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![Xin Ji](/assets/img/avatar_default.png)
As V4L2_FWNODE_BUS_TYPE_PARALLEL is not used for DPI interface, this patch add V4L2_FWNODE_BUS_TYPE_DPI for video DPI interface. Signed-off-by: Xin Ji <xji@analogixsemi.com> Reviewed-by: Robert Foss <robert.foss@linaro.org> Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com> Signed-off-by: Mauro Carvalho Chehab <mchehab@kernel.org>
488 lines
18 KiB
C
488 lines
18 KiB
C
/* SPDX-License-Identifier: GPL-2.0-only */
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/*
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* V4L2 fwnode binding parsing library
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*
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* Copyright (c) 2016 Intel Corporation.
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* Author: Sakari Ailus <sakari.ailus@linux.intel.com>
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*
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* Copyright (C) 2012 - 2013 Samsung Electronics Co., Ltd.
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* Author: Sylwester Nawrocki <s.nawrocki@samsung.com>
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*
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* Copyright (C) 2012 Renesas Electronics Corp.
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* Author: Guennadi Liakhovetski <g.liakhovetski@gmx.de>
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*/
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#ifndef _V4L2_FWNODE_H
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#define _V4L2_FWNODE_H
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#include <linux/errno.h>
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#include <linux/fwnode.h>
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#include <linux/list.h>
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#include <linux/types.h>
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#include <media/v4l2-mediabus.h>
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struct fwnode_handle;
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struct v4l2_async_notifier;
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struct v4l2_async_subdev;
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/**
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* struct v4l2_fwnode_endpoint - the endpoint data structure
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* @base: fwnode endpoint of the v4l2_fwnode
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* @bus_type: bus type
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* @bus: bus configuration data structure
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* @bus.parallel: embedded &struct v4l2_mbus_config_parallel.
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* Used if the bus is parallel.
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* @bus.mipi_csi1: embedded &struct v4l2_mbus_config_mipi_csi1.
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* Used if the bus is MIPI Alliance's Camera Serial
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* Interface version 1 (MIPI CSI1) or Standard
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* Mobile Imaging Architecture's Compact Camera Port 2
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* (SMIA CCP2).
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* @bus.mipi_csi2: embedded &struct v4l2_mbus_config_mipi_csi2.
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* Used if the bus is MIPI Alliance's Camera Serial
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* Interface version 2 (MIPI CSI2).
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* @link_frequencies: array of supported link frequencies
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* @nr_of_link_frequencies: number of elements in link_frequenccies array
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*/
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struct v4l2_fwnode_endpoint {
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struct fwnode_endpoint base;
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/*
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* Fields below this line will be zeroed by
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* v4l2_fwnode_endpoint_parse()
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*/
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enum v4l2_mbus_type bus_type;
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struct {
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struct v4l2_mbus_config_parallel parallel;
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struct v4l2_mbus_config_mipi_csi1 mipi_csi1;
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struct v4l2_mbus_config_mipi_csi2 mipi_csi2;
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} bus;
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u64 *link_frequencies;
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unsigned int nr_of_link_frequencies;
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};
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/**
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* V4L2_FWNODE_PROPERTY_UNSET - identify a non initialized property
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*
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* All properties in &struct v4l2_fwnode_device_properties are initialized
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* to this value.
