Re: [PATCH v3 1/5] dt-bindings: media: qcom,sm8550-iris: Add X1P42100 compatible

[Krzysztof Kozlowski]

On Thu, Mar 19, 2026 at 05:23:53PM +0800, Wangao Wang wrote:
> Document the new compatible string "qcom,x1p42100-iris".
> 
> The hardware shares the same IP block and binding as SM8550, but is
> described by a separate compatible string due to differences in the
> clock topology.

It would be described by a separate compatible even if clock topology
was identical, so false implication. Drop the incorrect part and just
describe the hardware.

> 
> In particular, x1p42100 adds an additional clock for the Bitstream
> Engine (BSE), which is not present on SM8550. This clock requires
> explicit enable/disable handling and frequency configuration, so it
> cannot fall back to sm8550.

So same IP block implies devices are compatible, but you say they are
not. How is the BSE clock handled in SM8550 in such case?


Best regards,
Krzysztof