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 <ch...@chris-wilson.co.uk>
Signed-off-by: Laura Abbott <labb...@redhat.com>
---
v4: Switch from the now removed platformdev to a static platform device.
---
drivers/gpu/drm/vgem/vgem_drv.c | 19 ++++++++++++++++---
1 file changed, 16 insertions(+), 3 deletions(-)
diff --git a/drivers/gpu/drm/vgem/vgem_drv.c b/drivers/gpu/drm/vgem/vgem_drv.c
index 9fee38a..d1d98af 100644
--- a/drivers/gpu/drm/vgem/vgem_drv.c
+++ b/drivers/gpu/drm/vgem/vgem_drv.c
@@ -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);
}
--
2.7.4
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