前言
1. 調試平臺： 全志V5/T7等有BT1120的並行接口，理論有DVP接口的一般都支持
2. NVP6134可使用多路視頻同時輸入
硬件連接
模擬camera1
模擬camera2
模擬camera3
模擬camera4 NVP6134 ------>NVCSI0
V5/T7
模擬camera5
模擬camera6
模擬camera7
模擬camera8 NVP6134 ------>NVCSI1
配置調試環境
1. 配置CSI 2/3 GPIO 配置
不管使用BT656還是BT1120輸入，都是這套GPIO配置
【BT1120使用16位信號輸入】
[vind0/csi2]
csi2_used = 1
csi2_pck = port:PE00<2><default><default><default>
csi2_hsync = port:PE02<2><default><default><default>
csi2_vsync = port:PE03<2><default><default><default>
csi2_d0 = port:PE04<2><default><default><default>
csi2_d1 = port:PE05<2><default><default><default>
csi2_d2 = port:PE06<2><default><default><default>
csi2_d3 = port:PE07<2><default><default><default>
csi2_d4 = port:PE08<2><default><default><default>
csi2_d5 = port:PE09<2><default><default><default>
csi2_d6 = port:PE10<2><default><default><default>
csi2_d7 = port:PE11<2><default><default><default>
csi2_d8 = port:PE12<2><default><default><default>
csi2_d9 = port:PE13<2><default><default><default>
csi2_d10 = port:PE14<2><default><default><default>
csi2_d11 = port:PE15<2><default><default><default>
csi2_d12 = port:PI07<2><default><default><default>
csi2_d13 = port:PI08<2><default><default><default>
csi2_d14 = port:PI09<2><default><default><default>
csi2_d15 = port:PI10<2><default><default><default>
[vind0/csi3]
csi3_used = 1
csi3_pck = port:PJ00<2><default><default><default>
csi3_hsync = port:PJ02<2><default><default><default>
csi3_vsync = port:PJ03<2><default><default><default>
csi3_d0 = port:PJ04<2><default><default><default>
csi3_d1 = port:PJ05<2><default><default><default>
csi3_d2 = port:PJ06<2><default><default><default>
csi3_d3 = port:PJ07<2><default><default><default>
csi3_d4 = port:PJ08<2><default><default><default>
csi3_d5 = port:PJ09<2><default><default><default>
csi3_d6 = port:PJ10<2><default><default><default>
csi3_d7 = port:PJ11<2><default><default><default>
csi3_d8 = port:PJ12<2><default><default><default>
csi3_d9 = port:PJ13<2><default><default><default>
csi3_d10 = port:PJ14<2><default><default><default>
csi3_d11 = port:PJ15<2><default><default><default>
csi3_d12 = port:PI13<2><default><default><default>
csi3_d13 = port:PI14<2><default><default><default>
csi3_d14 = port:PI15<2><default><default><default>
csi3_d15 = port:PI16<2><default><default><default>
2.添加驅動
obj-m += nvp6134/
obj-m += nvp6134_2/
一個nvp6134驅動可以支持一個PARSER四通道
3. 加載驅動
insmod /lib/modules/4.4.55/videobuf2-dma-contig.ko
insmod /lib/modules/4.4.55/vin_io.ko
insmod /lib/modules/4.4.55/nvp6134.ko
insmod /lib/modules/4.4.55/nvp6134_2.ko
insmod /lib/modules/4.4.55/vin_v4l2.ko
BT1120 四通道+八路輸入
實現原理：
a.每個NVP6134通過四路模擬camera交織輸入, 兩個NVP6134即8路camera
b. 在主控端對四路camera交織輸入進行解交織
c. V5/T7有兩個ISP，每個ISP有四個子通道，即8個通道；
每個解交織後的單路camera數據通過ISP的子通道輸入
1.通道設置
（1）配置6134內部四通道mode
（2）配置mbus
static int sensor_g_mbus_config(struct v4l2_subdev *sd,
struct v4l2_mbus_config *cfg)
{
cfg->type = V4L2_MBUS_BT656;
cfg->flags = CLK_POL | CSI_CH_0 | CSI_CH_1 | CSI_CH_2 | CSI_CH_3;
