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The v4l2_subdev core s_power op was used for two different things: power on/off sensors or video decoders/encoders and to put a tuner in standby (and only the tuner!). There is no 'tuner wakeup' op, that's done automatically when the tuner is accessed. The danger with calling (s_power, 0) to put a tuner into standby is that it is usually broadcast for all subdevs. So a video receiver subdev that supports s_power will also be powered off, and since there is no corresponding (s_power, 1) they will never be powered on again. In addition, this is specifically meant for tuners only since they draw the most current. This patch adds a new tuner op called 'standby' and replaces all calls to (core, s_power, 0) by (tuner, standby). This prevents confusion between the two uses of s_power. Note that there is no overlap: bridge drivers either just want to put the tuner into standby, or they deal with powering on/off sensors. Never both. This also makes it easier to replace s_power for the remaining bridge drivers with some PM code later. Whether we want something cleaner for tuners in the future is a separate topic. There is a lot of legacy code surrounding tuners, and I am very hesitant about making changes there. Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com> Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
1127 lines
41 KiB
C
1127 lines
41 KiB
C
/*
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* V4L2 sub-device support header.
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*
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* Copyright (C) 2008 Hans Verkuil <hverkuil@xs4all.nl>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*/
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#ifndef _V4L2_SUBDEV_H
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#define _V4L2_SUBDEV_H
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#include <linux/types.h>
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#include <linux/v4l2-subdev.h>
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#include <media/media-entity.h>
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#include <media/v4l2-async.h>
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#include <media/v4l2-common.h>
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#include <media/v4l2-dev.h>
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#include <media/v4l2-fh.h>
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#include <media/v4l2-mediabus.h>
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/* generic v4l2_device notify callback notification values */
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#define V4L2_SUBDEV_IR_RX_NOTIFY _IOW('v', 0, u32)
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#define V4L2_SUBDEV_IR_RX_FIFO_SERVICE_REQ 0x00000001
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#define V4L2_SUBDEV_IR_RX_END_OF_RX_DETECTED 0x00000002
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#define V4L2_SUBDEV_IR_RX_HW_FIFO_OVERRUN 0x00000004
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#define V4L2_SUBDEV_IR_RX_SW_FIFO_OVERRUN 0x00000008
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#define V4L2_SUBDEV_IR_TX_NOTIFY _IOW('v', 1, u32)
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#define V4L2_SUBDEV_IR_TX_FIFO_SERVICE_REQ 0x00000001
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#define V4L2_DEVICE_NOTIFY_EVENT _IOW('v', 2, struct v4l2_event)
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struct v4l2_device;
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struct v4l2_ctrl_handler;
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struct v4l2_event;
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struct v4l2_event_subscription;
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struct v4l2_fh;
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struct v4l2_subdev;
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struct v4l2_subdev_fh;
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struct tuner_setup;
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struct v4l2_mbus_frame_desc;
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/**
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* struct v4l2_decode_vbi_line - used to decode_vbi_line
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*
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* @is_second_field: Set to 0 for the first (odd) field;
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* set to 1 for the second (even) field.
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* @p: Pointer to the sliced VBI data from the decoder. On exit, points to
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* the start of the payload.
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* @line: Line number of the sliced VBI data (1-23)
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* @type: VBI service type (V4L2_SLICED_*). 0 if no service found
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*/
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struct v4l2_decode_vbi_line {
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u32 is_second_field;
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u8 *p;
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u32 line;
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u32 type;
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};
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/*
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* Sub-devices are devices that are connected somehow to the main bridge
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* device. These devices are usually audio/video muxers/encoders/decoders or
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* sensors and webcam controllers.
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*
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* Usually these devices are controlled through an i2c bus, but other busses
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* may also be used.
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*
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* The v4l2_subdev struct provides a way of accessing these devices in a
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* generic manner. Most operations that these sub-devices support fall in
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* a few categories: core ops, audio ops, video ops and tuner ops.
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*
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* More categories can be added if needed, although this should remain a
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* limited set (no more than approx. 8 categories).
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*
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* Each category has its own set of ops that subdev drivers can implement.
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*
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* A subdev driver can leave the pointer to the category ops NULL if
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* it does not implement them (e.g. an audio subdev will generally not
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* implement the video category ops). The exception is the core category:
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* this must always be present.
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*
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* These ops are all used internally so it is no problem to change, remove
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* or add ops or move ops from one to another category. Currently these
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* ops are based on the original ioctls, but since ops are not limited to
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* one argument there is room for improvement here once all i2c subdev
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* drivers are converted to use these ops.
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*/
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/*
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* Core ops: it is highly recommended to implement at least these ops:
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*
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* log_status
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* g_register
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* s_register
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*
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* This provides basic debugging support.
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*
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* The ioctl ops is meant for generic ioctl-like commands. Depending on
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* the use-case it might be better to use subdev-specific ops (currently
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* not yet implemented) since ops provide proper type-checking.
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*/
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/**
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* enum v4l2_subdev_io_pin_bits - Subdevice external IO pin configuration
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* bits
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*
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* @V4L2_SUBDEV_IO_PIN_DISABLE: disables a pin config. ENABLE assumed.
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* @V4L2_SUBDEV_IO_PIN_OUTPUT: set it if pin is an output.
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* @V4L2_SUBDEV_IO_PIN_INPUT: set it if pin is an input.
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* @V4L2_SUBDEV_IO_PIN_SET_VALUE: to set the output value via
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* &struct v4l2_subdev_io_pin_config->value.
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* @V4L2_SUBDEV_IO_PIN_ACTIVE_LOW: pin active is bit 0.
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* Otherwise, ACTIVE HIGH is assumed.
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*/
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enum v4l2_subdev_io_pin_bits {
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V4L2_SUBDEV_IO_PIN_DISABLE = 0,
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V4L2_SUBDEV_IO_PIN_OUTPUT = 1,
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V4L2_SUBDEV_IO_PIN_INPUT = 2,
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V4L2_SUBDEV_IO_PIN_SET_VALUE = 3,
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V4L2_SUBDEV_IO_PIN_ACTIVE_LOW = 4,
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};
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/**
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* struct v4l2_subdev_io_pin_config - Subdevice external IO pin configuration
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*
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* @flags: bitmask with flags for this pin's config, whose bits are defined by
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* &enum v4l2_subdev_io_pin_bits.
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* @pin: Chip external IO pin to configure
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* @function: Internal signal pad/function to route to IO pin
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* @value: Initial value for pin - e.g. GPIO output value
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* @strength: Pin drive strength
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*/
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struct v4l2_subdev_io_pin_config {
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u32 flags;
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u8 pin;
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u8 function;
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u8 value;
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u8 strength;
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};
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/**
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* struct v4l2_subdev_core_ops - Define core ops callbacks for subdevs
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*
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* @log_status: callback for VIDIOC_LOG_STATUS() ioctl handler code.
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*
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* @s_io_pin_config: configure one or more chip I/O pins for chips that
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* multiplex different internal signal pads out to IO pins. This function
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* takes a pointer to an array of 'n' pin configuration entries, one for
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* each pin being configured. This function could be called at times
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* other than just subdevice initialization.
