Instead of calling prepare_flip right before calling finish_page_flip
do everything from prepare_page_flip in finish_page_flip.
Putting prepare and finish page_flip in a single step removes the need
for INTEL_FLIP_COMPLETE, so it can be removed. This simplifies the code
slightly.
Changes since v1:
- Invert if case to simplify code.
- Add missing barrier.
- Reword commit message.
Signed-off-by: Maarten Lankhorst <maarten.lankho...@linux.intel.com>
---
drivers/gpu/drm/i915/i915_debugfs.c | 3 --
drivers/gpu/drm/i915/i915_irq.c | 18 ++-----
drivers/gpu/drm/i915/intel_display.c | 92 ++++++++++++++----------------------
drivers/gpu/drm/i915/intel_drv.h | 2 -
4 files changed, 39 insertions(+), 76 deletions(-)
diff --git a/drivers/gpu/drm/i915/i915_debugfs.c
b/drivers/gpu/drm/i915/i915_debugfs.c
index 0092aaf47c43..def95532d421 100644
--- a/drivers/gpu/drm/i915/i915_debugfs.c
+++ b/drivers/gpu/drm/i915/i915_debugfs.c
@@ -619,9 +619,6 @@ static int i915_gem_pageflip_info(struct seq_file *m, void
*data)
if (pending == INTEL_FLIP_INACTIVE) {
seq_printf(m, "Flip ioctl preparing on pipe %c
(plane %c)\n",
pipe, plane);
- } else if (pending >= INTEL_FLIP_COMPLETE) {
- seq_printf(m, "Flip queued on pipe %c (plane
%c)\n",
- pipe, plane);
} else {
seq_printf(m, "Flip pending (waiting for vsync)
on pipe %c (plane %c)\n",
pipe, plane);
diff --git a/drivers/gpu/drm/i915/i915_irq.c b/drivers/gpu/drm/i915/i915_irq.c
index 93da4feb3048..86f7060d3ddb 100644
--- a/drivers/gpu/drm/i915/i915_irq.c
+++ b/drivers/gpu/drm/i915/i915_irq.c
@@ -1721,10 +1721,8 @@ static void valleyview_pipestat_irq_handler(struct
drm_device *dev,
intel_pipe_handle_vblank(dev, pipe))
intel_check_page_flip(dev, pipe);
- if (pipe_stats[pipe] & PLANE_FLIP_DONE_INT_STATUS_VLV) {
- intel_prepare_page_flip(dev, pipe);
+ if (pipe_stats[pipe] & PLANE_FLIP_DONE_INT_STATUS_VLV)
intel_finish_page_flip(dev, pipe);
- }
if (pipe_stats[pipe] & PIPE_CRC_DONE_INTERRUPT_STATUS)
i9xx_pipe_crc_irq_handler(dev, pipe);
@@ -2182,10 +2180,8 @@ static void ilk_display_irq_handler(struct drm_device
*dev, u32 de_iir)
i9xx_pipe_crc_irq_handler(dev, pipe);
/* plane/pipes map 1:1 on ilk+ */
- if (de_iir & DE_PLANE_FLIP_DONE(pipe)) {
- intel_prepare_page_flip(dev, pipe);
+ if (de_iir & DE_PLANE_FLIP_DONE(pipe))
intel_finish_page_flip_plane(dev, pipe);
- }
}
/* check event from PCH */
@@ -2229,10 +2225,8 @@ static void ivb_display_irq_handler(struct drm_device
*dev, u32 de_iir)
intel_check_page_flip(dev, pipe);
/* plane/pipes map 1:1 on ilk+ */
- if (de_iir & DE_PLANE_FLIP_DONE_IVB(pipe)) {
- intel_prepare_page_flip(dev, pipe);
+ if (de_iir & DE_PLANE_FLIP_DONE_IVB(pipe))
intel_finish_page_flip_plane(dev, pipe);
- }
}
/* check event from PCH */
@@ -2436,10 +2430,8 @@ gen8_de_irq_handler(struct drm_i915_private *dev_priv,
u32 master_ctl)
else
flip_done &= GEN8_PIPE_PRIMARY_FLIP_DONE;
- if (flip_done) {
- intel_prepare_page_flip(dev, pipe);
+ if (flip_done)
intel_finish_page_flip_plane(dev, pipe);
- }
if (iir & GEN8_PIPE_CDCLK_CRC_DONE)
hsw_pipe_crc_irq_handler(dev, pipe);
@@ -4025,7 +4017,6 @@ static bool i8xx_handle_vblank(struct drm_device *dev,
if (I915_READ16(ISR) & flip_pending)
goto check_page_flip;
- intel_prepare_page_flip(dev, plane);
