v4l2-mediabus.h

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/*
 * Media Bus API header
 *
 * Copyright (C) 2009, Guennadi Liakhovetski <[email protected]>
 *
 * 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 V4L2_MEDIABUS_H
#define V4L2_MEDIABUS_H

#include <linux/v4l2-mediabus.h>

/* Parallel flags */
/*
 * Can the client run in master or in slave mode. By "Master mode" an operation
 * mode is meant, when the client (e.g., a camera sensor) is producing
 * horizontal and vertical synchronisation. In "Slave mode" the host is
 * providing these signals to the slave.
 */
#define V4L2_MBUS_MASTER            (1 << 0)
#define V4L2_MBUS_SLAVE             (1 << 1)
/*
 * Signal polarity flags
 * Note: in BT.656 mode HSYNC, FIELD, and VSYNC are unused
 * V4L2_MBUS_[HV]SYNC* flags should be also used for specifying
 * configuration of hardware that uses [HV]REF signals
 */
#define V4L2_MBUS_HSYNC_ACTIVE_HIGH     (1 << 2)
#define V4L2_MBUS_HSYNC_ACTIVE_LOW      (1 << 3)
#define V4L2_MBUS_VSYNC_ACTIVE_HIGH     (1 << 4)
#define V4L2_MBUS_VSYNC_ACTIVE_LOW      (1 << 5)
#define V4L2_MBUS_PCLK_SAMPLE_RISING        (1 << 6)
#define V4L2_MBUS_PCLK_SAMPLE_FALLING       (1 << 7)
#define V4L2_MBUS_DATA_ACTIVE_HIGH      (1 << 8)
#define V4L2_MBUS_DATA_ACTIVE_LOW       (1 << 9)
/* FIELD = 0/1 - Field1 (odd)/Field2 (even) */
#define V4L2_MBUS_FIELD_EVEN_HIGH       (1 << 10)
/* FIELD = 1/0 - Field1 (odd)/Field2 (even) */
#define V4L2_MBUS_FIELD_EVEN_LOW        (1 << 11)

/* Serial flags */
/* How many lanes the client can use */
#define V4L2_MBUS_CSI2_1_LANE           (1 << 0)
#define V4L2_MBUS_CSI2_2_LANE           (1 << 1)
#define V4L2_MBUS_CSI2_3_LANE           (1 << 2)
#define V4L2_MBUS_CSI2_4_LANE           (1 << 3)
/* On which channels it can send video data */
#define V4L2_MBUS_CSI2_CHANNEL_0        (1 << 4)
#define V4L2_MBUS_CSI2_CHANNEL_1        (1 << 5)
#define V4L2_MBUS_CSI2_CHANNEL_2        (1 << 6)
#define V4L2_MBUS_CSI2_CHANNEL_3        (1 << 7)
/* Does it support only continuous or also non-continuous clock mode */
#define V4L2_MBUS_CSI2_CONTINUOUS_CLOCK     (1 << 8)
#define V4L2_MBUS_CSI2_NONCONTINUOUS_CLOCK  (1 << 9)

#define V4L2_MBUS_CSI2_LANES        (V4L2_MBUS_CSI2_1_LANE | V4L2_MBUS_CSI2_2_LANE | \
                     V4L2_MBUS_CSI2_3_LANE | V4L2_MBUS_CSI2_4_LANE)
#define V4L2_MBUS_CSI2_CHANNELS     (V4L2_MBUS_CSI2_CHANNEL_0 | V4L2_MBUS_CSI2_CHANNEL_1 | \
                     V4L2_MBUS_CSI2_CHANNEL_2 | V4L2_MBUS_CSI2_CHANNEL_3)

enum v4l2_mbus_type {
    V4L2_MBUS_PARALLEL,
    V4L2_MBUS_BT656,
    V4L2_MBUS_CSI2,
};

struct v4l2_mbus_config {
    enum v4l2_mbus_type type;
    unsigned int flags;
};

static inline void v4l2_fill_pix_format(struct v4l2_pix_format *pix_fmt,
                const struct v4l2_mbus_framefmt *mbus_fmt)
{
    pix_fmt->width = mbus_fmt->width;
    pix_fmt->height = mbus_fmt->height;
    pix_fmt->field = mbus_fmt->field;
    pix_fmt->colorspace = mbus_fmt->colorspace;
}

static inline void v4l2_fill_mbus_format(struct v4l2_mbus_framefmt *mbus_fmt,
               const struct v4l2_pix_format *pix_fmt,
               enum v4l2_mbus_pixelcode code)
{
    mbus_fmt->width = pix_fmt->width;
    mbus_fmt->height = pix_fmt->height;
    mbus_fmt->field = pix_fmt->field;
    mbus_fmt->colorspace = pix_fmt->colorspace;
    mbus_fmt->code = code;
}

#endif