Add dolphin for gamecube and wii.

nix/steam_deck/configuration/roles/dolphin/files/Dolphin.ini

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+[Analytics]
+Enabled = False
+PermissionAsked = True
+[Core]
+GFXBackend = Vulkan
+# GFXBackend = OGL
+SlotA = 8 # GCI Folder (each game gets its own file)
+SlotB = 255 # None
+WiiSDCard = False
+[Display]
+RenderToMain = True
+[General]
+ISOPath0 = /home/deck/.persist/manual/games/nintendo_gamecube/roms
+ISOPath1 = /home/deck/.persist/manual/games/nintendo_wii/roms
+ISOPaths = 2
+RecursiveISOPaths = True
+[DSP]
+Backend = Cubeb
+# Backend = Pulse
+# Backend = ALSA
+[USBPassthrough]
+Devices = 057e:0305
+# BluetoothPassthrough must be at the end for the pairings to save properly
+[BluetoothPassthrough]
+Enabled = True

nix/steam_deck/configuration/roles/dolphin/files/GCPadNew.ini

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+[GCPad1]
+Device = SDL/0/Steam Deck Controller
+Buttons/A = `Button S`
+Buttons/B = `Button E`
+Buttons/X = `Button W`
+Buttons/Y = `Button N`
+Buttons/Z = `Shoulder R`
+Buttons/Start = Start
+Main Stick/Up = `Left Y+`
+Main Stick/Down = `Left Y-`
+Main Stick/Left = `Left X-`
+Main Stick/Right = `Left X+`
+Main Stick/Modifier = `Thumb L`
+Main Stick/Calibration = 100.00 101.96 108.24 120.27 137.87 120.27 108.24 101.96 100.00 101.96 108.24 120.27 141.42 120.27 108.24 101.96 100.00 101.96 108.24 120.27 141.42 120.27 108.24 101.96 100.00 101.96 108.24 120.27 136.32 120.27 108.24 101.96
+C-Stick/Up = `Right Y+`
+C-Stick/Down = `Right Y-`
+C-Stick/Left = `Right X-`
+C-Stick/Right = `Right X+`
+C-Stick/Modifier = `Thumb R`
+C-Stick/Calibration = 100.00 101.96 108.24 120.27 141.42 120.27 108.24 101.96 100.00 101.96 108.24 120.27 136.25 120.27 108.24 101.96 100.00 101.96 108.24 120.27 134.42 120.27 108.24 101.96 100.00 101.96 108.24 120.27 141.42 120.27 108.24 101.96
+D-Pad/Up = `Pad N`
+D-Pad/Down = `Pad S`
+D-Pad/Left = `Pad W`
+D-Pad/Right = `Pad E`
+Triggers/L-Analog = `Trigger L`
+Triggers/R-Analog = `Trigger R`
+[GCPad2]
+Device = XInput2/0/Virtual core pointer
+[GCPad3]
+Device = XInput2/0/Virtual core pointer
+[GCPad4]
+Device = XInput2/0/Virtual core pointer

nix/steam_deck/configuration/roles/dolphin/files/GFX.ini

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+# [Enhancements]
+#MaxAnisotropy = 4 # 16x Anisotropic texture filtering
+# MaxAnisotropy = 2 # 4x Anisotropic texture filtering
+#MaxAnisotropy = 1 # 2x Anisotropic texture filtering
+#MaxAnisotropy = 0 # default
+[Settings]
+WaitForShadersBeforeStarting = True
+# WaitForShadersBeforeStarting = False
+# MSAA = 0x00000004 # 4x MSAA
+#MSAA = 0x00000002 # 2x MSAA
+#MSAA = 0x00000001 # none
+SSAA = False
+# InternalResolution = 1 # 2x native
+#ShaderCompilationMode = 2 # Hybrid ubershaders
+ShaderCompilationMode = 3 # Skip
+# ShowGraphs = True

nix/steam_deck/configuration/roles/dolphin/files/deck.ini

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+[Profile]
+Device = SDL/0/Steam Deck Controller
+Buttons/A = `Button S`
+Buttons/B = `Button E`
+Buttons/X = `Button W`
+Buttons/Y = `Button N`
+Buttons/Z = `Shoulder R`
+Buttons/Start = Start
+Main Stick/Up = `Left Y+`
+Main Stick/Down = `Left Y-`
+Main Stick/Left = `Left X-`
+Main Stick/Right = `Left X+`
+Main Stick/Modifier = `Thumb L`
+Main Stick/Calibration = 100.00 101.96 108.24 120.27 137.87 120.27 108.24 101.96 100.00 101.96 108.24 120.27 141.42 120.27 108.24 101.96 100.00 101.96 108.24 120.27 141.42 120.27 108.24 101.96 100.00 101.96 108.24 120.27 136.32 120.27 108.24 101.96
+C-Stick/Up = `Right Y+`
+C-Stick/Down = `Right Y-`
+C-Stick/Left = `Right X-`
+C-Stick/Right = `Right X+`
+C-Stick/Modifier = `Thumb R`
+C-Stick/Calibration = 100.00 101.96 108.24 120.27 141.42 120.27 108.24 101.96 100.00 101.96 108.24 120.27 136.25 120.27 108.24 101.96 100.00 101.96 108.24 120.27 134.42 120.27 108.24 101.96 100.00 101.96 108.24 120.27 141.42 120.27 108.24 101.96
+Triggers/L-Analog = `Trigger L`
+Triggers/R-Analog = `Trigger R`
+D-Pad/Up = `Pad N`
+D-Pad/Down = `Pad S`
+D-Pad/Left = `Pad W`
+D-Pad/Right = `Pad E`