for the ioctl |
| * @data: data pointer for the ioctl |
| * @file_priv: drm file for the ioctl call |
| * |
| * Add a new FB to the specified CRTC, given a user request with format. This is |
| * the 2nd version of the addfb ioctl, which supports multi-planar framebuffers |
| * and uses fourcc codes as pixel format specifiers. |
| * |
| * Called by the user via ioctl. |
| * |
| * Returns: |
| * Zero on success, negative errno on failure. |
| */ |
| int drm_mode_addfb2(struct drm_device *dev, |
| void *data, struct drm_file *file_priv) |
| { |
| struct drm_framebuffer *fb; |
| |
| if (!drm_core_check_feature(dev, DRIVER_MODESET)) |
| return -EINVAL; |
| |
| fb = add_framebuffer_internal(dev, data, file_priv); |
| if (IS_ERR(fb)) |
| return PTR_ERR(fb); |
| |
| return 0; |
| } |
| |
| /** |
| * drm_mode_rmfb - remove an FB from the configuration |
| * @dev: drm device for the ioctl |
| * @data: data pointer for the ioctl |
| * @file_priv: drm file for the ioctl call |
| * |
| * Remove the FB specified by the user. |
| * |
| * Called by the user via ioctl. |
| * |
| * Returns: |
| * Zero on success, negative errno on failure. |
| */ |
| int drm_mode_rmfb(struct drm_device *dev, |
| void *data, struct drm_file *file_priv) |
| { |
| struct drm_framebuffer *fb = NULL; |
| struct drm_framebuffer *fbl = NULL; |
| uint32_t *id = data; |
| int found = 0; |
| |
| if (!drm_core_check_feature(dev, DRIVER_MODESET)) |
| return -EINVAL; |
| |
| mutex_lock(&file_priv->fbs_lock); |
| mutex_lock(&dev->mode_config.fb_lock); |
| fb = __drm_framebuffer_lookup(dev, *id); |
| if (!fb) |
| goto fail_lookup; |
| |
| list_for_each_entry(fbl, &file_priv->fbs, filp_head) |
| if (fb == fbl) |
| found = 1; |
| if (!found) |
| goto fail_lookup; |
| |
| /* Mark fb as reaped, we still have a ref from fpriv->fbs. */ |
| __drm_framebuffer_unregister(dev, fb); |
| |
| list_del_init(&fb->filp_head); |
| mutex_unlock(&dev->mode_config.fb_lock); |
| mutex_unlock(&file_priv->fbs_lock); |
| |
| drm_framebuffer_remove(fb); |
| |
| return 0; |
| |
| fail_lookup: |
| mutex_unlock(&dev->mode_config.fb_lock); |
| mutex_unlock(&file_priv->fbs_lock); |
| |
| return -ENOENT; |
| } |
| |
| /** |
| * drm_mode_getfb - get FB info |
| * @dev: drm device for the ioctl |
| * @data: data pointer for the ioctl |
| * @file_priv: drm file for the ioctl call |
| * |
| * Lookup the FB given its ID and return info about it. |
| * |
| * Called by the user via ioctl. |
| * |
| * Returns: |
| * Zero on success, negative errno on failure. |
| */ |
| int drm_mode_getfb(struct drm_device *dev, |
| void *data, struct drm_file *file_priv) |
| { |
| struct drm_mode_fb_cmd *r = data; |
| struct drm_framebuffer *fb; |
| int ret; |
| |
| if (!drm_core_check_feature(dev, DRIVER_MODESET)) |
| return -EINVAL; |
| |
| fb = drm_framebuffer_lookup(dev, r->fb_id); |
| if (!fb) |
| return -ENOENT; |
| |
| r->height = fb->height; |
| r->width = fb->width; |
| r->depth = fb->depth; |
| r->bpp = fb->bits_per_pixel; |
| r->pitch = fb->pitches[0]; |
| if (fb->funcs->create_handle) { |
| if (file_priv->is_master || capable(CAP_SYS_ADMIN) || |
| drm_is_control_client(file_priv)) { |
| ret = fb->funcs->create_handle(fb, file_priv, |
| &r->handle); |
| } else { |
| /* GET_FB() is an unprivileged ioctl so we must not |
| * return a buffer-handle to non-master processes! For |
| * backwards-compatibility reasons, we cannot make |
| * GET_FB() privileged, so just return an invalid handle |
| * for non-masters. */ |
| r->handle = 0; |
| ret = 0; |
| } |
| } else { |
| ret = -ENODEV; |
| } |
| |
| drm_framebuffer_unreference(fb); |
| |
| return ret; |
| } |
| |
| /** |
| * drm_mode_dirtyfb_ioctl - flush frontbuffer rendering on an FB |
| * @dev: drm device for the ioctl |
| * @data: data pointer for the ioctl |
| * @file_priv: drm file for the ioctl call |
| * |
| * Lookup the FB and flush out the damaged area supplied by userspace as a clip |
| * rectangle list. Generic userspace which does frontbuffer rendering must call |
| * this ioctl to flush out the changes on manual-update display outputs, e.g. |
| * usb display-link, mipi manual update panels or edp panel self refresh modes. |
| * |
| * Modesetting drivers which always update the frontbuffer do not need to |
| * implement the corresponding ->dirty framebuffer callback. |
| * |
| * Called by the user via ioctl. |
| * |
| * Returns: |
| * Zero on success, negative errno on failure. |
| */ |
| int drm_mode_dirtyfb_ioctl(struct drm_device *dev, |
| void *data, struct drm_file *file_priv) |
| { |
| struct drm_clip_rect __user *clips_ptr; |
| struct drm_clip_rect *clips = NULL; |
| struct drm_mode_fb_dirty_cmd *r = data; |
| struct drm_framebuffer *fb; |
| unsigned flags; |
| int num_clips; |
| int ret; |
| |
| if (!drm_core_check_feature(dev, DRIVER_MODESET)) |
| return -EINVAL; |
| |
| fb = drm_framebuffer_lookup(dev, r->fb_id); |
| if (!fb) |
| return -ENOENT; |
| |
| num_clips = r->num_clips; |
| clips_ptr = (struct drm_clip_rect __user *)(unsigned long)r->clips_ptr; |
| |
| if (!num_clips != !clips_ptr) { |
| ret = -EINVAL; |
| goto out_err1; |
| } |
| |
| flags = DRM_MODE_FB_DIRTY_FLAGS & r->flags; |
| |
| /* If userspace annotates copy, clips must come in pairs */ |
| if (flags & DRM_MODE_FB_DIRTY_ANNOTATE_COPY && (num_clips % 2)) { |
| ret = -EINVAL; |
| goto out_err1; |
| } |
| |
| if (num_clips && clips_ptr) { |
| if (num_clips < 0 || num_clips > DRM_MODE_FB_DIRTY_MAX_CLIPS) { |
| ret = -EINVAL; |
| goto out_err1; |
| } |
| clips = kcalloc(num_clips, sizeof(*clips), GFP_KERNEL); |
| if (!clips) { |
| ret = -ENOMEM; |
| goto out_err1; |
| } |
| |
| ret = copy_from_user(clips, clips_ptr, |
| num_clips * sizeof(*clips)); |
| if (ret) { |
| ret = -EFAULT; |
| goto out_err2; |
| } |
| } |
| |
| if (fb->funcs->dirty) { |
| ret = fb->funcs->dirty(fb, file_priv, flags, r->color, |
| clips, num_clips); |
| } else { |
| ret = -ENOSYS; |
| } |
| |
| out_err2: |
| kfree(clips); |
| out_err1: |
| drm_framebuffer_unreference(fb); |
| |
| return ret; |
| } |
| |
| |
| /** |
| * drm_fb_release - remove and free the FBs on this file |
| * @priv: drm file for the ioctl |
| * |
| * Destroy all the FBs associated with @filp. |
| * |
| * Called by the user via ioctl. |
| * |
| * Returns: |
| * Zero on success, negative errno on failure. |
| */ |
| void drm_fb_release(struct drm_file *priv) |
| { |
| struct drm_device *dev = priv->minor->dev; |
| struct drm_framebuffer *fb, *tfb; |
| |
| /* |
| * When the file gets released that means no one else can access the fb |
| * list any more, so no need to grab fpriv->fbs_lock. And we need to |
| * avoid upsetting lockdep since the universal cursor code adds a |
| * framebuffer while holding mutex locks. |
| * |
| * Note that a real deadlock between fpriv->fbs_lock and the modeset |
| * locks is impossible here since no one else but this function can get |
| * at it any more. |
| */ |
| list_for_each_entry_safe(fb, tfb, &priv->fbs, filp_head) { |
| |
| mutex_lock(&dev->mode_config.fb_lock); |
| /* Mark fb as reaped, we still have a ref from fpriv->fbs. */ |
| __drm_framebuffer_unregister(dev, fb); |
| mutex_unlock(&dev->mode_config.fb_lock); |
| |
| list_del_init(&fb->filp_head); |
| |
| /* This will also drop the fpriv->fbs reference. */ |
| drm_framebuffer_remove(fb); |
| } |
| } |
| |
| /** |
| * drm_property_create - create a new property type |
| * @dev: drm device |
| * @flags: flags specifying the property type |
| * @name: name of the property |
| * @num_values: number of pre-defined values |
| * |
| * This creates a new generic drm property which can then be attached to a drm |
| * object with drm_object_attach_property. The returned property object must be |
| * freed with drm_property_destroy. |
| * |
| * Note that the DRM core keeps a per-device list of properties and that, if |
| * drm_mode_config_cleanup() is called, it will destroy all properties created |
| * by the driver. |
| * |
| * Returns: |
| * A pointer to the newly created property on success, NULL on failure. |
| */ |
| struct drm_property *drm_property_create(struct drm_device *dev, int flags, |
| const char *name, int num_values) |
| { |
| struct drm_property *property = NULL; |
| int ret; |
| |
| property = kzalloc(sizeof(struct drm_property), GFP_KERNEL); |
| if (!property) |
| return NULL; |
| |
| property->dev = dev; |
| |
| if (num_values) { |
| property->values = kcalloc(num_values, sizeof(uint64_t), |
| GFP_KERNEL); |
| if (!property->values) |
| goto fail; |
| } |
| |
