Re: [PATCH v2 2/8] v4l: vsp1: Share the CLU, LIF and LUT set_fmt pad operation code

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Hi Laurent,

On 22/04/18 23:34, Laurent Pinchart wrote:
> The implementation of the set_fmt pad operation is identical in the
> three modules. Move it to a generic helper function.
> 
> Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@xxxxxxxxxxxxxxxx>

Only a minor pair of comments below regarding source/sink pad descriptions.

If it's not convenient/accurate to define these with an enum then don't worry
about it.

Otherwise,

Reviewed-by: Kieran Bingham <kieran.bingham+renesas@xxxxxxxxxxxxxxxx>

> ---
>  drivers/media/platform/vsp1/vsp1_clu.c    | 65 +++++----------------------
>  drivers/media/platform/vsp1/vsp1_entity.c | 75 +++++++++++++++++++++++++++++++
>  drivers/media/platform/vsp1/vsp1_entity.h |  6 +++
>  drivers/media/platform/vsp1/vsp1_lif.c    | 65 +++++----------------------
>  drivers/media/platform/vsp1/vsp1_lut.c    | 65 +++++----------------------
>  5 files changed, 116 insertions(+), 160 deletions(-)

That's a nice diffstat :-)


> 
> diff --git a/drivers/media/platform/vsp1/vsp1_clu.c b/drivers/media/platform/vsp1/vsp1_clu.c
> index 9626b6308585..96a448e1504c 100644
> --- a/drivers/media/platform/vsp1/vsp1_clu.c
> +++ b/drivers/media/platform/vsp1/vsp1_clu.c
> @@ -114,18 +114,18 @@ static const struct v4l2_ctrl_config clu_mode_control = {
>   * V4L2 Subdevice Pad Operations
>   */
>  
> +static const unsigned int clu_codes[] = {
> +	MEDIA_BUS_FMT_ARGB8888_1X32,
> +	MEDIA_BUS_FMT_AHSV8888_1X32,
> +	MEDIA_BUS_FMT_AYUV8_1X32,
> +};
> +
>  static int clu_enum_mbus_code(struct v4l2_subdev *subdev,
>  			      struct v4l2_subdev_pad_config *cfg,
>  			      struct v4l2_subdev_mbus_code_enum *code)
>  {
> -	static const unsigned int codes[] = {
> -		MEDIA_BUS_FMT_ARGB8888_1X32,
> -		MEDIA_BUS_FMT_AHSV8888_1X32,
> -		MEDIA_BUS_FMT_AYUV8_1X32,
> -	};
> -
> -	return vsp1_subdev_enum_mbus_code(subdev, cfg, code, codes,
> -					  ARRAY_SIZE(codes));
> +	return vsp1_subdev_enum_mbus_code(subdev, cfg, code, clu_codes,
> +					  ARRAY_SIZE(clu_codes));
>  }
>  
>  static int clu_enum_frame_size(struct v4l2_subdev *subdev,
> @@ -141,51 +141,10 @@ static int clu_set_format(struct v4l2_subdev *subdev,
>  			  struct v4l2_subdev_pad_config *cfg,
>  			  struct v4l2_subdev_format *fmt)
>  {
> -	struct vsp1_clu *clu = to_clu(subdev);
> -	struct v4l2_subdev_pad_config *config;
> -	struct v4l2_mbus_framefmt *format;
> -	int ret = 0;
> -
> -	mutex_lock(&clu->entity.lock);
> -
> -	config = vsp1_entity_get_pad_config(&clu->entity, cfg, fmt->which);
> -	if (!config) {
> -		ret = -EINVAL;
> -		goto done;
> -	}
> -
> -	/* Default to YUV if the requested format is not supported. */
> -	if (fmt->format.code != MEDIA_BUS_FMT_ARGB8888_1X32 &&
> -	    fmt->format.code != MEDIA_BUS_FMT_AHSV8888_1X32 &&
> -	    fmt->format.code != MEDIA_BUS_FMT_AYUV8_1X32)
> -		fmt->format.code = MEDIA_BUS_FMT_AYUV8_1X32;
> -
