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";
+      url = "github:nixos-uconsole/nixos-uconsole/v1.1.0";
-      inputs.nixpkgs.follows = "nixpkgs";
+      inputs.nixpkgs.follows = "nixpkgs-uconsole";
+      inputs.nixos-raspberrypi.follows = "nixos-raspberrypi";
     };
     nixos-raspberrypi = {
-      url = "github:nvmd/nixos-raspberrypi/v1.20260517.0";
+      url = "github:gortium/nixos-raspberrypi/cm5-cross-v1";
-      inputs.nixpkgs.follows = "nixpkgs";
+      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;
@@ -34,78 +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 = [
+        config.permittedInsecurePackages = [ "openclaw-2026.3.12" ];
-          "openclaw-2026.3.12"
-        ];
       };
-
       devShell = import ./shells/nix_dev.nix {
         inherit pkgs system agenix;
       };
-    in
+    in {
-      {
+      nixosConfigurations = {
-        nixosConfigurations = {
+        lazyworkhorse = nixpkgs.lib.nixosSystem {
-          lazyworkhorse = nixpkgs.lib.nixosSystem {
+          specialArgs = { inherit system self keys paths inputs; };
-            specialArgs = { inherit system self keys paths inputs; };
+          modules = [
-            modules = [
+            {
-              {
+              nixpkgs.overlays = overlays;
-                nixpkgs.overlays = overlays;
+              nixpkgs.config.allowUnfree = true;
-                nixpkgs.config.allowUnfree = true;
+              nixpkgs.config.rocmSupport = true;
-                nixpkgs.config.rocmSupport = true;
+              nixpkgs.config.permittedInsecurePackages = [ "openclaw-2026.3.12" ];
-                nixpkgs.config.permittedInsecurePackages = [
+              nix.package = lix.packages.${system}.default;
-                  "openclaw-2026.3.12"
+            }
-                ];
+            agenix.nixosModules.default
-                nix.package = lix.packages.${system}.default;
+            ./hosts/lazyworkhorse/configuration.nix
-              }
+            ./hosts/lazyworkhorse/hardware-configuration.nix
-              agenix.nixosModules.default
+            ./modules/nixos/filesystem/hoardingcow-mount.nix
-              ./hosts/lazyworkhorse/configuration.nix
+            ./modules/nixos/services/docker_manager.nix
-              ./hosts/lazyworkhorse/hardware-configuration.nix
+            ./modules/nixos/services/open_code_server.nix
-              ./modules/nixos/filesystem/hoardingcow-mount.nix
+            ./modules/nixos/services/ollama_init_custom_models.nix
-              ./modules/nixos/filesystem/poup-16t-disk.nix
+            ./modules/nixos/services/openclaw_node.nix
-              ./modules/nixos/services/docker_manager.nix
+            ./modules/nixos/security/ai-worker-restricted.nix
-              ./modules/nixos/services/open_code_server.nix
+            ./users/gortium.nix
-              ./modules/nixos/services/ollama_init_custom_models.nix
+            ./users/ai-worker.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 = [
-
+            {
-          cyt-pi = nixpkgs.lib.nixosSystem {
+              nixpkgs.overlays = overlays;
-            specialArgs = { inherit self keys paths inputs; };
+              nixpkgs.config.allowUnfree = true;
-            modules = [
+              nixpkgs.hostPlatform = "aarch64-linux";
-              {
+              nix.package = lix.packages."aarch64-linux".default;
-                nixpkgs.overlays = overlays;
+            }
-                nixpkgs.config.allowUnfree = true;
+            ./hosts/cyt-pi/configuration.nix
-                nixpkgs.hostPlatform = "aarch64-linux";
+            ./hosts/cyt-pi/hardware-configuration.nix
-                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;
-          uConsole = nixos-raspberrypi.lib.nixosSystem {
+            nixos-raspberrypi = nixos-raspberrypi;
-            specialArgs = { inherit self keys paths inputs nixos-raspberrypi; };
+            isCM4 = false;
-            modules = [
+          };
-              {
+          modules = [
-                nixpkgs.overlays = overlays;
+            {
-                nixpkgs.config.allowUnfree = true;
+              nixpkgs.buildPlatform = "x86_64-linux";
-                nixpkgs.hostPlatform = "aarch64-linux";
+              nixpkgs.hostPlatform = "aarch64-linux";
-                nix.package = lix.packages."aarch64-linux".default;
+              nixpkgs.config.allowUnfree = true;
-              }
+              boot.loader.raspberry-pi.bootloader = "kernel";
-              nixos-raspberrypi.nixosModules.raspberry-pi-5.base
+            }
-              nixos-uconsole.nixosModules.uconsole-cm5
+            nixos-raspberrypi.nixosModules.nixpkgs-rpi
-              ./hosts/uConsole/configuration.nix
+            # Fix display timings from Rex's kernel: native 720x1280 instead of
-              ./hosts/uConsole/hardware-configuration.nix
+            # 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;
+      };
+    };
 }

