[alsa-devel] [PATCH v3 4/4] ALSA: hda - Add DP-MST support for NVIDIA codecs

[Jaroslav Kysela]

Dne 03. 02. 20 v 0:50 Martin Regner napsal(a):
> Hi Jaroslav,
> 
> thanks for the tip. I tried this (in my case echo on  >
> /sys/bus/pci/devices/0000\:09\:00.1/power/control) but that didn't help.
> 
> If i comment out the line
> 
> spec->dyn_pcm_assign = true;
> 
> in patch_nvhdmi sound is working again.

Could you show us (upload it to the alsa server and post only URLs) the output 
from alsa-info.sh for both variants (spec->dyn_pcm_assign = true and false) ?

					Thanks,
						Jaroslav

> 
> Curiously nobody else seems to have this problem. This makes me think
> the problem lies elsewhere but i have no more ideas at the moment.
> 
> On 03.02.20 00:00, Jaroslav Kysela wrote:
>> Dne 02. 02. 20 v 15:18 Martin Regner napsal(a):
>>> Hi Takashi,
>>>
>>> thanks for your reply. I tried that with
>>>
>>> cat /proc/asound/card0/codec#0
>>>
>>> but that doesn't help. I'm digging me through the kernel config right
>>> now. May have to change something else.
>>>
>>> I simply could create a patch on my gentoo system switching from
>>> patch_nvhdmi to patch_nvhdmi_legacy for every new kernel, but that won't
>>> work forever.
>>>
>>> If you have other thinks i could try i'd appreciate to hear them.
>>
>> You may try to disable PM:
>>
>> echo on > /sys/bus/pci/devices/0000\:01\:00.1/power/control
>>
>>                  Jaroslav
>>
>>
>>>
>>> kind regards
>>> Martin
>>>
>>> On 02.02.20 09:37, Takashi Iwai wrote:
>>>> On Sat, 01 Feb 2020 16:28:08 +0100,
>>>> Martin Regner wrote:
>>>>> Hi there,
>>>>>
>>>>> since i updated to kernel 5.5 i have no sound over hdmi anymore
>>>>> (GeForce RTX
>>>>> 2070).
>>>>>
>>>>> With the previous kernel 5.4.14 everything is fine.
>>>>>
>>>>> Although i got sound with speaker-test -D hdmi:CARD=NVidia,DEV=2 -c
>>>>> 2 -r
>>>>> 44100, pavucontrol shows all hdmi sound devices as unplugged.
>>>>>
>>>>> I bisected it down to this commit
>>>>> (5398e94fb753d022301825ebfa5f7cf8a660d8eb)
>>>>> and changed the line
>>>>>
>>>>> HDA_CODEC_ENTRY(0x10de0093, "GPU 93 HDMI/DP",  patch_nvhdmi)
>>>>>
>>>>> to
>>>>>
>>>>> HDA_CODEC_ENTRY(0x10de0093, "GPU 93 HDMI/DP", patch_nvhdmi_legacy)
>>>>>
>>>>> Now it's working again. I'm not sure if this is a problem with
>>>>> pulseaudio or
>>>>> if the RTX 2070 does not support the mentioned codec.
>>>> The runtime PM turns off the link, so the hotplug notification won't
>>>> be delivered as default.  Please try reading the corresponding proc
>>>> file, /proc/asound/card*/codec* file.  This may power up the codec and
>>>> trigger the hotplug detection if that's the cause.
>>>>
>>>>
>>>> Takashi
>>>
>>>
>>> _______________________________________________
>>> Alsa-devel mailing list
>>> Alsa-devel at alsa-project.org
>>> https://mailman.alsa-project.org/mailman/listinfo/alsa-devel
>>>
>>
>>
> 


-- 
Jaroslav Kysela <perex at perex.cz>
Linux Sound Maintainer; ALSA Project; Red Hat, Inc.