| /* |
| * Copyright (c) 2006-2009 Red Hat Inc. |
| * Copyright (c) 2006-2008 Intel Corporation |
| * Copyright (c) 2007 Dave Airlie <airlied@linux.ie> |
| * |
| * DRM framebuffer helper 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: |
| * Dave Airlie <airlied@linux.ie> |
| * Jesse Barnes <jesse.barnes@intel.com> |
| */ |
| #include <linux/kernel.h> |
| #include <linux/sysrq.h> |
| #include <linux/slab.h> |
| #include <linux/fb.h> |
| #include <linux/module.h> |
| #include "drmP.h" |
| #include "drm_crtc.h" |
| #include "drm_fb_helper.h" |
| #include "drm_crtc_helper.h" |
| |
| MODULE_AUTHOR("David Airlie, Jesse Barnes"); |
| MODULE_DESCRIPTION("DRM KMS helper"); |
| MODULE_LICENSE("GPL and additional rights"); |
| |
| static LIST_HEAD(kernel_fb_helper_list); |
| |
| /* simple single crtc case helper function */ |
| int drm_fb_helper_single_add_all_connectors(struct drm_fb_helper *fb_helper) |
| { |
| struct drm_device *dev = fb_helper->dev; |
| struct drm_connector *connector; |
| int i; |
| |
| list_for_each_entry(connector, &dev->mode_config.connector_list, head) { |
| struct drm_fb_helper_connector *fb_helper_connector; |
| |
| fb_helper_connector = kzalloc(sizeof(struct drm_fb_helper_connector), GFP_KERNEL); |
| if (!fb_helper_connector) |
| goto fail; |
| |
| fb_helper_connector->connector = connector; |
| fb_helper->connector_info[fb_helper->connector_count++] = fb_helper_connector; |
| } |
| return 0; |
| fail: |
| for (i = 0; i < fb_helper->connector_count; i++) { |
| kfree(fb_helper->connector_info[i]); |
| fb_helper->connector_info[i] = NULL; |
| } |
| fb_helper->connector_count = 0; |
| return -ENOMEM; |
| } |
| EXPORT_SYMBOL(drm_fb_helper_single_add_all_connectors); |
| |
| static int drm_fb_helper_parse_command_line(struct drm_fb_helper *fb_helper) |
| { |
| struct drm_fb_helper_connector *fb_helper_conn; |
| int i; |
| |
| for (i = 0; i < fb_helper->connector_count; i++) { |
| struct drm_cmdline_mode *mode; |
| struct drm_connector *connector; |
| char *option = NULL; |
| |
| fb_helper_conn = fb_helper->connector_info[i]; |
| connector = fb_helper_conn->connector; |
| mode = &fb_helper_conn->cmdline_mode; |
| |
| /* do something on return - turn off connector maybe */ |
| if (fb_get_options(drm_get_connector_name(connector), &option)) |
| continue; |
| |
| if (drm_mode_parse_command_line_for_connector(option, |
| connector, |
| mode)) { |
| 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", |
| drm_get_connector_name(connector), s); |
| connector->force = mode->force; |
| } |
| |
| DRM_DEBUG_KMS("cmdline mode for connector %s %dx%d@%dHz%s%s%s\n", |
| drm_get_connector_name(connector), |
| mode->xres, mode->yres, |
| mode->refresh_specified ? mode->refresh : 60, |
| mode->rb ? " reduced blanking" : "", |
| mode->margins ? " with margins" : "", |
| mode->interlace ? " interlaced" : ""); |
| } |
| |
| } |
| return 0; |
| } |
| |
| static void drm_fb_helper_save_lut_atomic(struct drm_crtc *crtc, struct drm_fb_helper *helper) |
| { |
| uint16_t *r_base, *g_base, *b_base; |
| int i; |
| |
| r_base = crtc->gamma_store; |
| g_base = r_base + crtc->gamma_size; |
| b_base = g_base + crtc->gamma_size; |
| |
| for (i = 0; i < crtc->gamma_size; i++) |
| helper->funcs->gamma_get(crtc, &r_base[i], &g_base[i], &b_base[i], i); |
| } |
| |
| static void drm_fb_helper_restore_lut_atomic(struct drm_crtc *crtc) |
| { |
| uint16_t *r_base, *g_base, *b_base; |
| |
| r_base = crtc->gamma_store; |
| g_base = r_base + crtc->gamma_size; |
| b_base = g_base + crtc->gamma_size; |
| |
| crtc->funcs->gamma_set(crtc, r_base, g_base, b_base, 0, crtc->gamma_size); |
| } |
| |
| int drm_fb_helper_debug_enter(struct fb_info *info) |
| { |
| struct drm_fb_helper *helper = info->par; |
| struct drm_crtc_helper_funcs *funcs; |
| int i; |
| |
| if (list_empty(&kernel_fb_helper_list)) |
| return false; |
| |
| list_for_each_entry(helper, &kernel_fb_helper_list, kernel_fb_list) { |
| for (i = 0; i < helper->crtc_count; i++) { |
| struct drm_mode_set *mode_set = |
| &helper->crtc_info[i].mode_set; |
| |
| if (!mode_set->crtc->enabled) |
| continue; |
| |
| funcs = mode_set->crtc->helper_private; |
| drm_fb_helper_save_lut_atomic(mode_set->crtc, helper); |
| funcs->mode_set_base_atomic(mode_set->crtc, |
| mode_set->fb, |
| mode_set->x, |
| mode_set->y, |
| ENTER_ATOMIC_MODE_SET); |
| } |
| } |
| |
| return 0; |
| } |
| EXPORT_SYMBOL(drm_fb_helper_debug_enter); |
| |
| /* Find the real fb for a given fb helper CRTC */ |
| static struct drm_framebuffer *drm_mode_config_fb(struct drm_crtc *crtc) |
| { |
| struct drm_device *dev = crtc->dev; |
| struct drm_crtc *c; |
| |
| list_for_each_entry(c, &dev->mode_config.crtc_list, head) { |
| if (crtc->base.id == c->base.id) |
| return c->fb; |
| } |
| |
| return NULL; |
| } |
| |
| int drm_fb_helper_debug_leave(struct fb_info *info) |
| { |
| struct drm_fb_helper *helper = info->par; |
| struct drm_crtc *crtc; |
| struct drm_crtc_helper_funcs *funcs; |
| struct drm_framebuffer *fb; |
| int i; |
| |
| for (i = 0; i < helper->crtc_count; i++) { |
| struct drm_mode_set *mode_set = &helper->crtc_info[i].mode_set; |
| crtc = mode_set->crtc; |
