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drm/i915: Rework intel_crtc_page_flip to be almost atomic, v3. 

Create a work structure that will be used for all changes. This will
be used later on in the atomic commit function.

Changes since v1:
- Free old_crtc_state from unpin_work_fn properly.
Changes since v2:
- Add hunk for calling hw state verifier.
- Add missing support for color spaces.

Signed-off-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1463490484-19540-12-git-send-email-maarten.lankhorst@linux.intel.com
Reviewed-by: Patrik Jakobsson <patrik.jakobsson@linux.intel.com>
This commit is contained in:
Maarten Lankhorst 2016-05-17 15:07:54 +02:00
parent 84fc494b64
commit 143f73b3bf
3 changed files with 447 additions and 286 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

36
drivers/gpu/drm/i915/i915_debugfs.c
View File

@ -598,29 +598,43 @@ static void i915_dump_pageflip(struct seq_file *m,
struct intel_flip_work *work)
{
const char pipe = pipe_name(crtc->pipe);
const char plane = plane_name(crtc->plane);
u32 pending;
u32 addr;
int i;
pending = atomic_read(&work->pending);
if (pending) {
seq_printf(m, "Flip ioctl preparing on pipe %c (plane %c)\n",
pipe, plane);
pipe, plane_name(crtc->plane));
} else {
seq_printf(m, "Flip pending (waiting for vsync) on pipe %c (plane %c)\n",
pipe, plane);
pipe, plane_name(crtc->plane));
}
if (work->flip_queued_req) {
struct intel_engine_cs *engine = i915_gem_request_get_engine(work->flip_queued_req);
seq_printf(m, "Flip queued on %s at seqno %x, next seqno %x [current breadcrumb %x], completed? %d\n",
for (i = 0; i < work->num_planes; i++) {
struct intel_plane_state *old_plane_state = work->old_plane_state[i];
struct drm_plane *plane = old_plane_state->base.plane;
struct drm_i915_gem_request *req = old_plane_state->wait_req;
struct intel_engine_cs *engine;
seq_printf(m, "[PLANE:%i] part of flip.\n", plane->base.id);
if (!req) {
seq_printf(m, "Plane not associated with any engine\n");
continue;
}
engine = i915_gem_request_get_engine(req);
seq_printf(m, "Plane blocked on %s at seqno %x, next seqno %x [current breadcrumb %x], completed? %d\n",
engine->name,
i915_gem_request_get_seqno(work->flip_queued_req),
i915_gem_request_get_seqno(req),
dev_priv->next_seqno,
engine->get_seqno(engine),
i915_gem_request_completed(work->flip_queued_req, true));
} else
seq_printf(m, "Flip not associated with any ring\n");
i915_gem_request_completed(req, true));
}
seq_printf(m, "Flip queued on frame %d, (was ready on frame %d), now %d\n",
work->flip_queued_vblank,
work->flip_ready_vblank,
@ -633,7 +647,7 @@ static void i915_dump_pageflip(struct seq_file *m,
addr = I915_READ(DSPADDR(crtc->plane));
seq_printf(m, "Current scanout address 0x%08x\n", addr);
if (work->pending_flip_obj) {
if (work->flip_queued_req) {
seq_printf(m, "New framebuffer address 0x%08lx\n", (long)work->gtt_offset);
seq_printf(m, "MMIO update completed? %d\n", addr == work->gtt_offset);
}

684
drivers/gpu/drm/i915/intel_display.c
View File

@ -50,7 +50,7 @@
static bool is_mmio_work(struct intel_flip_work *work)
{
return work->mmio_work.func;
return !work->flip_queued_req;
}
/* Primary plane formats for gen <= 3 */
@ -123,6 +123,9 @@ static void ironlake_pfit_enable(struct intel_crtc *crtc);
static void intel_modeset_setup_hw_state(struct drm_device *dev);
static void intel_pre_disable_primary_noatomic(struct drm_crtc *crtc);
static int ilk_max_pixel_rate(struct drm_atomic_state *state);
static void intel_modeset_verify_crtc(struct drm_crtc *crtc,
struct drm_crtc_state *old_state,
struct drm_crtc_state *new_state);
struct intel_limit {
struct {
@ -2527,20 +2530,6 @@ out_unref_obj:
