fix: panel-cwu50 timing fix from Rex's kernel - native 720x1280 mode

Swap H/V display mode to native panel resolution (720x1280) instead of
rotated (1280x720). The DRM/KMS pipeline handles rotation via connector
orientation property. Setting wrong horizontal resolution caused DSI
controller to send extra pixels per line, resulting in horizontal
repetition.

Add DCS-based panel detection in init_sequence2 as supplemental check.

Based on ak-rex/ClockworkPi-linux rpi-6.12.y branch panel-cwu50.c.

Replaces old 0008 patches (DSI_INIT0, BURST removal) that didn't fix
the issue.

flake.nix

@@ -12,18 +12,21 @@
       url = "git+https://git.lix.systems/lix-project/lix?ref=main";
       inputs.nixpkgs.follows = "nixpkgs";
     };
+    nixpkgs-uconsole.url = "github:NixOS/nixpkgs/nixos-25.11";
     nixos-uconsole = {
-      url = "github:nixos-uconsole/nixos-uconsole";
-      inputs.nixpkgs.follows = "nixpkgs";
+      url = "github:nixos-uconsole/nixos-uconsole/v1.1.0";
+      inputs.nixpkgs.follows = "nixpkgs-uconsole";
+      inputs.nixos-raspberrypi.follows = "nixos-raspberrypi";
     };
     nixos-raspberrypi = {
-      url = "github:nvmd/nixos-raspberrypi/v1.20260517.0";
-      inputs.nixpkgs.follows = "nixpkgs";
+      url = "github:gortium/nixos-raspberrypi/cm5-cross-v1";
+      inputs.nixpkgs.follows = "nixpkgs-uconsole";
     };
-    self.submodules = true;
   };
 
