| /* |
| * Copyright (c) 2006-2008 Intel Corporation |
| * Copyright (c) 2007 Dave Airlie <airlied@linux.ie> |
| * |
| * 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/export.h> |
| #include <linux/moduleparam.h> |
| |
| #include <drm/drmP.h> |
| #include <drm/drm_crtc.h> |
| #include <drm/drm_fourcc.h> |
| #include <drm/drm_crtc_helper.h> |
| #include <drm/drm_fb_helper.h> |
| #include <drm/drm_edid.h> |
| |
| MODULE_AUTHOR("David Airlie, Jesse Barnes"); |
| MODULE_DESCRIPTION("DRM KMS helper"); |
| MODULE_LICENSE("GPL and additional rights"); |
| |
| /** |
| * drm_helper_move_panel_connectors_to_head() - move panels to the front in the |
| * connector list |
| * @dev: drm device to operate on |
| * |
| * Some userspace presumes that the first connected connector is the main |
| * display, where it's supposed to display e.g. the login screen. For |
| * laptops, this should be the main panel. Use this function to sort all |
| * (eDP/LVDS) panels to the front of the connector list, instead of |
| * painstakingly trying to initialize them in the right order. |
| */ |
| void drm_helper_move_panel_connectors_to_head(struct drm_device *dev) |
| { |
| struct drm_connector *connector, *tmp; |
| struct list_head panel_list; |
| |
| INIT_LIST_HEAD(&panel_list); |
| |
| list_for_each_entry_safe(connector, tmp, |
| &dev->mode_config.connector_list, head) { |
| if (connector->connector_type == DRM_MODE_CONNECTOR_LVDS || |
| connector->connector_type == DRM_MODE_CONNECTOR_eDP) |
| list_move_tail(&connector->head, &panel_list); |
| } |
| |
| list_splice(&panel_list, &dev->mode_config.connector_list); |
| } |
| EXPORT_SYMBOL(drm_helper_move_panel_connectors_to_head); |
| |
| static bool drm_kms_helper_poll = true; |
| module_param_named(poll, drm_kms_helper_poll, bool, 0600); |
| |
| static void drm_mode_validate_flag(struct drm_connector *connector, |
| int flags) |
| { |
| struct drm_display_mode *mode; |
| |
| if (flags == (DRM_MODE_FLAG_DBLSCAN | DRM_MODE_FLAG_INTERLACE | |
| DRM_MODE_FLAG_3D_MASK)) |
| return; |
| |
| list_for_each_entry(mode, &connector->modes, head) { |
| if ((mode->flags & DRM_MODE_FLAG_INTERLACE) && |
| !(flags & DRM_MODE_FLAG_INTERLACE)) |
| mode->status = MODE_NO_INTERLACE; |
| if ((mode->flags & DRM_MODE_FLAG_DBLSCAN) && |
| !(flags & DRM_MODE_FLAG_DBLSCAN)) |
| mode->status = MODE_NO_DBLESCAN; |
| if ((mode->flags & DRM_MODE_FLAG_3D_MASK) && |
| !(flags & DRM_MODE_FLAG_3D_MASK)) |
| mode->status = MODE_NO_STEREO; |
| } |
| |
| return; |
| } |
| |
| /** |
| * drm_helper_probe_single_connector_modes - get complete set of display modes |
| * @connector: connector to probe |
| * @maxX: max width for modes |
| * @maxY: max height for modes |
| * |
| * LOCKING: |
| * Caller must hold mode config lock. |
| * |
| * Based on the helper callbacks implemented by @connector try to detect all |
| * valid modes. Modes will first be added to the connector's probed_modes list, |
| * then culled (based on validity and the @maxX, @maxY parameters) and put into |
| * the normal modes list. |
| * |
| * Intended to be use as a generic implementation of the ->fill_modes() |
| * @connector vfunc for drivers that use the crtc helpers for output mode |
| * filtering and detection. |
| * |
| * RETURNS: |
| * Number of modes found on @connector. |
| */ |
| int drm_helper_probe_single_connector_modes(struct drm_connector *connector, |
| uint32_t maxX, uint32_t maxY) |
| { |
| struct drm_device *dev = connector->dev; |
| struct drm_display_mode *mode; |
| struct drm_connector_helper_funcs *connector_funcs = |
| connector->helper_private; |
| int count = 0; |
| int mode_flags = 0; |
| bool verbose_prune = true; |
| |
| DRM_DEBUG_KMS("[CONNECTOR:%d:%s]\n", connector->base.id, |
| drm_get_connector_name(connector)); |
| /* set all modes to the unverified state */ |
| list_for_each_entry(mode, &connector->modes, head) |
| mode->status = MODE_UNVERIFIED; |
| |
| if (connector->force) { |
| if (connector->force == DRM_FORCE_ON) |
| connector->status = connector_status_connected; |
| else |
| connector->status = connector_status_disconnected; |
| if (connector->funcs->force) |
| connector->funcs->force(connector); |
| } else { |
| connector->status = connector->funcs->detect(connector, true); |
| } |
| |
| /* Re-enable polling in case the global poll config changed. */ |
| if (drm_kms_helper_poll != dev->mode_config.poll_running) |
