LinuxTV Patchwork [01/16] media: Move sp2mp functions to v4l2-common

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Submitter André Almeida
Date March 15, 2019, 4:43 p.m.
Message ID <20190315164359.626-2-andrealmeid@collabora.com>
Download mbox | patch
Permalink /patch/55064/
State New
Headers show

Comments

André Almeida - March 15, 2019, 4:43 p.m.
Move sp2mp functions from vivid cote to v4l2-common as it will be reused
by vimc driver for multiplanar support.

Signed-off-by: André Almeida <andrealmeid@collabora.com>
---
 drivers/media/platform/vivid/vivid-vid-cap.c  |  6 +-
 .../media/platform/vivid/vivid-vid-common.c   | 59 ------------------
 .../media/platform/vivid/vivid-vid-common.h   |  9 ---
 drivers/media/platform/vivid/vivid-vid-out.c  |  6 +-
 drivers/media/v4l2-core/v4l2-common.c         | 62 +++++++++++++++++++
 include/media/v4l2-common.h                   | 31 ++++++++++
 6 files changed, 99 insertions(+), 74 deletions(-)
Helen Fornazier - March 15, 2019, 7:30 p.m.
On 3/15/19 1:43 PM, André Almeida wrote:
> Move sp2mp functions from vivid cote to v4l2-common as it will be reused
> by vimc driver for multiplanar support.

