include/media/v4l2-mediabus.h

   1 /* SPDX-License-Identifier: GPL-2.0-only */
   2 /*
   3  * Media Bus API header
   4  *
   5  * Copyright (C) 2009, Guennadi Liakhovetski <g.liakhovetski@gmx.de>
   6  */
   7
   8 #ifndef V4L2_MEDIABUS_H
   9 #define V4L2_MEDIABUS_H
  10
  11 #include <linux/v4l2-mediabus.h>
  12 #include <linux/bitops.h>
  13
  14 /*
  15  * How to use the V4L2_MBUS_* flags:
  16  * Flags are defined for each of the possible states and values of a media
  17  * bus configuration parameter. One and only one bit of each group of flags
  18  * shall be set by the users of the v4l2_subdev_pad_ops.get_mbus_config and
  19  * v4l2_subdev_pad_ops.set_mbus_config operations to ensure that no
  20  * conflicting settings are specified when reporting and setting the media bus
  21  * configuration with the two operations respectively. For example, it is
  22  * invalid to set or clear both the V4L2_MBUS_HSYNC_ACTIVE_HIGH and the
  23  * V4L2_MBUS_HSYNC_ACTIVE_LOW flag at the same time. Instead either flag
  24  * V4L2_MBUS_HSYNC_ACTIVE_HIGH or flag V4L2_MBUS_HSYNC_ACTIVE_LOW shall be
  25  * set. The same is true for the V4L2_MBUS_CSI2_1/2/3/4_LANE flags group: only
  26  * one of these four bits shall be set.
  27  *
  28  * TODO: replace the existing V4L2_MBUS_* flags with structures of fields
  29  * to avoid conflicting settings.
  30  *
  31  * In example:
  32  *     #define V4L2_MBUS_HSYNC_ACTIVE_HIGH             BIT(2)
  33  *     #define V4L2_MBUS_HSYNC_ACTIVE_LOW              BIT(3)
  34  * will be replaced by a field whose value reports the intended active state of
  35  * the signal:
  36  *     unsigned int v4l2_mbus_hsync_active : 1;
  37  */
  38
  39 /* Parallel flags */
  40 /*
  41  * The client runs in master or in slave mode. By "Master mode" an operation
  42  * mode is meant, when the client (e.g., a camera sensor) is producing
  43  * horizontal and vertical synchronisation. In "Slave mode" the host is
  44  * providing these signals to the slave.
  45  */
  46 #define V4L2_MBUS_MASTER                        BIT(0)
  47 #define V4L2_MBUS_SLAVE                         BIT(1)
  48 /*
  49  * Signal polarity flags
  50  * Note: in BT.656 mode HSYNC, FIELD, and VSYNC are unused
  51  * V4L2_MBUS_[HV]SYNC* flags should be also used for specifying
  52  * configuration of hardware that uses [HV]REF signals
  53  */
  54 #define V4L2_MBUS_HSYNC_ACTIVE_HIGH             BIT(2)
  55 #define V4L2_MBUS_HSYNC_ACTIVE_LOW              BIT(3)
  56 #define V4L2_MBUS_VSYNC_ACTIVE_HIGH             BIT(4)
  57 #define V4L2_MBUS_VSYNC_ACTIVE_LOW              BIT(5)
  58 #define V4L2_MBUS_PCLK_SAMPLE_RISING            BIT(6)
  59 #define V4L2_MBUS_PCLK_SAMPLE_FALLING           BIT(7)
  60 #define V4L2_MBUS_DATA_ACTIVE_HIGH              BIT(8)
  61 #define V4L2_MBUS_DATA_ACTIVE_LOW               BIT(9)
  62 /* FIELD = 0/1 - Field1 (odd)/Field2 (even) */
  63 #define V4L2_MBUS_FIELD_EVEN_HIGH               BIT(10)
  64 /* FIELD = 1/0 - Field1 (odd)/Field2 (even) */
