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disp: msm: sde: update encoder wait event timeout condition

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The sequence during which issue is observed:

1) wb pending_retire_fence_cnt is equal to 2 due to which
it waits for WB_DONE irq. Current pending_retire_fence_cnt
is 2 and required pending_retire_fence_cnt is 1.

2) Due to external reasons, irq's are disabled and after
some duration, back to back irq's are received.

3) Because of this, pending_retire_fence_cnt becomes zero
before the commit thread could wakeup and validate the
condition.

sde_encoder_helper_wait_for_irq API will wait for complete
timeout due to the count mismatch. This change adds
required check to early exit in such usecases.

Change-Id: I4f9c817cc7acee17424b77928d34b039afcaeae5
Signed-off-by: Yashwanth <quic_yvulapu@quicinc.com>
This commit is contained in:
Yashwanth
2022-03-22 10:49:36 +05:30
committed by Gerrit - the friendly Code Review server
parent 7b00783abe
commit a5e9316dd1
1 changed files with 9 additions and 0 deletions
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9
msm/sde/sde_encoder.c
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@@ -352,6 +352,7 @@ static int _sde_encoder_wait_timeout(int32_t drm_id, int32_t hw_id,
s64 wait_time_jiffies = msecs_to_jiffies(timeout_ms);
ktime_t cur_ktime;
ktime_t exp_ktime = ktime_add_ms(ktime_get(), timeout_ms);
u32 curr_atomic_cnt = atomic_read(info->atomic_cnt);
do {
rc = wait_event_timeout(*(info->wq),
@@ -362,6 +363,14 @@ static int _sde_encoder_wait_timeout(int32_t drm_id, int32_t hw_id,
SDE_EVT32(drm_id, hw_id, rc, ktime_to_ms(cur_ktime),
timeout_ms, atomic_read(info->atomic_cnt),
info->count_check);
/* Make an early exit if the condition is already satisfied */
if ((atomic_read(info->atomic_cnt) < info->count_check) &&
(info->count_check < curr_atomic_cnt)) {
rc = true;
break;
}
/* If we timed out, counter is valid and time is less, wait again */
} while ((atomic_read(info->atomic_cnt) != info->count_check) &&
(rc == 0) &&