| funcs = crtc->helper_private; |
| fb = drm_mode_config_fb(crtc); |
| |
| if (!crtc->enabled) |
| continue; |
| |
| if (!fb) { |
| DRM_ERROR("no fb to restore??\n"); |
| continue; |
| } |
| |
| drm_fb_helper_restore_lut_atomic(mode_set->crtc); |
| funcs->mode_set_base_atomic(mode_set->crtc, fb, crtc->x, |
| crtc->y, LEAVE_ATOMIC_MODE_SET); |
| } |
| |
| return 0; |
| } |
| EXPORT_SYMBOL(drm_fb_helper_debug_leave); |
| |
| bool drm_fb_helper_restore_fbdev_mode(struct drm_fb_helper *fb_helper) |
| { |
| bool error = false; |
| int i, ret; |
| for (i = 0; i < fb_helper->crtc_count; i++) { |
| struct drm_mode_set *mode_set = &fb_helper->crtc_info[i].mode_set; |
| ret = drm_crtc_helper_set_config(mode_set); |
| if (ret) |
| error = true; |
| } |
| return error; |
| } |
| EXPORT_SYMBOL(drm_fb_helper_restore_fbdev_mode); |
| |
| bool drm_fb_helper_force_kernel_mode(void) |
| { |
| bool ret, error = false; |
| struct drm_fb_helper *helper; |
| |
| if (list_empty(&kernel_fb_helper_list)) |
| return false; |
| |
| list_for_each_entry(helper, &kernel_fb_helper_list, kernel_fb_list) { |
| if (helper->dev->switch_power_state == DRM_SWITCH_POWER_OFF) |
| continue; |
| |
| ret = drm_fb_helper_restore_fbdev_mode(helper); |
| if (ret) |
| error = true; |
| } |
| return error; |
| } |
| |
| int drm_fb_helper_panic(struct notifier_block *n, unsigned long ununsed, |
| void *panic_str) |
| { |
| /* |
| * It's a waste of time and effort to switch back to text console |
| * if the kernel should reboot before panic messages can be seen. |
| */ |
| if (panic_timeout < 0) |
| return 0; |
| |
| printk(KERN_ERR "panic occurred, switching back to text console\n"); |
| return drm_fb_helper_force_kernel_mode(); |
| } |
| EXPORT_SYMBOL(drm_fb_helper_panic); |
| |
| static struct notifier_block paniced = { |
| .notifier_call = drm_fb_helper_panic, |
| }; |
| |
| /** |
| * drm_fb_helper_restore - restore the framebuffer console (kernel) config |
| * |
| * Restore's the kernel's fbcon mode, used for lastclose & panic paths. |
| */ |
| void drm_fb_helper_restore(void) |
| { |
| bool ret; |
| ret = drm_fb_helper_force_kernel_mode(); |
| if (ret == true) |
| DRM_ERROR("Failed to restore crtc configuration\n"); |
| } |
| EXPORT_SYMBOL(drm_fb_helper_restore); |
| |
| #ifdef CONFIG_MAGIC_SYSRQ |
| static void drm_fb_helper_restore_work_fn(struct work_struct *ignored) |
| { |
| drm_fb_helper_restore(); |
| } |
| static DECLARE_WORK(drm_fb_helper_restore_work, drm_fb_helper_restore_work_fn); |
| |
| static void drm_fb_helper_sysrq(int dummy1) |
| { |
| schedule_work(&drm_fb_helper_restore_work); |
| } |
| |
| static struct sysrq_key_op sysrq_drm_fb_helper_restore_op = { |
| .handler = drm_fb_helper_sysrq, |
| .help_msg = "force-fb(V)", |
| .action_msg = "Restore framebuffer console", |
| }; |
| #else |
| static struct sysrq_key_op sysrq_drm_fb_helper_restore_op = { }; |
| #endif |
| |
| static void drm_fb_helper_on(struct fb_info *info) |
| { |
| struct drm_fb_helper *fb_helper = info->par; |
| struct drm_device *dev = fb_helper->dev; |
| struct drm_crtc *crtc; |
| struct drm_crtc_helper_funcs *crtc_funcs; |
| struct drm_connector *connector; |
| struct drm_encoder *encoder; |
| int i, j; |
| |
| /* |
| * For each CRTC in this fb, turn the crtc on then, |
| * find all associated encoders and turn them on. |
| */ |
| mutex_lock(&dev->mode_config.mutex); |
| for (i = 0; i < fb_helper->crtc_count; i++) { |
| crtc = fb_helper->crtc_info[i].mode_set.crtc; |
| crtc_funcs = crtc->helper_private; |
| |
| if (!crtc->enabled) |
| continue; |
| |
| crtc_funcs->dpms(crtc, DRM_MODE_DPMS_ON); |
| |
| /* Walk the connectors & encoders on this fb turning them on */ |
| for (j = 0; j < fb_helper->connector_count; j++) { |
| connector = fb_helper->connector_info[j]->connector; |
| connector->dpms = DRM_MODE_DPMS_ON; |
| drm_connector_property_set_value(connector, |
| dev->mode_config.dpms_property, |
| DRM_MODE_DPMS_ON); |
| } |
| /* Found a CRTC on this fb, now find encoders */ |
| list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) { |
| if (encoder->crtc == crtc) { |
| struct drm_encoder_helper_funcs *encoder_funcs; |
| |
| encoder_funcs = encoder->helper_private; |
| encoder_funcs->dpms(encoder, DRM_MODE_DPMS_ON); |
| } |
| } |
| } |
| mutex_unlock(&dev->mode_config.mutex); |
| } |
| |
| static void drm_fb_helper_off(struct fb_info *info, int dpms_mode) |
| { |
| struct drm_fb_helper *fb_helper = info->par; |
| struct drm_device *dev = fb_helper->dev; |
| struct drm_crtc *crtc; |
| struct drm_crtc_helper_funcs *crtc_funcs; |
| struct drm_connector *connector; |
| struct drm_encoder *encoder; |
| int i, j; |
| |
| /* |
| * For each CRTC in this fb, find all associated encoders |
| * and turn them off, then turn off the CRTC. |
| */ |
| mutex_lock(&dev->mode_config.mutex); |
| for (i = 0; i < fb_helper->crtc_count; i++) { |
| crtc = fb_helper->crtc_info[i].mode_set.crtc; |
| crtc_funcs = crtc->helper_private; |
| |
| if (!crtc->enabled) |
| continue; |
| |
| /* Walk the connectors on this fb and mark them off */ |
| for (j = 0; j < fb_helper->connector_count; j++) { |
| connector = fb_helper->connector_info[j]->connector; |
| connector->dpms = dpms_mode; |
