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drm/rockchip: gem: import dma_buf to gem

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We want to display a buffer allocated by other driver, need import
the buffer to gem.

Change-Id: Ifd5fef3fbf2b4daea6d624ed2a250c2fe626309d
Signed-off-by: Mark Yao <mark.yao@rock-chips.com>
Signed-off-by: Yakir Yang <ykk@rock-chips.com>
This commit is contained in:
Mark Yao
2015-06-26 09:27:18 +08:00
committed by Huang, Tao
parent 63c6ce27ba
commit a05932da07
3 changed files with 33 additions and 4 deletions
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1
drivers/gpu/drm/rockchip/rockchip_drm_drv.c
View File

@@ -474,6 +474,7 @@ static struct drm_driver rockchip_drm_driver = {
.prime_handle_to_fd = drm_gem_prime_handle_to_fd,
.prime_fd_to_handle = drm_gem_prime_fd_to_handle,
.gem_prime_import = drm_gem_prime_import,
.gem_prime_import_sg_table = rockchip_gem_prime_import_sg_table,
.gem_prime_export = drm_gem_prime_export,
.gem_prime_get_sg_table = rockchip_gem_prime_get_sg_table,
.gem_prime_vmap = rockchip_gem_prime_vmap,

32
drivers/gpu/drm/rockchip/rockchip_drm_gem.c
View File

@@ -109,6 +109,29 @@ int rockchip_gem_mmap(struct file *filp, struct vm_area_struct *vma)
return rockchip_drm_gem_object_mmap(obj, vma);
}
struct drm_gem_object *
rockchip_gem_prime_import_sg_table(struct drm_device *drm,
struct dma_buf_attachment *attach,
struct sg_table *sgt)
{
struct rockchip_gem_object *rk_obj;
struct drm_gem_object *obj;
rk_obj = kzalloc(sizeof(*rk_obj), GFP_KERNEL);
if (!rk_obj)
return ERR_PTR(-ENOMEM);
obj = &rk_obj->base;
drm_gem_private_object_init(drm, obj, attach->dmabuf->size);
rk_obj->dma_addr = sg_dma_address(sgt->sgl);
rk_obj->sgt = sgt;
sg_dma_len(sgt->sgl) = obj->size;
return obj;
}
struct rockchip_gem_object *
rockchip_gem_create_object(struct drm_device *drm, unsigned int size,
bool alloc_kmap)
@@ -146,11 +169,14 @@ void rockchip_gem_free_object(struct drm_gem_object *obj)
{
struct rockchip_gem_object *rk_obj;
drm_gem_free_mmap_offset(obj);
rk_obj = to_rockchip_obj(obj);
rockchip_gem_free_buf(rk_obj);
if (obj->import_attach) {
drm_prime_gem_destroy(obj, rk_obj->sgt);
} else {
drm_gem_free_mmap_offset(obj);
rockchip_gem_free_buf(rk_obj);
}
#ifdef CONFIG_DRM_DMA_SYNC
drm_fence_signal_and_put(&rk_obj->acquire_fence);

4
drivers/gpu/drm/rockchip/rockchip_drm_gem.h
View File

@@ -21,6 +21,7 @@ struct rockchip_gem_object {
struct drm_gem_object base;
unsigned int flags;
struct sg_table *sgt;
void *kvaddr;
dma_addr_t dma_addr;
struct dma_attrs dma_attrs;
@@ -45,7 +46,8 @@ struct rockchip_gem_object_node {
struct sg_table *rockchip_gem_prime_get_sg_table(struct drm_gem_object *obj);
struct drm_gem_object *
rockchip_gem_prime_import_sg_table(struct drm_device *dev, size_t size,
rockchip_gem_prime_import_sg_table(struct drm_device *dev,
struct dma_buf_attachment *attach,
struct sg_table *sgt);
void *rockchip_gem_prime_vmap(struct drm_gem_object *obj);
void rockchip_gem_prime_vunmap(struct drm_gem_object *obj, void *vaddr);