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1177 lines
43 KiB
1177 lines
43 KiB
/* 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 <[email protected]> |
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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_flags - 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. |
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* |
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* @query_dv_timings: callback for VIDIOC_QUERY_DV_TIMINGS() ioctl handler code. |
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* |
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* @s_rx_buffer: set a host allocated memory buffer for the subdev. The subdev |
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* can adjust @size to a lower value and must not write more data to the |
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* buffer starting at @data than the original value of @size. |
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*/ |
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struct v4l2_subdev_video_ops { |
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int (*s_routing)(struct v4l2_subdev *sd, u32 input, u32 output, u32 config); |
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int (*s_crystal_freq)(struct v4l2_subdev *sd, u32 freq, u32 flags); |
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int (*g_std)(struct v4l2_subdev *sd, v4l2_std_id *norm); |
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int (*s_std)(struct v4l2_subdev *sd, v4l2_std_id norm); |
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int (*s_std_output)(struct v4l2_subdev *sd, v4l2_std_id std); |
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int (*g_std_output)(struct v4l2_subdev *sd, v4l2_std_id *std); |
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int (*querystd)(struct v4l2_subdev *sd, v4l2_std_id *std); |
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int (*g_tvnorms)(struct v4l2_subdev *sd, v4l2_std_id *std); |
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int (*g_tvnorms_output)(struct v4l2_subdev *sd, v4l2_std_id *std); |
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int (*g_input_status)(struct v4l2_subdev *sd, u32 *status); |
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int (*s_stream)(struct v4l2_subdev *sd, int enable); |
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int (*g_pixelaspect)(struct v4l2_subdev *sd, struct v4l2_fract *aspect); |
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int (*g_frame_interval)(struct v4l2_subdev *sd, |
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struct v4l2_subdev_frame_interval *interval); |
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int (*s_frame_interval)(struct v4l2_subdev *sd, |
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struct v4l2_subdev_frame_interval *interval); |
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int (*s_dv_timings)(struct v4l2_subdev *sd, |
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struct v4l2_dv_timings *timings); |
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int (*g_dv_timings)(struct v4l2_subdev *sd, |
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struct v4l2_dv_timings *timings); |
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int (*query_dv_timings)(struct v4l2_subdev *sd, |
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struct v4l2_dv_timings *timings); |
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int (*s_rx_buffer)(struct v4l2_subdev *sd, void *buf, |
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unsigned int *size); |
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}; |
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/** |
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* struct v4l2_subdev_vbi_ops - Callbacks used when v4l device was opened |
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* in video mode via the vbi device node. |
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* |
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* @decode_vbi_line: video decoders that support sliced VBI need to implement |
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* this ioctl. Field p of the &struct v4l2_decode_vbi_line is set to the |
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* start of the VBI data that was generated by the decoder. The driver |
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* 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 IR receiver. |
|
* @rx_s_parameters: Set the current operating parameters and state of |
|
* 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 IR transmitter. |
|
* @tx_s_parameters: Set the current operating parameters and state of |
|
* 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. |
|
* |
|
* @get_mbus_config: get the media bus configuration of a remote sub-device. |
|
* The media bus configuration is usually retrieved from the |
|
* firmware interface at sub-device probe time, immediately |
|
* applied to the hardware and eventually adjusted by the |
|
* driver. Remote sub-devices (usually video receivers) shall |
|
* use this operation to query the transmitting end bus |
|
* configuration in order to adjust their own one accordingly. |
|
* Callers should make sure they get the most up-to-date as |
|
* possible configuration from the remote end, likely calling |
|
* this operation as close as possible to stream on time. The |
|
* operation shall fail if the pad index it has been called on |
|
* is not valid or in case of unrecoverable failures. |
|
* |
|
* @set_mbus_config: set the media bus configuration of a remote sub-device. |
|
* This operations is intended to allow, in combination with |
|
* the get_mbus_config operation, the negotiation of media bus |
|
* configuration parameters between media sub-devices. The |
|
* operation shall not fail if the requested configuration is |
|
* not supported, but the driver shall update the content of |
|
* the %config argument to reflect what has been actually |
|
* applied to the hardware. The operation shall fail if the |
|
* pad index it has been called on is not valid or in case of |
|
* unrecoverable failures. |
|
*/ |
|
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); |
|
int (*get_mbus_config)(struct v4l2_subdev *sd, unsigned int pad, |
|
struct v4l2_mbus_config *config); |
|
int (*set_mbus_config)(struct v4l2_subdev *sd, unsigned int pad, |
|
struct v4l2_mbus_config *config); |
|
}; |
|
|
|
/** |
|
* 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_compose - 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_get_fwnode_pad_1_to_1 - Get pad number from a subdev fwnode |
|
* endpoint, assuming 1:1 port:pad |
|
* |
|
* @entity: Pointer to the subdev entity |
|
* @endpoint: Pointer to a parsed fwnode endpoint |
|
* |
|
* This function can be used as the .get_fwnode_pad operation for |
|
* subdevices that map port numbers and pad indexes 1:1. If the endpoint |
|
* is owned by the subdevice, the function returns the endpoint port |
|
* number. |
|
* |
|
* Returns the endpoint port number on success or a negative error code. |
|
*/ |
|
int v4l2_subdev_get_fwnode_pad_1_to_1(struct media_entity *entity, |
|
struct fwnode_endpoint *endpoint); |
|
|
|
/** |
|
* 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 to be called. |
|
* 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
|
|
|