return false;
}
/* Update plane->state->fb to match plane->fb after driver-internal updates */
static void
update_state_fb(struct drm_plane *plane)
{
if (plane->fb == plane->state->fb)
return;
if (plane->state->fb)
drm_framebuffer_unreference(plane->state->fb);
plane->state->fb = plane->fb;
if (plane->state->fb)
drm_framebuffer_reference(plane->state->fb);
}
static void
intel_find_initial_plane_obj(struct intel_crtc *intel_crtc,
struct intel_initial_plane_config *plane_config)
@ -3806,19 +3795,27 @@ bool intel_has_pending_fb_unpin(struct drm_device *dev)
static void page_flip_completed(struct intel_crtc *intel_crtc, struct intel_flip_work *work)
{
struct drm_i915_private *dev_priv = to_i915(intel_crtc->base.dev);
list_del_init(&work->head);
struct drm_plane_state *new_plane_state;
struct drm_plane *primary = intel_crtc->base.primary;
if (work->event)
drm_crtc_send_vblank_event(&intel_crtc->base, work->event);
drm_crtc_vblank_put(&intel_crtc->base);
wake_up_all(&dev_priv->pending_flip_queue);
queue_work(dev_priv->wq, &work->unpin_work);
new_plane_state = &work->old_plane_state[0]->base;
if (work->num_planes >= 1 &&
new_plane_state->plane == primary &&
new_plane_state->fb)
trace_i915_flip_complete(intel_crtc->plane,
intel_fb_obj(new_plane_state->fb));
trace_i915_flip_complete(intel_crtc->plane,
work->pending_flip_obj);
if (work->can_async_unpin) {
list_del_init(&work->head);
wake_up_all(&dev_priv->pending_flip_queue);
}
queue_work(dev_priv->wq, &work->unpin_work);
}
static int intel_crtc_wait_for_pending_flips(struct drm_crtc *crtc)
@ -3849,7 +3846,9 @@ static int intel_crtc_wait_for_pending_flips(struct drm_crtc *crtc)
*/
work = list_first_entry_or_null(&intel_crtc->flip_work,
struct intel_flip_work, head);
if (work && !is_mmio_work(work)) {
if (work && !is_mmio_work(work) &&
!work_busy(&work->unpin_work)) {
WARN_ONCE(1, "Removing stuck page flip\n");
page_flip_completed(intel_crtc, work);
}
@ -10850,31 +10849,112 @@ static void intel_crtc_destroy(struct drm_crtc *crtc)
kfree(intel_crtc);
}
static void intel_crtc_post_flip_update(struct intel_flip_work *work,
struct drm_crtc *crtc)
{
struct intel_crtc_state *crtc_state = work->new_crtc_state;
struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
if (crtc_state->disable_cxsr)
intel_crtc->wm.cxsr_allowed = true;
if (crtc_state->update_wm_post && crtc_state->base.active)
intel_update_watermarks(crtc);
if (work->num_planes > 0 &&
work->old_plane_state[0]->base.plane == crtc->primary) {
struct intel_plane_state *plane_state =
work->new_plane_state[0];
if (plane_state->visible &&
(needs_modeset(&crtc_state->base) ||
!work->old_plane_state[0]->visible))
intel_post_enable_primary(crtc);
}
}
static void intel_unpin_work_fn(struct work_struct *__work)
{
struct intel_flip_work *work =
container_of(__work, struct intel_flip_work, unpin_work);
struct intel_crtc *crtc = to_intel_crtc(work->crtc);
struct drm_device *dev = crtc->base.dev;
struct drm_plane *primary = crtc->base.primary;
struct drm_crtc *crtc = work->old_crtc_state->base.crtc;
struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
struct drm_device *dev = crtc->dev;
struct drm_i915_private *dev_priv = dev->dev_private;
int i;
if (is_mmio_work(work))
flush_work(&work->mmio_work);
if (work->fb_bits)
intel_frontbuffer_flip_complete(dev, work->fb_bits);
mutex_lock(&dev->struct_mutex);
intel_unpin_fb_obj(work->old_fb, primary->state->rotation);
drm_gem_object_unreference(&work->pending_flip_obj->base);
/*
* Unless work->can_async_unpin is false, there's no way to ensure
* that work->new_crtc_state contains valid memory during unpin
* because intel_atomic_commit may free it before this runs.
