arch/arm/boot/dts/overlays/vc4-kms-vga666-overlay.dts

   1 /*
   2  * vc4-kms-vga666-overlay.dts
   3  * Configures a FenLogic or similar VGA666 DPI adapter when using the
   4  * vc4-kms-v3d driver.
   5  * If a suitable I2C level shifter is connected to GPIOs 0&1 and the VGA
   6  * ID1/SDA (pin 12) and ID3/SCL (pin 15) lines, then there is the option to
   7  * enable reading the EDID from the display.
   8  */
   9
  10 /dts-v1/;
  11 /plugin/;
  12
  13 #include <dt-bindings/pinctrl/bcm2835.h>
  14
  15 / {
  16         compatible = "brcm,bcm2835";
  17
  18         fragment@0 {
  19                 target-path = "/";
  20                 __overlay__ {
  21                         vga_connector: vga_connector {
  22                                 compatible = "vga-connector";
  23                                 label = "vga";
  24
  25                                 port {
  26                                         vga_con_in: endpoint {
  27                                                 remote-endpoint = <&vga666_out>;
  28                                         };
  29                                 };
  30                         };
  31
  32                         vga_dac {
  33                                 compatible = "dumb-vga-dac";
  34
  35                                 ports {
  36                                         #address-cells = <1>;
  37                                         #size-cells = <0>;
  38
  39                                         port@0 {
  40                                                 reg = <0>;
  41
  42                                                 vga666_in: endpoint {
  43                                                         remote-endpoint = <&dpi_out>;
  44                                                 };
  45                                         };
  46
  47                                         port@1 {
  48                                                 reg = <1>;
  49
  50                                                 vga666_out: endpoint {
  51                                                         remote-endpoint = <&vga_con_in>;
  52                                                 };
  53                                         };
  54                                 };
  55                         };
  56
  57                 };
  58         };
  59
  60         fragment@1 {
  61                 target = <&dpi>;
  62                 __overlay__  {
  63                         status = "okay";
  64
  65                         pinctrl-names = "default";
  66                         pinctrl-0 = <&dpi_18bit_gpio2>;
  67
  68                         port {
  69                                 dpi_out: endpoint@0 {
  70                                         remote-endpoint = <&vga666_in>;
  71                                 };
  72                         };
  73                 };
  74         };
  75
  76         fragment@2 {
  77                 target = <&vga_connector>;
  78                 __dormant__  {
  79                         ddc-i2c-bus = <&i2c_vc>;
  80                 };
  81         };
  82
  83         fragment@3 {
  84                 target = <&i2c0if>;
  85                 __dormant__ {
  86                         status = "okay";
  87                 };
  88         };
  89
  90         fragment@4 {
  91                 target = <&i2c0mux>;
  92                 __dormant__ {
  93                         status = "okay";
  94                 };
  95         };
  96
  97         __overrides__ {
  98                 ddc = <0>,"=2", <0>,"=3", <0>,"=4";
  99         };
 100 };