| drm_connector_property_set_value(connector, |
| dev->mode_config.dpms_property, |
| dpms_mode); |
| } |
| /* Found a CRTC on this fb, now find encoders */ |
| list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) { |
| if (encoder->crtc == crtc) { |
| struct drm_encoder_helper_funcs *encoder_funcs; |
| |
| encoder_funcs = encoder->helper_private; |
| encoder_funcs->dpms(encoder, dpms_mode); |
| } |
| } |
| crtc_funcs->dpms(crtc, DRM_MODE_DPMS_OFF); |
| } |
| mutex_unlock(&dev->mode_config.mutex); |
| } |
| |
| int drm_fb_helper_blank(int blank, struct fb_info *info) |
| { |
| switch (blank) { |
| /* Display: On; HSync: On, VSync: On */ |
| case FB_BLANK_UNBLANK: |
| drm_fb_helper_on(info); |
| break; |
| /* Display: Off; HSync: On, VSync: On */ |
| case FB_BLANK_NORMAL: |
| drm_fb_helper_off(info, DRM_MODE_DPMS_STANDBY); |
| break; |
| /* Display: Off; HSync: Off, VSync: On */ |
| case FB_BLANK_HSYNC_SUSPEND: |
| drm_fb_helper_off(info, DRM_MODE_DPMS_STANDBY); |
| break; |
| /* Display: Off; HSync: On, VSync: Off */ |
| case FB_BLANK_VSYNC_SUSPEND: |
| drm_fb_helper_off(info, DRM_MODE_DPMS_SUSPEND); |
| break; |
| /* Display: Off; HSync: Off, VSync: Off */ |
| case FB_BLANK_POWERDOWN: |
| drm_fb_helper_off(info, DRM_MODE_DPMS_OFF); |
| break; |
| } |
| return 0; |
| } |
| EXPORT_SYMBOL(drm_fb_helper_blank); |
| |
| static void drm_fb_helper_crtc_free(struct drm_fb_helper *helper) |
| { |
| int i; |
| |
| for (i = 0; i < helper->connector_count; i++) |
| kfree(helper->connector_info[i]); |
| kfree(helper->connector_info); |
| for (i = 0; i < helper->crtc_count; i++) |
| kfree(helper->crtc_info[i].mode_set.connectors); |
| kfree(helper->crtc_info); |
| } |
| |
| int drm_fb_helper_init(struct drm_device *dev, |
| struct drm_fb_helper *fb_helper, |
| int crtc_count, int max_conn_count) |
| { |
| struct drm_crtc *crtc; |
| int ret = 0; |
| int i; |
| |
| fb_helper->dev = dev; |
| |
| INIT_LIST_HEAD(&fb_helper->kernel_fb_list); |
| |
| fb_helper->crtc_info = kcalloc(crtc_count, sizeof(struct drm_fb_helper_crtc), GFP_KERNEL); |
| if (!fb_helper->crtc_info) |
| return -ENOMEM; |
| |
| fb_helper->crtc_count = crtc_count; |
| fb_helper->connector_info = kcalloc(dev->mode_config.num_connector, sizeof(struct drm_fb_helper_connector *), GFP_KERNEL); |
| if (!fb_helper->connector_info) { |
| kfree(fb_helper->crtc_info); |
| return -ENOMEM; |
| } |
| fb_helper->connector_count = 0; |
| |
| for (i = 0; i < crtc_count; i++) { |
| fb_helper->crtc_info[i].mode_set.connectors = |
| kcalloc(max_conn_count, |
| sizeof(struct drm_connector *), |
| GFP_KERNEL); |
| |
| if (!fb_helper->crtc_info[i].mode_set.connectors) { |
| ret = -ENOMEM; |
| goto out_free; |
| } |
| fb_helper->crtc_info[i].mode_set.num_connectors = 0; |
| } |
| |
| i = 0; |
| list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) { |
| fb_helper->crtc_info[i].crtc_id = crtc->base.id; |
| fb_helper->crtc_info[i].mode_set.crtc = crtc; |
| i++; |
| } |
| fb_helper->conn_limit = max_conn_count; |
| return 0; |
| out_free: |
| drm_fb_helper_crtc_free(fb_helper); |
| return -ENOMEM; |
| } |
| EXPORT_SYMBOL(drm_fb_helper_init); |
| |
| void drm_fb_helper_fini(struct drm_fb_helper *fb_helper) |
| { |
| if (!list_empty(&fb_helper->kernel_fb_list)) { |
| list_del(&fb_helper->kernel_fb_list); |
| if (list_empty(&kernel_fb_helper_list)) { |
| printk(KERN_INFO "drm: unregistered panic notifier\n"); |
| atomic_notifier_chain_unregister(&panic_notifier_list, |
| &paniced); |
| unregister_sysrq_key('v', &sysrq_drm_fb_helper_restore_op); |
| } |
| } |
| |
| drm_fb_helper_crtc_free(fb_helper); |
| |
| } |
| EXPORT_SYMBOL(drm_fb_helper_fini); |
| |
| static int setcolreg(struct drm_crtc *crtc, u16 red, u16 green, |
| u16 blue, u16 regno, struct fb_info *info) |
| { |
| struct drm_fb_helper *fb_helper = info->par; |
| struct drm_framebuffer *fb = fb_helper->fb; |
| int pindex; |
| |
| if (info->fix.visual == FB_VISUAL_TRUECOLOR) { |
| u32 *palette; |
| u32 value; |
| /* place color in psuedopalette */ |
| if (regno > 16) |
| return -EINVAL; |
| palette = (u32 *)info->pseudo_palette; |
| red >>= (16 - info->var.red.length); |
| green >>= (16 - info->var.green.length); |
| blue >>= (16 - info->var.blue.length); |
| value = (red << info->var.red.offset) | |
| (green << info->var.green.offset) | |
| (blue << info->var.blue.offset); |
| if (info->var.transp.length > 0) { |
| u32 mask = (1 << info->var.transp.length) - 1; |
| mask <<= info->var.transp.offset; |
| value |= mask; |
| } |
| palette[regno] = value; |
| return 0; |
| } |
| |
| pindex = regno; |
| |
| if (fb->bits_per_pixel == 16) { |
| pindex = regno << 3; |
| |
| if (fb->depth == 16 && regno > 63) |
| return -EINVAL; |
| if (fb->depth == 15 && regno > 31) |
| return -EINVAL; |
| |
| if (fb->depth == 16) { |
| u16 r, g, b; |
| int i; |
| if (regno < 32) { |
| for (i = 0; i < 8; i++) |
| fb_helper->funcs->gamma_set(crtc, red, |
| green, blue, pindex + i); |
| } |
| |
| fb_helper->funcs->gamma_get(crtc, &r, |
| &g, &b, |
| pindex >> 1); |
| |
| for (i = 0; i < 4; i++) |
| fb_helper->funcs->gamma_set(crtc, r, |
| green, b, |
| (pindex >> 1) + i); |
| } |
| } |
| |
