linux-kernel - [PATCH RFC 1/5] media: uapi: videodev2: Add support for AV1 stateful decoder

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Message-Id: <20250902-rfc_split-v1-1-47307a70c061@oss.qualcomm.com>
Date: Tue, 02 Sep 2025 16:00:03 -0700
From: DEEPA GUTHYAPPA MADIVALARA <deepa.madivalara@....qualcomm.com>
To: Mauro Carvalho Chehab <mchehab@...nel.org>,
        Vikash Garodia <quic_vgarodia@...cinc.com>,
        Dikshita Agarwal <quic_dikshita@...cinc.com>,
        Abhinav Kumar <abhinav.kumar@...ux.dev>,
        Bryan O'Donoghue <bryan.odonoghue@...aro.org>
Cc: linux-media@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-arm-msm@...r.kernel.org,
        Deepa Guthyappa Madivalara <deepa.madivalara@....qualcomm.com>
Subject: [PATCH RFC 1/5] media: uapi: videodev2: Add support for AV1
 stateful decoder

Introduce a new pixel format, V4L2_PIX_FMT_AV1, to the
Video4Linux2(V4L2) API. This format is intended for AV1
bitstreams in stateful decoding/encoding workflows.
The fourcc code 'AV10' is used to distinguish
this format from the existing V4L2_PIX_FMT_AV1_FRAME,
which is used for stateless AV1 decoder implementation.

Signed-off-by: DEEPA GUTHYAPPA MADIVALARA <deepa.madivalara@....qualcomm.com>
---
 include/uapi/linux/videodev2.h | 1 +
 1 file changed, 1 insertion(+)

diff --git a/include/uapi/linux/videodev2.h b/include/uapi/linux/videodev2.h
index 3dd9fa45dde1066d52a68581625a39e7ec92c9b7..bff42a71c67b3f4b570dd6f3d250f1bb482ec8ae 100644
--- a/include/uapi/linux/videodev2.h
+++ b/include/uapi/linux/videodev2.h
@@ -775,6 +775,7 @@ struct v4l2_pix_format {
 #define V4L2_PIX_FMT_H264_SLICE v4l2_fourcc('S', '2', '6', '4') /* H264 parsed slices */
 #define V4L2_PIX_FMT_HEVC_SLICE v4l2_fourcc('S', '2', '6', '5') /* HEVC parsed slices */
 #define V4L2_PIX_FMT_AV1_FRAME v4l2_fourcc('A', 'V', '1', 'F') /* AV1 parsed frame */
+#define V4L2_PIX_FMT_AV1      v4l2_fourcc('A', 'V', '1', '0') /* AV1 (stateful) */
 #define V4L2_PIX_FMT_SPK      v4l2_fourcc('S', 'P', 'K', '0') /* Sorenson Spark */
 #define V4L2_PIX_FMT_RV30     v4l2_fourcc('R', 'V', '3', '0') /* RealVideo 8 */
 #define V4L2_PIX_FMT_RV40     v4l2_fourcc('R', 'V', '4', '0') /* RealVideo 9 & 10 */

-- 
2.34.1