242 lines
7.3 KiB
C
242 lines
7.3 KiB
C
/* SPDX-License-Identifier: GPL-2.0-or-later */
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/*
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* vimc-common.h Virtual Media Controller Driver
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*
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* Copyright (C) 2015-2017 Helen Koike <helen.fornazier@gmail.com>
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*/
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#ifndef _VIMC_COMMON_H_
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#define _VIMC_COMMON_H_
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#include <linux/platform_device.h>
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#include <linux/slab.h>
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#include <media/media-device.h>
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#include <media/v4l2-device.h>
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#define VIMC_PDEV_NAME "vimc"
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/* VIMC-specific controls */
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#define VIMC_CID_VIMC_BASE (0x00f00000 | 0xf000)
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#define VIMC_CID_VIMC_CLASS (0x00f00000 | 1)
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#define VIMC_CID_TEST_PATTERN (VIMC_CID_VIMC_BASE + 0)
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#define VIMC_CID_MEAN_WIN_SIZE (VIMC_CID_VIMC_BASE + 1)
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#define VIMC_CID_OSD_TEXT_MODE (VIMC_CID_VIMC_BASE + 2)
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#define VIMC_FRAME_MAX_WIDTH 4096
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#define VIMC_FRAME_MAX_HEIGHT 2160
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#define VIMC_FRAME_MIN_WIDTH 16
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#define VIMC_FRAME_MIN_HEIGHT 16
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#define VIMC_FRAME_INDEX(lin, col, width, bpp) ((lin * width + col) * bpp)
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/* Source and sink pad checks */
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#define VIMC_IS_SRC(pad) (pad)
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#define VIMC_IS_SINK(pad) (!(pad))
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#define VIMC_PIX_FMT_MAX_CODES 8
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extern unsigned int vimc_allocator;
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enum vimc_allocator_type {
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VIMC_ALLOCATOR_VMALLOC = 0,
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VIMC_ALLOCATOR_DMA_CONTIG = 1,
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};
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/**
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* vimc_colorimetry_clamp - Adjust colorimetry parameters
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*
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* @fmt: the pointer to struct v4l2_pix_format or
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* struct v4l2_mbus_framefmt
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*
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* Entities must check if colorimetry given by the userspace is valid, if not
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* then set them as DEFAULT
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*/
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#define vimc_colorimetry_clamp(fmt) \
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do { \
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if ((fmt)->colorspace == V4L2_COLORSPACE_DEFAULT \
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|| (fmt)->colorspace > V4L2_COLORSPACE_DCI_P3) { \
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(fmt)->colorspace = V4L2_COLORSPACE_DEFAULT; \
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(fmt)->ycbcr_enc = V4L2_YCBCR_ENC_DEFAULT; \
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(fmt)->quantization = V4L2_QUANTIZATION_DEFAULT; \
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(fmt)->xfer_func = V4L2_XFER_FUNC_DEFAULT; \
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} \
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if ((fmt)->ycbcr_enc > V4L2_YCBCR_ENC_SMPTE240M) \
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(fmt)->ycbcr_enc = V4L2_YCBCR_ENC_DEFAULT; \
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if ((fmt)->quantization > V4L2_QUANTIZATION_LIM_RANGE) \
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(fmt)->quantization = V4L2_QUANTIZATION_DEFAULT; \
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if ((fmt)->xfer_func > V4L2_XFER_FUNC_SMPTE2084) \
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(fmt)->xfer_func = V4L2_XFER_FUNC_DEFAULT; \
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} while (0)
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/**
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* struct vimc_pix_map - maps media bus code with v4l2 pixel format
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*
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* @code: media bus format code defined by MEDIA_BUS_FMT_* macros
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* @bpp: number of bytes each pixel occupies
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* @pixelformat: pixel format defined by V4L2_PIX_FMT_* macros
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* @bayer: true if this is a bayer format
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*
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* Struct which matches the MEDIA_BUS_FMT_* codes with the corresponding
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* V4L2_PIX_FMT_* fourcc pixelformat and its bytes per pixel (bpp)
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*/
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struct vimc_pix_map {
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unsigned int code[VIMC_PIX_FMT_MAX_CODES];
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unsigned int bpp;
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u32 pixelformat;
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bool bayer;
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};
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/**
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* struct vimc_ent_device - core struct that represents an entity in the
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* topology
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*
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* @dev: a pointer of the device struct of the driver
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* @ent: the pointer to struct media_entity for the node
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* @process_frame: callback send a frame to that node
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* @vdev_get_format: callback that returns the current format a pad, used
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* only when is_media_entity_v4l2_video_device(ent) returns
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* true
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*
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* Each node of the topology must create a vimc_ent_device struct. Depending on
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* the node it will be of an instance of v4l2_subdev or video_device struct
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* where both contains a struct media_entity.
