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drm/amd/display: expose skip_detection_link_training to debugfs

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[Why] within dc link detecion, dp link training will be
executed for external sst dp. for debug purpose, we may
need skip dp link training.

[How] expose dc debug option to skip_detection_link_training
to debugfs

Reviewed-by: Roman Li <Roman.Li@amd.com>
Acked-by: Pavle Kotarac <Pavle.Kotarac@amd.com>
Signed-off-by: hersen wu <hersenxs.wu@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
hersen wu 2022-04-01 15:25:41 -04:00 committed by Alex Deucher
parent 3b69632c85
commit 634c67ee33
1 changed files with 37 additions and 0 deletions
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37
drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_debugfs.c
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@ -3491,6 +3491,40 @@ DEFINE_SHOW_ATTRIBUTE(mst_topo);
DEFINE_DEBUGFS_ATTRIBUTE(visual_confirm_fops, visual_confirm_get,
visual_confirm_set, "%llu\n");
/*
* Sets the DC skip_detection_link_training debug option from the given string.
* Example usage: echo 1 > /sys/kernel/debug/dri/0/amdgpu_skip_detection_link_training
*/
static int skip_detection_link_training_set(void *data, u64 val)
{
struct amdgpu_device *adev = data;
if (val == 0)
adev->dm.dc->debug.skip_detection_link_training = false;
else
adev->dm.dc->debug.skip_detection_link_training = true;
return 0;
}
/*
* Reads the DC skip_detection_link_training debug option value into the given buffer.
* Example usage: cat /sys/kernel/debug/dri/0/amdgpu_dm_skip_detection_link_training
*/
static int skip_detection_link_training_get(void *data, u64 *val)
{
struct amdgpu_device *adev = data;
*val = adev->dm.dc->debug.skip_detection_link_training;
return 0;
}
DEFINE_DEBUGFS_ATTRIBUTE(skip_detection_link_training_fops,
skip_detection_link_training_get,
skip_detection_link_training_set, "%llu\n");
/*
* Dumps the DCC_EN bit for each pipe.
* Example usage: cat /sys/kernel/debug/dri/0/amdgpu_dm_dcc_en
@ -3584,6 +3618,9 @@ void dtn_debugfs_init(struct amdgpu_device *adev)
debugfs_create_file_unsafe("amdgpu_dm_visual_confirm", 0644, root, adev,
&visual_confirm_fops);
debugfs_create_file_unsafe("amdgpu_dm_skip_detection_link_training", 0644, root, adev,
&skip_detection_link_training_fops);
debugfs_create_file_unsafe("amdgpu_dm_dmub_tracebuffer", 0644, root,
adev, &dmub_tracebuffer_fops);