summaryrefslogtreecommitdiffstats
path: root/drivers/gpu/drm/i915/display/intel_fbdev.c
diff options
context:
space:
mode:
Diffstat (limited to 'drivers/gpu/drm/i915/display/intel_fbdev.c')
-rw-r--r--drivers/gpu/drm/i915/display/intel_fbdev.c640
1 files changed, 640 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 000000000000..1edd44ee32b2
--- /dev/null
+++ b/drivers/gpu/drm/i915/display/intel_fbdev.c
@@ -0,0 +1,640 @@
+/*
+ * 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 <drm/i915_drm.h>
+
+#include "i915_drv.h"
+#include "intel_drv.h"
+#include "intel_fbdev.h"
+#include "intel_frontbuffer.h"
+
+static void intel_fbdev_invalidate(struct intel_fbdev *ifbdev)
+{
+ struct drm_i915_gem_object *obj = intel_fb_obj(&ifbdev->fb->base);
+ unsigned int origin =
+ ifbdev->vma_flags & PLANE_HAS_FENCE ? ORIGIN_GTT : ORIGIN_CPU;
+
+ intel_fb_obj_invalidate(obj, origin);
+}
+
+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 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, 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);
+
+ /* 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 = NULL;
+ if (size * 2 < dev_priv->stolen_usable_size)
+ obj = i915_gem_object_create_stolen(dev_priv, size);
+ if (obj == NULL)
+ obj = i915_gem_object_create_shmem(dev_priv, size);
+ if (IS_ERR(obj)) {
+ DRM_ERROR("failed to allocate framebuffer\n");
+ ret = PTR_ERR(obj);
+ goto err;
+ }
+
+ fb = intel_framebuffer_create(obj, &mode_cmd);
+ if (IS_ERR(fb)) {
+ ret = PTR_ERR(fb);
+ goto err_obj;
+ }
+
+ ifbdev->fb = to_intel_framebuffer(fb);
+
+ return 0;
+
+err_obj:
+ i915_gem_object_put(obj);
+err:
+ 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 = 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,
+ };
+ struct drm_framebuffer *fb;
+ 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_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_put(&intel_fb->base);
+ intel_fb = ifbdev->fb = NULL;
+ }
+ if (!intel_fb || WARN_ON(!intel_fb_obj(&intel_fb->base))) {
+ DRM_DEBUG_KMS("no BIOS fb, allocating a new one\n");
+ ret = intelfb_alloc(helper, sizes);
+ if (ret)
+ return ret;
+ 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;
+ }
+
+ mutex_lock(&dev->struct_mutex);
+ 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;
+ }
+
+ fb = &ifbdev->fb->base;
+ intel_fb_obj_flush(intel_fb_obj(fb), ORIGIN_DIRTYFB);
+
+ info = drm_fb_helper_alloc_fbi(helper);
+ if (IS_ERR(info)) {
+ DRM_ERROR("Failed to allocate fb_info\n");
+ ret = PTR_ERR(info);
+ goto out_unpin;
+ }
+
+ ifbdev->helper.fb = fb;
+
+ info->fbops = &intelfb_ops;
+
+ /* setup aperture base/size for vesafb takeover */
+ info->apertures->ranges[0].base = dev->mode_config.fb_base;
+ info->apertures->ranges[0].size = ggtt->mappable_end;
+
+ info->fix.smem_start = dev->mode_config.fb_base + i915_ggtt_offset(vma);
+ info->fix.smem_len = vma->node.size;
+
+ vaddr = i915_vma_pin_iomap(vma);
+ if (IS_ERR(vaddr)) {
+ DRM_ERROR("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 (intel_fb_obj(fb)->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%08x\n",
+ fb->width, fb->height, i915_ggtt_offset(vma));
+ ifbdev->vma = vma;
+ ifbdev->vma_flags = flags;
+
+ intel_runtime_pm_put(&dev_priv->runtime_pm, wakeref);
+ mutex_unlock(&dev->struct_mutex);
+ 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);
+ mutex_unlock(&dev->struct_mutex);
+ 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) {
+ mutex_lock(&ifbdev->helper.dev->struct_mutex);
+ intel_unpin_fb_vma(ifbdev->vma, ifbdev->vma_flags);
+ mutex_unlock(&ifbdev->helper.dev->struct_mutex);
+ }
+
+ 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 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_DEBUG_KMS("pipe %c not active or no fb, skipping\n",
+ pipe_name(intel_crtc->pipe));
+ continue;
+ }
+
+ if (obj->base.size > max_size) {
+ DRM_DEBUG_KMS("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_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 (!crtc->state->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 = crtc->state->adjusted_mode.crtc_hdisplay;
+ cur_size = cur_size * fb->base.format->cpp[0];
+ 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]);
+ 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_DEBUG_KMS("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_DEBUG_KMS("fb not big enough for plane %c (%d vs %d)\n",
+ pipe_name(intel_crtc->pipe),
+ cur_size, max_size);
+ 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.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;
+
+ WARN(!crtc->primary->state->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)->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 (WARN_ON(!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, 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;
+}
+
+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 intel_fbdev *ifbdev, int state)
+{
+ 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_DEBUG_KMS("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.
+ */
+ 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 &&
+ 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(ifbdev, 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);
+}