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*
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* @init: initialize the sensor registers to some sort of reasonable default
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* values. Do not use for new drivers and should be removed in existing
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* drivers.
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*
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* @load_fw: load firmware.
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*
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* @reset: generic reset command. The argument selects which subsystems to
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* reset. Passing 0 will always reset the whole chip. Do not use for new
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* drivers without discussing this first on the linux-media mailinglist.
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* There should be no reason normally to reset a device.
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*
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* @s_gpio: set GPIO pins. Very simple right now, might need to be extended with
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* a direction argument if needed.
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*
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* @ioctl: called at the end of ioctl() syscall handler at the V4L2 core.
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* used to provide support for private ioctls used on the driver.
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*
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* @compat_ioctl32: called when a 32 bits application uses a 64 bits Kernel,
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* in order to fix data passed from/to userspace.
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*
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* @g_register: callback for VIDIOC_DBG_G_REGISTER() ioctl handler code.
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*
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* @s_register: callback for VIDIOC_DBG_S_REGISTER() ioctl handler code.
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*
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* @s_power: puts subdevice in power saving mode (on == 0) or normal operation
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* mode (on == 1).
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*
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* @interrupt_service_routine: Called by the bridge chip's interrupt service
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* handler, when an interrupt status has be raised due to this subdev,
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* so that this subdev can handle the details. It may schedule work to be
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* performed later. It must not sleep. **Called from an IRQ context**.
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*
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* @subscribe_event: used by the drivers to request the control framework that
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* for it to be warned when the value of a control changes.
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*
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* @unsubscribe_event: remove event subscription from the control framework.
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*/
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struct v4l2_subdev_core_ops {
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int (*log_status)(struct v4l2_subdev *sd);
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int (*s_io_pin_config)(struct v4l2_subdev *sd, size_t n,
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struct v4l2_subdev_io_pin_config *pincfg);
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int (*init)(struct v4l2_subdev *sd, u32 val);
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int (*load_fw)(struct v4l2_subdev *sd);
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int (*reset)(struct v4l2_subdev *sd, u32 val);
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int (*s_gpio)(struct v4l2_subdev *sd, u32 val);
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long (*ioctl)(struct v4l2_subdev *sd, unsigned int cmd, void *arg);
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#ifdef CONFIG_COMPAT
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long (*compat_ioctl32)(struct v4l2_subdev *sd, unsigned int cmd,
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unsigned long arg);
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#endif
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#ifdef CONFIG_VIDEO_ADV_DEBUG
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int (*g_register)(struct v4l2_subdev *sd, struct v4l2_dbg_register *reg);
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int (*s_register)(struct v4l2_subdev *sd, const struct v4l2_dbg_register *reg);
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#endif
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int (*s_power)(struct v4l2_subdev *sd, int on);
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int (*interrupt_service_routine)(struct v4l2_subdev *sd,
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u32 status, bool *handled);
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int (*subscribe_event)(struct v4l2_subdev *sd, struct v4l2_fh *fh,
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struct v4l2_event_subscription *sub);
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int (*unsubscribe_event)(struct v4l2_subdev *sd, struct v4l2_fh *fh,
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struct v4l2_event_subscription *sub);
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};
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/**
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* struct v4l2_subdev_tuner_ops - Callbacks used when v4l device was opened
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* in radio mode.
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*
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* @standby: puts the tuner in standby mode. It will be woken up
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* automatically the next time it is used.
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*
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* @s_radio: callback that switches the tuner to radio mode.
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* drivers should explicitly call it when a tuner ops should
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* operate on radio mode, before being able to handle it.
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* Used on devices that have both AM/FM radio receiver and TV.
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*
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* @s_frequency: callback for VIDIOC_S_FREQUENCY() ioctl handler code.
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*
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* @g_frequency: callback for VIDIOC_G_FREQUENCY() ioctl handler code.
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* freq->type must be filled in. Normally done by video_ioctl2()
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* or the bridge driver.
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*
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* @enum_freq_bands: callback for VIDIOC_ENUM_FREQ_BANDS() ioctl handler code.
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*
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* @g_tuner: callback for VIDIOC_G_TUNER() ioctl handler code.
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*
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* @s_tuner: callback for VIDIOC_S_TUNER() ioctl handler code. @vt->type must be
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* filled in. Normally done by video_ioctl2 or the
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* bridge driver.
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*
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* @g_modulator: callback for VIDIOC_G_MODULATOR() ioctl handler code.
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*
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* @s_modulator: callback for VIDIOC_S_MODULATOR() ioctl handler code.
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*
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* @s_type_addr: sets tuner type and its I2C addr.
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*
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* @s_config: sets tda9887 specific stuff, like port1, port2 and qss
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*
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* .. note::
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*
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* On devices that have both AM/FM and TV, it is up to the driver
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* to explicitly call s_radio when the tuner should be switched to
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* radio mode, before handling other &struct v4l2_subdev_tuner_ops
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* that would require it. An example of such usage is::
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*
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* static void s_frequency(void *priv, const struct v4l2_frequency *f)
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* {
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* ...
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* if (f.type == V4L2_TUNER_RADIO)
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* v4l2_device_call_all(v4l2_dev, 0, tuner, s_radio);
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* ...
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* v4l2_device_call_all(v4l2_dev, 0, tuner, s_frequency);
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* }
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*/
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struct v4l2_subdev_tuner_ops {
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int (*standby)(struct v4l2_subdev *sd);
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int (*s_radio)(struct v4l2_subdev *sd);
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int (*s_frequency)(struct v4l2_subdev *sd, const struct v4l2_frequency *freq);
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int (*g_frequency)(struct v4l2_subdev *sd, struct v4l2_frequency *freq);
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int (*enum_freq_bands)(struct v4l2_subdev *sd, struct v4l2_frequency_band *band);
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int (*g_tuner)(struct v4l2_subdev *sd, struct v4l2_tuner *vt);
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int (*s_tuner)(struct v4l2_subdev *sd, const struct v4l2_tuner *vt);
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int (*g_modulator)(struct v4l2_subdev *sd, struct v4l2_modulator *vm);
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int (*s_modulator)(struct v4l2_subdev *sd, const struct v4l2_modulator *vm);
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int (*s_type_addr)(struct v4l2_subdev *sd, struct tuner_setup *type);
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int (*s_config)(struct v4l2_subdev *sd, const struct v4l2_priv_tun_config *config);
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};
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/**
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* struct v4l2_subdev_audio_ops - Callbacks used for audio-related settings
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*
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* @s_clock_freq: set the frequency (in Hz) of the audio clock output.
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* Used to slave an audio processor to the video decoder, ensuring that
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* audio and video remain synchronized. Usual values for the frequency
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* are 48000, 44100 or 32000 Hz. If the frequency is not supported, then
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* -EINVAL is returned.
