openwrt/target/linux/bcm27xx/patches-5.15/950-0602-media-imx219-Advertise-embedded-data-node-on-media-p.patch

From c144d907a9067f948706a4cb8709672b0708c4c4 Mon Sep 17 00:00:00 2001
From: Naushir Patuck <naush@raspberrypi.com>
Date: Wed, 8 Dec 2021 13:22:48 +0100
Subject: [PATCH]  media: imx219: Advertise embedded data node on media
 pad 1

This commit updates the imx219 driver to adverise support for embedded
data streams.  This can then be used by the bcm2835-unicam driver, which
has recently been updated to expose the embedded data stream to
userland.

The imx219 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: Naushir Patuck <naush@raspberrypi.com>
[JMH: Adapt to the mainline 5.16 kernel]
Signed-off-by: Jean-Michel Hautbois <jeanmichel.hautbois@ideasonboard.com>
---
 drivers/media/i2c/imx219.c | 254 ++++++++++++++++++++++++-------------
 1 file changed, 169 insertions(+), 85 deletions(-)

--- a/drivers/media/i2c/imx219.c
+++ b/drivers/media/i2c/imx219.c
@@ -124,6 +124,16 @@
 #define IMX219_PIXEL_ARRAY_WIDTH	3280U
 #define IMX219_PIXEL_ARRAY_HEIGHT	2464U
 
+/* Embedded metadata stream structure */
+#define IMX219_EMBEDDED_LINE_WIDTH 16384
+#define IMX219_NUM_EMBEDDED_LINES 1
+
+enum pad_types {
+	IMAGE_PAD,
+	METADATA_PAD,
+	NUM_PADS
+};
+
 struct imx219_reg {
 	u16 address;
 	u8 val;
@@ -448,7 +458,7 @@ static const struct imx219_mode supporte
 
 struct imx219 {
 	struct v4l2_subdev sd;
-	struct media_pad pad;
+	struct media_pad pad[NUM_PADS];
 
 	struct v4l2_mbus_framefmt fmt;
 
@@ -598,18 +608,26 @@ static void imx219_set_default_format(st
 static int imx219_open(struct v4l2_subdev *sd, struct v4l2_subdev_fh *fh)
 {
 	struct imx219 *imx219 = to_imx219(sd);
-	struct v4l2_mbus_framefmt *try_fmt =
-		v4l2_subdev_get_try_format(sd, fh->state, 0);
+	struct v4l2_mbus_framefmt *try_fmt_img =
+		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(&imx219->mutex);
 
-	/* Initialize try_fmt */
-	try_fmt->width = supported_modes[0].width;
-	try_fmt->height = supported_modes[0].height;
-	try_fmt->code = imx219_get_format_code(imx219,
-					       MEDIA_BUS_FMT_SRGGB10_1X10);
-	try_fmt->field = V4L2_FIELD_NONE;
+	/* Initialize try_fmt for the image pad */
+	try_fmt_img->width = supported_modes[0].width;
+	try_fmt_img->height = supported_modes[0].height;
+	try_fmt_img->code = imx219_get_format_code(imx219,
+						   MEDIA_BUS_FMT_SRGGB10_1X10);
+	try_fmt_img->field = V4L2_FIELD_NONE;
+
+	/* Initialize try_fmt for the embedded metadata pad */
+	try_fmt_meta->width = IMX219_EMBEDDED_LINE_WIDTH;
+	try_fmt_meta->height = IMX219_NUM_EMBEDDED_LINES;
+	try_fmt_meta->code = MEDIA_BUS_FMT_SENSOR_DATA;
+	try_fmt_meta->field = V4L2_FIELD_NONE;
 
 	/* Initialize try_crop rectangle. */
 	try_crop = v4l2_subdev_get_try_crop(sd, fh->state, 0);
@@ -718,12 +736,21 @@ static int imx219_enum_mbus_code(struct
 {
 	struct imx219 *imx219 = to_imx219(sd);
 
-	if (code->index >= (ARRAY_SIZE(codes) / 4))
+	if (code->pad >= NUM_PADS)
 		return -EINVAL;
 
