linux-kernel - [PATCH 2/5] media/i2c: max96717: implement the .get_frame

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Message-Id: <20250207112958.2571600-3-laurentiu.palcu@oss.nxp.com>
Date: Fri,  7 Feb 2025 13:29:54 +0200
From: Laurentiu Palcu <laurentiu.palcu@....nxp.com>
To: Julien Massot <julien.massot@...labora.com>,
	Mauro Carvalho Chehab <mchehab@...nel.org>
Cc: Laurentiu Palcu <laurentiu.palcu@....nxp.com>,
	linux-kernel@...r.kernel.org,
	linux-media@...r.kernel.org
Subject: [PATCH 2/5] media/i2c: max96717: implement the .get_frame_desc() operation

Since the max96717 serializer can work with various sensors, we need to
implement the .get_frame_desc() callback to get the VCs and DTs for the
incoming stream(s).

Signed-off-by: Laurentiu Palcu <laurentiu.palcu@....nxp.com>
---
 drivers/media/i2c/max96717.c | 21 +++++++++++++++++++++
 1 file changed, 21 insertions(+)

diff --git a/drivers/media/i2c/max96717.c b/drivers/media/i2c/max96717.c
index b1116aade0687..6a668a004c717 100644
--- a/drivers/media/i2c/max96717.c
+++ b/drivers/media/i2c/max96717.c
@@ -575,12 +575,33 @@ static int max96717_disable_streams(struct v4l2_subdev *sd,
 	return 0;
 }
 
+static int max96717_get_frame_desc(struct v4l2_subdev *sd, unsigned int pad,
+				   struct v4l2_mbus_frame_desc *fd)
+{
+	struct max96717_priv *priv = sd_to_max96717(sd);
+	int ret;
+	struct v4l2_mbus_frame_desc source_fd;
+
+	if (pad != MAX96717_PAD_SOURCE)
+		return -EINVAL;
+
+	ret = v4l2_subdev_call(priv->source_sd, pad, get_frame_desc,
+			       priv->source_sd_pad, &source_fd);
+	if (ret)
+		return ret;
+
+	*fd = source_fd;
+
+	return 0;
+}
+
 static const struct v4l2_subdev_pad_ops max96717_pad_ops = {
 	.enable_streams = max96717_enable_streams,
 	.disable_streams = max96717_disable_streams,
 	.set_routing = max96717_set_routing,
 	.get_fmt = v4l2_subdev_get_fmt,
 	.set_fmt = max96717_set_fmt,
+	.get_frame_desc = max96717_get_frame_desc,
 };
 
 static const struct v4l2_subdev_core_ops max96717_subdev_core_ops = {
-- 
2.34.1