Hi,
Ruslan Bilovol <[email protected]> writes:
> On Tue, Nov 7, 2017 at 3:52 AM, Ruslan Bilovol <[email protected]> wrote:
>> Hi,
>>
>> This patch adds USB Audio Device Class 3.0 [1] function
>> support to gadget subsystem.
>> I didn't add UAC3 support to legacy gadget as it will
>> make preprocessor configuration too complex (UAC3 device
>> must have two configurations for backward compatibility,
>> first is UAC1/2 and second is UAC3), yet also I'm too lazy
>> to do that and verify all possible configurations.
>>
>> For modern ConfigFS interface I'll provide my configuration
>> for testing below; testing was done on a BeagleBone Black
>> board.
>>
>> This patch depends on uac3 header files from include dir
>> which I'll post as part of ALSA host UAC3 patch and will
>> provide the link to it here.
>
> http://www.spinics.net/lists/alsa-devel/msg69071.html
Once that patch hits upstream, then we can queue this for merge window
otherwise we will just have issues and create unbisectable points in the
tree.
--
balbi
Hi Felipe,
On Mon, Dec 4, 2017 at 1:36 PM, Felipe Balbi <[email protected]> wrote:
>
> Hi,
>
> Ruslan Bilovol <[email protected]> writes:
>> On Tue, Nov 7, 2017 at 3:52 AM, Ruslan Bilovol <[email protected]> wrote:
>>> Hi,
>>>
>>> This patch adds USB Audio Device Class 3.0 [1] function
>>> support to gadget subsystem.
>>> I didn't add UAC3 support to legacy gadget as it will
>>> make preprocessor configuration too complex (UAC3 device
>>> must have two configurations for backward compatibility,
>>> first is UAC1/2 and second is UAC3), yet also I'm too lazy
>>> to do that and verify all possible configurations.
>>>
>>> For modern ConfigFS interface I'll provide my configuration
>>> for testing below; testing was done on a BeagleBone Black
>>> board.
>>>
>>> This patch depends on uac3 header files from include dir
>>> which I'll post as part of ALSA host UAC3 patch and will
>>> provide the link to it here.
>>
>> http://www.spinics.net/lists/alsa-devel/msg69071.html
>
> Once that patch hits upstream, then we can queue this for merge window
> otherwise we will just have issues and create unbisectable points in the
> tree.
Takashi promised to create an immutable branch for that purpose.
However, I'm currently reworking configfs part of UAC3 for channels
configuration handling, which is now more clear after sharing missing
parts of UAC3 spec by Pierre-Louis Bossart during host side patches
review; so I will send v2 soon.
Thanks,
Ruslan
On Thu, Dec 7, 2017 at 1:18 PM, Ruslan Bilovol <[email protected]> wrote:
> Hi Felipe,
>
> On Mon, Dec 4, 2017 at 1:36 PM, Felipe Balbi <[email protected]> wrote:
>>
>> Hi,
>>
>> Ruslan Bilovol <[email protected]> writes:
>>> On Tue, Nov 7, 2017 at 3:52 AM, Ruslan Bilovol <[email protected]> wrote:
>>>> Hi,
>>>>
>>>> This patch adds USB Audio Device Class 3.0 [1] function
>>>> support to gadget subsystem.
>>>> I didn't add UAC3 support to legacy gadget as it will
>>>> make preprocessor configuration too complex (UAC3 device
>>>> must have two configurations for backward compatibility,
>>>> first is UAC1/2 and second is UAC3), yet also I'm too lazy
>>>> to do that and verify all possible configurations.
>>>>
>>>> For modern ConfigFS interface I'll provide my configuration
>>>> for testing below; testing was done on a BeagleBone Black
>>>> board.
>>>>
>>>> This patch depends on uac3 header files from include dir
>>>> which I'll post as part of ALSA host UAC3 patch and will
>>>> provide the link to it here.
>>>
>>> http://www.spinics.net/lists/alsa-devel/msg69071.html
>>
>> Once that patch hits upstream, then we can queue this for merge window
>> otherwise we will just have issues and create unbisectable points in the
>> tree.
>
> Takashi promised to create an immutable branch for that purpose.
>
> However, I'm currently reworking configfs part of UAC3 for channels
> configuration handling, which is now more clear after sharing missing
> parts of UAC3 spec by Pierre-Louis Bossart during host side patches
> review; so I will send v2 soon.
OK, so now we have both UAC3 initial support patches [1] and
also UAC3 BADD profiles support [2] in Torvalds tree, and I'm going
to refresh this patch series and send v2 soon (perhaps in next few weeks)
[1]: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=9a2fe9b801f585baccf8352d82839dcd54b300cf
[2]: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=17156f23e93c0f59e06dd2aaffd06221341caaee
Thanks,
Ruslan