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*
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* @s_i2s_clock_freq: sets I2S speed in bps. This is used to provide a standard
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* way to select I2S clock used by driving digital audio streams at some
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* board designs. Usual values for the frequency are 1024000 and 2048000.
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* If the frequency is not supported, then %-EINVAL is returned.
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*
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* @s_routing: used to define the input and/or output pins of an audio chip,
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* and any additional configuration data.
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* Never attempt to use user-level input IDs (e.g. Composite, S-Video,
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* Tuner) at this level. An i2c device shouldn't know about whether an
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* input pin is connected to a Composite connector, become on another
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* board or platform it might be connected to something else entirely.
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* The calling driver is responsible for mapping a user-level input to
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* the right pins on the i2c device.
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*
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* @s_stream: used to notify the audio code that stream will start or has
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* stopped.
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*/
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struct v4l2_subdev_audio_ops {
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int (*s_clock_freq)(struct v4l2_subdev *sd, u32 freq);
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int (*s_i2s_clock_freq)(struct v4l2_subdev *sd, u32 freq);
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int (*s_routing)(struct v4l2_subdev *sd, u32 input, u32 output, u32 config);
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int (*s_stream)(struct v4l2_subdev *sd, int enable);
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};
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/**
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* enum v4l2_mbus_frame_desc_entry - media bus frame description flags
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*
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* @V4L2_MBUS_FRAME_DESC_FL_LEN_MAX:
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* Indicates that &struct v4l2_mbus_frame_desc_entry->length field
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* specifies maximum data length.
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* @V4L2_MBUS_FRAME_DESC_FL_BLOB:
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* Indicates that the format does not have line offsets, i.e.
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* the receiver should use 1D DMA.
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*/
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enum v4l2_mbus_frame_desc_flags {
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V4L2_MBUS_FRAME_DESC_FL_LEN_MAX = BIT(0),
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V4L2_MBUS_FRAME_DESC_FL_BLOB = BIT(1),
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};
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/**
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* struct v4l2_mbus_frame_desc_entry - media bus frame description structure
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*
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* @flags: bitmask flags, as defined by &enum v4l2_mbus_frame_desc_flags.
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* @pixelcode: media bus pixel code, valid if @flags
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* %FRAME_DESC_FL_BLOB is not set.
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* @length: number of octets per frame, valid if @flags
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* %V4L2_MBUS_FRAME_DESC_FL_LEN_MAX is set.
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*/
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struct v4l2_mbus_frame_desc_entry {
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enum v4l2_mbus_frame_desc_flags flags;
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u32 pixelcode;
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u32 length;
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};
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#define V4L2_FRAME_DESC_ENTRY_MAX 4
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/**
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* struct v4l2_mbus_frame_desc - media bus data frame description
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* @entry: frame descriptors array
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* @num_entries: number of entries in @entry array
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*/
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struct v4l2_mbus_frame_desc {
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struct v4l2_mbus_frame_desc_entry entry[V4L2_FRAME_DESC_ENTRY_MAX];
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unsigned short num_entries;
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};
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/**
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* struct v4l2_subdev_video_ops - Callbacks used when v4l device was opened
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* in video mode.
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*
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* @s_routing: see s_routing in audio_ops, except this version is for video
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* devices.
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*
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* @s_crystal_freq: sets the frequency of the crystal used to generate the
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* clocks in Hz. An extra flags field allows device specific configuration
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* regarding clock frequency dividers, etc. If not used, then set flags
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* to 0. If the frequency is not supported, then -EINVAL is returned.
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*
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* @g_std: callback for VIDIOC_G_STD() ioctl handler code.
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*
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* @s_std: callback for VIDIOC_S_STD() ioctl handler code.
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*
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* @s_std_output: set v4l2_std_id for video OUTPUT devices. This is ignored by
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* video input devices.
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*
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* @g_std_output: get current standard for video OUTPUT devices. This is ignored
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* by video input devices.
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*
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* @querystd: callback for VIDIOC_QUERYSTD() ioctl handler code.
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*
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* @g_tvnorms: get &v4l2_std_id with all standards supported by the video
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* CAPTURE device. This is ignored by video output devices.
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*
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* @g_tvnorms_output: get v4l2_std_id with all standards supported by the video
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* OUTPUT device. This is ignored by video capture devices.
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*
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* @g_input_status: get input status. Same as the status field in the
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* &struct &v4l2_input
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*
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* @s_stream: used to notify the driver that a video stream will start or has
|
|
* stopped.
|
|
*
|
|
* @g_pixelaspect: callback to return the pixelaspect ratio.
|
|
*
|
|
* @g_frame_interval: callback for VIDIOC_SUBDEV_G_FRAME_INTERVAL()
|
|
* ioctl handler code.
|
|
*
|
|
* @s_frame_interval: callback for VIDIOC_SUBDEV_S_FRAME_INTERVAL()
|
|
* ioctl handler code.
|
|
*
|
|
* @s_dv_timings: Set custom dv timings in the sub device. This is used
|
|
* when sub device is capable of setting detailed timing information
|
|
* in the hardware to generate/detect the video signal.
|
|
*
|
|
* @g_dv_timings: Get custom dv timings in the sub device.
|
|
*
|
|
* @query_dv_timings: callback for VIDIOC_QUERY_DV_TIMINGS() ioctl handler code.
|
|
*
|
|
* @g_mbus_config: get supported mediabus configurations
|
|
*
|
|
* @s_mbus_config: set a certain mediabus configuration. This operation is added
|
|
* for compatibility with soc-camera drivers and should not be used by new
|
|
* software.
|
|
*
|
|
* @s_rx_buffer: set a host allocated memory buffer for the subdev. The subdev
|
|
* can adjust @size to a lower value and must not write more data to the
|
|
* buffer starting at @data than the original value of @size.
|
|
*/
|
|
struct v4l2_subdev_video_ops {
|
|
int (*s_routing)(struct v4l2_subdev *sd, u32 input, u32 output, u32 config);
|
|
int (*s_crystal_freq)(struct v4l2_subdev *sd, u32 freq, u32 flags);
|
|
int (*g_std)(struct v4l2_subdev *sd, v4l2_std_id *norm);
|
|
int (*s_std)(struct v4l2_subdev *sd, v4l2_std_id norm);
|
|
int (*s_std_output)(struct v4l2_subdev *sd, v4l2_std_id std);
|
|
int (*g_std_output)(struct v4l2_subdev *sd, v4l2_std_id *std);
|
|
int (*querystd)(struct v4l2_subdev *sd, v4l2_std_id *std);
|
|
int (*g_tvnorms)(struct v4l2_subdev *sd, v4l2_std_id *std);
|
|
int (*g_tvnorms_output)(struct v4l2_subdev *sd, v4l2_std_id *std);
|
|
int (*g_input_status)(struct v4l2_subdev *sd, u32 *status);
|
|
int (*s_stream)(struct v4l2_subdev *sd, int enable);
|
|
int (*g_pixelaspect)(struct v4l2_subdev *sd, struct v4l2_fract *aspect);
|
|
int (*g_frame_interval)(struct v4l2_subdev *sd,
|
|
struct v4l2_subdev_frame_interval *interval);
|
|
int (*s_frame_interval)(struct v4l2_subdev *sd,
|
|
struct v4l2_subdev_frame_interval *interval);
|
|
int (*s_dv_timings)(struct v4l2_subdev *sd,
|
|
struct v4l2_dv_timings *timings);
|
|
int (*g_dv_timings)(struct v4l2_subdev *sd,
|
|
struct v4l2_dv_timings *timings);
|
|
int (*query_dv_timings)(struct v4l2_subdev *sd,
|
|
struct v4l2_dv_timings *timings);
|
|
int (*g_mbus_config)(struct v4l2_subdev *sd,
|
|
struct v4l2_mbus_config *cfg);
|
|
int (*s_mbus_config)(struct v4l2_subdev *sd,
|
|
const struct v4l2_mbus_config *cfg);
|
|
int (*s_rx_buffer)(struct v4l2_subdev *sd, void *buf,
|
|
unsigned int *size);
|
|
};
|
|
|
|
/**
|
|
* struct v4l2_subdev_vbi_ops - Callbacks used when v4l device was opened
|
|
* in video mode via the vbi device node.
