exported gem buffer into dmabuf should be released when a gem relese is
requested by user. with dma_buf_put() call, if file->f_count is 0 then
a release callback of exynos gem module(exporter) will be called to release
its own gem buffer.
Signed-off-by: Inki Dae <inki.dae@xxxxxxxxxxx>
Signed-off-by: Kyungmin Park <kyungmin.park@xxxxxxxxxxx>
---
drivers/gpu/drm/exynos/exynos_drm_drv.c | 1 +
drivers/gpu/drm/exynos/exynos_drm_gem.c | 16 ++++++++++++++++
drivers/gpu/drm/exynos/exynos_drm_gem.h | 4 ++++
3 files changed, 21 insertions(+), 0 deletions(-)
diff --git a/drivers/gpu/drm/exynos/exynos_drm_drv.c b/drivers/gpu/drm/exynos/exynos_drm_drv.c
index d6de2e0..1501dd2 100644
--- a/drivers/gpu/drm/exynos/exynos_drm_drv.c
+++ b/drivers/gpu/drm/exynos/exynos_drm_drv.c
@@ -258,6 +258,7 @@ static struct drm_driver exynos_drm_driver = {
.gem_init_object = exynos_drm_gem_init_object,
.gem_free_object = exynos_drm_gem_free_object,
.gem_vm_ops = &exynos_drm_gem_vm_ops,
+ .gem_close_object = exynos_drm_gem_close_object,
.dumb_create = exynos_drm_gem_dumb_create,
.dumb_map_offset = exynos_drm_gem_dumb_map_offset,
.dumb_destroy = exynos_drm_gem_dumb_destroy,
diff --git a/drivers/gpu/drm/exynos/exynos_drm_gem.c b/drivers/gpu/drm/exynos/exynos_drm_gem.c
index 411d82b..5ca8641 100644
--- a/drivers/gpu/drm/exynos/exynos_drm_gem.c
+++ b/drivers/gpu/drm/exynos/exynos_drm_gem.c
@@ -27,6 +27,7 @@
#include "drm.h"
#include <linux/shmem_fs.h>
+#include <linux/dma-buf.h>
#include <drm/exynos_drm.h>
#include "exynos_drm_drv.h"
@@ -749,6 +750,21 @@ int exynos_drm_gem_dumb_destroy(struct drm_file *file_priv,
return 0;
}
+void exynos_drm_gem_close_object(struct drm_gem_object *obj,
+ struct drm_file *file)
+{
+ DRM_DEBUG_KMS("%s\n", __FILE__);
+
+ /*
+ * exported dmabuf should be released when a gem is released by user.
+ * with dma_buf_put() call, if file->f_count is 0 then a release
+ * callback of gem module(exporter) will be called to release
+ * its own gem buffer.
+ */
+ if (obj->export_dma_buf)
+ dma_buf_put(obj->export_dma_buf);
+}
+
int exynos_drm_gem_fault(struct vm_area_struct *vma, struct vm_fault *vmf)
{
struct drm_gem_object *obj = vma->vm_private_data;
diff --git a/drivers/gpu/drm/exynos/exynos_drm_gem.h b/drivers/gpu/drm/exynos/exynos_drm_gem.h
index 14d038b..4f1ba1a 100644
--- a/drivers/gpu/drm/exynos/exynos_drm_gem.h
+++ b/drivers/gpu/drm/exynos/exynos_drm_gem.h
@@ -162,4 +162,8 @@ int exynos_drm_gem_fault(struct vm_area_struct *vma, struct vm_fault *vmf);
/* set vm_flags and we can change the vm attribute to other one at here. */
int exynos_drm_gem_mmap(struct file *filp, struct vm_area_struct *vma);
+/* do extra release exynos gem module needs when gem close is called. */
+void exynos_drm_gem_close_object(struct drm_gem_object *obj,
+ struct drm_file *file);
+
#endif
--
1.7.4.1
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