Re: [PATCH v3 1/2] dt-bindings: phy: qcom: Add CSI2 C-PHY/DPHY schema
From: Konrad Dybcio
Date: Wed Mar 04 2026 - 05:37:16 EST
On 3/3/26 3:56 PM, Bryan O'Donoghue wrote:
> On 03/03/2026 12:34, Konrad Dybcio wrote:
>> That depends on the use case.
>>
>> MXA is always-on (that's the 'A' in the name, as opposed to 'C'
>> for 'Collapsible'), but it's not always at the required performance
>> state (svs, nom, etc.). For some clock controllers specifically, there
>> is no need to put them into the picture, as the rail may be unconnected
>> altogether, or only used for some retention mechanisms (which only
>> require the rail to be enabled and nothing more)
>
> Does this rail have an OPP table you can share ?
Camera clocks on X1 (mclks and the fixed PLL2, which is exclusively used
to derive MCLKs) that potentially depend on this rail (awaiting Taniya's
opinion on the other thread [1]) would only need LOWSVS_D1 for all of
their configurations (ftbl_cam_cc_mclk0_clk_src[])
i.e. let's wait for a definitive answer as there's a lot of layers..
[1] https://lore.kernel.org/linux-arm-msm/382725b5-1e72-44b2-b9ae-38aea1f7a976@xxxxxxxxxxxxxxxx/
Konrad