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drm/amd/display: Fix 6x4K displays light-up on Vega20 (v2)

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[ Upstream commit c6888879fd ]

[Why]
More than 4x4K didn't lightup on Vega20 due to low dcfclk value.
Powerplay expects valid min requirement for dcfclk from DC.

[How]
Update min_dcfclock_khz based on min_engine_clock value.

v2: backport to 4.20 (Alex)

Reviewed-by: Hersen Wu <hersenxs.wu@amd.com>
Reviewed-by: Feifei Xu <Feifei.Xu@amd.com>
Reviewed-by: Evan Quan <evan.quan@amd.com>
Acked-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Roman Li <Roman.Li@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Roman Li
2018-11-27 17:16:37 -05:00
committed by Greg Kroah-Hartman
parent bdf7c4c84b
commit 3965b4f0c3
1 changed files with 2 additions and 0 deletions
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2
drivers/gpu/drm/amd/display/dc/dce110/dce110_hw_sequencer.c
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@@ -2530,6 +2530,8 @@ static void pplib_apply_display_requirements(
dc,
context->bw.dce.sclk_khz);
pp_display_cfg->min_dcfclock_khz = pp_display_cfg->min_engine_clock_khz;
pp_display_cfg->min_engine_clock_deep_sleep_khz
= context->bw.dce.sclk_deep_sleep_khz;