| drm_kms_helper_poll_enable(dev); |
| |
| dev->mode_config.poll_running = drm_kms_helper_poll; |
| |
| if (connector->status == connector_status_disconnected) { |
| DRM_DEBUG_KMS("[CONNECTOR:%d:%s] disconnected\n", |
| connector->base.id, drm_get_connector_name(connector)); |
| drm_mode_connector_update_edid_property(connector, NULL); |
| verbose_prune = false; |
| goto prune; |
| } |
| |
| #ifdef CONFIG_DRM_LOAD_EDID_FIRMWARE |
| count = drm_load_edid_firmware(connector); |
| if (count == 0) |
| #endif |
| count = (*connector_funcs->get_modes)(connector); |
| |
| if (count == 0 && connector->status == connector_status_connected) |
| count = drm_add_modes_noedid(connector, 1024, 768); |
| if (count == 0) |
| goto prune; |
| |
| drm_mode_connector_list_update(connector); |
| |
| if (maxX && maxY) |
| drm_mode_validate_size(dev, &connector->modes, maxX, |
| maxY, 0); |
| |
| if (connector->interlace_allowed) |
| mode_flags |= DRM_MODE_FLAG_INTERLACE; |
| if (connector->doublescan_allowed) |
| mode_flags |= DRM_MODE_FLAG_DBLSCAN; |
| if (connector->stereo_allowed) |
| mode_flags |= DRM_MODE_FLAG_3D_MASK; |
| drm_mode_validate_flag(connector, mode_flags); |
| |
| list_for_each_entry(mode, &connector->modes, head) { |
| if (mode->status == MODE_OK) |
| mode->status = connector_funcs->mode_valid(connector, |
| mode); |
| } |
| |
| prune: |
| drm_mode_prune_invalid(dev, &connector->modes, verbose_prune); |
| |
| if (list_empty(&connector->modes)) |
| return 0; |
| |
| list_for_each_entry(mode, &connector->modes, head) |
| mode->vrefresh = drm_mode_vrefresh(mode); |
| |
| drm_mode_sort(&connector->modes); |
| |
| DRM_DEBUG_KMS("[CONNECTOR:%d:%s] probed modes :\n", connector->base.id, |
| drm_get_connector_name(connector)); |
| list_for_each_entry(mode, &connector->modes, head) { |
| drm_mode_set_crtcinfo(mode, CRTC_INTERLACE_HALVE_V); |
| drm_mode_debug_printmodeline(mode); |
| } |
| |
| return count; |
| } |
| EXPORT_SYMBOL(drm_helper_probe_single_connector_modes); |
| |
| /** |
| * drm_helper_encoder_in_use - check if a given encoder is in use |
| * @encoder: encoder to check |
| * |
| * LOCKING: |
| * Caller must hold mode config lock. |
| * |
| * Walk @encoders's DRM device's mode_config and see if it's in use. |
| * |
| * RETURNS: |
| * True if @encoder is part of the mode_config, false otherwise. |
| */ |
| bool drm_helper_encoder_in_use(struct drm_encoder *encoder) |
| { |
| struct drm_connector *connector; |
| struct drm_device *dev = encoder->dev; |
| list_for_each_entry(connector, &dev->mode_config.connector_list, head) |
| if (connector->encoder == encoder) |
| return true; |
| return false; |
| } |
| EXPORT_SYMBOL(drm_helper_encoder_in_use); |
| |
| /** |
| * drm_helper_crtc_in_use - check if a given CRTC is in a mode_config |
| * @crtc: CRTC to check |
| * |
| * LOCKING: |
| * Caller must hold mode config lock. |
| * |
| * Walk @crtc's DRM device's mode_config and see if it's in use. |
| * |
| * RETURNS: |
| * True if @crtc is part of the mode_config, false otherwise. |
| */ |
| bool drm_helper_crtc_in_use(struct drm_crtc *crtc) |
| { |
| struct drm_encoder *encoder; |
| struct drm_device *dev = crtc->dev; |
| /* FIXME: Locking around list access? */ |
| list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) |
| if (encoder->crtc == crtc && drm_helper_encoder_in_use(encoder)) |
| return true; |
| return false; |
| } |
| EXPORT_SYMBOL(drm_helper_crtc_in_use); |
| |
| static void |
| drm_encoder_disable(struct drm_encoder *encoder) |
| { |
| struct drm_encoder_helper_funcs *encoder_funcs = encoder->helper_private; |
| |
| if (encoder->bridge) |
| encoder->bridge->funcs->disable(encoder->bridge); |
| |
| if (encoder_funcs->disable) |
| (*encoder_funcs->disable)(encoder); |
| else |
| (*encoder_funcs->dpms)(encoder, DRM_MODE_DPMS_OFF); |
| |
| if (encoder->bridge) |
| encoder->bridge->funcs->post_disable(encoder->bridge); |
| } |
| |
| /** |
| * drm_helper_disable_unused_functions - disable unused objects |
| * @dev: DRM device |
| * |
| * LOCKING: |
| * Caller must hold mode config lock. |
| * |
| * If an connector or CRTC isn't part of @dev's mode_config, it can be disabled |
| * by calling its dpms function, which should power it off. |
| */ |
| void drm_helper_disable_unused_functions(struct drm_device *dev) |
| { |
| struct drm_encoder *encoder; |
| struct drm_connector *connector; |
| struct drm_crtc *crtc; |
