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| author |   Fangzhi Zuo <Jerry.Zuo@amd.com> | 2022-01-28 22:04:10 +0800 |
|---|---|---|
| committer |   Alex Deucher <alexander.deucher@amd.com> | 2022-02-02 18:26:32 -0500 |
| commit | bd682a788c1f4fbefe17b3ee9e0e3debdefeec6d (patch) | |
| tree | a32a0376fa453301b728cbb51ff5c3ca79008f8c /drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_debugfs.c | |
| parent | drm/amd/display: 3.2.171 (diff) | |
| download | wireguard-linux-bd682a788c1f4fbefe17b3ee9e0e3debdefeec6d.tar.xz wireguard-linux-bd682a788c1f4fbefe17b3ee9e0e3debdefeec6d.zip | |
drm/amd/display: Trigger DP2 Sequence With Uncertified Cable
DP2 sequence is triggered only if VESA certified cable is detected.
Force DP2 sequence with uncertified cable for testing purpose.
Tested-by: Daniel Wheeler <daniel.wheeler@amd.com>
Reviewed-by: Wenjing Liu <Wenjing.Liu@amd.com>
Acked-by: Stylon Wang <stylon.wang@amd.com>
Signed-off-by: Fangzhi Zuo <Jerry.Zuo@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Diffstat (limited to 'drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_debugfs.c')
| -rw-r--r-- | drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_debugfs.c | 26 |
1 files changed, 26 insertions, 0 deletions
diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_debugfs.c b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_debugfs.c index aca725874bcf..bdea177fae55 100644 --- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_debugfs.c +++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_debugfs.c @@ -3431,6 +3431,30 @@ static int dp_force_sst_get(void *data, u64 *val) } DEFINE_DEBUGFS_ATTRIBUTE(dp_set_mst_en_for_sst_ops, dp_force_sst_get, dp_force_sst_set, "%llu\n"); + +/* + * Force DP2 sequence without VESA certified cable. + * Example usage: echo 1 > /sys/kernel/debug/dri/0/amdgpu_dm_dp_ignore_cable_id + */ +static int dp_ignore_cable_id_set(void *data, u64 val) +{ + struct amdgpu_device *adev = data; + + adev->dm.dc->debug.ignore_cable_id = val; + + return 0; +} + +static int dp_ignore_cable_id_get(void *data, u64 *val) +{ + struct amdgpu_device *adev = data; + + *val = adev->dm.dc->debug.ignore_cable_id; + + return 0; +} +DEFINE_DEBUGFS_ATTRIBUTE(dp_ignore_cable_id_ops, dp_ignore_cable_id_get, + dp_ignore_cable_id_set, "%llu\n"); #endif /* @@ -3549,6 +3573,8 @@ void dtn_debugfs_init(struct amdgpu_device *adev) #if defined(CONFIG_DRM_AMD_DC_DCN) debugfs_create_file("amdgpu_dm_dp_set_mst_en_for_sst", 0644, root, adev, &dp_set_mst_en_for_sst_ops); + debugfs_create_file("amdgpu_dm_dp_ignore_cable_id", 0644, root, adev, + &dp_ignore_cable_id_ops); #endif debugfs_create_file_unsafe("amdgpu_dm_visual_confirm", 0644, root, adev, |