2019-06-04 02:11:33 -06:00
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/* SPDX-License-Identifier: GPL-2.0-only */
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V4L/DVB (13658): v4l: add a media-bus API for configuring v4l2 subdev pixel and frame formats
Video subdevices, like cameras, decoders, connect to video bridges over
specialised busses. Data is being transferred over these busses in various
formats, which only loosely correspond to fourcc codes, describing how video
data is stored in RAM. This is not a one-to-one correspondence, therefore we
cannot use fourcc codes to configure subdevice output data formats. This patch
adds codes for several such on-the-bus formats and an API, similar to the
familiar .s_fmt(), .g_fmt(), .try_fmt(), .enum_fmt() API for configuring those
codes. After all users of the old API in struct v4l2_subdev_video_ops are
converted, it will be removed. Also add helper routines to support generic
pass-through mode for the soc-camera framework.
create mode 100644 drivers/media/video/soc_mediabus.c
create mode 100644 include/media/soc_mediabus.h
create mode 100644 include/media/v4l2-mediabus.h
Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de>
Acked-by: Hans Verkuil <hverkuil@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
2009-12-11 07:41:28 -07:00
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/*
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* Media Bus API header
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*
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* Copyright (C) 2009, Guennadi Liakhovetski <g.liakhovetski@gmx.de>
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*/
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#ifndef V4L2_MEDIABUS_H
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#define V4L2_MEDIABUS_H
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2010-03-15 16:33:31 -06:00
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#include <linux/v4l2-mediabus.h>
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2017-09-28 07:51:42 -06:00
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#include <linux/bitops.h>
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2011-07-01 11:31:17 -06:00
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/* Parallel flags */
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/*
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* Can the client run in master or in slave mode. By "Master mode" an operation
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* mode is meant, when the client (e.g., a camera sensor) is producing
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* horizontal and vertical synchronisation. In "Slave mode" the host is
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* providing these signals to the slave.
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*/
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2017-09-28 07:51:42 -06:00
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#define V4L2_MBUS_MASTER BIT(0)
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#define V4L2_MBUS_SLAVE BIT(1)
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2011-09-19 09:58:54 -06:00
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/*
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* Signal polarity flags
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* Note: in BT.656 mode HSYNC, FIELD, and VSYNC are unused
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* V4L2_MBUS_[HV]SYNC* flags should be also used for specifying
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* configuration of hardware that uses [HV]REF signals
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*/
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2017-09-28 07:51:42 -06:00
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#define V4L2_MBUS_HSYNC_ACTIVE_HIGH BIT(2)
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#define V4L2_MBUS_HSYNC_ACTIVE_LOW BIT(3)
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#define V4L2_MBUS_VSYNC_ACTIVE_HIGH BIT(4)
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#define V4L2_MBUS_VSYNC_ACTIVE_LOW BIT(5)
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#define V4L2_MBUS_PCLK_SAMPLE_RISING BIT(6)
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#define V4L2_MBUS_PCLK_SAMPLE_FALLING BIT(7)
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#define V4L2_MBUS_DATA_ACTIVE_HIGH BIT(8)
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#define V4L2_MBUS_DATA_ACTIVE_LOW BIT(9)
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2011-09-19 09:58:54 -06:00
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/* FIELD = 0/1 - Field1 (odd)/Field2 (even) */
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2017-09-28 07:51:42 -06:00
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#define V4L2_MBUS_FIELD_EVEN_HIGH BIT(10)
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2011-09-19 09:58:54 -06:00
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/* FIELD = 1/0 - Field1 (odd)/Field2 (even) */
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2017-09-28 07:51:42 -06:00
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#define V4L2_MBUS_FIELD_EVEN_LOW BIT(11)
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2013-08-10 23:02:24 -06:00
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/* Active state of Sync-on-green (SoG) signal, 0/1 for LOW/HIGH respectively. */
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2017-09-28 07:51:42 -06:00
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#define V4L2_MBUS_VIDEO_SOG_ACTIVE_HIGH BIT(12)
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#define V4L2_MBUS_VIDEO_SOG_ACTIVE_LOW BIT(13)
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2018-07-09 08:19:19 -06:00
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#define V4L2_MBUS_DATA_ENABLE_HIGH BIT(14)
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#define V4L2_MBUS_DATA_ENABLE_LOW BIT(15)
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2011-07-01 11:31:17 -06:00
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/* Serial flags */
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/* How many lanes the client can use */
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#define V4L2_MBUS_CSI2_1_LANE BIT(0)
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#define V4L2_MBUS_CSI2_2_LANE BIT(1)
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#define V4L2_MBUS_CSI2_3_LANE BIT(2)
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#define V4L2_MBUS_CSI2_4_LANE BIT(3)
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2011-07-01 11:31:17 -06:00
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/* On which channels it can send video data */
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2017-09-28 07:51:42 -06:00
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#define V4L2_MBUS_CSI2_CHANNEL_0 BIT(4)
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#define V4L2_MBUS_CSI2_CHANNEL_1 BIT(5)
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#define V4L2_MBUS_CSI2_CHANNEL_2 BIT(6)
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#define V4L2_MBUS_CSI2_CHANNEL_3 BIT(7)
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2011-07-01 11:31:17 -06:00