| |
| list_for_each_entry(connector, &dev->mode_config.connector_list, head) { |
| if (!connector->encoder) |
| continue; |
| if (connector->status == connector_status_disconnected) |
| connector->encoder = NULL; |
| } |
| |
| list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) { |
| if (!drm_helper_encoder_in_use(encoder)) { |
| drm_encoder_disable(encoder); |
| /* disconnector encoder from any connector */ |
| encoder->crtc = NULL; |
| } |
| } |
| |
| list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) { |
| struct drm_crtc_helper_funcs *crtc_funcs = crtc->helper_private; |
| crtc->enabled = drm_helper_crtc_in_use(crtc); |
| if (!crtc->enabled) { |
| if (crtc_funcs->disable) |
| (*crtc_funcs->disable)(crtc); |
| else |
| (*crtc_funcs->dpms)(crtc, DRM_MODE_DPMS_OFF); |
| crtc->fb = NULL; |
| } |
| } |
| } |
| EXPORT_SYMBOL(drm_helper_disable_unused_functions); |
| |
| /** |
| * drm_encoder_crtc_ok - can a given crtc drive a given encoder? |
| * @encoder: encoder to test |
| * @crtc: crtc to test |
| * |
| * Return false if @encoder can't be driven by @crtc, true otherwise. |
| */ |
| static bool drm_encoder_crtc_ok(struct drm_encoder *encoder, |
| struct drm_crtc *crtc) |
| { |
| struct drm_device *dev; |
| struct drm_crtc *tmp; |
| int crtc_mask = 1; |
| |
| WARN(!crtc, "checking null crtc?\n"); |
| |
| dev = crtc->dev; |
| |
| list_for_each_entry(tmp, &dev->mode_config.crtc_list, head) { |
| if (tmp == crtc) |
| break; |
| crtc_mask <<= 1; |
| } |
| |
| if (encoder->possible_crtcs & crtc_mask) |
| return true; |
| return false; |
| } |
| |
| /* |
| * Check the CRTC we're going to map each output to vs. its current |
| * CRTC. If they don't match, we have to disable the output and the CRTC |
| * since the driver will have to re-route things. |
| */ |
| static void |
| drm_crtc_prepare_encoders(struct drm_device *dev) |
| { |
| struct drm_encoder_helper_funcs *encoder_funcs; |
| struct drm_encoder *encoder; |
| |
| list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) { |
| encoder_funcs = encoder->helper_private; |
| /* Disable unused encoders */ |
| if (encoder->crtc == NULL) |
| drm_encoder_disable(encoder); |
| /* Disable encoders whose CRTC is about to change */ |
| if (encoder_funcs->get_crtc && |
| encoder->crtc != (*encoder_funcs->get_crtc)(encoder)) |
| drm_encoder_disable(encoder); |
| } |
| } |
| |
| /** |
| * drm_crtc_helper_set_mode - internal helper to set a mode |
| * @crtc: CRTC to program |
| * @mode: mode to use |
| * @x: horizontal offset into the surface |
| * @y: vertical offset into the surface |
| * @old_fb: old framebuffer, for cleanup |
| * |
| * LOCKING: |
| * Caller must hold mode config lock. |
| * |
| * Try to set @mode on @crtc. Give @crtc and its associated connectors a chance |
| * to fixup or reject the mode prior to trying to set it. This is an internal |
| * helper that drivers could e.g. use to update properties that require the |
| * entire output pipe to be disabled and re-enabled in a new configuration. For |
| * example for changing whether audio is enabled on a hdmi link or for changing |
| * panel fitter or dither attributes. It is also called by the |
| * drm_crtc_helper_set_config() helper function to drive the mode setting |
| * sequence. |
| * |
| * RETURNS: |
| * True if the mode was set successfully, or false otherwise. |
| */ |
| bool drm_crtc_helper_set_mode(struct drm_crtc *crtc, |
| struct drm_display_mode *mode, |
| int x, int y, |
| struct drm_framebuffer *old_fb) |
| { |
| struct drm_device *dev = crtc->dev; |
| struct drm_display_mode *adjusted_mode, saved_mode, saved_hwmode; |
| struct drm_crtc_helper_funcs *crtc_funcs = crtc->helper_private; |
| struct drm_encoder_helper_funcs *encoder_funcs; |
| int saved_x, saved_y; |
| struct drm_encoder *encoder; |
| bool ret = true; |
| |
| crtc->enabled = drm_helper_crtc_in_use(crtc); |
| if (!crtc->enabled) |
| return true; |
| |
| adjusted_mode = drm_mode_duplicate(dev, mode); |
| if (!adjusted_mode) |
| return false; |
| |
| saved_hwmode = crtc->hwmode; |
| saved_mode = crtc->mode; |
| saved_x = crtc->x; |
| saved_y = crtc->y; |
| |
| /* Update crtc values up front so the driver can rely on them for mode |
| * setting. |
| */ |
| crtc->mode = *mode; |
| crtc->x = x; |
| crtc->y = y; |
| |
| /* Pass our mode to the connectors and the CRTC to give them a chance to |
