Re: [PATCH v4 02/16] dt-bindings: display/msm: hdmi: drop hpd-gpios

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On Tue, Feb 11, 2025 at 09:26:31AM +0100, Krzysztof Kozlowski wrote:
> On Sun, Feb 09, 2025 at 07:04:46AM +0200, Dmitry Baryshkov wrote:
> > Supporting simultaneous check of native HPD and the external GPIO proved
> > to be less stable than just native HPD. Drop the hpd-gpios from the
> > bindings. This is not a breaking change, since the HDMI block has been
> > using both GPIO _and_ internal HPD anyway. In case the native HPD
> > doesn't work users are urged to switch to specifying the hpd-gpios
> > property to the hdmi-connector device.
> 
> In that case users would need to update their DTS/DTB, so that's an ABI
> break.
> 
> Please deprecate the property here (deprecated: true) and keep support
> in the driver.

I will expand the explanation for the need of the ABI break. Yes, it's a
bad idea. No, it doesn't prevent the board from working. Yes, it needs
to be done.

-- 
With best wishes
Dmitry




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