diff options
Diffstat (limited to 'drivers/gpu/drm/amd/display')
| -rw-r--r-- | drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_debugfs.c | 17 |
1 files changed, 14 insertions, 3 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 a1f40d0cd41c..e0ea350784e3 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 @@ -1256,14 +1256,22 @@ static ssize_t trigger_hotplug(struct file *f, const char __user *buf, return -EINVAL; } + kfree(wr_buf); + if (param_nums <= 0) { DRM_DEBUG_DRIVER("user data not be read\n"); - kfree(wr_buf); + return -EINVAL; + } + + mutex_lock(&aconnector->hpd_lock); + + /* Don't support for mst end device*/ + if (aconnector->mst_port) { + mutex_unlock(&aconnector->hpd_lock); return -EINVAL; } if (param[0] == 1) { - mutex_lock(&aconnector->hpd_lock); if (!dc_link_detect_sink(aconnector->dc_link, &new_connection_type) && new_connection_type != dc_connection_none) @@ -1300,6 +1308,10 @@ static ssize_t trigger_hotplug(struct file *f, const char __user *buf, amdgpu_dm_update_connector_after_detect(aconnector); + /* If the aconnector is the root node in mst topology */ + if (aconnector->mst_mgr.mst_state == true) + reset_cur_dp_mst_topology(link); + drm_modeset_lock_all(dev); dm_restore_drm_connector_state(dev, connector); drm_modeset_unlock_all(dev); @@ -1310,7 +1322,6 @@ static ssize_t trigger_hotplug(struct file *f, const char __user *buf, unlock: mutex_unlock(&aconnector->hpd_lock); - kfree(wr_buf); return size; } |