hyprland-displaylink-git

displaylink.patch

diff --git a/render/egl.c b/render/egl.c
index 8a1e6dae..d0e6adb6 100644
--- a/render/egl.c
+++ b/render/egl.c
@@ -508,8 +508,43 @@ static int open_render_node(int drm_fd) {
 		}
 		wlr_log(WLR_DEBUG, "DRM device '%s' has no render node, "
 			"falling back to primary node", render_name);
+
+		drmVersion *render_version = drmGetVersion(drm_fd);
+		if (render_version != NULL && render_version->name != NULL) {
+			wlr_log(WLR_DEBUG, "DRM device version.name '%s'", render_version->name);
+			if (strcmp(render_version->name, "evdi") == 0) {
+				free(render_name);
+
+				uint32_t flags = 0;
+				const int devices_len = drmGetDevices2(flags, NULL, 0);
+				if (devices_len < 0) {
+					wlr_log(WLR_ERROR, "drmGetDevices2 failed: %s", strerror(-devices_len));
+					return -1;
+				}
+
+				const char *render_devices[] = {
+					"/dev/dri/card0",
+					"/dev/dri/card1",
+					"/dev/dri/card2",
+					"/dev/dri/card3",
+					"/dev/dri/card4",
+					"/dev/dri/card5",
+					"/dev/dri/card6",
+					"/dev/dri/card7",
+					"/dev/dri/card8",
+					"/dev/dri/card9",
+					NULL
+				};
+
+				render_name = malloc(sizeof(char)*15);
+				render_name = strcpy(render_name, render_devices[env_parse_switch("WLR_EVDI_RENDER_DEVICE", render_devices)]);
+			}
+			drmFreeVersion(render_version);
+		}
 	}

+	wlr_log(WLR_DEBUG, "open_render_node() DRM device '%s'", render_name);
+
 	int render_fd = open(render_name, O_RDWR | O_CLOEXEC);
 	if (render_fd < 0) {
 		wlr_log_errno(WLR_ERROR, "Failed to open DRM node '%s'", render_name);

PKGBUILD

# Maintainer: Clément POIRET <poiret dot clement at outlook dot fr>

_pkgname="hyprland"
pkgname="${_pkgname}-displaylink-git"
pkgver="0.38.1"
pkgrel=1
pkgdesc="A dynamic tiling Wayland compositor based on wlroots that doesn't sacrifice on its looks. (DisplayLink patch)"
arch=(any)
url="https://github.com/hyprwm/Hyprland"
license=('BSD')
depends=(
  cairo
  gcc-libs
  glib2
  glibc
  glslang
  hyprlang
  hyprcursor
  libdisplay-info
  libdrm
  libglvnd
  libinput
  libliftoff
  libx11
  libxcb
  libxcomposite
  libxfixes
  libxkbcommon
  libxrender
  opengl-driver
  pango
  pixman
  polkit
  seatd
  systemd-libs
  tomlplusplus
  wayland
  wayland-protocols
  xcb-proto
  xcb-util
  xcb-util-errors
  xcb-util-keysyms
  xcb-util-renderutil
  xcb-util-wm
  xorg-xinput
  xorg-xwayland
)
depends+=(libdisplay-info.so)
makedepends=(
  cmake
  gdb
  git
  jq
  meson
  ninja
  pkgconf
  xorgproto
)
source=(
  "${pkgname}-${pkgver}.tar.gz::https://github.com/hyprwm/Hyprland/releases/download/v${pkgver}/source-v${pkgver}.tar.gz"
  "displaylink.patch"
  )
conflicts=("${_pkgname}")
provides=(hyprland)
sha256sums=('1a86365cc006fca4bc96c6c41347d0bde048b6463c516e09b9c54cff58fb73ab'
            '70c8f6af41ed252c2cee7b1fc0b29ff29c7f81932a9dd3014716571b0728e5ab')
options=(!makeflags !buildflags !strip)

prepare() {
    cd "$srcdir/hyprland-source"
    patch -d subprojects/wlroots -Np1 < ../displaylink.patch
}

build() {
    cd "$srcdir/hyprland-source"

    meson setup build \
        --prefix     /usr \
        --libexecdir lib \
        --sbindir    bin \
        --buildtype  release \
        --wrap-mode  nodownload \
        -D           b_lto=true \
        -D           b_pie=true \
        -D           default_library=shared \
        -D           xwayland=enabled \
        -D           systemd=enabled

    meson compile -C build
}

package() {
  cd "$srcdir/hyprland-source"

  meson install -C build \
    --destdir "$pkgdir" \
    --skip-subprojects hyprland-protocols

  mkdir "$pkgdir/usr/include/hyprland/wlroots"
  mv "$pkgdir/usr/include/wlr" "$pkgdir/usr/include/hyprland/wlroots"

  # resolve conflicts with system wlr
  rm -f "$pkgdir/usr/lib/libwlroots.so"
  rm -rf "$pkgdir/usr/lib/pkgconfig"

  # FIXME: remove after xdg-desktop-portal-hyprland disowns hyprland-portals.conf

  rm -rf "$pkgdir/usr/share/xdg-desktop-portal"

  # license
  install -Dm0644 -t "$pkgdir/usr/share/licenses/${pkgname}" LICENSE
}

Hopefully one day this patch will be merged into wlroots, let's cross our fingers :)