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/* SPDX-License-Identifier: GPL-2.0 */
/*
* Imagination E5010 JPEG Encoder driver.
*
* Copyright (C) 2023 Texas Instruments Incorporated - https://www.ti.com/
*
* Author: David Huang <d-huang@ti.com>
* Author: Devarsh Thakkar <devarsht@ti.com>
*/
#include <media/v4l2-ctrls.h>
#include <media/v4l2-device.h>
#include <media/v4l2-fh.h>
#ifndef _E5010_JPEG_ENC_H
#define _E5010_JPEG_ENC_H
#define MAX_PLANES 2
#define HEADER_SIZE 0x025D
#define MIN_DIMENSION 64
#define MAX_DIMENSION 8192
#define DEFAULT_WIDTH 640
#define DEFAULT_HEIGHT 480
#define E5010_MODULE_NAME "e5010"
#define JPEG_MAX_BYTES_PER_PIXEL 2
/* JPEG marker definitions */
#define START_OF_IMAGE 0xFFD8
#define SOF_BASELINE_DCT 0xFFC0
#define END_OF_IMAGE 0xFFD9
#define START_OF_SCAN 0xFFDA
/* Definitions for the huffman table specification in the Marker segment */
#define DHT_MARKER 0xFFC4
#define LH_DC 0x001F
#define LH_AC 0x00B5
/* Definitions for the quantization table specification in the Marker segment */
#define DQT_MARKER 0xFFDB
#define ACMAX 0x03FF
#define DCMAX 0x07FF
/* Length and precision of the quantization table parameters */
#define LQPQ 0x00430
#define QMAX 255
/* Misc JPEG header definitions */
#define UC_NUM_COMP 3
#define PRECISION 8
#define HORZ_SAMPLING_FACTOR (2 << 4)
#define VERT_SAMPLING_FACTOR_422 1
#define VERT_SAMPLING_FACTOR_420 2
#define COMPONENTS_IN_SCAN 3
#define PELS_IN_BLOCK 64
/* Used for Qp table generation */
#define LUMINOSITY 10
#define CONTRAST 1
#define INCREASE 2
#define QP_TABLE_SIZE (8 * 8)
#define QP_TABLE_FIELD_OFFSET 0x04
/*
* vb2 queue structure
* contains queue data information
*
* @fmt: format info
* @width: frame width
* @height: frame height
* @bytesperline: bytes per line in memory
* @size_image: image size in memory
*/
struct e5010_q_data {
struct e5010_fmt *fmt;
u32 width;
u32 height;
u32 width_adjusted;
u32 height_adjusted;
u32 sizeimage[MAX_PLANES];
u32 bytesperline[MAX_PLANES];
u32 sequence;
struct v4l2_rect crop;
bool crop_set;
};
/*
* Driver device structure
* Holds all memory handles and global parameters
* Shared by all instances
*/
struct e5010_dev {
struct device *dev;
struct v4l2_device v4l2_dev;
struct v4l2_m2m_dev *m2m_dev;
struct video_device *vdev;
void __iomem *core_base;
void __iomem *mmu_base;
struct clk *clk;
struct e5010_context *last_context_run;
/* Protect access to device data */
struct mutex mutex;
/* Protect access to hardware*/
spinlock_t hw_lock;
};
/*
* Driver context structure
* One of these exists for every m2m context
* Holds context specific data
*/
struct e5010_context {
struct v4l2_fh fh;
struct e5010_dev *e5010;
struct e5010_q_data out_queue;
struct e5010_q_data cap_queue;
int quality;
bool update_qp;
struct v4l2_ctrl_handler ctrl_handler;
u8 luma_qp[QP_TABLE_SIZE];
u8 chroma_qp[QP_TABLE_SIZE];
};
/*
* Buffer structure
* Contains info for all buffers
*/
struct e5010_buffer {
struct v4l2_m2m_buffer buffer;
};
enum {
CHROMA_ORDER_CB_CR = 0, //UV ordering
CHROMA_ORDER_CR_CB = 1, //VU ordering
};
enum {
SUBSAMPLING_420 = 1,
SUBSAMPLING_422 = 2,
};
/*
* e5010 format structure
* contains format information
*/
struct e5010_fmt {
u32 fourcc;
unsigned int num_planes;
unsigned int type;
u32 subsampling;
u32 chroma_order;
const struct v4l2_frmsize_stepwise frmsize;
};
/*
* struct e5010_ctrl - contains info for each supported v4l2 control
*/
struct e5010_ctrl {
unsigned int cid;
enum v4l2_ctrl_type type;
unsigned char name[32];
int minimum;
int maximum;
int step;
int default_value;
unsigned char compound;
};
#endif
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