hosts/lazyworkhorse/configuration.nix

@@ -8,14 +8,6 @@
   # NAS Mounting
   hoardingcow-mount.enable = true;
 
-  # 16TB btrfs storage disk (WD Red Pro — Poup_16T — LUKS2 + btrfs + btrbk snapshots)
-  # ⚠ SETUP REQUIRED: Connect the disk, get the LUKS UUID with 'blkid /dev/sdb',
-  #   then set gortium.poup16t.luksUuid here and deploy.
-  # gortium.poup16t = {
-  #   enable = true;
-  #   luksUuid = "REPLACE_ME_WITH_REAL_UUID";
-  # };
-
   # Flakesss
   nix.settings.experimental-features = [ "nix-command" "flakes" "flake-self-attrs" ];
   nix.settings.trusted-users = [ "root" "gortium" ];

modules/nixos/filesystem/poup-16t-disk.nix

@@ -1,121 +0,0 @@
-{ config, lib, pkgs, ... }:
-
-let
-  cfg = config.gortium.poup16t;
-  luksName = cfg.luksName;
-in
-with lib;
-
-{
-  options.gortium.poup16t = {
-    enable = mkEnableOption "Poup_16T storage disk (btrfs + LUKS + btrbk snapshots)";
-
-    luksUuid = mkOption {
-      type = types.str;
-      description = ''
-        UUID of the LUKS partition on the 16TB disk (WD Red Pro).
-
-        Find this by running as root when the disk is connected:
-          blkid /dev/sdb   # or wherever the disk appears
-          lsblk -o NAME,SIZE,FSTYPE,UUID
-
-        Since btrfs is inside LUKS, the FS UUID is hidden — use the
-        LUKS partition UUID from blkid (it'll show TYPE=\"crypto_LUKS\").
-      '';
-      example = "00000000-0000-0000-0000-000000000000";
-    };
-
-    luksName = mkOption {
-      type = types.str;
-      default = "poup_16t";
-      description = "Name for the LUKS /dev/mapper/ mapping";
-    };
-
-    mountPoint = mkOption {
-      type = types.str;
-      default = "/mnt/Poup_16T";
-      description = "Mount point for the 16TB data disk";
-    };
-
-    btrfsOptions = mkOption {
-      type = types.listOf types.str;
-      default = [ "defaults" "noatime" "compress=zstd:3" "nofail" ];
-      description = "Mount options for the btrfs filesystem. 'nofail' ensures boot succeeds when disk is disconnected.";
-    };
-
-    btrbk = {
-      enable = mkOption {
-        type = types.bool;
-        default = true;
-        description = "Enable btrbk snapshot management on this volume";
-      };
-
-      schedule = mkOption {
-        type = types.str;
-        default = "daily";
-        description = "systemd calendar event for btrbk (e.g. 'daily', 'hourly', '*-*-* 00:00:00')";
-      };
-
-      preserveMin = mkOption {
-        type = types.str;
-        default = "2d";
-        description = "btrbk snapshot_preserve_min — minimum age before pruning";
-      };
-
-      preserve = mkOption {
-        type = types.str;
-        default = "14d 4w 3m";
-        description = "btrbk snapshot_preserve — retention policy (daily, weekly, monthly)";
-      };
-
-      snapshotDir = mkOption {
-        type = types.str;
-        default = ".snapshots";
-        description = "Directory name for snapshots relative to volume root";
-      };
-    };
-  };
-
-  config = mkIf cfg.enable {
-    # Enable btrfs kernel support (no DKMS needed — it's in-tree)
-    boot.supportedFilesystems = [ "btrfs" ];
-
-    # Install btrfs administration tools
-    environment.systemPackages = with pkgs; [
-      btrfs-progs       # mkfs.btrfs, btrfs, fsck, balance, scrub
-      btrbk             # Snapshot management + rotation
-    ];
-
-    # LUKS2 unlock at boot (uses keyfile or prompts if unavailable)
-    # Since the disk may be disconnected, initrd times out gracefully (~30s)
-    boot.initrd.luks.devices.${luksName} = {
-      device = "/dev/disk/by-uuid/${cfg.luksUuid}";
-      preLVM = false;
-      allowDiscards = true;
-    };
-
-    # Mount the unlocked mapper device as btrfs
-    fileSystems.${cfg.mountPoint} = {
-      device = "/dev/mapper/${luksName}";
-      fsType = "btrfs";
-      options = cfg.btrfsOptions;
-    };
-
-    # btrbk — automated snapshot creation and rotation
-    services.btrbk = mkIf cfg.btrbk.enable {
-      instances.poup16t = {
-        onCalendar = cfg.btrbk.schedule;
-        settings = {
-          snapshot_preserve_min = cfg.btrbk.preserveMin;
-          snapshot_preserve = cfg.btrbk.preserve;
-
-          volume.${cfg.mountPoint} = {
-            snapshot_create = "always";
-            snapshot_dir = cfg.btrbk.snapshotDir;
-            subvolume = ".";
-          };
-        };
-      };
-    };
-  };
-}

