disp: msm: sde: wait for specific pp_done instead of zero

2 Frames transfer pending is possible with posted start.
One ongoing frame and another triggered frame. Current SW
waits for pp_done interrupt if pending frame count is greater
than 1. It is possible that interrupt may be missed for ongoing
frame. In that case, SW should run pp_done wait for one by one
frame instead of two frames together. It allows encoder to
check the ctl scheduler status and trigger the frame done
event on time.

Change-Id: I4817842292d96747890ee70da8a5bdf9b56816ed
Signed-off-by: Dhaval Patel <pdhaval@codeaurora.org>

msm/sde/sde_encoder.c

@@ -408,13 +408,16 @@ static int _sde_encoder_wait_timeout(int32_t drm_id, int32_t hw_id,
 
 	do {
 		rc = wait_event_timeout(*(info->wq),
-			atomic_read(info->atomic_cnt) == 0, wait_time_jiffies);
+			atomic_read(info->atomic_cnt) == info->count_check,
+			wait_time_jiffies);
 		cur_ktime = ktime_get();
 
 		SDE_EVT32(drm_id, hw_id, rc, ktime_to_ms(cur_ktime),
-			timeout_ms, atomic_read(info->atomic_cnt));
+			timeout_ms, atomic_read(info->atomic_cnt),
+			info->count_check);
 	/* If we timed out, counter is valid and time is less, wait again */
-	} while (atomic_read(info->atomic_cnt) && (rc == 0) &&
+	} while ((atomic_read(info->atomic_cnt) != info->count_check) &&
+			(rc == 0) &&
 			(ktime_compare_safe(exp_ktime, cur_ktime) > 0));
 
 	return rc;