diff options
| author | Sumit Semwal <sumit.semwal@ti.com> | 2012-06-14 15:37:35 +0200 |
|---|---|---|
| committer | Mauro Carvalho Chehab <mchehab@redhat.com> | 2012-11-25 20:10:36 +0100 |
| commit | 051c7788bcb92f2e98ef86e86651e0420765b121 (patch) | |
| tree | 4ebf8044c62975ff4a0613fcf8ec1aca84910a97 /drivers/media/v4l2-core | |
| parent | [media] siano: fix build with allmodconfig (diff) | |
| download | linux-051c7788bcb92f2e98ef86e86651e0420765b121.tar.xz linux-051c7788bcb92f2e98ef86e86651e0420765b121.zip | |
[media] v4l: Add DMABUF as a memory type
Adds DMABUF memory type to v4l framework. Also adds the related file
descriptor in v4l2_plane and v4l2_buffer.
[original work in the PoC for buffer sharing]
Signed-off-by: Tomasz Stanislawski <t.stanislaws@samsung.com>
Signed-off-by: Sumit Semwal <sumit.semwal@ti.com>
Signed-off-by: Sumit Semwal <sumit.semwal@linaro.org>
Acked-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Acked-by: Hans Verkuil <hans.verkuil@cisco.com>
Tested-by: Mauro Carvalho Chehab <mchehab@redhat.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
Diffstat (limited to 'drivers/media/v4l2-core')
| -rw-r--r-- | drivers/media/v4l2-core/v4l2-compat-ioctl32.c | 18 | ||||
| -rw-r--r-- | drivers/media/v4l2-core/v4l2-ioctl.c | 1 |
2 files changed, 19 insertions, 0 deletions
diff --git a/drivers/media/v4l2-core/v4l2-compat-ioctl32.c b/drivers/media/v4l2-core/v4l2-compat-ioctl32.c index 83ffb6436baf..cc5998b31463 100644 --- a/drivers/media/v4l2-core/v4l2-compat-ioctl32.c +++ b/drivers/media/v4l2-core/v4l2-compat-ioctl32.c @@ -297,6 +297,7 @@ struct v4l2_plane32 { union { __u32 mem_offset; compat_long_t userptr; + __s32 fd; } m; __u32 data_offset; __u32 reserved[11]; @@ -318,6 +319,7 @@ struct v4l2_buffer32 { __u32 offset; compat_long_t userptr; compat_caddr_t planes; + __s32 fd; } m; __u32 length; __u32 reserved2; @@ -341,6 +343,9 @@ static int get_v4l2_plane32(struct v4l2_plane *up, struct v4l2_plane32 *up32, up_pln = compat_ptr(p); if (put_user((unsigned long)up_pln, &up->m.userptr)) return -EFAULT; + } else if (memory == V4L2_MEMORY_DMABUF) { + if (copy_in_user(&up->m.fd, &up32->m.fd, sizeof(int))) + return -EFAULT; } else { if (copy_in_user(&up->m.mem_offset, &up32->m.mem_offset, sizeof(__u32))) @@ -364,6 +369,11 @@ static int put_v4l2_plane32(struct v4l2_plane *up, struct v4l2_plane32 *up32, if (copy_in_user(&up32->m.mem_offset, &up->m.mem_offset, sizeof(__u32))) return -EFAULT; + /* For DMABUF, driver might've set up the fd, so copy it back. */ + if (memory == V4L2_MEMORY_DMABUF) + if (copy_in_user(&up32->m.fd, &up->m.fd, + sizeof(int))) + return -EFAULT; return 0; } @@ -446,6 +456,10 @@ static int get_v4l2_buffer32(struct v4l2_buffer *kp, struct v4l2_buffer32 __user if (get_user(kp->m.offset, &up->m.offset)) return -EFAULT; break; + case V4L2_MEMORY_DMABUF: + if (get_user(kp->m.fd, &up->m.fd)) + return -EFAULT; + break; } } @@ -510,6 +524,10 @@ static int put_v4l2_buffer32(struct v4l2_buffer *kp, struct v4l2_buffer32 __user if (put_user(kp->m.offset, &up->m.offset)) return -EFAULT; break; + case V4L2_MEMORY_DMABUF: + if (put_user(kp->m.fd, &up->m.fd)) + return -EFAULT; + break; } } diff --git a/drivers/media/v4l2-core/v4l2-ioctl.c b/drivers/media/v4l2-core/v4l2-ioctl.c index 8f388ff31ebb..530a67e3fe0e 100644 --- a/drivers/media/v4l2-core/v4l2-ioctl.c +++ b/drivers/media/v4l2-core/v4l2-ioctl.c @@ -155,6 +155,7 @@ static const char *v4l2_memory_names[] = { [V4L2_MEMORY_MMAP] = "mmap", [V4L2_MEMORY_USERPTR] = "userptr", [V4L2_MEMORY_OVERLAY] = "overlay", + [V4L2_MEMORY_DMABUF] = "dmabuf", }; #define prt_names(a, arr) (((unsigned)(a)) < ARRAY_SIZE(arr) ? arr[a] : "unknown") |