Re: [PATCH 2/2] arm64: dts: qcom: sm8550: Additionally manage MXC power domain in camcc

Dmitry Baryshkov
2025-03-04T08:40:46Z

On Tue, 4 Mar 2025 at 09:37, Vladimir Zapolskiy
<vladimir.zapolskiy@linaro.org> wrote:
>
> On 3/4/25 01:53, Dmitry Baryshkov wrote:
> > On Tue, Mar 04, 2025 at 12:55:21AM +0200, Vladimir Zapolskiy wrote:
> >> SM8550 Camera Clock Controller shall enable both MXC and MMCX power
> >> domains.
> >
> > Are those really required to access the registers of the cammcc? Or is
> > one of those (MXC?) required to setup PLLs? Also, is this applicable
> > only to sm8550 or to other similar clock controllers?
>
> Due to the described problem I experience a fatal CPU stall on SM8550-QRD,
> not on any SM8450 or SM8650 powered board for instance, however it does
> not exclude an option that the problem has to be fixed for other clock
> controllers, but it's Qualcomm to confirm any other touched platforms,

Please work with Taniya to identify used power domains.

> for instance x1e80100-camcc has it resolved right at the beginning.
>
> To my understanding here 'required-opps' shall also be generalized, so
> the done copy from x1e80100-camcc was improper, and the latter dt-binding
> should be fixed.

Yes

--
With best wishes
Dmitry