// SPDX-License-Identifier: GPL-2.0 /* * Maxim Dual GMSL2/GMSL1 to CSI-2 Deserializer driver * * Copyright (C) 2023 Rockchip Electronics Co., Ltd. * * Author: Cai Wenzhong * * V2.00.00 maxim serdes dual GMSL2/GMSL1 driver framework. * 1. local deserializer support: max96716/max96718 * 2. remote serializer support: max9295/max96715/max96717 * 3. support deserializer and serializer auto adaptive * 4. support deserializer output test pattern * 5. support remote serializer channel management * 6. support remote serializer I2c address mapping * 7. support remote serializer hot plug detection and recovery * * V2.00.01 * 1. MIPI TXPHY add tunnel mode support * 2. MIPI TXPHY mode only support 2x4Lanes and 2x2Lanes * * V3.00.00 * 1. deserializer and serializer are associated through i2c-mux * 2. remote serializer is abstracted as v4l2 subdev * 3. remote camera is bound to remote serializer * * V3.01.00 * 1. fixed remote camera s_stream and s_power api return error. * 2. compatible with kernel v4.19/v5.10/v6.1 * * V3.02.00 * 1. support remote dummy sensor * 2. record the status of the serializer * 3. remote serializer support more chip id * 4. support mode add crop rect dts config * * V3.03.00 * 1. remote sensor Makefile rename module ko * 2. remote sensor rename driver name * * V3.04.00 * 1. fix g_mbus_config flag setting error for ISP * 2. support remote raw sensor s_power and s_stream control by cif * 3. support vicap multi channel to multi ISP mode * * V3.05.00 * 1. unified use __v4l2_ctrl_handler_setup in the xxx_start_stream * 2. support subscribe hot plug detect v4l2 event * * V3.06.00 * 1. support multi-channel information configuration * 2. mode vc initialization when vc-array isn't configured * 3. fix the issue of mutex deadlock during hot plug * * V3.07.00 * 1. v4l2 ioctl add command to support quick stream setting * 2. dev_pm_ops add suspend and resume for system sleep * * V3.08.00 * 1. wait link lock stable when hot plug is detected * 2. link get lock state retry if i2c error * * V3.09.00 * 1. if remote camera not connected, hot plug state check timer working, * fix the issue of mutex deadlock when stream off. * */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include "maxim2c_api.h" #define DRIVER_VERSION KERNEL_VERSION(3, 0x09, 0x00) #define MAXIM2C_NAME "maxim2c" #define MAXIM2C_XVCLK_FREQ 25000000 static const char *const maxim2c_supply_names[MAXIM2C_NUM_SUPPLIES] = { "vcc1v2", "vcc1v8", }; static int maxim2c_check_local_chipid(maxim2c_t *maxim2c) { struct i2c_client *client = maxim2c->client; struct device *dev = &client->dev; int ret = 0, loop = 0; u8 chipid = 0; for (loop = 0; loop < 5; loop++) { if (loop != 0) { dev_info(dev, "check local chipid retry (%d)", loop); msleep(10); } ret = maxim2c_i2c_read_reg(client, MAXIM2C_REG_CHIP_ID, &chipid); if (ret == 0) { if (chipid == maxim2c->chipid) { if (chipid == MAX96716_CHIP_ID) { dev_info(dev, "MAX96716 is Detected\n"); return 0; } if (chipid == MAX96718_CHIP_ID) { dev_info(dev, "MAX96718 is Detected\n"); return 0; } } else { // if chipid is