-	mutex_lock(&imx219->mutex);
-	code->code = imx219_get_format_code(imx219, codes[code->index * 4]);
-	mutex_unlock(&imx219->mutex);
+	if (code->pad == IMAGE_PAD) {
+		if (code->index >= (ARRAY_SIZE(codes) / 4))
+			return -EINVAL;
+
+		code->code = imx219_get_format_code(imx219,
+						    codes[code->index * 4]);
+	} else {
+		if (code->index > 0)
+			return -EINVAL;
+
+		code->code = MEDIA_BUS_FMT_SENSOR_DATA;
+	}
 
 	return 0;
 }
@@ -733,21 +760,30 @@ static int imx219_enum_frame_size(struct
 				  struct v4l2_subdev_frame_size_enum *fse)
 {
 	struct imx219 *imx219 = to_imx219(sd);
-	u32 code;
 
-	if (fse->index >= ARRAY_SIZE(supported_modes))
+	if (fse->pad >= NUM_PADS)
 		return -EINVAL;
 
-	mutex_lock(&imx219->mutex);
-	code = imx219_get_format_code(imx219, fse->code);
-	mutex_unlock(&imx219->mutex);
-	if (fse->code != code)
-		return -EINVAL;
+	if (fse->pad == IMAGE_PAD) {
+		if (fse->index >= ARRAY_SIZE(supported_modes))
+			return -EINVAL;
+
+		if (fse->code != imx219_get_format_code(imx219, fse->code))
+			return -EINVAL;
+
+		fse->min_width = supported_modes[fse->index].width;
+		fse->max_width = fse->min_width;
+		fse->min_height = supported_modes[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[fse->index].width;
-	fse->max_width = fse->min_width;
-	fse->min_height = supported_modes[fse->index].height;
-	fse->max_height = fse->min_height;
+		fse->min_width = IMX219_EMBEDDED_LINE_WIDTH;
+		fse->max_width = fse->min_width;
+		fse->min_height = IMX219_NUM_EMBEDDED_LINES;
+		fse->max_height = fse->min_height;
+	}
 
 	return 0;
 }
@@ -762,9 +798,9 @@ static void imx219_reset_colorspace(stru
 	fmt->xfer_func = V4L2_MAP_XFER_FUNC_DEFAULT(fmt->colorspace);
 }
 
-static void imx219_update_pad_format(struct imx219 *imx219,
-				     const struct imx219_mode *mode,
-				     struct v4l2_subdev_format *fmt)
+static void imx219_update_image_pad_format(struct imx219 *imx219,
+					   const struct imx219_mode *mode,
+					   struct v4l2_subdev_format *fmt)
 {
 	fmt->format.width = mode->width;
 	fmt->format.height = mode->height;
@@ -772,21 +808,39 @@ static void imx219_update_pad_format(str
 	imx219_reset_colorspace(&fmt->format);
 }
 
+static void imx219_update_metadata_pad_format(struct v4l2_subdev_format *fmt)
+{
+	fmt->format.width = IMX219_EMBEDDED_LINE_WIDTH;
+	fmt->format.height = IMX219_NUM_EMBEDDED_LINES;
+	fmt->format.code = MEDIA_BUS_FMT_SENSOR_DATA;
+	fmt->format.field = V4L2_FIELD_NONE;
+}
+
 static int __imx219_get_pad_format(struct imx219 *imx219,
 				   struct v4l2_subdev_state *sd_state,
 				   struct v4l2_subdev_format *fmt)
 {
+	if (fmt->pad >= NUM_PADS)
+		return -EINVAL;
+
 	if (fmt->which == V4L2_SUBDEV_FORMAT_TRY) {
 		struct v4l2_mbus_framefmt *try_fmt =
 			v4l2_subdev_get_try_format(&imx219->sd, sd_state,
 						   fmt->pad);
 		/* update the code which could change due to vflip or hflip: */
-		try_fmt->code = imx219_get_format_code(imx219, try_fmt->code);
+		try_fmt->code = fmt->pad == IMAGE_PAD ?
+				imx219_get_format_code(imx219, try_fmt->code) :
+				MEDIA_BUS_FMT_SENSOR_DATA;
 		fmt->format = *try_fmt;
 	} else {
-		imx219_update_pad_format(imx219, imx219->mode, fmt);
-		fmt->format.code = imx219_get_format_code(imx219,
-							  imx219->fmt.code);
+		if (fmt->pad == IMAGE_PAD) {
+			imx219_update_image_pad_format(imx219, imx219->mode,
+						       fmt);
+			fmt->format.code = imx219_get_format_code(imx219,
+							      imx219->fmt.code);
+		} else {
+			imx219_update_metadata_pad_format(fmt);
+		}
 	}
 
 	return 0;
@@ -816,51 +870,74 @@ static int imx219_set_pad_format(struct
 	int exposure_max, exposure_def, hblank;
 	unsigned int i;
 
