disp: msm: dsi: Remove backlight operation during poms process

During POMS process, from vid to cmd or from cmd to vid, we both
see black screen, this is caused by backlight operation. Logically
display driver should not operate on backlight during POMS process.

Change-Id: I3bc76d6ed9ccee50f740c36cb276b6b103e7d43e
Signed-off-by: Yu Wu <[email protected]>

msm/sde/sde_connector.c

@@ -1112,7 +1112,7 @@ void sde_connector_helper_bridge_disable(struct drm_connector *connector)
 	/* Disable ESD thread */
 	sde_connector_schedule_status_work(connector, false);
 
-	if (!sde_in_trusted_vm(sde_kms) && c_conn->bl_device) {
+	if (!sde_in_trusted_vm(sde_kms) && c_conn->bl_device && !poms_pending) {
 		c_conn->bl_device->props.power = FB_BLANK_POWERDOWN;
 		c_conn->bl_device->props.state |= BL_CORE_FBBLANK;
 		backlight_update_status(c_conn->bl_device);
@@ -1156,7 +1156,7 @@ void sde_connector_helper_bridge_enable(struct drm_connector *connector)
 				MSM_ENC_TX_COMPLETE);
 	c_conn->allow_bl_update = true;
 
-	if (!sde_in_trusted_vm(sde_kms) && c_conn->bl_device) {
+	if (!sde_in_trusted_vm(sde_kms) && c_conn->bl_device && !display->poms_pending) {
 		c_conn->bl_device->props.power = FB_BLANK_UNBLANK;
 		c_conn->bl_device->props.state &= ~BL_CORE_FBBLANK;
 		backlight_update_status(c_conn->bl_device);