From e2aff44868ae60eccae806d3751077155675c2a4 Mon Sep 17 00:00:00 2001 From: Laura Abbott Date: Thu, 4 May 2017 11:45:46 -0700 Subject: [PATCH] drm/vgem: Add a dummy platform device 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 Signed-off-by: Laura Abbott Signed-off-by: Daniel Vetter Link: http://patchwork.freedesktop.org/patch/msgid/1493923548-20878-2-git-send-email-labbott@redhat.com --- 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