linux/include/media/v4l2-mediabus.h
Sylwester Nawrocki 3c6938f805 [media] v4l2: Add polarity flag definitions for the parallel bus FIELD signal
FIELD signal is used for indicating frame field type to the frame grabber
in interlaced scan mode, as specified in ITU-R BT.601 standard.
In normal operation mode FIELD = 0 selects Field1 (odd) and FIELD = 1
selects Field2 (even). When the FIELD signal is inverted it's the other
way around.

Add corresponding flags for configuring the FIELD signal polarity,
V4L2_MBUS_FIELD_EVEN_HIGH for the standard (non-inverted) case and
V4L2_MBUS_FIELD_EVEN_LOW for inverted case.

Also add a comment about usage of V4L2_MBUS_[HV]SYNC* flags for
the hardware that uses [HV]REF signals.

Signed-off-by: Sylwester Nawrocki <s.nawrocki@samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
Acked-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
2011-09-24 00:21:31 -03:00

107 lines
3.5 KiB
C

/*
* Media Bus API header
*
* Copyright (C) 2009, Guennadi Liakhovetski <g.liakhovetski@gmx.de>
*
* 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)
/**
* v4l2_mbus_type - media bus type
* @V4L2_MBUS_PARALLEL: parallel interface with hsync and vsync
* @V4L2_MBUS_BT656: parallel interface with embedded synchronisation, can
* also be used for BT.1120
* @V4L2_MBUS_CSI2: MIPI CSI-2 serial interface
*/
enum v4l2_mbus_type {
V4L2_MBUS_PARALLEL,
V4L2_MBUS_BT656,
V4L2_MBUS_CSI2,
};
/**
* v4l2_mbus_config - media bus configuration
* @type: in: interface type
* @flags: in / out: configuration flags, depending on @type
*/
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