openwrt/target/linux/bcm27xx/patches-5.15/950-0522-media-i2c-imx519-Advertise-embedded-data-node-on-med.patch

From 16a061b6cf7229db782615393f020d723640da69 Mon Sep 17 00:00:00 2001
From: Arducam <admin@arducam.com>
Date: Wed, 15 Sep 2021 09:02:08 +0800
Subject: [PATCH] media: i2c: imx519: Advertise embedded data node on
 media pad 1

This commit updates the imx519 driver to adverise support for embedded
data streams.

The imx519 sensor subdevice overloads the media pad to differentiate
between image stream (pad 0) and embedded data stream (pad 1) when
performing the v4l2_subdev_pad_ops functions.

Signed-off-by: Lee Jackson <info@arducam.com>
---
 drivers/media/i2c/imx519.c | 138 +++++++++++++++++++++++++++----------
 1 file changed, 103 insertions(+), 35 deletions(-)

--- a/drivers/media/i2c/imx519.c
+++ b/drivers/media/i2c/imx519.c
@@ -93,6 +93,16 @@
 #define IMX519_TEST_PATTERN_B_DEFAULT	0
 #define IMX519_TEST_PATTERN_GB_DEFAULT	0
 
+/* Embedded metadata stream structure */
+#define IMX519_EMBEDDED_LINE_WIDTH 16384
+#define IMX519_NUM_EMBEDDED_LINES 1
+
+enum pad_types {
+	IMAGE_PAD,
+	METADATA_PAD,
+	NUM_PADS
+};
+
 /* IMX519 native and active pixel array size. */
 #define IMX519_NATIVE_WIDTH		4672U
 #define IMX519_NATIVE_HEIGHT		3648U
@@ -970,7 +980,7 @@ static const char * const imx519_supply_
 
 struct imx519 {
 	struct v4l2_subdev sd;
-	struct media_pad pad;
+	struct media_pad pad[NUM_PADS];
 
 	unsigned int fmt_code;
 
@@ -1101,7 +1111,9 @@ static int imx519_open(struct v4l2_subde
 {
 	struct imx519 *imx519 = to_imx519(sd);
 	struct v4l2_mbus_framefmt *try_fmt_img =
-		v4l2_subdev_get_try_format(sd, fh->state, 0);
+		v4l2_subdev_get_try_format(sd, fh->state, IMAGE_PAD);
+	struct v4l2_mbus_framefmt *try_fmt_meta =
+		v4l2_subdev_get_try_format(sd, fh->state, METADATA_PAD);
 	struct v4l2_rect *try_crop;
 
 	mutex_lock(&imx519->mutex);
@@ -1112,8 +1124,14 @@ static int imx519_open(struct v4l2_subde
 	try_fmt_img->code = imx519_get_format_code(imx519);
 	try_fmt_img->field = V4L2_FIELD_NONE;
 
+	/* Initialize try_fmt for the embedded metadata pad */
+	try_fmt_meta->width = IMX519_EMBEDDED_LINE_WIDTH;
+	try_fmt_meta->height = IMX519_NUM_EMBEDDED_LINES;
+	try_fmt_meta->code = MEDIA_BUS_FMT_SENSOR_DATA;
+	try_fmt_meta->field = V4L2_FIELD_NONE;
+
 	/* Initialize try_crop */
-	try_crop = v4l2_subdev_get_try_crop(sd, fh->state, 0);
+	try_crop = v4l2_subdev_get_try_crop(sd, fh->state, IMAGE_PAD);
 	try_crop->left = IMX519_PIXEL_ARRAY_LEFT;
 	try_crop->top = IMX519_PIXEL_ARRAY_TOP;
 	try_crop->width = IMX519_PIXEL_ARRAY_WIDTH;
@@ -1246,10 +1264,20 @@ static int imx519_enum_mbus_code(struct
 {
 	struct imx519 *imx519 = to_imx519(sd);
 
-	if (code->index > 0)
+	if (code->pad >= NUM_PADS)
 		return -EINVAL;
 
-	code->code = imx519_get_format_code(imx519);
+	if (code->pad == IMAGE_PAD) {
+		if (code->index > 0)
+			return -EINVAL;
+
+		code->code = imx519_get_format_code(imx519);
+	} else {
+		if (code->index > 0)
+			return -EINVAL;
+
+		code->code = MEDIA_BUS_FMT_SENSOR_DATA;
+	}
 
 	return 0;
 }
@@ -1260,16 +1288,29 @@ static int imx519_enum_frame_size(struct
 {
 	struct imx519 *imx519 = to_imx519(sd);
 
-	if (fse->index >= ARRAY_SIZE(supported_modes_10bit))
+	if (fse->pad >= NUM_PADS)
 		return -EINVAL;
 
-	if (fse->code != imx519_get_format_code(imx519))
-		return -EINVAL;
+	if (fse->pad == IMAGE_PAD) {
+		if (fse->index >= ARRAY_SIZE(supported_modes_10bit))
+			return -EINVAL;
+
+		if (fse->code != imx519_get_format_code(imx519))
+			return -EINVAL;
+
+		fse->min_width = supported_modes_10bit[fse->index].width;
+		fse->max_width = fse->min_width;
+		fse->min_height = supported_modes_10bit[fse->index].height;
+		fse->max_height = fse->min_height;
+	} else {
+		if (fse->code != MEDIA_BUS_FMT_SENSOR_DATA || fse->index > 0)
+			return -EINVAL;
 
