From: Sean Paul <seanpaul@xxxxxxxxxxxx>
In the case of an async/cursor update, we don't wait for the frame_done
event, which means handle_frame_done is never called, and the frame_done
watchdog isn't canceled. Currently, this results in a frame_done timeout
every time the cursor moves without a synchronous frame following it up
before the timeout expires. Since we don't wait for frame_done, and
don't handle it, we shouldn't modify the watchdog.
Signed-off-by: Sean Paul <seanpaul@xxxxxxxxxxxx>
---
drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c | 19 +++++++++++++------
1 file changed, 13 insertions(+), 6 deletions(-)
diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c b/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c
index 51e46b206c73e..05145cf9fb408 100644
--- a/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c
+++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c
@@ -1794,7 +1794,6 @@ void dpu_encoder_kickoff(struct drm_encoder *drm_enc, bool async)
{
struct dpu_encoder_virt *dpu_enc;
struct dpu_encoder_phys *phys;
- unsigned long timeout_ms;
ktime_t wakeup_time;
unsigned int i;
@@ -1807,12 +1806,20 @@ void dpu_encoder_kickoff(struct drm_encoder *drm_enc, bool async)
trace_dpu_enc_kickoff(DRMID(drm_enc));
- timeout_ms = DPU_ENCODER_FRAME_DONE_TIMEOUT_FRAMES * 1000 /
- drm_mode_vrefresh(&drm_enc->crtc->state->adjusted_mode);
+ /*
+ * Asynchronous frames don't handle FRAME_DONE events. As such, they
+ * shouldn't enable the frame_done watchdog since it will always time
+ * out.
+ */
+ if (!async) {
+ unsigned long timeout_ms;
+ timeout_ms = DPU_ENCODER_FRAME_DONE_TIMEOUT_FRAMES * 1000 /
+ drm_mode_vrefresh(&drm_enc->crtc->state->adjusted_mode);
- atomic_set(&dpu_enc->frame_done_timeout_ms, timeout_ms);
- mod_timer(&dpu_enc->frame_done_timer,
- jiffies + msecs_to_jiffies(timeout_ms));
+ atomic_set(&dpu_enc->frame_done_timeout_ms, timeout_ms);
+ mod_timer(&dpu_enc->frame_done_timer,
+ jiffies + msecs_to_jiffies(timeout_ms));
+ }
/* All phys encs are ready to go, trigger the kickoff */
_dpu_encoder_kickoff_phys(dpu_enc, async);
--
Sean Paul, Software Engineer, Google / Chromium OS
