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drm/amd/display: MST topology debugfs

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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>
This commit is contained in:
David Francis 2019-07-25 15:22:16 -04:00 committed by Alex Deucher
parent 78d9b95ecf
commit 0ec7d06b22
1 changed files with 24 additions and 0 deletions
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24
drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_debugfs.c
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@ -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", &current_backlight_read},
{"amdgpu_target_backlight_pwm", &target_backlight_read},
{"amdgpu_mst_topology", &mst_topo},
};
/*