/* * Copyright © 2007 David Airlie * * Permission is hereby granted, free of charge, to any person obtaining a * copy of this software and associated documentation files (the "Software"), * to deal in the Software without restriction, including without limitation * the rights to use, copy, modify, merge, publish, distribute, sublicense, * and/or sell copies of the Software, and to permit persons to whom the * Software is furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice (including the next * paragraph) shall be included in all copies or substantial portions of the * Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER * DEALINGS IN THE SOFTWARE. * * Authors: * David Airlie */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include "intel_drv.h" #include #include "i915_drv.h" static int intel_fbdev_set_par(struct fb_info *info) { struct drm_fb_helper *fb_helper = info->par; struct intel_fbdev *ifbdev = container_of(fb_helper, struct intel_fbdev, helper); int ret; ret = drm_fb_helper_set_par(info); if (ret == 0) { /* * FIXME: fbdev presumes that all callbacks also work from * atomic contexts and relies on that for emergency oops * printing. KMS totally doesn't do that and the locking here is * by far not the only place this goes wrong. Ignore this for * now until we solve this for real. */ mutex_lock(&fb_helper->dev->struct_mutex); ret = i915_gem_object_set_to_gtt_domain(ifbdev->fb->obj, true); mutex_unlock(&fb_helper->dev->struct_mutex); } return ret; } static int intel_fbdev_blank(int blank, struct fb_info *info) { struct drm_fb_helper *fb_helper = info->par; struct intel_fbdev *ifbdev = container_of(fb_helper, struct intel_fbdev, helper); int ret; ret = drm_fb_helper_blank(blank, info); if (ret == 0) { /* * FIXME: fbdev presumes that all callbacks also work from * atomic contexts and relies on that for emergency oops * printing. KMS totally doesn't do that and the locking here is * by far not the only place this goes wrong. Ignore this for * now until we solve this for real. */ mutex_lock(&fb_helper->dev->struct_mutex); intel_fb_obj_invalidate(ifbdev->fb->obj, NULL, ORIGIN_GTT); mutex_unlock(&fb_helper->dev->struct_mutex); } return ret; } static struct fb_ops intelfb_ops = { .owner = THIS_MODULE, .fb_check_var = drm_fb_helper_check_var, .fb_set_par = intel_fbdev_set_par, .fb_fillrect = cfb_fillrect, .fb_copyarea = cfb_copyarea, .fb_imageblit = cfb_imageblit, .fb_pan_display = drm_fb_helper_pan_display, .fb_blank = intel_fbdev_blank, .fb_setcmap = drm_fb_helper_setcmap, .fb_debug_enter = drm_fb_helper_debug_enter, .fb_debug_leave = drm_fb_helper_debug_leave, }; static int intelfb_alloc(struct drm_fb_helper *helper, struct drm_fb_helper_surface_size *sizes) { struct intel_fbdev *ifbdev = container_of(helper, struct intel_fbdev, helper); struct drm_framebuffer *fb; struct drm_device *dev = helper->dev; struct drm_mode_fb_cmd2 mode_cmd = {}; struct drm_i915_gem_object *obj; int size, ret; /* we don't do packed 24bpp */ if (sizes->surface_bpp == 24) sizes->surface_bpp = 32; mode_cmd.width = sizes->surface_width; mode_cmd.height = sizes->surface_height; mode_cmd.pitches[0] = ALIGN(mode_cmd.width * DIV_ROUND_UP(sizes->surface_bpp, 8), 64); mode_cmd.pixel_format = drm_mode_legacy_fb_format(sizes->surface_bpp, sizes->surface_depth); size = mode_cmd.pitches[0] * mode_cmd.height; size = PAGE_ALIGN(size); obj = i915_gem_object_create_stolen(dev, size); if (obj == NULL) obj = i915_gem_alloc_object(dev, size); if (!obj) { DRM_ERROR("failed to allocate framebuffer\n"); ret = -ENOMEM; goto out; } fb = __intel_framebuffer_create(dev, &mode_cmd, obj); if (IS_ERR(fb)) { ret = PTR_ERR(fb); goto out_unref; } /* Flush everything out, we'll be doing GTT only from now on */ ret = intel_pin_and_fence_fb_obj(NULL, fb, NULL); if (ret) { DRM_ERROR("failed to pin obj: %d\n", ret); goto out_fb; } ifbdev->fb = to_intel_framebuffer(fb); return 0; out_fb: drm_framebuffer_remove(fb); out_unref: drm_gem_object_unreference(&obj->base); out: return ret; } static int intelfb_create(struct drm_fb_helper *helper, struct drm_fb_helper_surface_size *sizes) { struct intel_fbdev *ifbdev = container_of(helper, struct intel_fbdev, helper); struct intel_framebuffer *intel_fb = ifbdev->fb; struct drm_device *dev = helper->dev; struct drm_i915_private *dev_priv = dev->dev_private; struct fb_info *info; struct drm_framebuffer *fb; struct drm_i915_gem_object *obj; int size, ret; bool prealloc = false; mutex_lock(&dev->struct_mutex); if (intel_fb && (sizes->fb_width > intel_fb->base.width || sizes->fb_height > intel_fb->base.height)) { DRM_DEBUG_KMS("BIOS fb too small (%dx%d), we require (%dx%d)," " releasing it\n", intel_fb->base.width, intel_fb->base.height, sizes->fb_width, sizes->fb_height); drm_framebuffer_unreference(&intel_fb->base); intel_fb = ifbdev->fb = NULL; } if (!intel_fb || WARN_ON(!intel_fb->obj)) { DRM_DEBUG_KMS("no BIOS fb, allocating a new one\n"); ret = intelfb_alloc(helper, sizes); if (ret) goto out_unlock; intel_fb = ifbdev->fb; } else { DRM_DEBUG_KMS("re-using BIOS fb\n"); prealloc = true; sizes->fb_width = intel_fb->base.width; sizes->fb_height = intel_fb->base.height; } obj = intel_fb->obj; size = obj->base.size; info = framebuffer_alloc(0, &dev->pdev->dev); if (!info) { ret = -ENOMEM; goto out_unpin; } info->par = helper; fb = &ifbdev->fb->base; ifbdev->helper.fb = fb; ifbdev->helper.fbdev = info; strcpy(info->fix.id, "inteldrmfb"); info->flags = FBINFO_DEFAULT | FBINFO_CAN_FORCE_OUTPUT; info->fbops = &intelfb_ops; ret = fb_alloc_cmap(&info->cmap, 256, 0); if (ret) { ret = -ENOMEM; goto out_unpin; } /* setup aperture base/size for vesafb takeover */ info->apertures = alloc_apertures(1); if (!info->apertures) { ret = -ENOMEM; goto out_unpin; } info->apertures->ranges[0].base = dev->mode_config.fb_base; info->apertures->ranges[0].size = dev_priv->gtt.mappable_end; info->fix.smem_start = dev->mode_config.fb_base + i915_gem_obj_ggtt_offset(obj); info->fix.smem_len = size; info->screen_base = ioremap_wc(dev_priv->gtt.mappable_base + i915_gem_obj_ggtt_offset(obj), size); if (!info->screen_base) { ret = -ENOSPC; goto out_unpin; } info->screen_size = size; /* This driver doesn't need a VT switch to restore the mode on resume */ info->skip_vt_switch = true; drm_fb_helper_fill_fix(info, fb->pitches[0], fb->depth); drm_fb_helper_fill_var(info, &ifbdev->helper, sizes->fb_width, sizes->fb_height); /* If the object is shmemfs backed, it will have given us zeroed pages. * If the object is stolen however, it will be full of whatever * garbage was left in there. */ if (ifbdev->fb->obj->stolen && !prealloc) memset_io(info->screen_base, 0, info->screen_size); /* Use default scratch pixmap (info->pixmap.flags = FB_PIXMAP_SYSTEM) */ DRM_DEBUG_KMS("allocated %dx%d fb: 0x%08lx, bo %p\n", fb->width, fb->height, i915_gem_obj_ggtt_offset(obj), obj); mutex_unlock(&dev->struct_mutex); vga_switcheroo_client_fb_set(dev->pdev, info); return 0; out_unpin: i915_gem_object_ggtt_unpin(obj); drm_gem_object_unreference(&obj->base); out_unlock: mutex_unlock(&dev->struct_mutex); return ret; } /** Sets the color ramps on behalf of RandR */ static void intel_crtc_fb_gamma_set(struct drm_crtc *crtc, u16 red, u16 green, u16 blue, int regno) { struct intel_crtc *intel_crtc = to_intel_crtc(crtc); intel_crtc->lut_r[regno] = red >> 8; intel_crtc->lut_g[regno] = green >> 8; intel_crtc->lut_b[regno] = blue >> 8; } static void intel_crtc_fb_gamma_get(struct drm_crtc *crtc, u16 *red, u16 *green, u16 *blue, int regno) { struct intel_crtc *intel_crtc = to_intel_crtc(crtc); *red = intel_crtc->lut_r[regno] << 8; *green = intel_crtc->lut_g[regno] << 8; *blue = intel_crtc->lut_b[regno] << 8; } static struct drm_fb_helper_crtc * intel_fb_helper_crtc(struct drm_fb_helper *fb_helper, struct drm_crtc *crtc) { int i; for (i = 0; i < fb_helper->crtc_count; i++) if (fb_helper->crtc_info[i].mode_set.crtc == crtc) return &fb_helper->crtc_info[i]; return NULL; } /* * Try to read the BIOS display configuration and use it for the initial * fb configuration. * * The BIOS or boot loader will generally create an initial display * configuration for us that includes some set of active pipes and displays. * This routine tries to figure out which pipes and connectors are active * and stuffs them into the crtcs and modes array given to us by the * drm_fb_helper code. * * The overall sequence is: * intel_fbdev_init - from driver load * intel_fbdev_init_bios - initialize the intel_fbdev using BIOS data * drm_fb_helper_init - build fb helper structs * drm_fb_helper_single_add_all_connectors - more fb helper structs * intel_fbdev_initial_config - apply the config * drm_fb_helper_initial_config - call ->probe then register_framebuffer() * drm_setup_crtcs - build crtc config for fbdev * intel_fb_initial_config - find active connectors etc * drm_fb_helper_single_fb_probe - set up fbdev * intelfb_create - re-use or alloc fb, build out fbdev structs * * Note that we don't make special consideration whether we could actually * switch to the selected modes without a full modeset. E.g. when the display * is in VGA mode we need to recalculate watermarks and set a new high-res * framebuffer anyway. */ static bool intel_fb_initial_config(struct drm_fb_helper *fb_helper, struct drm_fb_helper_crtc **crtcs, struct drm_display_mode **modes, struct drm_fb_offset *offsets, bool *enabled, int width, int height) { struct drm_device *dev = fb_helper->dev; int i, j; bool *save_enabled; bool fallback = true; int num_connectors_enabled = 0; int num_connectors_detected = 0; uint64_t conn_configured = 0, mask; int pass = 0; save_enabled = kcalloc(dev->mode_config.num_connector, sizeof(bool), GFP_KERNEL); if (!save_enabled) return false; memcpy(save_enabled, enabled, dev->mode_config.num_connector); mask = (1 << fb_helper->connector_count) - 1; retry: for (i = 0; i < fb_helper->connector_count; i++) { struct drm_fb_helper_connector *fb_conn; struct drm_connector *connector; struct drm_encoder *encoder; struct drm_fb_helper_crtc *new_crtc; fb_conn = fb_helper->connector_info[i]; connector = fb_conn->connector; if (conn_configured & (1 << i)) continue; if (pass == 0 && !connector->has_tile) continue; if (connector->status == connector_status_connected) num_connectors_detected++; if (!enabled[i]) { DRM_DEBUG_KMS("connector %s not enabled, skipping\n", connector->name); conn_configured |= (1 << i); continue; } if (connector->force == DRM_FORCE_OFF) { DRM_DEBUG_KMS("connector %s is disabled