s/cote/code

> 
> Signed-off-by: André Almeida <andrealmeid@collabora.com>
> ---
>  drivers/media/platform/vivid/vivid-vid-cap.c  |  6 +-
>  .../media/platform/vivid/vivid-vid-common.c   | 59 ------------------
>  .../media/platform/vivid/vivid-vid-common.h   |  9 ---
>  drivers/media/platform/vivid/vivid-vid-out.c  |  6 +-
>  drivers/media/v4l2-core/v4l2-common.c         | 62 +++++++++++++++++++
>  include/media/v4l2-common.h                   | 31 ++++++++++
>  6 files changed, 99 insertions(+), 74 deletions(-)
> 
> diff --git a/drivers/media/platform/vivid/vivid-vid-cap.c b/drivers/media/platform/vivid/vivid-vid-cap.c
> index 52eeda624d7e..b5ad71bbf7bf 100644
> --- a/drivers/media/platform/vivid/vivid-vid-cap.c
> +++ b/drivers/media/platform/vivid/vivid-vid-cap.c
> @@ -815,7 +815,7 @@ int vidioc_g_fmt_vid_cap(struct file *file, void *priv,
>  
>  	if (dev->multiplanar)
>  		return -ENOTTY;
> -	return fmt_sp2mp_func(file, priv, f, vivid_g_fmt_vid_cap);
> +	return v4l2_fmt_sp2mp_func(file, priv, f, vivid_g_fmt_vid_cap);
>  }
>  
>  int vidioc_try_fmt_vid_cap(struct file *file, void *priv,
> @@ -825,7 +825,7 @@ int vidioc_try_fmt_vid_cap(struct file *file, void *priv,
>  
>  	if (dev->multiplanar)
>  		return -ENOTTY;
> -	return fmt_sp2mp_func(file, priv, f, vivid_try_fmt_vid_cap);
> +	return v4l2_fmt_sp2mp_func(file, priv, f, vivid_try_fmt_vid_cap);
>  }
>  
>  int vidioc_s_fmt_vid_cap(struct file *file, void *priv,
> @@ -835,7 +835,7 @@ int vidioc_s_fmt_vid_cap(struct file *file, void *priv,
>  
>  	if (dev->multiplanar)
>  		return -ENOTTY;
> -	return fmt_sp2mp_func(file, priv, f, vivid_s_fmt_vid_cap);
> +	return v4l2_fmt_sp2mp_func(file, priv, f, vivid_s_fmt_vid_cap);
>  }
>  
>  int vivid_vid_cap_g_selection(struct file *file, void *priv,
> diff --git a/drivers/media/platform/vivid/vivid-vid-common.c b/drivers/media/platform/vivid/vivid-vid-common.c
> index 74b83bcc6119..3dd3a05d2e67 100644
> --- a/drivers/media/platform/vivid/vivid-vid-common.c
> +++ b/drivers/media/platform/vivid/vivid-vid-common.c
> @@ -674,65 +674,6 @@ void vivid_send_source_change(struct vivid_dev *dev, unsigned type)
>  	}
>  }
>  
> -/*
> - * Conversion function that converts a single-planar format to a
> - * single-plane multiplanar format.
> - */
> -void fmt_sp2mp(const struct v4l2_format *sp_fmt, struct v4l2_format *mp_fmt)
> -{
> -	struct v4l2_pix_format_mplane *mp = &mp_fmt->fmt.pix_mp;
> -	struct v4l2_plane_pix_format *ppix = &mp->plane_fmt[0];
> -	const struct v4l2_pix_format *pix = &sp_fmt->fmt.pix;
> -	bool is_out = sp_fmt->type == V4L2_BUF_TYPE_VIDEO_OUTPUT;
> -
> -	memset(mp->reserved, 0, sizeof(mp->reserved));
> -	mp_fmt->type = is_out ? V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE :
> -			   V4L2_CAP_VIDEO_CAPTURE_MPLANE;
> -	mp->width = pix->width;
> -	mp->height = pix->height;
> -	mp->pixelformat = pix->pixelformat;
> -	mp->field = pix->field;
> -	mp->colorspace = pix->colorspace;
> -	mp->xfer_func = pix->xfer_func;
> -	/* Also copies hsv_enc */
> -	mp->ycbcr_enc = pix->ycbcr_enc;
> -	mp->quantization = pix->quantization;
> -	mp->num_planes = 1;
> -	mp->flags = pix->flags;
> -	ppix->sizeimage = pix->sizeimage;
> -	ppix->bytesperline = pix->bytesperline;
> -	memset(ppix->reserved, 0, sizeof(ppix->reserved));
> -}
> -
> -int fmt_sp2mp_func(struct file *file, void *priv,
> -		struct v4l2_format *f, fmtfunc func)
> -{
> -	struct v4l2_format fmt;
> -	struct v4l2_pix_format_mplane *mp = &fmt.fmt.pix_mp;
> -	struct v4l2_plane_pix_format *ppix = &mp->plane_fmt[0];
> -	struct v4l2_pix_format *pix = &f->fmt.pix;
> -	int ret;
> -
> -	/* Converts to a mplane format */
> -	fmt_sp2mp(f, &fmt);
> -	/* Passes it to the generic mplane format function */
> -	ret = func(file, priv, &fmt);
> -	/* Copies back the mplane data to the single plane format */
> -	pix->width = mp->width;
> -	pix->height = mp->height;
> -	pix->pixelformat = mp->pixelformat;
> -	pix->field = mp->field;
> -	pix->colorspace = mp->colorspace;
> -	pix->xfer_func = mp->xfer_func;
> -	/* Also copies hsv_enc */
> -	pix->ycbcr_enc = mp->ycbcr_enc;
> -	pix->quantization = mp->quantization;
> -	pix->sizeimage = ppix->sizeimage;
> -	pix->bytesperline = ppix->bytesperline;
> -	pix->flags = mp->flags;
> -	return ret;
> -}
> -
>  int vivid_vid_adjust_sel(unsigned flags, struct v4l2_rect *r)
>  {
>  	unsigned w = r->width;
> diff --git a/drivers/media/platform/vivid/vivid-vid-common.h b/drivers/media/platform/vivid/vivid-vid-common.h
> index 29b6c0b40a1b..13adea56baa0 100644
> --- a/drivers/media/platform/vivid/vivid-vid-common.h
> +++ b/drivers/media/platform/vivid/vivid-vid-common.h
> @@ -8,15 +8,6 @@
>  #ifndef _VIVID_VID_COMMON_H_
>  #define _VIVID_VID_COMMON_H_
>  
> -typedef int (*fmtfunc)(struct file *file, void *priv, struct v4l2_format *f);
