While working on moving i2c device registration into drm_dp_aux_init() - I realized that in order to do so we need to make sure that drivers calling drm_dp_aux_init() handle any errors it could possibly return. In the process of doing that, I noticed that the majority of AMD's code for DP connector creation doesn't attempt to do any real error handling.
So, let's fix this and also cleanup amdgpu_dm_initialize_dp_connector() while we're at it. This way we can handle the error codes from drm_dp_aux_init().
Signed-off-by: Lyude Paul lyude@redhat.com --- .../gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c | 29 +++++++----- .../display/amdgpu_dm/amdgpu_dm_mst_types.c | 44 +++++++++++-------- .../display/amdgpu_dm/amdgpu_dm_mst_types.h | 6 +-- 3 files changed, 45 insertions(+), 34 deletions(-)
diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c index a0c8c41e4e57..fc5d315bbb05 100644 --- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c +++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c @@ -7608,10 +7608,9 @@ static int amdgpu_dm_connector_init(struct amdgpu_display_manager *dm,
aconnector->i2c = i2c; res = i2c_add_adapter(&i2c->base); - if (res) { DRM_ERROR("Failed to register hw i2c %d\n", link->link_index); - goto out_free; + goto fail_free; }
connector_type = to_drm_connector_type(link->connector_signal); @@ -7625,8 +7624,7 @@ static int amdgpu_dm_connector_init(struct amdgpu_display_manager *dm,
if (res) { DRM_ERROR("connector_init failed\n"); - aconnector->connector_id = -1; - goto out_free; + goto fail_id; }
drm_connector_helper_add( @@ -7643,15 +7641,22 @@ static int amdgpu_dm_connector_init(struct amdgpu_display_manager *dm, drm_connector_attach_encoder( &aconnector->base, &aencoder->base);
- if (connector_type == DRM_MODE_CONNECTOR_DisplayPort - || connector_type == DRM_MODE_CONNECTOR_eDP) - amdgpu_dm_initialize_dp_connector(dm, aconnector, link->link_index); - -out_free: - if (res) { - kfree(i2c); - aconnector->i2c = NULL; + if (connector_type == DRM_MODE_CONNECTOR_DisplayPort || + connector_type == DRM_MODE_CONNECTOR_eDP) { + res = amdgpu_dm_initialize_dp_connector(dm, aconnector, link->link_index); + if (res) + goto fail_cleanup; } + + return 0; +fail_cleanup: + drm_connector_cleanup(&aconnector->base); +fail_id: + aconnector->connector_id = -1; +fail_free: + kfree(i2c); + aconnector->i2c = NULL; + return res; }
diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_mst_types.c b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_mst_types.c index 73cdb9fe981a..3dee9cce9c9e 100644 --- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_mst_types.c +++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_mst_types.c @@ -425,33 +425,39 @@ static const struct drm_dp_mst_topology_cbs dm_mst_cbs = { .add_connector = dm_dp_add_mst_connector, };
-void amdgpu_dm_initialize_dp_connector(struct amdgpu_display_manager *dm, - struct amdgpu_dm_connector *aconnector, - int link_index) +int amdgpu_dm_initialize_dp_connector(struct amdgpu_display_manager *dm, + struct amdgpu_dm_connector *aconnector, + int link_index) { - aconnector->dm_dp_aux.aux.name = - kasprintf(GFP_KERNEL, "AMDGPU DM aux hw bus %d", - link_index); - aconnector->dm_dp_aux.aux.transfer = dm_dp_aux_transfer; - aconnector->dm_dp_aux.ddc_service = aconnector->dc_link->ddc; + struct amdgpu_dm_dp_aux *dm_aux = &aconnector->dm_dp_aux; + int ret;
- drm_dp_aux_init(&aconnector->dm_dp_aux.aux); - drm_dp_cec_register_connector(&aconnector->dm_dp_aux.aux, - &aconnector->base); + dm_aux->aux.name = kasprintf(GFP_KERNEL, "AMDGPU DM aux hw bus %d", link_index); + if (!dm_aux->aux.name) + return -ENOMEM; + + dm_aux->aux.transfer = dm_dp_aux_transfer; + dm_aux->ddc_service = aconnector->dc_link->ddc; + + drm_dp_aux_init(&dm_aux->aux); + drm_dp_cec_register_connector(&dm_aux->aux, &aconnector->base);
if (aconnector->base.connector_type == DRM_MODE_CONNECTOR_eDP) - return; + return 0;
aconnector->mst_mgr.cbs = &dm_mst_cbs; - drm_dp_mst_topology_mgr_init( - &aconnector->mst_mgr, - adev_to_drm(dm->adev), - &aconnector->dm_dp_aux.aux, - 16, - 4, - aconnector->connector_id); + ret = drm_dp_mst_topology_mgr_init(&aconnector->mst_mgr, adev_to_drm(dm->adev), + &dm_aux->aux, 16, 4, aconnector->connector_id); + if (ret) + goto unreg_cec;
drm_connector_attach_dp_subconnector_property(&aconnector->base); + + return 0; +unreg_cec: + drm_dp_cec_unregister_connector(&dm_aux->aux); + kfree(dm_aux->aux.name); + return ret; }
int dm_mst_get_pbn_divider(struct dc_link *link) diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_mst_types.h b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_mst_types.h index b38bd68121ce..cf771ff58bb3 100644 --- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_mst_types.h +++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_mst_types.h @@ -31,9 +31,9 @@ struct amdgpu_dm_connector;
int dm_mst_get_pbn_divider(struct dc_link *link);
-void amdgpu_dm_initialize_dp_connector(struct amdgpu_display_manager *dm, - struct amdgpu_dm_connector *aconnector, - int link_index); +int amdgpu_dm_initialize_dp_connector(struct amdgpu_display_manager *dm, + struct amdgpu_dm_connector *aconnector, + int link_index);
void dm_dp_create_fake_mst_encoders(struct amdgpu_device *adev);