by user, skipping\n", connector->name); enabled[i] = false; continue; } encoder = connector->encoder; if (!encoder || WARN_ON(!encoder->crtc)) { if (connector->force > DRM_FORCE_OFF) goto bail; DRM_DEBUG_KMS("connector %s has no encoder or crtc, skipping\n", connector->name); enabled[i] = false; conn_configured |= (1 << i); continue; } num_connectors_enabled++; new_crtc = intel_fb_helper_crtc(fb_helper, encoder->crtc); /* * Make sure we're not trying to drive multiple connectors * with a single CRTC, since our cloning support may not * match the BIOS. */ for (j = 0; j < fb_helper->connector_count; j++) { if (crtcs[j] == new_crtc) { DRM_DEBUG_KMS("fallback: cloned configuration\n"); goto bail; } } DRM_DEBUG_KMS("looking for cmdline mode on connector %s\n", connector->name); /* go for command line mode first */ modes[i] = drm_pick_cmdline_mode(fb_conn, width, height); /* try for preferred next */ if (!modes[i]) { DRM_DEBUG_KMS("looking for preferred mode on connector %s %d\n", connector->name, connector->has_tile); modes[i] = drm_has_preferred_mode(fb_conn, width, height); } /* No preferred mode marked by the EDID? Are there any modes? */ if (!modes[i] && !list_empty(&connector->modes)) { DRM_DEBUG_KMS("using first mode listed on connector %s\n", connector->name); modes[i] = list_first_entry(&connector->modes, struct drm_display_mode, head); } /* last resort: use current mode */ if (!modes[i]) { /* * IMPORTANT: We want to use the adjusted mode (i.e. * after the panel fitter upscaling) as the initial * config, not the input mode, which is what crtc->mode * usually contains. But since our current fastboot * code puts a mode derived from the post-pfit timings * into crtc->mode this works out correctly. We don't * use hwmode anywhere right now, so use it for this * since the fb helper layer wants a pointer to * something we own. */ DRM_DEBUG_KMS("looking for current mode on connector %s\n", connector->name); intel_mode_from_pipe_config(&encoder->crtc->hwmode, to_intel_crtc(encoder->crtc)->config); modes[i] = &encoder->crtc->hwmode; } crtcs[i] = new_crtc; DRM_DEBUG_KMS("connector %s on pipe %c [CRTC:%d]: %dx%d%s\n", connector->name, pipe_name(to_intel_crtc(encoder->crtc)->pipe), encoder->crtc->base.id, modes[i]->hdisplay, modes[i]->vdisplay, modes[i]->flags & DRM_MODE_FLAG_INTERLACE ? "i" :""); fallback = false; conn_configured |= (1 << i); } if ((conn_configured & mask) != mask) { pass++; goto retry; } /* * If the BIOS didn't enable everything it could, fall back to have the * same user experiencing of lighting up as much as possible like the * fbdev helper library. */ if (num_connectors_enabled != num_connectors_detected && num_connectors_enabled < INTEL_INFO(dev)->num_pipes) { DRM_DEBUG_KMS("fallback: Not all outputs enabled\n"); DRM_DEBUG_KMS("Enabled: %i, detected: %i\n", num_connectors_enabled, num_connectors_detected); fallback = true; } if (fallback) { bail: DRM_DEBUG_KMS("Not using firmware configuration\n"); memcpy(enabled, save_enabled, dev->mode_config.num_connector); kfree(save_enabled); return false; } kfree(save_enabled); return true; } static const struct drm_fb_helper_funcs intel_fb_helper_funcs = { .initial_config = intel_fb_initial_config, .gamma_set = intel_crtc_fb_gamma_set, .gamma_get = intel_crtc_fb_gamma_get, .fb_probe = intelfb_create, }; static void intel_fbdev_destroy(struct drm_device *dev, struct intel_fbdev *ifbdev) { if (ifbdev->helper.fbdev) { struct fb_info *info = ifbdev->helper.fbdev; unregister_framebuffer(info); iounmap(info->screen_base); if (info->cmap.len) fb_dealloc_cmap(&info->cmap); framebuffer_release(info); } drm_fb_helper_fini(&ifbdev->helper); drm_framebuffer_unregister_private(&ifbdev->fb->base); drm_framebuffer_remove(&ifbdev->fb->base); } /* * Build an intel_fbdev struct using a BIOS allocated framebuffer, if possible. * The core display code will have read out the current plane configuration, * so we use that to figure out if there's an object for us to use as the * fb, and if so, we re-use it for the fbdev configuration. * * Note we only support a single fb shared across pipes for boot (mostly for * fbcon), so we just find the biggest and use that. */ static bool intel_fbdev_init_bios(struct drm_device *dev, struct intel_fbdev *ifbdev) { struct intel_framebuffer *fb = NULL; struct drm_crtc *crtc; struct intel_crtc *intel_crtc; struct intel_initial_plane_config *plane_config = NULL; unsigned int max_size = 0; if (!i915.fastboot) return false; /* Find the largest fb */ for_each_crtc(dev, crtc) { intel_crtc = to_intel_crtc(crtc); if (!intel_crtc->active || !crtc->primary->fb) { DRM_DEBUG_KMS("pipe %c not active or no fb, skipping\n", pipe_name(intel_crtc->pipe)); continue; } if (intel_crtc->plane_config.size > max_size) { DRM_DEBUG_KMS("found possible fb from plane %c\n", pipe_name(intel_crtc->pipe)); plane_config = &intel_crtc->plane_config; fb = to_intel_framebuffer(crtc->primary->fb); max_size = plane_config->size; } } if (!fb) { DRM_DEBUG_KMS("no active fbs found, not using BIOS config\n"); goto out; } /* Now make sure all the pipes will fit into it */ for_each_crtc(dev, crtc) { unsigned int cur_size; intel_crtc = to_intel_crtc(crtc); if (!intel_crtc->active) { DRM_DEBUG_KMS("pipe %c not active, skipping\n", pipe_name(intel_crtc->pipe)); continue; } DRM_DEBUG_KMS("checking plane %c for BIOS fb\n", pipe_name(intel_crtc->pipe)); /* * See if the plane fb we found above will fit on this * pipe. Note we need to use the selected fb's pitch and bpp * rather than the current pipe's, since they differ. */ cur_size = intel_crtc->config->base.adjusted_mode.crtc_hdisplay; cur_size = cur_size * fb->base.bits_per_pixel / 8; if (fb->base.pitches[0] < cur_size) { DRM_DEBUG_KMS("fb not wide enough for plane %c (%d vs %d)\n", pipe_name(intel_crtc->pipe), cur_size, fb->base.pitches[0]); plane_config = NULL; fb = NULL; break; } cur_size = intel_crtc->config->base.adjusted_mode.crtc_vdisplay; cur_size = intel_fb_align_height(dev, cur_size, fb->base.pixel_format, fb->base.modifier[0]); cur_size *= fb->base.pitches[0]; DRM_DEBUG_KMS("pipe %c area: %dx%d, bpp: %d, size: %d\n", pipe_name(intel_crtc->pipe), intel_crtc->config->base.adjusted_mode.crtc_hdisplay, intel_crtc->config->base.adjusted_mode.crtc_vdisplay, fb->base.bits_per_pixel, cur_size); if (cur_size > max_size) { DRM_DEBUG_KMS("fb not big enough for plane %c (%d vs %d)\n", pipe_name(intel_crtc->pipe), cur_size, max_size); plane_config = NULL; fb = NULL; break; } DRM_DEBUG_KMS("fb big enough for plane %c (%d >= %d)\n", pipe_name(intel_crtc->pipe), max_size, cur_size); } if (!fb) { DRM_DEBUG_KMS("BIOS fb not suitable for all pipes, not using\n"); goto out; } ifbdev->preferred_bpp = fb->base.bits_per_pixel; ifbdev->fb = fb; drm_framebuffer_reference(&ifbdev->fb->base); /* Final pass to check if any active pipes don't have fbs */ for_each_crtc(dev, crtc) { intel_crtc = to_intel_crtc(crtc); if (!intel_crtc->active) continue; WARN(!crtc->primary->fb, "re-used BIOS config but