> -
> -/*
> - * Conversion function that converts a single-planar format to a
> - * single-plane multiplanar format.
> - */
> -void fmt_sp2mp(const struct v4l2_format *sp_fmt, struct v4l2_format *mp_fmt);
> -int fmt_sp2mp_func(struct file *file, void *priv,
> -		struct v4l2_format *f, fmtfunc func);
>  
>  extern const struct v4l2_dv_timings_cap vivid_dv_timings_cap;
>  
> diff --git a/drivers/media/platform/vivid/vivid-vid-out.c b/drivers/media/platform/vivid/vivid-vid-out.c
> index e61b91b414f9..c42ba5ade6cf 100644
> --- a/drivers/media/platform/vivid/vivid-vid-out.c
> +++ b/drivers/media/platform/vivid/vivid-vid-out.c
> @@ -612,7 +612,7 @@ int vidioc_g_fmt_vid_out(struct file *file, void *priv,
>  
>  	if (dev->multiplanar)
>  		return -ENOTTY;
> -	return fmt_sp2mp_func(file, priv, f, vivid_g_fmt_vid_out);
> +	return v4l2_fmt_sp2mp_func(file, priv, f, vivid_g_fmt_vid_out);
>  }
>  
>  int vidioc_try_fmt_vid_out(struct file *file, void *priv,
> @@ -622,7 +622,7 @@ int vidioc_try_fmt_vid_out(struct file *file, void *priv,
>  
>  	if (dev->multiplanar)
>  		return -ENOTTY;
> -	return fmt_sp2mp_func(file, priv, f, vivid_try_fmt_vid_out);
> +	return v4l2_fmt_sp2mp_func(file, priv, f, vivid_try_fmt_vid_out);
>  }
>  
>  int vidioc_s_fmt_vid_out(struct file *file, void *priv,
> @@ -632,7 +632,7 @@ int vidioc_s_fmt_vid_out(struct file *file, void *priv,
>  
>  	if (dev->multiplanar)
>  		return -ENOTTY;
> -	return fmt_sp2mp_func(file, priv, f, vivid_s_fmt_vid_out);
> +	return v4l2_fmt_sp2mp_func(file, priv, f, vivid_s_fmt_vid_out);
>  }
>  
>  int vivid_vid_out_g_selection(struct file *file, void *priv,
> diff --git a/drivers/media/v4l2-core/v4l2-common.c b/drivers/media/v4l2-core/v4l2-common.c
> index 779e44d6db43..d118f8f34d32 100644
> --- a/drivers/media/v4l2-core/v4l2-common.c
> +++ b/drivers/media/v4l2-core/v4l2-common.c
> @@ -653,3 +653,65 @@ int v4l2_fill_pixfmt(struct v4l2_pix_format *pixfmt, int pixelformat, int width,
>  	return 0;
>  }
>  EXPORT_SYMBOL_GPL(v4l2_fill_pixfmt);
> +
> +/*
> + * Conversion functions that convert a single-planar format to a
> + * multi-planar format.
> + */
> +void v4l2_fmt_sp2mp(const struct v4l2_format *sp_fmt,
> +		struct v4l2_format *mp_fmt)
> +{
> +	struct v4l2_pix_format_mplane *mp = &mp_fmt->fmt.pix_mp;
> +	struct v4l2_plane_pix_format *ppix = &mp->plane_fmt[0];
> +	const struct v4l2_pix_format *pix = &sp_fmt->fmt.pix;
> +	bool is_out = sp_fmt->type == V4L2_BUF_TYPE_VIDEO_OUTPUT;
> +
> +	memset(mp->reserved, 0, sizeof(mp->reserved));
> +	mp_fmt->type = is_out ? V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE :
> +			   V4L2_CAP_VIDEO_CAPTURE_MPLANE;
> +	mp->width = pix->width;
> +	mp->height = pix->height;
> +	mp->pixelformat = pix->pixelformat;
> +	mp->field = pix->field;
> +	mp->colorspace = pix->colorspace;
> +	mp->xfer_func = pix->xfer_func;
> +	/* Also copies hsv_enc */
> +	mp->ycbcr_enc = pix->ycbcr_enc;
> +	mp->quantization = pix->quantization;
> +	mp->num_planes = 1;
> +	mp->flags = pix->flags;
> +	ppix->sizeimage = pix->sizeimage;
> +	ppix->bytesperline = pix->bytesperline;
> +	memset(ppix->reserved, 0, sizeof(ppix->reserved));
> +}
> +EXPORT_SYMBOL_GPL(v4l2_fmt_sp2mp);
> +
> +int v4l2_fmt_sp2mp_func(struct file *file, void *priv,
> +		struct v4l2_format *f, v4l2_fmtfunc func)
> +{
> +	struct v4l2_format fmt;
> +	struct v4l2_pix_format_mplane *mp = &fmt.fmt.pix_mp;
> +	struct v4l2_plane_pix_format *ppix = &mp->plane_fmt[0];
> +	struct v4l2_pix_format *pix = &f->fmt.pix;
> +	int ret;
> +
> +	/* Converts to a mplane format */
> +	v4l2_fmt_sp2mp(f, &fmt);
> +	/* Passes it to the generic mplane format function */
> +	ret = func(file, priv, &fmt);
> +	/* Copies back the mplane data to the single plane format */
> +	pix->width = mp->width;
> +	pix->height = mp->height;
> +	pix->pixelformat = mp->pixelformat;
> +	pix->field = mp->field;
> +	pix->colorspace = mp->colorspace;
> +	pix->xfer_func = mp->xfer_func;
> +	/* Also copies hsv_enc */
> +	pix->ycbcr_enc = mp->ycbcr_enc;
> +	pix->quantization = mp->quantization;
> +	pix->sizeimage = ppix->sizeimage;
> +	pix->bytesperline = ppix->bytesperline;
> +	pix->flags = mp->flags;
> +	return ret;
> +}
> +EXPORT_SYMBOL_GPL(v4l2_fmt_sp2mp_func);
> diff --git a/include/media/v4l2-common.h b/include/media/v4l2-common.h
> index 937b74a946cd..d106f36ebaf4 100644
> --- a/include/media/v4l2-common.h
> +++ b/include/media/v4l2-common.h
> @@ -424,4 +424,35 @@ int v4l2_fill_pixfmt(struct v4l2_pix_format *pixfmt, int pixelformat,
>  int v4l2_fill_pixfmt_mp(struct v4l2_pix_format_mplane *pixfmt, int pixelformat,
>  			int width, int height);
>  
> +/**
> + * v4l2_fmtfunc - type to be used by v4l2_fmt_sp2mp_func to pass the generic
> + * mp function as argument

