조회 : 4,180
Amritpreet Singh93I will have only 1 driver to control the FPGA over SPI. Even if i make it a V4L2 subdevice based driver, how can i use it for multiple input ports
You will have to write one driver that should be able to register three v4l2 sub-device.
You can subscribe to linux-media mailing and also watch #v4l IRC channel and may get plenty of help there for your specific need.
Amritpreet Singh93And what should i add to device tree?
Device tree entry should like below -
&spi1 {
status = "okay";
clock-frequency =
fpga_spi_drv@XX {
compatible = "xxxxxx";
reg =
reset-gpios = <&xx>;
oscen-gpios = <&yy>;
powerdown-gpios = <& >;
bufen-gpios = <&>;
camen-gpios = <&>;
port1 {
cam1: endpoint {
remote-endpoint = <&vin4a>;
hsync-active = <1>;
vsync-active = <1>;
pclk-sample = <0>;
input-clock-freq =
pixel-clock-freq =
};
};
Port2 {
Cam2: endpoint {
remote-endpoint = <&vin5a>;
hsync-active = <1>;
vsync-active = <1>;
pclk-sample = <0>;
input-clock-freq =
pixel-clock-freq =
};
};
Port3 {
Cam3: endpoint {
remote-endpoint = <&vin6a>;
hsync-active = <1>;
vsync-active = <1>;
pclk-sample = <0>;
input-clock-freq =
pixel-clock-freq =
};
};
};
&vin4a {
status = "okay";
endpoint {
slave-mode;
remote-endpoint = <&cam1>;
};
};
&vin5a {
status = "okay";
endpoint {
slave-mode;
remote-endpoint = <&cam2>;
};
};
&vin6a {
status = "okay";
endpoint {
slave-mode;
remote-endpoint = <&cam3>;
};
};
&vip2 {
status = "okay";
};
&vip3 {
status = "okay";
};
