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drm/amd/display: Add Debugfs Entry to Force in SST Sequence

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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>
This commit is contained in:
Fangzhi Zuo 2021-12-07 13:47:51 -05:00 committed by Alex Deucher
parent 3c02193102
commit 7e4aeed859
1 changed files with 30 additions and 0 deletions
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30
drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_debugfs.c
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@ -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);