*/
if (!work->can_async_unpin)
intel_crtc_post_flip_update(work, crtc);
if (work->fb_bits & to_intel_plane(crtc->primary)->frontbuffer_bit)
intel_fbc_post_update(intel_crtc);
if (work->put_power_domains)
modeset_put_power_domains(dev_priv, work->put_power_domains);
/* Make sure mmio work is completely finished before freeing all state here. */
flush_work(&work->mmio_work);
if (!work->can_async_unpin)
/* This must be called before work is unpinned for serialization. */
intel_modeset_verify_crtc(crtc, &work->old_crtc_state->base,
&work->new_crtc_state->base);
if (!work->can_async_unpin || !list_empty(&work->head)) {
spin_lock_irq(&dev->event_lock);
WARN(list_empty(&work->head) != work->can_async_unpin,
"[CRTC:%i] Pin work %p async %i with %i planes, active %i -> %i ms %i\n",
crtc->base.id, work, work->can_async_unpin, work->num_planes,
work->old_crtc_state->base.active, work->new_crtc_state->base.active,
needs_modeset(&work->new_crtc_state->base));
if (!list_empty(&work->head))
list_del(&work->head);
wake_up_all(&dev_priv->pending_flip_queue);
spin_unlock_irq(&dev->event_lock);
}
intel_crtc_destroy_state(crtc, &work->old_crtc_state->base);
if (work->flip_queued_req)
i915_gem_request_assign(&work->flip_queued_req, NULL);
mutex_unlock(&dev->struct_mutex);
i915_gem_request_unreference(work->flip_queued_req);
intel_frontbuffer_flip_complete(dev, to_intel_plane(primary)->frontbuffer_bit);
intel_fbc_post_update(crtc);
drm_framebuffer_unreference(work->old_fb);
for (i = 0; i < work->num_planes; i++) {
struct intel_plane_state *old_plane_state =
work->old_plane_state[i];
struct drm_framebuffer *old_fb = old_plane_state->base.fb;
struct drm_plane *plane = old_plane_state->base.plane;
struct drm_i915_gem_request *req;
BUG_ON(atomic_read(&crtc->unpin_work_count) == 0);
atomic_dec(&crtc->unpin_work_count);
req = old_plane_state->wait_req;
old_plane_state->wait_req = NULL;
i915_gem_request_unreference(req);
fence_put(old_plane_state->base.fence);
old_plane_state->base.fence = NULL;
if (old_fb &&
(plane->type != DRM_PLANE_TYPE_CURSOR ||
!INTEL_INFO(dev_priv)->cursor_needs_physical)) {
mutex_lock(&dev->struct_mutex);
intel_unpin_fb_obj(old_fb, old_plane_state->base.rotation);
mutex_unlock(&dev->struct_mutex);
}
intel_plane_destroy_state(plane, &old_plane_state->base);
}
if (!WARN_ON(atomic_read(&intel_crtc->unpin_work_count) == 0))
atomic_dec(&intel_crtc->unpin_work_count);
kfree(work);
}
@ -10988,7 +11068,8 @@ void intel_finish_page_flip_cs(struct drm_i915_private *dev_priv, int pipe)
if (is_mmio_work(work))
break;
if (!pageflip_finished(intel_crtc, work))
if (!pageflip_finished(intel_crtc, work) ||
work_busy(&work->unpin_work))
break;
page_flip_completed(intel_crtc, work);
@ -11021,7 +11102,8 @@ void intel_finish_page_flip_mmio(struct drm_i915_private *dev_priv, int pipe)
if (!is_mmio_work(work))
break;
if (!pageflip_finished(intel_crtc, work))
if (!pageflip_finished(intel_crtc, work) ||
work_busy(&work->unpin_work))
break;
page_flip_completed(intel_crtc, work);
@ -11270,70 +11352,204 @@ static int intel_gen7_queue_flip(struct drm_device *dev,
return 0;
}
static bool use_mmio_flip(struct intel_engine_cs *engine,
struct drm_i915_gem_object *obj)
static struct intel_engine_cs *
intel_get_flip_engine(struct drm_device *dev,
struct drm_i915_private *dev_priv,
struct drm_i915_gem_object *obj)
{
/*
* This is not being used for older platforms, because
* non-availability of flip done interrupt forces us to use
* CS flips. Older platforms derive flip done using some clever
* tricks involving the flip_pending status bits and vblank irqs.
* So using MMIO flips there would disrupt this mechanism.
