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| author | Fangzhi Zuo <Jerry.Zuo@amd.com> | 2021-12-07 13:47:51 -0500 |
|---|---|---|
| committer | Alex Deucher <alexander.deucher@amd.com> | 2021-12-13 16:32:34 -0500 |
| commit | 7e4aeed859d47474e40f43ef6ef3004ab52486be (patch) | |
| tree | 93dd7d4d8b3ac036c8d7e76ade8a9cd11dd267fe /drivers | |
| parent | 3c021931023a30316db415044531b116b85e6ebd (diff) | |
| download | linux-7e4aeed859d47474e40f43ef6ef3004ab52486be.tar.bz2 | |
drm/amd/display: Add Debugfs Entry to Force in SST Sequence
It is to force SST sequence on MST capable receivers.
v2: squash in compilation fix when CONFIG_DRM_AMD_DC_DCN is not set
Signed-off-by: Fangzhi Zuo <Jerry.Zuo@amd.com>
Reviewed-by: Aurabindo Pillai <aurabindo.pillai@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_debugfs.c | 30 |
1 files changed, 30 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 31c05eb5c64a..dc55a736e198 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 @@ -3237,6 +3237,32 @@ static int disable_hpd_get(void *data, u64 *val) DEFINE_DEBUGFS_ATTRIBUTE(disable_hpd_ops, disable_hpd_get, disable_hpd_set, "%llu\n"); +#if defined(CONFIG_DRM_AMD_DC_DCN) +/* + * Temporary w/a to force sst sequence in M42D DP2 mst receiver + * Example usage: echo 1 > /sys/kernel/debug/dri/0/amdgpu_dm_dp_set_mst_en_for_sst + */ +static int dp_force_sst_set(void *data, u64 val) +{ + struct amdgpu_device *adev = data; + + adev->dm.dc->debug.set_mst_en_for_sst = val; + + return 0; +} + +static int dp_force_sst_get(void *data, u64 *val) +{ + struct amdgpu_device *adev = data; + + *val = adev->dm.dc->debug.set_mst_en_for_sst; + + return 0; +} +DEFINE_DEBUGFS_ATTRIBUTE(dp_set_mst_en_for_sst_ops, dp_force_sst_get, + dp_force_sst_set, "%llu\n"); +#endif + /* * Sets the DC visual confirm debug option from the given string. * Example usage: echo 1 > /sys/kernel/debug/dri/0/amdgpu_visual_confirm @@ -3346,6 +3372,10 @@ void dtn_debugfs_init(struct amdgpu_device *adev) adev, &mst_topo_fops); debugfs_create_file("amdgpu_dm_dtn_log", 0644, root, adev, &dtn_log_fops); +#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); +#endif debugfs_create_file_unsafe("amdgpu_dm_visual_confirm", 0644, root, adev, &visual_confirm_fops); |