Created attachment 180601 [details]
lspci

Created attachment 180611 [details]
sys dir list

Created attachment 180621 [details]
decompiled dsdt

Created attachment 180631 [details]
lsmod

Created attachment 180721 [details]
dmesg of 4.1 kernel

Dmesg after booting into 4.1 kernel with ubuntu patches - not rc


[    7.404271] i2c_designware 80860F41:03: i2c_dw_handle_tx_abort: lost arbitration
[    7.408430] dw_dmac INTL9C60:00: DesignWare DMA Controller, 8 channels
[    7.409119] dw_dmac INTL9C60:01: DesignWare DMA Controller, 8 channels
[    7.787505] byt-rt5640 byt-rt5640: ASoC: CPU DAI baytrail-pcm-audio not registered
[    7.809259] byt-rt5640 byt-rt5640: ASoC: CPU DAI baytrail-pcm-audio not registered
[    7.809593] byt-rt5640 byt-rt5640: ASoC: CPU DAI baytrail-pcm-audio not registered
[    8.021191] byt-rt5640 byt-rt5640: ASoC: CPU DAI baytrail-pcm-audio not registered
[    8.039259] (NULL device *): ipc: error DSP boot timeout

Created attachment 180731 [details]
kernel config

Kernel Config used for 4.1 kernel

As per the log messages it looks that 
resindex_dma_base is not set to -1. 

But in Baytrail it is set to -1.

check the value of resindex_dma_base in your case and update here.

Can you please describe the process by which I am able to check that value?  I don't have much experience with this; I'm sorry .

Created attachment 184701 [details]
added print log in driver file.

you can check it in 2 steps.
1. Browse through source code, in below file sound/soc/intel/common/sst-acpi.c
   here is the structure which define the values.
 
 static struct sst_acpi_desc sst_acpi_baytrail_desc = {
        .drv_name = "baytrail-pcm-audio",
        .machines = baytrail_machines,
        .resindex_lpe_base = 0,
        .resindex_pcicfg_base = 1,
        .resindex_fw_base = 2,
        .irqindex_host_ipc = 5,
        .sst_id = SST_DEV_ID_BYT,
        .resindex_dma_base = -1,
};

2. In your case if .resindex_dma_base = -1, in step 1 and then get the actual value of this variable by using attached patch file.
let me know the o/p of both the steps.

Created attachment 186621 [details]
dmesg with patch kernel 4.2

dmesg log after running with kernel 4.2

Thanks for your email

I am out till 7th Seo with sporadic email access, I will get back to you after 7th Sep

Regards
--
~Vinod

Created attachment 186631 [details]
config for kernel 4.2

Thanks for your email

I am out till 7th Sep with sporadic email access, I will get back to you after 7th Sep

Regards
--
~Vinod

Created attachment 186641 [details]
output of alsa information script

In 4.2 kernel, there seems to be a change. I now get the following:

[    3.373439] intel_sst_acpi 80860F28:00: LPE base: 0x90a00000 size:0x200000
[    3.373446] intel_sst_acpi 80860F28:00: IRAM base: 0x90ac0000
[    3.373467] intel_sst_acpi 80860F28:00: DRAM base: 0x90b00000
[    3.373476] intel_sst_acpi 80860F28:00: SHIM base: 0x90b40000
[    3.373490] intel_sst_acpi 80860F28:00: Mailbox base: 0x90b44000
[    3.373498] intel_sst_acpi 80860F28:00: DDR base: 0x20000000
[    3.374438] intel_sst_acpi 80860F28:00: Got drv data max stream 25
[    3.375464] intel_sst_acpi 80860F28:00: Direct firmware load for intel/fw_sst_0f28.bin failed with error -2
[    3.375472] intel_sst_acpi 80860F28:00: request fw failed
[    3.480039] bytt100_rt5640 bytt100_rt5640: snd-soc-dummy-dai <-> media-cpu-dai mapping ok
[    3.480094] compress asoc: snd-soc-dummy-dai <-> compress-cpu-dai mapping ok
[    3.480145] bytt100_rt5640 bytt100_rt5640: rt5640-aif1 <-> ssp2-port mapping ok
[    3.480239] bytt100_rt5640 bytt100_rt5640: Connecting non-supply widget to supply widget is not supported (Int Mic -> LDO2)
[    3.480418] bytt100_rt5640 bytt100_rt5640: ASoC: no dapm match for Int Mic --> (null) --> LDO2
[    3.480424] bytt100_rt5640 bytt100_rt5640: ASoC: Failed to add route Int Mic -> direct -> LDO2

...

