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[Legacy kernel] All H3 audio drivers are broken at 24bit resolution?

Christos

By Christos
in Allwinner sunxi

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Christos

Christos

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Hi,

 

Initially this started by trying to have proper capture and playback in PCM/I2S port, but it looks like that ALL H3 audio drivers got the same problem, they cannot capture at 24bits, they cannot do HiFi recording despite the Allwinner's datasheet that they do have 24bits in plain audio port and up to 32bits in PCM/I2S/HDMI.

 

I made a very simple test in another thread here and anyone with any H3 board without anything else can do it too

-> http://forum.armbian.com/index.php/topic/759-tutorial-i2s-on-orange-pi-h3/?p=17595

 

Then it popped to my mind to do the most simple of the tests, in the included/onboard audio codec, wich according to datasheet it is working to 24bits, so not even a PCM/I2S enabled board is needed, just a stock one.

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Welcome to ARMBIAN Debian GNU/Linux 8 (jessie) 3.4.112-sun8i
System load:   0.07             Up time:       2 hours
Memory usage:  11 % of 494Mb    IP:            192.168.1.10
CPU temp:      44°C
Usage of /:    7% of 15G


[ 2 updates to install: apt-get upgrade ]

Last login: Sat Oct 15 08:21:07 2016 from 192.168.1.6
root@orangepione:~# cat /etc/asound.conf
pcm.!default  {
 type hw card 0
}
ctl.!default {
 type hw card 0
}

root@orangepione:~# aplay -l
**** List of PLAYBACK Hardware Devices ****
card 0: audiocodec [audiocodec], device 0: SUNXI-CODEC sndcodec-0 []
  Subdevices: 1/1
  Subdevice #0: subdevice #0
card 1: sndhdmi [sndhdmi], device 0: SUNXI-HDMIAUDIO sndhdmi-0 []
  Subdevices: 1/1
  Subdevice #0: subdevice #0
root@orangepione:~#
root@orangepione:~# alsacap/alsacap
*** Scanning for playback devices ***
Card 0, ID `audiocodec', name `audiocodec'
  Device 0, ID `SUNXI-CODEC sndcodec-0', name `', 1 subdevices (1 available)
    1..2 channels, sampling rate 8000..192000 Hz
    Sample formats: S16_LE, S24_LE, S32_LE, S20_3LE
      Subdevice 0, name `subdevice #0'
Card 1, ID `sndhdmi', name `sndhdmi'
  Device 0, ID `SUNXI-HDMIAUDIO sndhdmi-0', name `', 1 subdevices (1 available)
    1..8 channels, sampling rate 8000..192000 Hz
    Sample formats: S16_LE, S24_LE, S32_LE, S20_3LE
      Subdevice 0, name `subdevice #0'
root@orangepione:~#

As you see, this is a plain stock OrangePi One and got the onboard audio codec displayed.

There is an error in the above system reporting, the codec according to datasheet is able to go up to 48KHz and not up to 192KHz, that is an indication that whoever did the driver implementation didnt do it properly..

 

Next, I did the same test as in the PCM/I2S post above, this time with the onboard codec Card 0, ID `audiocodec', name `audiocodec'

root@orangepione:~# arecord -t wav -c 2 -f S24_LE -r 48000 -d 10 testrec.wav
Recording WAVE 'testrec.wav' : Signed 24 bit Little Endian, Rate 48000 Hz, Stereo
root@orangepione:~#

Requested a 10 seconds recording at 24bits.

As previously, the system took 20 seconds of a recording..

Then did the aplay of the recorded file

root@orangepione:~# aplay testrec.wav
Playing WAVE 'testrec.wav' : Signed 24 bit Little Endian, Rate 48000 Hz, Stereo
root@orangepione:~#

which again did squeeze the 20 seconds of initial recording into 10 seconds..

 

 

Thus, if I look at it correctly, we have a more generic audio issue in H3 audio drivers and not only to PCM/I2S that initially thought.

Could be the DMA implemetnation or timing, dont know.

 

 

@Igor and admins, do you think we can report this to linux sunxi for rectification?

 

 

Christos

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tkaiser

tkaiser

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report this to linux sunxi for rectification?

 

Well, I added an important piece of information to the thread title: "[legacy kernel]". The linux-sunxi developers are working on mainline kernel, BSP is used there if documentation sucks (looking into sources whether they have a proper license, if this is the case, look through the code, throw the BSP code away and implement stuff from scratch).

 

You could try your luck in linux-sunxi IRC anyway :)

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Christos

Christos

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Ok Thomas, indeed needed the kernel clarification.

 

It also eluded me that most likely the mainline devs couldnt care less for any legacy issues.

 

On the other hand though, is there any way we can have audio in mainline for H3??

