郑州网站建站模板,综合门户网站建设,网上购物平台哪个最正规,福建企业网站建设NVP6158简介 NVP6158C是一款4通道通用RX#xff0c;提供高质量图像的芯片。它接受来自摄像机和其他视频信号的独立4通道通用输入来源。它将4通道通用1M至8M 7.5P视频格式数字化并解码为代表8位ITU-R BT.656/1120 4:2:2格式的数字分量视频#xff0c;并将单独的BT.601格式与27…NVP6158简介 NVP6158C是一款4通道通用RX提供高质量图像的芯片。它接受来自摄像机和其他视频信号的独立4通道通用输入来源。它将4通道通用1M至8M 7.5P视频格式数字化并解码为代表8位ITU-R BT.656/1120 4:2:2格式的数字分量视频并将单独的BT.601格式与27/36/37.125MHz同步54/72/74.25MHz和108/144/148.5/297MHz多路复用。54/72/74.25/108/144/148.5/297MHz复用功能可用因为它在时钟范围内锁相环NVP6158C包括4通道模拟处理电路包括抗混叠滤波器、ADC、钳位和均衡器滤波器。采用自适应高性能梳状滤波器和垂直峰值滤波器获得了最佳的图像质量。它还支持可编程的饱和度、色调、亮度、对比度以及CTI、可编程峰值滤波器和各种补偿滤波器等多种功能。 RK DVP简介 DVPDigital Video Port 是传统的sensor输出接口采用并行输出方式d数据位宽有8bit、10bit、12bit、16bit是CMOS电平信号重点是非差分信号PCLK最大速率为96MHz接口如下图 PCLKpixel clock ,像素时钟每个时钟对应一个像素数据 HSYNChorizonal synchronization行同步信号 VSYNCvertical synchronization帧同步信号 DATA像素数据视频数据具体位宽要看ISP是否支持 XCLK或者MCLKISP芯片输出给驱动sensor的时钟 SCLSDAIIC用来读写sensor的寄存器配置sensor。 NVP6158 与 RK3568 DVP连接相关原理图 设备树配置 rkcif { status okay; memory-region cif_reserved; }; rkcif_dvp { status okay; ports { #address-cells 1; #size-cells 0;port0 { #address-cells 1; #size-cells 0; /* Parallel bus endpoint */ dvp_in_bcam1: endpoint1 { reg 1; remote-endpoint nvp6158_out; bus-width 16; }; }; }; }; nvp6158: nvp615830 { compatible nvp6158-v4l2; status okay;reg 0x30; clocks cru CLK_CIF_OUT; clock-names xvclk; power-domains power RK3568_PD_VI; pinctrl-names default; pinctrl-0 cif_clk cif_dvp_clk cif_dvp_bus16; //pinctrl-0 cif_dvp_clk cif_dvp_bus8 cif_dvp_bus16;pwr-gpios gpio0 RK_PC4 GPIO_ACTIVE_HIGH; //pwr2-gpios gpio4 RK_PC7 GPIO_ACTIVE_HIGH;/* 360 camera */ rst-gpios gpio4 RK_PA6 GPIO_ACTIVE_HIGH; /*rst2-gpios gpio2 RK_PC5 GPIO_ACTIVE_HIGH;*/ /*pwdn-gpios gpio4 RK_PA6 GPIO_ACTIVE_HIGH;*/ /*pwdn2-gpios gpio4 RK_PA6 GPIO_ACTIVE_HIGH;*/ rockchip,camera-module-index 0; rockchip,camera-module-facing back; rockchip,camera-module-name default; rockchip,camera-module-lens-name default; rockchip,dvp_mode BT1120; //BT656 or BT1120 or BT656_TEST rockchip,channel_nums 4; //channel nums, 1/2/4 rockchip,dual_edge 0; // pclk dual edge, 0/1 rockchip,default_rect 1920 1080; // default resolution port {nvp6158_out: endpoint { remote-endpoint dvp_in_bcam1; }; }; }; clocks cru CLK_CIF_OUT; //走GPIO CIF时钟 配置为是27M clock-names xvclk; nvp6158-xvclk devm_clk_get(dev, xvclk);if (IS_ERR(nvp6158-xvclk)) {dev_err(dev, Failed to get xvclk\n);return -EINVAL;}if (ret 0) {#define NVP6158_XVCLK_FREQ 27000000ret clk_set_rate(nvp6158-xvclk, NVP6158_XVCLK_FREQ);dev_err(dev, Failed to set xvclk rate (24MHz)\n);return ret;} rockchip,dvp_mode BT1120 走BT1120模式 rockchip,channel_nums 4;//并口的数据lane 只有一条lane 可配置1 参数1/2/4 rockchip,default_rect 1280 720;摄像头分辨率。 