disp: msm: sde: avoid idle pc during ESD recovery

This change prevents entering into idle pc during ESD
recovery. In the event of a panel dead scenario, the panel
TE is no longer valid until display is enabled again. Until
the time display is enabled, idle pc will be blocked so
that display does not fall into then exit idle pc and
attempt to set the vsync source to this invalid panel TE.

Change-Id: Ibdc71b803d50923832f08b238a96aa28854aaea0
Signed-off-by: Samantha Tran <samtran@codeaurora.org>

msm/sde/sde_encoder.c

@@ -2074,23 +2074,27 @@ static int _sde_encoder_rc_idle(struct drm_encoder *drm_enc,
 	struct sde_kms *sde_kms;
 	struct drm_crtc *crtc = drm_enc->crtc;
 	struct sde_crtc *sde_crtc = to_sde_crtc(crtc);
+	struct sde_connector *sde_conn;
 
 	priv = drm_enc->dev->dev_private;
 	sde_kms = to_sde_kms(priv->kms);
+	sde_conn = to_sde_connector(sde_enc->cur_master->connector);
 
 	mutex_lock(&sde_enc->rc_lock);
 
-	if (sde_enc->rc_state != SDE_ENC_RC_STATE_ON) {
+	if (sde_conn->panel_dead) {
+		SDE_DEBUG_ENC(sde_enc, "skip idle. Panel in dead state\n");
+		SDE_EVT32(DRMID(drm_enc), sw_event, sde_enc->rc_state, SDE_EVTLOG_ERROR);
+		goto end;
+	} else if (sde_enc->rc_state != SDE_ENC_RC_STATE_ON) {
 		SDE_DEBUG_ENC(sde_enc, "sw_event:%d, rc:%d !ON state\n",
 				sw_event, sde_enc->rc_state);
-		SDE_EVT32(DRMID(drm_enc), sw_event, sde_enc->rc_state,
-				SDE_EVTLOG_ERROR);
+		SDE_EVT32(DRMID(drm_enc), sw_event, sde_enc->rc_state, SDE_EVTLOG_ERROR);
 		goto end;
 	} else if (sde_crtc_frame_pending(sde_enc->crtc)) {
 		SDE_DEBUG_ENC(sde_enc, "skip idle entry");
 		SDE_EVT32(DRMID(drm_enc), sw_event, sde_enc->rc_state,
-			sde_crtc_frame_pending(sde_enc->crtc),
-			SDE_EVTLOG_ERROR);
+			sde_crtc_frame_pending(sde_enc->crtc), SDE_EVTLOG_ERROR);
 		_sde_encoder_rc_kickoff_delayed(sde_enc, sw_event);
 		goto end;
 	}