/* * 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 "gem/i915_gem_lmem.h" #include "i915_drv.h" #include "intel_display_types.h" #include "intel_fb.h" #include "intel_fb_pin.h" #include "intel_fbdev.h" #include "intel_frontbuffer.h" struct intel_fbdev { struct drm_fb_helper helper; struct intel_framebuffer *fb; struct i915_vma *vma; unsigned long vma_flags; async_cookie_t cookie; int preferred_bpp; /* Whether or not fbdev hpd processing is temporarily suspended */ bool hpd_suspended: 1; /* Set when a hotplug was received while HPD processing was suspended */ bool hpd_waiting: 1; /* Protects hpd_suspended */ struct mutex hpd_lock; }; static struct intel_frontbuffer *to_frontbuffer(struct intel_fbdev *ifbdev) { return ifbdev->fb->frontbuffer; } static void intel_fbdev_invalidate(struct intel_fbdev *ifbdev) { intel_frontbuffer_invalidate(to_frontbuffer(ifbdev), ORIGIN_CPU); } 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) intel_fbdev_invalidate(ifbdev); 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) intel_fbdev_invalidate(ifbdev); return ret; } static int intel_fbdev_pan_display(struct fb_var_screeninfo *var, 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_pan_display(var, info); if (ret == 0) intel_fbdev_invalidate(ifbdev); return ret; } static const struct fb_ops intelfb_ops = { .owner = THIS_MODULE, DRM_FB_HELPER_DEFAULT_OPS, .fb_set_par = intel_fbdev_set_par, .fb_read = drm_fb_helper_cfb_read, .fb_write = drm_fb_helper_cfb_write, .fb_fillrect = drm_fb_helper_cfb_fillrect, .fb_copyarea = drm_fb_helper_cfb_copyarea, .fb_imageblit = drm_fb_helper_cfb_imageblit, .fb_pan_display = intel_fbdev_pan_display, .fb_blank = intel_fbdev_blank, }; 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_i915_private *dev_priv = to_i915(dev); struct drm_mode_fb_cmd2 mode_cmd = {}; struct drm_i915_gem_object *obj; int size; /* 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 = ERR_PTR(-ENODEV); if (HAS_LMEM(dev_priv)) { obj = i915_gem_object_create_lmem(dev_priv, size, I915_BO_ALLOC_CONTIGUOUS); } else { /* * If the FB is too big, just don't use it since fbdev is not very * important and we should probably use that space with FBC or other * features. */ if (size * 2 < dev_priv->stolen_usable_size) obj = i915_gem_object_create_stolen(dev_priv, size); if (IS_ERR(obj)) obj = i915_gem_object_create_shmem(dev_priv, size); } if (IS_ERR(obj)) { drm_err(&dev_priv->drm, "failed to allocate framebuffer (%pe)\n", obj); return PTR_ERR(obj); } fb = intel_framebuffer_create(obj, &mode_cmd); i915_gem_object_put(obj); if (IS_ERR(fb)) return PTR_ERR(fb); ifbdev->fb = to_intel_framebuffer(fb); return 0; } 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 = to_i915(dev); struct pci_dev *pdev = to_pci_dev(dev_priv->drm.dev); struct i915_ggtt *ggtt = to_gt(dev_priv)->ggtt; const struct i915_gtt_view view = { .type = I915_GTT_VIEW_NORMAL, }; intel_wakeref_t wakeref; struct fb_info *info; struct i915_vma *vma; unsigned long flags = 0; bool prealloc = false; void __iomem *vaddr; struct drm_i915_gem_object *obj; int ret; mutex_lock(&ifbdev->hpd_lock); ret = ifbdev->hpd_suspended ? -EAGAIN : 0; mutex_unlock(&ifbdev->hpd_lock); if (ret) return ret; if (intel_fb && (sizes->fb_width > intel_fb->base.width || sizes->fb_height > intel_fb->base.height)) { drm_dbg_kms(&dev_priv->drm, "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_put(&intel_fb->base); intel_fb = ifbdev->fb = NULL; } if (!intel_fb || drm_WARN_ON(dev, !intel_fb_obj(&intel_fb->base))) { drm_dbg_kms(&dev_priv->drm, "no BIOS fb, allocating a new one\n"); ret = intelfb_alloc(helper, sizes); if (ret) return ret; intel_fb = ifbdev->fb; } else { drm_dbg_kms(&dev_priv->drm, "re-using BIOS fb\n"); prealloc = true; sizes->fb_width = intel_fb->base.width; sizes->fb_height = intel_fb->base.height; } wakeref = intel_runtime_pm_get(&dev_priv->runtime_pm); /* Pin the GGTT vma for our access via info->screen_base. * This also validates that any existing fb inherited from the * BIOS is suitable for own access. */ vma = intel_pin_and_fence_fb_obj(&ifbdev->fb->base, false, &view, false, &flags); if (IS_ERR(vma)) { ret = PTR_ERR(vma); goto out_unlock; } info = drm_fb_helper_alloc_info(helper); if (IS_ERR(info)) { drm_err(&dev_priv->drm, "Failed to allocate fb_info (%pe)\n", info); ret = PTR_ERR(info); goto out_unpin; } ifbdev->helper.fb = &ifbdev->fb->base; info->fbops = &intelfb_ops; /* setup aperture base/size for vesafb takeover */ obj = intel_fb_obj(&intel_fb->base); if (i915_gem_object_is_lmem(obj)) { struct intel_memory_region *mem = obj->mm.region; info->apertures->ranges[0].base = mem->io_start; info->apertures->ranges[0].size = mem->io_size; /* Use fbdev's framebuffer from lmem for discrete */ info->fix.smem_start = (unsigned long)(mem->io_start + i915_gem_object_get_dma_address(obj, 0)); info->fix.smem_len = obj->base.size; } else { info->apertures->ranges[0].base = ggtt->gmadr.start; info->apertures->ranges[0].size = ggtt->mappable_end; /* Our framebuffer is the entirety of fbdev's system memory */ info->fix.smem_start = (unsigned long)(ggtt->gmadr.start + vma->node.start); info->fix.smem_len = vma->size; } vaddr = i915_vma_pin_iomap(vma); if (IS_ERR(vaddr)) { drm_err(&dev_priv->drm, "Failed to remap framebuffer into virtual memory (%pe)\n", vaddr); ret = PTR_ERR(vaddr); goto out_unpin; } info->screen_base = vaddr; info->screen_size = vma->size; drm_fb_helper_fill_info(info, &ifbdev->helper, sizes); /* 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 (!i915_gem_object_is_shmem(vma->obj) && !prealloc) memset_io(info->screen_base, 0, info->screen_size); /* Use default scratch pixmap (info->pixmap.flags = FB_PIXMAP_SYSTEM) */ drm_dbg_kms(&dev_priv->drm, "allocated %dx%d fb: 0x%08x\n", ifbdev->fb->base.width, ifbdev->fb->base.height, i915_ggtt_offset(vma)); ifbdev->vma = vma; ifbdev->vma_flags = flags; intel_runtime_pm_put(&dev_priv->runtime_pm, wakeref); vga_switcheroo_client_fb_set(pdev, info); return 0; out_unpin: intel_unpin_fb_vma(vma, flags); out_unlock: intel_runtime_pm_put(&dev_priv->runtime_pm, wakeref); return ret; } static const struct drm_fb_helper_funcs intel_fb_helper_funcs = { .fb_probe = intelfb_create, }; static void intel_fbdev_destroy(struct intel_fbdev *ifbdev) { /* We rely on the object-free to release the VMA pinning for * the info->screen_base mmaping. Leaking the VMA is simpler than * trying to rectify all the possible error paths leading here. */ drm_fb_helper_fini(&ifbdev->helper); if (ifbdev->vma) intel_unpin_fb_vma(ifbdev->vma, ifbdev->vma_flags); if (ifbdev->fb) drm_framebuffer_remove(&ifbdev->fb->base); kfree(ifbdev); } /* * 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 drm_i915_private *i915 = to_i915(dev); struct intel_framebuffer *fb = NULL; struct intel_crtc *crtc; unsigned int max_size = 0; /* Find the largest fb */ for_each_intel_crtc(dev, crtc) { struct intel_crtc_state *crtc_state = to_intel_crtc_state(crtc->base.state); struct intel_plane *plane = to_intel_plane(crtc->base.primary); struct intel_plane_state *plane_state = to_intel_plane_state(plane->base.state); struct drm_i915_gem_object *obj = intel_fb_obj(plane_state->uapi.fb); if (!crtc_state->uapi.active) { drm_dbg_kms(&i915->drm, "[CRTC:%d:%s] not active, skipping\n", crtc->base.base.id, crtc->base.name); continue; } if (!obj) { drm_dbg_kms(&i915->drm, "[PLANE:%d:%s] no fb, skipping\n", plane->base.base.id, plane->base.name); continue; } if (obj->base.size > max_size) { drm_dbg_kms(&i915->drm, "found possible fb from [PLANE:%d:%s]\n", plane->base.base.id, plane->base.name); fb = to_intel_framebuffer(plane_state->uapi.fb); max_size = obj->base.size; } } if (!fb) { drm_dbg_kms(&i915->drm, "no active fbs found, not using BIOS config\n"); goto out; } /* Now make sure all the pipes will fit into it */ for_each_intel_crtc(dev, crtc) { struct intel_crtc_state *crtc_state = to_intel_crtc_state(crtc->base.state); struct intel_plane *plane = to_intel_plane(crtc->base.primary); unsigned int cur_size; if (!crtc_state->uapi.active) { drm_dbg_kms(&i915->drm, "[CRTC:%d:%s] not active, skipping\n", crtc->base.base.id, crtc->base.name); continue; } drm_dbg_kms(&i915->drm, "checking [PLANE:%d:%s] for BIOS fb\n", plane->base.base.id, plane->base.name); /* * 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 = crtc_state->uapi.adjusted_mode.crtc_hdisplay; cur_size = cur_size * fb->base.format->cpp[0]; if (fb->base.pitches[0] < cur_size) { drm_dbg_kms(&i915->drm, "fb not wide enough for [PLANE:%d:%s] (%d vs %d)\n", plane->base.base.id, plane->base.name, cur_size, fb->base.pitches[0]); fb = NULL; break; } cur_size = crtc_state->uapi.adjusted_mode.crtc_vdisplay; cur_size = intel_fb_align_height(&fb->base, 0, cur_size); cur_size *= fb->base.pitches[0]; drm_dbg_kms(&i915->drm, "[CRTC:%d:%s] area: %dx%d, bpp: %d, size: %d\n", crtc->base.base.id, crtc->base.name, crtc_state->uapi.adjusted_mode.crtc_hdisplay, crtc_state->uapi.adjusted_mode.crtc_vdisplay, fb->base.format->cpp[0] * 8, cur_size); if (cur_size > max_size) { drm_dbg_kms(&i915->drm, "fb not big enough for [PLANE:%d:%s] (%d vs %d)\n", plane->base.base.id, plane->base.name, cur_size, max_size); fb = NULL; break; } drm_dbg_kms(&i915->drm, "fb big enough [PLANE:%d:%s] (%d >= %d)\n", plane->base.base.id, plane->base.name, max_size, cur_size); } if (!fb) { drm_dbg_kms(&i915->drm, "BIOS fb not suitable for all pipes, not using\n"); goto out; } ifbdev->preferred_bpp = fb->base.format->cpp[0] * 8; ifbdev->fb = fb; drm_framebuffer_get(&ifbdev->fb->base); /* Final pass to check if any active pipes don't have fbs */ for_each_intel_crtc(dev, crtc) { struct intel_crtc_state *crtc_state = to_intel_crtc_state(crtc->base.state); struct intel_plane *plane = to_intel_plane(crtc->base.primary); struct intel_plane_state *plane_state = to_intel_plane_state(plane->base.state); if (!crtc_state->uapi.active) continue; drm_WARN(dev, !plane_state->uapi.fb, "re-used BIOS config but lost an fb on [PLANE:%d:%s]\n", plane->base.base.id, plane->base.name); } drm_dbg_kms(&i915->drm, "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, display.fbdev.suspend_work)->drm, FBINFO_STATE_RUNNING, true); } int intel_fbdev_init(struct drm_device *dev) { struct drm_i915_private *dev_priv = to_i915(dev); struct intel_fbdev *ifbdev; int ret; if (drm_WARN_ON(dev, !HAS_DISPLAY(dev_priv))) return -ENODEV; ifbdev = kzalloc(sizeof(struct intel_fbdev), GFP_KERNEL); if (ifbdev == NULL) return -ENOMEM; mutex_init(&ifbdev->hpd_lock); 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); if (ret) { kfree(ifbdev); return ret; } dev_priv->display.fbdev.fbdev = ifbdev; INIT_WORK(&dev_priv->display.fbdev.suspend_work, intel_fbdev_suspend_worker); return 0; } static void intel_fbdev_initial_config(void *data, async_cookie_t