Third build variant (--variant no-panel) that includes all 18 panel
DTBs for both original and clone hardware. Designed for the future
Arch R Flasher app to inject the correct kernel.dtb at flash time.
- boot.ini: auto-detect root device from mmcdev (no more __ROOTDEV__)
- build-image.sh: no-panel uses mainline U-Boot, copies all DTBs
- panel-detect.py: wizard disabled for no-panel variant
- build-all.sh: generates third image (ArchR-R36S-no-panel)
- input-merge daemon: combines gpio-keys + adc-joystick into single
virtual "Arch R Gamepad" via uinput so RetroArch sees one device
(fixes analog sticks ignored due to max_users=1)
- retroarch-launch.sh: start/stop input-merge, VT blank on launch
- retroarch.cfg: ROCKNIX-based tuning (48kHz audio, triple buffer,
late input polling, autosave, core options path)
- retroarch-core-options.cfg: per-core tuning from ROCKNIX RK3326
(mupen64plus, pcsx_rearmed, flycast, mame2003-plus, melonds, etc.)
- archr-gamepad.cfg: autoconfig for merged virtual device
- panel-detect.py: panels in numerical order (beep count = position),
default_panel searches by empty dtb_name instead of panels[0]
- build-rootfs.sh: compile input-merge, install core options and
autoconfig, add input-merge and kill to sudoers
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
Users reported that non-default panel overlays caused broken display,
audio, and controls. Root cause: BSP U-Boot's fdt apply has bugs with
property replacement of different-sized data, corrupting the DTB.
Fix: apply overlays at build-time using fdtoverlay (verified working)
instead of at boot-time. Each panel now gets a pre-merged kernel-*.dtb.
U-Boot simply loads the right DTB by name — no fdt apply needed.
- generate-panel-dtbos.sh: add fdtoverlay pre-merge step
- build-image.sh: copy pre-merged DTBs instead of ScreenFiles
- boot.ini: load PanelDTB by name, remove fdt addr/resize/apply
- panel-detect.py: write DTB filename instead of DTBO overlay path