*/
if (IS_VALLEYVIEW(dev) || IS_IVYBRIDGE(dev) || IS_HASWELL(dev))
return &dev_priv->engine[BCS];
if (engine == NULL)
return true;
if (dev_priv->info.gen >= 7) {
struct intel_engine_cs *engine;
if (i915.use_mmio_flip < 0)
engine = i915_gem_request_get_engine(obj->last_write_req);
if (engine && engine->id == RCS)
return engine;
return &dev_priv->engine[BCS];
} else
return &dev_priv->engine[RCS];
}
static bool
flip_fb_compatible(struct drm_device *dev,
struct drm_framebuffer *fb,
struct drm_framebuffer *old_fb)
{
struct drm_i915_gem_object *obj = intel_fb_obj(fb);
struct drm_i915_gem_object *old_obj = intel_fb_obj(old_fb);
if (old_fb->pixel_format != fb->pixel_format)
return false;
else if (i915.use_mmio_flip > 0)
return true;
else if (i915.enable_execlists)
return true;
else if (obj->base.dma_buf &&
!reservation_object_test_signaled_rcu(obj->base.dma_buf->resv,
false))
return true;
else
return engine != i915_gem_request_get_engine(obj->last_write_req);
if (INTEL_INFO(dev)->gen > 3 &&
(fb->offsets[0] != old_fb->offsets[0] ||
fb->pitches[0] != old_fb->pitches[0]))
return false;
/* vlv: DISPLAY_FLIP fails to change tiling */
if (IS_VALLEYVIEW(dev) && obj->tiling_mode != old_obj->tiling_mode)
return false;
return true;
}
static void
intel_display_flip_prepare(struct drm_device *dev, struct drm_crtc *crtc,
struct intel_flip_work *work)
{
struct drm_i915_private *dev_priv = dev->dev_private;
struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
if (work->flip_prepared)
return;
work->flip_prepared = true;
if (INTEL_INFO(dev)->gen >= 5 || IS_G4X(dev))
work->flip_count = I915_READ(PIPE_FLIPCOUNT_G4X(intel_crtc->pipe)) + 1;
work->flip_queued_vblank = drm_crtc_vblank_count(crtc);
intel_frontbuffer_flip_prepare(dev, work->new_crtc_state->fb_bits);
}
static void intel_flip_schedule_request(struct intel_flip_work *work, struct drm_crtc *crtc)
{
struct drm_device *dev = crtc->dev;
struct drm_i915_private *dev_priv = dev->dev_private;
struct intel_plane_state *new_state = work->new_plane_state[0];
struct intel_plane_state *old_state = work->old_plane_state[0];
struct drm_framebuffer *fb, *old_fb;
struct drm_i915_gem_request *request = NULL;
struct intel_engine_cs *engine;
struct drm_i915_gem_object *obj;
struct fence *fence;
int ret;
to_intel_crtc(crtc)->reset_counter = i915_reset_counter(&dev_priv->gpu_error);
if (__i915_reset_in_progress_or_wedged(to_intel_crtc(crtc)->reset_counter))
goto mmio;
if (i915_terminally_wedged(&dev_priv->gpu_error) ||
i915_reset_in_progress(&dev_priv->gpu_error) ||
i915.enable_execlists || i915.use_mmio_flip > 0 ||
!dev_priv->display.queue_flip)
goto mmio;
/* Not right after modesetting, surface parameters need to be updated */
if (needs_modeset(crtc->state) ||
to_intel_crtc_state(crtc->state)->update_pipe)
goto mmio;
/* Only allow a mmio flip for a primary plane without a dma-buf fence */
if (work->num_planes != 1 ||
new_state->base.plane != crtc->primary ||
new_state->base.fence)
goto mmio;
fence = work->old_plane_state[0]->base.fence;
if (fence && !fence_is_signaled(fence))
goto mmio;
old_fb = old_state->base.fb;
fb = new_state->base.fb;
obj = intel_fb_obj(fb);
trace_i915_flip_request(to_intel_crtc(crtc)->plane, obj);
/* Only when updating a already visible fb. */
if (!new_state->visible || !old_state->visible)
goto mmio;
if (!flip_fb_compatible(dev, fb, old_fb))
goto mmio;
engine = intel_get_flip_engine(dev, dev_priv, obj);
if (i915.use_mmio_flip == 0 && obj->last_write_req &&
i915_gem_request_get_engine(obj->last_write_req) != engine)
goto mmio;
work->gtt_offset = intel_plane_obj_offset(to_intel_plane(crtc->primary), obj, 0);