unexpected, retry dev_err(dev, "Unexpected maxim chipid = %02x\n", chipid); } } } dev_err(dev, "maxim check chipid error, ret(%d)\n", ret); return -ENODEV; } static void maxim2c_hot_plug_event_report(maxim2c_t *maxim2c, int data) { struct v4l2_subdev *sd = &maxim2c->subdev; struct device *dev = &maxim2c->client->dev; struct v4l2_event evt_hot_plug = { .type = V4L2_EVENT_HOT_PLUG, .u.data[0] = data, }; dev_dbg(dev, "%s data %d\n", __func__, data); v4l2_event_queue(sd->devnode, &evt_hot_plug); } static irqreturn_t maxim2c_hot_plug_detect_irq_handler(int irq, void *dev_id) { maxim2c_t *maxim2c = dev_id; struct device *dev = &maxim2c->client->dev; int lock_gpio_level = 0; mutex_lock(&maxim2c->mutex); if (maxim2c->streaming == 0) { mutex_unlock(&maxim2c->mutex); return IRQ_HANDLED; } lock_gpio_level = gpiod_get_value_cansleep(maxim2c->lock_gpio); if (lock_gpio_level == 0) { dev_info(dev, "serializer hot plug out\n"); maxim2c->hot_plug_state = MAXIM2C_HOT_PLUG_OUT; } else { dev_info(dev, "serializer hot plug in\n"); maxim2c->hot_plug_state = MAXIM2C_HOT_PLUG_IN; } mutex_unlock(&maxim2c->mutex); queue_delayed_work(maxim2c->hot_plug_work.state_check_wq, &maxim2c->hot_plug_work.state_d_work, msecs_to_jiffies(100)); return IRQ_HANDLED; } static void maxim2c_lock_irq_init(maxim2c_t *maxim2c) { struct device *dev = &maxim2c->client->dev; int ret = 0; if (!IS_ERR(maxim2c->lock_gpio)) { maxim2c->hot_plug_irq = gpiod_to_irq(maxim2c->lock_gpio); if (maxim2c->hot_plug_irq < 0) { dev_err(dev, "failed to get hot plug irq\n"); } else { ret = devm_request_threaded_irq(dev, maxim2c->hot_plug_irq, NULL, maxim2c_hot_plug_detect_irq_handler, IRQF_TRIGGER_FALLING | IRQF_TRIGGER_RISING | IRQF_ONESHOT, "maxim2c_hot_plug", maxim2c); if (ret) { dev_err(dev, "failed to request hot plug irq (%d)\n", ret); maxim2c->hot_plug_irq = -1; } else { disable_irq(maxim2c->hot_plug_irq); } } } } static void maxim2c_hot_plug_state_check_work(struct work_struct *work) { struct maxim2c_hot_plug_work *hot_plug_work = container_of(work, struct maxim2c_hot_plug_work, state_d_work.work); maxim2c_t *maxim2c = container_of(hot_plug_work, struct maxim2c, hot_plug_work); struct device *dev = &maxim2c->client->dev; u8 curr_lock_state = 0, retry_lock_state = 0, last_lock_state = 0, link_lock_change = 0; u8 link_enable_mask = 0, link_id = 0; dev_dbg(dev, "%s\n", __func__); mutex_lock(&maxim2c->mutex); if (maxim2c->streaming == 0) { mutex_unlock(&maxim2c->mutex); return; } link_enable_mask = maxim2c->gmsl_link.link_enable_mask; last_lock_state = maxim2c->link_lock_state; if ((maxim2c->hot_plug_state == MAXIM2C_HOT_PLUG_OUT) && (last_lock_state == link_enable_mask)) { // i2c mux enable: disable all remote channel dev_info(dev, "disable all remote channel\n"); maxim2c_i2c_mux_enable(maxim2c, 0x00); } curr_lock_state = maxim2c_link_get_lock_state(maxim2c, link_enable_mask); // Link lock state maybe detect error when hot plug, first check i2c io status if (curr_lock_state != last_lock_state) { // delay 100ms for link lock stable usleep_range(100000, 110000); retry_lock_state = maxim2c_link_get_lock_state(maxim2c, link_enable_mask); if (retry_lock_state != curr_lock_state) { dev_info(dev, "link lock retry: 0x%02x -> 0x%02x\n", curr_lock_state, retry_lock_state); curr_lock_state = retry_lock_state; } } link_lock_change = (last_lock_state ^ curr_lock_state); if (link_lock_change) { dev_info(dev, "lock state: current = 0x%02x, last = 0x%02x\n", curr_lock_state, last_lock_state); maxim2c_hot_plug_event_report(maxim2c, curr_lock_state); maxim2c->link_lock_state = curr_lock_state; } mutex_unlock(&maxim2c->mutex); if (link_lock_change & MAXIM2C_LINK_MASK_A) { link_id = MAXIM2C_LINK_ID_A; if (curr_lock_state & MAXIM2C_LINK_MASK_A) { dev_info(dev, "Link A plug in\n"); if (maxim2c->hot_plug_irq > 0) disable_irq(maxim2c->hot_plug_irq); // Link A remote device start stream maxim2c_remote_devices_s_stream(maxim2c, MAXIM2C_LINK_MASK_A, 1); if (maxim2c->hot_plug_irq > 0) enable_irq(maxim2c->hot_plug_irq); maxim2c_video_pipe_linkid_enable(maxim2c, link_id, true); } else { dev_info(dev, "Link A plug out\n"); // Link A remote device stop stream maxim2c_remote_devices_s_stream(maxim2c, MAXIM2C_LINK_MASK_A, 0); maxim2c_video_pipe_linkid_enable(maxim2c, link_id, false); } } if (link_lock_change & MAXIM2C_LINK_MASK_B) { link_id = MAXIM2C_LINK_ID_B; if (curr_lock_state & MAXIM2C_LINK_MASK_B) { dev_info(dev, "Link B plug in\n"); if (maxim2c->hot_plug_irq > 0) disable_irq(maxim2c->hot_plug_irq); // Link B remote device start stream maxim2c_remote_devices_s_stream(maxim2c, MAXIM2C_LINK_MASK_B, 1); if (maxim2c->hot_plug_irq > 0) enable_irq(maxim2c->hot_plug_irq); maxim2c_video_pipe_linkid_enable(maxim2c, link_id, true); } else { dev_info(dev, "Link B plug out\n"); // Link B remote device stop stream maxim2c_remote_devices_s_stream(maxim2c, MAXIM2C_LINK_MASK_B, 0); maxim2c_video_pipe_linkid_enable(maxim2c, link_id, false); } } if (curr_lock_state == link_enable_mask) { // i2c mux enable: enable all enabled link for remote control maxim2c_i2c_mux_enable(maxim2c, link_enable_mask); } else { queue_delayed_work(maxim2c->hot_plug_work.state_check_wq, &maxim2c->hot_plug_work.state_d_work, msecs_to_jiffies(200)); } } int maxim2c_hot_plug_detect_work_start(maxim2c_t *maxim2c) { struct device *dev = &maxim2c->client->dev; u8 link_lock_state = 0, link_enable_mask = 0; link_lock_state = maxim2c->link_lock_state; link_enable_mask = maxim2c->gmsl_link.link_enable_mask; if (link_lock_state != link_enable_mask) { dev_info(dev, "%s: link_lock = 0x%02x, link_mask = 0x%02x\n", __func__, link_lock_state, link_enable_mask); maxim2c->hot_plug_state = MAXIM2C_HOT_PLUG_OUT; queue_delayed_work(maxim2c->hot_plug_work.state_check_wq, &maxim2c->hot_plug_work.state_d_work, msecs_to_jiffies(200)); } return 0; } static int maxim2c_lock_state_work_init(maxim2c_t *maxim2c) { struct device *dev = &maxim2c->client->dev; INIT_DELAYED_WORK(&maxim2c->hot_plug_work.state_d_work, maxim2c_hot_plug_state_check_work); maxim2c->hot_plug_work.state_check_wq = create_singlethread_workqueue("maxim2c work queue"); if (maxim2c->hot_plug_work.state_check_wq == NULL) { dev_err(dev, "failed to create hot plug work queue\n"); return -ENOMEM; } return 0; } static int maxim2c_lock_state_work_deinit(maxim2c_t *maxim2c) { if (maxim2c->hot_plug_work.state_check_wq) { cancel_delayed_work_sync(&maxim2c->hot_plug_work.state_d_work); destroy_workqueue(maxim2c->hot_plug_work.state_check_wq); maxim2c->hot_plug_work.state_check_wq = NULL; } return 0; } /* Calculate the delay in us by clock rate and clock cycles */ static inline u32 maxim2c_cal_delay(u32 cycles) { return DIV_ROUND_UP(cycles, MAXIM2C_XVCLK_FREQ / 1000 / 1000); } static int maxim2c_device_power_on(maxim2c_t *maxim2c) { struct device *dev = &maxim2c->client->dev; int ret = 0; ret = regulator_bulk_enable(MAXIM2C_NUM_SUPPLIES, maxim2c->supplies); if (ret < 0) { dev_err(dev, "Failed to enable regulators\n"); return -EINVAL; } ret = regulator_enable(maxim2c->pwdn_regulator); if (ret < 0) { dev_err(dev, "Unable to turn pwdn regulator on\n"); return ret; } return 0; } static void maxim2c_device_power_off(maxim2c_t *maxim2c) { struct device *dev = &maxim2c->client->dev; int ret = 0; ret = regulator_disable(maxim2c->pwdn_regulator); if (ret < 0) dev_warn(dev, "Unable to turn pwdn regulator off\n"); ret = regulator_bulk_disable(MAXIM2C_NUM_SUPPLIES, maxim2c->supplies); if (ret < 0) { dev_warn(dev, "Failed to disable regulators\n"); } } static int maxim2c_runtime_resume(struct device *dev) { #if MAXIM2C_LOCAL_DES_ON_OFF_EN struct i2c_client *client = to_i2c_client(dev); struct v4l2_subdev *sd = i2c_get_clientdata(client); maxim2c_t *maxim2c = v4l2_get_subdevdata(sd); int ret = 0; ret |= maxim2c_device_power_on(maxim2c); return ret; #else return 0; #endif /* MAXIM2C_LOCAL_DES_ON_OFF_EN */ } static int maxim2c_runtime_suspend(struct device *dev) { #if MAXIM2C_LOCAL_DES_ON_OFF_EN struct i2c_client *client = to_i2c_client(dev); struct v4l2_subdev *sd = i2c_get_clientdata(client); maxim2c_t *maxim2c = v4l2_get_subdevdata(sd); int ret = 0; maxim2c_device_power_off(maxim2c); return ret; #else return 0; #endif /* MAXIM2C_LOCAL_DES_ON_OFF_EN */ } static int __maybe_unused maxim2c_resume(struct device *dev) { struct i2c_client *client = to_i2c_client(dev); struct v4l2_subdev *sd = i2c_get_clientdata(client); maxim2c_t *maxim2c = v4l2_get_subdevdata(sd); int ret = 0; dev_info(dev, "maxim2c resume\n"); #if (MAXIM2C_LOCAL_DES_ON_OFF_EN == 0) #if MAXIM2C_TEST_PATTERN ret = maxim2c_pattern_hw_init(maxim2c); if (ret) { dev_err(dev, "test pattern hw init error\n"); return ret; } #else ret = maxim2c_module_hw_init(maxim2c); if (ret) { dev_err(dev, "maxim2c module hw init error\n"); return ret; } #endif /* MAXIM2C_TEST_PATTERN */ #endif /* MAXIM2C_LOCAL_DES_ON_OFF_EN */ return 0; } static int __maybe_unused maxim2c_suspend(struct device *dev) { return 0; } static const struct dev_pm_ops maxim2c_pm_ops = { SET_RUNTIME_PM_OPS( maxim2c_runtime_suspend, maxim2c_runtime_resume, NULL) SET_LATE_SYSTEM_SLEEP_PM_OPS(maxim2c_suspend, maxim2c_resume) }; static void maxim2c_module_data_init(maxim2c_t *maxim2c) { maxim2c_link_data_init(maxim2c); maxim2c_video_pipe_data_init(maxim2c); maxim2c_mipi_txphy_data_init(maxim2c); } static int maxim2c_extra_init_seq_parse(maxim2c_t *maxim2c, struct device_node *node) { struct device *dev = &maxim2c->client->dev; struct device_node *init_seq_node = NULL; struct maxim2c_i2c_init_seq *init_seq = NULL; init_seq_node = of_get_child_by_name(node, "extra-init-sequence"); if (IS_ERR_OR_NULL(init_seq_node)) { dev_dbg(dev, "%pOF no child node extra-init-sequence\n", node); return 0; } if (!of_device_is_available(init_seq_node)) { dev_dbg(dev, "%pOF is disabled\n", init_seq_node); of_node_put(init_seq_node); return 0; } dev_info(dev, "load extra-init-sequence\n"); init_seq = &maxim2c->extra_init_seq; maxim2c_i2c_load_init_seq(dev, init_seq_node, init_seq); of_node_put(init_seq_node); return 0; } static int maxim2c_module_parse_dt(maxim2c_t *maxim2c) { struct device *dev = &maxim2c->client->dev; struct device_node *node = NULL; u32 value = 0; int ret = 0; // maxim serdes local node = of_get_child_by_name(dev->of_node, "serdes-local-device"); if (IS_ERR_OR_NULL(node)) { dev_err(dev, "%pOF has no child node: serdes-local-device\n", dev->of_node); return -ENODEV; } if (!of_device_is_available(node)) { dev_info(dev, "%pOF is disabled\n", node); of_node_put(node); return -ENODEV; } ret = of_property_read_u32(node, "remote-routing-to-isp", &value); if (ret == 0) { dev_info(dev, "remote-routing-to-isp property: %d\n", value); maxim2c->remote_routing_to_isp = value; } /* gmsl link parse dt */ maxim2c_link_parse_dt(maxim2c, node); /* video pipe parse dt */ maxim2c_video_pipe_parse_dt(maxim2c, node); /* mipi txphy parse dt */ maxim2c_mipi_txphy_parse_dt(maxim2c, node); /* extra init seq parse dt */ maxim2c_extra_init_seq_parse(maxim2c, node); of_node_put(node); return 0; } static int maxim2c_run_extra_init_seq(maxim2c_t *maxim2c) { struct i2c_client *client = maxim2c->client; struct device *dev = &client->dev; int ret = 0; ret = maxim2c_i2c_run_init_seq(client, &maxim2c->extra_init_seq); if (ret) { dev_err(dev, "extra init sequence error\n"); return ret; } return 0; } static int maxim2c_module_hw_previnit(maxim2c_t *maxim2c) { struct i2c_client *client = maxim2c->client; int ret = 0; // Disable data transmission through video pipe. ret = maxim2c_i2c_update_reg(client, 0x0002, 0xF0, 0x00); if (ret) return ret; // Video Pipe Y/Z Disable ret = maxim2c_i2c_update_reg(client, 0x0160, BIT(1) | BIT(0), 0); if (ret) return ret; // MIPI CSI output disable. ret = maxim2c_i2c_write_reg(client, 0x0313, 0x00); if (ret) return ret; // MIPI TXPHY standby ret = maxim2c_i2c_update_reg(client, 0x0332, 0xF0, 0x00); if (ret) return ret; return 0; } static int maxim2c_module_hw_postinit(maxim2c_t *maxim2c) { struct i2c_client *client = maxim2c->client; int ret = 0; // video pipe disable all ret |= maxim2c_i2c_write_reg(client, 0x0160, 0); // remote control disable all ret |= maxim2c_link_select_remote_control(maxim2c, 0); // Enable data transmission through video pipe. ret |= maxim2c_i2c_update_reg(client, 0x0002, 0xF0, 0xF0); return