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SubjectRe: [PATCH v2 RESEND] drivers/usb: Skip auto handoff for TI and RENESAS usb controllers
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On 10/25/2016 1:51 AM, Mathias Nyman wrote:
> On 24.10.2016 17:52, Babu Moger wrote:
>>
>> On 10/24/2016 5:54 AM, Yoshihiro Shimoda wrote:
>>> 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@oracle.com>
>>>> Do the Renesas and TI controllers still advertise the extended
>>>> capability
>>>> for the handoff? (XHCI_EXT_CAPS_LEGACY)
>> I don't see this capability. Here is lspci output.
>>
>
> It's not a PCI capability, it's a xhci Extended Capability.
>
> If the capability is supported, and handoff fail, then
> quirk_usb_handoff_xhci() will print
> "xHCI BIOS handoff failed (BIOS bug ?)"
>

Yes. I see these messages. After this patch I don't see these messages.

> Further on in the same function we wait for the "controller not ready"
> bit in the status
> register to clear. If that times it prints out:
>
> "xHCI HW not ready after 5 sec (HC bug?) status"

No. I didn't see this messages.

>
> Do you see any of these two messages in the log?
>
> -Mathias

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