-	mutex_lock(&imx219->mutex);
-
-	for (i = 0; i < ARRAY_SIZE(codes); i++)
-		if (codes[i] == fmt->format.code)
-			break;
-	if (i >= ARRAY_SIZE(codes))
-		i = 0;
+	if (fmt->pad >= NUM_PADS)
+		return -EINVAL;
 
-	/* Bayer order varies with flips */
-	fmt->format.code = imx219_get_format_code(imx219, codes[i]);
+	mutex_lock(&imx219->mutex);
 
-	mode = v4l2_find_nearest_size(supported_modes,
-				      ARRAY_SIZE(supported_modes),
-				      width, height,
-				      fmt->format.width, fmt->format.height);
-	imx219_update_pad_format(imx219, mode, fmt);
-	if (fmt->which == V4L2_SUBDEV_FORMAT_TRY) {
-		framefmt = v4l2_subdev_get_try_format(sd, sd_state, fmt->pad);
-		*framefmt = fmt->format;
-	} else if (imx219->mode != mode ||
-		   imx219->fmt.code != fmt->format.code) {
-		imx219->fmt = fmt->format;
-		imx219->mode = mode;
-		/* Update limits and set FPS to default */
-		__v4l2_ctrl_modify_range(imx219->vblank, IMX219_VBLANK_MIN,
-					 IMX219_VTS_MAX - mode->height, 1,
-					 mode->vts_def - mode->height);
-		__v4l2_ctrl_s_ctrl(imx219->vblank,
-				   mode->vts_def - mode->height);
-		/* Update max exposure while meeting expected vblanking */
-		exposure_max = mode->vts_def - 4;
-		exposure_def = (exposure_max < IMX219_EXPOSURE_DEFAULT) ?
-			exposure_max : IMX219_EXPOSURE_DEFAULT;
-		__v4l2_ctrl_modify_range(imx219->exposure,
-					 imx219->exposure->minimum,
-					 exposure_max, imx219->exposure->step,
-					 exposure_def);
-		/*
-		 * Currently PPL is fixed to IMX219_PPL_DEFAULT, so hblank
-		 * depends on mode->width only, and is not changeble in any
-		 * way other than changing the mode.
-		 */
-		hblank = IMX219_PPL_DEFAULT - mode->width;
-		__v4l2_ctrl_modify_range(imx219->hblank, hblank, hblank, 1,
-					 hblank);
+	if (fmt->pad == IMAGE_PAD) {
+		for (i = 0; i < ARRAY_SIZE(codes); i++)
+			if (codes[i] == fmt->format.code)
+				break;
+		if (i >= ARRAY_SIZE(codes))
+			i = 0;
+
+		/* Bayer order varies with flips */
+		fmt->format.code = imx219_get_format_code(imx219, codes[i]);
+
+		mode = v4l2_find_nearest_size(supported_modes,
+					      ARRAY_SIZE(supported_modes),
+					      width, height,
+					      fmt->format.width,
+					      fmt->format.height);
+		imx219_update_image_pad_format(imx219, mode, fmt);
+		if (fmt->which == V4L2_SUBDEV_FORMAT_TRY) {
+			framefmt = v4l2_subdev_get_try_format(sd, sd_state,
+							      fmt->pad);
+			*framefmt = fmt->format;
+		} else if (imx219->mode != mode ||
+			imx219->fmt.code != fmt->format.code) {
+			imx219->fmt = fmt->format;
+			imx219->mode = mode;
+			/* Update limits and set FPS to default */
+			__v4l2_ctrl_modify_range(imx219->vblank,
+						 IMX219_VBLANK_MIN,
+						 IMX219_VTS_MAX - mode->height,
+						 1,
+						 mode->vts_def - mode->height);
+			__v4l2_ctrl_s_ctrl(imx219->vblank,
+					   mode->vts_def - mode->height);
+			/*
+			 * Update max exposure while meeting
+			 * expected vblanking
+			 */
+			exposure_max = mode->vts_def - 4;
+			exposure_def =
+				(exposure_max < IMX219_EXPOSURE_DEFAULT) ?
+					exposure_max : IMX219_EXPOSURE_DEFAULT;
+			__v4l2_ctrl_modify_range(imx219->exposure,
+						 imx219->exposure->minimum,
+						 exposure_max,
+						 imx219->exposure->step,
+						 exposure_def);
+			/*
+			 * Currently PPL is fixed to IMX219_PPL_DEFAULT, so
+			 * hblank depends on mode->width only, and is not
+			 * changeble in any way other than changing the mode.
+			 */
+			hblank = IMX219_PPL_DEFAULT - mode->width;
+			__v4l2_ctrl_modify_range(imx219->hblank, hblank, hblank,
+						 1, hblank);
+		}
+	} else {
+		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 */
+			imx219_update_metadata_pad_format(fmt);
+		}
 	}
 
 	mutex_unlock(&imx219->mutex);
@@ -976,9 +1053,11 @@ static int imx219_start_streaming(struct
 	const struct imx219_reg_list *reg_list;
 	int ret;
 
