media: stm32-dcmi: improve sensor subdev naming

Rename "subdev" entity struct field to "source"
to prepare for several subdev support.
Move asd field on top of entity struct.
Acked-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Hugues Fruchet <hugues.fruchet@st.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>

drivers/media/platform/stm32/stm32-dcmi.c

@@ -100,10 +100,10 @@ enum state {
 #define OVERRUN_ERROR_THRESHOLD	3
 
 struct dcmi_graph_entity {
-	struct device_node *node;
-
 	struct v4l2_async_subdev asd;
-	struct v4l2_subdev *subdev;
+
+	struct device_node *remote_node;
+	struct v4l2_subdev *source;
 };
 
 struct dcmi_format {
@@ -595,7 +595,7 @@ static int dcmi_start_streaming(struct vb2_queue *vq, unsigned int count)
 	}
 
 	/* Enable stream on the sub device */
-	ret = v4l2_subdev_call(dcmi->entity.subdev, video, s_stream, 1);
+	ret = v4l2_subdev_call(dcmi->entity.source, video, s_stream, 1);
 	if (ret && ret != -ENOIOCTLCMD) {
 		dev_err(dcmi->dev, "%s: Failed to start streaming, subdev streamon error",
 			__func__);
@@ -685,7 +685,7 @@ static int dcmi_start_streaming(struct vb2_queue *vq, unsigned int count)
 	return 0;
 
 err_subdev_streamoff:
-	v4l2_subdev_call(dcmi->entity.subdev, video, s_stream, 0);
+	v4l2_subdev_call(dcmi->entity.source, video, s_stream, 0);
 
 err_pm_put:
 	pm_runtime_put(dcmi->dev);
@@ -713,7 +713,7 @@ static void dcmi_stop_streaming(struct vb2_queue *vq)
 	int ret;
 
 	/* Disable stream on the sub device */
-	ret = v4l2_subdev_call(dcmi->entity.subdev, video, s_stream, 0);
+	ret = v4l2_subdev_call(dcmi->entity.source, video, s_stream, 0);
 	if (ret && ret != -ENOIOCTLCMD)
 		dev_err(dcmi->dev, "%s: Failed to stop streaming, subdev streamoff error (%d)\n",
 			__func__, ret);
@@ -857,7 +857,7 @@ static int dcmi_try_fmt(struct stm32_dcmi *dcmi, struct v4l2_format *f,
 	}
 
 	v4l2_fill_mbus_format(&format.format, pix, sd_fmt->mbus_code);
-	ret = v4l2_subdev_call(dcmi->entity.subdev, pad, set_fmt,
+	ret = v4l2_subdev_call(dcmi->entity.source, pad, set_fmt,
 			       &pad_cfg, &format);
 	if (ret < 0)
 		return ret;
@@ -934,7 +934,7 @@ static int dcmi_set_fmt(struct stm32_dcmi *dcmi, struct v4l2_format *f)
 	mf->width = sd_framesize.width;
 	mf->height = sd_framesize.height;
 
-	ret = v4l2_subdev_call(dcmi->entity.subdev, pad,
+	ret = v4l2_subdev_call(dcmi->entity.source, pad,
 			       set_fmt, NULL, &format);
 	if (ret < 0)
 		return ret;
@@ -991,7 +991,7 @@ static int dcmi_get_sensor_format(struct stm32_dcmi *dcmi,
 	};
 	int ret;
 
-	ret = v4l2_subdev_call(dcmi->entity.subdev, pad, get_fmt, NULL, &fmt);
+	ret = v4l2_subdev_call(dcmi->entity.source, pad, get_fmt, NULL, &fmt);
 	if (ret)
 		return ret;
 
@@ -1020,7 +1020,7 @@ static int dcmi_set_sensor_format(struct stm32_dcmi *dcmi,
 	}
 
 	v4l2_fill_mbus_format(&format.format, pix, sd_fmt->mbus_code);
-	ret = v4l2_subdev_call(dcmi->entity.subdev, pad, set_fmt,
+	ret = v4l2_subdev_call(dcmi->entity.source, pad, set_fmt,
 			       &pad_cfg, &format);
 	if (ret < 0)
 		return ret;
@@ -1043,7 +1043,7 @@ static int dcmi_get_sensor_bounds(struct stm32_dcmi *dcmi,
 	/*
 	 * Get sensor bounds first
 	 */
-	ret = v4l2_subdev_call(dcmi->entity.subdev, pad, get_selection,
+	ret = v4l2_subdev_call(dcmi->entity.source, pad, get_selection,
 			       NULL, &bounds);
 	if (!ret)
 		*r = bounds.r;
@@ -1224,7 +1224,7 @@ static int dcmi_enum_framesizes(struct file *file, void *fh,
 
 	fse.code = sd_fmt->mbus_code;
 
-	ret = v4l2_subdev_call(dcmi->entity.subdev, pad, enum_frame_size,
+	ret = v4l2_subdev_call(dcmi->entity.source, pad, enum_frame_size,
 			       NULL, &fse);
 	if (ret)
 		return ret;
@@ -1241,7 +1241,7 @@ static int dcmi_g_parm(struct file *file, void *priv,
 {
 	struct stm32_dcmi *dcmi = video_drvdata(file);
 