|
|
*
|
|
* @decode_vbi_line: video decoders that support sliced VBI need to implement
|
|
* this ioctl. Field p of the &struct v4l2_decode_vbi_line is set to the
|
|
* start of the VBI data that was generated by the decoder. The driver
|
|
* then parses the sliced VBI data and sets the other fields in the
|
|
* struct accordingly. The pointer p is updated to point to the start of
|
|
* the payload which can be copied verbatim into the data field of the
|
|
* &struct v4l2_sliced_vbi_data. If no valid VBI data was found, then the
|
|
* type field is set to 0 on return.
|
|
*
|
|
* @s_vbi_data: used to generate VBI signals on a video signal.
|
|
* &struct v4l2_sliced_vbi_data is filled with the data packets that
|
|
* should be output. Note that if you set the line field to 0, then that
|
|
* VBI signal is disabled. If no valid VBI data was found, then the type
|
|
* field is set to 0 on return.
|
|
*
|
|
* @g_vbi_data: used to obtain the sliced VBI packet from a readback register.
|
|
* Not all video decoders support this. If no data is available because
|
|
* the readback register contains invalid or erroneous data %-EIO is
|
|
* returned. Note that you must fill in the 'id' member and the 'field'
|
|
* member (to determine whether CC data from the first or second field
|
|
* should be obtained).
|
|
*
|
|
* @g_sliced_vbi_cap: callback for VIDIOC_G_SLICED_VBI_CAP() ioctl handler
|
|
* code.
|
|
*
|
|
* @s_raw_fmt: setup the video encoder/decoder for raw VBI.
|
|
*
|
|
* @g_sliced_fmt: retrieve the current sliced VBI settings.
|
|
*
|
|
* @s_sliced_fmt: setup the sliced VBI settings.
|
|
*/
|
|
struct v4l2_subdev_vbi_ops {
|
|
int (*decode_vbi_line)(struct v4l2_subdev *sd, struct v4l2_decode_vbi_line *vbi_line);
|
|
int (*s_vbi_data)(struct v4l2_subdev *sd, const struct v4l2_sliced_vbi_data *vbi_data);
|
|
int (*g_vbi_data)(struct v4l2_subdev *sd, struct v4l2_sliced_vbi_data *vbi_data);
|
|
int (*g_sliced_vbi_cap)(struct v4l2_subdev *sd, struct v4l2_sliced_vbi_cap *cap);
|
|
int (*s_raw_fmt)(struct v4l2_subdev *sd, struct v4l2_vbi_format *fmt);
|
|
int (*g_sliced_fmt)(struct v4l2_subdev *sd, struct v4l2_sliced_vbi_format *fmt);
|
|
int (*s_sliced_fmt)(struct v4l2_subdev *sd, struct v4l2_sliced_vbi_format *fmt);
|
|
};
|
|
|
|
/**
|
|
* struct v4l2_subdev_sensor_ops - v4l2-subdev sensor operations
|
|
* @g_skip_top_lines: number of lines at the top of the image to be skipped.
|
|
* This is needed for some sensors, which always corrupt
|
|
* several top lines of the output image, or which send their
|
|
* metadata in them.
|
|
* @g_skip_frames: number of frames to skip at stream start. This is needed for
|
|
* buggy sensors that generate faulty frames when they are
|
|
* turned on.
|
|
*/
|
|
struct v4l2_subdev_sensor_ops {
|
|
int (*g_skip_top_lines)(struct v4l2_subdev *sd, u32 *lines);
|
|
int (*g_skip_frames)(struct v4l2_subdev *sd, u32 *frames);
|
|
};
|
|
|
|
/**
|
|
* enum v4l2_subdev_ir_mode- describes the type of IR supported
|
|
*
|
|
* @V4L2_SUBDEV_IR_MODE_PULSE_WIDTH: IR uses struct ir_raw_event records
|
|
*/
|
|
enum v4l2_subdev_ir_mode {
|
|
V4L2_SUBDEV_IR_MODE_PULSE_WIDTH,
|
|
};
|
|
|
|
/**
|
|
* struct v4l2_subdev_ir_parameters - Parameters for IR TX or TX
|
|
*
|
|
* @bytes_per_data_element: bytes per data element of data in read or
|
|
* write call.
|
|
* @mode: IR mode as defined by &enum v4l2_subdev_ir_mode.
|
|
* @enable: device is active if true
|
|
* @interrupt_enable: IR interrupts are enabled if true
|
|
* @shutdown: if true: set hardware to low/no power, false: normal mode
|
|
*
|
|
* @modulation: if true, it uses carrier, if false: baseband
|
|
* @max_pulse_width: maximum pulse width in ns, valid only for baseband signal
|
|
* @carrier_freq: carrier frequency in Hz, valid only for modulated signal
|
|
* @duty_cycle: duty cycle percentage, valid only for modulated signal
|
|
* @invert_level: invert signal level
|
|
*
|
|
* @invert_carrier_sense: Send 0/space as a carrier burst. used only in TX.
|
|
*
|
|
* @noise_filter_min_width: min time of a valid pulse, in ns. Used only for RX.
|
|
* @carrier_range_lower: Lower carrier range, in Hz, valid only for modulated
|
|
* signal. Used only for RX.
|
|
* @carrier_range_upper: Upper carrier range, in Hz, valid only for modulated
|
|
* signal. Used only for RX.
|
|
* @resolution: The receive resolution, in ns . Used only for RX.
