diff options
Diffstat (limited to 'drivers/gpu/drm/i915/display/intel_fbdev.c')
| -rw-r--r-- | drivers/gpu/drm/i915/display/intel_fbdev.c | 639 |
1 files changed, 639 insertions, 0 deletions
diff --git a/drivers/gpu/drm/i915/display/intel_fbdev.c b/drivers/gpu/drm/i915/display/intel_fbdev.c new file mode 100644 index 000000000..842c04e63 --- /dev/null +++ b/drivers/gpu/drm/i915/display/intel_fbdev.c @@ -0,0 +1,639 @@ +/* + * 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 <linux/async.h> +#include <linux/console.h> +#include <linux/delay.h> +#include <linux/errno.h> +#include <linux/init.h> +#include <linux/kernel.h> +#include <linux/mm.h> +#include <linux/module.h> +#include <linux/string.h> +#include <linux/sysrq.h> +#include <linux/tty.h> +#include <linux/vga_switcheroo.h> + +#include <drm/drm_crtc.h> +#include <drm/drm_fb_helper.h> +#include <drm/drm_fourcc.h> + +#include "i915_drv.h" +#include "intel_display_types.h" +#include "intel_fbdev.h" +#include "intel_frontbuffer.h" + +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_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); + + /* 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. */ + obj = ERR_PTR(-ENODEV); + 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\n"); + 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 = dev_priv->drm.pdev; + struct i915_ggtt *ggtt = &dev_priv->ggtt; + const struct i915_ggtt_view view = { + .type = I915_GGTT_VIEW_NORMAL, + }; + intel_wakeref_t wakeref; + struct fb_info *info; + struct i915_vma *vma; + unsigned long flags = 0; + bool prealloc = false; + void __iomem *vaddr; + int 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, + &view, false, &flags); + if (IS_ERR(vma)) { + ret = PTR_ERR(vma); + goto out_unlock; + } + + intel_frontbuffer_flush(to_frontbuffer(ifbdev), ORIGIN_DIRTYFB); + + info = drm_fb_helper_alloc_fbi(helper); + if (IS_ERR(info)) { + drm_err(&dev_priv->drm, "Failed to allocate fb_info\n"); + ret = PTR_ERR(info); + goto out_unpin; + } + + ifbdev->helper.fb = &ifbdev->fb->base; + + info->fbops = &intelfb_ops; + + /* setup aperture base/size for vesafb takeover */ + 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->node.size; + + vaddr = i915_vma_pin_iomap(vma); + if (IS_ERR(vaddr)) { + drm_err(&dev_priv->drm, + "Failed to remap framebuffer into virtual memory\n"); + ret = PTR_ERR(vaddr); + goto out_unpin; + } + info->screen_base = vaddr; + info->screen_size = vma->node.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 (vma->obj->stolen && !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 drm_crtc *crtc; + struct intel_crtc *intel_crtc; + unsigned int max_size = 0; + + /* Find the largest fb */ + for_each_crtc(dev, crtc) { + struct drm_i915_gem_object *obj = + intel_fb_obj(crtc->primary->state->fb); + intel_crtc = to_intel_crtc(crtc); + + if (!crtc->state->active || !obj) { + drm_dbg_kms(&i915->drm, + "pipe %c not active or no fb, skipping\n", + pipe_name(intel_crtc->pipe)); + continue; + } + + if (obj->base.size > max_size) { + drm_dbg_kms(&i915->drm, + "found possible fb from plane %c\n", + pipe_name(intel_crtc->pipe)); + fb = to_intel_framebuffer(crtc->primary->state->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_crtc(dev, crtc) { + unsigned int cur_size; + + intel_crtc = to_intel_crtc(crtc); + + if (!crtc->state->active) { + drm_dbg_kms(&i915->drm, + "pipe %c not active, skipping\n", + pipe_name(intel_crtc->pipe)); + continue; + } + + drm_dbg_kms(&i915->drm, "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 = crtc->state->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 %c (%d vs %d)\n", + pipe_name(intel_crtc->pipe), + cur_size, fb->base.pitches[0]); + fb = NULL; + break; + } + + cur_size = crtc->state->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, + "pipe %c area: %dx%d, bpp: %d, size: %d\n", + pipe_name(intel_crtc->pipe), + crtc->state->adjusted_mode.crtc_hdisplay, + crtc->state->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 %c (%d vs %d)\n", + pipe_name(intel_crtc->pipe), + cur_size, max_size); + fb = NULL; + break; + } + + drm_dbg_kms(&i915->drm, + "fb big enough for plane %c (%d >= %d)\n", + pipe_name(intel_crtc->pipe), + 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_crtc(dev, crtc) { + intel_crtc = to_intel_crtc(crtc); + + if (!crtc->state->active) + continue; + + drm_WARN(dev, !crtc->primary->state->fb, + "re-used BIOS config but lost an fb on crtc %d\n", + crtc->base.id); + } + + + 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, + 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->fbdev = ifbdev; + INIT_WORK(&dev_priv->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)->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->fbdev; + + if (!ifbdev) + return; + + cancel_work_sync(&dev_priv->fbdev_suspend_work); + if (!current_is_async()) + intel_fbdev_sync(ifbdev); + + drm_fb_helper_unregister_fbi(&ifbdev->helper); +} + +void intel_fbdev_fini(struct drm_i915_private *dev_priv) +{ + struct intel_fbdev *ifbdev = fetch_and_zero(&dev_priv->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->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->fbdev; + struct fb_info *info; + + if (!ifbdev || !ifbdev->vma) + 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. + */ + 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->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 && + intel_fb_obj(&ifbdev->fb->base)->stolen) + memset_io(info->screen_base, 0, info->screen_size); + + drm_fb_helper_set_suspend(&ifbdev->helper, state); + console_unlock(); + + 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)->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)->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); +} |