| ret = drm_mode_object_get(dev, &property->base, DRM_MODE_OBJECT_PROPERTY); |
| if (ret) |
| goto fail; |
| |
| property->flags = flags; |
| property->num_values = num_values; |
| INIT_LIST_HEAD(&property->enum_list); |
| |
| if (name) { |
| strncpy(property->name, name, DRM_PROP_NAME_LEN); |
| property->name[DRM_PROP_NAME_LEN-1] = '\0'; |
| } |
| |
| list_add_tail(&property->head, &dev->mode_config.property_list); |
| |
| WARN_ON(!drm_property_type_valid(property)); |
| |
| return property; |
| fail: |
| kfree(property->values); |
| kfree(property); |
| return NULL; |
| } |
| EXPORT_SYMBOL(drm_property_create); |
| |
| /** |
| * drm_property_create_enum - create a new enumeration property type |
| * @dev: drm device |
| * @flags: flags specifying the property type |
| * @name: name of the property |
| * @props: enumeration lists with property values |
| * @num_values: number of pre-defined values |
| * |
| * This creates a new generic drm property which can then be attached to a drm |
| * object with drm_object_attach_property. The returned property object must be |
| * freed with drm_property_destroy. |
| * |
| * Userspace is only allowed to set one of the predefined values for enumeration |
| * properties. |
| * |
| * Returns: |
| * A pointer to the newly created property on success, NULL on failure. |
| */ |
| struct drm_property *drm_property_create_enum(struct drm_device *dev, int flags, |
| const char *name, |
| const struct drm_prop_enum_list *props, |
| int num_values) |
| { |
| struct drm_property *property; |
| int i, ret; |
| |
| flags |= DRM_MODE_PROP_ENUM; |
| |
| property = drm_property_create(dev, flags, name, num_values); |
| if (!property) |
| return NULL; |
| |
| for (i = 0; i < num_values; i++) { |
| ret = drm_property_add_enum(property, i, |
| props[i].type, |
| props[i].name); |
| if (ret) { |
| drm_property_destroy(dev, property); |
| return NULL; |
| } |
| } |
| |
| return property; |
| } |
| EXPORT_SYMBOL(drm_property_create_enum); |
| |
| /** |
| * drm_property_create_bitmask - create a new bitmask property type |
| * @dev: drm device |
| * @flags: flags specifying the property type |
| * @name: name of the property |
| * @props: enumeration lists with property bitflags |
| * @num_props: size of the @props array |
| * @supported_bits: bitmask of all supported enumeration values |
| * |
| * This creates a new bitmask drm property which can then be attached to a drm |
| * object with drm_object_attach_property. The returned property object must be |
| * freed with drm_property_destroy. |
| * |
| * Compared to plain enumeration properties userspace is allowed to set any |
| * or'ed together combination of the predefined property bitflag values |
| * |
| * Returns: |
| * A pointer to the newly created property on success, NULL on failure. |
| */ |
| struct drm_property *drm_property_create_bitmask(struct drm_device *dev, |
| int flags, const char *name, |
| const struct drm_prop_enum_list *props, |
| int num_props, |
| uint64_t supported_bits) |
| { |
| struct drm_property *property; |
| int i, ret, index = 0; |
| int num_values = hweight64(supported_bits); |
| |
| flags |= DRM_MODE_PROP_BITMASK; |
| |
| property = drm_property_create(dev, flags, name, num_values); |
| if (!property) |
| return NULL; |
| for (i = 0; i < num_props; i++) { |
| if (!(supported_bits & (1ULL << props[i].type))) |
| continue; |
| |
| if (WARN_ON(index >= num_values)) { |
| drm_property_destroy(dev, property); |
| return NULL; |
| } |
| |
| ret = drm_property_add_enum(property, index++, |
| props[i].type, |
| props[i].name); |
| if (ret) { |
| drm_property_destroy(dev, property); |
| return NULL; |
| } |
| } |
| |
| return property; |
| } |
| EXPORT_SYMBOL(drm_property_create_bitmask); |
| |
| static struct drm_property *property_create_range(struct drm_device *dev, |
| int flags, const char *name, |
| uint64_t min, uint64_t max) |
| { |
| struct drm_property *property; |
| |
| property = drm_property_create(dev, flags, name, 2); |
| if (!property) |
| return NULL; |
| |
| property->values[0] = min; |
| property->values[1] = max; |
| |
| return property; |
| } |
| |
| /** |
| * drm_property_create_range - create a new unsigned ranged property type |
| * @dev: drm device |
| * @flags: flags specifying the property type |
| * @name: name of the property |
| * @min: minimum value of the property |
| * @max: maximum value of the property |
| * |
| * This creates a new generic drm property which can then be attached to a drm |
| * object with drm_object_attach_property. The returned property object must be |
| * freed with drm_property_destroy. |
| * |
| * Userspace is allowed to set any unsigned integer value in the (min, max) |
| * range inclusive. |
| * |
| * Returns: |
| * A pointer to the newly created property on success, NULL on failure. |
| */ |
| struct drm_property *drm_property_create_range(struct drm_device *dev, int flags, |
| const char *name, |
| uint64_t min, uint64_t max) |
| { |
| return property_create_range(dev, DRM_MODE_PROP_RANGE | flags, |
| name, min, max); |
| } |
| EXPORT_SYMBOL(drm_property_create_range); |
| |
| /** |
| * drm_property_create_signed_range - create a new signed ranged property type |
| * @dev: drm device |
| * @flags: flags specifying the property type |
| * @name: name of the property |
| * @min: minimum value of the property |
| * @max: maximum value of the property |
| * |
| * This creates a new generic drm property which can then be attached to a drm |
| * object with drm_object_attach_property. The returned property object must be |
| * freed with drm_property_destroy. |
| * |
| * Userspace is allowed to set any signed integer value in the (min, max) |
| * range inclusive. |
| * |
| * Returns: |
| * A pointer to the newly created property on success, NULL on failure. |
| */ |
| struct drm_property *drm_property_create_signed_range(struct drm_device *dev, |
| int flags, const char *name, |
| int64_t min, int64_t max) |
| { |
| return property_create_range(dev, DRM_MODE_PROP_SIGNED_RANGE | flags, |
| name, I642U64(min), I642U64(max)); |
| } |
| EXPORT_SYMBOL(drm_property_create_signed_range); |
| |
| /** |
| * drm_property_create_object - create a new object property type |
| * @dev: drm device |
| * @flags: flags specifying the property type |
| * @name: name of the property |
| * @type: object type from DRM_MODE_OBJECT_* defines |
| * |
| * This creates a new generic drm property which can then be attached to a drm |
| * object with drm_object_attach_property. The returned property object must be |
| * freed with drm_property_destroy. |
| * |
| * Userspace is only allowed to set this to any property value of the given |
| * @type. Only useful for atomic properties, which is enforced. |
| * |
| * Returns: |
| * A pointer to the newly created property on success, NULL on failure. |
| */ |
| struct drm_property *drm_property_create_object(struct drm_device *dev, |
| int flags, const char *name, uint32_t type) |
| { |
| struct drm_property *property; |
| |
| flags |= DRM_MODE_PROP_OBJECT; |
| |
| if (WARN_ON(!(flags & DRM_MODE_PROP_ATOMIC))) |
| return NULL; |
| |
| property = drm_property_create(dev, flags, name, 1); |
| if (!property) |
| return NULL; |
| |
| property->values[0] = type; |
| |
| return property; |
| } |
| EXPORT_SYMBOL(drm_property_create_object); |
| |
| /** |
| * drm_property_create_bool - create a new boolean property type |
| * @dev: drm device |
| * @flags: flags specifying the property type |
| * @name: name of the property |
| * |
| * This creates a new generic drm property which can then be attached to a drm |
| * object with drm_object_attach_property. The returned property object must be |
| * freed with drm_property_destroy. |
| * |
| * This is implemented as a ranged property with only {0, 1} as valid values. |
| * |
| * Returns: |
| * A pointer to the newly created property on success, NULL on failure. |
| */ |
| struct drm_property *drm_property_create_bool(struct drm_device *dev, int flags, |
| const char *name) |
| { |
| return drm_property_create_range(dev, flags, name, 0, 1); |
| } |
| EXPORT_SYMBOL(drm_property_create_bool); |
| |
| /** |
| * drm_property_add_enum - add a possible value to an enumeration property |
| * @property: enumeration property to change |
| * @index: index of the new enumeration |
| * @value: value of the new enumeration |
| * @name: symbolic name of the new enumeration |
| * |
| * This functions adds enumerations to a property. |
| * |
| * It's use is deprecated, drivers should use one of the more specific helpers |