|
|
*/
|
|
struct v4l2_subdev_ir_parameters {
|
|
unsigned int bytes_per_data_element;
|
|
enum v4l2_subdev_ir_mode mode;
|
|
|
|
bool enable;
|
|
bool interrupt_enable;
|
|
bool shutdown;
|
|
|
|
bool modulation;
|
|
u32 max_pulse_width;
|
|
unsigned int carrier_freq;
|
|
unsigned int duty_cycle;
|
|
bool invert_level;
|
|
|
|
/* Tx only */
|
|
bool invert_carrier_sense;
|
|
|
|
/* Rx only */
|
|
u32 noise_filter_min_width;
|
|
unsigned int carrier_range_lower;
|
|
unsigned int carrier_range_upper;
|
|
u32 resolution;
|
|
};
|
|
|
|
/**
|
|
* struct v4l2_subdev_ir_ops - operations for IR subdevices
|
|
*
|
|
* @rx_read: Reads received codes or pulse width data.
|
|
* The semantics are similar to a non-blocking read() call.
|
|
* @rx_g_parameters: Get the current operating parameters and state of the
|
|
* the IR receiver.
|
|
* @rx_s_parameters: Set the current operating parameters and state of the
|
|
* the IR receiver. It is recommended to call
|
|
* [rt]x_g_parameters first to fill out the current state, and only change
|
|
* the fields that need to be changed. Upon return, the actual device
|
|
* operating parameters and state will be returned. Note that hardware
|
|
* limitations may prevent the actual settings from matching the requested
|
|
* settings - e.g. an actual carrier setting of 35,904 Hz when 36,000 Hz
|
|
* was requested. An exception is when the shutdown parameter is true.
|
|
* The last used operational parameters will be returned, but the actual
|
|
* state of the hardware be different to minimize power consumption and
|
|
* processing when shutdown is true.
|
|
*
|
|
* @tx_write: Writes codes or pulse width data for transmission.
|
|
* The semantics are similar to a non-blocking write() call.
|
|
* @tx_g_parameters: Get the current operating parameters and state of the
|
|
* the IR transmitter.
|
|
* @tx_s_parameters: Set the current operating parameters and state of the
|
|
* the IR transmitter. It is recommended to call
|
|
* [rt]x_g_parameters first to fill out the current state, and only change
|
|
* the fields that need to be changed. Upon return, the actual device
|
|
* operating parameters and state will be returned. Note that hardware
|
|
* limitations may prevent the actual settings from matching the requested
|
|
* settings - e.g. an actual carrier setting of 35,904 Hz when 36,000 Hz
|
|
* was requested. An exception is when the shutdown parameter is true.
|
|
* The last used operational parameters will be returned, but the actual
|
|
* state of the hardware be different to minimize power consumption and
|
|
* processing when shutdown is true.
|
|
*/
|
|
struct v4l2_subdev_ir_ops {
|
|
/* Receiver */
|
|
int (*rx_read)(struct v4l2_subdev *sd, u8 *buf, size_t count,
|
|
ssize_t *num);
|
|
|
|
int (*rx_g_parameters)(struct v4l2_subdev *sd,
|
|
struct v4l2_subdev_ir_parameters *params);
|
|
int (*rx_s_parameters)(struct v4l2_subdev *sd,
|
|
struct v4l2_subdev_ir_parameters *params);
|
|
|
|
/* Transmitter */
|
|
int (*tx_write)(struct v4l2_subdev *sd, u8 *buf, size_t count,
|
|
ssize_t *num);
|
|
|
|
int (*tx_g_parameters)(struct v4l2_subdev *sd,
|
|
struct v4l2_subdev_ir_parameters *params);
|
|
int (*tx_s_parameters)(struct v4l2_subdev *sd,
|
|
struct v4l2_subdev_ir_parameters *params);
|
|
};
|
|
|
|
/**
|
|
* struct v4l2_subdev_pad_config - Used for storing subdev pad information.
|
|
*
|
|
* @try_fmt: &struct v4l2_mbus_framefmt
|
|
* @try_crop: &struct v4l2_rect to be used for crop
|
|
* @try_compose: &struct v4l2_rect to be used for compose
|
|
*
|
|
* This structure only needs to be passed to the pad op if the 'which' field
|
|
* of the main argument is set to %V4L2_SUBDEV_FORMAT_TRY. For
|
|
* %V4L2_SUBDEV_FORMAT_ACTIVE it is safe to pass %NULL.
|
|
*/
|
|
struct v4l2_subdev_pad_config {
|
|
struct v4l2_mbus_framefmt try_fmt;
|
|
struct v4l2_rect try_crop;
|
|
struct v4l2_rect try_compose;
|
|
};
|
|
|
|
/**
|
|
* struct v4l2_subdev_pad_ops - v4l2-subdev pad level operations
|
|
*
|
|
* @init_cfg: initialize the pad config to default values
|
|
* @enum_mbus_code: callback for VIDIOC_SUBDEV_ENUM_MBUS_CODE() ioctl handler
|
|
* code.
|
|
* @enum_frame_size: callback for VIDIOC_SUBDEV_ENUM_FRAME_SIZE() ioctl handler
|
|
* code.
|
|
*
|
|
* @enum_frame_interval: callback for VIDIOC_SUBDEV_ENUM_FRAME_INTERVAL() ioctl
|
|
* handler code.
|
|
*
|
|
* @get_fmt: callback for VIDIOC_SUBDEV_G_FMT() ioctl handler code.
|
|
*
|
|
* @set_fmt: callback for VIDIOC_SUBDEV_S_FMT() ioctl handler code.
|
|
*
|
|
* @get_selection: callback for VIDIOC_SUBDEV_G_SELECTION() ioctl handler code.
|
|
*
|
|
* @set_selection: callback for VIDIOC_SUBDEV_S_SELECTION() ioctl handler code.
|
|
*
|
|
* @get_edid: callback for VIDIOC_SUBDEV_G_EDID() ioctl handler code.
|
|
*
|
|
* @set_edid: callback for VIDIOC_SUBDEV_S_EDID() ioctl handler code.
|
|
*
|
|
* @dv_timings_cap: callback for VIDIOC_SUBDEV_DV_TIMINGS_CAP() ioctl handler
|
|
* code.
|
|
*
|
|
* @enum_dv_timings: callback for VIDIOC_SUBDEV_ENUM_DV_TIMINGS() ioctl handler
|
|
* code.
|
|
*
|
|
* @link_validate: used by the media controller code to check if the links
|
|
* that belongs to a pipeline can be used for stream.
|
|
*
|
|
* @get_frame_desc: get the current low level media bus frame parameters.
|
|
*
|
|
* @set_frame_desc: set the low level media bus frame parameters, @fd array
|
|
* may be adjusted by the subdev driver to device capabilities.
