media: imx: utils: Constify some mbus and ipu_image arguments

The imx_media_mbus_fmt_to_pix_fmt() and imx_media_mbus_fmt_to_ipu_image()
functions do not need to modify their mbus argument, and
imx_media_ipu_image_to_mbus_fmt() does not need to modify its ipu_image
argument. Make them const.

[slongerbeam@gmail.com: Constified mbus arg to
 imx_media_mbus_fmt_to_ipu_image(), and ipu_image
 arg to imx_media_ipu_image_to_mbus_fmt(), as well]
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Steve Longerbeam <slongerbeam@gmail.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>

drivers/staging/media/imx/imx-media-utils.c

@@ -497,7 +497,7 @@ void imx_media_try_colorimetry(struct v4l2_mbus_framefmt *tryfmt,
 EXPORT_SYMBOL_GPL(imx_media_try_colorimetry);
 
 int imx_media_mbus_fmt_to_pix_fmt(struct v4l2_pix_format *pix,
-				  struct v4l2_mbus_framefmt *mbus,
+				  const struct v4l2_mbus_framefmt *mbus,
 				  const struct imx_media_pixfmt *cc)
 {
 	u32 width;
@@ -550,7 +550,7 @@ int imx_media_mbus_fmt_to_pix_fmt(struct v4l2_pix_format *pix,
 EXPORT_SYMBOL_GPL(imx_media_mbus_fmt_to_pix_fmt);
 
 int imx_media_mbus_fmt_to_ipu_image(struct ipu_image *image,
-				    struct v4l2_mbus_framefmt *mbus)
+				    const struct v4l2_mbus_framefmt *mbus)
 {
 	int ret;
 
@@ -568,7 +568,7 @@ int imx_media_mbus_fmt_to_ipu_image(struct ipu_image *image,
 EXPORT_SYMBOL_GPL(imx_media_mbus_fmt_to_ipu_image);
 
 int imx_media_ipu_image_to_mbus_fmt(struct v4l2_mbus_framefmt *mbus,
-				    struct ipu_image *image)
+				    const struct ipu_image *image)
 {
 	const struct imx_media_pixfmt *fmt;
 

drivers/staging/media/imx/imx-media.h

@@ -194,12 +194,12 @@ int imx_media_init_cfg(struct v4l2_subdev *sd,
 void imx_media_try_colorimetry(struct v4l2_mbus_framefmt *tryfmt,
 			       bool ic_route);
 int imx_media_mbus_fmt_to_pix_fmt(struct v4l2_pix_format *pix,
-				  struct v4l2_mbus_framefmt *mbus,
+				  const struct v4l2_mbus_framefmt *mbus,
 				  const struct imx_media_pixfmt *cc);
 int imx_media_mbus_fmt_to_ipu_image(struct ipu_image *image,
-				    struct v4l2_mbus_framefmt *mbus);
+				    const struct v4l2_mbus_framefmt *mbus);
 int imx_media_ipu_image_to_mbus_fmt(struct v4l2_mbus_framefmt *mbus,
-				    struct ipu_image *image);
+				    const struct ipu_image *image);
 void imx_media_grp_id_to_sd_name(char *sd_name, int sz,
 				 u32 grp_id, int ipu_id);
 struct v4l2_subdev *