| if (fb->depth != 16) |
| fb_helper->funcs->gamma_set(crtc, red, green, blue, pindex); |
| return 0; |
| } |
| |
| int drm_fb_helper_setcmap(struct fb_cmap *cmap, struct fb_info *info) |
| { |
| struct drm_fb_helper *fb_helper = info->par; |
| struct drm_crtc_helper_funcs *crtc_funcs; |
| u16 *red, *green, *blue, *transp; |
| struct drm_crtc *crtc; |
| int i, j, rc = 0; |
| int start; |
| |
| for (i = 0; i < fb_helper->crtc_count; i++) { |
| crtc = fb_helper->crtc_info[i].mode_set.crtc; |
| crtc_funcs = crtc->helper_private; |
| |
| red = cmap->red; |
| green = cmap->green; |
| blue = cmap->blue; |
| transp = cmap->transp; |
| start = cmap->start; |
| |
| for (j = 0; j < cmap->len; j++) { |
| u16 hred, hgreen, hblue, htransp = 0xffff; |
| |
| hred = *red++; |
| hgreen = *green++; |
| hblue = *blue++; |
| |
| if (transp) |
| htransp = *transp++; |
| |
| rc = setcolreg(crtc, hred, hgreen, hblue, start++, info); |
| if (rc) |
| return rc; |
| } |
| crtc_funcs->load_lut(crtc); |
| } |
| return rc; |
| } |
| EXPORT_SYMBOL(drm_fb_helper_setcmap); |
| |
| int drm_fb_helper_check_var(struct fb_var_screeninfo *var, |
| struct fb_info *info) |
| { |
| struct drm_fb_helper *fb_helper = info->par; |
| struct drm_framebuffer *fb = fb_helper->fb; |
| int depth; |
| |
| if (var->pixclock != 0 || in_dbg_master()) |
| return -EINVAL; |
| |
| /* Need to resize the fb object !!! */ |
| if (var->bits_per_pixel > fb->bits_per_pixel || var->xres > fb->width || var->yres > fb->height) { |
| DRM_DEBUG("fb userspace requested width/height/bpp is greater than current fb " |
| "object %dx%d-%d > %dx%d-%d\n", var->xres, var->yres, var->bits_per_pixel, |
| fb->width, fb->height, fb->bits_per_pixel); |
| return -EINVAL; |
| } |
| |
| switch (var->bits_per_pixel) { |
| case 16: |
| depth = (var->green.length == 6) ? 16 : 15; |
| break; |
| case 32: |
| depth = (var->transp.length > 0) ? 32 : 24; |
| break; |
| default: |
| depth = var->bits_per_pixel; |
| break; |
| } |
| |
| switch (depth) { |
| case 8: |
| var->red.offset = 0; |
| var->green.offset = 0; |
| var->blue.offset = 0; |
| var->red.length = 8; |
| var->green.length = 8; |
| var->blue.length = 8; |
| var->transp.length = 0; |
| var->transp.offset = 0; |
| break; |
| case 15: |
| var->red.offset = 10; |
| var->green.offset = 5; |
| var->blue.offset = 0; |
| var->red.length = 5; |
| var->green.length = 5; |
| var->blue.length = 5; |
| var->transp.length = 1; |
| var->transp.offset = 15; |
| break; |
| case 16: |
| var->red.offset = 11; |
| var->green.offset = 5; |
| var->blue.offset = 0; |
| var->red.length = 5; |
| var->green.length = 6; |
| var->blue.length = 5; |
| var->transp.length = 0; |
| var->transp.offset = 0; |
| break; |
| case 24: |
| var->red.offset = 16; |
| var->green.offset = 8; |
| var->blue.offset = 0; |
| var->red.length = 8; |
| var->green.length = 8; |
| var->blue.length = 8; |
| var->transp.length = 0; |
| var->transp.offset = 0; |
| break; |
| case 32: |
| var->red.offset = 16; |
| var->green.offset = 8; |
| var->blue.offset = 0; |
| var->red.length = 8; |
| var->green.length = 8; |
| var->blue.length = 8; |
| var->transp.length = 8; |
| var->transp.offset = 24; |
| break; |
| default: |
| return -EINVAL; |
| } |
| return 0; |
| } |
| EXPORT_SYMBOL(drm_fb_helper_check_var); |
| |
| /* this will let fbcon do the mode init */ |
| int drm_fb_helper_set_par(struct fb_info *info) |
| { |
| struct drm_fb_helper *fb_helper = info->par; |
| struct drm_device *dev = fb_helper->dev; |
| struct fb_var_screeninfo *var = &info->var; |
| struct drm_crtc *crtc; |
| int ret; |
| int i; |
| |
| if (var->pixclock != 0) { |
| DRM_ERROR("PIXEL CLOCK SET\n"); |
| return -EINVAL; |
| } |
| |
| mutex_lock(&dev->mode_config.mutex); |
| for (i = 0; i < fb_helper->crtc_count; i++) { |
| crtc = fb_helper->crtc_info[i].mode_set.crtc; |
| ret = crtc->funcs->set_config(&fb_helper->crtc_info[i].mode_set); |
| if (ret) { |
| mutex_unlock(&dev->mode_config.mutex); |
| return ret; |
| } |
| } |
| mutex_unlock(&dev->mode_config.mutex); |
| |
| if (fb_helper->delayed_hotplug) { |
| fb_helper->delayed_hotplug = false; |
| drm_fb_helper_hotplug_event(fb_helper); |
| } |
| return 0; |
| } |
| EXPORT_SYMBOL(drm_fb_helper_set_par); |
| |
| int drm_fb_helper_pan_display(struct fb_var_screeninfo *var, |
| struct fb_info *info) |
| { |
| struct drm_fb_helper *fb_helper = info->par; |
| struct drm_device *dev = fb_helper->dev; |
| struct drm_mode_set *modeset; |
| struct drm_crtc *crtc; |
| int ret = 0; |
| int i; |
| |
| mutex_lock(&dev->mode_config.mutex); |
| for (i = 0; i < fb_helper->crtc_count; i++) { |
| crtc = fb_helper->crtc_info[i].mode_set.crtc; |
| |
| modeset = &fb_helper->crtc_info[i].mode_set; |
| |
| modeset->x = var->xoffset; |
| modeset->y = var->yoffset; |
| |
| if (modeset->num_connectors) { |
| ret = crtc->funcs->set_config(modeset); |
| if (!ret) { |
| info->var.xoffset = var->xoffset; |
| info->var.yoffset = var->yoffset; |
| } |
| } |
| } |
| mutex_unlock(&dev->mode_config.mutex); |
| return ret; |
| } |
| EXPORT_SYMBOL(drm_fb_helper_pan_display); |
| |
| int drm_fb_helper_single_fb_probe(struct drm_fb_helper *fb_helper, |
| int preferred_bpp) |
| { |
