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

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[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: Charlene Liu <Charlene.Liu@amd.com>
Acked-by: Jasdeep Dhillon <jdhillon@amd.com>
Signed-off-by: Zhan Liu <Zhan.Liu@amd.com>
Tested-by: Daniel Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Zhan Liu 2022-01-27 22:08:53 -05:00 committed by Alex Deucher
parent 60fdf98a77
commit ad787771b4
1 changed files with 22 additions and 2 deletions
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24
drivers/gpu/drm/amd/display/dc/dce110/dce110_hw_sequencer.c
View File

@ -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