> -	format = vsp1_entity_get_pad_format(&clu->entity, config, fmt->pad);
> -
> -	if (fmt->pad == CLU_PAD_SOURCE) {
> -		/* The CLU output format can't be modified. */
> -		fmt->format = *format;
> -		goto done;
> -	}
> -
> -	format->code = fmt->format.code;
> -	format->width = clamp_t(unsigned int, fmt->format.width,
> -				CLU_MIN_SIZE, CLU_MAX_SIZE);
> -	format->height = clamp_t(unsigned int, fmt->format.height,
> -				 CLU_MIN_SIZE, CLU_MAX_SIZE);
> -	format->field = V4L2_FIELD_NONE;
> -	format->colorspace = V4L2_COLORSPACE_SRGB;
> -
> -	fmt->format = *format;
> -
> -	/* Propagate the format to the source pad. */
> -	format = vsp1_entity_get_pad_format(&clu->entity, config,
> -					    CLU_PAD_SOURCE);
> -	*format = fmt->format;
> -
> -done:
> -	mutex_unlock(&clu->entity.lock);
> -	return ret;
> +	return vsp1_subdev_set_pad_format(subdev, cfg, fmt, clu_codes,
> +					  ARRAY_SIZE(clu_codes),
> +					  CLU_MIN_SIZE, CLU_MIN_SIZE,
> +					  CLU_MAX_SIZE, CLU_MAX_SIZE);
>  }
>  
>  /* -----------------------------------------------------------------------------
> diff --git a/drivers/media/platform/vsp1/vsp1_entity.c b/drivers/media/platform/vsp1/vsp1_entity.c
> index 72354caf5746..239df047efd0 100644
> --- a/drivers/media/platform/vsp1/vsp1_entity.c
> +++ b/drivers/media/platform/vsp1/vsp1_entity.c
> @@ -307,6 +307,81 @@ int vsp1_subdev_enum_frame_size(struct v4l2_subdev *subdev,
>  	return ret;
>  }
>  
> +/*
> + * vsp1_subdev_set_pad_format - Subdev pad set_fmt handler
> + * @subdev: V4L2 subdevice
> + * @cfg: V4L2 subdev pad configuration
> + * @fmt: V4L2 subdev format
> + * @codes: Array of supported media bus codes
> + * @ncodes: Number of supported media bus codes
> + * @min_width: Minimum image width
> + * @min_height: Minimum image height
> + * @max_width: Maximum image width
> + * @max_height: Maximum image height
> + *
> + * This function implements the subdev set_fmt pad operation for entities that
> + * do not support scaling or cropping. It defaults to the first supplied media
> + * bus code if the requested code isn't supported, clamps the size to the
> + * supplied minimum and maximum, and propagates the sink pad format to the
> + * source pad.
> + */
> +int vsp1_subdev_set_pad_format(struct v4l2_subdev *subdev,
> +			       struct v4l2_subdev_pad_config *cfg,
> +			       struct v4l2_subdev_format *fmt,
> +			       const unsigned int *codes, unsigned int ncodes,
> +			       unsigned int min_width, unsigned int min_height,
> +			       unsigned int max_width, unsigned int max_height)
> +{
> +	struct vsp1_entity *entity = to_vsp1_entity(subdev);
> +	struct v4l2_subdev_pad_config *config;
> +	struct v4l2_mbus_framefmt *format;
> +	unsigned int i;
> +	int ret = 0;
> +
> +	mutex_lock(&entity->lock);
> +
> +	config = vsp1_entity_get_pad_config(entity, cfg, fmt->which);
> +	if (!config) {
> +		ret = -EINVAL;
> +		goto done;
> +	}
> +
> +	format = vsp1_entity_get_pad_format(entity, config, fmt->pad);
> +
> +	if (fmt->pad != 0) {

