Commit 7e4aeed8 authored by Fangzhi Zuo's avatar Fangzhi Zuo Committed by Alex Deucher
Browse files

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: default avatarFangzhi Zuo <Jerry.Zuo@amd.com>
Reviewed-by: default avatarAurabindo Pillai <aurabindo.pillai@amd.com>
Signed-off-by: default avatarAlex Deucher <alexander.deucher@amd.com>
parent 3c021931

drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_debugfs.c

+30 −0
Original line number Diff line number Diff line
@@ -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);