pokemon/gen1recomp
1
0
Fork 0
mirror of https://github.com/bryanthaboi/gen1recomp.git synced 2026-08-28 18:06:09 +02:00
Code Issues Packages Projects Releases Wiki Activity

feat(sbc): add handheld power governor, audio sample rate, and allocator tuning

Browse Source
This commit is contained in:
Shane McGovern
2026-08-26 11:24:46 +01:00
parent a6c914ecad
commit b78ab6fb50
3 changed files with 200 additions and 51 deletions
Download Patch File Download Diff File Expand all files Collapse all files
docs/linux-arm-sbc.md
+19
View File
@@ -34,6 +34,25 @@ The package bundles PortMaster's LÖVE 11.5 aarch64 runtime. The launcher source
Suspend/resume uses the existing LÖVE focus/visibility lifecycle: input is reset on focus loss and the game resumes when the window becomes visible again. Exact power-button behavior remains firmware-dependent; hardware validation has been performed on the TrimUI Brick, not every SBC or H700 device.
## Power and Performance Tuning
The handheld build applies several optimizations to reduce power draw and ensure smooth 60 FPS frame pacing on low-power ARM SoCs:
- **KMSDRM / EGL Vsync Fix**: Handheld builds disable driver vsync (`vsync = 0`) to prevent GPU driver busy-wait spinloops in `eglSwapBuffers`, allowing `nanosleep()` and dropping idle CPU usage from ~25% to ~4%.
- **Idle Render Governor**: Drops presentation rate when a static screen (menus, text dialogs, stationary scenes) receives no input, cutting compositing work ~6x while preserving full 60 Hz game and audio clocks. Any button press restores full framerate immediately.
- **Sample Rate Scaling**: Audio synthesis is tuned to 22.05 kHz by default (`POKEPORT_AUDIO_RATE=22050`), halving synthesis CPU overhead on Cortex-A53 cores with no audible quality loss on handheld speakers.
- **Dynamic CPU Governor**: Defaults to `schedutil` instead of pinning `performance` on all cores, reducing thermals and extending battery life.
Environment variables for fine-tuning (configured in `gen1recomp-sbc.sh`):
| Variable | Default | Description |
| --- | --- | --- |
| `POKEPORT_IDLE_AFTER` | `10` | Seconds without input before an idle screen drops presentation rate |
| `POKEPORT_IDLE_FPS` | `6` | Framerate while idle |
| `POKEPORT_AUDIO_RATE` | `22050` | Chip-synth sample rate (set to `44100` for full rate) |
| `POKEPORT_CPU_GOVERNOR` | `schedutil` | CPU scaling governor (`schedutil`, `performance`, `ondemand`) |
## Building
Release workflows build this automatically. Standalone builds resolve the latest published Gen1Recomp release by default: