target/linux/bcm27xx/patches-5.15/950-0599-dtoverlays-Add-a-generic-DPI-panel-overlay-for-KMS.patch

   1 From 208d270a7b613e5593390d38a9fba8bd248c5928 Mon Sep 17 00:00:00 2001
   2 From: Dave Stevenson <dave.stevenson@raspberrypi.com>
   3 Date: Thu, 2 Dec 2021 18:06:37 +0000
   4 Subject: [PATCH] dtoverlays: Add a generic DPI panel overlay for KMS
   5
   6 Uses the "panel-dpi" compatible to set panel timings from
   7 DT.
   8
   9 Signed-off-by: Dave Stevenson <dave.stevenson@raspberrypi.com>
  10 ---
  11  arch/arm/boot/dts/overlays/Makefile           |  1 +
  12  arch/arm/boot/dts/overlays/README             | 28 ++++++
  13  .../overlays/vc4-kms-dpi-generic-overlay.dts  | 92 +++++++++++++++++++
  14  3 files changed, 121 insertions(+)
  15  create mode 100644 arch/arm/boot/dts/overlays/vc4-kms-dpi-generic-overlay.dts
  16
  17 --- a/arch/arm/boot/dts/overlays/Makefile
  18 +++ b/arch/arm/boot/dts/overlays/Makefile
  19 @@ -232,6 +232,7 @@ dtbo-$(CONFIG_ARCH_BCM2835) += \
  20         vc4-fkms-v3d.dtbo \
  21         vc4-fkms-v3d-pi4.dtbo \
  22         vc4-kms-dpi-at056tn53v1.dtbo \
  23 +       vc4-kms-dpi-generic.dtbo \
  24         vc4-kms-dsi-7inch.dtbo \
  25         vc4-kms-dsi-lt070me05000.dtbo \
  26         vc4-kms-dsi-lt070me05000-v2.dtbo \
  27 --- a/arch/arm/boot/dts/overlays/README
  28 +++ b/arch/arm/boot/dts/overlays/README
  29 @@ -3563,6 +3563,34 @@ Load:   dtoverlay=vc4-kms-dpi-at056tn53v
  30  Params: <None>
  31
  32
  33 +Name:   vc4-kms-dpi-generic
  34 +Info:   Enable a generic DPI display under KMS. Default timings are for the
  35 +        Adafruit Kippah with 800x480 panel and RGB666 (GPIOs 0-21)
  36 +        Requires vc4-kms-v3d to be loaded.
  37 +Load:   dtoverlay=vc4-kms-dpi-generic,<param>=<val>
  38 +Params: clock-frequency         Display clock frequency (Hz)
  39 +        hactive                 Horizontal active pixels
  40 +        hfp                     Horizontal front porch
  41 +        hsync                   Horizontal sync pulse width
  42 +        hbp                     Horizontal back porch
  43 +        vactive                 Vertical active lines
  44 +        vfp                     Vertical front porch
  45 +        vsync                   Vertical sync pulse width
  46 +        vbp                     Vertical back porch
  47 +        hsync-invert            Horizontal sync active low
  48 +        vsync-invert            Vertical sync active low
  49 +        de-invert               Data Enable active low
  50 +        pixclk-invert           Negative edge pixel clock
  51 +        width-mm                Define the screen width in mm
  52 +        height-mm               Define the screen height in mm
  53 +        rgb565                  Change to RGB565 output on GPIOs 0-19
  54 +        rgb666-padhi            Change to RGB666 output on GPIOs 0-9, 12-17, and
  55 +                                20-25
  56 +        rgb888                  Change to RGB888 output on GPIOs 0-27
  57 +        bus-format              Override the bus format for a MEDIA_BUS_FMT_*
  58 +                                value. NB also overridden by rgbXXX overrides.
  59 +
  60 +
  61  Name:   vc4-kms-dsi-7inch
  62  Info:   Enable the Raspberry Pi DSI 7" screen.
  63          Includes the edt-ft5406 for the touchscreen element.
  64 --- /dev/null
  65 +++ b/arch/arm/boot/dts/overlays/vc4-kms-dpi-generic-overlay.dts
  66 @@ -0,0 +1,92 @@
  67 +/*
  68 + * vc4-kms-dpi-at056tn53v1-overlay.dts
  69 + */
  70 +
  71 +/dts-v1/;
  72 +/plugin/;
  73 +
  74 +#include <dt-bindings/gpio/gpio.h>
  75 +#include <dt-bindings/pinctrl/bcm2835.h>
  76 +
  77 +/ {
  78 +       compatible = "brcm,bcm2835";
  79 +
  80 +       fragment@0 {
  81 +               target-path = "/";
  82 +               __overlay__ {
  83 +                       panel: panel {
  84 +                               compatible = "panel-dpi";
  85 +
  86 +                               width-mm = <154>;
  87 +                               height-mm = <83>;
  88 +                               bus-format = <0x1009>;
  89 +
  90 +                               timing: panel-timing {
  91 +                                       clock-frequency = <29500000>;
  92 +                                       hactive = <800>;
  93 +                                       hfront-porch = <24>;
  94 +                                       hsync-len = <72>;
  95 +                                       hback-porch = <96>;
  96 +                                       hsync-active = <0>;
  97 +                                       vactive = <480>;
  98 +                                       vfront-porch = <3>;
  99 +                                       vsync-len = <10>;
 100 +                                       vback-porch = <7>;
 101 +                                       vsync-active = <0>;
 102 +
 103 +                                       de-active = <1>;
 104 +                                       pixelclk-active = <1>;
 105 +                               };
 106 +
 107 +                               port {
 108 +                                       panel_in: endpoint {
 109 +                                               remote-endpoint = <&dpi_out>;
 110 +                                       };
 111 +                               };
 112 +                       };
 113 +               };
 114 +       };
 115 +
 116 +       fragment@1 {
 117 +               target = <&dpi>;
 118 +               dpi_node: __overlay__  {
 119 +                       status = "okay";
 120 +
 121 +                       pinctrl-names = "default";
 122 +                       pinctrl-0 = <&dpi_18bit_gpio0>;
 123 +
 124 +                       port {
 125 +                               dpi_out: endpoint {
 126 +                                       remote-endpoint = <&panel_in>;
 127 +                               };
 128 +                       };
 129 +               };
 130 +       };
 131 +
 132 +       __overrides__ {
 133 +               clock-frequency = <&timing>, "clock-frequency:0";
 134 +               hactive = <&timing>, "hactive:0";
 135 +               hfp = <&timing>, "hfront-porch:0";
 136 +               hsync = <&timing>, "hsync-len:0";
 137 +               hbp = <&timing>, "hback-porch:0";
 138 +               vactive = <&timing>, "vactive:0";
 139 +               vfp = <&timing>, "vfront-porch:0";
 140 +               vsync = <&timing>, "vsync-len:0";
 141 +               vbp = <&timing>, "vback-porch:0";
 142 +               hsync-invert = <&timing>, "hsync-active:0=0";
 143 +               vsync-invert = <&timing>, "vsync-active:0=0";
 144 +               de-invert = <&timing>, "de-active:0=0";
 145 +               pixclk-invert = <&timing>, "pixelclk-active:0=0";
 146 +
 147 +               width-mm = <&panel>, "width-mm:0";
 148 +               height-mm = <&panel>, "height-mm:0";
 149 +
 150 +               rgb565 = <&panel>, "bus-format:0=0x1017",
 151 +                       <&dpi_node>, "pinctrl-0:0=",<&dpi_16bit_gpio0>;
 152 +               rgb666-padhi = <&panel>, "bus-format:0=0x1015",
 153 +                       <&dpi_node>, "pinctrl-0:0=",<&dpi_18bit_cpadhi_gpio0>;
 154 +               rgb888 = <&panel>, "bus-format:0=0x100a",
 155 +                       <&dpi_node>, "pinctrl-0:0=",<&dpi_gpio0>;
 156 +               bus-format = <&panel>, "bus-format:0";
 157 +       };
 158 +};