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

[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.

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>

diff --git a/drivers/gpu/drm/amd/display/dc/dce/dce_clk_mgr.c b/drivers/gpu/drm/amd/display/dc/dce/dce_clk_mgr.c
index 56f598567f0bdd2fb97e8505319855e5522f0756..bd22f51813bf195fc58094584493ff440d863fd7 100644 (file)
--- a/drivers/gpu/drm/amd/display/dc/dce/dce_clk_mgr.c
+++ b/drivers/gpu/drm/amd/display/dc/dce/dce_clk_mgr.c
@@ -591,6 +591,8 @@ static void dce11_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;