<html> <head> <meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1"> <style type="text/css" style="display:none;"> P {margin-top:0;margin-bottom:0;} </style> </head> <body dir="ltr"> [AMD Official Use Only - Internal Distribution Only] <div> <div style="font-family: Calibri, Arial, Helvetica, sans-serif; font-size: 12pt; color: rgb(0, 0, 0);"> I'm fine with having these changes go through drm-misc.</div> <div style="font-family: Calibri, Arial, Helvetica, sans-serif; font-size: 12pt; color: rgb(0, 0, 0);"> </div> <div style="font-family: Calibri, Arial, Helvetica, sans-serif; font-size: 12pt; color: rgb(0, 0, 0);"> Alex</div> <div style="font-family: Calibri, Arial, Helvetica, sans-serif; font-size: 12pt; color: rgb(0, 0, 0);"> </div> <div id="appendonsend"></div> <hr style="display:inline-block;width:98%" tabindex="-1"> <div id="divRplyFwdMsg" dir="ltr">From: Lipski, Mikita <Mikita.Lipski@amd.com> Sent: Wednesday, April 21, 2021 10:23 AM To: Lyude Paul <lyude@redhat.com>; dri-devel@lists.freedesktop.org <dri-devel@lists.freedesktop.org>; intel-gfx@lists.freedesktop.org <intel-gfx@lists.freedesktop.org>; nouveau@lists.freedesktop.org <nouveau@lists.freedesktop.org>; amd-gfx@lists.freedesktop.org <amd-gfx@lists.freedesktop.org>; Ville Syrjälä <ville.syrjala@linux.intel.com>; Jani Nikula <jani.nikula@linux.intel.com>; Rodrigo Vivi <rodrigo.vivi@intel.com>; Thomas Zimmermann <tzimmermann@suse.de>; Thierry Reding <thierry.reding@gmail.com> Cc: Wang, Chao-kai (Stylon) <Stylon.Wang@amd.com>; Lipski, Mikita <Mikita.Lipski@amd.com>; Park, Chris <Chris.Park@amd.com>; Brol, Eryk <Eryk.Brol@amd.com>; Li, Sun peng (Leo) <Sunpeng.Li@amd.com>; Lakha, Bhawanpreet <Bhawanpreet.Lakha@amd.com>; Lin, Wayne <Wayne.Lin@amd.com>; Siqueira, Rodrigo <Rodrigo.Siqueira@amd.com>; open list <linux-kernel@vger.kernel.org>; Kazlauskas, Nicholas <Nicholas.Kazlauskas@amd.com>; Somasundaram, Meenakshikumar <Meenakshikumar.Somasundaram@amd.com>; David Airlie <airlied@linux.ie>; Pillai, Aurabindo <Aurabindo.Pillai@amd.com>; Daniel Vetter <daniel@ffwll.ch>; Bas Nieuwenhuizen <bas@basnieuwenhuizen.nl>; Deucher, Alexander <Alexander.Deucher@amd.com>; Cornij, Nikola <Nikola.Cornij@amd.com>; Wentland, Harry <Harry.Wentland@amd.com>; Koenig, Christian <Christian.Koenig@amd.com> Subject: Re: [PATCH v3 01/20] drm/amdgpu: Add error handling to amdgpu_dm_initialize_dp_connector() <div> </div> </div> <div class="BodyFragment"> <div class="PlainText">Thanks for the change! Reviewed-by: Mikita Lipski <Mikita.Lipski@amd.com> On 2021-04-19 6:55 p.m., Lyude Paul wrote: > 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); > </div> </div> </div> </body> </html>