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Subject: Re: [edk2-devel] EFI_AUDIO_OUTPUT_PROTOCOL: assistance with VirtIO initialization
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From: "Michael Brown" <mcb30@ipxe.org>
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Date: Tue, 6 Jul 2021 13:53:44 +0100
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On 02/07/2021 19:22, Ethin Probst wrote:
> Update: I just realized I'd made a typo -- the unknown request is
> actually a get_min request.
> 
> On 7/2/21, Ethin Probst <harlydavidsen@gmail.com> wrote:
>> Setup Data
>>      bmRequestType: 0xa1
>>          1... .... = Direction: Device-to-host
>>          .01. .... = Type: Class (0x1)
>>          ...0 0001 = Recipient: Interface (0x01)
>>      bRequest: 130
>>      wValue: 0x0201
>>      wIndex: 1536 (0x0600)
>>      wLength: 2

That doesn't immediately make sense to me in the context of reading 
sections 5.2.1.2 and 5.2.2.2.2 of the audio spec, but feel free to post 
the whole wireshark capture (off-list!) and I can take a look.

Michael