| * to directly create the property with all enumerations already attached. |
| * |
| * Returns: |
| * Zero on success, error code on failure. |
| */ |
| int drm_property_add_enum(struct drm_property *property, int index, |
| uint64_t value, const char *name) |
| { |
| struct drm_property_enum *prop_enum; |
| |
| if (!(drm_property_type_is(property, DRM_MODE_PROP_ENUM) || |
| drm_property_type_is(property, DRM_MODE_PROP_BITMASK))) |
| return -EINVAL; |
| |
| /* |
| * Bitmask enum properties have the additional constraint of values |
| * from 0 to 63 |
| */ |
| if (drm_property_type_is(property, DRM_MODE_PROP_BITMASK) && |
| (value > 63)) |
| return -EINVAL; |
| |
| if (!list_empty(&property->enum_list)) { |
| list_for_each_entry(prop_enum, &property->enum_list, head) { |
| if (prop_enum->value == value) { |
| strncpy(prop_enum->name, name, DRM_PROP_NAME_LEN); |
| prop_enum->name[DRM_PROP_NAME_LEN-1] = '\0'; |
| return 0; |
| } |
| } |
| } |
| |
| prop_enum = kzalloc(sizeof(struct drm_property_enum), GFP_KERNEL); |
| if (!prop_enum) |
| return -ENOMEM; |
| |
| strncpy(prop_enum->name, name, DRM_PROP_NAME_LEN); |
| prop_enum->name[DRM_PROP_NAME_LEN-1] = '\0'; |
| prop_enum->value = value; |
| |
| property->values[index] = value; |
| list_add_tail(&prop_enum->head, &property->enum_list); |
| return 0; |
| } |
| EXPORT_SYMBOL(drm_property_add_enum); |
| |
| /** |
| * drm_property_destroy - destroy a drm property |
| * @dev: drm device |
| * @property: property to destry |
| * |
| * This function frees a property including any attached resources like |
| * enumeration values. |
| */ |
| void drm_property_destroy(struct drm_device *dev, struct drm_property *property) |
| { |
| struct drm_property_enum *prop_enum, *pt; |
| |
| list_for_each_entry_safe(prop_enum, pt, &property->enum_list, head) { |
| list_del(&prop_enum->head); |
| kfree(prop_enum); |
| } |
| |
| if (property->num_values) |
| kfree(property->values); |
| drm_mode_object_put(dev, &property->base); |
| list_del(&property->head); |
| kfree(property); |
| } |
| EXPORT_SYMBOL(drm_property_destroy); |
| |
| /** |
| * drm_object_attach_property - attach a property to a modeset object |
| * @obj: drm modeset object |
| * @property: property to attach |
| * @init_val: initial value of the property |
| * |
| * This attaches the given property to the modeset object with the given initial |
| * value. Currently this function cannot fail since the properties are stored in |
| * a statically sized array. |
| */ |
| void drm_object_attach_property(struct drm_mode_object *obj, |
| struct drm_property *property, |
| uint64_t init_val) |
| { |
| int count = obj->properties->count; |
| |
| if (count == DRM_OBJECT_MAX_PROPERTY) { |
| WARN(1, "Failed to attach object property (type: 0x%x). Please " |
| "increase DRM_OBJECT_MAX_PROPERTY by 1 for each time " |
| "you see this message on the same object type.\n", |
| obj->type); |
| return; |
| } |
| |
| obj->properties->properties[count] = property; |
| obj->properties->values[count] = init_val; |
| obj->properties->count++; |
| if (property->flags & DRM_MODE_PROP_ATOMIC) |
| obj->properties->atomic_count++; |
| } |
| EXPORT_SYMBOL(drm_object_attach_property); |
| |
| /** |
| * drm_object_property_set_value - set the value of a property |
| * @obj: drm mode object to set property value for |
| * @property: property to set |
| * @val: value the property should be set to |
| * |
| * This functions sets a given property on a given object. This function only |
| * changes the software state of the property, it does not call into the |
| * driver's ->set_property callback. |
| * |
| * Returns: |
| * Zero on success, error code on failure. |
| */ |
| int drm_object_property_set_value(struct drm_mode_object *obj, |
| struct drm_property *property, uint64_t val) |
| { |
| int i; |
| |
| for (i = 0; i < obj->properties->count; i++) { |
| if (obj->properties->properties[i] == property) { |
| obj->properties->values[i] = val; |
| return 0; |
| } |
| } |
| |
| return -EINVAL; |
| } |
| EXPORT_SYMBOL(drm_object_property_set_value); |
| |
| /** |
| * drm_object_property_get_value - retrieve the value of a property |
| * @obj: drm mode object to get property value from |
| * @property: property to retrieve |
| * @val: storage for the property value |
| * |
| * This function retrieves the softare state of the given property for the given |
| * property. Since there is no driver callback to retrieve the current property |
| * value this might be out of sync with the hardware, depending upon the driver |
| * and property. |
| * |
| * Returns: |
| * Zero on success, error code on failure. |
| */ |
| int drm_object_property_get_value(struct drm_mode_object *obj, |
| struct drm_property *property, uint64_t *val) |
| { |
| int i; |
| |
| /* read-only properties bypass atomic mechanism and still store |
| * their value in obj->properties->values[].. mostly to avoid |
| * having to deal w/ EDID and similar props in atomic paths: |
| */ |
| if (drm_core_check_feature(property->dev, DRIVER_ATOMIC) && |
| !(property->flags & DRM_MODE_PROP_IMMUTABLE)) |
| return drm_atomic_get_property(obj, property, val); |
| |
| for (i = 0; i < obj->properties->count; i++) { |
| if (obj->properties->properties[i] == property) { |
| *val = obj->properties->values[i]; |
| return 0; |
| } |
| } |
| |
| return -EINVAL; |
| } |
| EXPORT_SYMBOL(drm_object_property_get_value); |
| |
| /** |
| * drm_mode_getproperty_ioctl - get the property metadata |
| * @dev: DRM device |
| * @data: ioctl data |
| * @file_priv: DRM file info |
| * |
| * This function retrieves the metadata for a given property, like the different |
| * possible values for an enum property or the limits for a range property. |
| * |
| * Blob properties are special |
| * |
| * Called by the user via ioctl. |
| * |
| * Returns: |
| * Zero on success, negative errno on failure. |
| */ |
| int drm_mode_getproperty_ioctl(struct drm_device *dev, |
| void *data, struct drm_file *file_priv) |
| { |
| struct drm_mode_get_property *out_resp = data; |
| struct drm_property *property; |
| int enum_count = 0; |
| int value_count = 0; |
| int ret = 0, i; |
| int copied; |
| struct drm_property_enum *prop_enum; |
| struct drm_mode_property_enum __user *enum_ptr; |
| uint64_t __user *values_ptr; |
| |
| if (!drm_core_check_feature(dev, DRIVER_MODESET)) |
| return -EINVAL; |
| |
| drm_modeset_lock_all(dev); |
| property = drm_property_find(dev, out_resp->prop_id); |
| if (!property) { |
| ret = -ENOENT; |
| goto done; |
| } |
| |
| if (drm_property_type_is(property, DRM_MODE_PROP_ENUM) || |
| drm_property_type_is(property, DRM_MODE_PROP_BITMASK)) { |
| list_for_each_entry(prop_enum, &property->enum_list, head) |
| enum_count++; |
| } |
| |
| value_count = property->num_values; |
| |
| strncpy(out_resp->name, property->name, DRM_PROP_NAME_LEN); |
| out_resp->name[DRM_PROP_NAME_LEN-1] = 0; |
| out_resp->flags = property->flags; |
| |
| if ((out_resp->count_values >= value_count) && value_count) { |
| values_ptr = (uint64_t __user *)(unsigned long)out_resp->values_ptr; |
| for (i = 0; i < value_count; i++) { |
| if (copy_to_user(values_ptr + i, &property->values[i], sizeof(uint64_t))) { |
| ret = -EFAULT; |
| goto done; |
| } |
| } |
| } |
| out_resp->count_values = value_count; |
| |
| if (drm_property_type_is(property, DRM_MODE_PROP_ENUM) || |
| drm_property_type_is(property, DRM_MODE_PROP_BITMASK)) { |
| if ((out_resp->count_enum_blobs >= enum_count) && enum_count) { |
| copied = 0; |
| enum_ptr = (struct drm_mode_property_enum __user *)(unsigned long)out_resp->enum_blob_ptr; |
| list_for_each_entry(prop_enum, &property->enum_list, head) { |
| |
| if (copy_to_user(&enum_ptr[copied].value, &prop_enum->value, sizeof(uint64_t))) { |
| ret = -EFAULT; |
| goto done; |
| } |
| |
| if (copy_to_user(&enum_ptr[copied].name, |
| &prop_enum->name, DRM_PROP_NAME_LEN)) { |
| ret = -EFAULT; |
| goto done; |
| } |
| copied++; |
| } |
| } |
| out_resp->count_enum_blobs = enum_count; |
| } |
| |
| /* |
| * NOTE: The idea seems to have been to use this to read all the blob |
| * property values. But nothing ever added them to the corresponding |
| * list, userspace always used the special-purpose get_blob ioctl to |
| * read the value for a blob property. It also doesn't make a lot of |
| * sense to return values here when everything else is just metadata for |
| * the property itself. |
| */ |
| if (drm_property_type_is(property, DRM_MODE_PROP_BLOB)) |
| out_resp->count_enum_blobs = 0; |
