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 * @SOC_MBUS_PACKING_EXTEND32: sample width (e.g., 24 bits) has to be extended 30 * to 32 bits 31 */ 32enum soc_mbus_packing { 33 SOC_MBUS_PACKING_NONE, 34 SOC_MBUS_PACKING_2X8_PADHI, 35 SOC_MBUS_PACKING_2X8_PADLO, 36 SOC_MBUS_PACKING_EXTEND16, 37 SOC_MBUS_PACKING_VARIABLE, 38 SOC_MBUS_PACKING_1_5X8, 39 SOC_MBUS_PACKING_EXTEND32, 40}; 41 42/** 43 * enum soc_mbus_order - sample order on the media bus 44 * @SOC_MBUS_ORDER_LE: least significant sample first 45 * @SOC_MBUS_ORDER_BE: most significant sample first 46 */ 47enum soc_mbus_order { 48 SOC_MBUS_ORDER_LE, 49 SOC_MBUS_ORDER_BE, 50}; 51 52/** 53 * enum soc_mbus_layout - planes layout in memory 54 * @SOC_MBUS_LAYOUT_PACKED: color components packed 55 * @SOC_MBUS_LAYOUT_PLANAR_2Y_U_V: YUV components stored in 3 planes (4:2:2) 56 * @SOC_MBUS_LAYOUT_PLANAR_2Y_C: YUV components stored in a luma and a 57 * chroma plane (C plane is half the size 58 * of Y plane) 59 * @SOC_MBUS_LAYOUT_PLANAR_Y_C: YUV components stored in a luma and a 60 * chroma plane (C plane is the same size 61 * as Y plane) 62 */ 63enum soc_mbus_layout { 64 SOC_MBUS_LAYOUT_PACKED = 0, 65 SOC_MBUS_LAYOUT_PLANAR_2Y_U_V, 66 SOC_MBUS_LAYOUT_PLANAR_2Y_C, 67 SOC_MBUS_LAYOUT_PLANAR_Y_C, 68}; 69 70/** 71 * struct soc_mbus_pixelfmt - Data format on the media bus 72 * @name: Name of the format 73 * @fourcc: Fourcc code, that will be obtained if the data is 74 * stored in memory in the following way: 75 * @packing: Type of sample-packing, that has to be used 76 * @order: Sample order when storing in memory 77 * @bits_per_sample: How many bits the bridge has to sample 78 */ 79struct soc_mbus_pixelfmt { 80 const char *name; 81 u32 fourcc; 82 enum soc_mbus_packing packing; 83 enum soc_mbus_order order; 84 enum soc_mbus_layout layout; 85 u8 bits_per_sample; 86}; 87 88/** 89 * struct soc_mbus_lookup - Lookup FOURCC IDs by mediabus codes for pass-through 90 * @code: mediabus pixel-code 91 * @fmt: pixel format description 92 */ 93struct soc_mbus_lookup { 94 u32 code; 95 struct soc_mbus_pixelfmt fmt; 96}; 97 98const struct soc_mbus_pixelfmt *soc_mbus_find_fmtdesc( 99 u32 code, 100 const struct soc_mbus_lookup *lookup, 101 int n); 102const struct soc_mbus_pixelfmt *soc_mbus_get_fmtdesc( 103 u32 code); 104s32 soc_mbus_bytes_per_line(u32 width, const struct soc_mbus_pixelfmt *mf); 105s32 soc_mbus_image_size(const struct soc_mbus_pixelfmt *mf, 106 u32 bytes_per_line, u32 height); 107int soc_mbus_samples_per_pixel(const struct soc_mbus_pixelfmt *mf, 108 unsigned int *numerator, unsigned int *denominator); 109unsigned int soc_mbus_config_compatible(const struct v4l2_mbus_config *cfg, 110 unsigned int flags); 111 112#endif 113