[PATCH v2 04/21] drm/i915: Remove intel_prepare_page_flip, v3.
Maarten Lankhorst
maarten.lankhorst at linux.intel.com
Tue May 17 12:26:43 UTC 2016
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.
Changes since v2:
- intel_page_flip_plane is removed.
- work->pending is turned into a bool.
Signed-off-by: Maarten Lankhorst <maarten.lankhorst at linux.intel.com>
---
drivers/gpu/drm/i915/i915_debugfs.c | 5 +--
drivers/gpu/drm/i915/i915_irq.c | 18 ++-------
drivers/gpu/drm/i915/intel_display.c | 72 +++++++++++-------------------------
drivers/gpu/drm/i915/intel_drv.h | 4 --
4 files changed, 26 insertions(+), 73 deletions(-)
diff --git a/drivers/gpu/drm/i915/i915_debugfs.c b/drivers/gpu/drm/i915/i915_debugfs.c
index f23b119a365d..6bff6b4daf99 100644
--- a/drivers/gpu/drm/i915/i915_debugfs.c
+++ b/drivers/gpu/drm/i915/i915_debugfs.c
@@ -619,12 +619,9 @@ static int i915_gem_pageflip_info(struct seq_file *m, void *data)
u32 addr;
pending = atomic_read(&work->pending);
- if (pending == INTEL_FLIP_INACTIVE) {
+ if (pending) {
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 920a5e4abb70..148741646fb0 100644
--- a/drivers/gpu/drm/i915/i915_irq.c
+++ b/drivers/gpu/drm/i915/i915_irq.c
@@ -1705,10 +1705,8 @@ static void valleyview_pipestat_irq_handler(struct drm_i915_private *dev_priv,
intel_pipe_handle_vblank(dev_priv, pipe))
intel_check_page_flip(dev_priv, pipe);
- if (pipe_stats[pipe] & PLANE_FLIP_DONE_INT_STATUS_VLV) {
- intel_prepare_page_flip(dev_priv, pipe);
+ if (pipe_stats[pipe] & PLANE_FLIP_DONE_INT_STATUS_VLV)
intel_finish_page_flip(dev_priv, pipe);
- }
if (pipe_stats[pipe] & PIPE_CRC_DONE_INTERRUPT_STATUS)
i9xx_pipe_crc_irq_handler(dev_priv, pipe);
@@ -2162,10 +2160,8 @@ static void ilk_display_irq_handler(struct drm_i915_private *dev_priv,
i9xx_pipe_crc_irq_handler(dev_priv, pipe);
/* plane/pipes map 1:1 on ilk+ */
- if (de_iir & DE_PLANE_FLIP_DONE(pipe)) {
- intel_prepare_page_flip(dev_priv, pipe);
+ if (de_iir & DE_PLANE_FLIP_DONE(pipe))
intel_finish_page_flip(dev_priv, pipe);
- }
}
/* check event from PCH */
@@ -2209,10 +2205,8 @@ static void ivb_display_irq_handler(struct drm_i915_private *dev_priv,
intel_check_page_flip(dev_priv, pipe);
/* plane/pipes map 1:1 on ilk+ */
- if (de_iir & DE_PLANE_FLIP_DONE_IVB(pipe)) {
- intel_prepare_page_flip(dev_priv, pipe);
+ if (de_iir & DE_PLANE_FLIP_DONE_IVB(pipe))
intel_finish_page_flip(dev_priv, pipe);
- }
}
/* check event from PCH */
@@ -2417,10 +2411,8 @@ 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_priv, pipe);
+ if (flip_done)
intel_finish_page_flip(dev_priv, pipe);
- }
if (iir & GEN8_PIPE_CDCLK_CRC_DONE)
hsw_pipe_crc_irq_handler(dev_priv, pipe);
@@ -3998,7 +3990,6 @@ static bool i8xx_handle_vblank(struct drm_i915_private *dev_priv,
if (I915_READ16(ISR) & flip_pending)
goto check_page_flip;
- intel_prepare_page_flip(dev_priv, plane);
intel_finish_page_flip(dev_priv, pipe);
return true;
@@ -4188,7 +4179,6 @@ static bool i915_handle_vblank(struct drm_i915_private *dev_priv,
if (I915_READ(ISR) & flip_pending)
goto check_page_flip;
- intel_prepare_page_flip(dev_priv, plane);
intel_finish_page_flip(dev_priv, pipe);
return true;
diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index 535f20ab2870..d6e90fa888cf 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -3112,10 +3112,8 @@ static void intel_complete_page_flips(struct drm_i915_private *dev_priv)
