disp: msm: sde: avoid backlight update in poms use case

Some panels need at least one frame to be transferred to GRAM
before enabling the backlight. This is done by delaying the
backlight update to these panels until the first frame commit
is completed. This feature is activated by setting the
"qcom,bl-update-flag = delay_until_first_frame" property in the
device tree. However, this feature adds delay in the POMS
(video 2 command) use case adversely. To address this additional
delay, avoid delaying the backlight for the POMS use case.

Change-Id: Ia25afd35f9fe4ffa7d56bddad2f0975a77f39fdf
Signed-off-by: Akash Gajjar <[email protected]>

msm/sde/sde_connector.c

@@ -1,6 +1,6 @@
 // SPDX-License-Identifier: GPL-2.0-only
 /*
- * Copyright (c) 2021-2023 Qualcomm Innovation Center, Inc. All rights reserved.
+ * Copyright (c) 2021-2024 Qualcomm Innovation Center, Inc. All rights reserved.
  * Copyright (c) 2016-2021, The Linux Foundation. All rights reserved.
  */
 
@@ -1181,7 +1181,7 @@ void sde_connector_helper_bridge_enable(struct drm_connector *connector)
 	 * So delay backlight update to these panels until the
 	 * first frame commit is received from the HW.
 	 */
-	if (display->panel->bl_config.bl_update ==
+	if (!display->poms_pending && display->panel->bl_config.bl_update ==
 				BL_UPDATE_DELAY_UNTIL_FIRST_FRAME)
 		sde_encoder_wait_for_event(c_conn->encoder,
 				MSM_ENC_TX_COMPLETE);