work->gtt_offset += to_intel_crtc(crtc)->dspaddr_offset;
ret = i915_gem_object_sync(obj, engine, &request);
if (!ret && !request) {
request = i915_gem_request_alloc(engine, NULL);
ret = PTR_ERR_OR_ZERO(request);
if (ret)
request = NULL;
}
intel_display_flip_prepare(dev, crtc, work);
if (!ret)
ret = dev_priv->display.queue_flip(dev, crtc, fb, obj, request, 0);
if (!ret) {
i915_gem_request_assign(&work->flip_queued_req, request);
intel_mark_page_flip_active(to_intel_crtc(crtc), work);
i915_add_request_no_flush(request);
return;
}
if (request)
i915_add_request_no_flush(request);
mmio:
schedule_work(&work->mmio_work);
}
static void intel_mmio_flip_work_func(struct work_struct *w)
{
struct intel_flip_work *work =
container_of(w, struct intel_flip_work, mmio_work);
struct intel_crtc *crtc = to_intel_crtc(work->crtc);
struct drm_device *dev = crtc->base.dev;
struct drm_crtc *crtc = work->old_crtc_state->base.crtc;
struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
struct intel_crtc_state *crtc_state = work->new_crtc_state;
struct drm_device *dev = crtc->dev;
struct drm_i915_private *dev_priv = dev->dev_private;
struct intel_plane *primary = to_intel_plane(crtc->base.primary);
struct drm_i915_gem_object *obj = intel_fb_obj(primary->base.state->fb);
struct drm_i915_gem_request *req;
int i;
if (work->flip_queued_req)
WARN_ON(__i915_wait_request(work->flip_queued_req,
false, NULL,
for (i = 0; i < work->num_planes; i++) {
struct intel_plane_state *old_plane_state = work->old_plane_state[i];
/* For framebuffer backed by dmabuf, wait for fence */
if (old_plane_state->base.fence)
WARN_ON(fence_wait(old_plane_state->base.fence, false) < 0);
req = old_plane_state->wait_req;
if (!req)
continue;
WARN_ON(__i915_wait_request(req, false, NULL,
&dev_priv->rps.mmioflips));
}
/* For framebuffer backed by dmabuf, wait for fence */
if (obj->base.dma_buf)
WARN_ON(reservation_object_wait_timeout_rcu(obj->base.dma_buf->resv,
false, false,
MAX_SCHEDULE_TIMEOUT) < 0);
intel_display_flip_prepare(dev, crtc, work);
intel_pipe_update_start(crtc);
primary->update_plane(&primary->base,
crtc->config,
to_intel_plane_state(primary->base.state));
intel_pipe_update_end(crtc, work);
}
intel_pipe_update_start(intel_crtc);
if (!needs_modeset(&crtc_state->base)) {
if (crtc_state->base.color_mgmt_changed || crtc_state->update_pipe) {
intel_color_set_csc(&crtc_state->base);
intel_color_load_luts(&crtc_state->base);
}
static int intel_default_queue_flip(struct drm_device *dev,
struct drm_crtc *crtc,
struct drm_framebuffer *fb,
struct drm_i915_gem_object *obj,
struct drm_i915_gem_request *req,
uint64_t gtt_offset)
{
return -ENODEV;
if (crtc_state->update_pipe)
intel_update_pipe_config(intel_crtc, work->old_crtc_state);
else if (INTEL_INFO(dev)->gen >= 9)
skl_detach_scalers(intel_crtc);
}
for (i = 0; i < work->num_planes; i++) {
struct intel_plane_state *new_plane_state = work->new_plane_state[i];
struct intel_plane *plane = to_intel_plane(new_plane_state->base.plane);
plane->update_plane(&plane->base, crtc_state, new_plane_state);
}
intel_pipe_update_end(intel_crtc, work);
}
static bool __pageflip_stall_check_cs(struct drm_i915_private *dev_priv,
@ -11342,7 +11558,8 @@ static bool __pageflip_stall_check_cs(struct drm_i915_private *dev_priv,
{
u32 addr, vblank;
if (!atomic_read(&work->pending))
if (!atomic_read(&work->pending) ||
work_busy(&work->unpin_work))
return false;
smp_rmb();
@ -11409,6 +11626,33 @@ void intel_check_page_flip(struct drm_i915_private *dev_priv, int pipe)
spin_unlock(&dev->event_lock);
}
static struct fence *intel_get_excl_fence(struct drm_i915_gem_object *obj)
{