| int new_fb = 0; |
| int crtc_count = 0; |
| int i; |
| struct fb_info *info; |
| struct drm_fb_helper_surface_size sizes; |
| int gamma_size = 0; |
| |
| memset(&sizes, 0, sizeof(struct drm_fb_helper_surface_size)); |
| sizes.surface_depth = 24; |
| sizes.surface_bpp = 32; |
| sizes.fb_width = (unsigned)-1; |
| sizes.fb_height = (unsigned)-1; |
| |
| /* if driver picks 8 or 16 by default use that |
| for both depth/bpp */ |
| if (preferred_bpp != sizes.surface_bpp) { |
| sizes.surface_depth = sizes.surface_bpp = preferred_bpp; |
| } |
| /* first up get a count of crtcs now in use and new min/maxes width/heights */ |
| for (i = 0; i < fb_helper->connector_count; i++) { |
| struct drm_fb_helper_connector *fb_helper_conn = fb_helper->connector_info[i]; |
| struct drm_cmdline_mode *cmdline_mode; |
| |
| cmdline_mode = &fb_helper_conn->cmdline_mode; |
| |
| if (cmdline_mode->bpp_specified) { |
| switch (cmdline_mode->bpp) { |
| case 8: |
| sizes.surface_depth = sizes.surface_bpp = 8; |
| break; |
| case 15: |
| sizes.surface_depth = 15; |
| sizes.surface_bpp = 16; |
| break; |
| case 16: |
| sizes.surface_depth = sizes.surface_bpp = 16; |
| break; |
| case 24: |
| sizes.surface_depth = sizes.surface_bpp = 24; |
| break; |
| case 32: |
| sizes.surface_depth = 24; |
| sizes.surface_bpp = 32; |
| break; |
| } |
| break; |
| } |
| } |
| |
| crtc_count = 0; |
| for (i = 0; i < fb_helper->crtc_count; i++) { |
| struct drm_display_mode *desired_mode; |
| desired_mode = fb_helper->crtc_info[i].desired_mode; |
| |
| if (desired_mode) { |
| if (gamma_size == 0) |
| gamma_size = fb_helper->crtc_info[i].mode_set.crtc->gamma_size; |
| if (desired_mode->hdisplay < sizes.fb_width) |
| sizes.fb_width = desired_mode->hdisplay; |
| if (desired_mode->vdisplay < sizes.fb_height) |
| sizes.fb_height = desired_mode->vdisplay; |
| if (desired_mode->hdisplay > sizes.surface_width) |
| sizes.surface_width = desired_mode->hdisplay; |
| if (desired_mode->vdisplay > sizes.surface_height) |
| sizes.surface_height = desired_mode->vdisplay; |
| crtc_count++; |
| } |
| } |
| |
| if (crtc_count == 0 || sizes.fb_width == -1 || sizes.fb_height == -1) { |
| /* hmm everyone went away - assume VGA cable just fell out |
| and will come back later. */ |
| DRM_INFO("Cannot find any crtc or sizes - going 1024x768\n"); |
| sizes.fb_width = sizes.surface_width = 1024; |
| sizes.fb_height = sizes.surface_height = 768; |
| } |
| |
| /* push down into drivers */ |
| new_fb = (*fb_helper->funcs->fb_probe)(fb_helper, &sizes); |
| if (new_fb < 0) |
| return new_fb; |
| |
| info = fb_helper->fbdev; |
| |
| /* set the fb pointer */ |
| for (i = 0; i < fb_helper->crtc_count; i++) { |
| fb_helper->crtc_info[i].mode_set.fb = fb_helper->fb; |
| } |
| |
| if (new_fb) { |
| info->var.pixclock = 0; |
| if (register_framebuffer(info) < 0) { |
| return -EINVAL; |
| } |
| |
| printk(KERN_INFO "fb%d: %s frame buffer device\n", info->node, |
| info->fix.id); |
| |
| } else { |
| drm_fb_helper_set_par(info); |
| } |
| |
| /* Switch back to kernel console on panic */ |
| /* multi card linked list maybe */ |
| if (list_empty(&kernel_fb_helper_list)) { |
| printk(KERN_INFO "drm: registered panic notifier\n"); |
| atomic_notifier_chain_register(&panic_notifier_list, |
| &paniced); |
| register_sysrq_key('v', &sysrq_drm_fb_helper_restore_op); |
| } |
| if (new_fb) |
| list_add(&fb_helper->kernel_fb_list, &kernel_fb_helper_list); |
| |
| return 0; |
| } |
| EXPORT_SYMBOL(drm_fb_helper_single_fb_probe); |
| |
| void drm_fb_helper_fill_fix(struct fb_info *info, uint32_t pitch, |
| uint32_t depth) |
| { |
| info->fix.type = FB_TYPE_PACKED_PIXELS; |
| info->fix.visual = depth == 8 ? FB_VISUAL_PSEUDOCOLOR : |
| FB_VISUAL_TRUECOLOR; |
| info->fix.mmio_start = 0; |
| info->fix.mmio_len = 0; |
| info->fix.type_aux = 0; |
| info->fix.xpanstep = 1; /* doing it in hw */ |
| info->fix.ypanstep = 1; /* doing it in hw */ |
| info->fix.ywrapstep = 0; |
| info->fix.accel = FB_ACCEL_NONE; |
| info->fix.type_aux = 0; |
| |
| info->fix.line_length = pitch; |
| return; |
| } |
| EXPORT_SYMBOL(drm_fb_helper_fill_fix); |
| |
| void drm_fb_helper_fill_var(struct fb_info *info, struct drm_fb_helper *fb_helper, |
| uint32_t fb_width, uint32_t fb_height) |
| { |
| struct drm_framebuffer *fb = fb_helper->fb; |
| info->pseudo_palette = fb_helper->pseudo_palette; |
| info->var.xres_virtual = fb->width; |
| info->var.yres_virtual = fb->height; |
| info->var.bits_per_pixel = fb->bits_per_pixel; |
| info->var.accel_flags = FB_ACCELF_TEXT; |
| info->var.xoffset = 0; |
| info->var.yoffset = 0; |
| info->var.activate = FB_ACTIVATE_NOW; |
| info->var.height = -1; |
| info->var.width = -1; |
| |
| switch (fb->depth) { |
| case 8: |
| info->var.red.offset = 0; |
| info->var.green.offset = 0; |
| info->var.blue.offset = 0; |
| info->var.red.length = 8; /* 8bit DAC */ |
| info->var.green.length = 8; |
| info->var.blue.length = 8; |
| info->var.transp.offset = 0; |
| info->var.transp.length = 0; |
| break; |
| case 15: |
| info->var.red.offset = 10; |
| info->var.green.offset = 5; |
| info->var.blue.offset = 0; |
| info->var.red.length = 5; |
| info->var.green.length = 5; |
| info->var.blue.length = 5; |
