This makes format parsing a part of the libv4l2subdev and thus available on
all who use the library.

Signed-off-by: Sakari Ailus <sakari.ai...@iki.fi>
---
 src/main.c       |  340 +-----------------------------------------------------
 src/v4l2subdev.c |  343 ++++++++++++++++++++++++++++++++++++++++++++++++++++++
 src/v4l2subdev.h |   37 ++++++
 3 files changed, 382 insertions(+), 338 deletions(-)

diff --git a/src/main.c b/src/main.c
index 02cdecd..0d68ff6 100644
--- a/src/main.c
+++ b/src/main.c
@@ -45,61 +45,6 @@
  * Printing
  */
 
-static struct {
-       const char *name;
-       enum v4l2_mbus_pixelcode code;
-} mbus_formats[] = {
-       { "Y8", V4L2_MBUS_FMT_Y8_1X8},
-       { "Y10", V4L2_MBUS_FMT_Y10_1X10 },
-       { "Y12", V4L2_MBUS_FMT_Y12_1X12 },
-       { "YUYV", V4L2_MBUS_FMT_YUYV8_1X16 },
-       { "UYVY", V4L2_MBUS_FMT_UYVY8_1X16 },
-       { "SBGGR8", V4L2_MBUS_FMT_SBGGR8_1X8 },
-       { "SGBRG8", V4L2_MBUS_FMT_SGBRG8_1X8 },
-       { "SGRBG8", V4L2_MBUS_FMT_SGRBG8_1X8 },
-       { "SRGGB8", V4L2_MBUS_FMT_SRGGB8_1X8 },
-       { "SBGGR10", V4L2_MBUS_FMT_SBGGR10_1X10 },
-       { "SGBRG10", V4L2_MBUS_FMT_SGBRG10_1X10 },
-       { "SGRBG10", V4L2_MBUS_FMT_SGRBG10_1X10 },
-       { "SRGGB10", V4L2_MBUS_FMT_SRGGB10_1X10 },
-       { "SBGGR10_DPCM8", V4L2_MBUS_FMT_SBGGR10_DPCM8_1X8 },
-       { "SGBRG10_DPCM8", V4L2_MBUS_FMT_SGBRG10_DPCM8_1X8 },
-       { "SGRBG10_DPCM8", V4L2_MBUS_FMT_SGRBG10_DPCM8_1X8 },
-       { "SRGGB10_DPCM8", V4L2_MBUS_FMT_SRGGB10_DPCM8_1X8 },
-       { "SBGGR12", V4L2_MBUS_FMT_SBGGR12_1X12 },
-       { "SGBRG12", V4L2_MBUS_FMT_SGBRG12_1X12 },
-       { "SGRBG12", V4L2_MBUS_FMT_SGRBG12_1X12 },
-       { "SRGGB12", V4L2_MBUS_FMT_SRGGB12_1X12 },
-};
-
-static const char *pixelcode_to_string(enum v4l2_mbus_pixelcode code)
-{
-       unsigned int i;
-
-       for (i = 0; i < ARRAY_SIZE(mbus_formats); ++i) {
-               if (mbus_formats[i].code == code)
-                       return mbus_formats[i].name;
-       }
-
-       return "unknown";
-}
-
-static enum v4l2_mbus_pixelcode string_to_pixelcode(const char *string,
-                                            unsigned int length)
-{
-       unsigned int i;
-
-       for (i = 0; i < ARRAY_SIZE(mbus_formats); ++i) {
-               if (strncmp(mbus_formats[i].name, string, length) == 0)
-                       break;
-       }
-
-       if (i == ARRAY_SIZE(mbus_formats))
-               return (enum v4l2_mbus_pixelcode)-1;
-
-       return mbus_formats[i].code;
-}
-
 static void v4l2_subdev_print_format(struct media_entity *entity,
        unsigned int pad, enum v4l2_subdev_format_whence which)
 {
@@ -111,7 +56,7 @@ static void v4l2_subdev_print_format(struct media_entity 
*entity,
        if (ret != 0)
                return;
 
-       printf("[%s %ux%u", pixelcode_to_string(format.code),
+       printf("[%s %ux%u", v4l2_subdev_pixelcode_to_string(format.code),
               format.width, format.height);
 
        ret = v4l2_subdev_get_crop(entity, &rect, pad, which);
@@ -334,287 +279,6 @@ void media_print_topology(struct media_device *media, int 
dot)
                media_print_topology_text(media);
 }
 
-/* 
-----------------------------------------------------------------------------
- * Formats setup
- */
-
-static int parse_format(struct v4l2_mbus_framefmt *format, const char *p, char 