| * adjust it according to limitations or connector properties, and also |
| * a chance to reject the mode entirely. |
| */ |
| list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) { |
| |
| if (encoder->crtc != crtc) |
| continue; |
| |
| if (encoder->bridge && encoder->bridge->funcs->mode_fixup) { |
| ret = encoder->bridge->funcs->mode_fixup( |
| encoder->bridge, mode, adjusted_mode); |
| if (!ret) { |
| DRM_DEBUG_KMS("Bridge fixup failed\n"); |
| goto done; |
| } |
| } |
| |
| encoder_funcs = encoder->helper_private; |
| if (!(ret = encoder_funcs->mode_fixup(encoder, mode, |
| adjusted_mode))) { |
| DRM_DEBUG_KMS("Encoder fixup failed\n"); |
| goto done; |
| } |
| } |
| |
| if (!(ret = crtc_funcs->mode_fixup(crtc, mode, adjusted_mode))) { |
| DRM_DEBUG_KMS("CRTC fixup failed\n"); |
| goto done; |
| } |
| DRM_DEBUG_KMS("[CRTC:%d]\n", crtc->base.id); |
| |
| /* Prepare the encoders and CRTCs before setting the mode. */ |
| list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) { |
| |
| if (encoder->crtc != crtc) |
| continue; |
| |
| if (encoder->bridge) |
| encoder->bridge->funcs->disable(encoder->bridge); |
| |
| encoder_funcs = encoder->helper_private; |
| /* Disable the encoders as the first thing we do. */ |
| encoder_funcs->prepare(encoder); |
| |
| if (encoder->bridge) |
| encoder->bridge->funcs->post_disable(encoder->bridge); |
| } |
| |
| drm_crtc_prepare_encoders(dev); |
| |
| crtc_funcs->prepare(crtc); |
| |
| /* Set up the DPLL and any encoders state that needs to adjust or depend |
| * on the DPLL. |
| */ |
| ret = !crtc_funcs->mode_set(crtc, mode, adjusted_mode, x, y, old_fb); |
| if (!ret) |
| goto done; |
| |
| list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) { |
| |
| if (encoder->crtc != crtc) |
| continue; |
| |
| DRM_DEBUG_KMS("[ENCODER:%d:%s] set [MODE:%d:%s]\n", |
| encoder->base.id, drm_get_encoder_name(encoder), |
| mode->base.id, mode->name); |
| encoder_funcs = encoder->helper_private; |
| encoder_funcs->mode_set(encoder, mode, adjusted_mode); |
| |
| if (encoder->bridge && encoder->bridge->funcs->mode_set) |
| encoder->bridge->funcs->mode_set(encoder->bridge, mode, |
| adjusted_mode); |
| } |
| |
| /* Now enable the clocks, plane, pipe, and connectors that we set up. */ |
| crtc_funcs->commit(crtc); |
| |
| list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) { |
| |
| if (encoder->crtc != crtc) |
| continue; |
| |
| if (encoder->bridge) |
| encoder->bridge->funcs->pre_enable(encoder->bridge); |
| |
| encoder_funcs = encoder->helper_private; |
| encoder_funcs->commit(encoder); |
| |
| if (encoder->bridge) |
| encoder->bridge->funcs->enable(encoder->bridge); |
| } |
| |
| /* Store real post-adjustment hardware mode. */ |
| crtc->hwmode = *adjusted_mode; |
| |
| /* Calculate and store various constants which |
| * are later needed by vblank and swap-completion |
| * timestamping. They are derived from true hwmode. |
| */ |
| drm_calc_timestamping_constants(crtc); |
| |
| /* FIXME: add subpixel order */ |
| done: |
| drm_mode_destroy(dev, adjusted_mode); |
| if (!ret) { |
| crtc->hwmode = saved_hwmode; |
| crtc->mode = saved_mode; |
| crtc->x = saved_x; |
| crtc->y = saved_y; |
| } |
| |
| return ret; |
| } |
| EXPORT_SYMBOL(drm_crtc_helper_set_mode); |
| |
| |
| static int |
| drm_crtc_helper_disable(struct drm_crtc *crtc) |
| { |
| struct drm_device *dev = crtc->dev; |
| struct drm_connector *connector; |
| struct drm_encoder *encoder; |
| |
| /* Decouple all encoders and their attached connectors from this crtc */ |
| list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) { |
| if (encoder->crtc != crtc) |
| continue; |
| |
| list_for_each_entry(connector, &dev->mode_config.connector_list, head) { |
| if (connector->encoder != encoder) |
| continue; |
| |
| connector->encoder = NULL; |
| |
| /* |
| * drm_helper_disable_unused_functions() ought to be |
| * doing this, but since we've decoupled the encoder |
| * from the connector above, the required connection |
| * between them is henceforth no longer available. |
| */ |
| connector->dpms = DRM_MODE_DPMS_OFF; |
| } |
| } |
| |
| drm_helper_disable_unused_functions(dev); |
| return 0; |
| } |
| |
| /** |
| * drm_crtc_helper_set_config - set a new config from userspace |
| * @set: mode set configuration |
| * |
| * LOCKING: |
| * Caller must hold mode config lock. |
| * |
| * Setup a new configuration, provided by the upper layers (either an ioctl call |