-	fse->min_width = supported_modes_10bit[fse->index].width;
-	fse->max_width = fse->min_width;
-	fse->min_height = supported_modes_10bit[fse->index].height;
-	fse->max_height = fse->min_height;
+		fse->min_width = IMX519_EMBEDDED_LINE_WIDTH;
+		fse->max_width = fse->min_width;
+		fse->min_height = IMX519_NUM_EMBEDDED_LINES;
+		fse->max_height = fse->min_height;
+	}
 
 	return 0;
 }
@@ -1294,13 +1335,21 @@ static void imx519_update_image_pad_form
 	imx519_reset_colorspace(&fmt->format);
 }
 
+static void imx519_update_metadata_pad_format(struct v4l2_subdev_format *fmt)
+{
+	fmt->format.width = IMX519_EMBEDDED_LINE_WIDTH;
+	fmt->format.height = IMX519_NUM_EMBEDDED_LINES;
+	fmt->format.code = MEDIA_BUS_FMT_SENSOR_DATA;
+	fmt->format.field = V4L2_FIELD_NONE;
+}
+
 static int imx519_get_pad_format(struct v4l2_subdev *sd,
 				 struct v4l2_subdev_state *sd_state,
 				 struct v4l2_subdev_format *fmt)
 {
 	struct imx519 *imx519 = to_imx519(sd);
 
-	if (fmt->pad != 0)
+	if (fmt->pad >= NUM_PADS)
 		return -EINVAL;
 
 	mutex_lock(&imx519->mutex);
@@ -1310,12 +1359,19 @@ static int imx519_get_pad_format(struct
 			v4l2_subdev_get_try_format(&imx519->sd, sd_state,
 						   fmt->pad);
 		/* update the code which could change due to vflip or hflip: */
-		try_fmt->code = imx519_get_format_code(imx519);
+		try_fmt->code = fmt->pad == IMAGE_PAD ?
+				imx519_get_format_code(imx519) :
+				MEDIA_BUS_FMT_SENSOR_DATA;
 		fmt->format = *try_fmt;
 	} else {
-		imx519_update_image_pad_format(imx519, imx519->mode,
-					       fmt);
-		fmt->format.code = imx519_get_format_code(imx519);
+		if (fmt->pad == IMAGE_PAD) {
+			imx519_update_image_pad_format(imx519, imx519->mode,
+						       fmt);
+			fmt->format.code =
+			       imx519_get_format_code(imx519);
+		} else {
+			imx519_update_metadata_pad_format(fmt);
+		}
 	}
 
 	mutex_unlock(&imx519->mutex);
@@ -1376,28 +1432,39 @@ static int imx519_set_pad_format(struct
 	const struct imx519_mode *mode;
 	struct imx519 *imx519 = to_imx519(sd);
 
-	if (fmt->pad != 0)
+	if (fmt->pad >= NUM_PADS)
 		return -EINVAL;
 
 	mutex_lock(&imx519->mutex);
 
-	/* Bayer order varies with flips */
-	fmt->format.code = imx519_get_format_code(imx519);
+	if (fmt->pad == IMAGE_PAD) {
+		/* Bayer order varies with flips */
+		fmt->format.code = imx519_get_format_code(imx519);
 
-	mode = v4l2_find_nearest_size(supported_modes_10bit,
-				      ARRAY_SIZE(supported_modes_10bit),
-				      width, height,
-				      fmt->format.width,
-				      fmt->format.height);
-	imx519_update_image_pad_format(imx519, mode, fmt);
-	if (fmt->which == V4L2_SUBDEV_FORMAT_TRY) {
-		framefmt = v4l2_subdev_get_try_format(sd, sd_state,
-						      fmt->pad);
-		*framefmt = fmt->format;
+		mode = v4l2_find_nearest_size(supported_modes_10bit,
+					      ARRAY_SIZE(supported_modes_10bit),
+					      width, height,
+					      fmt->format.width,
+					      fmt->format.height);
+		imx519_update_image_pad_format(imx519, mode, fmt);
+		if (fmt->which == V4L2_SUBDEV_FORMAT_TRY) {
+			framefmt = v4l2_subdev_get_try_format(sd, sd_state,
+							      fmt->pad);
+			*framefmt = fmt->format;
+		} else {
+			imx519->mode = mode;
+			imx519->fmt_code = fmt->format.code;
+			imx519_set_framing_limits(imx519);
+		}
 	} else {
-		imx519->mode = mode;
-		imx519->fmt_code = fmt->format.code;
-		imx519_set_framing_limits(imx519);
+		if (fmt->which == V4L2_SUBDEV_FORMAT_TRY) {
+			framefmt = v4l2_subdev_get_try_format(sd, sd_state,
+							      fmt->pad);
+			*framefmt = fmt->format;
+		} else {
+			/* Only one embedded data mode is supported */
+			imx519_update_metadata_pad_format(fmt);
+		}
 	}
 
 	mutex_unlock(&imx519->mutex);
@@ -1953,9 +2020,10 @@ static int imx519_probe(struct i2c_clien
 	imx519->sd.entity.function = MEDIA_ENT_F_CAM_SENSOR;
 
 	/* Initialize source pads */
-	imx519->pad.flags = MEDIA_PAD_FL_SOURCE;
+	imx519->pad[IMAGE_PAD].flags = MEDIA_PAD_FL_SOURCE;
+	imx519->pad[METADATA_PAD].flags = MEDIA_PAD_FL_SOURCE;
 
-	ret = media_entity_pads_init(&imx519->sd.entity, 1, &imx519->pad);
+	ret = media_entity_pads_init(&imx519->sd.entity, NUM_PADS, imx519->pad);
 	if (ret) {
 		dev_err(dev, "failed to init entity pads: %d\n", ret);
 		goto error_handler_free;