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Message-Id: <20210419225523.184856-2-lyude@redhat.com>
Date: Mon, 19 Apr 2021 18:55:03 -0400
From: Lyude Paul <lyude@...hat.com>
To: dri-devel@...ts.freedesktop.org, intel-gfx@...ts.freedesktop.org,
nouveau@...ts.freedesktop.org, amd-gfx@...ts.freedesktop.org,
Ville Syrjälä
<ville.syrjala@...ux.intel.com>,
Jani Nikula <jani.nikula@...ux.intel.com>,
Rodrigo Vivi <rodrigo.vivi@...el.com>,
Thomas Zimmermann <tzimmermann@...e.de>,
Thierry Reding <thierry.reding@...il.com>
Cc: Harry Wentland <harry.wentland@....com>,
Leo Li <sunpeng.li@....com>,
Alex Deucher <alexander.deucher@....com>,
Christian König <christian.koenig@....com>,
David Airlie <airlied@...ux.ie>,
Daniel Vetter <daniel@...ll.ch>,
Nicholas Kazlauskas <nicholas.kazlauskas@....com>,
Rodrigo Siqueira <Rodrigo.Siqueira@....com>,
Aurabindo Pillai <aurabindo.pillai@....com>,
Eryk Brol <eryk.brol@....com>,
Stylon Wang <stylon.wang@....com>,
Bhawanpreet Lakha <Bhawanpreet.Lakha@....com>,
Bas Nieuwenhuizen <bas@...nieuwenhuizen.nl>,
Nikola Cornij <nikola.cornij@....com>,
Mikita Lipski <mikita.lipski@....com>,
Wayne Lin <Wayne.Lin@....com>, Chris Park <Chris.Park@....com>,
Meenakshikumar Somasundaram <meenakshikumar.somasundaram@....com>,
linux-kernel@...r.kernel.org (open list)
Subject: [PATCH v3 01/20] drm/amdgpu: Add error handling to amdgpu_dm_initialize_dp_connector()
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@...hat.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);
--
2.30.2
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