[RFC 07/12] media: uapi: h264: Add DPB entry field reference flags

[Jonas Karlman]

Add DPB entry flags to help indicate when a reference frame is a field picture
and how the DPB entry is referenced, top or bottom field or full frame.

Signed-off-by: Jonas Karlman <jonas@xxxxxxxxx>
---
 Documentation/media/uapi/v4l/ext-ctrls-codec.rst | 12 ++++++++++++
 include/media/h264-ctrls.h                       |  4 ++++
 2 files changed, 16 insertions(+)

diff --git a/Documentation/media/uapi/v4l/ext-ctrls-codec.rst b/Documentation/media/uapi/v4l/ext-ctrls-codec.rst
index bc5dd8e76567..eb6c32668ad7 100644
--- a/Documentation/media/uapi/v4l/ext-ctrls-codec.rst
+++ b/Documentation/media/uapi/v4l/ext-ctrls-codec.rst
@@ -2022,6 +2022,18 @@ enum v4l2_mpeg_video_h264_hierarchical_coding_type -
     * - ``V4L2_H264_DPB_ENTRY_FLAG_LONG_TERM``
       - 0x00000004
       - The DPB entry is a long term reference frame
+    * - ``V4L2_H264_DPB_ENTRY_FLAG_FIELD_PICTURE``
+      - 0x00000008
+      - The DPB entry is a field picture
+    * - ``V4L2_H264_DPB_ENTRY_FLAG_REF_TOP``
+      - 0x00000010
+      - The DPB entry is a top field reference
+    * - ``V4L2_H264_DPB_ENTRY_FLAG_REF_BOTTOM``
+      - 0x00000020
+      - The DPB entry is a bottom field reference
+    * - ``V4L2_H264_DPB_ENTRY_FLAG_REF_FRAME``
+      - 0x00000030
+      - The DPB entry is a reference frame
 
 ``V4L2_CID_MPEG_VIDEO_H264_DECODE_MODE (enum)``
     Specifies the decoding mode to use. Currently exposes slice-based and
diff --git a/include/media/h264-ctrls.h b/include/media/h264-ctrls.h
index e877bf1d537c..76020ebd1e6c 100644
--- a/include/media/h264-ctrls.h
+++ b/include/media/h264-ctrls.h
@@ -185,6 +185,10 @@ struct v4l2_ctrl_h264_slice_params {
 #define V4L2_H264_DPB_ENTRY_FLAG_VALID		0x01
 #define V4L2_H264_DPB_ENTRY_FLAG_ACTIVE		0x02
 #define V4L2_H264_DPB_ENTRY_FLAG_LONG_TERM	0x04
+#define V4L2_H264_DPB_ENTRY_FLAG_FIELD_PICTURE	0x08
+#define V4L2_H264_DPB_ENTRY_FLAG_REF_TOP	0x10
+#define V4L2_H264_DPB_ENTRY_FLAG_REF_BOTTOM	0x20
+#define V4L2_H264_DPB_ENTRY_FLAG_REF_FRAME	0x30
 
 struct v4l2_h264_dpb_entry {
 	__u64 reference_ts;
-- 
2.17.1