cec_mini_kb : cec-mini-kb.service is started 1 time only when retroarch.service is activated

[ShigeakiAsai]

This pull request concerns with issue #1981

Current (Lakka-v5.x) cec-mini-kb.service is always restarted even if it is failed. If CEC unsupported HDMI display is connected, the framerate hiccups is happened by each cec-mini-kb.service restarts. It needs to control the cec-mini-kb.service starting.

Idea for fix

At first, please refer systemd.service manual. https://www.freedesktop.org/software/systemd/man/latest/systemd.service.html Give "cec-mini-kb.service" to depend "retroarch.service". When the systemd detects "retroarch.service" was normally started, it starts "cec-mini-kb.service". The "cec-mini-kb.service" is started 1 time only.

Changing detail

• retroarch.service Change service type to "notify".
• retroarch Notifies "Ready" to systemd via sd_notify() when initialize is done.
• cec-mini-kb package Update package revision.
• cec-mini-kb.service (a) Give "After=retroarch.service" and "Requires=retroarch.service" dependencies in [Unit] section. (b) Change to "WantedBy=retroarch.service" from "WantedBy=multi-user.target" in [Install] section. (c) Remove "RestartSec=2" and creplace "Restart=no" from "Restart=always" in [Service] section. By (a) and (b), the systemd starts "cec-mini-kb.service" after "retroarch.service" is activated. By (c), the systemd only start s "cec-mini-kb.service" 1 time.

Limitation:

• When HDMI display is not recognized or not connected in Lakka booting, "cec-mini-kb.service" is failed after reconnect HDMI display.

Request:

I placed "sd_notify()" into rarch_main() on retroarch. Please let me know more good place.

Thanks ASAI, Shigeaki

[ToKe79]

Thank you. This looks good to me.

[ShigeakiAsai]

I confirmed the following on Lakka-RPi4.aarch64-5.x-20240622-63ed9e5.img.gz

• cec-mini-kb is started and TV's remote controller is working on RPi4 + TV.
• cec-mini-kb is failed 1 time only on RPi4 + PiCade display.

This is the intended behavior.

Thanks ASAI, Shigeaki