**endp)
-{
-       enum v4l2_mbus_pixelcode code;
-       unsigned int width, height;
-       char *end;
-
-       for (; isspace(*p); ++p);
-       for (end = (char *)p; !isspace(*end) && *end != '\0'; ++end);
-
-       code = string_to_pixelcode(p, end - p);
-       if (code == (enum v4l2_mbus_pixelcode)-1)
-               return -EINVAL;
-
-       for (p = end; isspace(*p); ++p);
-       width = strtoul(p, &end, 10);
-       if (*end != 'x')
-               return -EINVAL;
-
-       p = end + 1;
-       height = strtoul(p, &end, 10);
-       *endp = end;
-
-       memset(format, 0, sizeof(*format));
-       format->width = width;
-       format->height = height;
-       format->code = code;
-
-       return 0;
-}
-
-static int parse_crop(struct v4l2_rect *crop, const char *p, char **endp)
-{
-       char *end;
-
-       if (*p++ != '(')
-               return -EINVAL;
-
-       crop->left = strtoul(p, &end, 10);
-       if (*end != ',')
-               return -EINVAL;
-
-       p = end + 1;
-       crop->top = strtoul(p, &end, 10);
-       if (*end++ != ')')
-               return -EINVAL;
-       if (*end != '/')
-               return -EINVAL;
-
-       p = end + 1;
-       crop->width = strtoul(p, &end, 10);
-       if (*end != 'x')
-               return -EINVAL;
-
-       p = end + 1;
-       crop->height = strtoul(p, &end, 10);
-       *endp = end;
-
-       return 0;
-}
-
-static int parse_frame_interval(struct v4l2_fract *interval, const char *p, 
char **endp)
-{
-       char *end;
-
-       for (; isspace(*p); ++p);
-
-       interval->numerator = strtoul(p, &end, 10);
-
-       for (p = end; isspace(*p); ++p);
-       if (*p++ != '/')
-               return -EINVAL;
-
-       for (; isspace(*p); ++p);
-       interval->denominator = strtoul(p, &end, 10);
-
-       *endp = end;
-       return 0;
-}
-
-static struct media_pad *parse_pad_format(struct media_device *media,
-       struct v4l2_mbus_framefmt *format, struct v4l2_rect *crop,
-       struct v4l2_fract *interval, const char *p, char **endp)
-{
-       struct media_pad *pad;
-       char *end;
-       int ret;
-
-       for (; isspace(*p); ++p);
-
-       pad = media_parse_pad(media, p, &end);
-       if (pad == NULL)
-               return NULL;
-
-       for (p = end; isspace(*p); ++p);
-       if (*p++ != '[')
-               return NULL;
-
-       for (; isspace(*p); ++p);
-
-       if (isalnum(*p)) {
-               ret = parse_format(format, p, &end);
-               if (ret < 0)
-                       return NULL;
-
-               for (p = end; isspace(*p); p++);
-       }
-
-       if (*p == '(') {
-               ret = parse_crop(crop, p, &end);
-               if (ret < 0)
-                       return NULL;
-
-               for (p = end; isspace(*p); p++);
-       }
-
-       if (*p == '@') {
-               ret = parse_frame_interval(interval, ++p, &end);
-               if (ret < 0)
-                       return NULL;
-
-               for (p = end; isspace(*p); p++);
-       }
-
-       if (*p != ']')
-               return NULL;
-
-       *endp = (char *)p + 1;
-       return pad;
-}
-
-static int set_format(struct media_pad *pad, struct v4l2_mbus_framefmt *format)
-{
-       int ret;
-
-       if (format->width == 0 || format->height == 0)
