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1/* SPDX-License-Identifier: GPL-2.0+ */
2/*
3 * Copyright (C) 2025 Advanced Micro Devices, Inc.
4 */
5
6#ifndef _ISP4_SUBDEV_H_
7#define _ISP4_SUBDEV_H_
8
9#include <linux/debugfs.h>
10#include <linux/delay.h>
11#include <linux/firmware.h>
12#include <linux/pm_runtime.h>
13#include <linux/types.h>
14#include <linux/uaccess.h>
15#include <media/v4l2-device.h>
16
17#include "isp4_fw_cmd_resp.h"
18#include "isp4_hw_reg.h"
19#include "isp4_interface.h"
20#include "isp4_video.h"
21
22/*
23 * One is for none sensor specific response which is not used now.
24 * Another is for sensor specific response
25 */
26#define ISP4SD_MAX_FW_RESP_STREAM_NUM 2
27
28/* Indicates the ISP status */
29enum isp4sd_status {
30 ISP4SD_STATUS_PWR_OFF,
31 ISP4SD_STATUS_PWR_ON,
32 ISP4SD_STATUS_FW_RUNNING,
33 ISP4SD_STATUS_MAX
34};
35
36/* Indicates sensor and output stream status */
37enum isp4sd_start_status {
38 ISP4SD_START_STATUS_OFF,
39 ISP4SD_START_STATUS_STARTED,
40 ISP4SD_START_STATUS_START_FAIL,
41};
42
43struct isp4sd_img_buf_node {
44 struct list_head node;
45 struct isp4if_img_buf_info buf_info;
46};
47
48/* This is ISP output after processing Bayer raw sensor input */
49struct isp4sd_output_info {
50 enum isp4sd_start_status start_status;
51 u32 image_size;
52};
53
54/*
55 * Struct for sensor info used as ISP input or source.
56 * status: sensor status.
57 * output_info: ISP output after processing the sensor input.
58 * start_stream_cmd_sent: indicates if ISP4FW_CMD_ID_START_STREAM was sent
59 * to firmware.
60 * buf_sent_cnt: number of buffers sent to receive images.
61 */
62struct isp4sd_sensor_info {
63 struct isp4sd_output_info output_info;
64 enum isp4sd_start_status status;
65 bool start_stream_cmd_sent;
66 u32 buf_sent_cnt;
67};
68
69/*
70 * The thread is created by the driver to handle firmware responses which will
71 * be waken up when a firmware-to-driver response interrupt occurs.
72 */
73struct isp4sd_thread_handler {
74 struct task_struct *thread;
75 wait_queue_head_t waitq;
76 bool resp_ready;
77};
78
79struct isp4_subdev_thread_param {
80 u32 idx;
81 struct isp4_subdev *isp_subdev;
82};
83
84struct isp4_subdev {
85 struct v4l2_subdev sdev;
86 struct isp4_interface ispif;
87 struct isp4vid_dev isp_vdev;
88
89 struct media_pad sdev_pad;
90
91 enum isp4sd_status isp_status;
92 /* mutex used to synchronize the operation with firmware */
93 struct mutex ops_mutex;
94
95 struct isp4sd_thread_handler
96 fw_resp_thread[ISP4SD_MAX_FW_RESP_STREAM_NUM];
97
98 u32 host2fw_seq_num;
99
100 struct isp4sd_sensor_info sensor_info;
101
102 /* gpio descriptor */
103 struct gpio_desc *enable_gpio;
104 struct device *dev;
105 void __iomem *mmio;
106 struct isp4_subdev_thread_param
107 isp_resp_para[ISP4SD_MAX_FW_RESP_STREAM_NUM];
108 int irq[ISP4SD_MAX_FW_RESP_STREAM_NUM];
109 bool irq_enabled;
110 /* spin lock to access ISP_SYS_INT0_EN exclusively */
111 spinlock_t irq_lock;
112#ifdef CONFIG_DEBUG_FS
113 bool enable_fw_log;
114 struct dentry *debugfs_dir;
115 char *fw_log_output;
116#endif
117};
118
119int isp4sd_init(struct isp4_subdev *isp_subdev, struct v4l2_device *v4l2_dev,
120 int irq[ISP4SD_MAX_FW_RESP_STREAM_NUM]);
121void isp4sd_deinit(struct isp4_subdev *isp_subdev);
122int isp4sd_ioc_send_img_buf(struct v4l2_subdev *sd,
123 struct isp4if_img_buf_info *buf_info);
124int isp4sd_pwron_and_init(struct v4l2_subdev *sd);
125int isp4sd_pwroff_and_deinit(struct v4l2_subdev *sd);
126
127#endif /* _ISP4_SUBDEV_H_ */