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| author |   Lewis Huang <Lewis.Huang@amd.com> | 2019-09-05 15:33:58 +0800 |
|---|---|---|
| committer |   Alex Deucher <alexander.deucher@amd.com> | 2019-10-10 19:32:03 -0500 |
| commit | f537d474df15393ad25721f5203ce16ed3596d66 (patch) | |
| tree | 3ea2943d295e52b149889bdc9ff0b5c619fbc27c /drivers/gpu/drm/amd/display/dc/dcn10/dcn10_link_encoder.h | |
| parent | drm/amd/display: build up VSIF infopacket (diff) | |
| download | linux-dev-f537d474df15393ad25721f5203ce16ed3596d66.tar.xz linux-dev-f537d474df15393ad25721f5203ce16ed3596d66.zip | |
drm/amd/display: check phy dpalt lane count config
[Why]
Type-c PHY config is not align with dpcd lane count.
When those values didn't match, it cause driver do
link training with 4 lane but phy only can output 2 lane.
The link trainig always fail.
[How]
1. Modify get_max_link_cap function. According DPALT_DP4
to update max lane count.
2. Add dp_mst_verify_link_cap to handle MST case because
we didn't call dp_mst_verify_link_cap for MST case.
Signed-off-by: Lewis Huang <Lewis.Huang@amd.com>
Reviewed-by: Wenjing Liu <Wenjing.Liu@amd.com>
Acked-by: Bhawanpreet Lakha <Bhawanpreet.Lakha@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Diffstat (limited to 'drivers/gpu/drm/amd/display/dc/dcn10/dcn10_link_encoder.h')
| -rw-r--r-- | drivers/gpu/drm/amd/display/dc/dcn10/dcn10_link_encoder.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/drivers/gpu/drm/amd/display/dc/dcn10/dcn10_link_encoder.h b/drivers/gpu/drm/amd/display/dc/dcn10/dcn10_link_encoder.h index 8bf5f0f2301d..0c12395cfa36 100644 --- a/drivers/gpu/drm/amd/display/dc/dcn10/dcn10_link_encoder.h +++ b/drivers/gpu/drm/amd/display/dc/dcn10/dcn10_link_encoder.h @@ -337,6 +337,7 @@ struct dcn10_link_enc_registers { type RDPCS_TX_FIFO_ERROR_MASK;\ type RDPCS_DPALT_DISABLE_TOGGLE_MASK;\ type RDPCS_DPALT_4LANE_TOGGLE_MASK;\ + type RDPCS_PHY_DPALT_DP4;\ type RDPCS_PHY_DPALT_DISABLE;\ type RDPCS_PHY_DPALT_DISABLE_ACK;\ type RDPCS_PHY_DP_MPLLB_V2I;\ |