I guess we don't have any clear way to say != *_PAD_SINK here do we ..

> +		/* The output format can't be modified. */
> +		fmt->format = *format;
> +		goto done;
> +	}
> +
> +	/*
> +	 * Default to the first media bus code if the requested format is not
> +	 * supported.
> +	 */
> +	for (i = 0; i < ncodes; ++i) {
> +		if (fmt->format.code == codes[i])
> +			break;
> +	}
> +
> +	format->code = i < ncodes ? codes[i] : codes[0];
> +	format->width = clamp_t(unsigned int, fmt->format.width,
> +				min_width, max_width);
> +	format->height = clamp_t(unsigned int, fmt->format.height,
> +				 min_height, max_height);
> +	format->field = V4L2_FIELD_NONE;
> +	format->colorspace = V4L2_COLORSPACE_SRGB;
> +
> +	fmt->format = *format;
> +
> +	/* Propagate the format to the source pad. */
> +	format = vsp1_entity_get_pad_format(entity, config, 1);

If we can guarantee that ENTITY_PAD_SINK == 0 and ENTITY_PAD_SOURCE == 1, can we
put those into an enum ?


> +	*format = fmt->format;
> +
> +done:
> +	mutex_unlock(&entity->lock);
> +	return ret;
> +}
> +
>  /* -----------------------------------------------------------------------------
>   * Media Operations
>   */
> diff --git a/drivers/media/platform/vsp1/vsp1_entity.h b/drivers/media/platform/vsp1/vsp1_entity.h
> index fb20a1578f3b..0839a62cfa71 100644
> --- a/drivers/media/platform/vsp1/vsp1_entity.h
> +++ b/drivers/media/platform/vsp1/vsp1_entity.h
> @@ -160,6 +160,12 @@ struct media_pad *vsp1_entity_remote_pad(struct media_pad *pad);
>  int vsp1_subdev_get_pad_format(struct v4l2_subdev *subdev,
>  			       struct v4l2_subdev_pad_config *cfg,
>  			       struct v4l2_subdev_format *fmt);
> +int vsp1_subdev_set_pad_format(struct v4l2_subdev *subdev,
> +			       struct v4l2_subdev_pad_config *cfg,
> +			       struct v4l2_subdev_format *fmt,
> +			       const unsigned int *codes, unsigned int ncodes,
> +			       unsigned int min_width, unsigned int min_height,
> +			       unsigned int max_width, unsigned int max_height);
>  int vsp1_subdev_enum_mbus_code(struct v4l2_subdev *subdev,
>  			       struct v4l2_subdev_pad_config *cfg,
>  			       struct v4l2_subdev_mbus_code_enum *code,
> diff --git a/drivers/media/platform/vsp1/vsp1_lif.c b/drivers/media/platform/vsp1/vsp1_lif.c
> index b20b842f06ba..fbdd5715f829 100644
> --- a/drivers/media/platform/vsp1/vsp1_lif.c
> +++ b/drivers/media/platform/vsp1/vsp1_lif.c
> @@ -33,17 +33,17 @@ static inline void vsp1_lif_write(struct vsp1_lif *lif, struct vsp1_dl_list *dl,
>   * V4L2 Subdevice Operations
>   */
>  
> +static const unsigned int lif_codes[] = {
> +	MEDIA_BUS_FMT_ARGB8888_1X32,
> +	MEDIA_BUS_FMT_AYUV8_1X32,
> +};
> +
>  static int lif_enum_mbus_code(struct v4l2_subdev *subdev,
>  			      struct v4l2_subdev_pad_config *cfg,
>  			      struct v4l2_subdev_mbus_code_enum *code)
>  {
> -	static const unsigned int codes[] = {
> -		MEDIA_BUS_FMT_ARGB8888_1X32,
> -		MEDIA_BUS_FMT_AYUV8_1X32,
> -	};
> -
> -	return vsp1_subdev_enum_mbus_code(subdev, cfg, code, codes,
> -					  ARRAY_SIZE(codes));
> +	return vsp1_subdev_enum_mbus_code(subdev, cfg, code, lif_codes,
> +					  ARRAY_SIZE(lif_codes));
>  }
>  
>  static int lif_enum_frame_size(struct v4l2_subdev *subdev,
> @@ -59,53 +59,10 @@ static int lif_set_format(struct v4l2_subdev *subdev,
>  			  struct v4l2_subdev_pad_config *cfg,
>  			  struct v4l2_subdev_format *fmt)
>  {
> -	struct vsp1_lif *lif = to_lif(subdev);
> -	struct v4l2_subdev_pad_config *config;
> -	struct v4l2_mbus_framefmt *format;
> -	int ret = 0;
> -
> -	mutex_lock(&lif->entity.lock);
> -
> -	config = vsp1_entity_get_pad_config(&lif->entity, cfg, fmt->which);
> -	if (!config) {
> -		ret = -EINVAL;
> -		goto done;
> -	}
> -
> -	/* Default to YUV if the requested format is not supported. */
> -	if (fmt->format.code != MEDIA_BUS_FMT_ARGB8888_1X32 &&
> -	    fmt->format.code != MEDIA_BUS_FMT_AYUV8_1X32)
> -		fmt->format.code = MEDIA_BUS_FMT_AYUV8_1X32;
> -
> -	format = vsp1_entity_get_pad_format(&lif->entity, config, fmt->pad);
> -