[    3.793825] ALSA device list:
[    3.793836]   #0: baytrailcraudio

....

[    8.225177] genirq: Flags mismatch irq 8. 00000083 (volume_down) vs. 00000000 (rtc0)
[    8.225188] gpio-keys gpio-keys.0.auto: Unable to claim irq 8; error -16
[    8.225216] gpio-keys: probe of gpio-keys.0.auto failed with error -16
[    8.225412] input: gpio-keys as /devices/platform/gpio-keys.1.auto/input/input5

...

[   21.344448] intel_sst_acpi 80860F28:00: Wait timed-out condition:0x0, msg_id:0x0 fw_state 0x1
[   21.344458] intel_sst_acpi 80860F28:00: fw download failed -16
[   21.344471] intel_sst_acpi 80860F28:00: FW download fail -16
[   21.344833]  Baytrail Audio Port: ASoC: no backend DAIs enabled for Baytrail Audio Port
[   21.345188]  Baytrail Audio Port: ASoC: no backend DAIs enabled for Baytrail Audio Port
....
[   38.194082]  Baytrail Audio Port: ASoC: no backend DAIs enabled for Baytrail Audio Port

Can the IRQ conflicts causing any problem with the sound?
I got the alsa info script from alsa-project and have attached the output.
I also applied the alsa mixed settings from http://mailman.alsa-project.org/pipermail/alsa-devel/2015-June/094080.html , but still no sound.



@razia : Due to a stint with another os, i had to reinstall my old linux setup from scratch. In the new 4.2 kernel, .resindex_dma_base is still -1, and i added your patch, but no output was observed in the attached dmesg log.

Kevin, I guess you used built-in driver config. can you change to modularize to rebuild and try?

Created attachment 187081 [details]
kernel patch with sound drivers as modules

Thanks for your email

I am out till 15th Sep with sporadic email access, I will get back to you after 15th Sep

Regards
--
~Vinod

Current log entries:

[    8.153054] byt-rt5640 byt-rt5640: ASoC: CPU DAI baytrail-pcm-audio not registered
...
[    8.268442] byt-rt5640 byt-rt5640: ASoC: CPU DAI baytrail-pcm-audio not registered
[    8.339067] baytrail-pcm-audio baytrail-pcm-audio: resindex_dma_base=-1
[    8.365005] SSE version of gcm_enc/dec engaged.
[    8.559759] baytrail-pcm-audio baytrail-pcm-audio: ipc: error DSP boot timeout
[    8.777668] byt-rt5640 byt-rt5640: ASoC: CPU DAI baytrail-pcm-audio not registered

Is there anything I could/must do? Is there any progress?

Hi, I would be also interested in a solution. Is still some body working on this?

Thanks for your email

I am attending KS, so please expect delayed responses..

Regards
--
~Vinod

Hi Vinod, any update on this. I would be still interested in a fix, or any hints how to get sound. Would it work with a kernel 4.0+?
Thank you

Hi,
Is there any progress regarding this bug? Should I compile the new kernel and check?

Thanks
Kevin

This issue is being handled in #117141.

Can you attach the output of dmidecode, so that the DMI system identification can be added to the quirk-table in fix patch-set attached to that bug?

Created attachment 214321 [details]
dmidecode output

Created attachment 219741 [details]
firmware binary for baytrail board

Hi Kevin,

Looks like firmware binary is missing/invalid in /lib/firmware/intel/fw_sst_0f28.bin from the below logs:

[    3.375464] intel_sst_acpi 80860F28:00: Direct firmware load for intel/fw_sst_0f28.bin failed with error -2
[    3.375472] intel_sst_acpi 80860F28:00: request fw failed

Could you please check if the above binary is present in the directory mentioned. If not, please copy the attached firmware binary in /lib/firmware/intel/ and update the logs.

please try with more recent kernel and branch at https://github.com/plbossart/sound/commits/topic/v4.8-fixes