struct reservation_object *resv;
if (!obj->base.dma_buf)
return NULL;
resv = obj->base.dma_buf->resv;
/* For framebuffer backed by dmabuf, wait for fence */
while (1) {
struct fence *fence_excl, *ret = NULL;
rcu_read_lock();
fence_excl = rcu_dereference(resv->fence_excl);
if (fence_excl)
ret = fence_get_rcu(fence_excl);
rcu_read_unlock();
if (ret == fence_excl)
return ret;
}
}
static int intel_crtc_page_flip(struct drm_crtc *crtc,
struct drm_framebuffer *fb,
struct drm_pending_vblank_event *event,
@ -11416,17 +11660,20 @@ static int intel_crtc_page_flip(struct drm_crtc *crtc,
{
struct drm_device *dev = crtc->dev;
struct drm_i915_private *dev_priv = dev->dev_private;
struct drm_framebuffer *old_fb = crtc->primary->fb;
struct drm_plane_state *old_state, *new_state = NULL;
struct drm_crtc_state *new_crtc_state = NULL;
struct drm_framebuffer *old_fb = crtc->primary->state->fb;
struct drm_i915_gem_object *obj = intel_fb_obj(fb);
struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
struct drm_plane *primary = crtc->primary;
enum pipe pipe = intel_crtc->pipe;
struct intel_flip_work *work;
struct intel_engine_cs *engine;
bool mmio_flip;
struct drm_i915_gem_request *request = NULL;
int ret;
old_state = crtc->primary->state;
if (!crtc->state->active)
return -EINVAL;
/*
* drm_mode_page_flip_ioctl() should already catch this, but double
* check to be safe. In the future we may enable pageflipping from
@ -11436,7 +11683,7 @@ static int intel_crtc_page_flip(struct drm_crtc *crtc,
return -EBUSY;
/* Can't change pixel format via MI display flips. */
if (fb->pixel_format != crtc->primary->fb->pixel_format)
if (fb->pixel_format != old_fb->pixel_format)
return -EINVAL;
/*
@ -11444,25 +11691,44 @@ static int intel_crtc_page_flip(struct drm_crtc *crtc,
* Note that pitch changes could also affect these register.
*/
if (INTEL_INFO(dev)->gen > 3 &&
(fb->offsets[0] != crtc->primary->fb->offsets[0] ||
fb->pitches[0] != crtc->primary->fb->pitches[0]))
(fb->offsets[0] != old_fb->offsets[0] ||
fb->pitches[0] != old_fb->pitches[0]))
return -EINVAL;
if (i915_terminally_wedged(&dev_priv->gpu_error))
goto out_hang;
work = kzalloc(sizeof(*work), GFP_KERNEL);
if (work == NULL)
return -ENOMEM;
new_crtc_state = intel_crtc_duplicate_state(crtc);
new_state = intel_plane_duplicate_state(primary);
if (!work || !new_crtc_state || !new_state) {
ret = -ENOMEM;
goto cleanup;
}
drm_framebuffer_unreference(new_state->fb);
drm_framebuffer_reference(fb);
new_state->fb = fb;
work->event = event;
work->crtc = crtc;
work->old_fb = old_fb;
INIT_WORK(&work->unpin_work, intel_unpin_work_fn);
INIT_WORK(&work->mmio_work, intel_mmio_flip_work_func);
work->new_crtc_state = to_intel_crtc_state(new_crtc_state);
work->old_crtc_state = intel_crtc->config;
work->fb_bits = to_intel_plane(primary)->frontbuffer_bit;
work->new_crtc_state->fb_bits = work->fb_bits;
work->can_async_unpin = true;
work->num_planes = 1;
work->old_plane_state[0] = to_intel_plane_state(old_state);
work->new_plane_state[0] = to_intel_plane_state(new_state);
/* Step 1: vblank waiting and workqueue throttling,
* similar to intel_atomic_prepare_commit
*/
ret = drm_crtc_vblank_get(crtc);
if (ret)
goto free_work;
goto cleanup;
/* We borrow the event spin lock for protecting flip_work */
spin_lock_irq(&dev->event_lock);
@ -11482,9 +11748,8 @@ static int intel_crtc_page_flip(struct drm_crtc *crtc,
DRM_DEBUG_DRIVER("flip queue: crtc already busy\n");
spin_unlock_irq(&dev->event_lock);
drm_crtc_vblank_put(crtc);
kfree(work);
return -EBUSY;
ret = -EBUSY;
goto cleanup_vblank;
}
}
list_add_tail(&work->head, &intel_crtc->flip_work);