| done: |
| drm_modeset_unlock_all(dev); |
| return ret; |
| } |
| |
| static struct drm_property_blob * |
| drm_property_create_blob(struct drm_device *dev, size_t length, |
| const void *data) |
| { |
| struct drm_property_blob *blob; |
| int ret; |
| |
| if (!length || !data) |
| return NULL; |
| |
| blob = kzalloc(sizeof(struct drm_property_blob)+length, GFP_KERNEL); |
| if (!blob) |
| return NULL; |
| |
| ret = drm_mode_object_get(dev, &blob->base, DRM_MODE_OBJECT_BLOB); |
| if (ret) { |
| kfree(blob); |
| return NULL; |
| } |
| |
| blob->length = length; |
| |
| memcpy(blob->data, data, length); |
| |
| list_add_tail(&blob->head, &dev->mode_config.property_blob_list); |
| return blob; |
| } |
| |
| static void drm_property_destroy_blob(struct drm_device *dev, |
| struct drm_property_blob *blob) |
| { |
| drm_mode_object_put(dev, &blob->base); |
| list_del(&blob->head); |
| kfree(blob); |
| } |
| |
| /** |
| * drm_mode_getblob_ioctl - get the contents of a blob property value |
| * @dev: DRM device |
| * @data: ioctl data |
| * @file_priv: DRM file info |
| * |
| * This function retrieves the contents of a blob property. The value stored in |
| * an object's blob property is just a normal modeset object id. |
| * |
| * Called by the user via ioctl. |
| * |
| * Returns: |
| * Zero on success, negative errno on failure. |
| */ |
| int drm_mode_getblob_ioctl(struct drm_device *dev, |
| void *data, struct drm_file *file_priv) |
| { |
| struct drm_mode_get_blob *out_resp = data; |
| struct drm_property_blob *blob; |
| int ret = 0; |
| void __user *blob_ptr; |
| |
| if (!drm_core_check_feature(dev, DRIVER_MODESET)) |
| return -EINVAL; |
| |
| drm_modeset_lock_all(dev); |
| blob = drm_property_blob_find(dev, out_resp->blob_id); |
| if (!blob) { |
| ret = -ENOENT; |
| goto done; |
| } |
| |
| if (out_resp->length == blob->length) { |
| blob_ptr = (void __user *)(unsigned long)out_resp->data; |
| if (copy_to_user(blob_ptr, blob->data, blob->length)) { |
| ret = -EFAULT; |
| goto done; |
| } |
| } |
| out_resp->length = blob->length; |
| |
| done: |
| drm_modeset_unlock_all(dev); |
| return ret; |
| } |
| |
| /** |
| * drm_mode_connector_set_path_property - set tile property on connector |
| * @connector: connector to set property on. |
| * @path: path to use for property. |
| * |
| * This creates a property to expose to userspace to specify a |
| * connector path. This is mainly used for DisplayPort MST where |
| * connectors have a topology and we want to allow userspace to give |
| * them more meaningful names. |
| * |
| * Returns: |
| * Zero on success, negative errno on failure. |
| */ |
| int drm_mode_connector_set_path_property(struct drm_connector *connector, |
| const char *path) |
| { |
| struct drm_device *dev = connector->dev; |
| size_t size = strlen(path) + 1; |
| int ret; |
| |
| connector->path_blob_ptr = drm_property_create_blob(connector->dev, |
| size, path); |
| if (!connector->path_blob_ptr) |
| return -EINVAL; |
| |
| ret = drm_object_property_set_value(&connector->base, |
| dev->mode_config.path_property, |
| connector->path_blob_ptr->base.id); |
| return ret; |
| } |
| EXPORT_SYMBOL(drm_mode_connector_set_path_property); |
| |
| /** |
| * drm_mode_connector_set_tile_property - set tile property on connector |
| * @connector: connector to set property on. |
| * |
| * This looks up the tile information for a connector, and creates a |
| * property for userspace to parse if it exists. The property is of |
| * the form of 8 integers using ':' as a separator. |
| * |
| * Returns: |
| * Zero on success, errno on failure. |
| */ |
| int drm_mode_connector_set_tile_property(struct drm_connector *connector) |
| { |
| struct drm_device *dev = connector->dev; |
| int ret, size; |
| char tile[256]; |
| |
| if (connector->tile_blob_ptr) |
| drm_property_destroy_blob(dev, connector->tile_blob_ptr); |
| |
| if (!connector->has_tile) { |
| connector->tile_blob_ptr = NULL; |
| ret = drm_object_property_set_value(&connector->base, |
| dev->mode_config.tile_property, 0); |
| return ret; |
| } |
| |
| snprintf(tile, 256, "%d:%d:%d:%d:%d:%d:%d:%d", |
| connector->tile_group->id, connector->tile_is_single_monitor, |
| connector->num_h_tile, connector->num_v_tile, |
| connector->tile_h_loc, connector->tile_v_loc, |
| connector->tile_h_size, connector->tile_v_size); |
| size = strlen(tile) + 1; |
| |
| connector->tile_blob_ptr = drm_property_create_blob(connector->dev, |
| size, tile); |
| if (!connector->tile_blob_ptr) |
| return -EINVAL; |
| |
| ret = drm_object_property_set_value(&connector->base, |
| dev->mode_config.tile_property, |
| connector->tile_blob_ptr->base.id); |
| return ret; |
| } |
| EXPORT_SYMBOL(drm_mode_connector_set_tile_property); |
| |
| /** |
| * drm_mode_connector_update_edid_property - update the edid property of a connector |
| * @connector: drm connector |
| * @edid: new value of the edid property |
| * |
| * This function creates a new blob modeset object and assigns its id to the |
| * connector's edid property. |
| * |
| * Returns: |
| * Zero on success, negative errno on failure. |
| */ |
| int drm_mode_connector_update_edid_property(struct drm_connector *connector, |
| const struct edid *edid) |
| { |
| struct drm_device *dev = connector->dev; |
| size_t size; |
| int ret; |
| |
| /* ignore requests to set edid when overridden */ |
| if (connector->override_edid) |
| return 0; |
| |
| if (connector->edid_blob_ptr) |
| drm_property_destroy_blob(dev, connector->edid_blob_ptr); |
| |
| /* Delete edid, when there is none. */ |
| if (!edid) { |
| connector->edid_blob_ptr = NULL; |
| ret = drm_object_property_set_value(&connector->base, dev->mode_config.edid_property, 0); |
| return ret; |
| } |
| |
| size = EDID_LENGTH * (1 + edid->extensions); |
| connector->edid_blob_ptr = drm_property_create_blob(connector->dev, |
| size, edid); |
| if (!connector->edid_blob_ptr) |
| return -EINVAL; |
| |
| ret = drm_object_property_set_value(&connector->base, |
| dev->mode_config.edid_property, |
| connector->edid_blob_ptr->base.id); |
| |
| return ret; |
| } |
| EXPORT_SYMBOL(drm_mode_connector_update_edid_property); |
| |
| /* Some properties could refer to dynamic refcnt'd objects, or things that |
| * need special locking to handle lifetime issues (ie. to ensure the prop |
| * value doesn't become invalid part way through the property update due to |
| * race). The value returned by reference via 'obj' should be passed back |
| * to drm_property_change_valid_put() after the property is set (and the |
| * object to which the property is attached has a chance to take it's own |
| * reference). |
| */ |
| bool drm_property_change_valid_get(struct drm_property *property, |
| uint64_t value, struct drm_mode_object **ref) |
| { |
| int i; |
| |
| if (property->flags & DRM_MODE_PROP_IMMUTABLE) |
| return false; |
| |
| *ref = NULL; |
| |
| if (drm_property_type_is(property, DRM_MODE_PROP_RANGE)) { |
| if (value < property->values[0] || value > property->values[1]) |
| return false; |
| return true; |
| } else if (drm_property_type_is(property, DRM_MODE_PROP_SIGNED_RANGE)) { |
| int64_t svalue = U642I64(value); |
| |
| if (svalue < U642I64(property->values[0]) || |
| svalue > U642I64(property->values[1])) |
| return false; |
| return true; |
| } else if (drm_property_type_is(property, DRM_MODE_PROP_BITMASK)) { |
| uint64_t valid_mask = 0; |
| |
| for (i = 0; i < property->num_values; i++) |
| valid_mask |= (1ULL << property->values[i]); |
| return !(value & ~valid_mask); |
| } else if (drm_property_type_is(property, DRM_MODE_PROP_BLOB)) { |
| /* Only the driver knows */ |
| return true; |
| } else if (drm_property_type_is(property, DRM_MODE_PROP_OBJECT)) { |
| /* a zero value for an object property translates to null: */ |
| if (value == 0) |
| return true; |
| |
| /* handle refcnt'd objects specially: */ |
| if (property->values[0] == DRM_MODE_OBJECT_FB) { |
| struct drm_framebuffer *fb; |
| fb = drm_framebuffer_lookup(property->dev, value); |
| if (fb) { |
| *ref = &fb->base; |
| return true; |
| } else { |
| return false; |
| } |
| } else { |
| return _object_find(property->dev, value, property->values[0]) != NULL; |
| } |
| } |
| |
| for (i = 0; i < property->num_values; i++) |
| if (property->values[i] == value) |
| return true; |
| return false; |
| } |
| |
| void drm_property_change_valid_put(struct drm_property *property, |
| struct drm_mode_object *ref) |
| { |
| if (!ref) |
| return; |
| |
| if (drm_property_type_is(property, DRM_MODE_PROP_OBJECT)) { |