You can use a shorter title, e.g.
Function pointer type for v4l2_fmt_sp2mp()

And you can add a better description below,
e.g.https://git.linuxtv.org/media_tree.git/tree/include/media/v4l2-common.h#n287

this also applies to other docs.

> + * @file: device's descriptor file
> + * @priv: private data pointer
> + * @f: format that holds a mp pixel format
> + */
> +typedef int (*v4l2_fmtfunc)(struct file *file, void *priv,
> +		struct v4l2_format *f);

It would be nice if you could align the second line with the arguments
of the function in the first line.

> +
> +/**
> + * v4l2_fmt_sp2mp - transforms a single-planar format struct into a multi-planar
> + * struct
> + * @sp_fmt: pointer to the single-planar format struct (in)
> + * @mp_fmt: pointer to the multi-planar format struct (out)
> + */
> +void v4l2_fmt_sp2mp(const struct v4l2_format *sp_fmt,
> +		struct v4l2_format *mp_fmt);

same here regarding alignment.

> +
> +/**
> + * v4l2_fmt_sp2mp_func - handler to call a generic multi-planar format function
> + * using single-planar format. It converts the sp to a mp, calls the
> + * function and converts mp back to sp.
> + * @file: device's descriptor file
> + * @priv: private data pointer
> + * @f: format that holds a sp pixel format
> + * @func: generic mp function
> + */
> +int v4l2_fmt_sp2mp_func(struct file *file, void *priv,
> +		struct v4l2_format *f, v4l2_fmtfunc func);

same here regarding alignment.

Regards,
Helen

> +
>  #endif /* V4L2_COMMON_H_ */
>

Patch

diff --git a/drivers/media/platform/vivid/vivid-vid-cap.c b/drivers/media/platform/vivid/vivid-vid-cap.c
index 52eeda624d7e..b5ad71bbf7bf 100644
--- a/drivers/media/platform/vivid/vivid-vid-cap.c
+++ b/drivers/media/platform/vivid/vivid-vid-cap.c
@@ -815,7 +815,7 @@  int vidioc_g_fmt_vid_cap(struct file *file, void *priv,
 