| * from userspace or internally e.g. from the fbdev suppport code) in @set, and |
| * enable it. This is the main helper functions for drivers that implement |
| * kernel mode setting with the crtc helper functions and the assorted |
| * ->prepare(), ->modeset() and ->commit() helper callbacks. |
| * |
| * RETURNS: |
| * Returns 0 on success, -ERRNO on failure. |
| */ |
| int drm_crtc_helper_set_config(struct drm_mode_set *set) |
| { |
| struct drm_device *dev; |
| struct drm_crtc *save_crtcs, *new_crtc, *crtc; |
| struct drm_encoder *save_encoders, *new_encoder, *encoder; |
| bool mode_changed = false; /* if true do a full mode set */ |
| bool fb_changed = false; /* if true and !mode_changed just do a flip */ |
| struct drm_connector *save_connectors, *connector; |
| int count = 0, ro, fail = 0; |
| struct drm_crtc_helper_funcs *crtc_funcs; |
| struct drm_mode_set save_set; |
| int ret; |
| int i; |
| |
| DRM_DEBUG_KMS("\n"); |
| |
| BUG_ON(!set); |
| BUG_ON(!set->crtc); |
| BUG_ON(!set->crtc->helper_private); |
| |
| /* Enforce sane interface api - has been abused by the fb helper. */ |
| BUG_ON(!set->mode && set->fb); |
| BUG_ON(set->fb && set->num_connectors == 0); |
| |
| crtc_funcs = set->crtc->helper_private; |
| |
| if (!set->mode) |
| set->fb = NULL; |
| |
| if (set->fb) { |
| DRM_DEBUG_KMS("[CRTC:%d] [FB:%d] #connectors=%d (x y) (%i %i)\n", |
| set->crtc->base.id, set->fb->base.id, |
| (int)set->num_connectors, set->x, set->y); |
| } else { |
| DRM_DEBUG_KMS("[CRTC:%d] [NOFB]\n", set->crtc->base.id); |
| return drm_crtc_helper_disable(set->crtc); |
| } |
| |
| dev = set->crtc->dev; |
| |
| /* Allocate space for the backup of all (non-pointer) crtc, encoder and |
| * connector data. */ |
| save_crtcs = kzalloc(dev->mode_config.num_crtc * |
| sizeof(struct drm_crtc), GFP_KERNEL); |
| if (!save_crtcs) |
| return -ENOMEM; |
| |
| save_encoders = kzalloc(dev->mode_config.num_encoder * |
| sizeof(struct drm_encoder), GFP_KERNEL); |
| if (!save_encoders) { |
| kfree(save_crtcs); |
| return -ENOMEM; |
| } |
| |
| save_connectors = kzalloc(dev->mode_config.num_connector * |
| sizeof(struct drm_connector), GFP_KERNEL); |
| if (!save_connectors) { |
| kfree(save_crtcs); |
| kfree(save_encoders); |
| return -ENOMEM; |
| } |
| |
| /* Copy data. Note that driver private data is not affected. |
| * Should anything bad happen only the expected state is |
| * restored, not the drivers personal bookkeeping. |
| */ |
| count = 0; |
| list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) { |
| save_crtcs[count++] = *crtc; |
| } |
| |
| count = 0; |
| list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) { |
| save_encoders[count++] = *encoder; |
| } |
| |
| count = 0; |
| list_for_each_entry(connector, &dev->mode_config.connector_list, head) { |
| save_connectors[count++] = *connector; |
| } |
| |
| save_set.crtc = set->crtc; |
| save_set.mode = &set->crtc->mode; |
| save_set.x = set->crtc->x; |
| save_set.y = set->crtc->y; |
| save_set.fb = set->crtc->fb; |
| |
| /* We should be able to check here if the fb has the same properties |
| * and then just flip_or_move it */ |
| if (set->crtc->fb != set->fb) { |
| /* If we have no fb then treat it as a full mode set */ |
| if (set->crtc->fb == NULL) { |
| DRM_DEBUG_KMS("crtc has no fb, full mode set\n"); |
| mode_changed = true; |
| } else if (set->fb == NULL) { |
| mode_changed = true; |
| } else if (set->fb->pixel_format != |
| set->crtc->fb->pixel_format) { |
| mode_changed = true; |
| } else |
| fb_changed = true; |
| } |
| |
| if (set->x != set->crtc->x || set->y != set->crtc->y) |
| fb_changed = true; |
| |
| if (set->mode && !drm_mode_equal(set->mode, &set->crtc->mode)) { |
| DRM_DEBUG_KMS("modes are different, full mode set\n"); |
| drm_mode_debug_printmodeline(&set->crtc->mode); |
| drm_mode_debug_printmodeline(set->mode); |
| mode_changed = true; |
| } |
| |
| /* a) traverse passed in connector list and get encoders for them */ |
| count = 0; |
| list_for_each_entry(connector, &dev->mode_config.connector_list, head) { |
| struct drm_connector_helper_funcs *connector_funcs = |
| connector->helper_private; |
| new_encoder = connector->encoder; |
| for (ro = 0; ro < set->num_connectors; ro++) { |
| if (set->connectors[ro] == connector) { |
| new_encoder = connector_funcs->best_encoder(connector); |
| /* if we can't get an encoder for a connector |