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/* Does it support only continuous or also non-continuous clock mode */
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2017-09-28 07:51:42 -06:00
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#define V4L2_MBUS_CSI2_CONTINUOUS_CLOCK BIT(8)
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#define V4L2_MBUS_CSI2_NONCONTINUOUS_CLOCK BIT(9)
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2011-07-01 11:31:17 -06:00
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2018-10-04 15:10:46 -06:00
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#define V4L2_MBUS_CSI2_LANES (V4L2_MBUS_CSI2_1_LANE | \
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V4L2_MBUS_CSI2_2_LANE | \
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V4L2_MBUS_CSI2_3_LANE | \
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V4L2_MBUS_CSI2_4_LANE)
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#define V4L2_MBUS_CSI2_CHANNELS (V4L2_MBUS_CSI2_CHANNEL_0 | \
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V4L2_MBUS_CSI2_CHANNEL_1 | \
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V4L2_MBUS_CSI2_CHANNEL_2 | \
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V4L2_MBUS_CSI2_CHANNEL_3)
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2011-07-01 11:31:17 -06:00
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/**
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2015-08-22 06:04:46 -06:00
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* enum v4l2_mbus_type - media bus type
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2018-07-31 04:43:14 -06:00
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* @V4L2_MBUS_UNKNOWN: unknown bus type, no V4L2 mediabus configuration
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2011-07-01 11:31:17 -06:00
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* @V4L2_MBUS_PARALLEL: parallel interface with hsync and vsync
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* @V4L2_MBUS_BT656: parallel interface with embedded synchronisation, can
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* also be used for BT.1120
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2015-02-25 12:39:11 -07:00
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* @V4L2_MBUS_CSI1: MIPI CSI-1 serial interface
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* @V4L2_MBUS_CCP2: CCP2 (Compact Camera Port 2)
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2018-07-03 15:19:27 -06:00
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* @V4L2_MBUS_CSI2_DPHY: MIPI CSI-2 serial interface, with D-PHY
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* @V4L2_MBUS_CSI2_CPHY: MIPI CSI-2 serial interface, with C-PHY
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2011-07-01 11:31:17 -06:00
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*/
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enum v4l2_mbus_type {
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V4L2_MBUS_UNKNOWN,
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2011-07-01 11:31:17 -06:00
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V4L2_MBUS_PARALLEL,
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V4L2_MBUS_BT656,
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2015-02-25 12:39:11 -07:00
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V4L2_MBUS_CSI1,
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V4L2_MBUS_CCP2,
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2018-07-03 15:19:27 -06:00
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V4L2_MBUS_CSI2_DPHY,
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V4L2_MBUS_CSI2_CPHY,
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2011-07-01 11:31:17 -06:00
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};
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/**
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2015-08-22 06:04:46 -06:00
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* struct v4l2_mbus_config - media bus configuration
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2011-07-01 11:31:17 -06:00
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* @type: in: interface type
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* @flags: in / out: configuration flags, depending on @type
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*/
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struct v4l2_mbus_config {
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enum v4l2_mbus_type type;
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unsigned int flags;
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};
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2017-09-28 16:39:32 -06:00
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/**
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* v4l2_fill_pix_format - Ancillary routine that fills a &struct
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* v4l2_pix_format fields from a &struct v4l2_mbus_framefmt.
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*
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* @pix_fmt: pointer to &struct v4l2_pix_format to be filled
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* @mbus_fmt: pointer to &struct v4l2_mbus_framefmt to be used as model
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*/
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2018-10-04 15:10:46 -06:00
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static inline void
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v4l2_fill_pix_format(struct v4l2_pix_format *pix_fmt,
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const struct v4l2_mbus_framefmt *mbus_fmt)
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2010-05-08 14:08:58 -06:00
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{
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pix_fmt->width = mbus_fmt->width;
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pix_fmt->height = mbus_fmt->height;
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pix_fmt->field = mbus_fmt->field;
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pix_fmt->colorspace = mbus_fmt->colorspace;
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2014-11-17 05:10:33 -07:00
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pix_fmt->ycbcr_enc = mbus_fmt->ycbcr_enc;
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pix_fmt->quantization = mbus_fmt->quantization;
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2015-04-28 05:49:09 -06:00
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pix_fmt->xfer_func = mbus_fmt->xfer_func;
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2010-05-08 14:08:58 -06:00
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}
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2017-09-28 16:39:32 -06:00
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/**
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* v4l2_fill_pix_format - Ancillary routine that fills a &struct
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* v4l2_mbus_framefmt from a &struct v4l2_pix_format and a
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* data format code.