 	if (dev->multiplanar)
 		return -ENOTTY;
-	return fmt_sp2mp_func(file, priv, f, vivid_g_fmt_vid_cap);
+	return v4l2_fmt_sp2mp_func(file, priv, f, vivid_g_fmt_vid_cap);
 }
 
 int vidioc_try_fmt_vid_cap(struct file *file, void *priv,
@@ -825,7 +825,7 @@  int vidioc_try_fmt_vid_cap(struct file *file, void *priv,
 
 	if (dev->multiplanar)
 		return -ENOTTY;
-	return fmt_sp2mp_func(file, priv, f, vivid_try_fmt_vid_cap);
+	return v4l2_fmt_sp2mp_func(file, priv, f, vivid_try_fmt_vid_cap);
 }
 
 int vidioc_s_fmt_vid_cap(struct file *file, void *priv,
@@ -835,7 +835,7 @@  int vidioc_s_fmt_vid_cap(struct file *file, void *priv,
 
 	if (dev->multiplanar)
 		return -ENOTTY;
-	return fmt_sp2mp_func(file, priv, f, vivid_s_fmt_vid_cap);
+	return v4l2_fmt_sp2mp_func(file, priv, f, vivid_s_fmt_vid_cap);
 }
 
 int vivid_vid_cap_g_selection(struct file *file, void *priv,
diff --git a/drivers/media/platform/vivid/vivid-vid-common.c b/drivers/media/platform/vivid/vivid-vid-common.c
index 74b83bcc6119..3dd3a05d2e67 100644
--- a/drivers/media/platform/vivid/vivid-vid-common.c
+++ b/drivers/media/platform/vivid/vivid-vid-common.c
@@ -674,65 +674,6 @@  void vivid_send_source_change(struct vivid_dev *dev, unsigned type)
 	}
 }
 
-/*
- * Conversion function that converts a single-planar format to a
- * single-plane multiplanar format.
- */
-void fmt_sp2mp(const struct v4l2_format *sp_fmt, struct v4l2_format *mp_fmt)
-{
-	struct v4l2_pix_format_mplane *mp = &mp_fmt->fmt.pix_mp;
-	struct v4l2_plane_pix_format *ppix = &mp->plane_fmt[0];
-	const struct v4l2_pix_format *pix = &sp_fmt->fmt.pix;
-	bool is_out = sp_fmt->type == V4L2_BUF_TYPE_VIDEO_OUTPUT;
-
-	memset(mp->reserved, 0, sizeof(mp->reserved));
-	mp_fmt->type = is_out ? V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE :
-			   V4L2_CAP_VIDEO_CAPTURE_MPLANE;
-	mp->width = pix->width;
-	mp->height = pix->height;
-	mp->pixelformat = pix->pixelformat;
-	mp->field = pix->field;
-	mp->colorspace = pix->colorspace;
-	mp->xfer_func = pix->xfer_func;
-	/* Also copies hsv_enc */
-	mp->ycbcr_enc = pix->ycbcr_enc;
-	mp->quantization = pix->quantization;
-	mp->num_planes = 1;
-	mp->flags = pix->flags;
-	ppix->sizeimage = pix->sizeimage;
-	ppix->bytesperline = pix->bytesperline;
-	memset(ppix->reserved, 0, sizeof(ppix->reserved));
-}
-
-int fmt_sp2mp_func(struct file *file, void *priv,
-		struct v4l2_format *f, fmtfunc func)
-{
-	struct v4l2_format fmt;
-	struct v4l2_pix_format_mplane *mp = &fmt.fmt.pix_mp;
-	struct v4l2_plane_pix_format *ppix = &mp->plane_fmt[0];
-	struct v4l2_pix_format *pix = &f->fmt.pix;
-	int ret;
-
-	/* Converts to a mplane format */
-	fmt_sp2mp(f, &fmt);
-	/* Passes it to the generic mplane format function */
-	ret = func(file, priv, &fmt);
-	/* Copies back the mplane data to the single plane format */
-	pix->width = mp->width;
-	pix->height = mp->height;
-	pix->pixelformat = mp->pixelformat;
-	pix->field = mp->field;
-	pix->colorspace = mp->colorspace;
-	pix->xfer_func = mp->xfer_func;
-	/* Also copies hsv_enc */
-	pix->ycbcr_enc = mp->ycbcr_enc;
-	pix->quantization = mp->quantization;
-	pix->sizeimage = ppix->sizeimage;
-	pix->bytesperline = ppix->bytesperline;
-	pix->flags = mp->flags;
-	return ret;
-}
-
 int vivid_vid_adjust_sel(unsigned flags, struct v4l2_rect *r)
 {
 	unsigned w = r->width;
diff --git a/drivers/media/platform/vivid/vivid-vid-common.h b/drivers/media/platform/vivid/vivid-vid-common.h
index 29b6c0b40a1b..13adea56baa0 100644
--- a/drivers/media/platform/vivid/vivid-vid-common.h
+++ b/drivers/media/platform/vivid/vivid-vid-common.h
@@ -8,15 +8,6 @@ 
 #ifndef _VIVID_VID_COMMON_H_
 #define _VIVID_VID_COMMON_H_
 