intel_finish_page_flip(dev, pipe);
return true;
@@ -4216,7 +4207,6 @@ static bool i915_handle_vblank(struct drm_device *dev,
if (I915_READ(ISR) & flip_pending)
goto check_page_flip;
- intel_prepare_page_flip(dev, plane);
intel_finish_page_flip(dev, pipe);
return true;
diff --git a/drivers/gpu/drm/i915/intel_display.c
b/drivers/gpu/drm/i915/intel_display.c
index 97a8418f6539..ccbc2a448258 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -3118,7 +3118,6 @@ static void intel_complete_page_flips(struct drm_device
*dev)
struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
enum plane plane = intel_crtc->plane;
- intel_prepare_page_flip(dev, plane);
intel_finish_page_flip_plane(dev, plane);
}
}
@@ -10960,50 +10959,6 @@ static void intel_unpin_work_fn(struct work_struct
*__work)
kfree(work);
}
-static void do_intel_finish_page_flip(struct drm_device *dev,
- struct drm_crtc *crtc)
-{
- struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
- struct intel_unpin_work *work;
- unsigned long flags;
-
- /* Ignore early vblank irqs */
- if (intel_crtc == NULL)
- return;
-
- /*
- * This is called both by irq handlers and the reset code (to complete
- * lost pageflips) so needs the full irqsave spinlocks.
- */
- spin_lock_irqsave(&dev->event_lock, flags);
- work = intel_crtc->unpin_work;
-
- if (work && atomic_read(&work->pending) >= INTEL_FLIP_COMPLETE) {
- /* ensure that the unpin work is consistent wrt ->pending. */
- smp_mb__after_atomic();
-
- page_flip_completed(intel_crtc);
- }
-
- spin_unlock_irqrestore(&dev->event_lock, flags);
-}
-
-void intel_finish_page_flip(struct drm_device *dev, int pipe)
-{
- struct drm_i915_private *dev_priv = dev->dev_private;
- struct drm_crtc *crtc = dev_priv->pipe_to_crtc_mapping[pipe];
-
- do_intel_finish_page_flip(dev, crtc);
-}
-
-void intel_finish_page_flip_plane(struct drm_device *dev, int plane)
-{
- struct drm_i915_private *dev_priv = dev->dev_private;
- struct drm_crtc *crtc = dev_priv->plane_to_crtc_mapping[plane];
-
- do_intel_finish_page_flip(dev, crtc);
-}
-
/* Is 'a' after or equal to 'b'? */
static bool g4x_flip_count_after_eq(u32 a, u32 b)
{
@@ -11016,6 +10971,9 @@ static bool page_flip_finished(struct intel_crtc *crtc)
struct drm_i915_private *dev_priv = dev->dev_private;
unsigned reset_counter;
+ /* ensure that the unpin work is consistent wrt ->pending. */
+ smp_mb__after_atomic();
+
reset_counter = i915_reset_counter(&dev_priv->gpu_error);
if (crtc->reset_counter != reset_counter)
return true;
@@ -11057,28 +11015,48 @@ static bool page_flip_finished(struct intel_crtc
*crtc)
crtc->unpin_work->flip_count);
}
-void intel_prepare_page_flip(struct drm_device *dev, int plane)
+static void do_intel_finish_page_flip(struct drm_device *dev,
+ struct drm_crtc *crtc)
{
- struct drm_i915_private *dev_priv = dev->dev_private;
- struct intel_crtc *intel_crtc =
- to_intel_crtc(dev_priv->plane_to_crtc_mapping[plane]);
+ struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
+ struct intel_unpin_work *work;
unsigned long flags;
+ /* Ignore early vblank irqs */
+ if (intel_crtc == NULL)
+ return;
/*
* This is called both by irq handlers and the reset code (to complete
* lost pageflips) so needs the full irqsave spinlocks.