| info->var.transp.offset = 15; |
| info->var.transp.length = 1; |
| break; |
| case 16: |
| info->var.red.offset = 11; |
| info->var.green.offset = 5; |
| info->var.blue.offset = 0; |
| info->var.red.length = 5; |
| info->var.green.length = 6; |
| info->var.blue.length = 5; |
| info->var.transp.offset = 0; |
| break; |
| case 24: |
| info->var.red.offset = 16; |
| info->var.green.offset = 8; |
| info->var.blue.offset = 0; |
| info->var.red.length = 8; |
| info->var.green.length = 8; |
| info->var.blue.length = 8; |
| info->var.transp.offset = 0; |
| info->var.transp.length = 0; |
| break; |
| case 32: |
| info->var.red.offset = 16; |
| info->var.green.offset = 8; |
| info->var.blue.offset = 0; |
| info->var.red.length = 8; |
| info->var.green.length = 8; |
| info->var.blue.length = 8; |
| info->var.transp.offset = 24; |
| info->var.transp.length = 8; |
| break; |
| default: |
| break; |
| } |
| |
| info->var.xres = fb_width; |
| info->var.yres = fb_height; |
| } |
| EXPORT_SYMBOL(drm_fb_helper_fill_var); |
| |
| static int drm_fb_helper_probe_connector_modes(struct drm_fb_helper *fb_helper, |
| uint32_t maxX, |
| uint32_t maxY) |
| { |
| struct drm_connector *connector; |
| int count = 0; |
| int i; |
| |
| for (i = 0; i < fb_helper->connector_count; i++) { |
| connector = fb_helper->connector_info[i]->connector; |
| count += connector->funcs->fill_modes(connector, maxX, maxY); |
| } |
| |
| return count; |
| } |
| |
| static struct drm_display_mode *drm_has_preferred_mode(struct drm_fb_helper_connector *fb_connector, int width, int height) |
| { |
| struct drm_display_mode *mode; |
| |
| list_for_each_entry(mode, &fb_connector->connector->modes, head) { |
| if (drm_mode_width(mode) > width || |
| drm_mode_height(mode) > height) |
| continue; |
| if (mode->type & DRM_MODE_TYPE_PREFERRED) |
| return mode; |
| } |
| return NULL; |
| } |
| |
| static bool drm_has_cmdline_mode(struct drm_fb_helper_connector *fb_connector) |
| { |
| struct drm_cmdline_mode *cmdline_mode; |
| cmdline_mode = &fb_connector->cmdline_mode; |
| return cmdline_mode->specified; |
| } |
| |
| static struct drm_display_mode *drm_pick_cmdline_mode(struct drm_fb_helper_connector *fb_helper_conn, |
| int width, int height) |
| { |
| struct drm_cmdline_mode *cmdline_mode; |
| struct drm_display_mode *mode = NULL; |
| |
| cmdline_mode = &fb_helper_conn->cmdline_mode; |
| if (cmdline_mode->specified == false) |
| return mode; |
| |
| /* attempt to find a matching mode in the list of modes |
| * we have gotten so far, if not add a CVT mode that conforms |
| */ |
| if (cmdline_mode->rb || cmdline_mode->margins) |
| goto create_mode; |
| |
| list_for_each_entry(mode, &fb_helper_conn->connector->modes, head) { |
| /* check width/height */ |
| if (mode->hdisplay != cmdline_mode->xres || |
| mode->vdisplay != cmdline_mode->yres) |
| continue; |
| |
| if (cmdline_mode->refresh_specified) { |
| if (mode->vrefresh != cmdline_mode->refresh) |
| continue; |
| } |
| |
| if (cmdline_mode->interlace) { |
| if (!(mode->flags & DRM_MODE_FLAG_INTERLACE)) |
| continue; |
| } |
| return mode; |
| } |
| |
| create_mode: |
| mode = drm_mode_create_from_cmdline_mode(fb_helper_conn->connector->dev, |
| cmdline_mode); |
| list_add(&mode->head, &fb_helper_conn->connector->modes); |
| return mode; |
| } |
| |
| static bool drm_connector_enabled(struct drm_connector *connector, bool strict) |
| { |
| bool enable; |
| |
| if (strict) { |
| enable = connector->status == connector_status_connected; |
| } else { |
| enable = connector->status != connector_status_disconnected; |
| } |
| return enable; |
| } |
| |
| static void drm_enable_connectors(struct drm_fb_helper *fb_helper, |
| bool *enabled) |
| { |
| bool any_enabled = false; |
| struct drm_connector *connector; |
| int i = 0; |
| |
| for (i = 0; i < fb_helper->connector_count; i++) { |
| connector = fb_helper->connector_info[i]->connector; |
| enabled[i] = drm_connector_enabled(connector, true); |
| DRM_DEBUG_KMS("connector %d enabled? %s\n", connector->base.id, |
| enabled[i] ? "yes" : "no"); |
| any_enabled |= enabled[i]; |
| } |
| |
| if (any_enabled) |
| return; |
| |
| for (i = 0; i < fb_helper->connector_count; i++) { |
| connector = fb_helper->connector_info[i]->connector; |
| enabled[i] = drm_connector_enabled(connector, false); |
| } |
| } |
| |
| static bool drm_target_cloned(struct drm_fb_helper *fb_helper, |
| struct drm_display_mode **modes, |
| bool *enabled, int width, int height) |
| { |
| int count, i, j; |
| bool can_clone = false; |
| struct drm_fb_helper_connector *fb_helper_conn; |
| struct drm_display_mode *dmt_mode, *mode; |
| |
| /* only contemplate cloning in the single crtc case */ |
| if (fb_helper->crtc_count > 1) |
| return false; |
| |
| count = 0; |
| for (i = 0; i < fb_helper->connector_count; i++) { |
| if (enabled[i]) |
| count++; |
| } |
| |
| /* only contemplate cloning if more than one connector is enabled */ |
| if (count <= 1) |
| return false; |
| |
| /* check the command line or if nothing common pick 1024x768 */ |
| can_clone = true; |
| for (i = 0; i < fb_helper->connector_count; i++) { |
| if (!enabled[i]) |
| continue; |
