linux-kernel - Re: [PATCH 0/4] add xhci hooks for USB offload

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Date:   Fri, 22 Jan 2021 17:32:58 +0200
From:   Mathias Nyman <mathias.nyman@...ux.intel.com>
To:     Howard Yen <howardyen@...gle.com>,
        Mathias Nyman <mathias.nyman@...el.com>
Cc:     gregkh@...uxfoundation.org, robh+dt@...nel.org,
        linux-usb@...r.kernel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH 0/4] add xhci hooks for USB offload

On 20.1.2021 12.04, Howard Yen wrote:
> On Tue, Jan 19, 2021 at 8:47 PM Mathias Nyman <mathias.nyman@...el.com> wrote:
>>
>> On 19.1.2021 12.10, Howard Yen wrote:
>>> To let the xhci driver support USB offload, add hooks for vendor to have
>>> customized behavior for the initialization, memory allocation, irq work, and
>>> device context synchronization. Detail is in each patch commit message.
>>
>> Is this related to the usb audio sideband capability that was added to the xHCI specification?
>> If yes, then we should probably implement the generic parts first, and then add
>> the vendor specific hooks.
>>
>> -Mathias
>>
>>
> 
> This is for offloading, no matter what type of offloading.
> I made the hooks generically and can be used for usb audio on the xhci
> which is not including the usb audio sideband capability.
> 

Ok, before adding hooks like this I think we need to see how they are used.
Do you have the rest of the patches that go on top of this series?

Maybe it could make sense to use overrides for the functions in struct hc_driver
instead in some cases? There is support for that already.

Thanks
-Mathias