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drm: Update drm_device docs about embedding.

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It's supported now! Spotted while reviewing Chris' patch to add a
release hook.

Cc: Chris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/20161208102847.3063-1-daniel.vetter@ffwll.ch
This commit is contained in:
Daniel Vetter 2016-12-08 11:28:47 +01:00
parent 72a93e8dd5
commit d82faafd81
1 changed files with 7 additions and 4 deletions
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11
drivers/gpu/drm/drm_drv.c
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@ -323,9 +323,8 @@ void drm_minor_release(struct drm_minor *minor)
* historical baggage. Hence use the reference counting provided by
* drm_dev_ref() and drm_dev_unref() only carefully.
*
* Also note that embedding of &drm_device is currently not (yet) supported (but
* it would be easy to add). Drivers can store driver-private data in the
* dev_priv field of &drm_device.
* It is recommended that drivers embed struct &drm_device into their own device
* structure, which is supported through drm_dev_init().
*/
/**
@ -462,7 +461,11 @@ static void drm_fs_inode_free(struct inode *inode)
* Note that for purely virtual devices @parent can be NULL.
*
* Drivers that do not want to allocate their own device struct
* embedding struct &drm_device can call drm_dev_alloc() instead.
* embedding struct &drm_device can call drm_dev_alloc() instead. For drivers
* that do embed struct &drm_device it must be placed first in the overall
* structure, and the overall structure must be allocated using kmalloc(): The
* drm core's release function unconditionally calls kfree() on the @dev pointer
* when the final reference is released.
*
* RETURNS:
* 0 on success, or error code on failure.