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