linux-kernel - Re: no sound on Meegopad T02 with 4.3 kernel

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Message-ID: <CAC3zGv94OG-2kVSxC_35i-O+nWuZBr7GS-STE4BN7F8yiBVVPQ@mail.gmail.com>
Date:	Mon, 16 Nov 2015 18:16:46 +0300
From:	Alexey Mednyy <swexru@...il.com>
To:	Jamin Collins <jamin.collins@...il.com>
Cc:	linux-kernel@...r.kernel.org,
	Jarkko Nikula <jarkko.nikula@...ux.intel.com>,
	Jie Yang <yang.jie@...el.com>,
	Oder Chiou <oder_chiou@...ltek.com>,
	Mark Brown <broonie@...nel.org>,
	Bard Liao <bardliao@...ltek.com>,
	Steven Noonan <steven@...inklabs.net>
Subject: Re: no sound on Meegopad T02 with 4.3 kernel

I'm also interesting in baytrail sound solution. I've heard that Asus
T100A sound is working.
However I still can't stable kernel. Even with patches from [3] link
my Asus m80ta just hangs without any dmesg.
_________________________________
Best regards, Mednyy Alexey.


On Fri, Nov 13, 2015 at 3:32 AM, Jamin Collins <jamin.collins@...il.com> wrote:
> I'm having trouble getting sound working on a Meegopad T02[1]. I'm
> running Arch with a 4.3 kernel[2] with patches[3] for wifi stability.
>
> So far, the drivers appear to load, but produce the following dmesg output:
>
>> [    5.579629] baytrail-pcm-audio baytrail-pcm-audio: ipc: error DSP boot timeout
>> [    5.579841] byt-rt5640 byt-rt5640: ASoC: CPU DAI baytrail-pcm-audio not registered
>
> No devices are listed in the output from 'aplay -l' (presumably due to
> the above):
>
>> $ aplay -l
>> aplay: device_list:268: no soundcards found...
>
> I've tried alternative firmware[4], but still get output like the above.
>
> The system is a Baytrail compute stick (similar to Intel's Compute
> Stick) and supports both HDMI audio and analog jack.
>
> There appears to be a patch from Intel[5], but it's monolithic and
> targetted toward a much older kernel.  It's also a bit unclear if any
> of the patches were ever upstreamed.
>
> Am I doing something obviously wrong here? If not, are there any
> patches I can try to get this thing working?
>
>
> [1] - http://x86pad.com/t02.html
> [2] - http://git.uplinklabs.net/snoonan/projects/archlinux/ec2/ec2-packages.git/plain/linux-ec2/config.x86_64?id=0ca66a09e18e7294c9cf9a6df5b79247781e0c12
> [3] - http://git.uplinklabs.net/snoonan/projects/archlinux/ec2/ec2-packages.git/commit/?id=0ca66a09e18e7294c9cf9a6df5b79247781e0c12
> [4] - https://git.kernel.org/cgit/linux/kernel/git/vkoul/firmware.git/tree/intel
> [5] - https://github.com/01org/baytrailaudio/blob/master/hdmi_audio_20150319.patch
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