RE: [PATCH v2 RESEND] drivers/usb: Skip auto handoff for TI and RENESAS usb controllers

From: Yoshihiro Shimoda
Date: Mon Oct 24 2016 - 06:54:46 EST


Hi,

> From: Mathias Nyman
> Sent: Monday, October 24, 2016 6:58 PM
>
> On 22.10.2016 01:25, Babu Moger wrote:
> > Never seen XHCI auto handoff working on TI and RENESAS cards.
> > Eventually, we force handoff. This code forces the handoff
> > unconditionally. It saves 5 seconds boot time for each card.
> >
> > Signed-off-by: Babu Moger <babu.moger@xxxxxxxxxx>
>
> Do the Renesas and TI controllers still advertise the extended capability
> for the handoff? (XHCI_EXT_CAPS_LEGACY)
>
> Is this some known issue with these vendors controllers? Is there some documentation
> about this, errata or anything?
>
> Adding Yoshihiro Shimoda, he might know about the Renesas controller.

Thank you for adding me on this email.
However, unfortunately I don't know the detail about Renesas PCIe xHCI controllers.
(I know the xHCI controller of R-Car SoCs for now.)

Best regards,
Yoshihiro Shimoda