-	ret = pm_runtime_resume_and_get(&client->dev);
-	if (ret < 0)
+	ret = pm_runtime_get_sync(&client->dev);
+	if (ret < 0) {
+		pm_runtime_put_noidle(&client->dev);
 		return ret;
+	}
 
 	/* Send all registers that are common to all modes */
 	ret = imx219_write_regs(imx219, imx219_common_regs, ARRAY_SIZE(imx219_common_regs));
@@ -1086,21 +1165,22 @@ err_unlock:
 /* Power/clock management functions */
 static int imx219_power_on(struct device *dev)
 {
-	struct v4l2_subdev *sd = dev_get_drvdata(dev);
+	struct i2c_client *client = to_i2c_client(dev);
+	struct v4l2_subdev *sd = i2c_get_clientdata(client);
 	struct imx219 *imx219 = to_imx219(sd);
 	int ret;
 
 	ret = regulator_bulk_enable(IMX219_NUM_SUPPLIES,
 				    imx219->supplies);
 	if (ret) {
-		dev_err(dev, "%s: failed to enable regulators\n",
+		dev_err(&client->dev, "%s: failed to enable regulators\n",
 			__func__);
 		return ret;
 	}
 
 	ret = clk_prepare_enable(imx219->xclk);
 	if (ret) {
-		dev_err(dev, "%s: failed to enable clock\n",
+		dev_err(&client->dev, "%s: failed to enable clock\n",
 			__func__);
 		goto reg_off;
 	}
@@ -1119,7 +1199,8 @@ reg_off:
 
 static int imx219_power_off(struct device *dev)
 {
-	struct v4l2_subdev *sd = dev_get_drvdata(dev);
+	struct i2c_client *client = to_i2c_client(dev);
+	struct v4l2_subdev *sd = i2c_get_clientdata(client);
 	struct imx219 *imx219 = to_imx219(sd);
 
 	gpiod_set_value_cansleep(imx219->reset_gpio, 0);
@@ -1131,7 +1212,8 @@ static int imx219_power_off(struct devic
 
 static int __maybe_unused imx219_suspend(struct device *dev)
 {
-	struct v4l2_subdev *sd = dev_get_drvdata(dev);
+	struct i2c_client *client = to_i2c_client(dev);
+	struct v4l2_subdev *sd = i2c_get_clientdata(client);
 	struct imx219 *imx219 = to_imx219(sd);
 
 	if (imx219->streaming)
@@ -1142,7 +1224,8 @@ static int __maybe_unused imx219_suspend
 
 static int __maybe_unused imx219_resume(struct device *dev)
 {
-	struct v4l2_subdev *sd = dev_get_drvdata(dev);
+	struct i2c_client *client = to_i2c_client(dev);
+	struct v4l2_subdev *sd = i2c_get_clientdata(client);
 	struct imx219 *imx219 = to_imx219(sd);
 	int ret;
 
@@ -1478,13 +1561,14 @@ static int imx219_probe(struct i2c_clien
 			    V4L2_SUBDEV_FL_HAS_EVENTS;
 	imx219->sd.entity.function = MEDIA_ENT_F_CAM_SENSOR;
 
-	/* Initialize source pad */
-	imx219->pad.flags = MEDIA_PAD_FL_SOURCE;
+	/* Initialize source pads */
+	imx219->pad[IMAGE_PAD].flags = MEDIA_PAD_FL_SOURCE;
+	imx219->pad[METADATA_PAD].flags = MEDIA_PAD_FL_SOURCE;
 
 	/* Initialize default format */
 	imx219_set_default_format(imx219);
 
-	ret = media_entity_pads_init(&imx219->sd.entity, 1, &imx219->pad);
+	ret = media_entity_pads_init(&imx219->sd.entity, NUM_PADS, imx219->pad);
 	if (ret) {
 		dev_err(dev, "failed to init entity pads: %d\n", ret);
 		goto error_handler_free;