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*/
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#define V4L2_FWNODE_PROPERTY_UNSET (-1U)
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/**
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* enum v4l2_fwnode_orientation - possible device orientation
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* @V4L2_FWNODE_ORIENTATION_FRONT: device installed on the front side
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* @V4L2_FWNODE_ORIENTATION_BACK: device installed on the back side
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* @V4L2_FWNODE_ORIENTATION_EXTERNAL: device externally located
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*/
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enum v4l2_fwnode_orientation {
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V4L2_FWNODE_ORIENTATION_FRONT,
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V4L2_FWNODE_ORIENTATION_BACK,
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V4L2_FWNODE_ORIENTATION_EXTERNAL
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};
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/**
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* struct v4l2_fwnode_device_properties - fwnode device properties
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* @orientation: device orientation. See &enum v4l2_fwnode_orientation
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* @rotation: device rotation
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*/
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struct v4l2_fwnode_device_properties {
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enum v4l2_fwnode_orientation orientation;
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unsigned int rotation;
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};
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/**
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* struct v4l2_fwnode_link - a link between two endpoints
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* @local_node: pointer to device_node of this endpoint
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* @local_port: identifier of the port this endpoint belongs to
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* @local_id: identifier of the id this endpoint belongs to
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* @remote_node: pointer to device_node of the remote endpoint
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* @remote_port: identifier of the port the remote endpoint belongs to
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* @remote_id: identifier of the id the remote endpoint belongs to
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*/
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struct v4l2_fwnode_link {
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struct fwnode_handle *local_node;
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unsigned int local_port;
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unsigned int local_id;
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struct fwnode_handle *remote_node;
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unsigned int remote_port;
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unsigned int remote_id;
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};
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/**
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* enum v4l2_connector_type - connector type
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* @V4L2_CONN_UNKNOWN: unknown connector type, no V4L2 connector configuration
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* @V4L2_CONN_COMPOSITE: analog composite connector
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* @V4L2_CONN_SVIDEO: analog svideo connector
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*/
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enum v4l2_connector_type {
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V4L2_CONN_UNKNOWN,
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V4L2_CONN_COMPOSITE,
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V4L2_CONN_SVIDEO,
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};
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/**
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* struct v4l2_connector_link - connector link data structure
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* @head: structure to be used to add the link to the
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* &struct v4l2_fwnode_connector
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* @fwnode_link: &struct v4l2_fwnode_link link between the connector and the
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* device the connector belongs to.
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*/
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struct v4l2_connector_link {
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struct list_head head;
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struct v4l2_fwnode_link fwnode_link;
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};
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/**
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* struct v4l2_fwnode_connector_analog - analog connector data structure
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* @sdtv_stds: sdtv standards this connector supports, set to V4L2_STD_ALL
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* if no restrictions are specified.
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*/
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struct v4l2_fwnode_connector_analog {
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v4l2_std_id sdtv_stds;
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};
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/**
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* struct v4l2_fwnode_connector - the connector data structure
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* @name: the connector device name
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* @label: optional connector label
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* @type: connector type
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* @links: list of all connector &struct v4l2_connector_link links
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* @nr_of_links: total number of links
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* @connector: connector configuration
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* @connector.analog: analog connector configuration
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* &struct v4l2_fwnode_connector_analog
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*/
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struct v4l2_fwnode_connector {
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const char *name;
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const char *label;
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enum v4l2_connector_type type;
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struct list_head links;
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unsigned int nr_of_links;
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union {
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struct v4l2_fwnode_connector_analog analog;
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/* future connectors */
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} connector;
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};
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/**
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* enum v4l2_fwnode_bus_type - Video bus types defined by firmware properties
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* @V4L2_FWNODE_BUS_TYPE_GUESS: Default value if no bus-type fwnode property
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* @V4L2_FWNODE_BUS_TYPE_CSI2_CPHY: MIPI CSI-2 bus, C-PHY physical layer
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* @V4L2_FWNODE_BUS_TYPE_CSI1: MIPI CSI-1 bus
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* @V4L2_FWNODE_BUS_TYPE_CCP2: SMIA Compact Camera Port 2 bus
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* @V4L2_FWNODE_BUS_TYPE_CSI2_DPHY: MIPI CSI-2 bus, D-PHY physical layer
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* @V4L2_FWNODE_BUS_TYPE_PARALLEL: Camera Parallel Interface bus
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* @V4L2_FWNODE_BUS_TYPE_BT656: BT.656 video format bus-type
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* @V4L2_FWNODE_BUS_TYPE_DPI: Video Parallel Interface bus
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* @NR_OF_V4L2_FWNODE_BUS_TYPE: Number of bus-types
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*/
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enum v4l2_fwnode_bus_type {
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V4L2_FWNODE_BUS_TYPE_GUESS = 0,
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V4L2_FWNODE_BUS_TYPE_CSI2_CPHY,
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V4L2_FWNODE_BUS_TYPE_CSI1,
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V4L2_FWNODE_BUS_TYPE_CCP2,
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V4L2_FWNODE_BUS_TYPE_CSI2_DPHY,
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V4L2_FWNODE_BUS_TYPE_PARALLEL,
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V4L2_FWNODE_BUS_TYPE_BT656,
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V4L2_FWNODE_BUS_TYPE_DPI,
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NR_OF_V4L2_FWNODE_BUS_TYPE
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};
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/**
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* v4l2_fwnode_endpoint_parse() - parse all fwnode node properties
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* @fwnode: pointer to the endpoint's fwnode handle
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* @vep: pointer to the V4L2 fwnode data structure
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*
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* This function parses the V4L2 fwnode endpoint specific parameters from the
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* firmware. There are two ways to use this function, either by letting it
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* obtain the type of the bus (by setting the @vep.bus_type field to
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* V4L2_MBUS_UNKNOWN) or specifying the bus type explicitly to one of the &enum
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* v4l2_mbus_type types.
