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drm/vgem: Add a dummy platform device

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The vgem driver is currently registered independent of any actual
device. Some usage of the dmabuf APIs require an actual device structure
to do anything. Register a dummy platform device for use with dmabuf.

Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Laura Abbott <labbott@redhat.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Link: http://patchwork.freedesktop.org/patch/msgid/1493923548-20878-2-git-send-email-labbott@redhat.com
This commit is contained in:
Laura Abbott 2017-05-04 11:45:46 -07:00 committed by Daniel Vetter
parent f424f55e31
commit e2aff44868
1 changed files with 16 additions and 3 deletions
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19
drivers/gpu/drm/vgem/vgem_drv.c
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@ -42,6 +42,8 @@
#define DRIVER_MAJOR 1
#define DRIVER_MINOR 0
static struct platform_device *vgem_platform;
static void vgem_gem_free_object(struct drm_gem_object *obj)
{
struct drm_vgem_gem_object *vgem_obj = to_vgem_bo(obj);
@ -335,11 +337,20 @@ static int __init vgem_init(void)
int ret;
vgem_device = drm_dev_alloc(&vgem_driver, NULL);
if (IS_ERR(vgem_device)) {
ret = PTR_ERR(vgem_device);
if (IS_ERR(vgem_device))
return PTR_ERR(vgem_device);
vgem_platform = platform_device_register_simple("vgem",
-1, NULL, 0);
if (!vgem_platform) {
ret = -ENODEV;
goto out;
}
dma_coerce_mask_and_coherent(&vgem_platform->dev,
DMA_BIT_MASK(64));
ret = drm_dev_register(vgem_device, 0);
if (ret)
goto out_unref;
@ -347,13 +358,15 @@ static int __init vgem_init(void)
return 0;
out_unref:
drm_dev_unref(vgem_device);
platform_device_unregister(vgem_platform);
out:
drm_dev_unref(vgem_device);
return ret;
}
static void __exit vgem_exit(void)
{
platform_device_unregister(vgem_platform);
drm_dev_unregister(vgem_device);
drm_dev_unref(vgem_device);
}