rkcif会从nvp6158驱动里获取 rockchip,dual_edge pclk的边沿有效 一般用于配置分辨率 720p0 1080P1 如下 rkcif 会获取对应的pclk dual_edge static int nvp6158_g_mbus_config(struct v4l2_subdev *sd,struct v4l2_mbus_config *cfg) {struct nvp6158 *nvp6158 to_nvp6158(sd);cfg-type V4L2_MBUS_BT656;if (nvp6158-dual_edge 1) {cfg-flags RKMODULE_CAMERA_BT656_CHANNELS |V4L2_MBUS_PCLK_SAMPLE_RISING |V4L2_MBUS_PCLK_SAMPLE_FALLING;} else {cfg-flags RKMODULE_CAMERA_BT656_CHANNELS |V4L2_MBUS_PCLK_SAMPLE_RISING;}return 0; } nvp6158关注的代码 初始化热拔插工作队列 INIT_DELAYED_WORK(nvp6158-plug_state_check.d_work, nvp6158_plug_state_check_work);nvp6158-plug_state_check.state_check_wq create_singlethread_workqueue(nvp6158_work_queue);if (nvp6158-plug_state_check.state_check_wq NULL) {dev_err(dev, %s(%d): %s create failed.\n, __func__, __LINE__,nvp6158_work_queue);} 热拔插队列打开DVP摄像头后 nvp6158_no_signal 读取nvp6158 0xa8地址判断摄像头有无接入 #ifdef WORK_QUEUE static void nvp6158_plug_state_check_work(struct work_struct *work) {struct sensor_state_check_work *params_check container_of(work, struct sensor_state_check_work, d_work.work);struct nvp6158 *nvp6158 container_of(params_check, struct nvp6158, plug_state_check);struct i2c_client *client nvp6158-client;struct v4l2_subdev *sd nvp6158-subdev;u8 novid_status 0x00;u8 sync_status 0x00;nvp6158_no_signal(sd, novid_status);nvp6158_sync(sd, sync_status);nvp6158-cur_detect_status novid_status;/* detect state change to determine is there has plug motion */novid_status nvp6158-cur_detect_status ^ nvp6158-last_detect_status;if (novid_status)nvp6158-hot_plug true;elsenvp6158-hot_plug false;nvp6158-last_detect_status nvp6158-cur_detect_status;dev_info(client-dev, %s has plug motion? (%s), __func__,nvp6158-hot_plug ? true : false);if (nvp6158-hot_plug) {dev_info(client-dev, queue_delayed_work 1500ms, if has hot plug motion.);queue_delayed_work(nvp6158-plug_state_check.state_check_wq,nvp6158-plug_state_check.d_work, msecs_to_jiffies(1500));nvp6158_write(client, 0xFF, 0x20);nvp6158_write(client, 0x00, (sync_status 4) | sync_status);usleep_range(3000, 5000);nvp6158_write(client, 0x00, 0xFF);} else {dev_info(client-dev, queue_delayed_work 100ms, if no hot plug motion.);queue_delayed_work(nvp6158-plug_state_check.state_check_wq,nvp6158-plug_state_check.d_work, msecs_to_jiffies(100));} } #endif 调试 I2C无法读取写入 1.确认电源电压 2.确认时钟脚有无27M CLK信号 3.排查是否其他器件影响 无图像1.确认时钟脚有无27M CLK信号 2.确认下发的分辨率与接入的摄像头是否对应得上