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
BR,
CK

On 18 October 2016 at 11:48, Thomas Gahr <daga...@gmail.com> wrote:
> 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_bus                1838  1 snd_soc_core
> snd_usb_audio         141947  0
> snd_usbmidi_lib        20465  1 snd_usb_audio
> snd_hwdep               6292  1 snd_usb_audio
> snd_rawmidi            23170  1 snd_usbmidi_lib
> snd_seq_device          4852  1 snd_rawmidi
> snd_pcm                95325  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_codec            12356  0
> snd_soc_core          151946  3 sun4i_codec,snd_soc_pcm,snd_soc_s3c_dma
> snd_pcm_dmaengine       5600  1 snd_soc_core
> ac97_bus                1838  1 snd_soc_core
> ccm                     7895  3
> usb_f_ecm               6613  2
> usb_f_rndis            15906  2
> u_ether                12644  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_conntrack            3007  1
> nf_conntrack          103452  5
> nf_conntrack_ipv4,nf_nat_masquerade_ipv4,xt_conntrack,nf_nat_ipv4,nf_nat
> iptable_filter          1929  1
> arc4                    1943  2
> ath9k_htc              56999  0
> snd_usb_audio         141947  0
> ath9k_common           28242  1 ath9k_htc
> snd_usbmidi_lib        20465  1 snd_usb_audio
> ath9k_hw              438363  2 ath9k_htc,ath9k_common
> snd_hwdep               6292  1 snd_usb_audio
> snd_rawmidi            23170  1 snd_usbmidi_lib
> evdev                  12539  0
> snd_seq_device          4852  1 snd_rawmidi
> snd_pcm                95325  4
> snd_soc_pcm,snd_usb_audio,snd_pcm_dmaengine,snd_soc_core
> snd_timer              22629  1 snd_pcm
> ath                    21859  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_ts                4456  0
> sun4i_ss               16538  0
> sun4i_lradc_keys        3478  0
> spi_sun4i               4571  0
> sunxi_wdt               3769  0
> uio_pdrv_genirq         3591  0
> uio                     9341  1 uio_pdrv_genirq
> sch_fq_codel            9160  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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