| if (property->values[0] == DRM_MODE_OBJECT_FB) |
| drm_framebuffer_unreference(obj_to_fb(ref)); |
| } |
| } |
| |
| /** |
| * drm_mode_connector_property_set_ioctl - set the current value of a connector property |
| * @dev: DRM device |
| * @data: ioctl data |
| * @file_priv: DRM file info |
| * |
| * This function sets the current value for a connectors's property. It also |
| * calls into a driver's ->set_property callback to update the hardware state |
| * |
| * Called by the user via ioctl. |
| * |
| * Returns: |
| * Zero on success, negative errno on failure. |
| */ |
| int drm_mode_connector_property_set_ioctl(struct drm_device *dev, |
| void *data, struct drm_file *file_priv) |
| { |
| struct drm_mode_connector_set_property *conn_set_prop = data; |
| struct drm_mode_obj_set_property obj_set_prop = { |
| .value = conn_set_prop->value, |
| .prop_id = conn_set_prop->prop_id, |
| .obj_id = conn_set_prop->connector_id, |
| .obj_type = DRM_MODE_OBJECT_CONNECTOR |
| }; |
| |
| /* It does all the locking and checking we need */ |
| return drm_mode_obj_set_property_ioctl(dev, &obj_set_prop, file_priv); |
| } |
| |
| static int drm_mode_connector_set_obj_prop(struct drm_mode_object *obj, |
| struct drm_property *property, |
| uint64_t value) |
| { |
| int ret = -EINVAL; |
| struct drm_connector *connector = obj_to_connector(obj); |
| |
| /* Do DPMS ourselves */ |
| if (property == connector->dev->mode_config.dpms_property) { |
| if (connector->funcs->dpms) |
| (*connector->funcs->dpms)(connector, (int)value); |
| ret = 0; |
| } else if (connector->funcs->set_property) |
| ret = connector->funcs->set_property(connector, property, value); |
| |
| /* store the property value if successful */ |
| if (!ret) |
| drm_object_property_set_value(&connector->base, property, value); |
| return ret; |
| } |
| |
| static int drm_mode_crtc_set_obj_prop(struct drm_mode_object *obj, |
| struct drm_property *property, |
| uint64_t value) |
| { |
| int ret = -EINVAL; |
| struct drm_crtc *crtc = obj_to_crtc(obj); |
| |
| if (crtc->funcs->set_property) |
| ret = crtc->funcs->set_property(crtc, property, value); |
| if (!ret) |
| drm_object_property_set_value(obj, property, value); |
| |
| return ret; |
| } |
| |
| /** |
| * drm_mode_plane_set_obj_prop - set the value of a property |
| * @plane: drm plane object to set property value for |
| * @property: property to set |
| * @value: value the property should be set to |
| * |
| * This functions sets a given property on a given plane object. This function |
| * calls the driver's ->set_property callback and changes the software state of |
| * the property if the callback succeeds. |
| * |
| * Returns: |
| * Zero on success, error code on failure. |
| */ |
| int drm_mode_plane_set_obj_prop(struct drm_plane *plane, |
| struct drm_property *property, |
| uint64_t value) |
| { |
| int ret = -EINVAL; |
| struct drm_mode_object *obj = &plane->base; |
| |
| if (plane->funcs->set_property) |
| ret = plane->funcs->set_property(plane, property, value); |
| if (!ret) |
| drm_object_property_set_value(obj, property, value); |
| |
| return ret; |
| } |
| EXPORT_SYMBOL(drm_mode_plane_set_obj_prop); |
| |
| /** |
| * drm_mode_obj_get_properties_ioctl - get the current value of a object's property |
| * @dev: DRM device |
| * @data: ioctl data |
| * @file_priv: DRM file info |
| * |
| * This function retrieves the current value for an object's property. Compared |
| * to the connector specific ioctl this one is extended to also work on crtc and |
| * plane objects. |
| * |
| * Called by the user via ioctl. |
| * |
| * Returns: |
| * Zero on success, negative errno on failure. |
| */ |
| int drm_mode_obj_get_properties_ioctl(struct drm_device *dev, void *data, |
| struct drm_file *file_priv) |
| { |
| struct drm_mode_obj_get_properties *arg = data; |
| struct drm_mode_object *obj; |
| int ret = 0; |
| |
| if (!drm_core_check_feature(dev, DRIVER_MODESET)) |
| return -EINVAL; |
| |
| drm_modeset_lock_all(dev); |
| |
| obj = drm_mode_object_find(dev, arg->obj_id, arg->obj_type); |
| if (!obj) { |
| ret = -ENOENT; |
| goto out; |
| } |
| if (!obj->properties) { |
| ret = -EINVAL; |
| goto out; |
| } |
| |
| ret = get_properties(obj, file_priv->atomic, |
| (uint32_t __user *)(unsigned long)(arg->props_ptr), |
| (uint64_t __user *)(unsigned long)(arg->prop_values_ptr), |
| &arg->count_props); |
| |
| out: |
| drm_modeset_unlock_all(dev); |
| return ret; |
| } |
| |
| /** |
| * drm_mode_obj_set_property_ioctl - set the current value of an object's property |
| * @dev: DRM device |
| * @data: ioctl data |
| * @file_priv: DRM file info |
| * |
| * This function sets the current value for an object's property. It also calls |
| * into a driver's ->set_property callback to update the hardware state. |
| * Compared to the connector specific ioctl this one is extended to also work on |
| * crtc and plane objects. |
| * |
| * Called by the user via ioctl. |
| * |
| * Returns: |
| * Zero on success, negative errno on failure. |
| */ |
| int drm_mode_obj_set_property_ioctl(struct drm_device *dev, void *data, |
| struct drm_file *file_priv) |
| { |
| struct drm_mode_obj_set_property *arg = data; |
| struct drm_mode_object *arg_obj; |
| struct drm_mode_object *prop_obj; |
| struct drm_property *property; |
| int i, ret = -EINVAL; |
| struct drm_mode_object *ref; |
| |
| if (!drm_core_check_feature(dev, DRIVER_MODESET)) |
| return -EINVAL; |
| |
| drm_modeset_lock_all(dev); |
| |
| arg_obj = drm_mode_object_find(dev, arg->obj_id, arg->obj_type); |
| if (!arg_obj) { |
| ret = -ENOENT; |
| goto out; |
| } |
| if (!arg_obj->properties) |
| goto out; |
| |
| for (i = 0; i < arg_obj->properties->count; i++) |
| if (arg_obj->properties->properties[i]->base.id == arg->prop_id) |
| break; |
| |
| if (i == arg_obj->properties->count) |
| goto out; |
| |
| prop_obj = drm_mode_object_find(dev, arg->prop_id, |
| DRM_MODE_OBJECT_PROPERTY); |
| if (!prop_obj) { |
| ret = -ENOENT; |
| goto out; |
| } |
| property = obj_to_property(prop_obj); |
| |
| if (!drm_property_change_valid_get(property, arg->value, &ref)) |
| goto out; |
| |
| switch (arg_obj->type) { |
| case DRM_MODE_OBJECT_CONNECTOR: |
| ret = drm_mode_connector_set_obj_prop(arg_obj, property, |
| arg->value); |
| break; |
| case DRM_MODE_OBJECT_CRTC: |
| ret = drm_mode_crtc_set_obj_prop(arg_obj, property, arg->value); |
| break; |
| case DRM_MODE_OBJECT_PLANE: |
| ret = drm_mode_plane_set_obj_prop(obj_to_plane(arg_obj), |
| property, arg->value); |
| break; |
| } |
| |
| drm_property_change_valid_put(property, ref); |
| |
| out: |
| drm_modeset_unlock_all(dev); |
| return ret; |
| } |
| |
| /** |
| * drm_mode_connector_attach_encoder - attach a connector to an encoder |
| * @connector: connector to attach |
| * @encoder: encoder to attach @connector to |
| * |
| * This function links up a connector to an encoder. Note that the routing |
| * restrictions between encoders and crtcs are exposed to userspace through the |
| * possible_clones and possible_crtcs bitmasks. |
| * |
| * Returns: |
| * Zero on success, negative errno on failure. |
| */ |
| int drm_mode_connector_attach_encoder(struct drm_connector *connector, |
| struct drm_encoder *encoder) |
| { |
| int i; |
| |
| for (i = 0; i < DRM_CONNECTOR_MAX_ENCODER; i++) { |
| if (connector->encoder_ids[i] == 0) { |
| connector->encoder_ids[i] = encoder->base.id; |
| return 0; |
| } |
| } |
| return -ENOMEM; |
| } |
| EXPORT_SYMBOL(drm_mode_connector_attach_encoder); |
| |
| /** |
| * drm_mode_crtc_set_gamma_size - set the gamma table size |
| * @crtc: CRTC to set the gamma table size for |
| * @gamma_size: size of the gamma table |
| * |
| * Drivers which support gamma tables should set this to the supported gamma |
| * table size when initializing the CRTC. Currently the drm core only supports a |
| * fixed gamma table size. |
| * |
| * Returns: |
| * Zero on success, negative errno on failure. |
| */ |
| int drm_mode_crtc_set_gamma_size(struct drm_crtc *crtc, |
| int gamma_size) |
| { |
| crtc->gamma_size = gamma_size; |
| |
| crtc->gamma_store = kcalloc(gamma_size, sizeof(uint16_t) * 3, |
| GFP_KERNEL); |
| if (!crtc->gamma_store) { |
| crtc->gamma_size = 0; |
| return -ENOMEM; |
| } |
| |
| return 0; |
| } |
| EXPORT_SYMBOL(drm_mode_crtc_set_gamma_size); |
| |
| /** |
| * drm_mode_gamma_set_ioctl - set the gamma table |
| * @dev: DRM device |
| * @data: ioctl data |
| * @file_priv: DRM file info |
| * |
| * Set the gamma table of a CRTC to the one passed in by the user. Userspace can |
