v4l2_subdev_enum_mbus_code() enumerates over supported media bus formats on
a pad.
Signed-off-by: Sakari Ailus <sakari.ailus@xxxxxx>
---
src/v4l2subdev.c | 23 +++++++++++++++++++++++
src/v4l2subdev.h | 14 ++++++++++++++
2 files changed, 37 insertions(+), 0 deletions(-)
diff --git a/src/v4l2subdev.c b/src/v4l2subdev.c
index d60bd7e..6b6df0a 100644
--- a/src/v4l2subdev.c
+++ b/src/v4l2subdev.c
@@ -58,6 +58,29 @@ void v4l2_subdev_close(struct media_entity *entity)
entity->fd = -1;
}
+int v4l2_subdev_enum_mbus_code(struct media_entity *entity,
+ uint32_t *code, uint32_t pad, uint32_t index)
+{
+ struct v4l2_subdev_mbus_code_enum c;
+ int ret;
+
+ ret = v4l2_subdev_open(entity);
+ if (ret < 0)
+ return ret;
+
+ memset(&c, 0, sizeof(c));
+ c.pad = pad;
+ c.index = index;
+
+ ret = ioctl(entity->fd, VIDIOC_SUBDEV_ENUM_MBUS_CODE, &c);
+ if (ret < 0)
+ return -errno;
+
+ *code = c.code;
+
+ return 0;
+}
+
int v4l2_subdev_get_format(struct media_entity *entity,
struct v4l2_mbus_framefmt *format, unsigned int pad,
enum v4l2_subdev_format_whence which)
diff --git a/src/v4l2subdev.h b/src/v4l2subdev.h
index 5d55482..1cca7b9 100644
--- a/src/v4l2subdev.h
+++ b/src/v4l2subdev.h
@@ -22,6 +22,7 @@
#ifndef __SUBDEV_H__
#define __SUBDEV_H__
+#include <stdint.h>
#include <linux/v4l2-subdev.h>
struct media_entity;
@@ -47,6 +48,19 @@ int v4l2_subdev_open(struct media_entity *entity);
void v4l2_subdev_close(struct media_entity *entity);
/**
+ * @brief Enumerate mbus pixel codes.
+ * @param entity - subdev-device media entity.
+ * @param code - mbus pixel code
+ *
+ * Enumerate media bus pixel codes. This is just a wrapper for
+ * VIDIOC_SUBDEV_ENUM_MBUS_CODE IOCTL.
+ *
+ * @return 0 on success, or a negative error code on failure.
+ */
+int v4l2_subdev_enum_mbus_code(struct media_entity *entity,
+ uint32_t *code, uint32_t pad, uint32_t index);
+
+/**
* @brief Retrieve the format on a pad.
* @param entity - subdev-device media entity.
* @param format - format to be filled.
--
1.7.2.5
--
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