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drm/amd/display: Enable Freesync over PCon

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[why]
Enable Freesync over PCon on Linux environment.

[how]
Adding Freesync over PCon support in amdgpu_dm
- Read DPCD for Freesync over PCon capabilitiy
- Add whitelist for compatible branch devices

Reviewed-by: Chao-kai Wang <Stylon.Wang@amd.com>
Acked-by: Alex Hung <alex.hung@amd.com>
Signed-off-by: Sung Joon Kim <sungkim@amd.com>
Tested-by: Daniel Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Sung Joon Kim
2023-01-12 10:38:10 -05:00
committed by Alex Deucher
parent 634d0aa54e
commit 5b49da02dd
7 changed files with 118 additions and 37 deletions
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drivers/gpu/drm/amd/display/include/ddc_service_types.h
+1
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@@ -35,6 +35,7 @@
#define DP_BRANCH_DEVICE_ID_00E04C 0x00E04C
#define DP_BRANCH_DEVICE_ID_006037 0x006037
#define DP_BRANCH_DEVICE_ID_001CF8 0x001CF8
#define DP_BRANCH_DEVICE_ID_0060AD 0x0060AD
#define DP_BRANCH_HW_REV_10 0x10
#define DP_BRANCH_HW_REV_20 0x20