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drm/amd/display: Fix eDP will flash when boot to OS

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[WHY]
With eDP DSC enabled and set 4K 60Hz, there would be screen
corruption when booting to OS or enabling the driver.

[HOW]
Avoid powering down VDD when we cannot apply eDP fast boot.

Reviewed-by: Nicholas Kazlauskas <Nicholas.Kazlauskas@amd.com>
Acked-by: Wayne Lin <wayne.lin@amd.com>
Signed-off-by: Brandon Syu <Brandon.Syu@amd.com>
Tested-by: Daniel Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Brandon Syu 2021-11-03 12:11:28 +08:00 • committed by Alex Deucher
parent 2665f63a73
commit 189789a15f
2 changed files with 5 additions and 2 deletions
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5
drivers/gpu/drm/amd/display/dc/core/dc_link_dp.c
View file

@ -6045,7 +6045,10 @@ bool is_edp_ilr_optimization_required(struct dc_link *link, struct dc_crtc_timin
req_bw = dc_bandwidth_in_kbps_from_timing(crtc_timing);
decide_edp_link_settings(link, &link_setting, req_bw);
if (!crtc_timing->flags.DSC)
decide_edp_link_settings(link, &link_setting, req_bw);
else
decide_edp_link_settings_with_dsc(link, &link_setting, req_bw, LINK_RATE_UNKNOWN);
if (link->dpcd_caps.edp_supported_link_rates[link_rate_set] != link_setting.link_rate ||
lane_count_set.bits.LANE_COUNT_SET != link_setting.lane_count) {

2
drivers/gpu/drm/amd/display/dc/dce110/dce110_hw_sequencer.c
View file

@ -1833,7 +1833,7 @@ void dce110_enable_accelerated_mode(struct dc *dc, struct dc_state *context)
}
}
// We are trying to enable eDP, don't power down VDD
if (edp_stream_num)
if (edp_stream_num && can_apply_edp_fast_boot)
keep_edp_vdd_on = true;
}