1 /* 2 * SoC-camera Media Bus API extensions 3 * 4 * Copyright (C) 2009, Guennadi Liakhovetski <g.liakhovetski@gmx.de> 5 * 6 * This program is free software; you can redistribute it and/or modify 7 * it under the terms of the GNU General Public License version 2 as 8 * published by the Free Software Foundation. 9 */ 10 11 #ifndef SOC_MEDIABUS_H 12 #define SOC_MEDIABUS_H 13 14 #include <linux/videodev2.h> 15 #include <linux/v4l2-mediabus.h> 16 17 /** 18 * enum soc_mbus_packing - data packing types on the media-bus 19 * @SOC_MBUS_PACKING_NONE: no packing, bit-for-bit transfer to RAM, one 20 * sample represents one pixel 21 * @SOC_MBUS_PACKING_2X8_PADHI: 16 bits transferred in 2 8-bit samples, in the 22 * possibly incomplete byte high bits are padding 23 * @SOC_MBUS_PACKING_2X8_PADLO: as above, but low bits are padding 24 * @SOC_MBUS_PACKING_EXTEND16: sample width (e.g., 10 bits) has to be extended 25 * to 16 bits 26 * @SOC_MBUS_PACKING_VARIABLE: compressed formats with variable packing 27 * @SOC_MBUS_PACKING_1_5X8: used for packed YUV 4:2:0 formats, where 4 28 * pixels occupy 6 bytes in RAM 29 */ 30 enum soc_mbus_packing { 31 SOC_MBUS_PACKING_NONE, 32 SOC_MBUS_PACKING_2X8_PADHI, 33 SOC_MBUS_PACKING_2X8_PADLO, 34 SOC_MBUS_PACKING_EXTEND16, 35 SOC_MBUS_PACKING_VARIABLE, 36 SOC_MBUS_PACKING_1_5X8, 37 }; 38 39 /** 40 * enum soc_mbus_order - sample order on the media bus 41 * @SOC_MBUS_ORDER_LE: least significant sample first 42 * @SOC_MBUS_ORDER_BE: most significant sample first 43 */ 44 enum soc_mbus_order { 45 SOC_MBUS_ORDER_LE, 46 SOC_MBUS_ORDER_BE, 47 }; 48 49 /** 50 * struct soc_mbus_pixelfmt - Data format on the media bus 51 * @name: Name of the format 52 * @fourcc: Fourcc code, that will be obtained if the data is 53 * stored in memory in the following way: 54 * @packing: Type of sample-packing, that has to be used 55 * @order: Sample order when storing in memory 56 * @bits_per_sample: How many bits the bridge has to sample 57 */ 58 struct soc_mbus_pixelfmt { 59 const char *name; 60 u32 fourcc; 61 enum soc_mbus_packing packing; 62 enum soc_mbus_order order; 63 u8 bits_per_sample; 64 }; 65 66 /** 67 * struct soc_mbus_lookup - Lookup FOURCC IDs by mediabus codes for pass-through 68 * @code: mediabus pixel-code 69 * @fmt: pixel format description 70 */ 71 struct soc_mbus_lookup { 72 enum v4l2_mbus_pixelcode code; 73 struct soc_mbus_pixelfmt fmt; 74 }; 75 76 const struct soc_mbus_pixelfmt *soc_mbus_find_fmtdesc( 77 enum v4l2_mbus_pixelcode code, 78 const struct soc_mbus_lookup *lookup, 79 int n); 80 const struct soc_mbus_pixelfmt *soc_mbus_get_fmtdesc( 81 enum v4l2_mbus_pixelcode code); 82 s32 soc_mbus_bytes_per_line(u32 width, const struct soc_mbus_pixelfmt *mf); 83 int soc_mbus_samples_per_pixel(const struct soc_mbus_pixelfmt *mf, 84 unsigned int *numerator, unsigned int *denominator); 85 unsigned int soc_mbus_config_compatible(const struct v4l2_mbus_config *cfg, 86 unsigned int flags); 87 88 #endif 89