| * inquire the required gamma table size through drm_mode_gamma_get_ioctl. |
| * |
| * Called by the user via ioctl. |
| * |
| * Returns: |
| * Zero on success, negative errno on failure. |
| */ |
| int drm_mode_gamma_set_ioctl(struct drm_device *dev, |
| void *data, struct drm_file *file_priv) |
| { |
| struct drm_mode_crtc_lut *crtc_lut = data; |
| struct drm_crtc *crtc; |
| void *r_base, *g_base, *b_base; |
| int size; |
| int ret = 0; |
| |
| if (!drm_core_check_feature(dev, DRIVER_MODESET)) |
| return -EINVAL; |
| |
| drm_modeset_lock_all(dev); |
| crtc = drm_crtc_find(dev, crtc_lut->crtc_id); |
| if (!crtc) { |
| ret = -ENOENT; |
| goto out; |
| } |
| |
| if (crtc->funcs->gamma_set == NULL) { |
| ret = -ENOSYS; |
| goto out; |
| } |
| |
| /* memcpy into gamma store */ |
| if (crtc_lut->gamma_size != crtc->gamma_size) { |
| ret = -EINVAL; |
| goto out; |
| } |
| |
| size = crtc_lut->gamma_size * (sizeof(uint16_t)); |
| r_base = crtc->gamma_store; |
| if (copy_from_user(r_base, (void __user *)(unsigned long)crtc_lut->red, size)) { |
| ret = -EFAULT; |
| goto out; |
| } |
| |
| g_base = r_base + size; |
| if (copy_from_user(g_base, (void __user *)(unsigned long)crtc_lut->green, size)) { |
| ret = -EFAULT; |
| goto out; |
| } |
| |
| b_base = g_base + size; |
| if (copy_from_user(b_base, (void __user *)(unsigned long)crtc_lut->blue, size)) { |
| ret = -EFAULT; |
| goto out; |
| } |
| |
| crtc->funcs->gamma_set(crtc, r_base, g_base, b_base, 0, crtc->gamma_size); |
| |
| out: |
| drm_modeset_unlock_all(dev); |
| return ret; |
| |
| } |
| |
| /** |
| * drm_mode_gamma_get_ioctl - get the gamma table |
| * @dev: DRM device |
| * @data: ioctl data |
| * @file_priv: DRM file info |
| * |
| * Copy the current gamma table into the storage provided. This also provides |
| * the gamma table size the driver expects, which can be used to size the |
| * allocated storage. |
| * |
| * Called by the user via ioctl. |
| * |
| * Returns: |
| * Zero on success, negative errno on failure. |
| */ |
| int drm_mode_gamma_get_ioctl(struct drm_device *dev, |
| void *data, struct drm_file *file_priv) |
| { |
| struct drm_mode_crtc_lut *crtc_lut = data; |
| struct drm_crtc *crtc; |
| void *r_base, *g_base, *b_base; |
| int size; |
| int ret = 0; |
| |
| if (!drm_core_check_feature(dev, DRIVER_MODESET)) |
| return -EINVAL; |
| |
| drm_modeset_lock_all(dev); |
| crtc = drm_crtc_find(dev, crtc_lut->crtc_id); |
| if (!crtc) { |
| ret = -ENOENT; |
| goto out; |
| } |
| |
| /* memcpy into gamma store */ |
| if (crtc_lut->gamma_size != crtc->gamma_size) { |
| ret = -EINVAL; |
| goto out; |
| } |
| |
| size = crtc_lut->gamma_size * (sizeof(uint16_t)); |
| r_base = crtc->gamma_store; |
| if (copy_to_user((void __user *)(unsigned long)crtc_lut->red, r_base, size)) { |
| ret = -EFAULT; |
| goto out; |
| } |
| |
| g_base = r_base + size; |
| if (copy_to_user((void __user *)(unsigned long)crtc_lut->green, g_base, size)) { |
| ret = -EFAULT; |
| goto out; |
| } |
| |
| b_base = g_base + size; |
| if (copy_to_user((void __user *)(unsigned long)crtc_lut->blue, b_base, size)) { |
| ret = -EFAULT; |
| goto out; |
| } |
| out: |
| drm_modeset_unlock_all(dev); |
| return ret; |
| } |
| |
| /** |
| * drm_mode_page_flip_ioctl - schedule an asynchronous fb update |
| * @dev: DRM device |
| * @data: ioctl data |
| * @file_priv: DRM file info |
| * |
| * This schedules an asynchronous update on a given CRTC, called page flip. |
| * Optionally a drm event is generated to signal the completion of the event. |
| * Generic drivers cannot assume that a pageflip with changed framebuffer |
| * properties (including driver specific metadata like tiling layout) will work, |
| * but some drivers support e.g. pixel format changes through the pageflip |
| * ioctl. |
| * |
| * Called by the user via ioctl. |
| * |
| * Returns: |
| * Zero on success, negative errno on failure. |
| */ |
| int drm_mode_page_flip_ioctl(struct drm_device *dev, |
| void *data, struct drm_file *file_priv) |
| { |
| struct drm_mode_crtc_page_flip *page_flip = data; |
| struct drm_crtc *crtc; |
| struct drm_framebuffer *fb = NULL; |
| struct drm_pending_vblank_event *e = NULL; |
| unsigned long flags; |
| int ret = -EINVAL; |
| |
| if (page_flip->flags & ~DRM_MODE_PAGE_FLIP_FLAGS || |
| page_flip->reserved != 0) |
| return -EINVAL; |
| |
| if ((page_flip->flags & DRM_MODE_PAGE_FLIP_ASYNC) && !dev->mode_config.async_page_flip) |
| return -EINVAL; |
| |
| crtc = drm_crtc_find(dev, page_flip->crtc_id); |
| if (!crtc) |
| return -ENOENT; |
| |
| drm_modeset_lock_crtc(crtc, crtc->primary); |
| if (crtc->primary->fb == NULL) { |
| /* The framebuffer is currently unbound, presumably |
| * due to a hotplug event, that userspace has not |
| * yet discovered. |
| */ |
| ret = -EBUSY; |
| goto out; |
| } |
| |
| if (crtc->funcs->page_flip == NULL) |
| goto out; |
| |
| fb = drm_framebuffer_lookup(dev, page_flip->fb_id); |
| if (!fb) { |
| ret = -ENOENT; |
| goto out; |
| } |
| |
| ret = drm_crtc_check_viewport(crtc, crtc->x, crtc->y, &crtc->mode, fb); |
| if (ret) |
| goto out; |
| |
| if (crtc->primary->fb->pixel_format != fb->pixel_format) { |
| DRM_DEBUG_KMS("Page flip is not allowed to change frame buffer format.\n"); |
| ret = -EINVAL; |
| goto out; |
| } |
| |
| if (page_flip->flags & DRM_MODE_PAGE_FLIP_EVENT) { |
| ret = -ENOMEM; |
| spin_lock_irqsave(&dev->event_lock, flags); |
| if (file_priv->event_space < sizeof(e->event)) { |
| spin_unlock_irqrestore(&dev->event_lock, flags); |
| goto out; |
| } |
| file_priv->event_space -= sizeof(e->event); |
| spin_unlock_irqrestore(&dev->event_lock, flags); |
| |
| e = kzalloc(sizeof(*e), GFP_KERNEL); |
| if (e == NULL) { |
| spin_lock_irqsave(&dev->event_lock, flags); |
| file_priv->event_space += sizeof(e->event); |
| spin_unlock_irqrestore(&dev->event_lock, flags); |
| goto out; |
| } |
| |
| e->event.base.type = DRM_EVENT_FLIP_COMPLETE; |
| e->event.base.length = sizeof(e->event); |
| e->event.user_data = page_flip->user_data; |
| e->base.event = &e->event.base; |
| e->base.file_priv = file_priv; |
| e->base.destroy = |
| (void (*) (struct drm_pending_event *)) kfree; |
| } |
| |
| crtc->primary->old_fb = crtc->primary->fb; |
| ret = crtc->funcs->page_flip(crtc, fb, e, page_flip->flags); |
| if (ret) { |
| if (page_flip->flags & DRM_MODE_PAGE_FLIP_EVENT) { |
| spin_lock_irqsave(&dev->event_lock, flags); |
| file_priv->event_space += sizeof(e->event); |
| spin_unlock_irqrestore(&dev->event_lock, flags); |
| kfree(e); |
| } |
| /* Keep the old fb, don't unref it. */ |
| crtc->primary->old_fb = NULL; |
| } else { |
| /* |
| * Warn if the driver hasn't properly updated the crtc->fb |
| * field to reflect that the new framebuffer is now used. |
| * Failing to do so will screw with the reference counting |
| * on framebuffers. |
| */ |
| WARN_ON(crtc->primary->fb != fb); |
| /* Unref only the old framebuffer. */ |
| fb = NULL; |
| } |
| |
| out: |
| if (fb) |
| drm_framebuffer_unreference(fb); |
| if (crtc->primary->old_fb) |
| drm_framebuffer_unreference(crtc->primary->old_fb); |
| crtc->primary->old_fb = NULL; |
| drm_modeset_unlock_crtc(crtc); |
| |
| return ret; |
| } |
| |
| /** |
| * drm_mode_config_reset - call ->reset callbacks |
| * @dev: drm device |
| * |
| * This functions calls all the crtc's, encoder's and connector's ->reset |
| * callback. Drivers can use this in e.g. their driver load or resume code to |
| * reset hardware and software state. |
| */ |
| void drm_mode_config_reset(struct drm_device *dev) |
| { |
| struct drm_crtc *crtc; |
| struct drm_plane *plane; |
| struct drm_encoder *encoder; |
| struct drm_connector *connector; |
| |
| list_for_each_entry(plane, &dev->mode_config.plane_list, head) |
| if (plane->funcs->reset) |
| plane->funcs->reset(plane); |
| |
| list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) |
| if (crtc->funcs->reset) |
| crtc->funcs->reset(crtc); |
| |
| list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) |
| if (encoder->funcs->reset) |
| encoder->funcs->reset(encoder); |
| |
| list_for_each_entry(connector, &dev->mode_config.connector_list, head) { |
| connector->status = connector_status_unknown; |
| |
| if (connector->funcs->reset) |
| connector->funcs->reset(connector); |
| } |
| } |
| EXPORT_SYMBOL(drm_mode_config_reset); |
| |
| /** |
| * drm_mode_create_dumb_ioctl - create a dumb backing storage buffer |
| * @dev: DRM device |
| * @data: ioctl data |
| * @file_priv: DRM file info |
| * |
