linux-kernel - [RFC v1 07/11] media: Add meta formats supported by NXP neoisp driver

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Message-ID: <20260123080938.3367348-8-antoine.bouyer@nxp.com>
Date: Fri, 23 Jan 2026 09:09:34 +0100
From: Antoine Bouyer <antoine.bouyer@....com>
To: julien.vuillaumier@....com,
	alexi.birlinger@....com,
	daniel.baluta@....com,
	peng.fan@....com,
	frank.li@....com,
	jacopo.mondi@...asonboard.com,
	laurent.pinchart@...asonboard.com,
	mchehab@...nel.org,
	robh@...nel.org,
	krzk+dt@...nel.org,
	conor+dt@...nel.org,
	shawnguo@...nel.org,
	s.hauer@...gutronix.de,
	kernel@...gutronix.de,
	festevam@...il.com
Cc: linux-kernel@...r.kernel.org,
	linux-media@...r.kernel.org,
	devicetree@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org,
	Antoine Bouyer <antoine.bouyer@....com>
Subject: [RFC v1 07/11] media: Add meta formats supported by NXP neoisp driver

This patch adds new v4l2 meta formats definitions and descriptions used by
neoisp driver for the parameters and statistics buffers:
 - `V4L2_META_FMT_NEO_ISP_PARAMS` used for the legacy fixed-size
parameters buffer structure.
 - `V4L2_META_FMT_NEO_ISP_EXT_PARAMS` used for the generic v4l2-isp
extensible parameters structure, supporting a non-fixed-size buffer and
changeable ISP configuration blocks.
 - `V4L2_META_FMT_NEO_ISP_STATS` used for the legacy fixed-size statistics
buffer structure.
 - `V4L2_META_FMT_NEO_ISP_EXT_STATS` used for the generic v4l2-isp
extensible statistics structure, supporting a non-fixed-size buffer
and changeable ISP statistics blocks.

Signed-off-by: Antoine Bouyer <antoine.bouyer@....com>
---
 drivers/media/v4l2-core/v4l2-ioctl.c | 4 ++++
 include/uapi/linux/videodev2.h       | 6 ++++++
 2 files changed, 10 insertions(+)

diff --git a/drivers/media/v4l2-core/v4l2-ioctl.c b/drivers/media/v4l2-core/v4l2-ioctl.c
index 37d33d4a363d..c797cf11be38 100644
--- a/drivers/media/v4l2-core/v4l2-ioctl.c
+++ b/drivers/media/v4l2-core/v4l2-ioctl.c
@@ -1471,6 +1471,10 @@ 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_NEO_ISP_PARAMS:	descr = "NXP Neo ISP 3A Parameters"; break;
+	case V4L2_META_FMT_NEO_ISP_EXT_PARAMS:	descr = "NXP Neo ISP ext 3A Parameters"; break;
+	case V4L2_META_FMT_NEO_ISP_STATS:	descr = "NXP Neo ISP 3A Statistics"; break;
+	case V4L2_META_FMT_NEO_ISP_EXT_STATS:	descr = "NXP Neo ISP ext 3A 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 848e86617d5c..5f4992452c66 100644
--- a/include/uapi/linux/videodev2.h
+++ b/include/uapi/linux/videodev2.h
@@ -889,6 +889,12 @@ 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 NXP NEOISP sub-system */
+#define V4L2_META_FMT_NEO_ISP_PARAMS		v4l2_fourcc('N', 'N', 'I', 'P') /* NXP NEOISP Parameters */
+#define V4L2_META_FMT_NEO_ISP_EXT_PARAMS	v4l2_fourcc('N', 'N', 'E', 'P') /* NXP NEOISP Ext Params */
+#define V4L2_META_FMT_NEO_ISP_STATS		v4l2_fourcc('N', 'N', 'I', 'S') /* NXP NEOISP Statistics */
+#define V4L2_META_FMT_NEO_ISP_EXT_STATS		v4l2_fourcc('N', 'N', 'E', 'S') /* NXP NEOISP Ext Stats */
+
 #ifdef __KERNEL__
 /*
  * Line-based metadata formats. Remember to update v4l_fill_fmtdesc() when
-- 
2.52.0