linux-kernel - [PATCH 2/2] media: i2c: imx219: Use enable/disable

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Message-Id: <20250304151134.105771-3-tarang.raval@siliconsignals.io>
Date: Tue,  4 Mar 2025 20:41:34 +0530
From: Tarang Raval <tarang.raval@...iconsignals.io>
To: sakari.ailus@...ux.intel.com
Cc: "tarang.raval" <tarang.raval@...iconsignals.io>,
	Dave Stevenson <dave.stevenson@...pberrypi.com>,
	Mauro Carvalho Chehab <mchehab@...nel.org>,
	linux-media@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: [PATCH 2/2] media: i2c: imx219: Use enable/disable_streams callbacks

From: "tarang.raval" <tarang.raval@...iconsignals.io>

Switch from s_stream to enable_streams and disable_streams callbacks.

Signed-off-by: tarang.raval <tarang.raval@...iconsignals.io>
---
 drivers/media/i2c/imx219.c | 49 ++++++++++++++++----------------------
 1 file changed, 21 insertions(+), 28 deletions(-)

diff --git a/drivers/media/i2c/imx219.c b/drivers/media/i2c/imx219.c
index bdb5fd5778a0..9674b0efb4e0 100644
--- a/drivers/media/i2c/imx219.c
+++ b/drivers/media/i2c/imx219.c
@@ -667,12 +667,17 @@ static int imx219_configure_lanes(struct imx219 *imx219)
 			 IMX219_CSI_4_LANE_MODE, NULL);
 };
 
-static int imx219_start_streaming(struct imx219 *imx219,
-				  struct v4l2_subdev_state *state)
+static int imx219_enable_streams(struct v4l2_subdev *sd,
+                                 struct v4l2_subdev_state *state, u32 pad,
+                                 u64 streams_mask)
 {
+	struct imx219 *imx219 = to_imx219(sd);
 	struct i2c_client *client = v4l2_get_subdevdata(&imx219->sd);
 	int ret;
 
+	if (pad != 0)
+	        return -EINVAL;
+
 	ret = pm_runtime_resume_and_get(&client->dev);
 	if (ret < 0)
 		return ret;
@@ -711,48 +716,34 @@ static int imx219_start_streaming(struct imx219 *imx219,
 	if (ret)
 		goto err_rpm_put;
 
-	/* vflip and hflip cannot change during streaming */
-	__v4l2_ctrl_grab(imx219->vflip, true);
-	__v4l2_ctrl_grab(imx219->hflip, true);
-
 	return 0;
 
 err_rpm_put:
-	pm_runtime_put(&client->dev);
+	pm_runtime_mark_last_busy(&client->dev);
+	pm_runtime_put_autosuspend(&client->dev);
 	return ret;
 }
 
-static void imx219_stop_streaming(struct imx219 *imx219)
+static int imx219_disable_streams(struct v4l2_subdev *sd,
+                                  struct v4l2_subdev_state *state, u32 pad,
+                                  u64 streams_mask)
 {
+	struct imx219 *imx219 = to_imx219(sd);
 	struct i2c_client *client = v4l2_get_subdevdata(&imx219->sd);
 	int ret;
 
+	if (pad != 0)
+	        return -EINVAL;
+
 	/* set stream off register */
 	ret = cci_write(imx219->regmap, IMX219_REG_MODE_SELECT,
 			IMX219_MODE_STANDBY, NULL);
 	if (ret)
 		dev_err(&client->dev, "%s failed to set stream\n", __func__);
 
-	__v4l2_ctrl_grab(imx219->vflip, false);
-	__v4l2_ctrl_grab(imx219->hflip, false);
-
-	pm_runtime_put(&client->dev);
-}
-
-static int imx219_set_stream(struct v4l2_subdev *sd, int enable)
-{
-	struct imx219 *imx219 = to_imx219(sd);
-	struct v4l2_subdev_state *state;
-	int ret = 0;
-
-	state = v4l2_subdev_lock_and_get_active_state(sd);
-
-	if (enable)
-		ret = imx219_start_streaming(imx219, state);
-	else
-		imx219_stop_streaming(imx219);
+	pm_runtime_mark_last_busy(&client->dev);
+	pm_runtime_put_autosuspend(&client->dev);
 
-	v4l2_subdev_unlock_state(state);
 	return ret;
 }
 
@@ -922,7 +913,7 @@ static int imx219_init_state(struct v4l2_subdev *sd,
 }
 
 static const struct v4l2_subdev_video_ops imx219_video_ops = {
-	.s_stream = imx219_set_stream,
+	.s_stream = v4l2_subdev_s_stream_helper,
 };
 
 static const struct v4l2_subdev_pad_ops imx219_pad_ops = {
@@ -931,6 +922,8 @@ static const struct v4l2_subdev_pad_ops imx219_pad_ops = {
 	.set_fmt = imx219_set_pad_format,
 	.get_selection = imx219_get_selection,
 	.enum_frame_size = imx219_enum_frame_size,
+	.enable_streams = imx219_enable_streams,
+	.disable_streams = imx219_disable_streams,
 };
 
 static const struct v4l2_subdev_ops imx219_subdev_ops = {
-- 
2.34.1