Re: [edk2-devel] [PATCH edk2-platforms WIP 0/5] Provide EHCI or XHCI USB controller

["Marcin Juszkiewicz" <marcin.juszkiewicz@linaro.org>]

W dniu 13.10.2023 o 15:24, Gerd Hoffmann pisze:

>> So two solutions came to my mind:
>>
>> 1. rewrite DSDT generation into C
> 
> You might want have a look at DynamicTablesPkg/ for that

Wasn't is involving using ConfigurationManager? Or maybe I just had 
wrong assumption after reading code.
>> 2. provide EHCI/XHCI in SSDT table instead of DSDT
> 
> Should work, except that I'd suggest to worry about xhci only.
> ehci never actually worked anyway, so why advertise it to the OS in the
> first place?

Good point.

> 3. Add a _STA AML function to the XHCI DSDT description, which is able
> to figure whenever XHCI is present.
> 
> We had that in qemu years ago, before switching to full DSDT generation,
> where the _STA functions checked some bit in PCI config space of the ISA
> bridge to figure whenever specific isa devices (floppy, serial/parallel
> port) are present or not.
Will look.

Thanks.


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