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drm: Introduce drm_dev_set_unique()

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Add a helper function that allows drivers to statically set the unique
name of the device. This will allow platform and USB drivers to get rid
of their DRM bus implementations and directly use drm_dev_alloc() and
drm_dev_register().

Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Reviewed-by: David Herrmann <dh.herrmann@gmail.com>
Signed-off-by: Thierry Reding <treding@nvidia.com>
This commit is contained in:
Thierry Reding
2014-04-11 15:23:00 +02:00
parent 0c7dfd36b7
commit ca8e2ad710
3 changed files with 46 additions and 6 deletions
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24
drivers/gpu/drm/drm_ioctl.c
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@@ -131,13 +131,25 @@ static int drm_set_busid(struct drm_device *dev, struct drm_file *file_priv)
if (master->unique != NULL)
drm_unset_busid(dev, master);
ret = dev->driver->bus->set_busid(dev, master);
if (ret)
goto err;
if (dev->driver->bus && dev->driver->bus->set_busid) {
ret = dev->driver->bus->set_busid(dev, master);
if (ret) {
drm_unset_busid(dev, master);
return ret;
}
} else {
if (WARN(dev->unique == NULL,
"No drm_bus.set_busid() implementation provided by "
"%ps. Use drm_dev_set_unique() to set the unique "
"name explicitly.", dev->driver))
return -EINVAL;
master->unique = kstrdup(dev->unique, GFP_KERNEL);
if (master->unique)
master->unique_len = strlen(dev->unique);
}
return 0;
err:
drm_unset_busid(dev, master);
return ret;
}
/**