Re: [linux-sunxi] A20, Mainline kernel: how to get sound on headphone output?

[Thomas Gahr]

>
> can you run dmesg | grep codec and also show a diff of all your 
> changes. To get the codec working should only be one line added to 
> your dts. 
>

D'oh! You got me thinking here for a while. Turns out, I made the wrong 
kind of change to the dts.
I generated the .dts from the .dtb in /boot/dtbs with dtc -I dtb -O dts and 
then changed codec's status from "disabled" to "enabled". (I'm coming from 
3.4.X & .fex land so I need to get used to dts).
I now added the following entry to sun7i-a20-olinuxino-micro.dts and went 
the whole preprocess-then-dtc route and it works fine now.

 {
  status="okay";
}



Sorry for the noise and thanks for the help/inspiration :)

Thomas

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Re: [linux-sunxi] A20, Mainline kernel: how to get sound on headphone output?

[Code Kipper]

On 18 October 2016 at 12:13, Thomas Gahr  wrote:
>> Hi Thomas,
>> have you played with the alsamixer settings? you may have to do some
>> unmuting https://groups.google.com/forum/#!topic/linux-sunxi/rJDiF8qSnLc
>
>
> Hi CodeKipper,
> thanks for your answer!
>
> I'm afraid playing with alsa(mixer) settings is no help for me, since alsa
> does not even recognize the card, so there's nothing I can unmute.
> I *did* try to play with the settings (like the suggestion from
> https://linux-sunxi.org/Audio_Codec) but, no surprise here, this did not
> work, it only lead to I/O error message from alsamixer.
> The hardware is not even showing up in /sys/class/sound so I think the error
> is "below" alsa, i.e. something wrong with my kernel config / modules loaded
> or missing
can you run dmesg | grep codec and also show a diff of all your
changes. To get the codec working should only be one line added to
your dts.
CK
>
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Re: [linux-sunxi] A20, Mainline kernel: how to get sound on headphone output?

[Thomas Gahr]

>
> Hi Thomas, 
> have you played with the alsamixer settings? you may have to do some 
> unmuting https://groups.google.com/forum/#!topic/linux-sunxi/rJDiF8qSnLc 
>

Hi CodeKipper,
thanks for your answer!

I'm afraid playing with alsa(mixer) settings is no help for me, since alsa 
does not even recognize the card, so there's nothing I can unmute.
I *did* try to play with the settings (like the suggestion from 
https://linux-sunxi.org/Audio_Codec) but, no surprise here, this did not 
work, it only lead to I/O error message from alsamixer.
The hardware is not even showing up in /sys/class/sound so I think the 
error is "below" alsa, i.e. something wrong with my kernel config / modules 
loaded or missing 

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[linux-sunxi] A20, Mainline kernel: how to get sound on headphone output?

[Thomas Gahr]

Hello,

I've been trying to figure out how to get sound on the headphone outputs. 
AFAICT, A20 supports I2S and S/PDIF but these are for external audio 
components, while I only need the internal headphone amp.
I've seen that the audio codec has been added in 4.4 but it is disabled in 
the .dts file used in my kernel. I've enabled it and re-compiled the dtb, 
and after reboot I loaded the sun4i-codec module but still I have no 
success.

The problem: alsa does not show the device, also in /dev/snd there's only 
the USB audio card I've been using so far (which I'd love to get rid of). 
dmesg also does not mention anything about the audio-codec.
I'm sure there's something simple I'm missing, the question is just: what?

Some information:

root@alarmaster /boot # uname -a
Linux alarmaster 4.8.1-2-ARCH #1 SMP Sat Oct 8 15:03:46 MDT 2016 armv7l 
GNU/Linux

root@alarmaster /boot # lsmod|grep snd
snd_soc_pcm 5489  0
snd_soc_s3c_dma 1531  1 snd_soc_pcm
snd_soc_core  151946  3 sun4i_codec,snd_soc_pcm,snd_soc_s3c_dma
snd_pcm_dmaengine   5600  1 snd_soc_core
ac97_bus1838  1 snd_soc_core
snd_usb_audio 141947  0
snd_usbmidi_lib20465  1 snd_usb_audio
snd_hwdep   6292  1 snd_usb_audio
snd_rawmidi23170  1 snd_usbmidi_lib
snd_seq_device  4852  1 snd_rawmidi
snd_pcm95325  4 
snd_soc_pcm,snd_usb_audio,snd_pcm_dmaengine,snd_soc_core
snd_timer  22629  1 snd_pcm



root@alarmaster /boot # lsmod
Module  Size  Used by
snd_soc_pcm 5489  0
snd_soc_s3c_dma 1531  1 snd_soc_pcm
sun4i_codec12356  0
snd_soc_core  151946  3 sun4i_codec,snd_soc_pcm,snd_soc_s3c_dma
snd_pcm_dmaengine   5600  1 snd_soc_core
ac97_bus1838  1 snd_soc_core
ccm 7895  3
usb_f_ecm   6613  2
usb_f_rndis15906  2
u_ether12644  2 usb_f_ecm,usb_f_rndis
ipt_MASQUERADE  1223  1
nf_nat_masquerade_ipv4 2957  1 ipt_MASQUERADE
iptable_nat 1924  1
nf_nat_ipv4 5381  1 iptable_nat
nf_nat 17482  2 nf_nat_masquerade_ipv4,nf_nat_ipv4
xt_tcpudp   2322  8
nf_conntrack_ipv4  14210  2
nf_defrag_ipv4  1620  1 nf_conntrack_ipv4
xt_conntrack3007  1
nf_conntrack  103452  5 
nf_conntrack_ipv4,nf_nat_masquerade_ipv4,xt_conntrack,nf_nat_ipv4,nf_nat
iptable_filter  1929  1
arc41943  2
ath9k_htc  56999  0
snd_usb_audio 141947  0
ath9k_common   28242  1 ath9k_htc
snd_usbmidi_lib20465  1 snd_usb_audio
ath9k_hw  438363  2 ath9k_htc,ath9k_common
snd_hwdep   6292  1 snd_usb_audio
snd_rawmidi23170  1 snd_usbmidi_lib
evdev  12539  0
snd_seq_device  4852  1 snd_rawmidi
snd_pcm95325  4 
snd_soc_pcm,snd_usb_audio,snd_pcm_dmaengine,snd_soc_core
snd_timer  22629  1 snd_pcm
ath21859  3 ath9k_htc,ath9k_hw,ath9k_common
mac80211  417547  1 ath9k_htc
axp20x_pek  3651  0
dwmac_sunxi 2638  0
stmmac_platform 5932  1 dwmac_sunxi
cfg80211  254986  4 ath9k_htc,mac80211,ath,ath9k_common
stmmac 82035  3 stmmac_platform,dwmac_sunxi
rfkill 19399  3 cfg80211
sun4i_ts4456  0
sun4i_ss   16538  0
sun4i_lradc_keys3478  0
spi_sun4i   4571  0
sunxi_wdt   3769  0
uio_pdrv_genirq 3591  0
uio 9341  1 uio_pdrv_genirq
sch_fq_codel9160  8
libcomposite   44779  16 usb_f_ecm,usb_f_rndis
ip_tables  12937  2 iptable_filter,iptable_nat
x_tables   18965  5 
ip_tables,iptable_filter,xt_tcpudp,ipt_MASQUERADE,xt_conntrack




Thanks,


Thomas

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