device: add AYANEO Pocket S Mini support

[mydanyi]

Summary

Add ROCKNIX support for the AYANEO Pocket S Mini (SM8550).

This includes:

• a device tree for the 1280x960 AR16 panel, CST66xx touchscreen, panel/backlight power rails, and the two GPIO buttons;
• AR16 panel and Hynitron CST66xx touchscreen drivers;
• InputPlumber support for the built-in controller, AYANEO/Guide button, and quick-access button;
• reuse of the existing Pocket S 2K device quirks;
• an opt-in ath12k device-tree quirk for Wi-Fi scan failures after 11d offload;
• 180-degree Steam/Gamescope display handling and matching touch calibration.

The Pocket S Mini uses the swapped AYANEO MCU capability map to normalize its raw face-button events to the Xbox-style prompts shown by ROCKNIX.

Testing

• Built the SM8550 Linux package and qcs8550-ayaneo-pocketsmini.dtb with the ROCKNIX Docker build environment.
• After the review update, reapplied the SM8550 kernel patch series, rebuilt ath12k/mac.o and the Pocket S Mini DTB, and confirmed the new property in the final DTB.
• Compiled the AR16 panel driver, CST66xx touchscreen driver, ath12k module, kernel image, modules, and perf.
• Parsed the InputPlumber YAML and config.xml, checked the Steam launcher with bash -n, and ran Git whitespace checks.
• Booted ROCKNIX on a retail Pocket S Mini from both SD card and internal storage.
• Tested the display, backlight, touchscreen, built-in controls, Guide and quick-access buttons, force feedback, audio, Steam/Gamescope, and Wi-Fi reconnect/scan behavior.
• Deployed the final model-gated InputPlumber profile and verified A/B/X/Y against the on-screen prompts in both ROCKNIX and Steam.

Known Limitations

• The LC and RC buttons are not mapped yet and will be handled in follow-up work.

Additional Context

• The CST66xx is enumerated at I2C address 0x5a; its runtime report protocol uses address 0x58, matching the stock device behavior.
• The 11d workaround is opt-in through qcom,skip-11d-scan-offload; only the Pocket S Mini DTS enables it.
• The Steam touch rule is limited to the Pocket S Mini, the CST66xx input device, and the 180-degree orientation, and is removed when the Gamescope session exits.

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AI Usage

Did you use AI tools to help write this code? YES

[xiaodoudou]

@mydanyi you can try on your local build my PR #3189 which should resolve the issue you did encounter and should patch the 11d feature for the AYANEO too.

[mydanyi]

Updated as requested.

The workaround is now selected by the qcom,skip-11d-scan-offload property on the Pocket S Mini Wi-Fi node. The ath12k code no longer checks the root model string.

I built the updated ath12k module and DTB from commit 7423047 and tested them on a retail AYANEO Pocket S Mini:

• cold boot succeeded, the DT property was present, and ath12k logged skipping 11d scan offload
• connected to a 5 GHz network at 160 MHz
• repeated scans continued to return both 2.4 GHz and 5 GHz networks
• three disconnect/reconnect cycles reconnected on 5 GHz
• no WMI_SCAN_EVENT_START_FAILED was observed

The device is currently running this revision.

[loki666]

@mydanyi resolve conflicts please

[mydanyi]

@loki666 Done. I rebased the PR onto the latest next and resolved the start_steam.sh conflict. GitHub now reports the PR as mergeable.

[loki666]

@tiopex can you review the changes for start_steam.sh

[tiopex]

+1

[mydanyi]

@loki666 @spycat88 Could you also review ROCKNIX/emulationstation-next#28 when you have a chance? It adds the Simplified Chinese localization, and the merge conflicts have now been resolved with the branch updated to the latest master. Thanks!

[loki666]

Thanks

[mydanyi]

@loki666 @spycat88 Follow-up font support is now in #3235. It installs Noto Sans CJK SC system-wide for Steam and uses the same font for the Chinese EmulationStation UI. This complements the Pocket S Mini support here and ROCKNIX/emulationstation-next#28.