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-rw-r--r--include/media/soc_mediabus.h112
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diff --git a/include/media/soc_mediabus.h b/include/media/soc_mediabus.h
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+/*
+ * SoC-camera Media Bus API extensions
+ *
+ * Copyright (C) 2009, Guennadi Liakhovetski <g.liakhovetski@gmx.de>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#ifndef SOC_MEDIABUS_H
+#define SOC_MEDIABUS_H
+
+#include <linux/videodev2.h>
+#include <linux/v4l2-mediabus.h>
+
+/**
+ * enum soc_mbus_packing - data packing types on the media-bus
+ * @SOC_MBUS_PACKING_NONE: no packing, bit-for-bit transfer to RAM, one
+ * sample represents one pixel
+ * @SOC_MBUS_PACKING_2X8_PADHI: 16 bits transferred in 2 8-bit samples, in the
+ * possibly incomplete byte high bits are padding
+ * @SOC_MBUS_PACKING_2X8_PADLO: as above, but low bits are padding
+ * @SOC_MBUS_PACKING_EXTEND16: sample width (e.g., 10 bits) has to be extended
+ * to 16 bits
+ * @SOC_MBUS_PACKING_VARIABLE: compressed formats with variable packing
+ * @SOC_MBUS_PACKING_1_5X8: used for packed YUV 4:2:0 formats, where 4
+ * pixels occupy 6 bytes in RAM
+ * @SOC_MBUS_PACKING_EXTEND32: sample width (e.g., 24 bits) has to be extended
+ * to 32 bits
+ */
+enum soc_mbus_packing {
+ SOC_MBUS_PACKING_NONE,
+ SOC_MBUS_PACKING_2X8_PADHI,
+ SOC_MBUS_PACKING_2X8_PADLO,
+ SOC_MBUS_PACKING_EXTEND16,
+ SOC_MBUS_PACKING_VARIABLE,
+ SOC_MBUS_PACKING_1_5X8,
+ SOC_MBUS_PACKING_EXTEND32,
+};
+
+/**
+ * enum soc_mbus_order - sample order on the media bus
+ * @SOC_MBUS_ORDER_LE: least significant sample first
+ * @SOC_MBUS_ORDER_BE: most significant sample first
+ */
+enum soc_mbus_order {
+ SOC_MBUS_ORDER_LE,
+ SOC_MBUS_ORDER_BE,
+};
+
+/**
+ * enum soc_mbus_layout - planes layout in memory
+ * @SOC_MBUS_LAYOUT_PACKED: color components packed
+ * @SOC_MBUS_LAYOUT_PLANAR_2Y_U_V: YUV components stored in 3 planes (4:2:2)
+ * @SOC_MBUS_LAYOUT_PLANAR_2Y_C: YUV components stored in a luma and a
+ * chroma plane (C plane is half the size
+ * of Y plane)
+ * @SOC_MBUS_LAYOUT_PLANAR_Y_C: YUV components stored in a luma and a
+ * chroma plane (C plane is the same size
+ * as Y plane)
+ */
+enum soc_mbus_layout {
+ SOC_MBUS_LAYOUT_PACKED = 0,
+ SOC_MBUS_LAYOUT_PLANAR_2Y_U_V,
+ SOC_MBUS_LAYOUT_PLANAR_2Y_C,
+ SOC_MBUS_LAYOUT_PLANAR_Y_C,
+};
+
+/**
+ * struct soc_mbus_pixelfmt - Data format on the media bus
+ * @name: Name of the format
+ * @fourcc: Fourcc code, that will be obtained if the data is
+ * stored in memory in the following way:
+ * @packing: Type of sample-packing, that has to be used
+ * @order: Sample order when storing in memory
+ * @bits_per_sample: How many bits the bridge has to sample
+ */
+struct soc_mbus_pixelfmt {
+ const char *name;
+ u32 fourcc;
+ enum soc_mbus_packing packing;
+ enum soc_mbus_order order;
+ enum soc_mbus_layout layout;
+ u8 bits_per_sample;
+};
+
+/**
+ * struct soc_mbus_lookup - Lookup FOURCC IDs by mediabus codes for pass-through
+ * @code: mediabus pixel-code
+ * @fmt: pixel format description
+ */
+struct soc_mbus_lookup {
+ u32 code;
+ struct soc_mbus_pixelfmt fmt;
+};
+
+const struct soc_mbus_pixelfmt *soc_mbus_find_fmtdesc(
+ u32 code,
+ const struct soc_mbus_lookup *lookup,
+ int n);
+const struct soc_mbus_pixelfmt *soc_mbus_get_fmtdesc(
+ u32 code);
+s32 soc_mbus_bytes_per_line(u32 width, const struct soc_mbus_pixelfmt *mf);
+s32 soc_mbus_image_size(const struct soc_mbus_pixelfmt *mf,
+ u32 bytes_per_line, u32 height);
+int soc_mbus_samples_per_pixel(const struct soc_mbus_pixelfmt *mf,
+ unsigned int *numerator, unsigned int *denominator);
+unsigned int soc_mbus_config_compatible(const struct v4l2_mbus_config *cfg,
+ unsigned int flags);
+
+#endif