Re: [PATCH 1/4] dt-bindings: display: panel: himax,hx8279: add vddp-supply

[Conor Dooley]

On Tue, Oct 06, 2026 at 03:25:01PM -0500, David Lechner wrote:
> Add a vddp-supply property and make it required for the Startek
> KD070FHFID078 panel.
> 
> The Startek KD070FHFID078 panel has a separate VDDP power input, which
> feeds its DC-DC converter, in addition to VDD and IOVCC. On the MediaTek
> Genio 520 and 720 EVKs, VDDP is switched by its own GPIO-controlled
> regulator, and on the Genio 1200 EVK it comes from its own PMIC LDO.
> In both cases it is separate from the other two supplies, so it needs to
> be described to power the panel.
> 
> Making it required means existing device trees with this panel without
> it no longer validate. This is ok since the Linux driver will still work
> with them because the regulator core uses a dummy regulator for any
> missing supply. And anyone who sees the warning about the missing
> supply should add it to their device tree.
> 
> It stays optional for the Aoly SL101PM1794FOG-V15 panel, as it is not
> known whether that panel has a VDDP input.

Acked-by: Conor Dooley <conor.dooley@xxxxxxxxxxxxx>
pw-bot: not-applicable

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