forked from Minki/linux
a8fa55078a
Correctness of format type (try or active) and pad number parameters passed to subdevice operation callbacks is now verified only for IOCTL calls. However, those callbacks are also used by drivers, e.g., V4L2 host interfaces. Since both subdev_do_ioctl() and drivers are using v4l2_subdev_call() macro while calling subdevice operations, move those parameter checks from subdev_do_ioctl() to v4l2_subdev_call() so we can avoid taking care of those checks inside drivers. Define a wrapper function for each operation callback in scope, then gather those wrappers in a static v4l2_subdev_ops structure so the v4l2_subdev_call() macro can find them easy if provided. Signed-off-by: Janusz Krzysztofik <jmkrzyszt@gmail.com> Reviewed-by: Sakari Ailus <sakari.ailus@linux.intel.com> Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl> Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
1142 lines
41 KiB
C
1142 lines
41 KiB
C
/* SPDX-License-Identifier: GPL-2.0-or-later */
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/*
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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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#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 buses
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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
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* stopped.
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*
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* @g_pixelaspect: callback to return the pixelaspect ratio.
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*
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* @g_frame_interval: callback for VIDIOC_SUBDEV_G_FRAME_INTERVAL()
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* ioctl handler code.
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*
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* @s_frame_interval: callback for VIDIOC_SUBDEV_S_FRAME_INTERVAL()
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* ioctl handler code.
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*
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* @s_dv_timings: Set custom dv timings in the sub device. This is used
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* when sub device is capable of setting detailed timing information
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* in the hardware to generate/detect the video signal.
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*
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* @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. Please note that
|
|
* it is possible for @close to be called after @unregistered!
|
|
*
|
|
* @release: called when the last user of the subdev device is gone. This
|
|
* happens after the @unregistered callback and when the last open
|
|
* filehandle to the v4l-subdevX device node was closed. If no device
|
|
* node was created for this sub-device, then the @release callback
|
|
* is called right after the @unregistered callback.
|
|
* The @release callback is typically used to free the memory containing
|
|
* the v4l2_subdev structure. It is almost certainly required for any
|
|
* sub-device that sets the V4L2_SUBDEV_FL_HAS_DEVNODE flag.
|
|
*
|
|
* .. 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);
|
|
void (*release)(struct v4l2_subdev *sd);
|
|
};
|
|
|
|
#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.
|
|
* Note controls can send events, thus drivers exposing controls
|
|
* should set this flag.
|
|
*/
|
|
#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
|
|
* @owner: module pointer to the owner of this file handle
|
|
*/
|
|
struct v4l2_subdev_fh {
|
|
struct v4l2_fh vfh;
|
|
struct module *owner;
|
|
#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);
|
|
|
|
extern const struct v4l2_subdev_ops v4l2_subdev_call_wrappers;
|
|
|
|
/**
|
|
* 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...) \
|
|
({ \
|
|
struct v4l2_subdev *__sd = (sd); \
|
|
int __result; \
|
|
if (!__sd) \
|
|
__result = -ENODEV; \
|
|
else if (!(__sd->ops->o && __sd->ops->o->f)) \
|
|
__result = -ENOIOCTLCMD; \
|
|
else if (v4l2_subdev_call_wrappers.o && \
|
|
v4l2_subdev_call_wrappers.o->f) \
|
|
__result = v4l2_subdev_call_wrappers.o->f( \
|
|
__sd, ##args); \
|
|
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
|