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

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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>





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