/* SPDX-License-Identifier: GPL-2.0-only */ /* * Media Bus API header * * Copyright (C) 2009, Guennadi Liakhovetski <[email protected]> */ #ifndef V4L2_MEDIABUS_H #define V4L2_MEDIABUS_H #include <linux/v4l2-mediabus.h> #include <linux/bitops.h> /* * How to use the V4L2_MBUS_* flags: * Flags are defined for each of the possible states and values of a media * bus configuration parameter. One and only one bit of each group of flags * shall be set by the users of the v4l2_subdev_pad_ops.get_mbus_config * operation to ensure that no conflicting settings are specified when * reporting the media bus configuration. For example, it is invalid to set or * clear both the V4L2_MBUS_HSYNC_ACTIVE_HIGH and the * V4L2_MBUS_HSYNC_ACTIVE_LOW flag at the same time. Instead either flag * V4L2_MBUS_HSYNC_ACTIVE_HIGH or flag V4L2_MBUS_HSYNC_ACTIVE_LOW shall be set. * * TODO: replace the existing V4L2_MBUS_* flags with structures of fields * to avoid conflicting settings. * * In example: * #define V4L2_MBUS_HSYNC_ACTIVE_HIGH BIT(2) * #define V4L2_MBUS_HSYNC_ACTIVE_LOW BIT(3) * will be replaced by a field whose value reports the intended active state of * the signal: * unsigned int v4l2_mbus_hsync_active : 1; */ /* Parallel flags */ /* * The client runs 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 … #define V4L2_MBUS_SLAVE … /* * 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 … #define V4L2_MBUS_HSYNC_ACTIVE_LOW … #define V4L2_MBUS_VSYNC_ACTIVE_HIGH … #define V4L2_MBUS_VSYNC_ACTIVE_LOW … #define V4L2_MBUS_PCLK_SAMPLE_RISING … #define V4L2_MBUS_PCLK_SAMPLE_FALLING … #define V4L2_MBUS_PCLK_SAMPLE_DUALEDGE … #define V4L2_MBUS_DATA_ACTIVE_HIGH … #define V4L2_MBUS_DATA_ACTIVE_LOW … /* FIELD = 0/1 - Field1 (odd)/Field2 (even) */ #define V4L2_MBUS_FIELD_EVEN_HIGH … /* FIELD = 1/0 - Field1 (odd)/Field2 (even) */ #define V4L2_MBUS_FIELD_EVEN_LOW … /* Active state of Sync-on-green (SoG) signal, 0/1 for LOW/HIGH respectively. */ #define V4L2_MBUS_VIDEO_SOG_ACTIVE_HIGH … #define V4L2_MBUS_VIDEO_SOG_ACTIVE_LOW … #define V4L2_MBUS_DATA_ENABLE_HIGH … #define V4L2_MBUS_DATA_ENABLE_LOW … /* Serial flags */ /* Clock non-continuous mode support. */ #define V4L2_MBUS_CSI2_NONCONTINUOUS_CLOCK … #define V4L2_MBUS_CSI2_MAX_DATA_LANES … /** * struct v4l2_mbus_config_mipi_csi2 - MIPI CSI-2 data bus configuration * @flags: media bus (V4L2_MBUS_*) flags * @data_lanes: an array of physical data lane indexes * @clock_lane: physical lane index of the clock lane * @num_data_lanes: number of data lanes * @lane_polarities: polarity of the lanes. The order is the same of * the physical lanes. */ struct v4l2_mbus_config_mipi_csi2 { … }; /** * struct v4l2_mbus_config_parallel - parallel data bus configuration * @flags: media bus (V4L2_MBUS_*) flags * @bus_width: bus width in bits * @data_shift: data shift in bits */ struct v4l2_mbus_config_parallel { … }; /** * struct v4l2_mbus_config_mipi_csi1 - CSI-1/CCP2 data bus configuration * @clock_inv: polarity of clock/strobe signal * false - not inverted, true - inverted * @strobe: false - data/clock, true - data/strobe * @lane_polarity: the