drm/rockchip: gem: import dma_buf to gem

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>

diff --git a/drivers/gpu/drm/rockchip/rockchip_drm_drv.c b/drivers/gpu/drm/rockchip/rockchip_drm_drv.c
index a651162dbf1842dfb88b58c009fbad339c213074..d0cb8b62afea7376b7451b18130629c5e12b086d 100644 (file)
--- a/drivers/gpu/drm/rockchip/rockchip_drm_drv.c
+++ b/drivers/gpu/drm/rockchip/rockchip_drm_drv.c
@@ -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,

diff --git a/drivers/gpu/drm/rockchip/rockchip_drm_gem.c b/drivers/gpu/drm/rockchip/rockchip_drm_gem.c
index b215dc890adb479dd91b9c7e38d5912c100c37cb..92dc967d71f30bbf2a618f2e10e0b8f3d1c3a78d 100644 (file)
--- a/drivers/gpu/drm/rockchip/rockchip_drm_gem.c
+++ b/drivers/gpu/drm/rockchip/rockchip_drm_gem.c
@@ -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);

diff --git a/drivers/gpu/drm/rockchip/rockchip_drm_gem.h b/drivers/gpu/drm/rockchip/rockchip_drm_gem.h
index 0cbe8606e4d1f1f20b17b4f6eca5dacf5b3627b2..c10582ec0b5917c3569ab15a28a0bc5d9c5cf9cf 100644 (file)
--- a/drivers/gpu/drm/rockchip/rockchip_drm_gem.h
+++ b/drivers/gpu/drm/rockchip/rockchip_drm_gem.h
@@ -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);