Re: [PATCH 3/6] media: dt-bindings: mediatek,vcodec: Remove VDEC_SYS for mt8183

[AngeloGioacchino Del Regno]

Il 05/06/23 18:20, Nícolas F. R. A. Prado ha scritto:
> The binding expects the first register space to be VDEC_SYS. But on
> mt8183, which uses the stateless decoders, this space is used only for
> controlling clocks and resets, which are better described as separate
> clock-controller and reset-controller nodes.
>
> In fact, in mt8173's devicetree there are already such separate
> clock-controller nodes, which cause duplicate addresses between the
> vdecsys node and the vcodec node. But for this SoC, since the stateful
> decoder code makes other uses of the VDEC_SYS register space, it's not
> straightforward to remove it.
>
> In order to avoid the same address conflict to happen on mt8183,
> since the only current use of the VDEC_SYS register space in
> the driver is to read the status of a clock that indicates the hardware
> is active, remove the VDEC_SYS register space from the binding and
> describe an extra clock that will be used to directly check the hardware
> status.
>
> Also add reg-names to be able to tell that this new register schema is
> used, so the driver can keep backward compatibility.
>
> Signed-off-by: Nícolas F. R. A. Prado <nfraprado@xxxxxxxxxxxxx>

Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@xxxxxxxxxxxxx>