polarities of the clock (index 0) and data lanes * index (1) * @data_lane: the number of the data lane * @clock_lane: the number of the clock lane */ struct v4l2_mbus_config_mipi_csi1 { … }; /** * enum v4l2_mbus_type - media bus type * @V4L2_MBUS_UNKNOWN: unknown bus type, no V4L2 mediabus configuration * @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_CSI1: MIPI CSI-1 serial interface * @V4L2_MBUS_CCP2: CCP2 (Compact Camera Port 2) * @V4L2_MBUS_CSI2_DPHY: MIPI CSI-2 serial interface, with D-PHY * @V4L2_MBUS_CSI2_CPHY: MIPI CSI-2 serial interface, with C-PHY * @V4L2_MBUS_DPI: MIPI VIDEO DPI interface * @V4L2_MBUS_INVALID: invalid bus type (keep as last) */ enum v4l2_mbus_type { … }; /** * struct v4l2_mbus_config - media bus configuration * @type: interface type * @bus: bus configuration data structure * @bus.parallel: embedded &struct v4l2_mbus_config_parallel. * Used if the bus is parallel or BT.656. * @bus.mipi_csi1: embedded &struct v4l2_mbus_config_mipi_csi1. * Used if the bus is MIPI Alliance's Camera Serial * Interface version 1 (MIPI CSI1) or Standard * Mobile Imaging Architecture's Compact Camera Port 2 * (SMIA CCP2). * @bus.mipi_csi2: embedded &struct v4l2_mbus_config_mipi_csi2. * Used if the bus is MIPI Alliance's Camera Serial * Interface version 2 (MIPI CSI2). */ struct v4l2_mbus_config { … }; /** * v4l2_fill_pix_format - Ancillary routine that fills a &struct * v4l2_pix_format fields from a &struct v4l2_mbus_framefmt. * * @pix_fmt: pointer to &struct v4l2_pix_format to be filled * @mbus_fmt: pointer to &struct v4l2_mbus_framefmt to be used as model */ static inline void v4l2_fill_pix_format(struct v4l2_pix_format *pix_fmt, const struct v4l2_mbus_framefmt *mbus_fmt) { … } /** * v4l2_fill_mbus_format - Ancillary routine that fills a &struct * v4l2_mbus_framefmt from a &struct v4l2_pix_format and a * data format code. * * @mbus_fmt: pointer to &struct v4l2_mbus_framefmt to be filled * @pix_fmt: pointer to &struct v4l2_pix_format to be used as model * @code: data format code (from &enum v4l2_mbus_pixelcode) */ static inline void v4l2_fill_mbus_format(struct v4l2_mbus_framefmt *mbus_fmt, const struct v4l2_pix_format *pix_fmt, u32 code) { … } /** * v4l2_fill_pix_format_mplane - Ancillary routine that fills a &struct * v4l2_pix_format_mplane fields from a media bus structure. * * @pix_mp_fmt: pointer to &struct v4l2_pix_format_mplane to be filled * @mbus_fmt: pointer to &struct v4l2_mbus_framefmt to be used as model */ static inline void v4l2_fill_pix_format_mplane(struct v4l2_pix_format_mplane *pix_mp_fmt, const struct v4l2_mbus_framefmt *mbus_fmt) { … } /** * v4l2_fill_mbus_format_mplane - Ancillary routine that fills a &struct * v4l2_mbus_framefmt from a &struct v4l2_pix_format_mplane. * * @mbus_fmt: pointer to &struct v4l2_mbus_framefmt to be filled * @pix_mp_fmt: pointer to &struct v4l2_pix_format_mplane to be used as model */ static inline void v4l2_fill_mbus_format_mplane(struct v4l2_mbus_framefmt *mbus_fmt, const struct v4l2_pix_format_mplane *pix_mp_fmt) { … } #endif
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