svi-252b: document autonomous IR illuminator

[ArthurKoba]

Follow-up to #161 and #163.

The current SVI-252B K202 profile correctly leaves backlightPin unset, but the comment still describes the IR illuminator control as unresolved.

Hardware behavior confirms that the IR illumination is autonomous on this board: the daylight-sensor circuitry switches the IR LEDs directly. The SoC only observes the resulting light state on GPIO3_0 / GPIO24 and controls the bistable IR-cut filter through GPIO34/33.

There is therefore no SoC-controlled backlight GPIO to configure on this board.

This change only corrects the device-profile documentation; runtime configuration is unchanged.

The current profile was also revalidated from a clean full firmware flash with the overlay wiped: the device booted with the expected IMX323, daylight sensor, IR-cut pins and 150 ms transition delay applied automatically.

[qodo-free-for-open-source-projects]

PR Summary by Qodo

Document autonomous IR illumination for SVI-252B K202

📝 Documentation 🕐 Less than 5 minutes

AI Description

• Documents daylight-sensor circuitry as the autonomous IR illuminator controller.
• Clarifies why no SoC-controlled backlight GPIO is configured.
• Leaves device runtime configuration unchanged.

High-Level Assessment

The documentation-only approach is optimal because the existing unset backlightPin already matches confirmed hardware behavior. Adding a GPIO configuration would incorrectly imply SoC control of the autonomous illuminator.

Files changed (1) +3 / -2

Documentation (1) +3 / -2

customizer.shClarify autonomous IR illuminator behavior +3/-2

Clarify autonomous IR illuminator behavior

• Replaces the unresolved-control comment with confirmed hardware behavior: daylight-sensor circuitry switches the IR LEDs autonomously, while the SoC observes light state and controls only the IR-cut filter. Runtime environment configuration remains unchanged.

devices/hi3516cv200_lite_spezvision-svi-252b-k202/general/overlay/usr/share/openipc/customizer.sh

[qodo-free-for-open-source-projects]

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