| * This creates a new dumb buffer in the driver's backing storage manager (GEM, |
| * TTM or something else entirely) and returns the resulting buffer handle. This |
| * handle can then be wrapped up into a framebuffer modeset object. |
| * |
| * Note that userspace is not allowed to use such objects for render |
| * acceleration - drivers must create their own private ioctls for such a use |
| * case. |
| * |
| * Called by the user via ioctl. |
| * |
| * Returns: |
| * Zero on success, negative errno on failure. |
| */ |
| int drm_mode_create_dumb_ioctl(struct drm_device *dev, |
| void *data, struct drm_file *file_priv) |
| { |
| struct drm_mode_create_dumb *args = data; |
| u32 cpp, stride, size; |
| |
| if (!dev->driver->dumb_create) |
| return -ENOSYS; |
| if (!args->width || !args->height || !args->bpp) |
| return -EINVAL; |
| |
| /* overflow checks for 32bit size calculations */ |
| /* NOTE: DIV_ROUND_UP() can overflow */ |
| cpp = DIV_ROUND_UP(args->bpp, 8); |
| if (!cpp || cpp > 0xffffffffU / args->width) |
| return -EINVAL; |
| stride = cpp * args->width; |
| if (args->height > 0xffffffffU / stride) |
| return -EINVAL; |
| |
| /* test for wrap-around */ |
| size = args->height * stride; |
| if (PAGE_ALIGN(size) == 0) |
| return -EINVAL; |
| |
| /* |
| * handle, pitch and size are output parameters. Zero them out to |
| * prevent drivers from accidentally using uninitialized data. Since |
| * not all existing userspace is clearing these fields properly we |
| * cannot reject IOCTL with garbage in them. |
| */ |
| args->handle = 0; |
| args->pitch = 0; |
| args->size = 0; |
| |
| return dev->driver->dumb_create(file_priv, dev, args); |
| } |
| |
| /** |
| * drm_mode_mmap_dumb_ioctl - create an mmap offset for a dumb backing storage buffer |
| * @dev: DRM device |
| * @data: ioctl data |
| * @file_priv: DRM file info |
| * |
| * Allocate an offset in the drm device node's address space to be able to |
| * memory map a dumb buffer. |
| * |
| * Called by the user via ioctl. |
| * |
| * Returns: |
| * Zero on success, negative errno on failure. |
| */ |
| int drm_mode_mmap_dumb_ioctl(struct drm_device *dev, |
| void *data, struct drm_file *file_priv) |
| { |
| struct drm_mode_map_dumb *args = data; |
| |
| /* call driver ioctl to get mmap offset */ |
| if (!dev->driver->dumb_map_offset) |
| return -ENOSYS; |
| |
| return dev->driver->dumb_map_offset(file_priv, dev, args->handle, &args->offset); |
| } |
| |
| /** |
| * drm_mode_destroy_dumb_ioctl - destroy a dumb backing strage buffer |
| * @dev: DRM device |
| * @data: ioctl data |
| * @file_priv: DRM file info |
| * |
| * This destroys the userspace handle for the given dumb backing storage buffer. |
| * Since buffer objects must be reference counted in the kernel a buffer object |
| * won't be immediately freed if a framebuffer modeset object still uses it. |
| * |
| * Called by the user via ioctl. |
| * |
| * Returns: |
| * Zero on success, negative errno on failure. |
| */ |
| int drm_mode_destroy_dumb_ioctl(struct drm_device *dev, |
| void *data, struct drm_file *file_priv) |
| { |
| struct drm_mode_destroy_dumb *args = data; |
| |
| if (!dev->driver->dumb_destroy) |
| return -ENOSYS; |
| |
| return dev->driver->dumb_destroy(file_priv, dev, args->handle); |
| } |
| |
| /** |
| * drm_fb_get_bpp_depth - get the bpp/depth values for format |
| * @format: pixel format (DRM_FORMAT_*) |
| * @depth: storage for the depth value |
| * @bpp: storage for the bpp value |
| * |
| * This only supports RGB formats here for compat with code that doesn't use |
| * pixel formats directly yet. |
| */ |
| void drm_fb_get_bpp_depth(uint32_t format, unsigned int *depth, |
| int *bpp) |
| { |
| switch (format) { |
| case DRM_FORMAT_C8: |
| case DRM_FORMAT_RGB332: |
| case DRM_FORMAT_BGR233: |
| *depth = 8; |
| *bpp = 8; |
| break; |
| case DRM_FORMAT_XRGB1555: |
| case DRM_FORMAT_XBGR1555: |
| case DRM_FORMAT_RGBX5551: |
| case DRM_FORMAT_BGRX5551: |
| case DRM_FORMAT_ARGB1555: |
| case DRM_FORMAT_ABGR1555: |
| case DRM_FORMAT_RGBA5551: |
| case DRM_FORMAT_BGRA5551: |
| *depth = 15; |
| *bpp = 16; |
| break; |
| case DRM_FORMAT_RGB565: |
| case DRM_FORMAT_BGR565: |
| *depth = 16; |
| *bpp = 16; |
| break; |
| case DRM_FORMAT_RGB888: |
| case DRM_FORMAT_BGR888: |
| *depth = 24; |
| *bpp = 24; |
| break; |
| case DRM_FORMAT_XRGB8888: |
| case DRM_FORMAT_XBGR8888: |
| case DRM_FORMAT_RGBX8888: |
| case DRM_FORMAT_BGRX8888: |
| *depth = 24; |
| *bpp = 32; |
| break; |
| case DRM_FORMAT_XRGB2101010: |
| case DRM_FORMAT_XBGR2101010: |
| case DRM_FORMAT_RGBX1010102: |
| case DRM_FORMAT_BGRX1010102: |
| case DRM_FORMAT_ARGB2101010: |
| case DRM_FORMAT_ABGR2101010: |
| case DRM_FORMAT_RGBA1010102: |
| case DRM_FORMAT_BGRA1010102: |
| *depth = 30; |
| *bpp = 32; |
| break; |
| case DRM_FORMAT_ARGB8888: |
| case DRM_FORMAT_ABGR8888: |
| case DRM_FORMAT_RGBA8888: |
| case DRM_FORMAT_BGRA8888: |
| *depth = 32; |
| *bpp = 32; |
| break; |
| default: |
| DRM_DEBUG_KMS("unsupported pixel format %s\n", |
| drm_get_format_name(format)); |
| *depth = 0; |
| *bpp = 0; |
| break; |
| } |
| } |
| EXPORT_SYMBOL(drm_fb_get_bpp_depth); |
| |
| /** |
| * drm_format_num_planes - get the number of planes for format |
| * @format: pixel format (DRM_FORMAT_*) |
| * |
| * Returns: |
| * The number of planes used by the specified pixel format. |
| */ |
| int drm_format_num_planes(uint32_t format) |
| { |
| switch (format) { |
| case DRM_FORMAT_YUV410: |
| case DRM_FORMAT_YVU410: |
| case DRM_FORMAT_YUV411: |
| case DRM_FORMAT_YVU411: |
| case DRM_FORMAT_YUV420: |
| case DRM_FORMAT_YVU420: |
| case DRM_FORMAT_YUV422: |
| case DRM_FORMAT_YVU422: |
| case DRM_FORMAT_YUV444: |
| case DRM_FORMAT_YVU444: |
| return 3; |
| case DRM_FORMAT_NV12: |
| case DRM_FORMAT_NV21: |
| case DRM_FORMAT_NV16: |
| case DRM_FORMAT_NV61: |
| case DRM_FORMAT_NV24: |
| case DRM_FORMAT_NV42: |
| return 2; |
| default: |
| return 1; |
| } |
| } |
| EXPORT_SYMBOL(drm_format_num_planes); |
| |
| /** |
| * drm_format_plane_cpp - determine the bytes per pixel value |
| * @format: pixel format (DRM_FORMAT_*) |
| * @plane: plane index |
| * |
| * Returns: |
| * The bytes per pixel value for the specified plane. |
| */ |
| int drm_format_plane_cpp(uint32_t format, int plane) |
| { |
| unsigned int depth; |
| int bpp; |
| |
| if (plane >= drm_format_num_planes(format)) |
| return 0; |
| |
| switch (format) { |
| case DRM_FORMAT_YUYV: |
| case DRM_FORMAT_YVYU: |
| case DRM_FORMAT_UYVY: |
| case DRM_FORMAT_VYUY: |
| return 2; |
| case DRM_FORMAT_NV12: |
| case DRM_FORMAT_NV21: |
| case DRM_FORMAT_NV16: |
| case DRM_FORMAT_NV61: |
| case DRM_FORMAT_NV24: |
| case DRM_FORMAT_NV42: |
| return plane ? 2 : 1; |
| case DRM_FORMAT_YUV410: |
| case DRM_FORMAT_YVU410: |
| case DRM_FORMAT_YUV411: |
| case DRM_FORMAT_YVU411: |
| case DRM_FORMAT_YUV420: |
| case DRM_FORMAT_YVU420: |
| case DRM_FORMAT_YUV422: |
| case DRM_FORMAT_YVU422: |
| case DRM_FORMAT_YUV444: |
| case DRM_FORMAT_YVU444: |
| return 1; |
| default: |
| drm_fb_get_bpp_depth(format, &depth, &bpp); |
| return bpp >> 3; |
| } |
| } |
| EXPORT_SYMBOL(drm_format_plane_cpp); |
| |
| /** |
| * drm_format_horz_chroma_subsampling - get the horizontal chroma subsampling factor |
| * @format: pixel format (DRM_FORMAT_*) |
| * |
| * Returns: |
| * The horizontal chroma subsampling factor for the |
| * specified pixel format. |
| */ |
| int drm_format_horz_chroma_subsampling(uint32_t format) |
| { |
| switch (format) { |
| case DRM_FORMAT_YUV411: |
| case DRM_FORMAT_YVU411: |
| case DRM_FORMAT_YUV410: |
| case DRM_FORMAT_YVU410: |
| return 4; |
| case DRM_FORMAT_YUYV: |
| case DRM_FORMAT_YVYU: |
| case DRM_FORMAT_UYVY: |
| case DRM_FORMAT_VYUY: |
| case DRM_FORMAT_NV12: |
| case DRM_FORMAT_NV21: |
| case DRM_FORMAT_NV16: |
| case DRM_FORMAT_NV61: |
| case DRM_FORMAT_YUV422: |
| case DRM_FORMAT_YVU422: |
| case DRM_FORMAT_YUV420: |
| case DRM_FORMAT_YVU420: |
| return 2; |
| default: |
| return 1; |
| } |
| } |
| EXPORT_SYMBOL(drm_format_horz_chroma_subsampling); |
| |
| /** |
| * drm_format_vert_chroma_subsampling - get the vertical chroma subsampling factor |
| * @format: pixel format (DRM_FORMAT_*) |
| * |
| * Returns: |
| * The vertical chroma subsampling factor for the |
| * specified pixel format. |
| */ |
| int drm_format_vert_chroma_subsampling(uint32_t format) |
| { |
| switch (format) { |
| case DRM_FORMAT_YUV410: |
| case DRM_FORMAT_YVU410: |
| return 4; |
| case DRM_FORMAT_YUV420: |
| case DRM_FORMAT_YVU420: |
| case DRM_FORMAT_NV12: |
| case DRM_FORMAT_NV21: |
| return 2; |
