git.openwrt.org Git - openwrt/staging/xback.git/blob

   1 From 61b138adaeaddefe749f421a3b69c67d4a49a8e3 Mon Sep 17 00:00:00 2001
   2 From: Dave Stevenson <dave.stevenson@raspberrypi.com>
   3 Date: Wed, 11 Oct 2023 11:03:51 +0100
   4 Subject: [PATCH] dt: Add overrides for drm framebuffer allocations on Pi5
   5
   6 Adds dtparam overrides to the base Pi5 DT such that vc4,
   7 DSI0, DSI1, or DPI can be requested to be /dev/fb[012].
   8 No override is specified by default, so the order will be
   9 based on probe order (aka semi-random). Any device that
  10 doesn't have an override specified will be placed above
  11 all specified overrides. Having an fb1 or fb2 override but
  12 no fb0 one will result in no console via fbcon.
  13
  14 Signed-off-by: Dave Stevenson <dave.stevenson@raspberrypi.com>
  15 ---
  16  arch/arm/boot/dts/bcm2712-rpi-5-b.dts | 12 ++++++++++++
  17  arch/arm/boot/dts/overlays/README     | 24 ++++++++++++++++++++++++
  18  2 files changed, 36 insertions(+)
  19
  20 --- a/arch/arm/boot/dts/bcm2712-rpi-5-b.dts
  21 +++ b/arch/arm/boot/dts/bcm2712-rpi-5-b.dts
  22 @@ -824,5 +824,17 @@ spi10_cs_pins: &spi10_cs_gpio1 {};
  23                 act_led_trigger = <&act_led>, "linux,default-trigger";
  24                 pwr_led_activelow = <&pwr_led>, "gpios:8";
  25                 pwr_led_trigger = <&pwr_led>, "linux,default-trigger";
  26 +               drm_fb0_rp1_dsi0 = <&aliases>, "drm_fb0=",&dsi0;
  27 +               drm_fb0_rp1_dsi1 = <&aliases>, "drm_fb0=",&dsi1;
  28 +               drm_fb0_rp1_dpi = <&aliases>, "drm_fb0=",&dpi;
  29 +               drm_fb0_vc4 = <&aliases>, "drm_fb0=",&vc4;
  30 +               drm_fb1_rp1_dsi0 = <&aliases>, "drm_fb1=",&dsi0;
  31 +               drm_fb1_rp1_dsi1 = <&aliases>, "drm_fb1=",&dsi1;
  32 +               drm_fb1_rp1_dpi = <&aliases>, "drm_fb1=",&dpi;
  33 +               drm_fb1_vc4 = <&aliases>, "drm_fb1=",&vc4;
  34 +               drm_fb2_rp1_dsi0 = <&aliases>, "drm_fb2=",&dsi0;
  35 +               drm_fb2_rp1_dsi1 = <&aliases>, "drm_fb2=",&dsi1;
  36 +               drm_fb2_rp1_dpi = <&aliases>, "drm_fb2=",&dpi;
  37 +               drm_fb2_vc4 = <&aliases>, "drm_fb2=",&vc4;
  38         };
  39  };
  40 --- a/arch/arm/boot/dts/overlays/README
  41 +++ b/arch/arm/boot/dts/overlays/README
  42 @@ -173,6 +173,30 @@ Params:
  43          cooling_fan             Enables the Pi 5 cooling fan (enabled
  44                                  automatically by the firmware)
  45
  46 +        drm_fb0_rp1_dpi         Assign /dev/fb0 to the RP1 DPI output
  47 +
  48 +        drm_fb0_rp1_dsi0        Assign /dev/fb0 to the RP1 DSI0 output
  49 +
  50 +        drm_fb0_rp1_dsi1        Assign /dev/fb0 to the RP1 DSI1 output
  51 +
  52 +        drm_fb0_vc4             Assign /dev/fb0 to the vc4 outputs
  53 +
  54 +        drm_fb1_rp1_dpi         Assign /dev/fb1 to the RP1 DPI output
  55 +
  56 +        drm_fb1_rp1_dsi0        Assign /dev/fb1 to the RP1 DSI0 output
  57 +
  58 +        drm_fb1_rp1_dsi1        Assign /dev/fb1 to the RP1 DSI1 output
  59 +
  60 +        drm_fb1_vc4             Assign /dev/fb1 to the vc4 outputs
  61 +
  62 +        drm_fb2_rp1_dpi         Assign /dev/fb2 to the RP1 DPI output
  63 +
  64 +        drm_fb2_rp1_dsi0        Assign /dev/fb2 to the RP1 DSI0 output
  65 +
  66 +        drm_fb2_rp1_dsi1        Assign /dev/fb2 to the RP1 DSI1 output
  67 +
  68 +        drm_fb2_vc4             Assign /dev/fb2 to the vc4 outputs
  69 +
  70          eee                     Enable Energy Efficient Ethernet support for
  71                                  compatible devices (default "on"). See also
  72                                  "tx_lpi_timer". Pi3B+ only.