-               return 0;
-
-       printf("Setting up format %s %ux%u on pad %s/%u\n",
-               pixelcode_to_string(format->code), format->width, 
format->height,
-               pad->entity->info.name, pad->index);
-
-       ret = v4l2_subdev_set_format(pad->entity, format, pad->index,
-                                    V4L2_SUBDEV_FORMAT_ACTIVE);
-       if (ret < 0) {
-               printf("Unable to set format: %s (%d)\n", strerror(-ret), ret);
-               return ret;
-       }
-
-       printf("Format set: %s %ux%u\n",
-               pixelcode_to_string(format->code), format->width, 
format->height);
-
-       return 0;
-}
-
-static int set_crop(struct media_pad *pad, struct v4l2_rect *crop)
-{
-       int ret;
-
-       if (crop->left == -1 || crop->top == -1)
-               return 0;
-
-       printf("Setting up crop rectangle (%u,%u)/%ux%u on pad %s/%u\n",
-               crop->left, crop->top, crop->width, crop->height,
-               pad->entity->info.name, pad->index);
-
-       ret = v4l2_subdev_set_crop(pad->entity, crop, pad->index,
-                                  V4L2_SUBDEV_FORMAT_ACTIVE);
-       if (ret < 0) {
-               printf("Unable to set crop rectangle: %s (%d)\n", 
strerror(-ret), ret);
-               return ret;
-       }
-
-       printf("Crop rectangle set: (%u,%u)/%ux%u\n",
-               crop->left, crop->top, crop->width, crop->height);
-
-       return 0;
-}
-
-static int set_frame_interval(struct media_entity *entity, struct v4l2_fract 
*interval)
-{
-       int ret;
-
-       if (interval->numerator == 0)
-               return 0;
-
-       printf("Setting up frame interval %u/%u on entity %s\n",
-               interval->numerator, interval->denominator, entity->info.name);
-
-       ret = v4l2_subdev_set_frame_interval(entity, interval);
-       if (ret < 0) {
-               printf("Unable to set frame interval: %s (%d)", strerror(-ret), 
ret);
-               return ret;
-       }
-
-       printf("Frame interval set: %u/%u\n",
-               interval->numerator, interval->denominator);
-
-       return 0;
-}
-
-
-static int setup_format(struct media_device *media, const char *p, char **endp)
-{
-       struct v4l2_mbus_framefmt format = { 0, 0, 0 };
-       struct media_pad *pad;
-       struct v4l2_rect crop = { -1, -1, -1, -1 };
-       struct v4l2_fract interval = { 0, 0 };
-       unsigned int i;
-       char *end;
-       int ret;
-
-       pad = parse_pad_format(media, &format, &crop, &interval, p, &end);
-       if (pad == NULL) {
-               printf("Unable to parse format\n");
-               return -EINVAL;
-       }
-
-       if (pad->flags & MEDIA_PAD_FL_SOURCE) {
-               ret = set_crop(pad, &crop);
-               if (ret < 0)
-                       return ret;
-       }
-
-       ret = set_format(pad, &format);
-       if (ret < 0)
-               return ret;
-
-       if (pad->flags & MEDIA_PAD_FL_SINK) {
-               ret = set_crop(pad, &crop);
-               if (ret < 0)
-                       return ret;
-       }
-
-       ret = set_frame_interval(pad->entity, &interval);
-       if (ret < 0)
-               return ret;
-
-
-       /* If the pad is an output pad, automatically set the same format on
-        * the remote subdev input pads, if any.
