diff mbox series

[08/11] media: adv748x-csi2: Use the subdev active state

Message ID 20240503155127.105235-9-jacopo.mondi@ideasonboard.com (mailing list archive)
State Superseded
Delegated to: Kieran Bingham
Headers show
Series media: renesas: rcar-csi2: Use the subdev active state | expand

Commit Message

Jacopo Mondi May 3, 2024, 3:51 p.m. UTC 
Initialize and use the subdev active state to store the subdevice
format.

This simplifies the implementation of the get_fmt and set_fmt pad
operations.

Signed-off-by: Jacopo Mondi <jacopo.mondi@ideasonboard.com>
---
 drivers/media/i2c/adv748x/adv748x-csi2.c | 114 ++++++++---------------
 drivers/media/i2c/adv748x/adv748x.h      |   1 -
 2 files changed, 41 insertions(+), 74 deletions(-)

Comments

Laurent Pinchart May 5, 2024, 9:15 p.m. UTC | #1 
Hi Jacopo,

Thank you for the patch.

On Fri, May 03, 2024 at 05:51:23PM +0200, Jacopo Mondi wrote:
> Initialize and use the subdev active state to store the subdevice
> format.
> 
> This simplifies the implementation of the get_fmt and set_fmt pad
> operations.
> 
> Signed-off-by: Jacopo Mondi <jacopo.mondi@ideasonboard.com>
> ---
>  drivers/media/i2c/adv748x/adv748x-csi2.c | 114 ++++++++---------------
>  drivers/media/i2c/adv748x/adv748x.h      |   1 -
>  2 files changed, 41 insertions(+), 74 deletions(-)
> 
> diff --git a/drivers/media/i2c/adv748x/adv748x-csi2.c b/drivers/media/i2c/adv748x/adv748x-csi2.c
> index 1aae6467ca62..15a77387b32e 100644
> --- a/drivers/media/i2c/adv748x/adv748x-csi2.c
> +++ b/drivers/media/i2c/adv748x/adv748x-csi2.c
> @@ -6,7 +6,6 @@
>   */
>  
>  #include <linux/module.h>
> -#include <linux/mutex.h>
>  
>  #include <media/v4l2-ctrls.h>
>  #include <media/v4l2-device.h>
> @@ -14,13 +13,6 @@
>  
>  #include "adv748x.h"
>  
> -static const struct v4l2_mbus_framefmt adv748x_csi2_default_fmt = {
> -	.width = 1280,
> -	.height = 720,
> -	.code = MEDIA_BUS_FMT_YUYV8_1X16,
> -	.field = V4L2_FIELD_NONE,
> -};
> -
>  static const unsigned int adv748x_csi2_txa_fmts[] = {
>  	MEDIA_BUS_FMT_YUYV8_1X16,
>  	MEDIA_BUS_FMT_YUYV10_1X20,
> @@ -78,7 +70,32 @@ static int adv748x_csi2_register_link(struct adv748x_csi2 *tx,
>  
>  /* -----------------------------------------------------------------------------
>   * v4l2_subdev_internal_ops
> - *
> + */
> +
> +static int adv748x_csi2_init_state(struct v4l2_subdev *sd,
> +				   struct v4l2_subdev_state *state)
> +{
> +	static const struct v4l2_mbus_framefmt adv748x_csi2_default_fmt = {
> +		.width		= 1280,
> +		.height		= 720,
> +		.code		= MEDIA_BUS_FMT_YUYV8_1X16,

I think this should be UYVY8.

