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drm/amd/display: set MSA vsp/hsp to 0 for positive polarity for DP 128b/132b

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[why]
There is a bug in MSA programming sequence that mistakenly set
MSA vsp/hsp to 1 for positive polarity. This is incorrect.

Reviewed-by: Ariel Bernstein <Eric.Bernstein@amd.com>
Acked-by: Wayne Lin <wayne.lin@amd.com>
Signed-off-by: Wenjing Liu <wenjing.liu@amd.com>
Tested-by: Daniel Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Wenjing Liu 2021-11-02 12:43:47 -04:00 committed by Alex Deucher
parent fd3b2e21b8
commit ef9d5a54da
1 changed files with 2 additions and 2 deletions
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4
drivers/gpu/drm/amd/display/dc/dcn31/dcn31_hpo_dp_stream_encoder.c
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@ -358,8 +358,8 @@ static void dcn31_hpo_dp_stream_enc_set_stream_attribute(
h_width = hw_crtc_timing.h_border_left + hw_crtc_timing.h_addressable + hw_crtc_timing.h_border_right;
v_height = hw_crtc_timing.v_border_top + hw_crtc_timing.v_addressable + hw_crtc_timing.v_border_bottom;
hsp = hw_crtc_timing.flags.HSYNC_POSITIVE_POLARITY ? 0x80 : 0;
vsp = hw_crtc_timing.flags.VSYNC_POSITIVE_POLARITY ? 0x80 : 0;
hsp = hw_crtc_timing.flags.HSYNC_POSITIVE_POLARITY ? 0 : 0x80;
vsp = hw_crtc_timing.flags.VSYNC_POSITIVE_POLARITY ? 0 : 0x80;
v_freq = hw_crtc_timing.pix_clk_100hz * 100;
/* MSA Packet Mapping to 32-bit Link Symbols - DP2 spec, section 2.7.4.1