I'm not able to have audio drivers at vanilla in either OPi or NPi

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Last login: Sat Oct 15 12:03:39 2016 from 192.168.1.6
root@nanopineo:~# aplay -l
aplay: device_list:268: no soundcards found...
root@nanopineo:~#

Or is there any guide somewhere that we can enable even the onboard H3 audio?

 

 

Christos

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tkaiser

tkaiser

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Vanilla is (getting to) be server ready, no multimedia support.

http://linux-sunxi.org/Linux_mainlining_effort#Status_Matrix

 

I remember some linux-sunxi devs being pretty enthousiastic a few days ago when new HDMI drivers have been spotted in latest release of Allwinner's 3.4 BSP since this is the first time they got a proper license (and can now be used to implement HDMI in mainline kernel and u-boot). Maybe the same applies to Audio too (still no idea since enjoying the silence ;) )

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jernej

jernej

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I remember some linux-sunxi devs being pretty enthousiastic a few days ago when new HDMI drivers have been spotted in latest release of Allwinner's 3.4 BSP since this is the first time they got a proper license (and can now be used to implement HDMI in mainline kernel and u-boot). Maybe the same applies to Audio too (still no idea since enjoying the silence ;) )

 

Yes, all audio drivers also have proper license now. We should see more H3 media related work now. I already informed Jean-Francois Moine about that, the guy who works on DRM and HDMI video & audio driver for H3 and A83T. He said it will take couple of weeks to upload the driver. BTW, from what I saw, SPDIF driver should already work on mainline. I'm not sure about I2S driver though. It would be best if you ask codekipper or someone else about I2S on H3 status on IRC. IIRC someone already started working on some audio drivers, apart from SPDIF and HDMI audio.

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Christos

Christos

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Yes, all audio drivers also have proper license now. We should see more H3 media related work now. I already informed Jean-Francois Moine about that, the guy who works on DRM and HDMI video & audio driver for H3 and A83T. He said it will take couple of weeks to upload the driver. BTW, from what I saw, SPDIF driver should already work on mainline. I'm not sure about I2S driver though. It would be best if you ask codekipper or someone else about I2S on H3 status on IRC. IIRC someone already started working on some audio drivers, apart from SPDIF and HDMI audio.

 

Thanks for the info, really appreciated.

 

If you happen to have the name of the relevant IRC (or a link) for me to keep an eye on would be great.

 

 

Christos

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Christos

Christos

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I remember some linux-sunxi devs being pretty enthousiastic a few days ago when new HDMI drivers have been spotted in latest release of Allwinner's 3.4 BSP since this is the first time they got a proper license (and can now be used to implement HDMI in mainline kernel and u-boot). Maybe the same applies to Audio too (still no idea since enjoying the silence ;) )

 

 

Seen some VERY INTERESTING diffs from orangepi's sourcetree there!!

 

I will give it a try, make a little patch on the relevant device files and apply it to Igor's build..

 

If that is for real and works.. then............  

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tkaiser

tkaiser

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Seen some VERY INTERESTING diffs from orangepi's sourcetree there!!

 

Be careful, Armbian sun8i legacy is here: https://github.com/igorpecovnik/linux/tree/sun8i

 

And 'history' of Allwinner's 3.4 BSP used for H3 boards (this latest version not including) can be found there: http://forum.armbian.com/index.php/topic/1351-h3-board-buyers-guide/?p=10144

 

@jernej wanted to have a closer look into this new BSP variant -- he's away for a few days and might comment when he's back.

 

Edit: LOL, totally missed that he already answered everything before :)

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Christos

Christos

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Be careful, Armbian sun8i legacy is here: https://github.com/igorpecovnik/linux/tree/sun8i

 

And 'history' of Allwinner's 3.4 BSP used for H3 boards (this latest version not including) can be found there: http://forum.armbian.com/index.php/topic/1351-h3-board-buyers-guide/?p=10144

 

@jernej wanted to have a closer look into this new BSP variant -- he's away for a few days and might comment when he's back.

 

I understand.

 

From a first glimpse, it shows that in this latest BSP they do have added handling of the 24bit resolution, its obvious from the diffs in sound/soc/sunxi.

If the modifications in sound/soc drivers involve and require major other changes in different modules (eg dma or clock/timing), then I do not think I'm gonna get the whole of it done, its above me, if on the other hand changes are compartmentalized only to the driver files without any other dependants, then I'll give it a try.

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Christos

Christos

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"Houston, Tranquility Base here. The Eagle has landed."

 

@tkaiser

Thomas, a very big thank you!!

 

 

Applied the driver files patch and everything works!! :D

Got S24_LE working ok in 96K & 192K.

 

 

Thanks again

Christos

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Christos

Christos

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The diffs in sound/soc/sunxi/hdmiaudio are almost like a rewrite of the driver, there are way too many changes in there so I guess they took care of it like they did in daudio (PCM/I2S). I've kept it simple and patched only the later and tested just for my own purposes.

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