[media] V4L: Add capability flags for memory-to-memory devices

This patch adds new V4L2_CAP_VIDEO_M2M and V4L2_CAP_VIDEO_M2M_MPLANE
capability flags that are intended to be used for memory-to-memory (M2M)
devices, instead of ORed V4L2_CAP_VIDEO_CAPTURE and V4L2_CAP_VIDEO_OUTPUT.

V4L2_CAP_VIDEO_M2M flag is added at the drivers, CAPTURE and OUTPUT
capability flags are left untouched and will be removed in future,
after a transition period required for existing applications to be
adapted to check only for V4L2_CAP_VIDEO_M2M.

Signed-off-by: Sylwester Nawrocki <s.nawrocki@samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
Acked-by: Kamil Debski <k.debski@samsung.com>
Acked-by: Andrzej Pietrasiewicz <andrzej.p@samsung.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

1 files changed, 8 insertions, 3 deletions

diff --git a/drivers/media/video/s5p-mfc/s5p_mfc_enc.c b/drivers/media/video/s5p-mfc/s5p_mfc_enc.c
index 158b78989b8..aa1c244cf66 100644
--- a/drivers/media/video/s5p-mfc/s5p_mfc_enc.c
+++ b/drivers/media/video/s5p-mfc/s5p_mfc_enc.c
@@ -779,9 +779,14 @@ static int vidioc_querycap(struct file *file, void *priv,
         strncpy(cap->card, dev->plat_dev->name, sizeof(cap->card) - 1);
         cap->bus_info[0] = 0;
         cap->version = KERNEL_VERSION(1, 0, 0);
-        cap->capabilities = V4L2_CAP_VIDEO_CAPTURE_MPLANE
-                          | V4L2_CAP_VIDEO_OUTPUT_MPLANE
-                          | V4L2_CAP_STREAMING;
+        /*
+         * This is only a mem-to-mem video device. The capture and output
+         * device capability flags are left only for backward compatibility
+         * and are scheduled for removal.
+         */
+        cap->capabilities = V4L2_CAP_VIDEO_M2M_MPLANE | V4L2_CAP_STREAMING |
+                            V4L2_CAP_VIDEO_CAPTURE_MPLANE |
+                            V4L2_CAP_VIDEO_OUTPUT_MPLANE;
         return 0;
 }