linux-kernel - [RFC PATCH 3/3] media: ti: j721e-csi2rx: Add support for VIDIOC_LOG

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Message-ID: <20250212131244.1397722-4-y-abhilashchandra@ti.com>
Date: Wed, 12 Feb 2025 18:42:44 +0530
From: Yemike Abhilash Chandra <y-abhilashchandra@...com>
To: <linux-media@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        <devicetree@...r.kernel.org>
CC: <mripard@...nel.org>, <mchehab@...nel.org>, <jai.luthra@...ux.dev>,
        <robh@...nel.org>, <krzk+dt@...nel.org>, <conor+dt@...nel.org>,
        <devarsht@...com>, <vaishnav.a@...com>, <r-donadkar@...com>,
        <u-kumar1@...com>, <y-abhilashchandra@...com>
Subject: [RFC PATCH 3/3] media: ti: j721e-csi2rx: Add support for VIDIOC_LOG_STATUS

The VIDIOC_LOG_STATUS ioctl outputs the current status of a device to the
kernel log. When this ioctl is called on a video device, the current
implementation queries the log status for all connected subdevices in the
media pipeline.

Signed-off-by: Yemike Abhilash Chandra <y-abhilashchandra@...com>
---
 drivers/media/platform/ti/j721e-csi2rx/j721e-csi2rx.c | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/drivers/media/platform/ti/j721e-csi2rx/j721e-csi2rx.c b/drivers/media/platform/ti/j721e-csi2rx/j721e-csi2rx.c
index 6412a00be8ea..946704458fee 100644
--- a/drivers/media/platform/ti/j721e-csi2rx/j721e-csi2rx.c
+++ b/drivers/media/platform/ti/j721e-csi2rx/j721e-csi2rx.c
@@ -377,6 +377,15 @@ static int ti_csi2rx_enum_framesizes(struct file *file, void *fh,
 	return 0;
 }
 
+static int ti_csi2rx_log_status(struct file *file, void *fh)
+{
+	struct ti_csi2rx_dev *csi = video_drvdata(file);
+
+	v4l2_device_call_all(&csi->v4l2_dev, 0, core, log_status);
+
+	return 0;
+}
+
 static const struct v4l2_ioctl_ops csi_ioctl_ops = {
 	.vidioc_querycap      = ti_csi2rx_querycap,
 	.vidioc_enum_fmt_vid_cap = ti_csi2rx_enum_fmt_vid_cap,
@@ -393,6 +402,7 @@ static const struct v4l2_ioctl_ops csi_ioctl_ops = {
 	.vidioc_expbuf        = vb2_ioctl_expbuf,
 	.vidioc_streamon      = vb2_ioctl_streamon,
 	.vidioc_streamoff     = vb2_ioctl_streamoff,
+	.vidioc_log_status	= ti_csi2rx_log_status,
 };
 
 static const struct v4l2_file_operations csi_fops = {
-- 
2.34.1