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*
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* When @vep.bus_type is V4L2_MBUS_UNKNOWN, the function will use the "bus-type"
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* property to determine the type when it is available. The caller is
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* responsible for validating the contents of @vep.bus_type field after the call
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* returns.
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*
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* As a deprecated functionality to support older DT bindings without "bus-type"
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* property for devices that support multiple types, if the "bus-type" property
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* does not exist, the function will attempt to guess the type based on the
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* endpoint properties available. NEVER RELY ON GUESSING THE BUS TYPE IN NEW
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* DRIVERS OR BINDINGS.
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*
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* It is also possible to set @vep.bus_type corresponding to an actual bus. In
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* this case the function will only attempt to parse properties related to this
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* bus, and it will return an error if the value of the "bus-type" property
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* corresponds to a different bus.
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*
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* The caller is required to initialise all fields of @vep, either with
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* explicitly values, or by zeroing them.
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*
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* The function does not change the V4L2 fwnode endpoint state if it fails.
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*
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* NOTE: This function does not parse "link-frequencies" property as its size is
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* not known in advance. Please use v4l2_fwnode_endpoint_alloc_parse() if you
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* need properties of variable size.
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*
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* Return: %0 on success or a negative error code on failure:
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* %-ENOMEM on memory allocation failure
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* %-EINVAL on parsing failure
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* %-ENXIO on mismatching bus types
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*/
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int v4l2_fwnode_endpoint_parse(struct fwnode_handle *fwnode,
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struct v4l2_fwnode_endpoint *vep);
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/**
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* v4l2_fwnode_endpoint_free() - free the V4L2 fwnode acquired by
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* v4l2_fwnode_endpoint_alloc_parse()
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* @vep: the V4L2 fwnode the resources of which are to be released
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*
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* It is safe to call this function with NULL argument or on a V4L2 fwnode the
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* parsing of which failed.
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*/
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void v4l2_fwnode_endpoint_free(struct v4l2_fwnode_endpoint *vep);
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/**
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* v4l2_fwnode_endpoint_alloc_parse() - parse all fwnode node properties
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* @fwnode: pointer to the endpoint's fwnode handle
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* @vep: pointer to the V4L2 fwnode data structure
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*
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* This function parses the V4L2 fwnode endpoint specific parameters from the
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* firmware. There are two ways to use this function, either by letting it
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* obtain the type of the bus (by setting the @vep.bus_type field to
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* V4L2_MBUS_UNKNOWN) or specifying the bus type explicitly to one of the &enum
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* v4l2_mbus_type types.
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*
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* When @vep.bus_type is V4L2_MBUS_UNKNOWN, the function will use the "bus-type"
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* property to determine the type when it is available. The caller is
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* responsible for validating the contents of @vep.bus_type field after the call
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* returns.
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*
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* As a deprecated functionality to support older DT bindings without "bus-type"
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* property for devices that support multiple types, if the "bus-type" property
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* does not exist, the function will attempt to guess the type based on the
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* endpoint properties available. NEVER RELY ON GUESSING THE BUS TYPE IN NEW
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* DRIVERS OR BINDINGS.
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*
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* It is also possible to set @vep.bus_type corresponding to an actual bus. In
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* this case the function will only attempt to parse properties related to this
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* bus, and it will return an error if the value of the "bus-type" property
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* corresponds to a different bus.
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*
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* The caller is required to initialise all fields of @vep, either with
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* explicitly values, or by zeroing them.
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*
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* The function does not change the V4L2 fwnode endpoint state if it fails.
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*
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* v4l2_fwnode_endpoint_alloc_parse() has two important differences to
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* v4l2_fwnode_endpoint_parse():
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*
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* 1. It also parses variable size data.
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*
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* 2. The memory it has allocated to store the variable size data must be freed
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* using v4l2_fwnode_endpoint_free() when no longer needed.
