linux-kernel - [PATCH v13 3/7] media: uapi: Add visconti viif meta buffer formats

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Message-Id: <20251016-visconti-viif-v13-3-ceca656b9194@toshiba.co.jp>
Date: Thu, 16 Oct 2025 11:24:40 +0900
From: Yuji Ishikawa <yuji2.ishikawa@...hiba.co.jp>
To: Nobuhiro Iwamatsu <nobuhiro.iwamatsu.x90@...l.toshiba>,
        Yuji Ishikawa <yuji2.ishikawa@...hiba.co.jp>,
        Mauro Carvalho Chehab <mchehab@...nel.org>,
        Rob Herring <robh@...nel.org>,
        Krzysztof Kozlowski <krzk+dt@...nel.org>,
        Conor Dooley <conor+dt@...nel.org>,
        Philipp Zabel <p.zabel@...gutronix.de>
Cc: linux-media@...r.kernel.org, devicetree@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        Laurent Pinchart <laurent.pinchart@...asonboard.com>
Subject: [PATCH v13 3/7] media: uapi: Add visconti viif meta buffer formats

Add the Toshiba Visconti VIIF specific metadata formats.

- V4L2_META_FMT_VISCONTI_VIIF_PARAMS for ISP parameters
- V4L2_META_FMT_VISCONTI_VIIF_STATS for ISP statistics

Signed-off-by: Yuji Ishikawa <yuji2.ishikawa@...hiba.co.jp>
Reviewed-by: Laurent Pinchart <laurent.pinchart@...asonboard.com>
---
Changelog v10:
- add entry for V4L2_META_FMT_VISCONTI_VIIF_PARAMS
- add entry for V4L2_META_FMT_VISCONTI_VIIF_STATS

Changelog v11:
- no change

Changelog v12:
- add description for meta formats at v4l2-ioctl.c

Changelog v13:
- no change
- Capitalize the first letter of the commit message header.
---
 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 01cf52c3ea33..cfc9a8ab66cb 100644
--- a/drivers/media/v4l2-core/v4l2-ioctl.c
+++ b/drivers/media/v4l2-core/v4l2-ioctl.c
@@ -1479,6 +1479,8 @@ static void v4l_fill_fmtdesc(struct v4l2_fmtdesc *fmt)
 	case V4L2_META_FMT_RPI_BE_CFG:	descr = "RPi PiSP BE Config format"; break;
 	case V4L2_META_FMT_RPI_FE_CFG:  descr = "RPi PiSP FE Config format"; break;
 	case V4L2_META_FMT_RPI_FE_STATS: descr = "RPi PiSP FE Statistics format"; break;
+	case V4L2_META_FMT_VISCONTI_VIIF_PARAMS: descr = "Visconti ISP Parameters"; break;
+	case V4L2_META_FMT_VISCONTI_VIIF_STATS: descr = "Visconti ISP Statistics"; break;
 	case V4L2_META_FMT_GENERIC_8:	descr = "8-bit Generic Metadata"; break;
 	case V4L2_META_FMT_GENERIC_CSI2_10:	descr = "8-bit Generic Meta, 10b CSI-2"; break;
 	case V4L2_META_FMT_GENERIC_CSI2_12:	descr = "8-bit Generic Meta, 12b CSI-2"; break;
diff --git a/include/uapi/linux/videodev2.h b/include/uapi/linux/videodev2.h
index becd08fdbddb..980ce7d2da1a 100644
--- a/include/uapi/linux/videodev2.h
+++ b/include/uapi/linux/videodev2.h
@@ -884,6 +884,10 @@ struct v4l2_pix_format {
 #define V4L2_META_FMT_RPI_FE_CFG	v4l2_fourcc('R', 'P', 'F', 'C') /* PiSP FE configuration */
 #define V4L2_META_FMT_RPI_FE_STATS	v4l2_fourcc('R', 'P', 'F', 'S') /* PiSP FE stats */
 
+/* Vendor specific - used for Visconti VIIF sub-system */
+#define V4L2_META_FMT_VISCONTI_VIIF_PARAMS	v4l2_fourcc('V', 'I', 'F', 'P') /* ISP Params */
+#define V4L2_META_FMT_VISCONTI_VIIF_STATS	v4l2_fourcc('V', 'I', 'F', 'S') /* ISP Stats */
+
 #ifdef __KERNEL__
 /*
  * Line-based metadata formats. Remember to update v4l_fill_fmtdesc() when

-- 
2.34.1