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drm/dumb-buffers: Add defaults for .dumb_map_offset and .dumb_destroy 

Almost everyone did end up using GEM as bo, so this adds defaults
for the drm_driver.dumb_destroy and drm_driver.dumb_map_offset
callbacks.

Signed-off-by: Noralf Trønnes <noralf@tronnes.org>
Reviewed-by: Eric Anholt <eric@anholt.net>
Reviewed-by: Sean Paul <seanpaul@chromium.org>
Link: https://patchwork.freedesktop.org/patch/msgid/1500837417-40580-3-git-send-email-noralf@tronnes.org
This commit is contained in:
Noralf Trønnes 2017-07-23 21:16:18 +02:00
parent db61152703
commit 0be8d63a84
1 changed files with 18 additions and 8 deletions
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26
drivers/gpu/drm/drm_dumb_buffers.c
View File

@ -24,6 +24,7 @@
*/
#include <drm/drmP.h>
#include <drm/drm_gem.h>
#include "drm_crtc_internal.h"
@ -42,9 +43,10 @@
* create dumb buffers suitable for scanout, which can then be used to create
* KMS frame buffers.
*
* To support dumb objects drivers must implement the &drm_driver.dumb_create,
* &drm_driver.dumb_destroy and &drm_driver.dumb_map_offset operations. See
* there for further details.
* To support dumb objects drivers must implement the &drm_driver.dumb_create
* operation. &drm_driver.dumb_destroy defaults to drm_gem_dumb_destroy() if
* not set and &drm_driver.dumb_map_offset defaults to
* drm_gem_dumb_map_offset(). See the callbacks for further details.
*
* Note that dumb objects may not be used for gpu acceleration, as has been
* attempted on some ARM embedded platforms. Such drivers really must have
@ -108,11 +110,16 @@ int drm_mode_mmap_dumb_ioctl(struct drm_device *dev,
{
struct drm_mode_map_dumb *args = data;
/* call driver ioctl to get mmap offset */
if (!dev->driver->dumb_map_offset)
if (!dev->driver->dumb_create)
return -ENOSYS;
return dev->driver->dumb_map_offset(file_priv, dev, args->handle, &args->offset);
if (dev->driver->dumb_map_offset)
return dev->driver->dumb_map_offset(file_priv, dev,
args->handle,
&args->offset);
else
return drm_gem_dumb_map_offset(file_priv, dev, args->handle,
&args->offset);
}
int drm_mode_destroy_dumb_ioctl(struct drm_device *dev,
@ -120,9 +127,12 @@ int drm_mode_destroy_dumb_ioctl(struct drm_device *dev,
{
struct drm_mode_destroy_dumb *args = data;
if (!dev->driver->dumb_destroy)
if (!dev->driver->dumb_create)
return -ENOSYS;
return dev->driver->dumb_destroy(file_priv, dev, args->handle);
if (dev->driver->dumb_destroy)
return dev->driver->dumb_destroy(file_priv, dev, args->handle);
else
return drm_gem_dumb_destroy(file_priv, dev, args->handle);
}