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* Those structures should embedded the vimc_ent_device struct through
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* v4l2_set_subdevdata() and video_set_drvdata() respectively, allowing the
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* vimc_ent_device struct to be retrieved from the corresponding struct
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* media_entity
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*/
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struct vimc_ent_device {
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struct device *dev;
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struct media_entity *ent;
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void * (*process_frame)(struct vimc_ent_device *ved,
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const void *frame);
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void (*vdev_get_format)(struct vimc_ent_device *ved,
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struct v4l2_pix_format *fmt);
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};
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/**
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* struct vimc_device - main device for vimc driver
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*
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* @pipe_cfg: pointer to the vimc pipeline configuration structure
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* @ent_devs: array of vimc_ent_device pointers
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* @mdev: the associated media_device parent
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* @v4l2_dev: Internal v4l2 parent device
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*/
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struct vimc_device {
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const struct vimc_pipeline_config *pipe_cfg;
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struct vimc_ent_device **ent_devs;
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struct media_device mdev;
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struct v4l2_device v4l2_dev;
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};
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/**
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* struct vimc_ent_type Structure for the callbacks of the entity types
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*
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*
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* @add: initializes and registers
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* vimc entity - called from vimc-core
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* @unregister: unregisters vimc entity - called from vimc-core
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* @release: releases vimc entity - called from the v4l2_dev
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* release callback
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*/
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struct vimc_ent_type {
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struct vimc_ent_device *(*add)(struct vimc_device *vimc,
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const char *vcfg_name);
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void (*unregister)(struct vimc_ent_device *ved);
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void (*release)(struct vimc_ent_device *ved);
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};
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/**
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* struct vimc_ent_config Structure which describes individual
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* configuration for each entity
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*
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* @name: entity name
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* @type: contain the callbacks of this entity type
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*
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*/
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struct vimc_ent_config {
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const char *name;
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struct vimc_ent_type *type;
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};
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/**
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* vimc_is_source - returns true if the entity has only source pads
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*
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* @ent: pointer to &struct media_entity
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*
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*/
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bool vimc_is_source(struct media_entity *ent);
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extern struct vimc_ent_type vimc_sensor_type;
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extern struct vimc_ent_type vimc_debayer_type;
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extern struct vimc_ent_type vimc_scaler_type;
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extern struct vimc_ent_type vimc_capture_type;
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extern struct vimc_ent_type vimc_lens_type;
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/**
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* vimc_pix_map_by_index - get vimc_pix_map struct by its index
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*
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* @i: index of the vimc_pix_map struct in vimc_pix_map_list
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*/
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const struct vimc_pix_map *vimc_pix_map_by_index(unsigned int i);
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/**
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* vimc_mbus_code_by_index - get mbus code by its index
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*
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* @index: index of the mbus code in vimc_pix_map_list
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*
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* Returns 0 if no mbus code is found for the given index.
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*/
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u32 vimc_mbus_code_by_index(unsigned int index);
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/**
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* vimc_pix_map_by_code - get vimc_pix_map struct by media bus code
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*
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* @code: media bus format code defined by MEDIA_BUS_FMT_* macros
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*/
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const struct vimc_pix_map *vimc_pix_map_by_code(u32 code);
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/**
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* vimc_pix_map_by_pixelformat - get vimc_pix_map struct by v4l2 pixel format
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*
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* @pixelformat: pixel format defined by V4L2_PIX_FMT_* macros
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*/
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const struct vimc_pix_map *vimc_pix_map_by_pixelformat(u32 pixelformat);
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/**
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* vimc_ent_sd_register - initialize and register a subdev node
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*
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* @ved: the vimc_ent_device struct to be initialize
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* @sd: the v4l2_subdev struct to be initialize and registered
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* @v4l2_dev: the v4l2 device to register the v4l2_subdev
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* @name: name of the sub-device. Please notice that the name must be
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* unique.
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* @function: media entity function defined by MEDIA_ENT_F_* macros
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* @num_pads: number of pads to initialize
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* @pads: the array of pads of the entity, the caller should set the
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* flags of the pads
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* @sd_ops: pointer to &struct v4l2_subdev_ops.
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*
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* Helper function initialize and register the struct vimc_ent_device and struct
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* v4l2_subdev which represents a subdev node in the topology
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*/
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int vimc_ent_sd_register(struct vimc_ent_device *ved,
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struct v4l2_subdev *sd,
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struct v4l2_device *v4l2_dev,
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const char *const name,
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u32 function,
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u16 num_pads,
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struct media_pad *pads,
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const struct v4l2_subdev_ops *sd_ops);
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/**
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* vimc_vdev_link_validate - validates a media link
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*
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* @link: pointer to &struct media_link
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*
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* This function calls validates if a media link is valid for streaming.
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*/
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int vimc_vdev_link_validate(struct media_link *link);
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#endif
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