@ -11493,160 +11758,62 @@ static int intel_crtc_page_flip(struct drm_crtc *crtc,
if (atomic_read(&intel_crtc->unpin_work_count) >= 2)
flush_workqueue(dev_priv->wq);
/* Reference the objects for the scheduled work. */
drm_framebuffer_reference(work->old_fb);
drm_gem_object_reference(&obj->base);
crtc->primary->fb = fb;
update_state_fb(crtc->primary);
intel_fbc_pre_update(intel_crtc);
work->pending_flip_obj = obj;
ret = i915_mutex_lock_interruptible(dev);
/* step 2, similar to intel_prepare_plane_fb */
ret = mutex_lock_interruptible(&dev->struct_mutex);
if (ret)
goto cleanup;
goto cleanup_work;
intel_crtc->reset_counter = i915_reset_counter(&dev_priv->gpu_error);
if (__i915_reset_in_progress_or_wedged(intel_crtc->reset_counter)) {
ret = -EIO;
goto cleanup;
}
atomic_inc(&intel_crtc->unpin_work_count);
if (INTEL_INFO(dev)->gen >= 5 || IS_G4X(dev))
work->flip_count = I915_READ(PIPE_FLIPCOUNT_G4X(pipe)) + 1;
if (IS_VALLEYVIEW(dev) || IS_CHERRYVIEW(dev)) {
engine = &dev_priv->engine[BCS];
if (obj->tiling_mode != intel_fb_obj(work->old_fb)->tiling_mode)
/* vlv: DISPLAY_FLIP fails to change tiling */
engine = NULL;
} else if (IS_IVYBRIDGE(dev) || IS_HASWELL(dev)) {
engine = &dev_priv->engine[BCS];
} else if (INTEL_INFO(dev)->gen >= 7) {
engine = i915_gem_request_get_engine(obj->last_write_req);
if (engine == NULL || engine->id != RCS)
engine = &dev_priv->engine[BCS];
} else {
engine = &dev_priv->engine[RCS];
}
mmio_flip = use_mmio_flip(engine, obj);
/* When using CS flips, we want to emit semaphores between rings.
* However, when using mmio flips we will create a task to do the
* synchronisation, so all we want here is to pin the framebuffer
* into the display plane and skip any waits.
*/
if (!mmio_flip) {
ret = i915_gem_object_sync(obj, engine, &request);
if (!ret && !request) {
request = i915_gem_request_alloc(engine, NULL);
ret = PTR_ERR_OR_ZERO(request);
}
if (ret)
goto cleanup_pending;
}
ret = intel_pin_and_fence_fb_obj(fb, primary->state->rotation);
ret = intel_pin_and_fence_fb_obj(fb, new_state->rotation);
if (ret)
goto cleanup_pending;
work->gtt_offset = intel_plane_obj_offset(to_intel_plane(primary),
obj, 0);
work->gtt_offset += intel_crtc->dspaddr_offset;
if (mmio_flip) {
INIT_WORK(&work->mmio_work, intel_mmio_flip_work_func);
i915_gem_request_assign(&work->flip_queued_req,
obj->last_write_req);
schedule_work(&work->mmio_work);
} else {
i915_gem_request_assign(&work->flip_queued_req, request);
ret = dev_priv->display.queue_flip(dev, crtc, fb, obj, request,
work->gtt_offset);
if (ret)
goto cleanup_unpin;
intel_mark_page_flip_active(intel_crtc, work);
i915_add_request_no_flush(request);
}
goto cleanup_unlock;
i915_gem_track_fb(intel_fb_obj(old_fb), obj,
to_intel_plane(primary)->frontbuffer_bit);
mutex_unlock(&dev->struct_mutex);
intel_frontbuffer_flip_prepare(dev,
to_intel_plane(primary)->frontbuffer_bit);
/* point of no return, swap state */
primary->state = new_state;
crtc->state = new_crtc_state;
intel_crtc->config = to_intel_crtc_state(new_crtc_state);
primary->fb = fb;
/* scheduling flip work */
atomic_inc(&intel_crtc->unpin_work_count);
if (obj->last_write_req &&
!i915_gem_request_completed(obj->last_write_req, true))
i915_gem_request_assign(&work->old_plane_state[0]->wait_req,
obj->last_write_req);
if (obj->base.dma_buf)
work->old_plane_state[0]->base.fence = intel_get_excl_fence(obj);
intel_fbc_pre_update(intel_crtc);
intel_flip_schedule_request(work, crtc);
mutex_unlock(&dev->struct_mutex);
trace_i915_flip_request(intel_crtc->plane, obj);
return 0;
cleanup_unpin:
intel_unpin_fb_obj(fb, crtc->primary->state->rotation);
cleanup_pending:
