guivm: Passthrough the multimedia keys

Thinkpad multimedia function keys have a different input device.
tiiuae · May 3, 2024 · 1b29e1a · 1b29e1a
1 parent c46113e
commit 1b29e1a
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diff --git a/modules/common/hardware/lenovo-x1/definitions/default.nix b/modules/common/hardware/lenovo-x1/definitions/default.nix
@@ -30,6 +30,8 @@ in {
   in ''
     # Laptop keyboard
     SUBSYSTEM=="input", ATTRS{name}=="AT Translated Set 2 keyboard", GROUP="kvm"
+    # Laptop keyboard multimedia buttons
+    SUBSYSTEM=="input", ATTRS{name}=="ThinkPad Extra Buttons", GROUP="kvm"
     # Laptop TrackPoint
     SUBSYSTEM=="input", ATTRS{name}=="TPPS/2 Elan TrackPoint", GROUP="kvm"
     # Lenovo X1 integrated webcam
@@ -44,6 +46,7 @@ in {
   virtioInputHostEvdevs = [
     # Lenovo X1 touchpad and keyboard
     "/dev/input/by-path/platform-i8042-serio-0-event-kbd"
+    "/dev/input/by-path/platform-thinkpad_acpi-event"
     "/dev/mouse"
     "/dev/touchpad"
     # Lenovo X1 trackpoint (red button/joystick)

diff --git a/targets/lenovo-x1/everything.nix b/targets/lenovo-x1/everything.nix
@@ -134,6 +134,7 @@
               "iommu=pt"
               # Prevent i915 module from being accidentally used by host
               "module_blacklist=i915"
+              "acpi_backlight=vendor"
 
               "vfio-pci.ids=${builtins.concatStringsSep "," vfioPciIds}"
             ];

diff --git a/targets/lenovo-x1/guivmExtraModules.nix b/targets/lenovo-x1/guivmExtraModules.nix
@@ -144,6 +144,24 @@
       };
     };
 
+    # Keyboard multimedia key bindings
+    programs.light.enable = true;
+    services.actkbd = {
+      enable = true;
+      bindings = [
+        {
+          keys = [224];
+          events = ["key"];
+          command = "/run/current-system/sw/bin/light -U 10";
+        }
+        {
+          keys = [225];
+          events = ["key"];
+          command = "/run/current-system/sw/bin/light -A 10";
+        }
+      ];
+    };
+
     # Open TCP port for the PDF XDG socket
     networking.firewall.allowedTCPPorts = [xdgPdfPort];
     # Early KMS needed for GNOME to work inside GuiVM