arch/arm/boot/dts/overlays/vc4-kms-dsi-lt070me05000-v2-overlay.dts

   1 /*
   2  * Device Tree overlay to connect a JDI LT070ME05000 DSI panel to DSI1.
   3  * This uses 4 DSI data lanes, so can only be used with a Compute Module.
   4  *
   5  * The overlay is for V2 of Harlab's interface board that uses a PCA9536 to
   6  * handle the panel's control GPIOs instead of wiring it back to Pi GPIOs.
   7  *
   8  * Credit to Andrey Vostrukhin of Harlab for the overlay.
   9  *
  10  * Refer to https://github.com/harlab/CM4_LCD_LT070ME05000 for schematics and
  11  * other documentation.
  12  */
  13
  14 /dts-v1/;
  15 /plugin/;
  16
  17 / {
  18         compatible = "brcm,bcm2835";
  19
  20         fragment@0 {
  21                 target = <&i2c_csi_dsi>;
  22                 __overlay__ {
  23                         #address-cells = <1>;
  24                         #size-cells = <0>;
  25                         status = "okay";
  26
  27                         pca: pca@41 {
  28                                 compatible = "nxp,pca9536";
  29                                 reg = <0x41>;
  30                                 gpio-controller;
  31                                 #gpio-cells = <2>;
  32                                 status = "okay";
  33                         };
  34                 };
  35         };
  36
  37         fragment@1 {
  38                 target = <&dsi1>;
  39                 __overlay__{
  40                         status = "okay";
  41                         #address-cells = <1>;
  42                         #size-cells = <0>;
  43                         port {
  44                                 dsi_out_port:endpoint {
  45                                         remote-endpoint = <&panel_dsi_port>;
  46                                 };
  47                         };
  48
  49                         lt070me05000:lt070me05000@0 {
  50                                 compatible    = "jdi,lt070me05000";
  51                                 status        = "okay";
  52                                 reg           = <0>;
  53                                 reset-gpios   = <&pca 0 1>;
  54                                 enable-gpios  = <&pca 2 0>;
  55                                 dcdc-en-gpios = <&pca 1 0>;
  56                                 port {
  57                                         panel_dsi_port: endpoint {
  58                                                 remote-endpoint = <&dsi_out_port>;
  59                                         };
  60                                 };
  61                         };
  62                 };
  63         };
  64 };