-	return v4l2_g_parm_cap(video_devdata(file), dcmi->entity.subdev, p);
+	return v4l2_g_parm_cap(video_devdata(file), dcmi->entity.source, p);
 }
 
 static int dcmi_s_parm(struct file *file, void *priv,
@@ -1249,7 +1249,7 @@ static int dcmi_s_parm(struct file *file, void *priv,
 {
 	struct stm32_dcmi *dcmi = video_drvdata(file);
 
-	return v4l2_s_parm_cap(video_devdata(file), dcmi->entity.subdev, p);
+	return v4l2_s_parm_cap(video_devdata(file), dcmi->entity.source, p);
 }
 
 static int dcmi_enum_frameintervals(struct file *file, void *fh,
@@ -1271,7 +1271,7 @@ static int dcmi_enum_frameintervals(struct file *file, void *fh,
 
 	fie.code = sd_fmt->mbus_code;
 
-	ret = v4l2_subdev_call(dcmi->entity.subdev, pad,
+	ret = v4l2_subdev_call(dcmi->entity.source, pad,
 			       enum_frame_interval, NULL, &fie);
 	if (ret)
 		return ret;
@@ -1291,7 +1291,7 @@ MODULE_DEVICE_TABLE(of, stm32_dcmi_of_match);
 static int dcmi_open(struct file *file)
 {
 	struct stm32_dcmi *dcmi = video_drvdata(file);
-	struct v4l2_subdev *sd = dcmi->entity.subdev;
+	struct v4l2_subdev *sd = dcmi->entity.source;
 	int ret;
 
 	if (mutex_lock_interruptible(&dcmi->lock))
@@ -1322,7 +1322,7 @@ static int dcmi_open(struct file *file)
 static int dcmi_release(struct file *file)
 {
 	struct stm32_dcmi *dcmi = video_drvdata(file);
-	struct v4l2_subdev *sd = dcmi->entity.subdev;
+	struct v4l2_subdev *sd = dcmi->entity.source;
 	bool fh_singular;
 	int ret;
 
@@ -1433,7 +1433,7 @@ static int dcmi_formats_init(struct stm32_dcmi *dcmi)
 {
 	const struct dcmi_format *sd_fmts[ARRAY_SIZE(dcmi_formats)];
 	unsigned int num_fmts = 0, i, j;
-	struct v4l2_subdev *subdev = dcmi->entity.subdev;
+	struct v4l2_subdev *subdev = dcmi->entity.source;
 	struct v4l2_subdev_mbus_code_enum mbus_code = {
 		.which = V4L2_SUBDEV_FORMAT_ACTIVE,
 	};
@@ -1479,7 +1479,7 @@ static int dcmi_formats_init(struct stm32_dcmi *dcmi)
 static int dcmi_framesizes_init(struct stm32_dcmi *dcmi)
 {
 	unsigned int num_fsize = 0;
-	struct v4l2_subdev *subdev = dcmi->entity.subdev;
+	struct v4l2_subdev *subdev = dcmi->entity.source;
 	struct v4l2_subdev_frame_size_enum fse = {
 		.which = V4L2_SUBDEV_FORMAT_ACTIVE,
 		.code = dcmi->sd_format->mbus_code,
@@ -1526,7 +1526,7 @@ static int dcmi_graph_notify_complete(struct v4l2_async_notifier *notifier)
 	struct stm32_dcmi *dcmi = notifier_to_dcmi(notifier);
 	int ret;
 
-	dcmi->vdev->ctrl_handler = dcmi->entity.subdev->ctrl_handler;
+	dcmi->vdev->ctrl_handler = dcmi->entity.source->ctrl_handler;
 	ret = dcmi_formats_init(dcmi);
 	if (ret) {
 		dev_err(dcmi->dev, "No supported mediabus format found\n");
@@ -1582,7 +1582,7 @@ static int dcmi_graph_notify_bound(struct v4l2_async_notifier *notifier,
 
 	dev_dbg(dcmi->dev, "Subdev %s bound\n", subdev->name);
 
-	dcmi->entity.subdev = subdev;
+	dcmi->entity.source = subdev;
 
 	return 0;
 }
@@ -1608,7 +1608,7 @@ static int dcmi_graph_parse(struct stm32_dcmi *dcmi, struct device_node *node)
 		return -EINVAL;
 
 	/* Remote node to connect */
-	dcmi->entity.node = remote;
+	dcmi->entity.remote_node = remote;
 	dcmi->entity.asd.match_type = V4L2_ASYNC_MATCH_FWNODE;
 	dcmi->entity.asd.match.fwnode = of_fwnode_handle(remote);
 	return 0;
@@ -1631,7 +1631,7 @@ static int dcmi_graph_init(struct stm32_dcmi *dcmi)
 					     &dcmi->entity.asd);
 	if (ret) {
 		dev_err(dcmi->dev, "Failed to add subdev notifier\n");
-		of_node_put(dcmi->entity.node);
+		of_node_put(dcmi->entity.remote_node);
 		return ret;
 	}