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drm/msm: dpu: Simplify frame_done watchdog timeout calculation

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Instead of setting the timeout and then immediately reading it back
(along with the hand-rolled msecs_to_jiffies calculation), just
calculate it once and set it in both places at the same time.

Reviewed-by: Abhinav Kumar <abhinavk@codeaurora.org>
Signed-off-by: Sean Paul <seanpaul@chromium.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20190128204306.95076-2-sean@poorly.run

Signed-off-by: Rob Clark <robdclark@chromium.org>
This commit is contained in:
Sean Paul 2019-01-28 15:42:49 -05:00 committed by Rob Clark
parent 6117f86202
commit 2e0391865b
1 changed files with 7 additions and 5 deletions
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12
drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c
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@ -1788,6 +1788,7 @@ 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;
@ -1800,11 +1801,12 @@ void dpu_encoder_kickoff(struct drm_encoder *drm_enc, bool async)
trace_dpu_enc_kickoff(DRMID(drm_enc));
atomic_set(&dpu_enc->frame_done_timeout,
DPU_FRAME_DONE_TIMEOUT * 1000 /
drm_mode_vrefresh(&drm_enc->crtc->state->adjusted_mode));
mod_timer(&dpu_enc->frame_done_timer, jiffies +
((atomic_read(&dpu_enc->frame_done_timeout) * HZ) / 1000));
timeout_ms = DPU_FRAME_DONE_TIMEOUT * 1000 /
drm_mode_vrefresh(&drm_enc->crtc->state->adjusted_mode);
atomic_set(&dpu_enc->frame_done_timeout, 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);