| we are setting now - then fail */ |
| if (new_encoder == NULL) |
| /* don't break so fail path works correct */ |
| fail = 1; |
| break; |
| |
| if (connector->dpms != DRM_MODE_DPMS_ON) { |
| DRM_DEBUG_KMS("connector dpms not on, full mode switch\n"); |
| mode_changed = true; |
| } |
| } |
| } |
| |
| if (new_encoder != connector->encoder) { |
| DRM_DEBUG_KMS("encoder changed, full mode switch\n"); |
| mode_changed = true; |
| /* If the encoder is reused for another connector, then |
| * the appropriate crtc will be set later. |
| */ |
| if (connector->encoder) |
| connector->encoder->crtc = NULL; |
| connector->encoder = new_encoder; |
| } |
| } |
| |
| if (fail) { |
| ret = -EINVAL; |
| goto fail; |
| } |
| |
| count = 0; |
| list_for_each_entry(connector, &dev->mode_config.connector_list, head) { |
| if (!connector->encoder) |
| continue; |
| |
| if (connector->encoder->crtc == set->crtc) |
| new_crtc = NULL; |
| else |
| new_crtc = connector->encoder->crtc; |
| |
| for (ro = 0; ro < set->num_connectors; ro++) { |
| if (set->connectors[ro] == connector) |
| new_crtc = set->crtc; |
| } |
| |
| /* Make sure the new CRTC will work with the encoder */ |
| if (new_crtc && |
| !drm_encoder_crtc_ok(connector->encoder, new_crtc)) { |
| ret = -EINVAL; |
| goto fail; |
| } |
| if (new_crtc != connector->encoder->crtc) { |
| DRM_DEBUG_KMS("crtc changed, full mode switch\n"); |
| mode_changed = true; |
| connector->encoder->crtc = new_crtc; |
| } |
| if (new_crtc) { |
| DRM_DEBUG_KMS("[CONNECTOR:%d:%s] to [CRTC:%d]\n", |
| connector->base.id, drm_get_connector_name(connector), |
| new_crtc->base.id); |
| } else { |
| DRM_DEBUG_KMS("[CONNECTOR:%d:%s] to [NOCRTC]\n", |
| connector->base.id, drm_get_connector_name(connector)); |
| } |
| } |
| |
| /* mode_set_base is not a required function */ |
| if (fb_changed && !crtc_funcs->mode_set_base) |
| mode_changed = true; |
| |
| if (mode_changed) { |
| set->crtc->enabled = drm_helper_crtc_in_use(set->crtc); |
| if (set->crtc->enabled) { |
| DRM_DEBUG_KMS("attempting to set mode from" |
| " userspace\n"); |
| drm_mode_debug_printmodeline(set->mode); |
| set->crtc->fb = set->fb; |
| if (!drm_crtc_helper_set_mode(set->crtc, set->mode, |
| set->x, set->y, |
| save_set.fb)) { |
| DRM_ERROR("failed to set mode on [CRTC:%d]\n", |
| set->crtc->base.id); |
| set->crtc->fb = save_set.fb; |
| ret = -EINVAL; |
| goto fail; |
| } |
| DRM_DEBUG_KMS("Setting connector DPMS state to on\n"); |
| for (i = 0; i < set->num_connectors; i++) { |
| DRM_DEBUG_KMS("\t[CONNECTOR:%d:%s] set DPMS on\n", set->connectors[i]->base.id, |
| drm_get_connector_name(set->connectors[i])); |
| set->connectors[i]->funcs->dpms(set->connectors[i], DRM_MODE_DPMS_ON); |
| } |
| } |
| drm_helper_disable_unused_functions(dev); |
| } else if (fb_changed) { |
| set->crtc->x = set->x; |
| set->crtc->y = set->y; |
| set->crtc->fb = set->fb; |
| ret = crtc_funcs->mode_set_base(set->crtc, |
| set->x, set->y, save_set.fb); |
| if (ret != 0) { |
| set->crtc->fb = save_set.fb; |
| goto fail; |
| } |
| } |
| |
| kfree(save_connectors); |
| kfree(save_encoders); |
| kfree(save_crtcs); |
| return 0; |
| |
| fail: |
| /* Restore all previous data. */ |
| count = 0; |
| list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) { |
| *crtc = save_crtcs[count++]; |
| } |
| |
| count = 0; |
| list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) { |
| *encoder = save_encoders[count++]; |
| } |
| |
| count = 0; |
| list_for_each_entry(connector, &dev->mode_config.connector_list, head) { |
| *connector = save_connectors[count++]; |
| } |
| |
| /* Try to restore the config */ |
| if (mode_changed && |
| !drm_crtc_helper_set_mode(save_set.crtc, save_set.mode, save_set.x, |
| save_set.y, save_set.fb)) |
| DRM_ERROR("failed to restore config after modeset failure\n"); |
| |
| kfree(save_connectors); |
| kfree(save_encoders); |
| kfree(save_crtcs); |
| return ret; |
| } |
| EXPORT_SYMBOL(drm_crtc_helper_set_config); |
| |
| static int drm_helper_choose_encoder_dpms(struct drm_encoder *encoder) |
| { |
| int dpms = DRM_MODE_DPMS_OFF; |
| struct drm_connector *connector; |
| struct drm_device *dev = encoder->dev; |
| |
| list_for_each_entry(connector, &dev->mode_config.connector_list, head) |
| if (connector->encoder == encoder) |
| if (connector->dpms < dpms) |
| dpms = connector->dpms; |
| return dpms; |
| } |
| |
| /* Helper which handles bridge ordering around encoder dpms */ |