> +		.colorspace	= V4L2_COLORSPACE_SRGB,
> +		.field		= V4L2_FIELD_NONE,
> +		.ycbcr_enc	= V4L2_YCBCR_ENC_DEFAULT,
> +		.quantization	= V4L2_QUANTIZATION_DEFAULT,
> +		.xfer_func	= V4L2_XFER_FUNC_DEFAULT,
> +	};
> +	struct v4l2_mbus_framefmt *fmt;
> +
> +	fmt = v4l2_subdev_state_get_format(state, ADV748X_CSI2_SINK);
> +	*fmt = adv748x_csi2_default_fmt;
> +
> +	*v4l2_subdev_state_get_format(state, ADV748X_CSI2_SOURCE) = *fmt;

For consistency, I'd write

	fmt = v4l2_subdev_state_get_format(state, ADV748X_CSI2_SOURCE);
	*fmt = adv748x_csi2_default_fmt;

> +
> +	return 0;
> +}
> +
> +/*
>   * We use the internal registered operation to be able to ensure that our
>   * incremental subdevices (not connected in the forward path) can be registered
>   * against the resulting video path and media device.
> @@ -128,6 +145,7 @@ static int adv748x_csi2_registered(struct v4l2_subdev *sd)
>  }
>  
>  static const struct v4l2_subdev_internal_ops adv748x_csi2_internal_ops = {
> +	.init_state = adv748x_csi2_init_state,
>  	.registered = adv748x_csi2_registered,
>  };
>  
> @@ -180,41 +198,6 @@ static int adv748x_csi2_enum_mbus_code(struct v4l2_subdev *sd,
>  	return 0;
>  }
>  
> -static struct v4l2_mbus_framefmt *
> -adv748x_csi2_get_pad_format(struct v4l2_subdev *sd,
> -			    struct v4l2_subdev_state *sd_state,
> -			    unsigned int pad, u32 which)
> -{
> -	struct adv748x_csi2 *tx = adv748x_sd_to_csi2(sd);
> -
> -	if (which == V4L2_SUBDEV_FORMAT_TRY)
> -		return v4l2_subdev_state_get_format(sd_state, pad);
> -
> -	return &tx->format;
> -}
> -
> -static int adv748x_csi2_get_format(struct v4l2_subdev *sd,
> -				   struct v4l2_subdev_state *sd_state,
> -				   struct v4l2_subdev_format *sdformat)
> -{
> -	struct adv748x_csi2 *tx = adv748x_sd_to_csi2(sd);
> -	struct adv748x_state *state = tx->state;
> -	struct v4l2_mbus_framefmt *mbusformat;
> -
> -	mbusformat = adv748x_csi2_get_pad_format(sd, sd_state, sdformat->pad,
> -						 sdformat->which);
> -	if (!mbusformat)
> -		return -EINVAL;
> -
> -	mutex_lock(&state->mutex);
> -
> -	sdformat->format = *mbusformat;
> -
> -	mutex_unlock(&state->mutex);
> -
> -	return 0;
> -}
> -
>  static int adv748x_csi2_is_fmt_supported(struct adv748x_csi2 *tx,
>  					 unsigned int code)
>  {
> @@ -237,10 +220,12 @@ static int adv748x_csi2_set_format(struct v4l2_subdev *sd,
>  				   struct v4l2_subdev_format *sdformat)
>  {
>  	struct adv748x_csi2 *tx = adv748x_sd_to_csi2(sd);
> -	struct adv748x_state *state = tx->state;
>  	struct v4l2_mbus_framefmt *mbusformat;
>  	int ret;
>  
> +	if (sdformat->pad == ADV748X_CSI2_SOURCE)
> +		return v4l2_subdev_get_fmt(sd, sd_state, sdformat);
> +
>  	/*
>  	 * Make sure the format is supported, if not default it to
>  	 * YUYV8 as it's supported by both TXes.
> @@ -249,34 +234,14 @@ static int adv748x_csi2_set_format(struct v4l2_subdev *sd,
>  	if (ret)
>  		sdformat->format.code = MEDIA_BUS_FMT_YUYV8_1X16;
>  
> -	mbusformat = adv748x_csi2_get_pad_format(sd, sd_state, sdformat->pad,
> -						 sdformat->which);
> -	if (!mbusformat)
> -		return -EINVAL;
> -
> -	mutex_lock(&state->mutex);

The function was locking the device-wide mutex, now it's only locking
the state of this particular subdev. Have you checked this doesn't
introduce any race condition ? If so, please indicate it in the commit
message. If so, please check it :-)