patches/0008-panel-cwu50-rex-timing-fix.patch

@@ -0,0 +1,45 @@
+--- a/drivers/gpu/drm/panel/panel-cwu50.c
++++ b/drivers/gpu/drm/panel/panel-cwu50.c
+@@ -27,12 +27,12 @@ static const struct drm_display_mode default_mode = {
+ 	.clock = 61020,
+-	.hdisplay = 1280,
+-	.hsync_start = 1280 + 8,
+-	.hsync_end = 1280 + 8 + 2,
+-	.htotal = 1280 + 8 + 2 + 16,
+-	.vdisplay = 720,
+-	.vsync_start = 720 + 30,
+-	.vsync_end = 720 + 30 + 15,
+-	.vtotal = 720 + 30 + 15 + 15,
++	.hdisplay = 720,
++	.hsync_start = 720 + 30,
++	.hsync_end = 720 + 30 + 15,
++	.htotal = 720 + 30 + 15 + 15,
++	.vdisplay = 1280,
++	.vsync_start = 1280 + 8,
++	.vsync_end = 1280 + 8 + 2,
++	.vtotal = 1280 + 8 + 2 + 16,
+ };
+ 
+ static inline struct cwu50 *panel_to_cwu50(struct drm_panel *panel)
+@@ -586,7 +586,8 @@ static int cwu50_init_sequence2(struct cwu50 *ctx)
+ {
+ 	struct mipi_dsi_device *dsi = to_mipi_dsi_device(ctx->dev);
+-	int err;
++	int err;
++	u8 buf[4];
+ 
+ 	dcs_write_seq(0xE0,0x00);
+ 
+@@ -633,6 +634,12 @@ static int cwu50_init_sequence2(struct cwu50 *ctx)
+ 
+ 	dcs_write_seq(0x11);// SLPOUT
+ 	msleep (200);
++	dcs_write_seq(0xE0,0x00);
++	mipi_dsi_dcs_read(dsi, 0x04, buf, 3);
++
++	if(buf[0] == 0x39) ctx->is_new_panel = 1;
++
++	dcs_write_seq(0xE0,0x00);
+ 
+ 	dcs_write_seq(0x29);// DSiPON
+ 	msleep (100);