-typedef int (*fmtfunc)(struct file *file, void *priv, struct v4l2_format *f);
-
-/*
- * Conversion function that converts a single-planar format to a
- * single-plane multiplanar format.
- */
-void fmt_sp2mp(const struct v4l2_format *sp_fmt, struct v4l2_format *mp_fmt);
-int fmt_sp2mp_func(struct file *file, void *priv,
-		struct v4l2_format *f, fmtfunc func);
 
 extern const struct v4l2_dv_timings_cap vivid_dv_timings_cap;
 
diff --git a/drivers/media/platform/vivid/vivid-vid-out.c b/drivers/media/platform/vivid/vivid-vid-out.c
index e61b91b414f9..c42ba5ade6cf 100644
--- a/drivers/media/platform/vivid/vivid-vid-out.c
+++ b/drivers/media/platform/vivid/vivid-vid-out.c
@@ -612,7 +612,7 @@  int vidioc_g_fmt_vid_out(struct file *file, void *priv,
 
 	if (dev->multiplanar)
 		return -ENOTTY;
-	return fmt_sp2mp_func(file, priv, f, vivid_g_fmt_vid_out);
+	return v4l2_fmt_sp2mp_func(file, priv, f, vivid_g_fmt_vid_out);
 }
 
 int vidioc_try_fmt_vid_out(struct file *file, void *priv,
@@ -622,7 +622,7 @@  int vidioc_try_fmt_vid_out(struct file *file, void *priv,
 
 	if (dev->multiplanar)
 		return -ENOTTY;
-	return fmt_sp2mp_func(file, priv, f, vivid_try_fmt_vid_out);
+	return v4l2_fmt_sp2mp_func(file, priv, f, vivid_try_fmt_vid_out);
 }
 
 int vidioc_s_fmt_vid_out(struct file *file, void *priv,
@@ -632,7 +632,7 @@  int vidioc_s_fmt_vid_out(struct file *file, void *priv,
 
 	if (dev->multiplanar)
 		return -ENOTTY;
-	return fmt_sp2mp_func(file, priv, f, vivid_s_fmt_vid_out);
+	return v4l2_fmt_sp2mp_func(file, priv, f, vivid_s_fmt_vid_out);
 }
 