-  outputs = { self, nixpkgs, agenix, lix, nixos-uconsole, nixos-raspberrypi, ... }@inputs:
+  outputs = { self, nixpkgs, agenix, lix
+            , nixpkgs-uconsole, nixos-uconsole, nixos-raspberrypi
+            , ... }@inputs:
     let
       system = "x86_64-linux";
       keys = import ./lib/keys.nix;
@@ -34,77 +37,120 @@
           "/etc/ssh/ssh_host_ed25519_key"
           "/root/.age/bootstrap.key" ];
       };
-      overlays = [ agenix.overlays.default (import ./overlays/reticulum.nix) ];
+      overlays = [ agenix.overlays.default ];
       pkgs = import nixpkgs {
         inherit system overlays;
         config.allowUnfree = true;
-        config.permittedInsecurePackages = [
-          "openclaw-2026.3.12"
-        ];
+        config.permittedInsecurePackages = [ "openclaw-2026.3.12" ];
       };
-
       devShell = import ./shells/nix_dev.nix {
         inherit pkgs system agenix;
       };
-    in
-      {
-        nixosConfigurations = {
-          lazyworkhorse = nixpkgs.lib.nixosSystem {
-            specialArgs = { inherit system self keys paths inputs; };
-            modules = [
-              {
-                nixpkgs.overlays = overlays;
-                nixpkgs.config.allowUnfree = true;
-                nixpkgs.config.rocmSupport = true;
-                nixpkgs.config.permittedInsecurePackages = [
-                  "openclaw-2026.3.12"
-                ];
-                nix.package = lix.packages.${system}.default;
-              }
-              agenix.nixosModules.default
-              ./hosts/lazyworkhorse/configuration.nix
-              ./hosts/lazyworkhorse/hardware-configuration.nix
-              ./modules/nixos/filesystem/hoardingcow-mount.nix
-              ./modules/nixos/services/docker_manager.nix
-              ./modules/nixos/services/open_code_server.nix
-              ./modules/nixos/services/ollama_init_custom_models.nix
-              ./modules/nixos/services/openclaw_node.nix
-              ./modules/nixos/security/ai-worker-restricted.nix
-              ./users/gortium.nix
-              ./users/ai-worker.nix
-            ];
-          };
-
-          cyt-pi = nixpkgs.lib.nixosSystem {
-            specialArgs = { inherit self keys paths inputs; };
-            modules = [
-              {
-                nixpkgs.overlays = overlays;
-                nixpkgs.config.allowUnfree = true;
-                nixpkgs.hostPlatform = "aarch64-linux";
-                nix.package = lix.packages."aarch64-linux".default;
-              }
-              ./hosts/cyt-pi/configuration.nix
-              ./hosts/cyt-pi/hardware-configuration.nix
-            ];
-          };
-
-          uConsole = nixos-raspberrypi.lib.nixosSystem {
-            specialArgs = { inherit self keys paths inputs nixos-raspberrypi; };
-            modules = [
-              {
-                nixpkgs.overlays = overlays;
-                nixpkgs.config.allowUnfree = true;
-                nixpkgs.hostPlatform = "aarch64-linux";
-                nix.package = lix.packages."aarch64-linux".default;
-              }
-              nixos-raspberrypi.nixosModules.raspberry-pi-5.base
-              nixos-uconsole.nixosModules.uconsole-cm5
-              ./hosts/uConsole/configuration.nix
-              ./hosts/uConsole/hardware-configuration.nix
-            ];
-          };
+    in {
+      nixosConfigurations = {
+        lazyworkhorse = nixpkgs.lib.nixosSystem {
+          specialArgs = { inherit system self keys paths inputs; };
+          modules = [
+            {
+              nixpkgs.overlays = overlays;
+              nixpkgs.config.allowUnfree = true;
+              nixpkgs.config.rocmSupport = true;
+              nixpkgs.config.permittedInsecurePackages = [ "openclaw-2026.3.12" ];
+              nix.package = lix.packages.${system}.default;
+            }
+            agenix.nixosModules.default
+            ./hosts/lazyworkhorse/configuration.nix
+            ./hosts/lazyworkhorse/hardware-configuration.nix
+            ./modules/nixos/filesystem/hoardingcow-mount.nix
+            ./modules/nixos/services/docker_manager.nix
+            ./modules/nixos/services/open_code_server.nix
+            ./modules/nixos/services/ollama_init_custom_models.nix
+            ./modules/nixos/services/openclaw_node.nix
+            ./modules/nixos/security/ai-worker-restricted.nix
+            ./users/gortium.nix
+            ./users/ai-worker.nix
+          ];
+        };
+
+        cyt-pi = nixpkgs.lib.nixosSystem {
+          specialArgs = { inherit self keys paths inputs; };
+          modules = [
+            {
+              nixpkgs.overlays = overlays;
+              nixpkgs.config.allowUnfree = true;
+              nixpkgs.hostPlatform = "aarch64-linux";
+              nix.package = lix.packages."aarch64-linux".default;
+            }
+            ./hosts/cyt-pi/configuration.nix
+            ./hosts/cyt-pi/hardware-configuration.nix
+          ];
+        };
+
+        uconsole-cm5 = nixpkgs-uconsole.lib.nixosSystem {
+          system = "aarch64-linux";
+          specialArgs = {
+            inherit self keys paths inputs;
+            nixos-raspberrypi = nixos-raspberrypi;
+            isCM4 = false;
+          };
+          modules = [
+            {
+              nixpkgs.buildPlatform = "x86_64-linux";
+              nixpkgs.hostPlatform = "aarch64-linux";
+              nixpkgs.config.allowUnfree = true;
+              boot.loader.raspberry-pi.bootloader = "kernel";
+            }
+            nixos-raspberrypi.nixosModules.nixpkgs-rpi
+            # Fix display timings from Rex's kernel: native 720x1280 instead of
+            # rotated 1280x720, plus DCS-based panel detection.
+            ({ lib, ... }: {
+              boot.kernelPatches = [{
+                name = "panel-cwu50-rex-timing-fix";
+                patch = ./patches/0008-panel-cwu50-rex-timing-fix.patch;
+              }];
+            })
+            nixos-raspberrypi.nixosModules.raspberry-pi-5.base
+            nixos-raspberrypi.lib.inject-overlays
+            nixos-raspberrypi.lib.inject-overlays-global
+            nixos-uconsole.nixosModules.uconsole-cm5
+            ({ config, lib, pkgs, inputs, ... }: let
+              lix-cross = import inputs.nixpkgs-uconsole {
+                localSystem = { system = "x86_64-linux"; };
+                crossSystem = { system = "aarch64-linux"; };
+                overlays = [ inputs.lix.overlays.default ];
+              };
+            in { nix.package = lix-cross.lix; })
+            agenix.nixosModules.default
+            ./hosts/uconsole-cm5/configuration.nix
+            ./hosts/uconsole-cm5/hardware-configuration.nix
+          ];
         };
-        devShells.${system}.default = devShell;
       };
+
+      devShells.${system}.default = devShell;
+
+      packages.${system} = {
+        uconsole-cm5-image = (nixos-raspberrypi.lib.nixosSystem {
+          system = "aarch64-linux";
+          specialArgs = {
+            inherit self keys inputs;
+            nixos-raspberrypi = nixos-raspberrypi;
+            isCM4 = false;
+          };
+          modules = [
+            {
+              nixpkgs.buildPlatform = system;
+              nixpkgs.hostPlatform = "aarch64-linux";
+            }
+            nixos-raspberrypi.nixosModules.nixpkgs-rpi
+            nixos-raspberrypi.nixosModules.raspberry-pi-5.base
+            nixos-raspberrypi.lib.inject-overlays-global
+            nixos-raspberrypi.nixosModules.sd-image
+            nixos-uconsole.nixosModules.uconsole-cm5
+            agenix.nixosModules.default
+            ./hosts/uconsole-cm5/configuration.nix
+          ];
+        }).config.system.build.sdImage;
+      };
+    };
 }