On Tue, 6 Jun 2023 at 10:47, Marcin Juszkiewicz <marcin.juszkiew...@linaro.org> wrote: > > W dniu 5.06.2023 o 11:55, Yuquan Wang pisze: > > The current sbsa-ref cannot use EHCI controller which is only > > able to do 32-bit DMA, since sbsa-ref doesn't have RAM below 4GB. > > Hence, this uses XHCI to provide a usb controller with 64-bit > > DMA capablity instead of EHCI. > > > > Signed-off-by: Yuquan Wang<wangyuquan1...@phytium.com.cn> > > Reviewed-by: Marcin Juszkiewicz <marcin.juszkiew...@linaro.org> > > Without EDK2 changes Linux behaves same way (no USB found), with EDK2 > changes (EHCI->XHCI) Linux gets USB devices.
So it doesn't break (cause to crash) old EDK2 images? That's a pleasant surprise. -- PMM
