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| author | David Francis <David.Francis@amd.com> | 2019-07-25 15:22:16 -0400 |
|---|---|---|
| committer | Alex Deucher <alexander.deucher@amd.com> | 2019-08-23 11:43:28 -0500 |
| commit | 0ec7d06b225663d62e8867951114375a512e56c4 (patch) | |
| tree | 8a71f706a1396691fd45f6e43b2fbf5d0bc51719 /drivers/gpu | |
| parent | 78d9b95ecf8a9b4cb871297359b7b804ee0c6925 (diff) | |
| download | linux-0ec7d06b225663d62e8867951114375a512e56c4.tar.gz | |
drm/amd/display: MST topology debugfs
DRM provides drm_dp_mst_dump_topology, which prints useful information about MST devices Hook this up to a debugfs file named amdgpu_mst_topology Signed-off-by: David Francis <David.Francis@amd.com> Acked-by: Bhawanpreet Lakha <Bhawanpreet.Lakha@amd.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Diffstat (limited to 'drivers/gpu')
| -rw-r--r-- | drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_debugfs.c | 24 |
1 files changed, 24 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 36a1d794b4af..f3dfb2887ae0 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 @@ -1053,9 +1053,33 @@ static int target_backlight_read(struct seq_file *m, void *data) return 0; } +static int mst_topo(struct seq_file *m, void *unused) +{ + struct drm_info_node *node = (struct drm_info_node *)m->private; + struct drm_device *dev = node->minor->dev; + struct drm_connector *connector; + struct drm_connector_list_iter conn_iter; + struct amdgpu_dm_connector *aconnector; + + drm_connector_list_iter_begin(dev, &conn_iter); + drm_for_each_connector_iter(connector, &conn_iter) { + if (connector->connector_type != DRM_MODE_CONNECTOR_DisplayPort) + continue; + + aconnector = to_amdgpu_dm_connector(connector); + + seq_printf(m, "\nMST topology for connector %d\n", aconnector->connector_id); + drm_dp_mst_dump_topology(m, &aconnector->mst_mgr); + } + drm_connector_list_iter_end(&conn_iter); + + return 0; +} + static const struct drm_info_list amdgpu_dm_debugfs_list[] = { {"amdgpu_current_backlight_pwm", ¤t_backlight_read}, {"amdgpu_target_backlight_pwm", &target_backlight_read}, + {"amdgpu_mst_topology", &mst_topo}, }; /* |