> -
> -	if (sdformat->pad == ADV748X_CSI2_SOURCE) {
> -		const struct v4l2_mbus_framefmt *sink_fmt;
> -
> -		sink_fmt = adv748x_csi2_get_pad_format(sd, sd_state,
> -						       ADV748X_CSI2_SINK,
> -						       sdformat->which);
> -
> -		if (!sink_fmt) {
> -			ret = -EINVAL;
> -			goto unlock;
> -		}
> -
> -		sdformat->format = *sink_fmt;
> -	}
> -
> +	mbusformat = v4l2_subdev_state_get_format(sd_state, sdformat->pad);
>  	*mbusformat = sdformat->format;
>  
> -unlock:
> -	mutex_unlock(&state->mutex);
> +	/* Propagate format to the source pad. */
> +	mbusformat = v4l2_subdev_state_get_format(sd_state, ADV748X_CSI2_SOURCE);
> +	*mbusformat = sdformat->format;
>  
> -	return ret;
> +	return 0;
>  }
>  
>  static int adv748x_csi2_get_mbus_config(struct v4l2_subdev *sd, unsigned int pad,
> @@ -295,7 +260,7 @@ static int adv748x_csi2_get_mbus_config(struct v4l2_subdev *sd, unsigned int pad
>  
>  static const struct v4l2_subdev_pad_ops adv748x_csi2_pad_ops = {
>  	.enum_mbus_code = adv748x_csi2_enum_mbus_code,
> -	.get_fmt = adv748x_csi2_get_format,
> +	.get_fmt = v4l2_subdev_get_fmt,
>  	.set_fmt = adv748x_csi2_set_format,
>  	.get_mbus_config = adv748x_csi2_get_mbus_config,
>  };
> @@ -378,8 +343,6 @@ int adv748x_csi2_init(struct adv748x_state *state, struct adv748x_csi2 *tx)
>  	if (ret)
>  		return ret;
>  
> -	tx->format = adv748x_csi2_default_fmt;
> -
>  	ret = v4l2_async_subdev_endpoint_add(&tx->sd,
>  					     of_fwnode_handle(state->endpoints[tx->port]));
>  	if (ret)
> @@ -389,6 +352,11 @@ int adv748x_csi2_init(struct adv748x_state *state, struct adv748x_csi2 *tx)
>  	if (ret)
>  		goto err_cleanup_subdev;
>  
> +	tx->sd.state_lock = &state->mutex;

Ah, that answers my question above.

Can you also convert the AFE and HDMI subdevs to use the active state ?

> +	ret = v4l2_subdev_init_finalize(&tx->sd);
> +	if (ret)
> +		goto err_free_ctrl;
> +
>  	ret = v4l2_async_register_subdev(&tx->sd);
>  	if (ret)
>  		goto err_free_ctrl;
> diff --git a/drivers/media/i2c/adv748x/adv748x.h b/drivers/media/i2c/adv748x/adv748x.h
> index d2b5e722e997..9bc0121d0eff 100644
> --- a/drivers/media/i2c/adv748x/adv748x.h
> +++ b/drivers/media/i2c/adv748x/adv748x.h
> @@ -75,7 +75,6 @@ enum adv748x_csi2_pads {
>  
>  struct adv748x_csi2 {
>  	struct adv748x_state *state;
> -	struct v4l2_mbus_framefmt format;
>  	unsigned int page;
>  	unsigned int port;
>  	unsigned int num_lanes;
diff mbox series

Patch

diff --git a/drivers/media/i2c/adv748x/adv748x-csi2.c b/drivers/media/i2c/adv748x/adv748x-csi2.c
index 1aae6467ca62..15a77387b32e 100644
--- a/drivers/media/i2c/adv748x/adv748x-csi2.c
+++ b/drivers/media/i2c/adv748x/adv748x-csi2.c
@@ -6,7 +6,6 @@ 
  */
 
 #include <linux/module.h>
-#include <linux/mutex.h>
 
 #include <media/v4l2-ctrls.h>
 #include <media/v4l2-device.h>
@@ -14,13 +13,6 @@ 
 
 #include "adv748x.h"
 