return 0;
}
2.格式設置
YUV的格式順序並不影響圖像採集，只是影響圖像色彩；
所以不太確定YUV順序的話，可以先把圖像通路調通後，再根據圖像色彩校準YUV順序
static struct sensor_format_struct sensor_formats[] = {
{
.desc = "BT656 4CH",
.mbus_code = MEDIA_BUS_FMT_VYUY8_1X16,
.regs = NULL,
.regs_size = 0,
.bpp = 2,
},
3. sysconfig配置
（1）配置sensor
主要是id、I2C ID、isp配置、pmu供電配置、reset管腳；
注意： 由於是ISP 需要bypss，所以需要將isp_used關閉
[vind0/sensor0]
sensor0_used = 1
sensor0_mname = "nvp6134"
sensor0_twi_cci_id = 2
sensor0_twi_addr = 0x60
sensor0_mclk_id = 0
sensor0_pos = "front"
sensor0_isp_used = 0
sensor0_fmt = 0
sensor0_stby_mode = 0
sensor0_vflip = 0
sensor0_hflip = 0
sensor0_iovdd = "iovdd-csi"
sensor0_iovdd_vol = 2800000
sensor0_avdd = ""
sensor0_avdd_vol = 2800000
sensor0_dvdd = ""
sensor0_dvdd_vol = 1800000
sensor0_power_en =
sensor0_reset = port:PI1<1><0><1><0>
sensor0_pwdn = port:PI3<1><0><1><0>
[vind0/sensor1]
sensor1_used = 1
sensor1_mname = "nvp6134_2"
sensor1_twi_cci_id = 3
sensor1_twi_addr = 0x60
sensor1_mclk_id = 1
sensor1_pos = "rear"
sensor1_isp_used = 0
sensor1_fmt = 0
sensor1_stby_mode = 0
sensor1_vflip = 0
sensor1_hflip = 0
sensor1_iovdd = "iovdd-csi"
sensor1_iovdd_vol = 2800000
sensor1_avdd = ""
sensor1_avdd_vol = 2800000
sensor1_dvdd = ""
sensor1_dvdd_vol = 1800000
sensor1_power_en =
sensor1_reset = port:PI2<1><0><1><0>
sensor1_pwdn = port:PI4<1><0><1><0>
（2）配置pipeline
這裏只列舉了兩組pipeline；
csi_sel 需要和實際使用的NVCSI id匹配上；
isp_sel 需要和實際使用的ISP id匹配上 （V5和T7平臺都有兩個ISP）；
isp_tx_ch 這個是ISP的子通道，因爲NVP6134的交織圖像需要ISP做解交織；
[vind0/vinc0]
vinc0_used = 1
vinc0_csi_sel = 2
vinc0_mipi_sel = 0xff
vinc0_isp_sel = 0
vinc0_isp_tx_ch = 0
vinc0_rear_sensor_sel = 0
vinc0_front_sensor_sel = 0
vinc0_sensor_list = 0
[vind0/vinc1]
vinc1_used = 1
vinc1_csi_sel = 2
vinc1_mipi_sel = 0xff
vinc1_isp_sel = 0
vinc1_isp_tx_ch = 1
vinc1_rear_sensor_sel = 0
vinc1_front_sensor_sel = 0
vinc1_sensor_list = 0
[vind0/vinc2]
vinc2_used = 1
vinc2_csi_sel = 2
vinc2_mipi_sel = 0xff
vinc2_isp_sel = 0
vinc2_isp_tx_ch = 2
vinc2_rear_sensor_sel = 0
vinc2_front_sensor_sel = 0
vinc2_sensor_list = 0
[vind0/vinc3]
vinc3_used = 1
vinc3_csi_sel = 2
vinc3_mipi_sel = 0xff
vinc3_isp_sel = 0
vinc3_isp_tx_ch = 3
vinc3_rear_sensor_sel = 0
vinc3_front_sensor_sel = 0
vinc3_sensor_list = 0
[vind0/vinc4]
vinc4_used = 1
vinc4_csi_sel = 3
vinc4_mipi_sel = 0xff
vinc4_isp_sel = 2
vinc4_isp_tx_ch = 0
vinc4_rear_sensor_sel = 1
vinc4_front_sensor_sel = 1
vinc4_sensor_list = 0
[vind0/vinc5]
vinc5_used = 1
vinc5_csi_sel = 3
vinc5_mipi_sel = 0xff
vinc5_isp_sel = 2
vinc5_isp_tx_ch = 1
vinc5_rear_sensor_sel = 1
vinc5_front_sensor_sel = 1
vinc5_sensor_list = 0
[vind0/vinc6]
vinc6_used = 1
vinc6_csi_sel = 3
vinc6_mipi_sel = 0xff
vinc6_isp_sel = 2
vinc6_isp_tx_ch = 2
vinc6_rear_sensor_sel = 1
vinc6_front_sensor_sel = 1
vinc6_sensor_list = 0
[vind0/vinc7]
vinc7_used = 1
vinc7_csi_sel = 3
vinc7_mipi_sel = 0xff
vinc7_isp_sel = 2
vinc7_isp_tx_ch = 3
vinc7_rear_sensor_sel = 1
vinc7_front_sensor_sel = 1
vinc7_sensor_list = 0