  65 #define V4L2_MBUS_FIELD_EVEN_LOW                BIT(11)
  66 /* Active state of Sync-on-green (SoG) signal, 0/1 for LOW/HIGH respectively. */
  67 #define V4L2_MBUS_VIDEO_SOG_ACTIVE_HIGH         BIT(12)
  68 #define V4L2_MBUS_VIDEO_SOG_ACTIVE_LOW          BIT(13)
  69 #define V4L2_MBUS_DATA_ENABLE_HIGH              BIT(14)
  70 #define V4L2_MBUS_DATA_ENABLE_LOW               BIT(15)
  71
  72 /* Serial flags */
  73 /* CSI-2 D-PHY number of data lanes. */
  74 #define V4L2_MBUS_CSI2_1_LANE                   BIT(0)
  75 #define V4L2_MBUS_CSI2_2_LANE                   BIT(1)
  76 #define V4L2_MBUS_CSI2_3_LANE                   BIT(2)
  77 #define V4L2_MBUS_CSI2_4_LANE                   BIT(3)
  78 /* CSI-2 Virtual Channel identifiers. */
  79 #define V4L2_MBUS_CSI2_CHANNEL_0                BIT(4)
  80 #define V4L2_MBUS_CSI2_CHANNEL_1                BIT(5)
  81 #define V4L2_MBUS_CSI2_CHANNEL_2                BIT(6)
  82 #define V4L2_MBUS_CSI2_CHANNEL_3                BIT(7)
  83 /* Clock non-continuous mode support. */
  84 #define V4L2_MBUS_CSI2_CONTINUOUS_CLOCK         BIT(8)
  85 #define V4L2_MBUS_CSI2_NONCONTINUOUS_CLOCK      BIT(9)
  86
  87 #define V4L2_MBUS_CSI2_LANES            (V4L2_MBUS_CSI2_1_LANE | \
  88                                          V4L2_MBUS_CSI2_2_LANE | \
  89                                          V4L2_MBUS_CSI2_3_LANE | \
  90                                          V4L2_MBUS_CSI2_4_LANE)
  91 #define V4L2_MBUS_CSI2_CHANNELS         (V4L2_MBUS_CSI2_CHANNEL_0 | \
  92                                          V4L2_MBUS_CSI2_CHANNEL_1 | \
  93                                          V4L2_MBUS_CSI2_CHANNEL_2 | \
  94                                          V4L2_MBUS_CSI2_CHANNEL_3)
  95
  96 /**
  97  * enum v4l2_mbus_type - media bus type
  98  * @V4L2_MBUS_UNKNOWN:  unknown bus type, no V4L2 mediabus configuration
  99  * @V4L2_MBUS_PARALLEL: parallel interface with hsync and vsync
 100  * @V4L2_MBUS_BT656:    parallel interface with embedded synchronisation, can
 101  *                      also be used for BT.1120
 102  * @V4L2_MBUS_CSI1:     MIPI CSI-1 serial interface
 103  * @V4L2_MBUS_CCP2:     CCP2 (Compact Camera Port 2)
 104  * @V4L2_MBUS_CSI2_DPHY: MIPI CSI-2 serial interface, with D-PHY
 105  * @V4L2_MBUS_CSI2_CPHY: MIPI CSI-2 serial interface, with C-PHY
 106  */
 107 enum v4l2_mbus_type {
 108         V4L2_MBUS_UNKNOWN,
 109         V4L2_MBUS_PARALLEL,
 110         V4L2_MBUS_BT656,
 111         V4L2_MBUS_CSI1,
 112         V4L2_MBUS_CCP2,
 113         V4L2_MBUS_CSI2_DPHY,
 114         V4L2_MBUS_CSI2_CPHY,
 115 };
 116
 117 /**
 118  * struct v4l2_mbus_config - media bus configuration
 119  * @type:       in: interface type
 120  * @flags:      in / out: configuration flags, depending on @type
 121  */
 122 struct v4l2_mbus_config {
 123         enum v4l2_mbus_type type;
 124         unsigned int flags;
 125 };
 126
 127 /**
 128  * v4l2_fill_pix_format - Ancillary routine that fills a &struct
 129  *      v4l2_pix_format fields from a &struct v4l2_mbus_framefmt.
