Commit ad787771 authored by Zhan Liu's avatar Zhan Liu Committed by Alex Deucher
Browse files

drm/amd/display: keep eDP Vdd on when eDP stream is already enabled 



[Why]
Even if can_apply_edp_fast_boot is set to 1 at boot, this flag will
be cleared to 0 at S3 resume.

[How]
Keep eDP Vdd on when eDP stream is already enabled.

Reviewed-by: default avatarCharlene Liu <Charlene.Liu@amd.com>
Acked-by: default avatarJasdeep Dhillon <jdhillon@amd.com>
Signed-off-by: default avatarZhan Liu <Zhan.Liu@amd.com>
Tested-by: default avatarDaniel Wheeler <daniel.wheeler@amd.com>
Signed-off-by: default avatarAlex Deucher <alexander.deucher@amd.com>
parent 60fdf98a

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

+22 −2
Original line number Diff line number Diff line
@@ -1834,9 +1834,29 @@ void dce110_enable_accelerated_mode(struct dc *dc, struct dc_state *context) 
				break;

			}

		}

		// We are trying to enable eDP, don't power down VDD

		if (can_apply_edp_fast_boot)



		/*

		 * TO-DO: So far the code logic below only addresses single eDP case.

		 * For dual eDP case, there are a few things that need to be

		 * implemented first:

		 *

		 * 1. Change the fastboot logic above, so eDP link[0 or 1]'s

		 * stream[0 or 1] will all be checked.

		 *

		 * 2. Change keep_edp_vdd_on to an array, and maintain keep_edp_vdd_on

		 * for each eDP.

		 *

		 * Once above 2 things are completed, we can then change the logic below

		 * correspondingly, so dual eDP case will be fully covered.

		 */



		// We are trying to enable eDP, don't power down VDD if eDP stream is existing

		if ((edp_stream_num == 1 && edp_streams[0] != NULL) || can_apply_edp_fast_boot) {

			keep_edp_vdd_on = true;

			DC_LOG_EVENT_LINK_TRAINING("Keep eDP Vdd on\n");

		} else {

			DC_LOG_EVENT_LINK_TRAINING("No eDP stream enabled, turn eDP Vdd off\n");

		}

	}



	// Check seamless boot support