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| author | Hugo Hu <hugo.hu@amd.com> | 2019-02-25 19:16:52 +0800 |
|---|---|---|
| committer | Alex Deucher <alexander.deucher@amd.com> | 2019-03-27 22:41:32 -0500 |
| commit | a504ad265dec380d7314b8e02984c8d294ab0bd5 (patch) | |
| tree | 00862914b9452f134581db4928085c2473e8c875 /drivers/gpu/drm/amd/amdgpu/amdgpu_gem.c | |
| parent | 3ae42acde349e0f983945da5901282de9352d929 (diff) | |
drm/amd/display: Handle branch device with DFP count = 0 case.
[Why]
When you have a SST branch device the driver, Even no sink device connected,
it also send HPD with a valid EDID. Driver will config it to DP sink.
Therefore, there're two displays in display setting.
DPCD 0x05, DFP_PRESENT = 1 (branch device),
DFP_TYPE = 00 (Display Port)
[How]
Driver determine DPCD 0x05 DFP_PRESENT = 1(branch) as an active dongle
And check DFP count.
Signed-off-by: Hugo Hu <hugo.hu@amd.com>
Reviewed-by: Hugo Hu <Hugo.Hu@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/amdgpu/amdgpu_gem.c')
0 files changed, 0 insertions, 0 deletions