| static void drm_helper_encoder_dpms(struct drm_encoder *encoder, int mode) |
| { |
| struct drm_bridge *bridge = encoder->bridge; |
| struct drm_encoder_helper_funcs *encoder_funcs; |
| |
| if (bridge) { |
| if (mode == DRM_MODE_DPMS_ON) |
| bridge->funcs->pre_enable(bridge); |
| else |
| bridge->funcs->disable(bridge); |
| } |
| |
| encoder_funcs = encoder->helper_private; |
| if (encoder_funcs->dpms) |
| encoder_funcs->dpms(encoder, mode); |
| |
| if (bridge) { |
| if (mode == DRM_MODE_DPMS_ON) |
| bridge->funcs->enable(bridge); |
| else |
| bridge->funcs->post_disable(bridge); |
| } |
| } |
| |
| static int drm_helper_choose_crtc_dpms(struct drm_crtc *crtc) |
| { |
| int dpms = DRM_MODE_DPMS_OFF; |
| struct drm_connector *connector; |
| struct drm_device *dev = crtc->dev; |
| |
| list_for_each_entry(connector, &dev->mode_config.connector_list, head) |
| if (connector->encoder && connector->encoder->crtc == crtc) |
| if (connector->dpms < dpms) |
| dpms = connector->dpms; |
| return dpms; |
| } |
| |
| /** |
| * drm_helper_connector_dpms() - connector dpms helper implementation |
| * @connector: affected connector |
| * @mode: DPMS mode |
| * |
| * This is the main helper function provided by the crtc helper framework for |
| * implementing the DPMS connector attribute. It computes the new desired DPMS |
| * state for all encoders and crtcs in the output mesh and calls the ->dpms() |
| * callback provided by the driver appropriately. |
| */ |
| void drm_helper_connector_dpms(struct drm_connector *connector, int mode) |
| { |
| struct drm_encoder *encoder = connector->encoder; |
| struct drm_crtc *crtc = encoder ? encoder->crtc : NULL; |
| int old_dpms, encoder_dpms = DRM_MODE_DPMS_OFF; |
| |
| if (mode == connector->dpms) |
| return; |
| |
| old_dpms = connector->dpms; |
| connector->dpms = mode; |
| |
| if (encoder) |
| encoder_dpms = drm_helper_choose_encoder_dpms(encoder); |
| |
| /* from off to on, do crtc then encoder */ |
| if (mode < old_dpms) { |
| if (crtc) { |
| struct drm_crtc_helper_funcs *crtc_funcs = crtc->helper_private; |
| if (crtc_funcs->dpms) |
| (*crtc_funcs->dpms) (crtc, |
| drm_helper_choose_crtc_dpms(crtc)); |
| } |
| if (encoder) |
| drm_helper_encoder_dpms(encoder, encoder_dpms); |
| } |
| |
| /* from on to off, do encoder then crtc */ |
| if (mode > old_dpms) { |
| if (encoder) |
| drm_helper_encoder_dpms(encoder, encoder_dpms); |
| if (crtc) { |
| struct drm_crtc_helper_funcs *crtc_funcs = crtc->helper_private; |
| if (crtc_funcs->dpms) |
| (*crtc_funcs->dpms) (crtc, |
| drm_helper_choose_crtc_dpms(crtc)); |
| } |
| } |
| |
| return; |
| } |
| EXPORT_SYMBOL(drm_helper_connector_dpms); |
| |
| int drm_helper_mode_fill_fb_struct(struct drm_framebuffer *fb, |
| struct drm_mode_fb_cmd2 *mode_cmd) |
| { |
| int i; |
| |
| fb->width = mode_cmd->width; |
| fb->height = mode_cmd->height; |
| for (i = 0; i < 4; i++) { |
| fb->pitches[i] = mode_cmd->pitches[i]; |
| fb->offsets[i] = mode_cmd->offsets[i]; |
| } |
| drm_fb_get_bpp_depth(mode_cmd->pixel_format, &fb->depth, |
| &fb->bits_per_pixel); |
| fb->pixel_format = mode_cmd->pixel_format; |
| |
| return 0; |
| } |
| EXPORT_SYMBOL(drm_helper_mode_fill_fb_struct); |
| |
| int drm_helper_resume_force_mode(struct drm_device *dev) |
| { |
| struct drm_crtc *crtc; |
| struct drm_encoder *encoder; |
| struct drm_crtc_helper_funcs *crtc_funcs; |
| int ret, encoder_dpms; |
| |
| list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) { |
| |
| if (!crtc->enabled) |
| continue; |
| |
| ret = drm_crtc_helper_set_mode(crtc, &crtc->mode, |
| crtc->x, crtc->y, crtc->fb); |
| |
| if (ret == false) |
| DRM_ERROR("failed to set mode on crtc %p\n", crtc); |
| |
| /* Turn off outputs that were already powered off */ |
| if (drm_helper_choose_crtc_dpms(crtc)) { |
| list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) { |
| |
| if(encoder->crtc != crtc) |
| continue; |
| |
| encoder_dpms = drm_helper_choose_encoder_dpms( |
| encoder); |
| |
| drm_helper_encoder_dpms(encoder, encoder_dpms); |
| } |
| |
| crtc_funcs = crtc->helper_private; |
| if (crtc_funcs->dpms) |
| (*crtc_funcs->dpms) (crtc, |
| drm_helper_choose_crtc_dpms(crtc)); |
| } |
| } |
| /* disable the unused connectors while restoring the modesetting */ |
| drm_helper_disable_unused_functions(dev); |
| return 0; |
| } |
| EXPORT_SYMBOL(drm_helper_resume_force_mode); |
| |
