[alsa-devel] Applied "ASoC: Intel: add bytct-rt5651 machine driver" to the asoc tree

[Pierre-Louis Bossart]

On 6/1/16 4:43 PM, Pietro wrote:
> Hi,
>
> Sorry for the wrong information:
> the 2 DSDTs were decompiled using different iasl versions (20140828 for Android vs 20150717 for Linux), giving apparently different results (the functions were decoded differently, but the keys were the same).
>
> The tablet is a dual boot Windows+Android (Surely based on AndroidIA, with a Patched gmin kernel... Obviously the sources were not provided by the manifacturer).
>
> I've made some tests using both the firmware included in Android, and the upstream ones, with no apparent results (Always slow Audio).
>
> But when you suggested me to use the fw_sst_22a8.bin I was trying to load the Android one, giving me load errors. Now I've tried the upstream one and it works with correct timing settings (!!)
>
> Then I've tried to restore the 4.5.2 stock bytcr_rt5651.c, but this gave me inconsistent playback: The speed was right, but there were continue audio artifacts (like the ones given by a bad resampler, to give you an idea).
> Using the patched driver, following your suggestion (patching it exatcly as I've wrote in the past E-Mails), solved this issue, so now the Audio is correctly played.
>
> In the following days I'll make some tests (For example audio recording, switch between Headset and Speakers Etc.) and let you know if I'll find other issues.
>
> Thanks for your continuous support, I've really appreciated it.

Good to hear!
Yes as a general rule mixing upstream drivers with Android firmware and 
vice-versa is not a good idea, and using the MCLK is the only way to 
solve audio quality issues, it's however not enabled on every board 
unfortunately. When we have the clock driver I will make this the 
default and use quirks to go back to bit-clock based PLL configs.
If you want to send me a patch I can merge it with the rest of Baytrail 
cleanups still being worked on.

>
> Pietro
>
>
> On Wednesday 01 June 2016 10:13:17 Pierre-Louis Bossart wrote:
>> On 6/1/16 3:38 AM, Pietro wrote:
>>> Hi,
>>>
>>>
>>>
>>> The Kernel error messages should be related to the Intel DRM graphics,
>>> so I don't care about them (at least for now).
>>>
>>>
>>>
>>> Anyway I don't know if tese warning can in some way be related to my
>>> problem:
>>>
>>>
>>>
>>> [ 9.565990] rt5651 i2c-10EC5651:00: ASoC: mux INL1 Mux has no paths
>>>
>>> [ 9.586586] rt5651 i2c-10EC5651:00: ASoC: mux INR1 Mux has no paths
>>>
>>> [ 9.586596] rt5651 i2c-10EC5651:00: ASoC: mux INL2 Mux has no paths
>>>
>>> [ 9.586601] rt5651 i2c-10EC5651:00: ASoC: mux INR2 Mux has no paths
>>
>> probably the config is incorrect, I didn't enable capture in the UCM file
>>
>>>
>>> [ 12.646035] sst-mfld-platform sst-mfld-platform: Slot control:
>>> codec_out tx interleaver slot 0 doesn't have DAPM widget!!!
>>>
>>> [ 12.649356] sst-mfld-platform sst-mfld-platform: Slot control:
>>> codec_out tx interleaver slot 1 doesn't have DAPM widget!!!
>>>
>>> [ 12.652673] sst-mfld-platform sst-mfld-platform: Slot control:
>>> codec_out tx interleaver slot 2 doesn't have DAPM widget!!!
>>>
>>> [ 12.656323] sst-mfld-platform sst-mfld-platform: Slot control:
>>> codec_out tx interleaver slot 3 doesn't have DAPM widget!!!
>>>
>>> [ 12.659868] sst-mfld-platform sst-mfld-platform: Slot control: codec_in
>>> rx deinterleaver codec_in0_0 doesn't have DAPM widget!!!
>>>
>>> [ 12.663456] sst-mfld-platform sst-mfld-platform: Slot control: codec_in
>>> rx deinterleaver codec_in0_1 doesn't have DAPM widget!!!
>>
>> this last warning is fixed upstream.
>>
>>> For your convenience I've extracted the DSDT from Android and Linux,
>>> because they seem to differ. Here they are:
>>>
>>>
>>>
>>> DSDT Linux: http://paste.ubuntu.com/16885538/
>>>
>>> DSDT Android: http://paste.ubuntu.com/16885557/
>>
>> DSDT is OS independent so that doesn't make sense.
>> Just to be clear, is this an Android tablet on which you are installing
>> ubuntu?
>> And did you try to use the firmware from upstream or from the Android
>> distribution?
>>
>>
>
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