-        */
-       if (pad->flags & MEDIA_PAD_FL_SOURCE) {
-               for (i = 0; i < pad->entity->num_links; ++i) {
-                       struct media_link *link = &pad->entity->links[i];
-                       struct v4l2_mbus_framefmt remote_format;
-
-                       if (!(link->flags & MEDIA_LNK_FL_ENABLED))
-                               continue;
-
-                       if (link->source == pad &&
-                           link->sink->entity->info.type == 
MEDIA_ENT_T_V4L2_SUBDEV) {
-                               remote_format = format;
-                               set_format(link->sink, &remote_format);
-                       }
-               }
-       }
-
-       *endp = end;
-       return 0;
-}
-
-static int setup_formats(struct media_device *media, const char *p)
-{
-       char *end;
-       int ret;
-
-       do {
-               ret = setup_format(media, p, &end);
-               if (ret < 0)
-                       return ret;
-
-               p = end + 1;
-       } while (*end == ',');
-
-       return *end ? -EINVAL : 0;
-}
-
 int main(int argc, char **argv)
 {
        struct media_device *media;
@@ -669,7 +333,7 @@ int main(int argc, char **argv)
                media_parse_setup_links(media, media_opts.links);
 
        if (media_opts.formats)
-               setup_formats(media, media_opts.formats);
+               v4l2_subdev_parse_setup_formats(media, media_opts.formats);
 
        if (media_opts.interactive) {
                while (1) {
diff --git a/src/v4l2subdev.c b/src/v4l2subdev.c
index 785209b..0b4793d 100644
--- a/src/v4l2subdev.c
+++ b/src/v4l2subdev.c
@@ -186,3 +186,346 @@ int v4l2_subdev_set_frame_interval(struct media_entity 
*entity,
        *interval = ival.interval;
        return 0;
 }
+
+static int v4l2_subdev_parse_format(struct v4l2_mbus_framefmt *format,
+                                   const char *p, char **endp)
+{
+       enum v4l2_mbus_pixelcode code;
+       unsigned int width, height;
+       char *end;
+
+       for (; isspace(*p); ++p);
+       for (end = (char *)p; !isspace(*end) && *end != '\0'; ++end);
+
+       code = v4l2_subdev_string_to_pixelcode(p, end - p);
+       if (code == (enum v4l2_mbus_pixelcode)-1)
+               return -EINVAL;
+
+       for (p = end; isspace(*p); ++p);
+       width = strtoul(p, &end, 10);
+       if (*end != 'x')
+               return -EINVAL;
+
+       p = end + 1;
+       height = strtoul(p, &end, 10);
+       *endp = end;
+
+       memset(format, 0, sizeof(*format));
+       format->width = width;
+       format->height = height;
+       format->code = code;
+
+       return 0;
+}
+
+static int v4l2_subdev_parse_crop(
+       struct v4l2_rect *crop, const char *p, char **endp)
+{
+       char *end;
+
+       if (*p++ != '(')
+               return -EINVAL;
+
+       crop->left = strtoul(p, &end, 10);
+       if (*end != ',')
+               return -EINVAL;
+
+       p = end + 1;
+       crop->top = strtoul(p, &end, 10);
+       if (*end++ != ')')
+               return -EINVAL;
+       if (*end != '/')
+               return -EINVAL;
+
+       p = end + 1;
+       crop->width = strtoul(p, &end, 10);
+       if (*end != 'x')
+               return -EINVAL;
+
+       p = end + 1;
+       crop->height = strtoul(p, &end, 10);
+       *endp = end;
+
+       return 0;
+}
+
+static int v4l2_subdev_parse_frame_interval(struct v4l2_fract *interval,
+                                           const char *p, char **endp)
+{
+       char *end;
+
+       for (; isspace(*p); ++p);
+
+       interval->numerator = strtoul(p, &end, 10);
+
+       for (p = end; isspace(*p); ++p);
+       if (*p++ != '/')
+               return -EINVAL;
+
+       for (; isspace(*p); ++p);
+       interval->denominator = strtoul(p, &end, 10);
+
+       *endp = end;
+       return 0;
+}
+
+static struct media_pad *v4l2_subdev_parse_pad_format(
+       struct media_device *media, struct v4l2_mbus_framefmt *format,
+       struct v4l2_rect *crop, struct v4l2_fract *interval, const char *p,
+       char **endp)
+{
+       struct media_pad *pad;
+       char *end;
+       int ret;
+
+       for (; isspace(*p); ++p);
+
+       pad = media_parse_pad(media, p, &end);
+       if (pad == NULL)
+               return NULL;
+
+       for (p = end; isspace(*p); ++p);
+       if (*p++ != '[')
+               return NULL;
+
+       for (; isspace(*p); ++p);
+
+       if (isalnum(*p)) {
+               ret = v4l2_subdev_parse_format(format, p, &end);
+               if (ret < 0)
+                       return NULL;
+
+               for (p = end; isspace(*p); p++);
+       }
+
+       if (*p == '(') {
+               ret = v4l2_subdev_parse_crop(crop, p, &end);
+               if (ret < 0)
+                       return NULL;
+
+               for (p = end; isspace(*p); p++);
+       }
+
+       if (*p == '@') {
+               ret = v4l2_subdev_parse_frame_interval(interval, ++p, &end);
+               if (ret < 0)
+                       return NULL;
+
+               for (p = end; isspace(*p); p++);
+       }
+
+       if (*p != ']')
+               return NULL;
+
+       *endp = (char *)p + 1;
+       return pad;
+}
+
+static int set_format(struct media_pad *pad,
+                     struct v4l2_mbus_framefmt *format)
+{
+       int ret;
+
+       if (format->width == 0 || format->height == 0)
+               return 0;
+
+       printf("Setting up format %s %ux%u on pad %s/%u\n",
+              v4l2_subdev_pixelcode_to_string(format->code),
+              format->width, format->height,
+              pad->entity->info.name, pad->index);
+
+       ret = v4l2_subdev_set_format(pad->entity, format, pad->index,
+                                    V4L2_SUBDEV_FORMAT_ACTIVE);
+       if (ret < 0) {
+               printf("Unable to set format: %s (%d)\n", strerror(-ret), ret);
+               return ret;
+       }
+
+       printf("Format set: %s %ux%u\n",
+              v4l2_subdev_pixelcode_to_string(format->code),
+              format->width, format->height);
+
+       return 0;
+}
+
+static int set_crop(struct media_pad *pad, struct v4l2_rect *crop)
+{
+       int ret;
+
+       if (crop->left == -1 || crop->top == -1)
+               return 0;
+
+       printf("Setting up crop rectangle (%u,%u)/%ux%u on pad %s/%u\n",
+               crop->left, crop->top, crop->width, crop->height,
+               pad->entity->info.name, pad->index);
+
+       ret = v4l2_subdev_set_crop(pad->entity, crop, pad->index,
+                                  V4L2_SUBDEV_FORMAT_ACTIVE);
+       if (ret < 0) {
+               printf("Unable to set crop rectangle: %s (%d)\n", 
strerror(-ret), ret);
+               return ret;
+       }
+
+       printf("Crop rectangle set: (%u,%u)/%ux%u\n",
+               crop->left, crop->top, crop->width, crop->height);
+
+       return 0;