|
|
*/
|
|
struct v4l2_subdev_pad_ops {
|
|
int (*init_cfg)(struct v4l2_subdev *sd,
|
|
struct v4l2_subdev_pad_config *cfg);
|
|
int (*enum_mbus_code)(struct v4l2_subdev *sd,
|
|
struct v4l2_subdev_pad_config *cfg,
|
|
struct v4l2_subdev_mbus_code_enum *code);
|
|
int (*enum_frame_size)(struct v4l2_subdev *sd,
|
|
struct v4l2_subdev_pad_config *cfg,
|
|
struct v4l2_subdev_frame_size_enum *fse);
|
|
int (*enum_frame_interval)(struct v4l2_subdev *sd,
|
|
struct v4l2_subdev_pad_config *cfg,
|
|
struct v4l2_subdev_frame_interval_enum *fie);
|
|
int (*get_fmt)(struct v4l2_subdev *sd,
|
|
struct v4l2_subdev_pad_config *cfg,
|
|
struct v4l2_subdev_format *format);
|
|
int (*set_fmt)(struct v4l2_subdev *sd,
|
|
struct v4l2_subdev_pad_config *cfg,
|
|
struct v4l2_subdev_format *format);
|
|
int (*get_selection)(struct v4l2_subdev *sd,
|
|
struct v4l2_subdev_pad_config *cfg,
|
|
struct v4l2_subdev_selection *sel);
|
|
int (*set_selection)(struct v4l2_subdev *sd,
|
|
struct v4l2_subdev_pad_config *cfg,
|
|
struct v4l2_subdev_selection *sel);
|
|
int (*get_edid)(struct v4l2_subdev *sd, struct v4l2_edid *edid);
|
|
int (*set_edid)(struct v4l2_subdev *sd, struct v4l2_edid *edid);
|
|
int (*dv_timings_cap)(struct v4l2_subdev *sd,
|
|
struct v4l2_dv_timings_cap *cap);
|
|
int (*enum_dv_timings)(struct v4l2_subdev *sd,
|
|
struct v4l2_enum_dv_timings *timings);
|
|
#ifdef CONFIG_MEDIA_CONTROLLER
|
|
int (*link_validate)(struct v4l2_subdev *sd, struct media_link *link,
|
|
struct v4l2_subdev_format *source_fmt,
|
|
struct v4l2_subdev_format *sink_fmt);
|
|
#endif /* CONFIG_MEDIA_CONTROLLER */
|
|
int (*get_frame_desc)(struct v4l2_subdev *sd, unsigned int pad,
|
|
struct v4l2_mbus_frame_desc *fd);
|
|
int (*set_frame_desc)(struct v4l2_subdev *sd, unsigned int pad,
|
|
struct v4l2_mbus_frame_desc *fd);
|
|
};
|
|
|
|
/**
|
|
* struct v4l2_subdev_ops - Subdev operations
|
|
*
|
|
* @core: pointer to &struct v4l2_subdev_core_ops. Can be %NULL
|
|
* @tuner: pointer to &struct v4l2_subdev_tuner_ops. Can be %NULL
|
|
* @audio: pointer to &struct v4l2_subdev_audio_ops. Can be %NULL
|
|
* @video: pointer to &struct v4l2_subdev_video_ops. Can be %NULL
|
|
* @vbi: pointer to &struct v4l2_subdev_vbi_ops. Can be %NULL
|
|
* @ir: pointer to &struct v4l2_subdev_ir_ops. Can be %NULL
|
|
* @sensor: pointer to &struct v4l2_subdev_sensor_ops. Can be %NULL
|
|
* @pad: pointer to &struct v4l2_subdev_pad_ops. Can be %NULL
|
|
*/
|
|
struct v4l2_subdev_ops {
|
|
const struct v4l2_subdev_core_ops *core;
|
|
const struct v4l2_subdev_tuner_ops *tuner;
|
|
const struct v4l2_subdev_audio_ops *audio;
|
|
const struct v4l2_subdev_video_ops *video;
|
|
const struct v4l2_subdev_vbi_ops *vbi;
|
|
const struct v4l2_subdev_ir_ops *ir;
|
|
const struct v4l2_subdev_sensor_ops *sensor;
|
|
const struct v4l2_subdev_pad_ops *pad;
|
|
};
|
|
|
|
/**
|
|
* struct v4l2_subdev_internal_ops - V4L2 subdev internal ops
|
|
*
|
|
* @registered: called when this subdev is registered. When called the v4l2_dev
|
|
* field is set to the correct v4l2_device.
|
|
*
|
|
* @unregistered: called when this subdev is unregistered. When called the
|
|
* v4l2_dev field is still set to the correct v4l2_device.
|
|
*
|
|
* @open: called when the subdev device node is opened by an application.
|
|
*
|
|
* @close: called when the subdev device node is closed.
|
|
*
|
|
* .. note::
|
|
* Never call this from drivers, only the v4l2 framework can call
|
|
* these ops.
|
|
*/
|
|
struct v4l2_subdev_internal_ops {
|
|
int (*registered)(struct v4l2_subdev *sd);
|
|
void (*unregistered)(struct v4l2_subdev *sd);
|
|
int (*open)(struct v4l2_subdev *sd, struct v4l2_subdev_fh *fh);
|
|
int (*close)(struct v4l2_subdev *sd, struct v4l2_subdev_fh *fh);
|
|
};
|
|
|
|
#define V4L2_SUBDEV_NAME_SIZE 32
|
|
|
|
/* Set this flag if this subdev is a i2c device. */
|
|
#define V4L2_SUBDEV_FL_IS_I2C (1U << 0)
|
|
/* Set this flag if this subdev is a spi device. */
|
|
#define V4L2_SUBDEV_FL_IS_SPI (1U << 1)
|
|
/* Set this flag if this subdev needs a device node. */
|
|
#define V4L2_SUBDEV_FL_HAS_DEVNODE (1U << 2)
|
|
/* Set this flag if this subdev generates events. */
|
|
#define V4L2_SUBDEV_FL_HAS_EVENTS (1U << 3)
|
|
|
|
struct regulator_bulk_data;
|
|
|
|
/**
|
|
* struct v4l2_subdev_platform_data - regulators config struct
|
|
*
|
|
* @regulators: Optional regulators used to power on/off the subdevice
|
|
* @num_regulators: Number of regululators
|
|
* @host_priv: Per-subdevice data, specific for a certain video host device
|
|
*/
|
|
struct v4l2_subdev_platform_data {
|
|
struct regulator_bulk_data *regulators;
|
|
int num_regulators;
|
|
|
|
void *host_priv;
|
|
};
|
|
|
|
/**
|
|
* struct v4l2_subdev - describes a V4L2 sub-device
|
|
*
|
|
* @entity: pointer to &struct media_entity
|
|
* @list: List of sub-devices
|
|
* @owner: The owner is the same as the driver's &struct device owner.
|
|
* @owner_v4l2_dev: true if the &sd->owner matches the owner of @v4l2_dev->dev
|
|
* owner. Initialized by v4l2_device_register_subdev().
|
|
* @flags: subdev flags. Can be:
|
|
* %V4L2_SUBDEV_FL_IS_I2C - Set this flag if this subdev is a i2c device;
|
|
* %V4L2_SUBDEV_FL_IS_SPI - Set this flag if this subdev is a spi device;
|
|
* %V4L2_SUBDEV_FL_HAS_DEVNODE - Set this flag if this subdev needs a
|
|
* device node;
|
|
* %V4L2_SUBDEV_FL_HAS_EVENTS - Set this flag if this subdev generates
|
|
* events.
