diff options
Diffstat (limited to 'drivers/media/platform/imagination/e5010-jpeg-enc.h')
| -rw-r--r-- | drivers/media/platform/imagination/e5010-jpeg-enc.h | 168 |
1 files changed, 168 insertions, 0 deletions
diff --git a/drivers/media/platform/imagination/e5010-jpeg-enc.h b/drivers/media/platform/imagination/e5010-jpeg-enc.h new file mode 100644 index 000000000000..71f49ead6898 --- /dev/null +++ b/drivers/media/platform/imagination/e5010-jpeg-enc.h @@ -0,0 +1,168 @@ +/* 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 |