-static const struct v4l2_mbus_framefmt adv748x_csi2_default_fmt = {
-	.width = 1280,
-	.height = 720,
-	.code = MEDIA_BUS_FMT_YUYV8_1X16,
-	.field = V4L2_FIELD_NONE,
-};
-
 static const unsigned int adv748x_csi2_txa_fmts[] = {
 	MEDIA_BUS_FMT_YUYV8_1X16,
 	MEDIA_BUS_FMT_YUYV10_1X20,
@@ -78,7 +70,32 @@  static int adv748x_csi2_register_link(struct adv748x_csi2 *tx,
 
 /* -----------------------------------------------------------------------------
  * v4l2_subdev_internal_ops
- *
+ */
+
+static int adv748x_csi2_init_state(struct v4l2_subdev *sd,
+				   struct v4l2_subdev_state *state)
+{
+	static const struct v4l2_mbus_framefmt adv748x_csi2_default_fmt = {
+		.width		= 1280,
+		.height		= 720,
+		.code		= MEDIA_BUS_FMT_YUYV8_1X16,
+		.colorspace	= V4L2_COLORSPACE_SRGB,
+		.field		= V4L2_FIELD_NONE,
+		.ycbcr_enc	= V4L2_YCBCR_ENC_DEFAULT,
+		.quantization	= V4L2_QUANTIZATION_DEFAULT,
+		.xfer_func	= V4L2_XFER_FUNC_DEFAULT,
+	};
+	struct v4l2_mbus_framefmt *fmt;
+
+	fmt = v4l2_subdev_state_get_format(state, ADV748X_CSI2_SINK);
+	*fmt = adv748x_csi2_default_fmt;
+
+	*v4l2_subdev_state_get_format(state, ADV748X_CSI2_SOURCE) = *fmt;
+
+	return 0;
+}
+
+/*
  * We use the internal registered operation to be able to ensure that our
  * incremental subdevices (not connected in the forward path) can be registered
  * against the resulting video path and media device.
@@ -128,6 +145,7 @@  static int adv748x_csi2_registered(struct v4l2_subdev *sd)
 }
 
 static const struct v4l2_subdev_internal_ops adv748x_csi2_internal_ops = {
+	.init_state = adv748x_csi2_init_state,
 	.registered = adv748x_csi2_registered,
 };
 
@@ -180,41 +198,6 @@  static int adv748x_csi2_enum_mbus_code(struct v4l2_subdev *sd,
 	return 0;
 }
 
-static struct v4l2_mbus_framefmt *
-adv748x_csi2_get_pad_format(struct v4l2_subdev *sd,
-			    struct v4l2_subdev_state *sd_state,
-			    unsigned int pad, u32 which)
-{
-	struct adv748x_csi2 *tx = adv748x_sd_to_csi2(sd);
-
-	if (which == V4L2_SUBDEV_FORMAT_TRY)
-		return v4l2_subdev_state_get_format(sd_state, pad);
-
-	return &tx->format;
-}
-
-static int adv748x_csi2_get_format(struct v4l2_subdev *sd,
-				   struct v4l2_subdev_state *sd_state,
-				   struct v4l2_subdev_format *sdformat)
-{
-	struct adv748x_csi2 *tx = adv748x_sd_to_csi2(sd);
-	struct adv748x_state *state = tx->state;
-	struct v4l2_mbus_framefmt *mbusformat;
-
-	mbusformat = adv748x_csi2_get_pad_format(sd, sd_state, sdformat->pad,
-						 sdformat->which);
-	if (!mbusformat)
-		return -EINVAL;
-
-	mutex_lock(&state->mutex);
-
-	sdformat->format = *mbusformat;
-
-	mutex_unlock(&state->mutex);
-
-	return 0;
-}
-
 static int adv748x_csi2_is_fmt_supported(struct adv748x_csi2 *tx,
 					 unsigned int code)
 {
@@ -237,10 +220,12 @@  static int adv748x_csi2_set_format(struct v4l2_subdev *sd,
 				   struct v4l2_subdev_format *sdformat)
 {
 	struct adv748x_csi2 *tx = adv748x_sd_to_csi2(sd);
-	struct adv748x_state *state = tx->state;
 	struct v4l2_mbus_framefmt *mbusformat;
 	int ret;
 
