disp: msm: dsi: disallow backlight update during panel mode switch

DSI controller and clock will be disabled/enabled during panel mode
switch, so disallow backlight update during panel mode switch to
avoiding DSI exception.

Change-Id: I37e2f3c9aa929555593ffb53950521150ee7698f
Signed-off-by: Lei Chen <chenlei@codeaurora.org>
Signed-off-by: Satya Rama Aditya Pinapala <psraditya30@codeaurora.org>

msm/dsi/dsi_drm.c

@@ -253,6 +253,7 @@ static void dsi_bridge_enable(struct drm_bridge *bridge)
 static void dsi_bridge_disable(struct drm_bridge *bridge)
 {
 	int rc = 0;
+	int private_flags;
 	struct dsi_display *display;
 	struct dsi_bridge *c_bridge = to_dsi_bridge(bridge);
 
@@ -261,18 +262,14 @@ static void dsi_bridge_disable(struct drm_bridge *bridge)
 		return;
 	}
 	display = c_bridge->display;
+	private_flags =
+		bridge->encoder->crtc->state->adjusted_mode.private_flags;
 
 	if (display && display->drm_conn) {
-		if (bridge->encoder->crtc->state->adjusted_mode.private_flags &
-			MSM_MODE_FLAG_SEAMLESS_POMS) {
-			display->poms_pending = true;
-			/* Disable ESD thread, during panel mode switch */
-			sde_connector_schedule_status_work(display->drm_conn,
-				false);
-		} else {
-			display->poms_pending = false;
-			sde_connector_helper_bridge_disable(display->drm_conn);
-		}
+		display->poms_pending =
+			private_flags & MSM_MODE_FLAG_SEAMLESS_POMS;
+
+		sde_connector_helper_bridge_disable(display->drm_conn);
 	}
 
 	rc = dsi_display_pre_disable(c_bridge->display);