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254 lines
8.7 KiB
254 lines
8.7 KiB
/* 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 <[email protected]> |
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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_DPI: MIPI VIDEO DPI interface |
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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_DPI, |
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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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