| default: |
| return 1; |
| } |
| } |
| EXPORT_SYMBOL(drm_format_vert_chroma_subsampling); |
| |
| /** |
| * drm_rotation_simplify() - Try to simplify the rotation |
| * @rotation: Rotation to be simplified |
| * @supported_rotations: Supported rotations |
| * |
| * Attempt to simplify the rotation to a form that is supported. |
| * Eg. if the hardware supports everything except DRM_REFLECT_X |
| * one could call this function like this: |
| * |
| * drm_rotation_simplify(rotation, BIT(DRM_ROTATE_0) | |
| * BIT(DRM_ROTATE_90) | BIT(DRM_ROTATE_180) | |
| * BIT(DRM_ROTATE_270) | BIT(DRM_REFLECT_Y)); |
| * |
| * to eliminate the DRM_ROTATE_X flag. Depending on what kind of |
| * transforms the hardware supports, this function may not |
| * be able to produce a supported transform, so the caller should |
| * check the result afterwards. |
| */ |
| unsigned int drm_rotation_simplify(unsigned int rotation, |
| unsigned int supported_rotations) |
| { |
| if (rotation & ~supported_rotations) { |
| rotation ^= BIT(DRM_REFLECT_X) | BIT(DRM_REFLECT_Y); |
| rotation = (rotation & ~0xf) | BIT((ffs(rotation & 0xf) + 1) % 4); |
| } |
| |
| return rotation; |
| } |
| EXPORT_SYMBOL(drm_rotation_simplify); |
| |
| /** |
| * drm_mode_config_init - initialize DRM mode_configuration structure |
| * @dev: DRM device |
| * |
| * Initialize @dev's mode_config structure, used for tracking the graphics |
| * configuration of @dev. |
| * |
| * Since this initializes the modeset locks, no locking is possible. Which is no |
| * problem, since this should happen single threaded at init time. It is the |
| * driver's problem to ensure this guarantee. |
| * |
| */ |
| void drm_mode_config_init(struct drm_device *dev) |
| { |
| mutex_init(&dev->mode_config.mutex); |
| drm_modeset_lock_init(&dev->mode_config.connection_mutex); |
| mutex_init(&dev->mode_config.idr_mutex); |
| mutex_init(&dev->mode_config.fb_lock); |
| INIT_LIST_HEAD(&dev->mode_config.fb_list); |
| INIT_LIST_HEAD(&dev->mode_config.crtc_list); |
| INIT_LIST_HEAD(&dev->mode_config.connector_list); |
| INIT_LIST_HEAD(&dev->mode_config.encoder_list); |
| INIT_LIST_HEAD(&dev->mode_config.property_list); |
| INIT_LIST_HEAD(&dev->mode_config.property_blob_list); |
| INIT_LIST_HEAD(&dev->mode_config.plane_list); |
| idr_init(&dev->mode_config.crtc_idr); |
| idr_init(&dev->mode_config.tile_idr); |
| |
| drm_modeset_lock_all(dev); |
| drm_mode_create_standard_properties(dev); |
| drm_modeset_unlock_all(dev); |
| |
| /* Just to be sure */ |
| dev->mode_config.num_fb = 0; |
| dev->mode_config.num_connector = 0; |
| dev->mode_config.num_crtc = 0; |
| dev->mode_config.num_encoder = 0; |
| dev->mode_config.num_overlay_plane = 0; |
| dev->mode_config.num_total_plane = 0; |
| } |
| EXPORT_SYMBOL(drm_mode_config_init); |
| |
| /** |
| * drm_mode_config_cleanup - free up DRM mode_config info |
| * @dev: DRM device |
| * |
| * Free up all the connectors and CRTCs associated with this DRM device, then |
| * free up the framebuffers and associated buffer objects. |
| * |
| * Note that since this /should/ happen single-threaded at driver/device |
| * teardown time, no locking is required. It's the driver's job to ensure that |
| * this guarantee actually holds true. |
| * |
| * FIXME: cleanup any dangling user buffer objects too |
| */ |
| void drm_mode_config_cleanup(struct drm_device *dev) |
| { |
| struct drm_connector *connector, *ot; |
| struct drm_crtc *crtc, *ct; |
| struct drm_encoder *encoder, *enct; |
| struct drm_framebuffer *fb, *fbt; |
| struct drm_property *property, *pt; |
| struct drm_property_blob *blob, *bt; |
| struct drm_plane *plane, *plt; |
| |
| list_for_each_entry_safe(encoder, enct, &dev->mode_config.encoder_list, |
| head) { |
| encoder->funcs->destroy(encoder); |
| } |
| |
| list_for_each_entry_safe(connector, ot, |
| &dev->mode_config.connector_list, head) { |
| connector->funcs->destroy(connector); |
| } |
| |
| list_for_each_entry_safe(property, pt, &dev->mode_config.property_list, |
| head) { |
| drm_property_destroy(dev, property); |
| } |
| |
| list_for_each_entry_safe(blob, bt, &dev->mode_config.property_blob_list, |
| head) { |
| drm_property_destroy_blob(dev, blob); |
| } |
| |
| /* |
| * Single-threaded teardown context, so it's not required to grab the |
| * fb_lock to protect against concurrent fb_list access. Contrary, it |
| * would actually deadlock with the drm_framebuffer_cleanup function. |
| * |
| * Also, if there are any framebuffers left, that's a driver leak now, |
| * so politely WARN about this. |
| */ |
| WARN_ON(!list_empty(&dev->mode_config.fb_list)); |
| list_for_each_entry_safe(fb, fbt, &dev->mode_config.fb_list, head) { |
| drm_framebuffer_remove(fb); |
| } |
| |
| list_for_each_entry_safe(plane, plt, &dev->mode_config.plane_list, |
| head) { |
| plane->funcs->destroy(plane); |
| } |
| |
| list_for_each_entry_safe(crtc, ct, &dev->mode_config.crtc_list, head) { |
| crtc->funcs->destroy(crtc); |
| } |
| |
| idr_destroy(&dev->mode_config.tile_idr); |
| idr_destroy(&dev->mode_config.crtc_idr); |
| drm_modeset_lock_fini(&dev->mode_config.connection_mutex); |
| } |
| EXPORT_SYMBOL(drm_mode_config_cleanup); |
| |
| struct drm_property *drm_mode_create_rotation_property(struct drm_device *dev, |
| unsigned int supported_rotations) |
| { |
| static const struct drm_prop_enum_list props[] = { |
| { DRM_ROTATE_0, "rotate-0" }, |
| { DRM_ROTATE_90, "rotate-90" }, |
| { DRM_ROTATE_180, "rotate-180" }, |
| { DRM_ROTATE_270, "rotate-270" }, |
| { DRM_REFLECT_X, "reflect-x" }, |
| { DRM_REFLECT_Y, "reflect-y" }, |
| }; |
| |
| return drm_property_create_bitmask(dev, 0, "rotation", |
| props, ARRAY_SIZE(props), |
| supported_rotations); |
| } |
| EXPORT_SYMBOL(drm_mode_create_rotation_property); |
| |
| /** |
| * DOC: Tile group |
| * |
| * Tile groups are used to represent tiled monitors with a unique |
| * integer identifier. Tiled monitors using DisplayID v1.3 have |
| * a unique 8-byte handle, we store this in a tile group, so we |
| * have a common identifier for all tiles in a monitor group. |
| */ |
| static void drm_tile_group_free(struct kref *kref) |
| { |
| struct drm_tile_group *tg = container_of(kref, struct drm_tile_group, refcount); |
| struct drm_device *dev = tg->dev; |
| mutex_lock(&dev->mode_config.idr_mutex); |
| idr_remove(&dev->mode_config.tile_idr, tg->id); |
| mutex_unlock(&dev->mode_config.idr_mutex); |
| kfree(tg); |
| } |
| |
| /** |
| * drm_mode_put_tile_group - drop a reference to a tile group. |
| * @dev: DRM device |
| * @tg: tile group to drop reference to. |
| * |
| * drop reference to tile group and free if 0. |
| */ |
| void drm_mode_put_tile_group(struct drm_device *dev, |
| struct drm_tile_group *tg) |
| { |
| kref_put(&tg->refcount, drm_tile_group_free); |
| } |
| |
| /** |
| * drm_mode_get_tile_group - get a reference to an existing tile group |
| * @dev: DRM device |
| * @topology: 8-bytes unique per monitor. |
| * |
| * Use the unique bytes to get a reference to an existing tile group. |
| * |
| * RETURNS: |
| * tile group or NULL if not found. |
| */ |
| struct drm_tile_group *drm_mode_get_tile_group(struct drm_device *dev, |
| char topology[8]) |
| { |
| struct drm_tile_group *tg; |
| int id; |
| mutex_lock(&dev->mode_config.idr_mutex); |
| idr_for_each_entry(&dev->mode_config.tile_idr, tg, id) { |
| if (!memcmp(tg->group_data, topology, 8)) { |
| if (!kref_get_unless_zero(&tg->refcount)) |
| tg = NULL; |
| mutex_unlock(&dev->mode_config.idr_mutex); |
| return tg; |
| } |
| } |
| mutex_unlock(&dev->mode_config.idr_mutex); |
| return NULL; |
| } |
| |
| /** |
| * drm_mode_create_tile_group - create a tile group from a displayid description |
| * @dev: DRM device |
| * @topology: 8-bytes unique per monitor. |
| * |
| * Create a tile group for the unique monitor, and get a unique |
| * identifier for the tile group. |
| * |
| * RETURNS: |
| * new tile group or error. |
| */ |
| struct drm_tile_group *drm_mode_create_tile_group(struct drm_device *dev, |
| char topology[8]) |
| { |
| struct drm_tile_group *tg; |
| int ret; |
| |
| tg = kzalloc(sizeof(*tg), GFP_KERNEL); |
| if (!tg) |
| return ERR_PTR(-ENOMEM); |
| |
| kref_init(&tg->refcount); |
| memcpy(tg->group_data, topology, 8); |
| tg->dev = dev; |
| |
| mutex_lock(&dev->mode_config.idr_mutex); |
| ret = idr_alloc(&dev->mode_config.tile_idr, tg, 1, 0, GFP_KERNEL); |
| if (ret >= 0) { |
| tg->id = ret; |
| } else { |
| kfree(tg); |
| tg = ERR_PTR(ret); |
| } |
| |
| mutex_unlock(&dev->mode_config.idr_mutex); |
| return tg; |
| } |