linux/drivers/gpu/drm/amd
Hugo Hu a504ad265d 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>
2019-03-27 22:41:32 -05:00
..
acp drm/amdgpu: Remove wrapper layer of cgs irq handling 2018-03-21 14:36:58 -05:00
amdgpu drm/amdgpu: don't put the root PD into the relocated list 2019-03-27 22:41:04 -05:00
amdkfd drm/amdkfd: add RAS ECC event support (v3) 2019-03-19 15:36:51 -05:00
display drm/amd/display: Handle branch device with DFP count = 0 case. 2019-03-27 22:41:32 -05:00
include drm/amdgpu: remove chash 2019-03-19 15:36:58 -05:00
powerplay drm/amd/powerplay: Fix double unlock bug in smu_sys_set_pp_table() 2019-03-21 14:05:26 -05:00