include/media/v4l2-mediabus.h

   1 /*
   2  * Media Bus API header
   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 V4L2_MEDIABUS_H
  12 #define V4L2_MEDIABUS_H
  13
  14 #include <linux/v4l2-mediabus.h>
  15
  16 /* Parallel flags */
  17 /*
  18  * Can the client run in master or in slave mode. By "Master mode" an operation
  19  * mode is meant, when the client (e.g., a camera sensor) is producing
  20  * horizontal and vertical synchronisation. In "Slave mode" the host is
  21  * providing these signals to the slave.
  22  */
  23 #define V4L2_MBUS_MASTER                        (1 << 0)
  24 #define V4L2_MBUS_SLAVE                         (1 << 1)
  25 /*
  26  * Signal polarity flags
  27  * Note: in BT.656 mode HSYNC, FIELD, and VSYNC are unused
  28  * V4L2_MBUS_[HV]SYNC* flags should be also used for specifying
  29  * configuration of hardware that uses [HV]REF signals
  30  */
  31 #define V4L2_MBUS_HSYNC_ACTIVE_HIGH             (1 << 2)
  32 #define V4L2_MBUS_HSYNC_ACTIVE_LOW              (1 << 3)
  33 #define V4L2_MBUS_VSYNC_ACTIVE_HIGH             (1 << 4)
  34 #define V4L2_MBUS_VSYNC_ACTIVE_LOW              (1 << 5)
  35 #define V4L2_MBUS_PCLK_SAMPLE_RISING            (1 << 6)
  36 #define V4L2_MBUS_PCLK_SAMPLE_FALLING           (1 << 7)
  37 #define V4L2_MBUS_DATA_ACTIVE_HIGH              (1 << 8)
  38 #define V4L2_MBUS_DATA_ACTIVE_LOW               (1 << 9)
  39 /* FIELD = 0/1 - Field1 (odd)/Field2 (even) */
  40 #define V4L2_MBUS_FIELD_EVEN_HIGH               (1 << 10)
  41 /* FIELD = 1/0 - Field1 (odd)/Field2 (even) */
  42 #define V4L2_MBUS_FIELD_EVEN_LOW                (1 << 11)
  43 /* Active state of Sync-on-green (SoG) signal, 0/1 for LOW/HIGH respectively. */
  44 #define V4L2_MBUS_VIDEO_SOG_ACTIVE_HIGH (1 << 12)
  45 #define V4L2_MBUS_VIDEO_SOG_ACTIVE_LOW          (1 << 13)
  46
  47 /* Serial flags */
  48 /* How many lanes the client can use */
  49 #define V4L2_MBUS_CSI2_1_LANE                   (1 << 0)
  50 #define V4L2_MBUS_CSI2_2_LANE                   (1 << 1)
  51 #define V4L2_MBUS_CSI2_3_LANE                   (1 << 2)
  52 #define V4L2_MBUS_CSI2_4_LANE                   (1 << 3)
  53 /* On which channels it can send video data */
  54 #define V4L2_MBUS_CSI2_CHANNEL_0                (1 << 4)
  55 #define V4L2_MBUS_CSI2_CHANNEL_1                (1 << 5)
  56 #define V4L2_MBUS_CSI2_CHANNEL_2                (1 << 6)
  57 #define V4L2_MBUS_CSI2_CHANNEL_3                (1 << 7)
  58 /* Does it support only continuous or also non-continuous clock mode */
  59 #define V4L2_MBUS_CSI2_CONTINUOUS_CLOCK         (1 << 8)
  60 #define V4L2_MBUS_CSI2_NONCONTINUOUS_CLOCK      (1 << 9)
  61
  62 #define V4L2_MBUS_CSI2_LANES            (V4L2_MBUS_CSI2_1_LANE | V4L2_MBUS_CSI2_2_LANE | \
  63                                          V4L2_MBUS_CSI2_3_LANE | V4L2_MBUS_CSI2_4_LANE)
  64 #define V4L2_MBUS_CSI2_CHANNELS         (V4L2_MBUS_CSI2_CHANNEL_0 | V4L2_MBUS_CSI2_CHANNEL_1 | \
  65                                          V4L2_MBUS_CSI2_CHANNEL_2 | V4L2_MBUS_CSI2_CHANNEL_3)
  66
  67 /**
  68  * v4l2_mbus_type - media bus type
  69  * @V4L2_MBUS_PARALLEL: parallel interface with hsync and vsync
  70  * @V4L2_MBUS_BT656:    parallel interface with embedded synchronisation, can
  71  *                      also be used for BT.1120
  72  * @V4L2_MBUS_CSI2:     MIPI CSI-2 serial interface
  73  */
  74 enum v4l2_mbus_type {
  75         V4L2_MBUS_PARALLEL,
  76         V4L2_MBUS_BT656,
  77         V4L2_MBUS_CSI2,
  78 };
  79
  80 /**
  81  * v4l2_mbus_config - media bus configuration
  82  * @type:       in: interface type
  83  * @flags:      in / out: configuration flags, depending on @type
  84  */
  85 struct v4l2_mbus_config {
  86         enum v4l2_mbus_type type;
  87         unsigned int flags;
  88 };
  89
  90 static inline void v4l2_fill_pix_format(struct v4l2_pix_format *pix_fmt,
  91                                 const struct v4l2_mbus_framefmt *mbus_fmt)
  92 {
  93         pix_fmt->width = mbus_fmt->width;
  94         pix_fmt->height = mbus_fmt->height;
  95         pix_fmt->field = mbus_fmt->field;
  96         pix_fmt->colorspace = mbus_fmt->colorspace;
  97 }
  98
  99 static inline void v4l2_fill_mbus_format(struct v4l2_mbus_framefmt *mbus_fmt,
 100                            const struct v4l2_pix_format *pix_fmt,
 101                            enum v4l2_mbus_pixelcode code)
 102 {
 103         mbus_fmt->width = pix_fmt->width;
 104         mbus_fmt->height = pix_fmt->height;
 105         mbus_fmt->field = pix_fmt->field;
 106         mbus_fmt->colorspace = pix_fmt->colorspace;
 107         mbus_fmt->code = code;
 108 }
 109
 110 #endif