linux-kernel - [PATCH v1] media: cadence: csi2rx: Add enum_mbus

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Date:   Mon, 11 Dec 2023 01:43:29 -0800
From:   Changhuang Liang <changhuang.liang@...rfivetech.com>
To:     Maxime Ripard <mripard@...nel.org>,
        Mauro Carvalho Chehab <mchehab@...nel.org>
CC:     Jack Zhu <jack.zhu@...rfivetech.com>,
        Changhuang Liang <changhuang.liang@...rfivetech.com>,
        <linux-media@...r.kernel.org>, <linux-kernel@...r.kernel.org>
Subject: [PATCH v1] media: cadence: csi2rx: Add enum_mbus_code pad ops

Add enum_mbus_code ioctl so that user space can know what
formats are supported to csi2rx.

Signed-off-by: Changhuang Liang <changhuang.liang@...rfivetech.com>
---
 drivers/media/platform/cadence/cdns-csi2rx.c | 13 +++++++++++++
 1 file changed, 13 insertions(+)

diff --git a/drivers/media/platform/cadence/cdns-csi2rx.c b/drivers/media/platform/cadence/cdns-csi2rx.c
index 889f4fbbafb3..7788ce0e3171 100644
--- a/drivers/media/platform/cadence/cdns-csi2rx.c
+++ b/drivers/media/platform/cadence/cdns-csi2rx.c
@@ -389,6 +389,18 @@ static int csi2rx_s_stream(struct v4l2_subdev *subdev, int enable)
 	return ret;
 }
 
+static int csi2rx_enum_mbus_code(struct v4l2_subdev *subdev,
+				 struct v4l2_subdev_state *state,
+				 struct v4l2_subdev_mbus_code_enum *code_enum)
+{
+	if (code_enum->index >= ARRAY_SIZE(formats))
+		return -EINVAL;
+
+	code_enum->code = formats[code_enum->index].code;
+
+	return 0;
+}
+
 static int csi2rx_set_fmt(struct v4l2_subdev *subdev,
 			  struct v4l2_subdev_state *state,
 			  struct v4l2_subdev_format *format)
@@ -439,6 +451,7 @@ static int csi2rx_init_cfg(struct v4l2_subdev *subdev,
 }
 
 static const struct v4l2_subdev_pad_ops csi2rx_pad_ops = {
+	.enum_mbus_code	= csi2rx_enum_mbus_code,
 	.get_fmt	= v4l2_subdev_get_fmt,
 	.set_fmt	= csi2rx_set_fmt,
 	.init_cfg	= csi2rx_init_cfg,
-- 
2.25.1