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Add portmaster support #16

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The-Nils wants to merge 11 commits intoDantSu:mainfrom
The-Nils:feat/portmaster-platform
Draft

Add portmaster support #16
The-Nils wants to merge 11 commits intoDantSu:mainfrom
The-Nils:feat/portmaster-platform

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@The-Nils
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Hi!
I've implemented PortMaster support to allow to run Telmi on r36s like handhelds. i've done my best to separate the platform specific functions but it's my try at C code and i don't really know if it's the way to go...
Feel free to ask for change or trash my PR.

  • tested and working on: R36S and Battlexp G350 with ArkOS and Pan4elec
  • Not yet tested on Miyoo Mini

I'm keeping this as a draft PR until I can confirm the Miyoo Mini build still works as expected.

Why I made this:

  1. Cost accessibility: R36S devices are significantly cheaper than the Miyoo Mini+, making Telmi even more accessible
  2. Family use case: One of my daughters is older and I let her play select games on the handheld, so having both the player and games available without switching SD cards is really convenient for us (and i thought it could benefit to other parents )

The-Nils added 11 commits March 19, 2026 20:58
Introduces a platform abstraction layer (PAL) under src/platform/ so the
app can be built for both miyoomini (original target) and portmaster
(R36S / ArkOS / DarkOS) by setting PLATFORM= at compile time.

Platform-specific headers selected via -I../../src/platform/$(PLATFORM):
- platform_paths.h   : file paths (hardcoded on miyoomini, $GAMEDIR-based on portmaster)
- platform_brightness.h : display brightness (GPIO/PWM vs sysfs backlight)
- platform_input.h   : input events (evdev vs SDL2 game controller)

Application code is unchanged; all ifdef guards are replaced by the
include-path selection mechanism.

Also adds:
- Dockerfile.r36s + scripts/build_r36s.sh   : cross-compile for aarch64
- scripts/package_portmaster.sh             : assemble dist/portmaster/ deploy folder
- portmaster/telmi.sh + telmi.gptk          : PortMaster launcher files
- src/platform/portmaster/README.md         : build and deploy instructions
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