 130  *
 131  * @pix_fmt:    pointer to &struct v4l2_pix_format to be filled
 132  * @mbus_fmt:   pointer to &struct v4l2_mbus_framefmt to be used as model
 133  */
 134 static inline void
 135 v4l2_fill_pix_format(struct v4l2_pix_format *pix_fmt,
 136                      const struct v4l2_mbus_framefmt *mbus_fmt)
 137 {
 138         pix_fmt->width = mbus_fmt->width;
 139         pix_fmt->height = mbus_fmt->height;
 140         pix_fmt->field = mbus_fmt->field;
 141         pix_fmt->colorspace = mbus_fmt->colorspace;
 142         pix_fmt->ycbcr_enc = mbus_fmt->ycbcr_enc;
 143         pix_fmt->quantization = mbus_fmt->quantization;
 144         pix_fmt->xfer_func = mbus_fmt->xfer_func;
 145 }
 146
 147 /**
 148  * v4l2_fill_pix_format - Ancillary routine that fills a &struct
 149  *      v4l2_mbus_framefmt from a &struct v4l2_pix_format and a
 150  *      data format code.
 151  *
 152  * @mbus_fmt:   pointer to &struct v4l2_mbus_framefmt to be filled
 153  * @pix_fmt:    pointer to &struct v4l2_pix_format to be used as model
 154  * @code:       data format code (from &enum v4l2_mbus_pixelcode)
 155  */
 156 static inline void v4l2_fill_mbus_format(struct v4l2_mbus_framefmt *mbus_fmt,
 157                                          const struct v4l2_pix_format *pix_fmt,
 158                            u32 code)
 159 {
 160         mbus_fmt->width = pix_fmt->width;
 161         mbus_fmt->height = pix_fmt->height;
 162         mbus_fmt->field = pix_fmt->field;
 163         mbus_fmt->colorspace = pix_fmt->colorspace;
 164         mbus_fmt->ycbcr_enc = pix_fmt->ycbcr_enc;
 165         mbus_fmt->quantization = pix_fmt->quantization;
 166         mbus_fmt->xfer_func = pix_fmt->xfer_func;
 167         mbus_fmt->code = code;
 168 }
 169
 170 /**
 171  * v4l2_fill_pix_format - Ancillary routine that fills a &struct
 172  *      v4l2_pix_format_mplane fields from a media bus structure.
 173  *
 174  * @pix_mp_fmt: pointer to &struct v4l2_pix_format_mplane to be filled
 175  * @mbus_fmt:   pointer to &struct v4l2_mbus_framefmt to be used as model
 176  */
 177 static inline void
 178 v4l2_fill_pix_format_mplane(struct v4l2_pix_format_mplane *pix_mp_fmt,
 179                             const struct v4l2_mbus_framefmt *mbus_fmt)
 180 {
 181         pix_mp_fmt->width = mbus_fmt->width;
 182         pix_mp_fmt->height = mbus_fmt->height;
 183         pix_mp_fmt->field = mbus_fmt->field;
 184         pix_mp_fmt->colorspace = mbus_fmt->colorspace;
 185         pix_mp_fmt->ycbcr_enc = mbus_fmt->ycbcr_enc;
 186         pix_mp_fmt->quantization = mbus_fmt->quantization;
 187         pix_mp_fmt->xfer_func = mbus_fmt->xfer_func;
 188 }
 189
 190 /**
 191  * v4l2_fill_pix_format - Ancillary routine that fills a &struct
 192  *      v4l2_mbus_framefmt from a &struct v4l2_pix_format_mplane.
 193  *
 194  * @mbus_fmt:   pointer to &struct v4l2_mbus_framefmt to be filled
 195  * @pix_mp_fmt: pointer to &struct v4l2_pix_format_mplane to be used as model
 196  */
 197 static inline void
 198 v4l2_fill_mbus_format_mplane(struct v4l2_mbus_framefmt *mbus_fmt,
 199                              const struct v4l2_pix_format_mplane *pix_mp_fmt)
 200 {
 201         mbus_fmt->width = pix_mp_fmt->width;
 202         mbus_fmt->height = pix_mp_fmt->height;
 203         mbus_fmt->field = pix_mp_fmt->field;
 204         mbus_fmt->colorspace = pix_mp_fmt->colorspace;
 205         mbus_fmt->ycbcr_enc = pix_mp_fmt->ycbcr_enc;
 206         mbus_fmt->quantization = pix_mp_fmt->quantization;
 207         mbus_fmt->xfer_func = pix_mp_fmt->xfer_func;
 208 }
 209
 210 #endif