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*
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* Return: %0 on success or a negative error code on failure:
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* %-ENOMEM on memory allocation failure
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* %-EINVAL on parsing failure
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* %-ENXIO on mismatching bus types
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*/
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int v4l2_fwnode_endpoint_alloc_parse(struct fwnode_handle *fwnode,
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struct v4l2_fwnode_endpoint *vep);
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/**
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* v4l2_fwnode_parse_link() - parse a link between two endpoints
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* @fwnode: pointer to the endpoint's fwnode at the local end of the link
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* @link: pointer to the V4L2 fwnode link data structure
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*
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* Fill the link structure with the local and remote nodes and port numbers.
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* The local_node and remote_node fields are set to point to the local and
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* remote port's parent nodes respectively (the port parent node being the
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* parent node of the port node if that node isn't a 'ports' node, or the
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* grand-parent node of the port node otherwise).
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*
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* A reference is taken to both the local and remote nodes, the caller must use
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* v4l2_fwnode_put_link() to drop the references when done with the
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* link.
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*
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* Return: 0 on success, or -ENOLINK if the remote endpoint fwnode can't be
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* found.
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*/
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int v4l2_fwnode_parse_link(struct fwnode_handle *fwnode,
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struct v4l2_fwnode_link *link);
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/**
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* v4l2_fwnode_put_link() - drop references to nodes in a link
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* @link: pointer to the V4L2 fwnode link data structure
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*
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* Drop references to the local and remote nodes in the link. This function
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* must be called on every link parsed with v4l2_fwnode_parse_link().
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*/
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void v4l2_fwnode_put_link(struct v4l2_fwnode_link *link);
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/**
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* v4l2_fwnode_connector_free() - free the V4L2 connector acquired memory
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* @connector: the V4L2 connector resources of which are to be released
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*
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* Free all allocated memory and put all links acquired by
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* v4l2_fwnode_connector_parse() and v4l2_fwnode_connector_add_link().
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*
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* It is safe to call this function with NULL argument or on a V4L2 connector
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* the parsing of which failed.
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*/
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void v4l2_fwnode_connector_free(struct v4l2_fwnode_connector *connector);
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/**
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* v4l2_fwnode_connector_parse() - initialize the 'struct v4l2_fwnode_connector'
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* @fwnode: pointer to the subdev endpoint's fwnode handle where the connector
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* is connected to or to the connector endpoint fwnode handle.
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* @connector: pointer to the V4L2 fwnode connector data structure
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*
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* Fill the &struct v4l2_fwnode_connector with the connector type, label and
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* all &enum v4l2_connector_type specific connector data. The label is optional
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* so it is set to %NULL if no one was found. The function initialize the links
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* to zero. Adding links to the connector is done by calling
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* v4l2_fwnode_connector_add_link().
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*
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* The memory allocated for the label must be freed when no longer needed.
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* Freeing the memory is done by v4l2_fwnode_connector_free().
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*
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* Return:
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* * %0 on success or a negative error code on failure:
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* * %-EINVAL if @fwnode is invalid
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* * %-ENOTCONN if connector type is unknown or connector device can't be found
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*/
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int v4l2_fwnode_connector_parse(struct fwnode_handle *fwnode,
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struct v4l2_fwnode_connector *connector);
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/**
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* v4l2_fwnode_connector_add_link - add a link between a connector node and
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* a v4l2-subdev node.
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* @fwnode: pointer to the subdev endpoint's fwnode handle where the connector
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* is connected to
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* @connector: pointer to the V4L2 fwnode connector data structure
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*
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* Add a new &struct v4l2_connector_link link to the
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* &struct v4l2_fwnode_connector connector links list. The link local_node
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* points to the connector node, the remote_node to the host v4l2 (sub)dev.
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*
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* The taken references to remote_node and local_node must be dropped and the
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* allocated memory must be freed when no longer needed. Both is done by calling
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* v4l2_fwnode_connector_free().
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*
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* Return:
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* * %0 on success or a negative error code on failure:
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* * %-EINVAL if @fwnode or @connector is invalid or @connector type is unknown
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* * %-ENOMEM on link memory allocation failure
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* * %-ENOTCONN if remote connector device can't be found
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* * %-ENOLINK if link parsing between v4l2 (sub)dev and connector fails
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*/
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int v4l2_fwnode_connector_add_link(struct fwnode_handle *fwnode,
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struct v4l2_fwnode_connector *connector);
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/**
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* v4l2_fwnode_device_parse() - parse fwnode device properties
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* @dev: pointer to &struct device
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* @props: pointer to &struct v4l2_fwnode_device_properties where to store the
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* parsed properties values
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*
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* This function parses and validates the V4L2 fwnode device properties from the
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* firmware interface, and fills the @struct v4l2_fwnode_device_properties
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* provided by the caller.