+}
+
+static int set_frame_interval(struct media_entity *entity,
+                             struct v4l2_fract *interval)
+{
+       int ret;
+
+       if (interval->numerator == 0)
+               return 0;
+
+       printf("Setting up frame interval %u/%u on entity %s\n",
+               interval->numerator, interval->denominator, entity->info.name);
+
+       ret = v4l2_subdev_set_frame_interval(entity, interval);
+       if (ret < 0) {
+               printf("Unable to set frame interval: %s (%d)", strerror(-ret), 
ret);
+               return ret;
+       }
+
+       printf("Frame interval set: %u/%u\n",
+               interval->numerator, interval->denominator);
+
+       return 0;
+}
+
+
+static int v4l2_subdev_parse_setup_format(struct media_device *media,
+                                         const char *p, char **endp)
+{
+       struct v4l2_mbus_framefmt format = { 0, 0, 0 };
+       struct media_pad *pad;
+       struct v4l2_rect crop = { -1, -1, -1, -1 };
+       struct v4l2_fract interval = { 0, 0 };
+       unsigned int i;
+       char *end;
+       int ret;
+
+       pad = v4l2_subdev_parse_pad_format(media, &format, &crop, &interval,
+                                          p, &end);
+       if (pad == NULL) {
+               printf("Unable to parse format\n");
+               return -EINVAL;
+       }
+
+       if (pad->flags & MEDIA_PAD_FL_SOURCE) {
+               ret = set_crop(pad, &crop);
+               if (ret < 0)
+                       return ret;
+       }
+
+       ret = set_format(pad, &format);
+       if (ret < 0)
+               return ret;
+
+       if (pad->flags & MEDIA_PAD_FL_SINK) {
+               ret = set_crop(pad, &crop);
+               if (ret < 0)
+                       return ret;
+       }
+
+       ret = set_frame_interval(pad->entity, &interval);
+       if (ret < 0)
+               return ret;
+
+
+       /* If the pad is an output pad, automatically set the same format on
+        * the remote subdev input pads, if any.
+        */
+       if (pad->flags & MEDIA_PAD_FL_SOURCE) {
+               for (i = 0; i < pad->entity->num_links; ++i) {
+                       struct media_link *link = &pad->entity->links[i];
+                       struct v4l2_mbus_framefmt remote_format;
+
+                       if (!(link->flags & MEDIA_LNK_FL_ENABLED))
+                               continue;
+
+                       if (link->source == pad &&
+                           link->sink->entity->info.type == 
MEDIA_ENT_T_V4L2_SUBDEV) {
+                               remote_format = format;
+                               set_format(link->sink, &remote_format);
+                       }
+               }
+       }
+
+       *endp = end;
+       return 0;
+}
+
+int v4l2_subdev_parse_setup_formats(struct media_device *media, const char *p)
+{
+       char *end;
+       int ret;
+
+       do {
+               ret = v4l2_subdev_parse_setup_format(media, p, &end);
+               if (ret < 0)
+                       return ret;
+
+               p = end + 1;
+       } while (*end == ',');
+
+       return *end ? -EINVAL : 0;
+}
+
+static struct {
+       const char *name;
+       enum v4l2_mbus_pixelcode code;
+} mbus_formats[] = {
+       { "Y8", V4L2_MBUS_FMT_Y8_1X8},
+       { "Y10", V4L2_MBUS_FMT_Y10_1X10 },
+       { "Y12", V4L2_MBUS_FMT_Y12_1X12 },
+       { "YUYV", V4L2_MBUS_FMT_YUYV8_1X16 },
