disp: msm: sde: handle another case for lost pp-done interrupt

Due to interrupt delays, sometimes the pp-done interrupt
for an in-between frame is lost, as with posted-start
frames are queued to the hardware before the completion
of the previous frame. Handle the lost pp-done interrupt
in the case where frame-n pp-done interrupt is missed
and frame-n+1 pp-done interrupt is processed before
frame-n+1 wr-ptr interrupt.

Change-Id: I36ec7ac494b2720fc005dab75047d2f4a5a2a699
Signed-off-by: Veera Sundaram Sankaran <[email protected]>

msm/sde/sde_encoder_phys_cmd.c

@@ -1345,10 +1345,11 @@ static int sde_encoder_phys_cmd_prepare_for_kickoff(
 	}
 	SDE_DEBUG_CMDENC(cmd_enc, "pp %d\n", phys_enc->hw_pp->idx - PINGPONG_0);
 
+	phys_enc->frame_trigger_mode = params->frame_trigger_mode;
 	SDE_EVT32(DRMID(phys_enc->parent), phys_enc->hw_pp->idx - PINGPONG_0,
 			atomic_read(&phys_enc->pending_kickoff_cnt),
-			atomic_read(&cmd_enc->autorefresh.kickoff_cnt));
-	phys_enc->frame_trigger_mode = params->frame_trigger_mode;
+			atomic_read(&cmd_enc->autorefresh.kickoff_cnt),
+			phys_enc->frame_trigger_mode);
 
 	if (phys_enc->frame_trigger_mode == FRAME_DONE_WAIT_DEFAULT) {
 		/*
@@ -1557,6 +1558,8 @@ static int sde_encoder_phys_cmd_wait_for_commit_done(
 	int rc = 0, i, pending_cnt;
 	struct sde_encoder_phys_cmd *cmd_enc;
 	ktime_t profile_timestamp = ktime_get();
+	u32 scheduler_status = INVALID_CTL_STATUS;
+	struct sde_hw_ctl *ctl;
 
 	if (!phys_enc)
 		return -EINVAL;
@@ -1582,11 +1585,17 @@ static int sde_encoder_phys_cmd_wait_for_commit_done(
 		if (cmd_enc->autorefresh.cfg.enable)
 			rc = _sde_encoder_phys_cmd_wait_for_autorefresh_done(
 								phys_enc);
+
+		ctl = phys_enc->hw_ctl;
+		if (ctl && ctl->ops.get_scheduler_status)
+			scheduler_status = ctl->ops.get_scheduler_status(ctl);
 	}
 
 	/* wait for posted start or serialize trigger */
-	if ((atomic_read(&phys_enc->pending_kickoff_cnt) > 1) ||
-	  (!rc && phys_enc->frame_trigger_mode == FRAME_DONE_WAIT_SERIALIZE))
+	pending_cnt = atomic_read(&phys_enc->pending_kickoff_cnt);
+	if ((pending_cnt > 1) ||
+	    (pending_cnt && (scheduler_status & BIT(0))) ||
+	    (!rc && phys_enc->frame_trigger_mode == FRAME_DONE_WAIT_SERIALIZE))
 		goto wait_for_idle;
 
 	return rc;
@@ -1601,7 +1610,8 @@ wait_for_idle:
 			phys_enc->hw_pp->idx - PINGPONG_0,
 			phys_enc->frame_trigger_mode,
 			atomic_read(&phys_enc->pending_kickoff_cnt),
-			phys_enc->enable_state, rc);
+			phys_enc->enable_state,
+			cmd_enc->wr_ptr_wait_success, scheduler_status, rc);
 		SDE_ERROR("pp:%d failed wait_for_idle: %d\n",
 				phys_enc->hw_pp->idx - PINGPONG_0, rc);
 		if (phys_enc->enable_state == SDE_ENC_ERR_NEEDS_HW_RESET)