| fb_helper_conn = fb_helper->connector_info[i]; |
| modes[i] = drm_pick_cmdline_mode(fb_helper_conn, width, height); |
| if (!modes[i]) { |
| can_clone = false; |
| break; |
| } |
| for (j = 0; j < i; j++) { |
| if (!enabled[j]) |
| continue; |
| if (!drm_mode_equal(modes[j], modes[i])) |
| can_clone = false; |
| } |
| } |
| |
| if (can_clone) { |
| DRM_DEBUG_KMS("can clone using command line\n"); |
| return true; |
| } |
| |
| /* try and find a 1024x768 mode on each connector */ |
| can_clone = true; |
| dmt_mode = drm_mode_find_dmt(fb_helper->dev, 1024, 768, 60); |
| |
| for (i = 0; i < fb_helper->connector_count; i++) { |
| |
| if (!enabled[i]) |
| continue; |
| |
| fb_helper_conn = fb_helper->connector_info[i]; |
| list_for_each_entry(mode, &fb_helper_conn->connector->modes, head) { |
| if (drm_mode_equal(mode, dmt_mode)) |
| modes[i] = mode; |
| } |
| if (!modes[i]) |
| can_clone = false; |
| } |
| |
| if (can_clone) { |
| DRM_DEBUG_KMS("can clone using 1024x768\n"); |
| return true; |
| } |
| DRM_INFO("kms: can't enable cloning when we probably wanted to.\n"); |
| return false; |
| } |
| |
| static bool drm_target_preferred(struct drm_fb_helper *fb_helper, |
| struct drm_display_mode **modes, |
| bool *enabled, int width, int height) |
| { |
| struct drm_fb_helper_connector *fb_helper_conn; |
| int i; |
| |
| for (i = 0; i < fb_helper->connector_count; i++) { |
| fb_helper_conn = fb_helper->connector_info[i]; |
| |
| if (enabled[i] == false) |
| continue; |
| |
| DRM_DEBUG_KMS("looking for cmdline mode on connector %d\n", |
| fb_helper_conn->connector->base.id); |
| |
| /* got for command line mode first */ |
| modes[i] = drm_pick_cmdline_mode(fb_helper_conn, width, height); |
| if (!modes[i]) { |
| DRM_DEBUG_KMS("looking for preferred mode on connector %d\n", |
| fb_helper_conn->connector->base.id); |
| modes[i] = drm_has_preferred_mode(fb_helper_conn, width, height); |
| } |
| /* No preferred modes, pick one off the list */ |
| if (!modes[i] && !list_empty(&fb_helper_conn->connector->modes)) { |
| list_for_each_entry(modes[i], &fb_helper_conn->connector->modes, head) |
| break; |
| } |
| DRM_DEBUG_KMS("found mode %s\n", modes[i] ? modes[i]->name : |
| "none"); |
| } |
| return true; |
| } |
| |
| static int drm_pick_crtcs(struct drm_fb_helper *fb_helper, |
| struct drm_fb_helper_crtc **best_crtcs, |
| struct drm_display_mode **modes, |
| int n, int width, int height) |
| { |
| int c, o; |
| struct drm_device *dev = fb_helper->dev; |
| struct drm_connector *connector; |
| struct drm_connector_helper_funcs *connector_funcs; |
| struct drm_encoder *encoder; |
| struct drm_fb_helper_crtc *best_crtc; |
| int my_score, best_score, score; |
| struct drm_fb_helper_crtc **crtcs, *crtc; |
| struct drm_fb_helper_connector *fb_helper_conn; |
| |
| if (n == fb_helper->connector_count) |
| return 0; |
| |
| fb_helper_conn = fb_helper->connector_info[n]; |
| connector = fb_helper_conn->connector; |
| |
| best_crtcs[n] = NULL; |
| best_crtc = NULL; |
| best_score = drm_pick_crtcs(fb_helper, best_crtcs, modes, n+1, width, height); |
| if (modes[n] == NULL) |
| return best_score; |
| |
| crtcs = kzalloc(dev->mode_config.num_connector * |
| sizeof(struct drm_fb_helper_crtc *), GFP_KERNEL); |
| if (!crtcs) |
| return best_score; |
| |
| my_score = 1; |
| if (connector->status == connector_status_connected) |
| my_score++; |
| if (drm_has_cmdline_mode(fb_helper_conn)) |
| my_score++; |
| if (drm_has_preferred_mode(fb_helper_conn, width, height)) |
| my_score++; |
| |
| connector_funcs = connector->helper_private; |
| encoder = connector_funcs->best_encoder(connector); |
| if (!encoder) |
| goto out; |
| |
| /* select a crtc for this connector and then attempt to configure |
| remaining connectors */ |
| for (c = 0; c < fb_helper->crtc_count; c++) { |
| crtc = &fb_helper->crtc_info[c]; |
| |
| if ((encoder->possible_crtcs & (1 << c)) == 0) { |
| continue; |
| } |
| |
| for (o = 0; o < n; o++) |
| if (best_crtcs[o] == crtc) |
| break; |
| |
| if (o < n) { |
| /* ignore cloning unless only a single crtc */ |
| if (fb_helper->crtc_count > 1) |
| continue; |
| |
| if (!drm_mode_equal(modes[o], modes[n])) |
| continue; |
| } |
| |
| crtcs[n] = crtc; |
| memcpy(crtcs, best_crtcs, n * sizeof(struct drm_fb_helper_crtc *)); |
| score = my_score + drm_pick_crtcs(fb_helper, crtcs, modes, n + 1, |
| width, height); |
| if (score > best_score) { |
| best_crtc = crtc; |
| best_score = score; |
| memcpy(best_crtcs, crtcs, |
| dev->mode_config.num_connector * |
| sizeof(struct drm_fb_helper_crtc *)); |
| } |
| } |
| out: |
| kfree(crtcs); |
| return best_score; |
| } |
| |
| static void drm_setup_crtcs(struct drm_fb_helper *fb_helper) |
| { |
| struct drm_device *dev = fb_helper->dev; |
| struct drm_fb_helper_crtc **crtcs; |
| struct drm_display_mode **modes; |
| struct drm_encoder *encoder; |
| struct drm_mode_set *modeset; |
| bool *enabled; |
| int width, height; |
| int i, ret; |
| |
| DRM_DEBUG_KMS("\n"); |
| |
| width = dev->mode_config.max_width; |
| height = dev->mode_config.max_height; |
| |
| /* clean out all the encoder/crtc combos */ |
| list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) { |
