Interfacing (DSI, CSI, I2C, etc.) • Re: DSI1to SN65DSI84

Code:

/* * vc4-kms-dsi-ti-sn65dsi84-auo-g156han-overlay.dts * modify by fan in 2024-03-14 *//dts-v1/;/plugin/;#include <dt-bindings/gpio/gpio.h>#include <dt-bindings/pinctrl/bcm2835.h>/ {compatible = "brcm,bcm2835";/* PWM0 function */fragment@0 {target = <&gpio>;__overlay__ {pwm_pins: pwm_pins {brcm,pins = <19>;brcm,function = <BCM2835_FSEL_ALT5>;};   };};fragment@1 {target = <&pwm>;frag1: __overlay__ {pinctrl-names = "default";pinctrl-0 = <&pwm_pins>;assigned-clock-rates = <100000000>;status = "okay";};};fragment@2 {target-path = "/";__overlay__ {//#gpio-cells = <2>;/* Panel backlight through PWM0-1 on GPIO 19 */backlight_lvds: backlight {        status = "okay";compatible = "pwm-backlight";pwms = <&pwm 1 1000000 0>; /* Period of 1000000ns means 1KHz */brightness-levels = <0 1000>;num-interpolated-steps = <1000>;default-brightness-level = <800>;enable-gpios = <&gpio 21 GPIO_ACTIVE_HIGH>;     /* Backlight enable */ };panel: panel {compatible = "panel-lvds";   label = "AUO:G156HAN2.0";   status = "okay";backlight = <&backlight_lvds>;/* Physical dimensions of active area */width-mm = <344>;height-mm = <194>;data-mapping = "vesa-24";panel-timing {/* the hactive and porches in the datasheet are for a single LVDS channel *//* since we use dual LVDS channel, Horizontal paramter and clock must double*/clock-frequency = <141000000>;hactive = <1920>;hsync-len = <64>;hfront-porch = <60>;hback-porch = <60>;vactive = <1080>;vsync-len = <12>;vfront-porch = <12>;vback-porch = <12>;};port {#address-cells = <1>;#size-cells = <0>;port@0 {reg = <0>;dual-lvds-odd-pixels;panel_channel_a: endpoint {remote-endpoint = <&bridge_out_a>;};};port@1 {reg = <1>;dual-lvds-even-pixels;panel_channel_b: endpoint {remote-endpoint = <&bridge_out_b>;};};};};};};fragment@3 {target = <&i2c_csi_dsi>;__overlay__ {#gpio-cells = <2>;#address-cells = <1>;#size-cells = <0>;status = "okay";bridge@2c {compatible = "ti,sn65dsi84";reg = <0x2c>;enable-gpios = <&gpio 0 GPIO_ACTIVE_HIGH>;           status = "okay";        ports {#address-cells = <1>;#size-cells = <0>;port@0 {reg = <0>;bridge_in: endpoint {remote-endpoint = <&dsi_out_port>;              };};port@2 {reg = <2>;bridge_out_a: endpoint {remote-endpoint = <&panel_channel_a>;};};port@3 {reg = <3>;bridge_out_b: endpoint {remote-endpoint = <&panel_channel_b>;};};};};};};fragment@4 {target = <&dsi1>;__overlay__ {#address-cells = <1>;#size-cells = <0>;status = "okay";port {dsi_out_port: endpoint {remote-endpoint = <&bridge_in>;          //try to used 3 lanesdata-lanes = <0 1 2>;};};};};fragment@5 {target = <&i2c0if>;__overlay__ {status = "okay";};};fragment@6 {target = <&i2c0mux>;__overlay__ {status = "okay";};};};

Code:

# Uncomment some or all of these to enable the optional hardware interfaces#dtparam=i2c_arm=on#dtparam=i2s=on#dtparam=spi=on# Enable audio (loads snd_bcm2835)#dtparam=audio=on# Additional overlays and parameters are documented# /boot/firmware/overlays/README# Automatically load overlays for detected cameras#camera_auto_detect=1# Automatically load overlays for detected DSI displays#display_auto_detect=1# Automatically load initramfs files, if foundauto_initramfs=1# Enable DRM VC4 V3D driverdtoverlay=vc4-kms-v3dmax_framebuffers=2# Don't have the firmware create an initial video= setting in cmdline.txt.# Use the kernel's default instead.disable_fw_kms_setup=1# Run in 64-bit modearm_64bit=1# Disable compensation for displays with overscandisable_overscan=1# Run as fast as firmware / board allowsarm_boost=1[cm4]# Enable host mode on the 2711 built-in XHCI USB controller.# This line should be removed if the legacy DWC2 controller is required# (e.g. for USB device mode) or if USB support is not required.otg_mode=1[all]kernel=kernel-6.6.20-auo.imgdtparam=act_led_trigger=heartbeatdtoverlay=i2c-rtc,ds1339dtparam=i2c_arm=ondtoverlay=vc4-kms-dsi-ti-sn65dsi84-auo-g156han