lost an fb on crtc %d\n", crtc->base.id); } DRM_DEBUG_KMS("using BIOS fb for initial console\n"); return true; out: return false; } static void intel_fbdev_suspend_worker(struct work_struct *work) { intel_fbdev_set_suspend(container_of(work, struct drm_i915_private, fbdev_suspend_work)->dev, FBINFO_STATE_RUNNING, true); } int intel_fbdev_init(struct drm_device *dev) { struct intel_fbdev *ifbdev; struct drm_i915_private *dev_priv = dev->dev_private; int ret; if (WARN_ON(INTEL_INFO(dev)->num_pipes == 0)) return -ENODEV; ifbdev = kzalloc(sizeof(struct intel_fbdev), GFP_KERNEL); if (ifbdev == NULL) return -ENOMEM; drm_fb_helper_prepare(dev, &ifbdev->helper, &intel_fb_helper_funcs); if (!intel_fbdev_init_bios(dev, ifbdev)) ifbdev->preferred_bpp = 32; ret = drm_fb_helper_init(dev, &ifbdev->helper, INTEL_INFO(dev)->num_pipes, 4); if (ret) { kfree(ifbdev); return ret; } dev_priv->fbdev = ifbdev; INIT_WORK(&dev_priv->fbdev_suspend_work, intel_fbdev_suspend_worker); drm_fb_helper_single_add_all_connectors(&ifbdev->helper); return 0; } void intel_fbdev_initial_config(void *data, async_cookie_t cookie) { struct drm_i915_private *dev_priv = data; struct intel_fbdev *ifbdev = dev_priv->fbdev; /* Due to peculiar init order wrt to hpd handling this is separate. */ drm_fb_helper_initial_config(&ifbdev->helper, ifbdev->preferred_bpp); } void intel_fbdev_fini(struct drm_device *dev) { struct drm_i915_private *dev_priv = dev->dev_private; if (!dev_priv->fbdev) return; flush_work(&dev_priv->fbdev_suspend_work); async_synchronize_full(); intel_fbdev_destroy(dev, dev_priv->fbdev); kfree(dev_priv->fbdev); dev_priv->fbdev = NULL; } void intel_fbdev_set_suspend(struct drm_device *dev, int state, bool synchronous) { struct drm_i915_private *dev_priv = dev->dev_private; struct intel_fbdev *ifbdev = dev_priv->fbdev; struct fb_info *info; if (!ifbdev) return; info = ifbdev->helper.fbdev; if (synchronous) { /* Flush any pending work to turn the console on, and then * wait to turn it off. It must be synchronous as we are * about to suspend or unload the driver. * * Note that from within the work-handler, we cannot flush * ourselves, so only flush outstanding work upon suspend! */ if (state != FBINFO_STATE_RUNNING) flush_work(&dev_priv->fbdev_suspend_work); console_lock(); } else { /* * The console lock can be pretty contented on resume due * to all the printk activity. Try to keep it out of the hot * path of resume if possible. */ WARN_ON(state != FBINFO_STATE_RUNNING); if (!console_trylock()) { /* Don't block our own workqueue as this can * be run in parallel with other i915.ko tasks. */ schedule_work(&dev_priv->fbdev_suspend_work); return; } } /* On resume from hibernation: If the object is shmemfs backed, it has * been restored from swap. If the object is stolen however, it will be * full of whatever garbage was left in there. */ if (state == FBINFO_STATE_RUNNING && ifbdev->fb->obj->stolen) memset_io(info->screen_base, 0, info->screen_size); fb_set_suspend(info, state); console_unlock(); } void intel_fbdev_output_poll_changed(struct drm_device *dev) { struct drm_i915_private *dev_priv = dev->dev_private; if (dev_priv->fbdev) drm_fb_helper_hotplug_event(&dev_priv->fbdev->helper); } void intel_fbdev_restore_mode(struct drm_device *dev) { int ret; struct drm_i915_private *dev_priv = dev->dev_private; if (!dev_priv->fbdev) return; ret = drm_fb_helper_restore_fbdev_mode_unlocked(&dev_priv->fbdev->helper); if (ret) DRM_DEBUG("failed to restore crtc mode\n"); }