From: Alex Deucher Date: Tue, 16 Feb 2021 17:22:40 +0000 (-0500) Subject: drm/amdgpu/display: restore AUX_DPHY_TX_CONTROL for DCN2.x X-Git-Tag: accepted/tizen/unified/20230118.172025~7243^2~10^2~176 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=eec64a5e5d07e6e66a0c7255b4324183ed57df1a;p=platform%2Fkernel%2Flinux-rpi.git drm/amdgpu/display: restore AUX_DPHY_TX_CONTROL for DCN2.x Commit 098214999c8f added fetching of the AUX_DPHY register values from the vbios, but it also changed the default values in the case when there are no values in the vbios. This causes problems with displays with high refresh rates. To fix this, switch back to the original default value for AUX_DPHY_TX_CONTROL. Fixes: 098214999c8f ("drm/amd/display: Read VBIOS Golden Settings Tbl") Bug: https://gitlab.freedesktop.org/drm/amd/-/issues/1426 Reviewed-by: Harry Wentland Signed-off-by: Alex Deucher Cc: Igor Kravchenko Cc: Aric Cyr Cc: Aurabindo Pillai --- diff --git a/drivers/gpu/drm/amd/display/dc/dcn20/dcn20_link_encoder.c b/drivers/gpu/drm/amd/display/dc/dcn20/dcn20_link_encoder.c index fa01349..2f9bfae 100644 --- a/drivers/gpu/drm/amd/display/dc/dcn20/dcn20_link_encoder.c +++ b/drivers/gpu/drm/amd/display/dc/dcn20/dcn20_link_encoder.c @@ -341,8 +341,7 @@ void enc2_hw_init(struct link_encoder *enc) } else { AUX_REG_WRITE(AUX_DPHY_RX_CONTROL0, 0x103d1110); - AUX_REG_WRITE(AUX_DPHY_TX_CONTROL, 0x21c4d); - + AUX_REG_WRITE(AUX_DPHY_TX_CONTROL, 0x21c7a); } //AUX_DPHY_TX_REF_CONTROL'AUX_TX_REF_DIV HW default is 0x32;