[PATCH v7 01/18] media: Add RPP_X1_PARAMS and RPP_X1_STATS meta formats

From: Jai Luthra

Date: Fri Apr 10 2026 - 05:07:44 EST


Register V4L2 metadata fourcc codes for the Dreamchip RPP-X1 ISP
parameters and statistics buffers. These formats are used by the driver
to exchange ISP configuration and 3A statistics with userspace through
the extensible parameters framework.

Signed-off-by: Jai Luthra <jai.luthra+renesas@xxxxxxxxxxxxxxxx>
---
drivers/media/v4l2-core/v4l2-ioctl.c | 2 ++
include/uapi/linux/videodev2.h | 4 ++++
2 files changed, 6 insertions(+)

diff --git a/drivers/media/v4l2-core/v4l2-ioctl.c b/drivers/media/v4l2-core/v4l2-ioctl.c
index a2b650f4ec3c32a4883521f34fb51eed13c71d76..cd3f4a86e27f22a0108ad2932cba755295af9a98 100644
--- a/drivers/media/v4l2-core/v4l2-ioctl.c
+++ b/drivers/media/v4l2-core/v4l2-ioctl.c
@@ -1471,6 +1471,8 @@ static void v4l_fill_fmtdesc(struct v4l2_fmtdesc *fmt)
case V4L2_META_FMT_C3ISP_STATS: descr = "Amlogic C3 ISP Statistics"; break;
case V4L2_META_FMT_MALI_C55_PARAMS: descr = "ARM Mali-C55 ISP Parameters"; break;
case V4L2_META_FMT_MALI_C55_STATS: descr = "ARM Mali-C55 ISP 3A Statistics"; break;
+ case V4L2_META_FMT_RPP_X1_PARAMS: descr = "Dreamchip RPP-X1 ISP Parameters"; break;
+ case V4L2_META_FMT_RPP_X1_STATS: descr = "Dreamchip RPP-X1 ISP Statistics"; break;
case V4L2_PIX_FMT_NV12_8L128: descr = "NV12 (8x128 Linear)"; break;
case V4L2_PIX_FMT_NV12M_8L128: descr = "NV12M (8x128 Linear)"; break;
case V4L2_PIX_FMT_NV12_10BE_8L128: descr = "10-bit NV12 (8x128 Linear, BE)"; break;
diff --git a/include/uapi/linux/videodev2.h b/include/uapi/linux/videodev2.h
index eda4492e40dc14a90a230601d8e23b0e13845d34..1f78b5378b3bde31a5ec464a6a609fac94e6d0d6 100644
--- a/include/uapi/linux/videodev2.h
+++ b/include/uapi/linux/videodev2.h
@@ -889,6 +889,10 @@ struct v4l2_pix_format {
#define V4L2_META_FMT_MALI_C55_PARAMS v4l2_fourcc('C', '5', '5', 'P') /* ARM Mali-C55 Parameters */
#define V4L2_META_FMT_MALI_C55_STATS v4l2_fourcc('C', '5', '5', 'S') /* ARM Mali-C55 3A Statistics */

+/* Vendor specific - used for Dreamchip RPP-X1 ISP */
+#define V4L2_META_FMT_RPP_X1_PARAMS v4l2_fourcc('D', 'R', '1', 'P') /* Dreamchip RPP-X1 Parameters */
+#define V4L2_META_FMT_RPP_X1_STATS v4l2_fourcc('D', 'R', '1', 'S') /* Dreamchip RPP-X1 Statistics */
+
#ifdef __KERNEL__
/*
* Line-based metadata formats. Remember to update v4l_fill_fmtdesc() when

--
2.53.0