 int vivid_vid_out_g_selection(struct file *file, void *priv,
diff --git a/drivers/media/v4l2-core/v4l2-common.c b/drivers/media/v4l2-core/v4l2-common.c
index 779e44d6db43..d118f8f34d32 100644
--- a/drivers/media/v4l2-core/v4l2-common.c
+++ b/drivers/media/v4l2-core/v4l2-common.c
@@ -653,3 +653,65 @@  int v4l2_fill_pixfmt(struct v4l2_pix_format *pixfmt, int pixelformat, int width,
 	return 0;
 }
 EXPORT_SYMBOL_GPL(v4l2_fill_pixfmt);
+
+/*
+ * Conversion functions that convert a single-planar format to a
+ * multi-planar format.
+ */
+void v4l2_fmt_sp2mp(const struct v4l2_format *sp_fmt,
+		struct v4l2_format *mp_fmt)
+{
+	struct v4l2_pix_format_mplane *mp = &mp_fmt->fmt.pix_mp;
+	struct v4l2_plane_pix_format *ppix = &mp->plane_fmt[0];
+	const struct v4l2_pix_format *pix = &sp_fmt->fmt.pix;
+	bool is_out = sp_fmt->type == V4L2_BUF_TYPE_VIDEO_OUTPUT;
+
+	memset(mp->reserved, 0, sizeof(mp->reserved));
+	mp_fmt->type = is_out ? V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE :
+			   V4L2_CAP_VIDEO_CAPTURE_MPLANE;
+	mp->width = pix->width;
+	mp->height = pix->height;
+	mp->pixelformat = pix->pixelformat;
+	mp->field = pix->field;
+	mp->colorspace = pix->colorspace;
+	mp->xfer_func = pix->xfer_func;
+	/* Also copies hsv_enc */
+	mp->ycbcr_enc = pix->ycbcr_enc;
+	mp->quantization = pix->quantization;
+	mp->num_planes = 1;
+	mp->flags = pix->flags;
+	ppix->sizeimage = pix->sizeimage;
+	ppix->bytesperline = pix->bytesperline;
+	memset(ppix->reserved, 0, sizeof(ppix->reserved));
+}
+EXPORT_SYMBOL_GPL(v4l2_fmt_sp2mp);
+
+int v4l2_fmt_sp2mp_func(struct file *file, void *priv,
+		struct v4l2_format *f, v4l2_fmtfunc func)
+{
+	struct v4l2_format fmt;
+	struct v4l2_pix_format_mplane *mp = &fmt.fmt.pix_mp;
+	struct v4l2_plane_pix_format *ppix = &mp->plane_fmt[0];
+	struct v4l2_pix_format *pix = &f->fmt.pix;
+	int ret;
+
+	/* Converts to a mplane format */
+	v4l2_fmt_sp2mp(f, &fmt);
+	/* Passes it to the generic mplane format function */
+	ret = func(file, priv, &fmt);
+	/* Copies back the mplane data to the single plane format */
+	pix->width = mp->width;
+	pix->height = mp->height;
+	pix->pixelformat = mp->pixelformat;
+	pix->field = mp->field;
+	pix->colorspace = mp->colorspace;
+	pix->xfer_func = mp->xfer_func;
+	/* Also copies hsv_enc */
+	pix->ycbcr_enc = mp->ycbcr_enc;
+	pix->quantization = mp->quantization;
+	pix->sizeimage = ppix->sizeimage;
+	pix->bytesperline = ppix->bytesperline;
+	pix->flags = mp->flags;
+	return ret;
+}
+EXPORT_SYMBOL_GPL(v4l2_fmt_sp2mp_func);
diff --git a/include/media/v4l2-common.h b/include/media/v4l2-common.h
index 937b74a946cd..d106f36ebaf4 100644
--- a/include/media/v4l2-common.h
+++ b/include/media/v4l2-common.h
@@ -424,4 +424,35 @@  int v4l2_fill_pixfmt(struct v4l2_pix_format *pixfmt, int pixelformat,
 int v4l2_fill_pixfmt_mp(struct v4l2_pix_format_mplane *pixfmt, int pixelformat,
 			int width, int height);
 
+/**
+ * v4l2_fmtfunc - type to be used by v4l2_fmt_sp2mp_func to pass the generic
+ * mp function as argument
+ * @file: device's descriptor file
+ * @priv: private data pointer
+ * @f: format that holds a mp pixel format
+ */
+typedef int (*v4l2_fmtfunc)(struct file *file, void *priv,
+		struct v4l2_format *f);
+
+/**
+ * v4l2_fmt_sp2mp - transforms a single-planar format struct into a multi-planar
+ * struct
+ * @sp_fmt: pointer to the single-planar format struct (in)
+ * @mp_fmt: pointer to the multi-planar format struct (out)
+ */
+void v4l2_fmt_sp2mp(const struct v4l2_format *sp_fmt,
+		struct v4l2_format *mp_fmt);
+
+/**
+ * v4l2_fmt_sp2mp_func - handler to call a generic multi-planar format function
+ * using single-planar format. It converts the sp to a mp, calls the
+ * function and converts mp back to sp.
+ * @file: device's descriptor file
+ * @priv: private data pointer
+ * @f: format that holds a sp pixel format
+ * @func: generic mp function
+ */
+int v4l2_fmt_sp2mp_func(struct file *file, void *priv,
+		struct v4l2_format *f, v4l2_fmtfunc func);
+
 #endif /* V4L2_COMMON_H_ */

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