> -	if (fmt->pad == LIF_PAD_SOURCE) {
> -		/*
> -		 * The LIF source format is always identical to its sink
> -		 * format.
> -		 */
> -		fmt->format = *format;
> -		goto done;
> -	}
> -
> -	format->code = fmt->format.code;
> -	format->width = clamp_t(unsigned int, fmt->format.width,
> -				LIF_MIN_SIZE, LIF_MAX_SIZE);
> -	format->height = clamp_t(unsigned int, fmt->format.height,
> -				 LIF_MIN_SIZE, LIF_MAX_SIZE);
> -	format->field = V4L2_FIELD_NONE;
> -	format->colorspace = V4L2_COLORSPACE_SRGB;
> -
> -	fmt->format = *format;
> -
> -	/* Propagate the format to the source pad. */
> -	format = vsp1_entity_get_pad_format(&lif->entity, config,
> -					    LIF_PAD_SOURCE);
> -	*format = fmt->format;
> -
> -done:
> -	mutex_unlock(&lif->entity.lock);
> -	return ret;
> +	return vsp1_subdev_set_pad_format(subdev, cfg, fmt, lif_codes,
> +					  ARRAY_SIZE(lif_codes),
> +					  LIF_MIN_SIZE, LIF_MIN_SIZE,
> +					  LIF_MAX_SIZE, LIF_MAX_SIZE);
>  }
>  
>  static const struct v4l2_subdev_pad_ops lif_pad_ops = {
> diff --git a/drivers/media/platform/vsp1/vsp1_lut.c b/drivers/media/platform/vsp1/vsp1_lut.c
> index 7bdabb311c6c..f2e48a02ca7d 100644
> --- a/drivers/media/platform/vsp1/vsp1_lut.c
> +++ b/drivers/media/platform/vsp1/vsp1_lut.c
> @@ -90,18 +90,18 @@ static const struct v4l2_ctrl_config lut_table_control = {
>   * V4L2 Subdevice Pad Operations
>   */
>  
> +static const unsigned int lut_codes[] = {
> +	MEDIA_BUS_FMT_ARGB8888_1X32,
> +	MEDIA_BUS_FMT_AHSV8888_1X32,
> +	MEDIA_BUS_FMT_AYUV8_1X32,
> +};
> +
>  static int lut_enum_mbus_code(struct v4l2_subdev *subdev,
>  			      struct v4l2_subdev_pad_config *cfg,
>  			      struct v4l2_subdev_mbus_code_enum *code)
>  {
> -	static const unsigned int codes[] = {
> -		MEDIA_BUS_FMT_ARGB8888_1X32,
> -		MEDIA_BUS_FMT_AHSV8888_1X32,
> -		MEDIA_BUS_FMT_AYUV8_1X32,
> -	};
> -
> -	return vsp1_subdev_enum_mbus_code(subdev, cfg, code, codes,
> -					  ARRAY_SIZE(codes));
> +	return vsp1_subdev_enum_mbus_code(subdev, cfg, code, lut_codes,
> +					  ARRAY_SIZE(lut_codes));
>  }
>  
>  static int lut_enum_frame_size(struct v4l2_subdev *subdev,
> @@ -117,51 +117,10 @@ static int lut_set_format(struct v4l2_subdev *subdev,
>  			  struct v4l2_subdev_pad_config *cfg,
>  			  struct v4l2_subdev_format *fmt)
>  {
> -	struct vsp1_lut *lut = to_lut(subdev);
> -	struct v4l2_subdev_pad_config *config;
> -	struct v4l2_mbus_framefmt *format;
> -	int ret = 0;
> -
> -	mutex_lock(&lut->entity.lock);
> -
> -	config = vsp1_entity_get_pad_config(&lut->entity, cfg, fmt->which);
> -	if (!config) {
> -		ret = -EINVAL;
> -		goto done;
> -	}
> -
> -	/* Default to YUV if the requested format is not supported. */
> -	if (fmt->format.code != MEDIA_BUS_FMT_ARGB8888_1X32 &&
> -	    fmt->format.code != MEDIA_BUS_FMT_AHSV8888_1X32 &&
> -	    fmt->format.code != MEDIA_BUS_FMT_AYUV8_1X32)
> -		fmt->format.code = MEDIA_BUS_FMT_AYUV8_1X32;
> -
> -	format = vsp1_entity_get_pad_format(&lut->entity, config, fmt->pad);
> -
> -	if (fmt->pad == LUT_PAD_SOURCE) {
> -		/* The LUT output format can't be modified. */
> -		fmt->format = *format;
> -		goto done;
> -	}
> -
> -	format->code = fmt->format.code;
> -	format->width = clamp_t(unsigned int, fmt->format.width,
> -				LUT_MIN_SIZE, LUT_MAX_SIZE);
> -	format->height = clamp_t(unsigned int, fmt->format.height,
> -				 LUT_MIN_SIZE, LUT_MAX_SIZE);
> -	format->field = V4L2_FIELD_NONE;
> -	format->colorspace = V4L2_COLORSPACE_SRGB;
> -
> -	fmt->format = *format;
> -
> -	/* Propagate the format to the source pad. */
> -	format = vsp1_entity_get_pad_format(&lut->entity, config,
> -					    LUT_PAD_SOURCE);
> -	*format = fmt->format;
> -
> -done:
> -	mutex_unlock(&lut->entity.lock);
> -	return ret;
> +	return vsp1_subdev_set_pad_format(subdev, cfg, fmt, lut_codes,
> +					  ARRAY_SIZE(lut_codes),
> +					  LUT_MIN_SIZE, LUT_MIN_SIZE,
> +					  LUT_MAX_SIZE, LUT_MAX_SIZE);
>  }
>  
>  /* -----------------------------------------------------------------------------
> 

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