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