ret; } int maxim2c_module_hw_init(maxim2c_t *maxim2c) { struct device *dev = &maxim2c->client->dev; int ret = 0; ret = maxim2c_module_hw_previnit(maxim2c); if (ret) { dev_err(dev, "%s: hw prev init error\n", __func__); return ret; } ret = maxim2c_link_hw_init(maxim2c); if (ret) { dev_err(dev, "%s: hw link init error\n", __func__); return ret; } ret = maxim2c_video_pipe_hw_init(maxim2c); if (ret) { dev_err(dev, "%s: hw pipe init error\n", __func__); return ret; } ret = maxim2c_mipi_txphy_hw_init(maxim2c); if (ret) { dev_err(dev, "%s: hw txphy init error\n", __func__); return ret; } ret = maxim2c_run_extra_init_seq(maxim2c); if (ret) { dev_err(dev, "%s: run extra init seq error\n", __func__); return ret; } ret = maxim2c_module_hw_postinit(maxim2c); if (ret) { dev_err(dev, "%s: hw post init error\n", __func__); return ret; } return 0; } EXPORT_SYMBOL(maxim2c_module_hw_init); static int maxim2c_configure_regulators(maxim2c_t *maxim2c) { unsigned int i; for (i = 0; i < MAXIM2C_NUM_SUPPLIES; i++) maxim2c->supplies[i].supply = maxim2c_supply_names[i]; return devm_regulator_bulk_get(&maxim2c->client->dev, MAXIM2C_NUM_SUPPLIES, maxim2c->supplies); } static int maxim2c_probe(struct i2c_client *client, const struct i2c_device_id *id) { struct device *dev = &client->dev; struct device_node *node = dev->of_node; maxim2c_t *maxim2c = NULL; u32 chip_id; int ret = 0; dev_info(dev, "driver version: %02x.%02x.%02x", DRIVER_VERSION >> 16, (DRIVER_VERSION & 0xff00) >> 8, DRIVER_VERSION & 0x00ff); chip_id = (uintptr_t)of_device_get_match_data(dev); if (chip_id == MAX96716_CHIP_ID) { dev_info(dev, "maxim2c driver for max96716\n"); } else if (chip_id == MAX96718_CHIP_ID) { dev_info(dev, "maxim2c driver for max96718\n"); } else { dev_err(dev, "maxim2c driver unknown chip\n"); return -EINVAL; } maxim2c = devm_kzalloc(dev, sizeof(*maxim2c), GFP_KERNEL); if (!maxim2c) { dev_err(dev, "maxim2c probe no memory error\n"); return -ENOMEM; } maxim2c->client = client; maxim2c->chipid = chip_id; maxim2c->sensor_name = MAXIM2C_NAME; ret = of_property_read_u32(node, RKMODULE_CAMERA_MODULE_INDEX, &maxim2c->module_index); ret |= of_property_read_string(node, RKMODULE_CAMERA_MODULE_FACING, &maxim2c->module_facing); ret |= of_property_read_string(node, RKMODULE_CAMERA_MODULE_NAME, &maxim2c->module_name); ret |= of_property_read_string(node, RKMODULE_CAMERA_LENS_NAME, &maxim2c->len_name); if (ret) { dev_err(dev, "could not get module information!\n"); return -EINVAL; } ret = maxim2c_configure_regulators(maxim2c); if (ret) { dev_err(dev, "Failed to get power regulators\n"); return ret; } maxim2c->pwdn_regulator = devm_regulator_get(dev, "pwdn"); if (IS_ERR(maxim2c->pwdn_regulator)) { if (PTR_ERR(maxim2c->pwdn_regulator) != -EPROBE_DEFER) dev_err(dev, "Unable to get pwdn regulator (%ld)\n", PTR_ERR(maxim2c->pwdn_regulator)); else dev_err(dev, "Get pwdn regulator deferred\n"); ret = PTR_ERR(maxim2c->pwdn_regulator); return ret; } maxim2c->lock_gpio = devm_gpiod_get(dev, "lock", GPIOD_IN); if (IS_ERR(maxim2c->lock_gpio)) dev_warn(dev, "Failed