|
|
*
|
|
* @v4l2_dev: pointer to struct &v4l2_device
|
|
* @ops: pointer to struct &v4l2_subdev_ops
|
|
* @internal_ops: pointer to struct &v4l2_subdev_internal_ops.
|
|
* Never call these internal ops from within a driver!
|
|
* @ctrl_handler: The control handler of this subdev. May be NULL.
|
|
* @name: Name of the sub-device. Please notice that the name must be unique.
|
|
* @grp_id: can be used to group similar subdevs. Value is driver-specific
|
|
* @dev_priv: pointer to private data
|
|
* @host_priv: pointer to private data used by the device where the subdev
|
|
* is attached.
|
|
* @devnode: subdev device node
|
|
* @dev: pointer to the physical device, if any
|
|
* @fwnode: The fwnode_handle of the subdev, usually the same as
|
|
* either dev->of_node->fwnode or dev->fwnode (whichever is non-NULL).
|
|
* @async_list: Links this subdev to a global subdev_list or @notifier->done
|
|
* list.
|
|
* @asd: Pointer to respective &struct v4l2_async_subdev.
|
|
* @notifier: Pointer to the managing notifier.
|
|
* @subdev_notifier: A sub-device notifier implicitly registered for the sub-
|
|
* device using v4l2_device_register_sensor_subdev().
|
|
* @pdata: common part of subdevice platform data
|
|
*
|
|
* Each instance of a subdev driver should create this struct, either
|
|
* stand-alone or embedded in a larger struct.
|
|
*
|
|
* This structure should be initialized by v4l2_subdev_init() or one of
|
|
* its variants: v4l2_spi_subdev_init(), v4l2_i2c_subdev_init().
|
|
*/
|
|
struct v4l2_subdev {
|
|
#if defined(CONFIG_MEDIA_CONTROLLER)
|
|
struct media_entity entity;
|
|
#endif
|
|
struct list_head list;
|
|
struct module *owner;
|
|
bool owner_v4l2_dev;
|
|
u32 flags;
|
|
struct v4l2_device *v4l2_dev;
|
|
const struct v4l2_subdev_ops *ops;
|
|
const struct v4l2_subdev_internal_ops *internal_ops;
|
|
struct v4l2_ctrl_handler *ctrl_handler;
|
|
char name[V4L2_SUBDEV_NAME_SIZE];
|
|
u32 grp_id;
|
|
void *dev_priv;
|
|
void *host_priv;
|
|
struct video_device *devnode;
|
|
struct device *dev;
|
|
struct fwnode_handle *fwnode;
|
|
struct list_head async_list;
|
|
struct v4l2_async_subdev *asd;
|
|
struct v4l2_async_notifier *notifier;
|
|
struct v4l2_async_notifier *subdev_notifier;
|
|
struct v4l2_subdev_platform_data *pdata;
|
|
};
|
|
|
|
|
|
/**
|
|
* media_entity_to_v4l2_subdev - Returns a &struct v4l2_subdev from
|
|
* the &struct media_entity embedded in it.
|
|
*
|
|
* @ent: pointer to &struct media_entity.
|
|
*/
|
|
#define media_entity_to_v4l2_subdev(ent) \
|
|
({ \
|
|
typeof(ent) __me_sd_ent = (ent); \
|
|
\
|
|
__me_sd_ent ? \
|
|
container_of(__me_sd_ent, struct v4l2_subdev, entity) : \
|
|
NULL; \
|
|
})
|
|
|
|
/**
|
|
* vdev_to_v4l2_subdev - Returns a &struct v4l2_subdev from
|
|
* the &struct video_device embedded on it.
|
|
*
|
|
* @vdev: pointer to &struct video_device
|
|
*/
|
|
#define vdev_to_v4l2_subdev(vdev) \
|
|
((struct v4l2_subdev *)video_get_drvdata(vdev))
|
|
|
|
/**
|
|
* struct v4l2_subdev_fh - Used for storing subdev information per file handle
|
|
*
|
|
* @vfh: pointer to &struct v4l2_fh
|
|
* @pad: pointer to &struct v4l2_subdev_pad_config
|
|
*/
|
|
struct v4l2_subdev_fh {
|
|
struct v4l2_fh vfh;
|
|
#if defined(CONFIG_VIDEO_V4L2_SUBDEV_API)
|
|
struct v4l2_subdev_pad_config *pad;
|
|
#endif
|
|
};
|
|
|
|
/**
|
|
* to_v4l2_subdev_fh - Returns a &struct v4l2_subdev_fh from
|
|
* the &struct v4l2_fh embedded on it.
|
|
*
|
|
* @fh: pointer to &struct v4l2_fh
|
|
*/
|
|
#define to_v4l2_subdev_fh(fh) \
|
|
container_of(fh, struct v4l2_subdev_fh, vfh)
|
|
|
|
#if defined(CONFIG_VIDEO_V4L2_SUBDEV_API)
|
|
|
|
/**
|
|
* v4l2_subdev_get_try_format - ancillary routine to call
|
|
* &struct v4l2_subdev_pad_config->try_fmt
|
|
*
|
|
* @sd: pointer to &struct v4l2_subdev
|
|
* @cfg: pointer to &struct v4l2_subdev_pad_config array.
|
|
* @pad: index of the pad in the @cfg array.
|
|
*/
|
|
static inline struct v4l2_mbus_framefmt
|
|
*v4l2_subdev_get_try_format(struct v4l2_subdev *sd,
|
|
struct v4l2_subdev_pad_config *cfg,
|
|
unsigned int pad)
|
|
{
|
|
if (WARN_ON(pad >= sd->entity.num_pads))
|
|
pad = 0;
|
|
return &cfg[pad].try_fmt;
|
|
}
|
|
|
|
/**
|
|
* v4l2_subdev_get_try_crop - ancillary routine to call
|
|
* &struct v4l2_subdev_pad_config->try_crop
|
|
*
|
|
* @sd: pointer to &struct v4l2_subdev
|
|
* @cfg: pointer to &struct v4l2_subdev_pad_config array.
|
|
* @pad: index of the pad in the @cfg array.
|
|
*/
|
|
static inline struct v4l2_rect
|
|
*v4l2_subdev_get_try_crop(struct v4l2_subdev *sd,
|
|
struct v4l2_subdev_pad_config *cfg,
|
|
unsigned int pad)
|
|
{
|
|
if (WARN_ON(pad >= sd->entity.num_pads))
|
|
pad = 0;
|
|
return &cfg[pad].try_crop;
|
|
}
|
|
|
|
/**
|
|
* v4l2_subdev_get_try_crop - ancillary routine to call
|
|
* &struct v4l2_subdev_pad_config->try_compose
|
|
*
|
|
* @sd: pointer to &struct v4l2_subdev
|
|
* @cfg: pointer to &struct v4l2_subdev_pad_config array.
|
|
* @pad: index of the pad in the @cfg array.
