Re: [PATCH v2] Bluetooth: btusb: Configure altsetting for USER_CHANNEL

[Hsin-chen Chuang]

On Fri, Feb 28, 2025 at 12:47 PM Ying Hsu <yinghsu@xxxxxxxxxxxx> wrote:
>
> Beyond power concerns, another potential issue is USB host controller
> scheduling fairness. SCO data is transmitted over isochronous pipes,
> and if the alternate setting remains non-zero, the USB host controller
> reserves bandwidth even when no audio data is being transmitted. This
> could reduce throughput for some USB 1.x/2.0 applications, such as
> file transfers from USB mass storage devices, when sharing the bus
> with a Bluetooth controller in SCO mode. I don’t have a Chromebook to
> verify this theory, but I suggest the ChromeOS team measure the
> potential impact and follow up if necessary.

Thanks for the input. We will measure the potential impact.