cookie) { struct intel_fbdev *ifbdev = data; /* Due to peculiar init order wrt to hpd handling this is separate. */ if (drm_fb_helper_initial_config(&ifbdev->helper, ifbdev->preferred_bpp)) intel_fbdev_unregister(to_i915(ifbdev->helper.dev)); } void intel_fbdev_initial_config_async(struct drm_device *dev) { struct intel_fbdev *ifbdev = to_i915(dev)->display.fbdev.fbdev; if (!ifbdev) return; ifbdev->cookie = async_schedule(intel_fbdev_initial_config, ifbdev); } static void intel_fbdev_sync(struct intel_fbdev *ifbdev) { if (!ifbdev->cookie) return; /* Only serialises with all preceding async calls, hence +1 */ async_synchronize_cookie(ifbdev->cookie + 1); ifbdev->cookie = 0; } void intel_fbdev_unregister(struct drm_i915_private *dev_priv) { struct intel_fbdev *ifbdev = dev_priv->display.fbdev.fbdev; if (!ifbdev) return; intel_fbdev_set_suspend(&dev_priv->drm, FBINFO_STATE_SUSPENDED, true); if (!current_is_async()) intel_fbdev_sync(ifbdev); drm_fb_helper_unregister_info(&ifbdev->helper); } void intel_fbdev_fini(struct drm_i915_private *dev_priv) { struct intel_fbdev *ifbdev = fetch_and_zero(&dev_priv->display.fbdev.fbdev); if (!ifbdev) return; intel_fbdev_destroy(ifbdev); } /* Suspends/resumes fbdev processing of incoming HPD events. When resuming HPD * processing, fbdev will perform a full connector reprobe if a hotplug event * was received while HPD was suspended. */ static void intel_fbdev_hpd_set_suspend(struct drm_i915_private *i915, int state) { struct intel_fbdev *ifbdev = i915->display.fbdev.fbdev; bool send_hpd = false; mutex_lock(&ifbdev->hpd_lock); ifbdev->hpd_suspended = state == FBINFO_STATE_SUSPENDED; send_hpd = !ifbdev->hpd_suspended && ifbdev->hpd_waiting; ifbdev->hpd_waiting = false; mutex_unlock(&ifbdev->hpd_lock); if (send_hpd) { drm_dbg_kms(&i915->drm, "Handling delayed fbcon HPD event\n"); drm_fb_helper_hotplug_event(&ifbdev->helper); } } void intel_fbdev_set_suspend(struct drm_device *dev, int state, bool synchronous) { struct drm_i915_private *dev_priv = to_i915(dev); struct intel_fbdev *ifbdev = dev_priv->display.fbdev.fbdev; struct fb_info *info; if (!ifbdev || !ifbdev->vma) goto set_suspend; info = ifbdev->helper.info; 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->display.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. */ drm_WARN_ON(dev, 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->display.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 && !i915_gem_object_is_shmem(intel_fb_obj(&ifbdev->fb->base))) memset_io(info->screen_base, 0, info->screen_size); drm_fb_helper_set_suspend(&ifbdev->helper, state); console_unlock(); set_suspend: intel_fbdev_hpd_set_suspend(dev_priv, state); } void intel_fbdev_output_poll_changed(struct drm_device *dev) { struct intel_fbdev *ifbdev = to_i915(dev)->display.fbdev.fbdev; bool send_hpd; if (!ifbdev) return; intel_fbdev_sync(ifbdev); mutex_lock(&ifbdev->hpd_lock); send_hpd = !ifbdev->hpd_suspended; ifbdev->hpd_waiting = true; mutex_unlock(&ifbdev->hpd_lock); if (send_hpd && (ifbdev->vma || ifbdev->helper.deferred_setup)) drm_fb_helper_hotplug_event(&ifbdev->helper); } void intel_fbdev_restore_mode(struct drm_device *dev) { struct intel_fbdev *ifbdev = to_i915(dev)->display.fbdev.fbdev; if (!ifbdev) return; intel_fbdev_sync(ifbdev); if (!ifbdev->vma) return; if (drm_fb_helper_restore_fbdev_mode_unlocked(&ifbdev->helper) == 0) intel_fbdev_invalidate(ifbdev); } struct intel_framebuffer *intel_fbdev_framebuffer(struct intel_fbdev *fbdev) { if (!fbdev || !fbdev->helper.fb) return NULL; return to_intel_framebuffer(fbdev->helper.fb); }