| encoder->crtc = NULL; |
| } |
| |
| crtcs = kcalloc(dev->mode_config.num_connector, |
| sizeof(struct drm_fb_helper_crtc *), GFP_KERNEL); |
| modes = kcalloc(dev->mode_config.num_connector, |
| sizeof(struct drm_display_mode *), GFP_KERNEL); |
| enabled = kcalloc(dev->mode_config.num_connector, |
| sizeof(bool), GFP_KERNEL); |
| |
| drm_enable_connectors(fb_helper, enabled); |
| |
| ret = drm_target_cloned(fb_helper, modes, enabled, width, height); |
| if (!ret) { |
| ret = drm_target_preferred(fb_helper, modes, enabled, width, height); |
| if (!ret) |
| DRM_ERROR("Unable to find initial modes\n"); |
| } |
| |
| DRM_DEBUG_KMS("picking CRTCs for %dx%d config\n", width, height); |
| |
| drm_pick_crtcs(fb_helper, crtcs, modes, 0, width, height); |
| |
| /* need to set the modesets up here for use later */ |
| /* fill out the connector<->crtc mappings into the modesets */ |
| for (i = 0; i < fb_helper->crtc_count; i++) { |
| modeset = &fb_helper->crtc_info[i].mode_set; |
| modeset->num_connectors = 0; |
| } |
| |
| for (i = 0; i < fb_helper->connector_count; i++) { |
| struct drm_display_mode *mode = modes[i]; |
| struct drm_fb_helper_crtc *fb_crtc = crtcs[i]; |
| modeset = &fb_crtc->mode_set; |
| |
| if (mode && fb_crtc) { |
| DRM_DEBUG_KMS("desired mode %s set on crtc %d\n", |
| mode->name, fb_crtc->mode_set.crtc->base.id); |
| fb_crtc->desired_mode = mode; |
| if (modeset->mode) |
| drm_mode_destroy(dev, modeset->mode); |
| modeset->mode = drm_mode_duplicate(dev, |
| fb_crtc->desired_mode); |
| modeset->connectors[modeset->num_connectors++] = fb_helper->connector_info[i]->connector; |
| } |
| } |
| |
| kfree(crtcs); |
| kfree(modes); |
| kfree(enabled); |
| } |
| |
| /** |
| * drm_helper_initial_config - setup a sane initial connector configuration |
| * @dev: DRM device |
| * |
| * LOCKING: |
| * Called at init time, must take mode config lock. |
| * |
| * Scan the CRTCs and connectors and try to put together an initial setup. |
| * At the moment, this is a cloned configuration across all heads with |
| * a new framebuffer object as the backing store. |
| * |
| * RETURNS: |
| * Zero if everything went ok, nonzero otherwise. |
| */ |
| bool drm_fb_helper_initial_config(struct drm_fb_helper *fb_helper, int bpp_sel) |
| { |
| struct drm_device *dev = fb_helper->dev; |
| int count = 0; |
| |
| /* disable all the possible outputs/crtcs before entering KMS mode */ |
| drm_helper_disable_unused_functions(fb_helper->dev); |
| |
| drm_fb_helper_parse_command_line(fb_helper); |
| |
| count = drm_fb_helper_probe_connector_modes(fb_helper, |
| dev->mode_config.max_width, |
| dev->mode_config.max_height); |
| /* |
| * we shouldn't end up with no modes here. |
| */ |
| if (count == 0) { |
| printk(KERN_INFO "No connectors reported connected with modes\n"); |
| } |
| drm_setup_crtcs(fb_helper); |
| |
| return drm_fb_helper_single_fb_probe(fb_helper, bpp_sel); |
| } |
| EXPORT_SYMBOL(drm_fb_helper_initial_config); |
| |
| /** |
| * drm_fb_helper_hotplug_event - respond to a hotplug notification by |
| * probing all the outputs attached to the fb. |
| * @fb_helper: the drm_fb_helper |
| * |
| * LOCKING: |
| * Called at runtime, must take mode config lock. |
| * |
| * Scan the connectors attached to the fb_helper and try to put together a |
| * setup after *notification of a change in output configuration. |
| * |
| * RETURNS: |
| * 0 on success and a non-zero error code otherwise. |
| */ |
| int drm_fb_helper_hotplug_event(struct drm_fb_helper *fb_helper) |
| { |
| struct drm_device *dev = fb_helper->dev; |
| int count = 0; |
| u32 max_width, max_height, bpp_sel; |
| bool bound = false, crtcs_bound = false; |
| struct drm_crtc *crtc; |
| |
| if (!fb_helper->fb) |
| return 0; |
| |
| mutex_lock(&dev->mode_config.mutex); |
| list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) { |
| if (crtc->fb) |
| crtcs_bound = true; |
| if (crtc->fb == fb_helper->fb) |
| bound = true; |
| } |
| |
| if (!bound && crtcs_bound) { |
| fb_helper->delayed_hotplug = true; |
| mutex_unlock(&dev->mode_config.mutex); |
| return 0; |
| } |
| DRM_DEBUG_KMS("\n"); |
| |
| max_width = fb_helper->fb->width; |
| max_height = fb_helper->fb->height; |
| bpp_sel = fb_helper->fb->bits_per_pixel; |
| |
| count = drm_fb_helper_probe_connector_modes(fb_helper, max_width, |
| max_height); |
| drm_setup_crtcs(fb_helper); |
| mutex_unlock(&dev->mode_config.mutex); |
| |
| return drm_fb_helper_single_fb_probe(fb_helper, bpp_sel); |
| } |
| EXPORT_SYMBOL(drm_fb_helper_hotplug_event); |
| |
| /* The Kconfig DRM_KMS_HELPER selects FRAMEBUFFER_CONSOLE (if !EXPERT) |
| * but the module doesn't depend on any fb console symbols. At least |
| * attempt to load fbcon to avoid leaving the system without a usable console. |
| */ |
| #if defined(CONFIG_FRAMEBUFFER_CONSOLE_MODULE) && !defined(CONFIG_EXPERT) |
| static int __init drm_fb_helper_modinit(void) |
| { |
| const char *name = "fbcon"; |
| struct module *fbcon; |
| |
| mutex_lock(&module_mutex); |
| fbcon = find_module(name); |
| mutex_unlock(&module_mutex); |
| |
| if (!fbcon) |
| request_module_nowait(name); |
| return 0; |
| } |
| |
| module_init(drm_fb_helper_modinit); |
| #endif |