+       { "UYVY", V4L2_MBUS_FMT_UYVY8_1X16 },
+       { "SBGGR8", V4L2_MBUS_FMT_SBGGR8_1X8 },
+       { "SGBRG8", V4L2_MBUS_FMT_SGBRG8_1X8 },
+       { "SGRBG8", V4L2_MBUS_FMT_SGRBG8_1X8 },
+       { "SRGGB8", V4L2_MBUS_FMT_SRGGB8_1X8 },
+       { "SBGGR10", V4L2_MBUS_FMT_SBGGR10_1X10 },
+       { "SGBRG10", V4L2_MBUS_FMT_SGBRG10_1X10 },
+       { "SGRBG10", V4L2_MBUS_FMT_SGRBG10_1X10 },
+       { "SRGGB10", V4L2_MBUS_FMT_SRGGB10_1X10 },
+       { "SBGGR10_DPCM8", V4L2_MBUS_FMT_SBGGR10_DPCM8_1X8 },
+       { "SGBRG10_DPCM8", V4L2_MBUS_FMT_SGBRG10_DPCM8_1X8 },
+       { "SGRBG10_DPCM8", V4L2_MBUS_FMT_SGRBG10_DPCM8_1X8 },
+       { "SRGGB10_DPCM8", V4L2_MBUS_FMT_SRGGB10_DPCM8_1X8 },
+       { "SBGGR12", V4L2_MBUS_FMT_SBGGR12_1X12 },
+       { "SGBRG12", V4L2_MBUS_FMT_SGBRG12_1X12 },
+       { "SGRBG12", V4L2_MBUS_FMT_SGRBG12_1X12 },
+       { "SRGGB12", V4L2_MBUS_FMT_SRGGB12_1X12 },
+};
+
+const char *v4l2_subdev_pixelcode_to_string(enum v4l2_mbus_pixelcode code)
+{
+       unsigned int i;
+
+       for (i = 0; i < ARRAY_SIZE(mbus_formats); ++i) {
+               if (mbus_formats[i].code == code)
+                       return mbus_formats[i].name;
+       }
+
+       return "unknown";
+}
+
+enum v4l2_mbus_pixelcode v4l2_subdev_string_to_pixelcode(const char *string,
+                                                        unsigned int length)
+{
+       unsigned int i;
+
+       for (i = 0; i < ARRAY_SIZE(mbus_formats); ++i) {
+               if (strncmp(mbus_formats[i].name, string, length) == 0)
+                       break;
+       }
+
+       if (i == ARRAY_SIZE(mbus_formats))
+               return (enum v4l2_mbus_pixelcode)-1;
+
+       return mbus_formats[i].code;
+}
+
diff --git a/src/v4l2subdev.h b/src/v4l2subdev.h
index b5772e0..db85491 100644
--- a/src/v4l2subdev.h
+++ b/src/v4l2subdev.h
@@ -158,5 +158,42 @@ int v4l2_subdev_get_frame_interval(struct media_entity 
*entity,
 int v4l2_subdev_set_frame_interval(struct media_entity *entity,
        struct v4l2_fract *interval);
 
+/**
+ * @brief Parse a string and apply format, crop and frame interval settings.
+ * @param media - media device.
+ * @param p - input string
+ * @param endp - pointer to string p where parsing ended (return)
+ *
+ * Parse string @a p and apply format, crop and frame interval settings to a
+ * subdev pad specified in @a p. @a endp will be written a pointer where
+ * parsing of @a p ended.
+ *
+ * Format strings are separeted by commas (,).
+ *
+ * @return 0 on success, or a negative error code on failure.
+ */
+int v4l2_subdev_parse_setup_formats(struct media_device *media, const char *p);
+
+/**
+ * @brief Convert media bus pixel code to string.
+ * @param code - input string
+ *
+ * Convert media bus pixel code @a code to a human-readable string.
+ *
+ * @return A pointer to a string on success, NULL on failure.
+ */
+const char *v4l2_subdev_pixelcode_to_string(enum v4l2_mbus_pixelcode code);
+
+/**
+ * @brief Parse string to media bus pixel code.
+ * @param string - input string
+ * @param lenght - length of the string
+ *
+ * Parse human readable string @a string to an media bus pixel code.
+ *
+ * @return media bus pixelcode on success, -1 on failure.
+ */
+enum v4l2_mbus_pixelcode v4l2_subdev_string_to_pixelcode(const char *string,
+                                                        unsigned int length);
 #endif
 
-- 
1.7.2.5

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