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drm/i915: Handle drm-layer errors in intel_dp_add_mst_connector 

Make intel_dp_add_mst_connector handle error returns from the drm_ calls.
Add intel_connector_free to support cleanup on the error path.

v2: Rename new function to avoid confusion, and simplify error
paths (Ville)

v3: Indentation fixup, style fixes (Ville)

v4: Clarify usage of intel_connector_free, and fix usage of
intel_connector_free

v5: Rebase

Cc: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: James Ausmus <james.ausmus@intel.com>
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20171013180144.15865-1-james.ausmus@intel.com
This commit is contained in:
James Ausmus 2017-10-13 11:01:44 -07:00 committed by Ville Syrjälä
parent 134649ff35
commit 091a4f9194
3 changed files with 37 additions and 4 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

13
drivers/gpu/drm/i915/intel_display.c
View File

@ -6139,6 +6139,19 @@ struct intel_connector *intel_connector_alloc(void)
return connector;
}
/*
* Free the bits allocated by intel_connector_alloc.
* This should only be used after intel_connector_alloc has returned
* successfully, and before drm_connector_init returns successfully.
* Otherwise the destroy callbacks for the connector and the state should
* take care of proper cleanup/free
*/
void intel_connector_free(struct intel_connector *connector)
{
kfree(to_intel_digital_connector_state(connector->base.state));
kfree(connector);
}
/* Simple connector->get_hw_state implementation for encoders that support only
* one connector and no cloning and hence the encoder state determines the state
* of the connector. */

27
drivers/gpu/drm/i915/intel_dp_mst.c
View File

@ -458,13 +458,20 @@ static struct drm_connector *intel_dp_add_mst_connector(struct drm_dp_mst_topolo
struct intel_connector *intel_connector;
struct drm_connector *connector;
enum pipe pipe;
int ret;
intel_connector = intel_connector_alloc();
if (!intel_connector)
return NULL;
connector = &intel_connector->base;
drm_connector_init(dev, connector, &intel_dp_mst_connector_funcs, DRM_MODE_CONNECTOR_DisplayPort);
ret = drm_connector_init(dev, connector, &intel_dp_mst_connector_funcs,
DRM_MODE_CONNECTOR_DisplayPort);
if (ret) {
intel_connector_free(intel_connector);
return NULL;
}
drm_connector_helper_add(connector, &intel_dp_mst_connector_helper_funcs);
intel_connector->get_hw_state = intel_dp_mst_get_hw_state;
@ -472,15 +479,27 @@ static struct drm_connector *intel_dp_add_mst_connector(struct drm_dp_mst_topolo
intel_connector->port = port;
for_each_pipe(dev_priv, pipe) {
drm_mode_connector_attach_encoder(&intel_connector->base,
&intel_dp->mst_encoders[pipe]->base.base);
struct drm_encoder *enc =
&intel_dp->mst_encoders[pipe]->base.base;
ret = drm_mode_connector_attach_encoder(&intel_connector->base,
enc);
if (ret)
goto err;
}
drm_object_attach_property(&connector->base, dev->mode_config.path_property, 0);
drm_object_attach_property(&connector->base, dev->mode_config.tile_property, 0);
drm_mode_connector_set_path_property(connector, pathprop);
ret = drm_mode_connector_set_path_property(connector, pathprop);
if (ret)
goto err;
return connector;
err:
drm_connector_cleanup(connector);
return NULL;
}
static void intel_dp_register_mst_connector(struct drm_connector *connector)

1
drivers/gpu/drm/i915/intel_drv.h
View File

@ -1363,6 +1363,7 @@ void intel_pps_unlock_regs_wa(struct drm_i915_private *dev_priv);
void intel_encoder_destroy(struct drm_encoder *encoder);
int intel_connector_init(struct intel_connector *);
struct intel_connector *intel_connector_alloc(void);
void intel_connector_free(struct intel_connector *connector);
bool intel_connector_get_hw_state(struct intel_connector *connector);
void intel_connector_attach_encoder(struct intel_connector *connector,
struct intel_encoder *encoder);