|
|
*/
|
|
static inline struct v4l2_rect
|
|
*v4l2_subdev_get_try_compose(struct v4l2_subdev *sd,
|
|
struct v4l2_subdev_pad_config *cfg,
|
|
unsigned int pad)
|
|
{
|
|
if (WARN_ON(pad >= sd->entity.num_pads))
|
|
pad = 0;
|
|
return &cfg[pad].try_compose;
|
|
}
|
|
#endif
|
|
|
|
extern const struct v4l2_file_operations v4l2_subdev_fops;
|
|
|
|
/**
|
|
* v4l2_set_subdevdata - Sets V4L2 dev private device data
|
|
*
|
|
* @sd: pointer to &struct v4l2_subdev
|
|
* @p: pointer to the private device data to be stored.
|
|
*/
|
|
static inline void v4l2_set_subdevdata(struct v4l2_subdev *sd, void *p)
|
|
{
|
|
sd->dev_priv = p;
|
|
}
|
|
|
|
/**
|
|
* v4l2_get_subdevdata - Gets V4L2 dev private device data
|
|
*
|
|
* @sd: pointer to &struct v4l2_subdev
|
|
*
|
|
* Returns the pointer to the private device data to be stored.
|
|
*/
|
|
static inline void *v4l2_get_subdevdata(const struct v4l2_subdev *sd)
|
|
{
|
|
return sd->dev_priv;
|
|
}
|
|
|
|
/**
|
|
* v4l2_set_subdev_hostdata - Sets V4L2 dev private host data
|
|
*
|
|
* @sd: pointer to &struct v4l2_subdev
|
|
* @p: pointer to the private data to be stored.
|
|
*/
|
|
static inline void v4l2_set_subdev_hostdata(struct v4l2_subdev *sd, void *p)
|
|
{
|
|
sd->host_priv = p;
|
|
}
|
|
|
|
/**
|
|
* v4l2_get_subdev_hostdata - Gets V4L2 dev private data
|
|
*
|
|
* @sd: pointer to &struct v4l2_subdev
|
|
*
|
|
* Returns the pointer to the private host data to be stored.
|
|
*/
|
|
static inline void *v4l2_get_subdev_hostdata(const struct v4l2_subdev *sd)
|
|
{
|
|
return sd->host_priv;
|
|
}
|
|
|
|
#ifdef CONFIG_MEDIA_CONTROLLER
|
|
|
|
/**
|
|
* v4l2_subdev_link_validate_default - validates a media link
|
|
*
|
|
* @sd: pointer to &struct v4l2_subdev
|
|
* @link: pointer to &struct media_link
|
|
* @source_fmt: pointer to &struct v4l2_subdev_format
|
|
* @sink_fmt: pointer to &struct v4l2_subdev_format
|
|
*
|
|
* This function ensures that width, height and the media bus pixel
|
|
* code are equal on both source and sink of the link.
|
|
*/
|
|
int v4l2_subdev_link_validate_default(struct v4l2_subdev *sd,
|
|
struct media_link *link,
|
|
struct v4l2_subdev_format *source_fmt,
|
|
struct v4l2_subdev_format *sink_fmt);
|
|
|
|
/**
|
|
* v4l2_subdev_link_validate - validates a media link
|
|
*
|
|
* @link: pointer to &struct media_link
|
|
*
|
|
* This function calls the subdev's link_validate ops to validate
|
|
* if a media link is valid for streaming. It also internally
|
|
* calls v4l2_subdev_link_validate_default() to ensure that
|
|
* width, height and the media bus pixel code are equal on both
|
|
* source and sink of the link.
|
|
*/
|
|
int v4l2_subdev_link_validate(struct media_link *link);
|
|
|
|
/**
|
|
* v4l2_subdev_alloc_pad_config - Allocates memory for pad config
|
|
*
|
|
* @sd: pointer to struct v4l2_subdev
|
|
*/
|
|
struct
|
|
v4l2_subdev_pad_config *v4l2_subdev_alloc_pad_config(struct v4l2_subdev *sd);
|
|
|
|
/**
|
|
* v4l2_subdev_free_pad_config - Frees memory allocated by
|
|
* v4l2_subdev_alloc_pad_config().
|
|
*
|
|
* @cfg: pointer to &struct v4l2_subdev_pad_config
|
|
*/
|
|
void v4l2_subdev_free_pad_config(struct v4l2_subdev_pad_config *cfg);
|
|
#endif /* CONFIG_MEDIA_CONTROLLER */
|
|
|
|
/**
|
|
* v4l2_subdev_init - initializes the sub-device struct
|
|
*
|
|
* @sd: pointer to the &struct v4l2_subdev to be initialized
|
|
* @ops: pointer to &struct v4l2_subdev_ops.
|
|
*/
|
|
void v4l2_subdev_init(struct v4l2_subdev *sd,
|
|
const struct v4l2_subdev_ops *ops);
|
|
|
|
/**
|
|
* v4l2_subdev_call - call an operation of a v4l2_subdev.
|
|
*
|
|
* @sd: pointer to the &struct v4l2_subdev
|
|
* @o: name of the element at &struct v4l2_subdev_ops that contains @f.
|
|
* Each element there groups a set of callbacks functions.
|
|
* @f: callback function that will be called if @cond matches.
|
|
* The callback functions are defined in groups, according to
|
|
* each element at &struct v4l2_subdev_ops.
|
|
* @args...: arguments for @f.
|
|
*
|
|
* Example: err = v4l2_subdev_call(sd, video, s_std, norm);
|
|
*/
|
|
#define v4l2_subdev_call(sd, o, f, args...) \
|
|
({ \
|
|
int __result; \
|
|
if (!(sd)) \
|
|
__result = -ENODEV; \
|
|
else if (!((sd)->ops->o && (sd)->ops->o->f)) \
|
|
__result = -ENOIOCTLCMD; \
|
|
else \
|
|
__result = (sd)->ops->o->f((sd), ##args); \
|
|
__result; \
|
|
})
|
|
|
|
/**
|
|
* v4l2_subdev_has_op - Checks if a subdev defines a certain operation.
|
|
*
|
|
* @sd: pointer to the &struct v4l2_subdev
|
|
* @o: The group of callback functions in &struct v4l2_subdev_ops
|
|
* which @f is a part of.
|
|
* @f: callback function to be checked for its existence.
|
|
*/
|
|
#define v4l2_subdev_has_op(sd, o, f) \
|
|
((sd)->ops->o && (sd)->ops->o->f)
|
|
|
|
/**
|
|
* v4l2_subdev_notify_event() - Delivers event notification for subdevice
|
|
* @sd: The subdev for which to deliver the event
|
|
* @ev: The event to deliver
|
|
*
|
|
* Will deliver the specified event to all userspace event listeners which are
|
|
* subscribed to the v42l subdev event queue as well as to the bridge driver
|
|
* using the notify callback. The notification type for the notify callback
|
|
* will be %V4L2_DEVICE_NOTIFY_EVENT.
|
|
*/
|
|
void v4l2_subdev_notify_event(struct v4l2_subdev *sd,
|
|
const struct v4l2_event *ev);
|
|
|
|
#endif
|