On Tue, Jul 14, 2020 at 10:32:38AM +0200, Thomas Zimmermann wrote:
> Don't override the GEM object functions unconditionally. If the driver
> sets the GEM functions, VRAM helpers will now them. The idea has been
s/now/own
> taken from SHMEM helpers. If drivers need special versions of some of
> the GEM functions, they can now override them.
>
> Signed-off-by: Thomas Zimmermann <tzimmermann@xxxxxxx>
> ---
> drivers/gpu/drm/drm_gem_vram_helper.c | 10 ++++++----
> 1 file changed, 6 insertions(+), 4 deletions(-)
>
> diff --git a/drivers/gpu/drm/drm_gem_vram_helper.c b/drivers/gpu/drm/drm_gem_vram_helper.c
> index af767d3da5da..7194144610cb 100644
> --- a/drivers/gpu/drm/drm_gem_vram_helper.c
> +++ b/drivers/gpu/drm/drm_gem_vram_helper.c
> @@ -190,6 +190,7 @@ struct drm_gem_vram_object *drm_gem_vram_create(struct drm_device *dev,
> unsigned long pg_align)
The documentation of drm_gem_vram_create() could really use some love
here. It should document the behavior around gem_create_object(), and
the default allocation of drm_gem_vram_object with no drm_gem_object
assigned etc.
Sam
> {
> struct drm_gem_vram_object *gbo;
> + struct drm_gem_object *gem;
> struct drm_vram_mm *vmm = dev->vram_mm;
> struct ttm_bo_device *bdev;
> int ret;
> @@ -199,8 +200,7 @@ struct drm_gem_vram_object *drm_gem_vram_create(struct drm_device *dev,
> return ERR_PTR(-EINVAL);
>
> if (dev->driver->gem_create_object) {
> - struct drm_gem_object *gem =
> - dev->driver->gem_create_object(dev, size);
> + gem = dev->driver->gem_create_object(dev, size);
> if (!gem)
> return ERR_PTR(-ENOMEM);
> gbo = drm_gem_vram_of_gem(gem);
> @@ -208,11 +208,13 @@ struct drm_gem_vram_object *drm_gem_vram_create(struct drm_device *dev,
> gbo = kzalloc(sizeof(*gbo), GFP_KERNEL);
> if (!gbo)
> return ERR_PTR(-ENOMEM);
> + gem = &gbo->bo.base;
> }
>
> - gbo->bo.base.funcs = &drm_gem_vram_object_funcs;
> + if (!gem->funcs)
> + gem->funcs = &drm_gem_vram_object_funcs;
>
> - ret = drm_gem_object_init(dev, &gbo->bo.base, size);
> + ret = drm_gem_object_init(dev, gem, size);
> if (ret) {
> kfree(gbo);
> return ERR_PTR(ret);
> --
> 2.27.0
>
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