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drm/vram-helper: Support struct drm_driver.gem_create_object 

Drivers that what to allocate VRAM GEM objects with additional fields
can now do this by implementing struct drm_driver.gem_create_object.

v3:
	* separately check allocation failure in if/else branches
	  before upcast to gbo
v2:
	* only cast to gbo within if branch; set gbo directly
	  in else branch

Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Acked-by: Sam Ravnborg <sam@ravnborg.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20200106125745.13797-9-tzimmermann@suse.de
This commit is contained in:
Thomas Zimmermann 2020-01-06 13:57:45 +01:00
parent a4d46a8e26
commit 0fb5f69e19
1 changed files with 12 additions and 3 deletions
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15
drivers/gpu/drm/drm_gem_vram_helper.c
View File

@ -2,6 +2,7 @@
#include <drm/drm_debugfs.h>
#include <drm/drm_device.h>
#include <drm/drm_drv.h>
#include <drm/drm_file.h>
#include <drm/drm_framebuffer.h>
#include <drm/drm_gem_ttm_helper.h>
@ -145,9 +146,17 @@ struct drm_gem_vram_object *drm_gem_vram_create(struct drm_device *dev,
struct drm_gem_vram_object *gbo;
int ret;
gbo = kzalloc(sizeof(*gbo), GFP_KERNEL);
if (!gbo)
return ERR_PTR(-ENOMEM);
if (dev->driver->gem_create_object) {
struct drm_gem_object *gem =
dev->driver->gem_create_object(dev, size);
if (!gem)
return ERR_PTR(-ENOMEM);
gbo = drm_gem_vram_of_gem(gem);
} else {
gbo = kzalloc(sizeof(*gbo), GFP_KERNEL);
if (!gbo)
return ERR_PTR(-ENOMEM);
}
ret = drm_gem_vram_init(dev, gbo, size, pg_align);
if (ret < 0)