+	if (sdformat->pad == ADV748X_CSI2_SOURCE)
+		return v4l2_subdev_get_fmt(sd, sd_state, sdformat);
+
 	/*
 	 * Make sure the format is supported, if not default it to
 	 * YUYV8 as it's supported by both TXes.
@@ -249,34 +234,14 @@  static int adv748x_csi2_set_format(struct v4l2_subdev *sd,
 	if (ret)
 		sdformat->format.code = MEDIA_BUS_FMT_YUYV8_1X16;
 
-	mbusformat = adv748x_csi2_get_pad_format(sd, sd_state, sdformat->pad,
-						 sdformat->which);
-	if (!mbusformat)
-		return -EINVAL;
-
-	mutex_lock(&state->mutex);
-
-	if (sdformat->pad == ADV748X_CSI2_SOURCE) {
-		const struct v4l2_mbus_framefmt *sink_fmt;
-
-		sink_fmt = adv748x_csi2_get_pad_format(sd, sd_state,
-						       ADV748X_CSI2_SINK,
-						       sdformat->which);
-
-		if (!sink_fmt) {
-			ret = -EINVAL;
-			goto unlock;
-		}
-
-		sdformat->format = *sink_fmt;
-	}
-
+	mbusformat = v4l2_subdev_state_get_format(sd_state, sdformat->pad);
 	*mbusformat = sdformat->format;
 
-unlock:
-	mutex_unlock(&state->mutex);
+	/* Propagate format to the source pad. */
+	mbusformat = v4l2_subdev_state_get_format(sd_state, ADV748X_CSI2_SOURCE);
+	*mbusformat = sdformat->format;
 
-	return ret;
+	return 0;
 }
 
 static int adv748x_csi2_get_mbus_config(struct v4l2_subdev *sd, unsigned int pad,
@@ -295,7 +260,7 @@  static int adv748x_csi2_get_mbus_config(struct v4l2_subdev *sd, unsigned int pad
 
 static const struct v4l2_subdev_pad_ops adv748x_csi2_pad_ops = {
 	.enum_mbus_code = adv748x_csi2_enum_mbus_code,
-	.get_fmt = adv748x_csi2_get_format,
+	.get_fmt = v4l2_subdev_get_fmt,
 	.set_fmt = adv748x_csi2_set_format,
 	.get_mbus_config = adv748x_csi2_get_mbus_config,
 };
@@ -378,8 +343,6 @@  int adv748x_csi2_init(struct adv748x_state *state, struct adv748x_csi2 *tx)
 	if (ret)
 		return ret;
 
-	tx->format = adv748x_csi2_default_fmt;
-
 	ret = v4l2_async_subdev_endpoint_add(&tx->sd,
 					     of_fwnode_handle(state->endpoints[tx->port]));
 	if (ret)
@@ -389,6 +352,11 @@  int adv748x_csi2_init(struct adv748x_state *state, struct adv748x_csi2 *tx)
 	if (ret)
 		goto err_cleanup_subdev;
 
+	tx->sd.state_lock = &state->mutex;
+	ret = v4l2_subdev_init_finalize(&tx->sd);
+	if (ret)
+		goto err_free_ctrl;
+
 	ret = v4l2_async_register_subdev(&tx->sd);
 	if (ret)
 		goto err_free_ctrl;
diff --git a/drivers/media/i2c/adv748x/adv748x.h b/drivers/media/i2c/adv748x/adv748x.h
index d2b5e722e997..9bc0121d0eff 100644
--- a/drivers/media/i2c/adv748x/adv748x.h
+++ b/drivers/media/i2c/adv748x/adv748x.h
@@ -75,7 +75,6 @@  enum adv748x_csi2_pads {
 
 struct adv748x_csi2 {
 	struct adv748x_state *state;
-	struct v4l2_mbus_framefmt format;
 	unsigned int page;
 	unsigned int port;
 	unsigned int num_lanes;