DT510: HDMI — LT9611 + GPIOs / display path (Tier C3)

[ajlennon]

Parent tracking

Sub-issue of #2 (DT510 BSP bring-up plan).

Scope (Tier C3)

Enable HDMI output via Lontium LT9611 (I2C3, 7-bit 0x39 per DTS; SSOT may quote 8-bit 0x72).

Current state

• Node: lt9611@39, compatible = "lontium,lt9611" — status = "disabled" until probe + pinctrl validated.
• Related: HDMI2C1-6C1 fault line and reset/int GPIOs per SSOT — align when enabling codec bridge.

Work

• Wire reset / interrupt / fault GPIOs from SSOT; resolve any pinctrl clashes (plan warns: shared pins with Wi‑Fi wake etc. — needs schematic sign-off).
• Verify kernel driver match (lt9611 / lt9611uxc — confirm binding vs silicon revision).
• Integrate with display pipeline (MIPI/DSI or SoC path per design — follow NXP + panel docs).
• Acceptance: display path works on hardware; no regressions to unrelated GPIO/USB.

References

• docs/DT510-BSP-PROJECT-PLAN.md §5 C3

Assignees

Per parent #2: @ajlennon @ohull456