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*
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* @mbus_fmt: pointer to &struct v4l2_mbus_framefmt to be filled
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* @pix_fmt: pointer to &struct v4l2_pix_format to be used as model
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* @code: data format code (from &enum v4l2_mbus_pixelcode)
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*/
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2010-05-08 14:08:58 -06:00
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static inline void v4l2_fill_mbus_format(struct v4l2_mbus_framefmt *mbus_fmt,
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const struct v4l2_pix_format *pix_fmt,
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2014-11-10 10:28:28 -07:00
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u32 code)
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2010-05-08 14:08:58 -06:00
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{
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mbus_fmt->width = pix_fmt->width;
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mbus_fmt->height = pix_fmt->height;
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mbus_fmt->field = pix_fmt->field;
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mbus_fmt->colorspace = pix_fmt->colorspace;
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2014-11-17 05:10:33 -07:00
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mbus_fmt->ycbcr_enc = pix_fmt->ycbcr_enc;
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mbus_fmt->quantization = pix_fmt->quantization;
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2015-04-28 05:49:09 -06:00
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mbus_fmt->xfer_func = pix_fmt->xfer_func;
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2010-05-08 14:08:58 -06:00
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mbus_fmt->code = code;
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}
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2017-09-28 16:39:32 -06:00
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/**
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* v4l2_fill_pix_format - Ancillary routine that fills a &struct
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* v4l2_pix_format_mplane fields from a media bus structure.
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*
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* @pix_mp_fmt: pointer to &struct v4l2_pix_format_mplane to be filled
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* @mbus_fmt: pointer to &struct v4l2_mbus_framefmt to be used as model
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*/
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2018-10-04 15:10:46 -06:00
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static inline void
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v4l2_fill_pix_format_mplane(struct v4l2_pix_format_mplane *pix_mp_fmt,
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const struct v4l2_mbus_framefmt *mbus_fmt)
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2017-07-07 02:48:47 -06:00
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{
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pix_mp_fmt->width = mbus_fmt->width;
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pix_mp_fmt->height = mbus_fmt->height;
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pix_mp_fmt->field = mbus_fmt->field;
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pix_mp_fmt->colorspace = mbus_fmt->colorspace;
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pix_mp_fmt->ycbcr_enc = mbus_fmt->ycbcr_enc;
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pix_mp_fmt->quantization = mbus_fmt->quantization;
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pix_mp_fmt->xfer_func = mbus_fmt->xfer_func;
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}
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2017-09-28 16:39:32 -06:00
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/**
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* v4l2_fill_pix_format - Ancillary routine that fills a &struct
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* v4l2_mbus_framefmt from a &struct v4l2_pix_format_mplane.
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*
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* @mbus_fmt: pointer to &struct v4l2_mbus_framefmt to be filled
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* @pix_mp_fmt: pointer to &struct v4l2_pix_format_mplane to be used as model
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*/
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2018-10-04 15:10:46 -06:00
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static inline void
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v4l2_fill_mbus_format_mplane(struct v4l2_mbus_framefmt *mbus_fmt,
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const struct v4l2_pix_format_mplane *pix_mp_fmt)
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2017-07-07 02:48:47 -06:00
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{
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mbus_fmt->width = pix_mp_fmt->width;
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mbus_fmt->height = pix_mp_fmt->height;
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mbus_fmt->field = pix_mp_fmt->field;
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mbus_fmt->colorspace = pix_mp_fmt->colorspace;
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mbus_fmt->ycbcr_enc = pix_mp_fmt->ycbcr_enc;
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mbus_fmt->quantization = pix_mp_fmt->quantization;
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mbus_fmt->xfer_func = pix_mp_fmt->xfer_func;
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}
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V4L/DVB (13658): v4l: add a media-bus API for configuring v4l2 subdev pixel and frame formats
Video subdevices, like cameras, decoders, connect to video bridges over
specialised busses. Data is being transferred over these busses in various
formats, which only loosely correspond to fourcc codes, describing how video
data is stored in RAM. This is not a one-to-one correspondence, therefore we
cannot use fourcc codes to configure subdevice output data formats. This patch
adds codes for several such on-the-bus formats and an API, similar to the
familiar .s_fmt(), .g_fmt(), .try_fmt(), .enum_fmt() API for configuring those
codes. After all users of the old API in struct v4l2_subdev_video_ops are
converted, it will be removed. Also add helper routines to support generic
pass-through mode for the soc-camera framework.
create mode 100644 drivers/media/video/soc_mediabus.c
create mode 100644 include/media/soc_mediabus.h
create mode 100644 include/media/v4l2-mediabus.h
Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de>
Acked-by: Hans Verkuil <hverkuil@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
2009-12-11 07:41:28 -07:00
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#endif
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