- *
- * NB: An MMIO update of the plane base pointer will also
- * generate a page-flip completion irq, i.e. every modeset
- * is also accompanied by a spurious intel_prepare_page_flip().
*/
spin_lock_irqsave(&dev->event_lock, flags);
- if (intel_crtc->unpin_work && page_flip_finished(intel_crtc))
- atomic_inc_not_zero(&intel_crtc->unpin_work->pending);
+ work = intel_crtc->unpin_work;
+
+ if (work != NULL &&
+ atomic_read(&work->pending) == INTEL_FLIP_PENDING &&
+ page_flip_finished(intel_crtc))
+ page_flip_completed(intel_crtc);
+
spin_unlock_irqrestore(&dev->event_lock, flags);
}
+void intel_finish_page_flip(struct drm_device *dev, int pipe)
+{
+ struct drm_i915_private *dev_priv = dev->dev_private;
+ struct drm_crtc *crtc = dev_priv->pipe_to_crtc_mapping[pipe];
+
+ do_intel_finish_page_flip(dev, crtc);
+}
+
+void intel_finish_page_flip_plane(struct drm_device *dev, int plane)
+{
+ struct drm_i915_private *dev_priv = dev->dev_private;
+ struct drm_crtc *crtc = dev_priv->plane_to_crtc_mapping[plane];
+
+ do_intel_finish_page_flip(dev, crtc);
+}
+
static inline void intel_mark_page_flip_active(struct intel_unpin_work *work)
{
/* Ensure that the work item is consistent when activating it ... */
@@ -11523,8 +11501,8 @@ static bool __intel_pageflip_stall_check(struct
drm_device *dev,
/* ensure that the unpin work is consistent wrt ->pending. */
smp_mb__after_atomic();
- if (pending != INTEL_FLIP_PENDING)
- return pending == INTEL_FLIP_COMPLETE;
+ if (pending == INTEL_FLIP_INACTIVE)
+ return false;
if (work->flip_ready_vblank == 0) {
if (work->flip_queued_req &&
diff --git a/drivers/gpu/drm/i915/intel_drv.h b/drivers/gpu/drm/i915/intel_drv.h
index 517baebb2399..fecc89600667 100644
--- a/drivers/gpu/drm/i915/intel_drv.h
+++ b/drivers/gpu/drm/i915/intel_drv.h
@@ -951,7 +951,6 @@ struct intel_unpin_work {
atomic_t pending;
#define INTEL_FLIP_INACTIVE 0
#define INTEL_FLIP_PENDING 1
-#define INTEL_FLIP_COMPLETE 2
u32 flip_count;
u32 gtt_offset;
struct drm_i915_gem_request *flip_queued_req;
@@ -1164,7 +1163,6 @@ struct drm_framebuffer *
__intel_framebuffer_create(struct drm_device *dev,
struct drm_mode_fb_cmd2 *mode_cmd,
struct drm_i915_gem_object *obj);
-void intel_prepare_page_flip(struct drm_device *dev, int plane);
void intel_finish_page_flip(struct drm_device *dev, int pipe);
void intel_finish_page_flip_plane(struct drm_device *dev, int plane);
void intel_check_page_flip(struct drm_device *dev, int pipe);
--
2.1.0
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