| void drm_kms_helper_hotplug_event(struct drm_device *dev) |
| { |
| /* send a uevent + call fbdev */ |
| drm_sysfs_hotplug_event(dev); |
| if (dev->mode_config.funcs->output_poll_changed) |
| dev->mode_config.funcs->output_poll_changed(dev); |
| } |
| EXPORT_SYMBOL(drm_kms_helper_hotplug_event); |
| |
| #define DRM_OUTPUT_POLL_PERIOD (10*HZ) |
| static void output_poll_execute(struct work_struct *work) |
| { |
| struct delayed_work *delayed_work = to_delayed_work(work); |
| struct drm_device *dev = container_of(delayed_work, struct drm_device, mode_config.output_poll_work); |
| struct drm_connector *connector; |
| enum drm_connector_status old_status; |
| bool repoll = false, changed = false; |
| |
| if (!drm_kms_helper_poll) |
| return; |
| |
| mutex_lock(&dev->mode_config.mutex); |
| list_for_each_entry(connector, &dev->mode_config.connector_list, head) { |
| |
| /* Ignore forced connectors. */ |
| if (connector->force) |
| continue; |
| |
| /* Ignore HPD capable connectors and connectors where we don't |
| * want any hotplug detection at all for polling. */ |
| if (!connector->polled || connector->polled == DRM_CONNECTOR_POLL_HPD) |
| continue; |
| |
| repoll = true; |
| |
| old_status = connector->status; |
| /* if we are connected and don't want to poll for disconnect |
| skip it */ |
| if (old_status == connector_status_connected && |
| !(connector->polled & DRM_CONNECTOR_POLL_DISCONNECT)) |
| continue; |
| |
| connector->status = connector->funcs->detect(connector, false); |
| if (old_status != connector->status) { |
| const char *old, *new; |
| |
| old = drm_get_connector_status_name(old_status); |
| new = drm_get_connector_status_name(connector->status); |
| |
| DRM_DEBUG_KMS("[CONNECTOR:%d:%s] " |
| "status updated from %s to %s\n", |
| connector->base.id, |
| drm_get_connector_name(connector), |
| old, new); |
| |
| changed = true; |
| } |
| } |
| |
| mutex_unlock(&dev->mode_config.mutex); |
| |
| if (changed) |
| drm_kms_helper_hotplug_event(dev); |
| |
| if (repoll) |
| schedule_delayed_work(delayed_work, DRM_OUTPUT_POLL_PERIOD); |
| } |
| |
| void drm_kms_helper_poll_disable(struct drm_device *dev) |
| { |
| if (!dev->mode_config.poll_enabled) |
| return; |
| cancel_delayed_work_sync(&dev->mode_config.output_poll_work); |
| } |
| EXPORT_SYMBOL(drm_kms_helper_poll_disable); |
| |
| void drm_kms_helper_poll_enable(struct drm_device *dev) |
| { |
| bool poll = false; |
| struct drm_connector *connector; |
| |
| if (!dev->mode_config.poll_enabled || !drm_kms_helper_poll) |
| return; |
| |
| list_for_each_entry(connector, &dev->mode_config.connector_list, head) { |
| if (connector->polled & (DRM_CONNECTOR_POLL_CONNECT | |
| DRM_CONNECTOR_POLL_DISCONNECT)) |
| poll = true; |
| } |
| |
| if (poll) |
| schedule_delayed_work(&dev->mode_config.output_poll_work, DRM_OUTPUT_POLL_PERIOD); |
| } |
| EXPORT_SYMBOL(drm_kms_helper_poll_enable); |
| |
| void drm_kms_helper_poll_init(struct drm_device *dev) |
| { |
| INIT_DELAYED_WORK(&dev->mode_config.output_poll_work, output_poll_execute); |
| dev->mode_config.poll_enabled = true; |
| |
| drm_kms_helper_poll_enable(dev); |
| } |
| EXPORT_SYMBOL(drm_kms_helper_poll_init); |
| |
| void drm_kms_helper_poll_fini(struct drm_device *dev) |
| { |
| drm_kms_helper_poll_disable(dev); |
| } |
| EXPORT_SYMBOL(drm_kms_helper_poll_fini); |
| |
| bool drm_helper_hpd_irq_event(struct drm_device *dev) |
| { |
| struct drm_connector *connector; |
| enum drm_connector_status old_status; |
| bool changed = false; |
| |
| if (!dev->mode_config.poll_enabled) |
| return false; |
| |
| mutex_lock(&dev->mode_config.mutex); |
| list_for_each_entry(connector, &dev->mode_config.connector_list, head) { |
| |
| /* Only handle HPD capable connectors. */ |
| if (!(connector->polled & DRM_CONNECTOR_POLL_HPD)) |
| continue; |
| |
| old_status = connector->status; |
| |
| connector->status = connector->funcs->detect(connector, false); |
| DRM_DEBUG_KMS("[CONNECTOR:%d:%s] status updated from %s to %s\n", |
| connector->base.id, |
| drm_get_connector_name(connector), |
| drm_get_connector_status_name(old_status), |
| drm_get_connector_status_name(connector->status)); |
| if (old_status != connector->status) |
| changed = true; |
| } |
| |
| mutex_unlock(&dev->mode_config.mutex); |
| |
| if (changed) |
| drm_kms_helper_hotplug_event(dev); |
| |
| return changed; |
| } |
| EXPORT_SYMBOL(drm_helper_hpd_irq_event); |