253 lines
8.7 KiB
C
253 lines
8.7 KiB
C
/* SPDX-License-Identifier: GPL-2.0-only */
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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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#include <linux/v4l2-mediabus.h>
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#include <linux/bitops.h>
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/*
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* How to use the V4L2_MBUS_* flags:
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* Flags are defined for each of the possible states and values of a media
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* bus configuration parameter. One and only one bit of each group of flags
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* shall be set by the users of the v4l2_subdev_pad_ops.get_mbus_config
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* operation to ensure that no conflicting settings are specified when
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* reporting the media bus configuration. For example, it is invalid to set or
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* clear both the V4L2_MBUS_HSYNC_ACTIVE_HIGH and the
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* V4L2_MBUS_HSYNC_ACTIVE_LOW flag at the same time. Instead either flag
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* V4L2_MBUS_HSYNC_ACTIVE_HIGH or flag V4L2_MBUS_HSYNC_ACTIVE_LOW shall be set.
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*
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* TODO: replace the existing V4L2_MBUS_* flags with structures of fields
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* to avoid conflicting settings.
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*
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* In example:
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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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* will be replaced by a field whose value reports the intended active state of
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* the signal:
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* unsigned int v4l2_mbus_hsync_active : 1;
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*/
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/* Parallel flags */
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/*
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* The client runs 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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#define V4L2_MBUS_MASTER BIT(0)
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#define V4L2_MBUS_SLAVE BIT(1)
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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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#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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/* FIELD = 0/1 - Field1 (odd)/Field2 (even) */
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#define V4L2_MBUS_FIELD_EVEN_HIGH BIT(10)
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/* FIELD = 1/0 - Field1 (odd)/Field2 (even) */
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#define V4L2_MBUS_FIELD_EVEN_LOW BIT(11)
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/* Active state of Sync-on-green (SoG) signal, 0/1 for LOW/HIGH respectively. */
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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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#define V4L2_MBUS_DATA_ENABLE_HIGH BIT(14)
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#define V4L2_MBUS_DATA_ENABLE_LOW BIT(15)
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/* Serial flags */
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/* Clock non-continuous mode support. */
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#define V4L2_MBUS_CSI2_NONCONTINUOUS_CLOCK BIT(0)
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#define V4L2_MBUS_CSI2_MAX_DATA_LANES 8
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/**
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* struct v4l2_mbus_config_mipi_csi2 - MIPI CSI-2 data bus configuration
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* @flags: media bus (V4L2_MBUS_*) flags
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* @data_lanes: an array of physical data lane indexes
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* @clock_lane: physical lane index of the clock lane
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* @num_data_lanes: number of data lanes
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* @lane_polarities: polarity of the lanes. The order is the same of
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* the physical lanes.
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*/
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struct v4l2_mbus_config_mipi_csi2 {
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unsigned int flags;
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unsigned char data_lanes[V4L2_MBUS_CSI2_MAX_DATA_LANES];
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unsigned char clock_lane;
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unsigned char num_data_lanes;
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bool lane_polarities[1 + V4L2_MBUS_CSI2_MAX_DATA_LANES];
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};
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/**
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* struct v4l2_mbus_config_parallel - parallel data bus configuration
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* @flags: media bus (V4L2_MBUS_*) flags
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* @bus_width: bus width in bits
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* @data_shift: data shift in bits
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*/
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struct v4l2_mbus_config_parallel {
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unsigned int flags;
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unsigned char bus_width;
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unsigned char data_shift;
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};
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/**
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* struct v4l2_mbus_config_mipi_csi1 - CSI-1/CCP2 data bus configuration
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* @clock_inv: polarity of clock/strobe signal
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* false - not inverted, true - inverted
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* @strobe: false - data/clock, true - data/strobe
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* @lane_polarity: the polarities of the clock (index 0) and data lanes
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* index (1)
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* @data_lane: the number of the data lane
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* @clock_lane: the number of the clock lane
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*/
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struct v4l2_mbus_config_mipi_csi1 {
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unsigned char clock_inv:1;
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unsigned char strobe:1;
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bool lane_polarity[2];
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unsigned char data_lane;
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unsigned char clock_lane;
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};
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/**
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* enum v4l2_mbus_type - media bus type
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* @V4L2_MBUS_UNKNOWN: unknown bus type, no V4L2 mediabus configuration
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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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* @V4L2_MBUS_CSI1: MIPI CSI-1 serial interface
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* @V4L2_MBUS_CCP2: CCP2 (Compact Camera Port 2)
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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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* @V4L2_MBUS_INVALID: invalid bus type (keep as last)
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*/
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enum v4l2_mbus_type {
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V4L2_MBUS_UNKNOWN,
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V4L2_MBUS_PARALLEL,
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V4L2_MBUS_BT656,
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V4L2_MBUS_CSI1,
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V4L2_MBUS_CCP2,
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V4L2_MBUS_CSI2_DPHY,
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V4L2_MBUS_CSI2_CPHY,
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V4L2_MBUS_INVALID,
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};
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/**
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* struct v4l2_mbus_config - media bus configuration
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* @type: interface type
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* @bus: bus configuration data structure
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* @bus.parallel: embedded &struct v4l2_mbus_config_parallel.
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* Used if the bus is parallel or BT.656.
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* @bus.mipi_csi1: embedded &struct v4l2_mbus_config_mipi_csi1.
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* Used if the bus is MIPI Alliance's Camera Serial
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* Interface version 1 (MIPI CSI1) or Standard
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* Mobile Imaging Architecture's Compact Camera Port 2
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* (SMIA CCP2).
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* @bus.mipi_csi2: embedded &struct v4l2_mbus_config_mipi_csi2.
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* Used if the bus is MIPI Alliance's Camera Serial
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* Interface version 2 (MIPI CSI2).
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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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union {
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struct v4l2_mbus_config_parallel parallel;
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struct v4l2_mbus_config_mipi_csi1 mipi_csi1;
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struct v4l2_mbus_config_mipi_csi2 mipi_csi2;
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} bus;
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};
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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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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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{
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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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pix_fmt->ycbcr_enc = mbus_fmt->ycbcr_enc;
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pix_fmt->quantization = mbus_fmt->quantization;
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pix_fmt->xfer_func = mbus_fmt->xfer_func;
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}
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/**
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* v4l2_fill_mbus_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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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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u32 code)
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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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mbus_fmt->ycbcr_enc = pix_fmt->ycbcr_enc;
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mbus_fmt->quantization = pix_fmt->quantization;
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mbus_fmt->xfer_func = pix_fmt->xfer_func;
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mbus_fmt->code = code;
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}
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/**
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* v4l2_fill_pix_format_mplane - 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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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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{
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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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/**
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* v4l2_fill_mbus_format_mplane - 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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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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{
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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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#endif
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