{
struct intel_crtc *crtc;
- for_each_intel_crtc(dev_priv->dev, crtc) {
- intel_prepare_page_flip(dev_priv, crtc->plane);
+ for_each_intel_crtc(dev_priv->dev, crtc)
intel_finish_page_flip(dev_priv, crtc->pipe);
- }
}
static void intel_update_primary_planes(struct drm_device *dev)
@@ -10866,42 +10864,6 @@ static void intel_unpin_work_fn(struct work_struct *__work)
kfree(work);
}
-static void do_intel_finish_page_flip(struct drm_i915_private *dev_priv,
- struct drm_crtc *crtc)
-{
- struct drm_device *dev = dev_priv->dev;
- 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_rmb();
-
- page_flip_completed(intel_crtc);
- }
-
- spin_unlock_irqrestore(&dev->event_lock, flags);
-}
-
-void intel_finish_page_flip(struct drm_i915_private *dev_priv, int pipe)
-{
- struct drm_crtc *crtc = dev_priv->pipe_to_crtc_mapping[pipe];
-
- do_intel_finish_page_flip(dev_priv, crtc);
-}
-
/* Is 'a' after or equal to 'b'? */
static bool g4x_flip_count_after_eq(u32 a, u32 b)
{
@@ -10914,6 +10876,9 @@ 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_rmb();
+
reset_counter = i915_reset_counter(&dev_priv->gpu_error);
if (crtc->reset_counter != reset_counter)
return true;
@@ -10955,25 +10920,30 @@ static bool page_flip_finished(struct intel_crtc *crtc)
crtc->unpin_work->flip_count);
}
-void intel_prepare_page_flip(struct drm_i915_private *dev_priv, int plane)
+void intel_finish_page_flip(struct drm_i915_private *dev_priv, int pipe)
{
struct drm_device *dev = dev_priv->dev;
- struct intel_crtc *intel_crtc =
- to_intel_crtc(dev_priv->plane_to_crtc_mapping[plane]);
+ struct drm_crtc *crtc = dev_priv->pipe_to_crtc_mapping[pipe];
+ struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
+ struct intel_unpin_work *work;
unsigned long flags;
+ /* Ignore early vblank irqs */
+ if (!crtc)
+ 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) &&
+ page_flip_finished(intel_crtc))
+ page_flip_completed(intel_crtc);
+
spin_unlock_irqrestore(&dev->event_lock, flags);
}
@@ -10981,7 +10951,7 @@ static inline void intel_mark_page_flip_active(struct intel_unpin_work *work)
{
/* Ensure that the work item is consistent when activating it ... */
smp_mb__before_atomic();
- atomic_set(&work->pending, INTEL_FLIP_PENDING);
+ atomic_set(&work->pending, 1);
}
static int intel_gen2_queue_flip(struct drm_device *dev,
@@ -11421,8 +11391,8 @@ static bool __intel_pageflip_stall_check(struct drm_device *dev,
/* ensure that the unpin work is consistent wrt ->pending. */
smp_rmb();
- if (pending != INTEL_FLIP_PENDING)
- return pending == INTEL_FLIP_COMPLETE;
+ if (!pending)
+ 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 d3081aafac8d..e2d732af74bb 100644
--- a/drivers/gpu/drm/i915/intel_drv.h
+++ b/drivers/gpu/drm/i915/intel_drv.h
@@ -984,9 +984,6 @@ struct intel_unpin_work {
struct drm_i915_gem_object *pending_flip_obj;
struct drm_pending_vblank_event *event;
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;
@@ -1199,7 +1196,6 @@ 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_i915_private *dev_priv, int plane);
void intel_finish_page_flip(struct drm_i915_private *dev_priv, int pipe);
void intel_check_page_flip(struct drm_i915_private *dev_priv, int pipe);
int intel_prepare_plane_fb(struct drm_plane *plane,
--
2.5.5
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