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*
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* Return:
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* % 0 on success
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* %-EINVAL if a parsed property value is not valid
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*/
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int v4l2_fwnode_device_parse(struct device *dev,
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struct v4l2_fwnode_device_properties *props);
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/**
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* typedef parse_endpoint_func - Driver's callback function to be called on
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* each V4L2 fwnode endpoint.
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*
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* @dev: pointer to &struct device
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* @vep: pointer to &struct v4l2_fwnode_endpoint
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* @asd: pointer to &struct v4l2_async_subdev
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*
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* Return:
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* * %0 on success
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* * %-ENOTCONN if the endpoint is to be skipped but this
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* should not be considered as an error
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* * %-EINVAL if the endpoint configuration is invalid
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*/
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typedef int (*parse_endpoint_func)(struct device *dev,
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struct v4l2_fwnode_endpoint *vep,
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struct v4l2_async_subdev *asd);
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/**
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* v4l2_async_nf_parse_fwnode_endpoints - Parse V4L2 fwnode endpoints in a
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* device node
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* @dev: the device the endpoints of which are to be parsed
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* @notifier: notifier for @dev
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* @asd_struct_size: size of the driver's async sub-device struct, including
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* sizeof(struct v4l2_async_subdev). The &struct
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* v4l2_async_subdev shall be the first member of
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* the driver's async sub-device struct, i.e. both
|
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* begin at the same memory address.
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* @parse_endpoint: Driver's callback function called on each V4L2 fwnode
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* endpoint. Optional.
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*
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* DEPRECATED! This function is deprecated. Don't use it in new drivers.
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* Instead see an example in cio2_parse_firmware() function in
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* drivers/media/pci/intel/ipu3/ipu3-cio2.c .
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*
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* Parse the fwnode endpoints of the @dev device and populate the async sub-
|
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* devices list in the notifier. The @parse_endpoint callback function is
|
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* called for each endpoint with the corresponding async sub-device pointer to
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* let the caller initialize the driver-specific part of the async sub-device
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* structure.
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|
*
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* The notifier memory shall be zeroed before this function is called on the
|
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* notifier.
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*
|
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* This function may not be called on a registered notifier and may be called on
|
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* a notifier only once.
|
|
*
|
|
* The &struct v4l2_fwnode_endpoint passed to the callback function
|
|
* @parse_endpoint is released once the function is finished. If there is a need
|
|
* to retain that configuration, the user needs to allocate memory for it.
|
|
*
|
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* Any notifier populated using this function must be released with a call to
|
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* v4l2_async_nf_cleanup() after it has been unregistered and the async
|
|
* sub-devices are no longer in use, even if the function returned an error.
|
|
*
|
|
* Return: %0 on success, including when no async sub-devices are found
|
|
* %-ENOMEM if memory allocation failed
|
|
* %-EINVAL if graph or endpoint parsing failed
|
|
* Other error codes as returned by @parse_endpoint
|
|
*/
|
|
int
|
|
v4l2_async_nf_parse_fwnode_endpoints(struct device *dev,
|
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struct v4l2_async_notifier *notifier,
|
|
size_t asd_struct_size,
|
|
parse_endpoint_func parse_endpoint);
|
|
|
|
/* Helper macros to access the connector links. */
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|
|
|
/** v4l2_connector_last_link - Helper macro to get the first
|
|
* &struct v4l2_fwnode_connector link
|
|
* @v4l2c: &struct v4l2_fwnode_connector owning the connector links
|
|
*
|
|
* This marco returns the first added &struct v4l2_connector_link connector
|
|
* link or @NULL if the connector has no links.
|
|
*/
|
|
#define v4l2_connector_first_link(v4l2c) \
|
|
list_first_entry_or_null(&(v4l2c)->links, \
|
|
struct v4l2_connector_link, head)
|
|
|
|
/** v4l2_connector_last_link - Helper macro to get the last
|
|
* &struct v4l2_fwnode_connector link
|
|
* @v4l2c: &struct v4l2_fwnode_connector owning the connector links
|
|
*
|
|
* This marco returns the last &struct v4l2_connector_link added connector link.
|
|
*/
|
|
#define v4l2_connector_last_link(v4l2c) \
|
|
list_last_entry(&(v4l2c)->links, struct v4l2_connector_link, head)
|
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|
|
#endif /* _V4L2_FWNODE_H */
|