if (!IS_ERR_OR_NULL(request))
i915_add_request_no_flush(request);
atomic_dec(&intel_crtc->unpin_work_count);
cleanup_unlock:
mutex_unlock(&dev->struct_mutex);
cleanup:
crtc->primary->fb = old_fb;
update_state_fb(crtc->primary);
drm_gem_object_unreference_unlocked(&obj->base);
drm_framebuffer_unreference(work->old_fb);
cleanup_work:
spin_lock_irq(&dev->event_lock);
list_del(&work->head);
spin_unlock_irq(&dev->event_lock);
cleanup_vblank:
drm_crtc_vblank_put(crtc);
free_work:
cleanup:
if (new_state)
intel_plane_destroy_state(primary, new_state);
if (new_crtc_state)
intel_crtc_destroy_state(crtc, new_crtc_state);
kfree(work);
if (ret == -EIO) {
struct drm_atomic_state *state;
struct drm_plane_state *plane_state;
out_hang:
state = drm_atomic_state_alloc(dev);
if (!state)
return -ENOMEM;
state->acquire_ctx = drm_modeset_legacy_acquire_ctx(crtc);
retry:
plane_state = drm_atomic_get_plane_state(state, primary);
ret = PTR_ERR_OR_ZERO(plane_state);
if (!ret) {
drm_atomic_set_fb_for_plane(plane_state, fb);
ret = drm_atomic_set_crtc_for_plane(plane_state, crtc);
if (!ret)
ret = drm_atomic_commit(state);
}
if (ret == -EDEADLK) {
drm_modeset_backoff(state->acquire_ctx);
drm_atomic_state_clear(state);
goto retry;
}
if (ret)
drm_atomic_state_free(state);
if (ret == 0 && event) {
spin_lock_irq(&dev->event_lock);
drm_crtc_send_vblank_event(crtc, event);
spin_unlock_irq(&dev->event_lock);
}
}
return ret;
}
@ -13690,33 +13857,6 @@ static const struct drm_crtc_funcs intel_crtc_funcs = {
.atomic_destroy_state = intel_crtc_destroy_state,
};
static struct fence *intel_get_excl_fence(struct drm_i915_gem_object *obj)
{
struct reservation_object *resv;
if (!obj->base.dma_buf)
return NULL;
resv = obj->base.dma_buf->resv;
/* For framebuffer backed by dmabuf, wait for fence */
while (1) {
struct fence *fence_excl, *ret = NULL;
rcu_read_lock();
fence_excl = rcu_dereference(resv->fence_excl);
if (fence_excl)
ret = fence_get_rcu(fence_excl);
rcu_read_unlock();
if (ret == fence_excl)
return ret;
}
}
/**
* intel_prepare_plane_fb - Prepare fb for usage on plane
* @plane: drm plane to prepare for
@ -15016,7 +15156,7 @@ void intel_init_display_hooks(struct drm_i915_private *dev_priv)
/* Drop through - unsupported since execlist only. */
default:
/* Default just returns -ENODEV to indicate unsupported */
dev_priv->display.queue_flip = intel_default_queue_flip;
break;
}
}
@ -15975,9 +16115,9 @@ void intel_modeset_gem_init(struct drm_device *dev)
DRM_ERROR("failed to pin boot fb on pipe %d\n",
to_intel_crtc(c)->pipe);
drm_framebuffer_unreference(c->primary->fb);
c->primary->fb = NULL;
drm_framebuffer_unreference(c->primary->state->fb);
c->primary->fb = c->primary->state->fb = NULL;
c->primary->crtc = c->primary->state->crtc = NULL;
update_state_fb(c->primary);
c->state->plane_mask &= ~(1 << drm_plane_index(c->primary));
}
}

13
drivers/gpu/drm/i915/intel_drv.h
View File

@ -975,9 +975,6 @@ struct intel_flip_work {
struct work_struct unpin_work;
struct work_struct mmio_work;
struct drm_crtc *crtc;
struct drm_framebuffer *old_fb;
struct drm_i915_gem_object *pending_flip_obj;
struct drm_pending_vblank_event *event;
atomic_t pending;
u32 flip_count;
@ -985,6 +982,16 @@ struct intel_flip_work {
struct drm_i915_gem_request *flip_queued_req;
u32 flip_queued_vblank;
u32 flip_ready_vblank;
unsigned put_power_domains;
unsigned num_planes;
bool can_async_unpin, flip_prepared;
unsigned fb_bits;
struct intel_crtc_state *old_crtc_state, *new_crtc_state;
struct intel_plane_state *old_plane_state[I915_MAX_PLANES + 1];
struct intel_plane_state *new_plane_state[I915_MAX_PLANES + 1];
};
struct intel_load_detect_pipe {