From: Fangzhi Zuo <Jerry.Zuo@xxxxxxx> VBIOS default clock value was halved, so the hardcoded dtb value should be halved as well. dtb clock should come from SMU eventually, but now dtb clock switching is not fully supported yet in SMU. Halve the dtb hardcoded value for now to have UHBR10 light up. Will rely on SMU for dtb clock switching once available. The w/a is for DCN32 only, DCN321 should adopt the original value. Signed-off-by: Fangzhi Zuo <Jerry.Zuo@xxxxxxx> Acked-by: Aurabindo Pillai <aurabindo.pillai@xxxxxxx> Signed-off-by: Alex Deucher <alexander.deucher@xxxxxxx> --- drivers/gpu/drm/amd/display/dc/clk_mgr/dcn32/dcn32_clk_mgr.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/gpu/drm/amd/display/dc/clk_mgr/dcn32/dcn32_clk_mgr.c b/drivers/gpu/drm/amd/display/dc/clk_mgr/dcn32/dcn32_clk_mgr.c index 9d2d2cda5543..774de29fa532 100644 --- a/drivers/gpu/drm/amd/display/dc/clk_mgr/dcn32/dcn32_clk_mgr.c +++ b/drivers/gpu/drm/amd/display/dc/clk_mgr/dcn32/dcn32_clk_mgr.c @@ -599,7 +599,7 @@ void dcn32_clk_mgr_construct( clk_mgr->dfs_ref_freq_khz = 100000; clk_mgr->base.dprefclk_khz = 717000; /* Changed as per DCN3.2_clock_frequency doc */ - clk_mgr->dccg->ref_dtbclk_khz = 477800; + clk_mgr->dccg->ref_dtbclk_khz = 268750; /* integer part is now VCO frequency in kHz */ clk_mgr->base.dentist_vco_freq_khz = 4300000;//dcn32_get_vco_frequency_from_reg(clk_mgr); -- 2.35.3
