Re: [PATCH v13 05/10] usb: dwc3: qcom: Refactor IRQ handling in QCOM Glue driver

[Krishna Kurapati PSSNV]

Hi Johan,

> Are you sure there's no support for hs_phy_irq also in the "femto" PHYs
> and that it's just that there is currently no driver support for using
> them?
>
> And why is it defined if there is truly no use for it?

We had an internal sync up with HW folks and here is some baseline 
suggestions we received:

If DP/DM interrupts are defined, then that is the preferred path to 
used, irrespective if HS Phy irq is defined or not / or whether it is 
Femto / QUSB2 target. There is no target that has femto phy but misses 
DP/DM today.

For cases like sdm660/msm8998/msm8953/msm8956, these targets use 
hs_phy_irq only and don't rely on DP/DM. So we cannot remove the binding 
in entirety.

> Also, if hs_phy_irq and dp/dm_phy_irq were mutually exclusive, why does
> the following Qualcomm SoCs define all three?

HS Phy Irq is redundant or functionality is mutually exclusive in this 
case. If there are targets that define all three, then we need to update 
those to only utilize DP/DM interrupts.

Regards,
Krishna,