drm/amd/display: Adjust dprefclk by down spread percentage.

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[Why]
OLED panels show no display for large vtotal timings.

[How]
Check if ss is enabled and read from lut for spread spectrum percentage.
Adjust dprefclk as required. DP_DTO adjustment is for edp only.

Cc: stable@vger.kernel.org
Reviewed-by: Nicholas Kazlauskas <nicholas.kazlauskas@amd.com>
Acked-by: Hamza Mahfooz <hamza.mahfooz@amd.com>
Signed-off-by: Zhongwei <zhongwei.zhang@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

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Zhongwei 2024-03-27 13:49:40 +08:00 • committed by Alex Deucher

parent c3e2a5f2da

commit e047dd448d

2 changed files with 54 additions and 4 deletions

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50

drivers/gpu/drm/amd/display/dc/clk_mgr/dcn35/dcn35_clk_mgr.c

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8

drivers/gpu/drm/amd/display/dc/dce/dce_clock_source.c

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