Commit 014427ad authored by Sherry's avatar Sherry Committed by Alex Deucher
Browse files

drm/amd/display: change hw sequence 



[Why]
t9 delay func is called twice after setting power off, the unexpected
action results in a doubling of the added 140ms t9 delay

[How]
If the backlight has been turned off, does not turn it off again

Signed-off-by: default avatarSherry <Yao.Wang1@amd.com>
Reviewed-by: default avatarTony Cheng <Tony.Cheng@amd.com>
Acked-by: default avatarRodrigo Siqueira <Rodrigo.Siqueira@amd.com>
Signed-off-by: default avatarAlex Deucher <alexander.deucher@amd.com>
parent 2208f39c

drivers/gpu/drm/amd/display/dc/dce110/dce110_hw_sequencer.c

+8 −5
Original line number Diff line number Diff line
@@ -939,13 +939,16 @@ void dce110_edp_backlight_control( 
		return;

	}



	if (enable && link->panel_cntl &&

		link->panel_cntl->funcs->is_panel_backlight_on(link->panel_cntl)) {

	if (link->panel_cntl) {

		bool is_backlight_on = link->panel_cntl->funcs->is_panel_backlight_on(link->panel_cntl);



		if ((enable && is_backlight_on) || (!enable && !is_backlight_on)) {

			DC_LOG_HW_RESUME_S3(

				"%s: panel already powered up. Do nothing.\n",

				"%s: panel already powered up/off. Do nothing.\n",

				__func__);

			return;

		}

	}



	/* Send VBIOS command to control eDP panel backlight */