to get lock-gpios\n"); mutex_init(&maxim2c->mutex); ret = maxim2c_device_power_on(maxim2c); if (ret) goto err_destroy_mutex; pm_runtime_set_active(dev); pm_runtime_get_noresume(dev); pm_runtime_enable(dev); ret = maxim2c_check_local_chipid(maxim2c); if (ret) goto err_power_off; /* * client->dev->driver_data = subdev * subdev->dev->driver_data = maxim2c */ ret = maxim2c_v4l2_subdev_init(maxim2c); if (ret) { dev_err(dev, "maxim2c probe v4l2 subdev init error\n"); goto err_power_off; } /* maxim2c test pattern */ #if MAXIM2C_TEST_PATTERN ret = maxim2c_pattern_data_init(maxim2c); if (ret) goto err_power_off; #if (MAXIM2C_LOCAL_DES_ON_OFF_EN == 0) ret = maxim2c_pattern_hw_init(maxim2c); if (ret) goto err_power_off; #endif /* MAXIM2C_LOCAL_DES_ON_OFF_EN */ pm_runtime_set_autosuspend_delay(dev, 1000); pm_runtime_use_autosuspend(dev); pm_runtime_mark_last_busy(dev); pm_runtime_put_autosuspend(dev); return 0; #endif /* MAXIM2C_TEST_PATTERN */ maxim2c_module_data_init(maxim2c); maxim2c_module_parse_dt(maxim2c); #if (MAXIM2C_LOCAL_DES_ON_OFF_EN == 0) ret = maxim2c_module_hw_init(maxim2c); if (ret) goto err_subdev_deinit; #endif /* MAXIM2C_LOCAL_DES_ON_OFF_EN */ ret = maxim2c_i2c_mux_init(maxim2c); if (ret) goto err_subdev_deinit; // i2c mux enable: default disable all remote channel maxim2c_i2c_mux_enable(maxim2c, 0x00); maxim2c_lock_irq_init(maxim2c); maxim2c_lock_state_work_init(maxim2c); pm_runtime_set_autosuspend_delay(dev, 1000); pm_runtime_use_autosuspend(dev); pm_runtime_mark_last_busy(dev); pm_runtime_put_autosuspend(dev); return 0; err_subdev_deinit: maxim2c_v4l2_subdev_deinit(maxim2c); err_power_off: pm_runtime_disable(dev); pm_runtime_put_noidle(dev); maxim2c_device_power_off(maxim2c); err_destroy_mutex: mutex_destroy(&maxim2c->mutex); return ret; } #if KERNEL_VERSION(6, 1, 0) > LINUX_VERSION_CODE static int maxim2c_remove(struct i2c_client *client) #else static void maxim2c_remove(struct i2c_client *client) #endif { struct v4l2_subdev *sd = i2c_get_clientdata(client); maxim2c_t *maxim2c = v4l2_get_subdevdata(sd); maxim2c_lock_state_work_deinit(maxim2c); maxim2c_v4l2_subdev_deinit(maxim2c); maxim2c_i2c_mux_deinit(maxim2c); mutex_destroy(&maxim2c->mutex); pm_runtime_disable(&client->dev); if (!pm_runtime_status_suspended(&client->dev)) maxim2c_device_power_off(maxim2c); pm_runtime_set_suspended(&client->dev); #if KERNEL_VERSION(6, 1, 0) > LINUX_VERSION_CODE return 0; #endif } static const struct of_device_id maxim2c_of_match[] = { { .compatible = "maxim2c,max96716", .data = (const void *)MAX96716_CHIP_ID }, { .compatible = "maxim2c,max96718", .data = (const void *)MAX96718_CHIP_ID }, { /* sentinel */ }, }; MODULE_DEVICE_TABLE(of, maxim2c_of_match); static struct i2c_driver maxim2c_i2c_driver = { .driver = { .name = MAXIM2C_NAME, .pm = &maxim2c_pm_ops, .of_match_table = of_match_ptr(maxim2c_of_match), }, .probe = &maxim2c_probe, .remove = &maxim2c_remove, }; module_i2c_driver(maxim2c_i2c_driver); MODULE_AUTHOR("Cai Wenzhong "); MODULE_DESCRIPTION("Maxim dual gmsl deserializer driver"); MODULE_LICENSE("GPL");