[alsa-devel] Smart 5.1 function not working on VIA VT1708S with *three* jacks on mainboard

[Viliam Kubis]

I have tried the patch on clean (unpatched) patch_via.c. dmesg prints
out ***PATCH 08/07/10 as expected, but the surround does not work.
Surround and cen/lfe controls are also not created for alsamixer without
other patches. What does work is specifying -Dsurround40 for
speaker-test but there is no sound from rear speakers. If you want, I
can post the whole patched patch_via.c somewhere or we can work on new
patches starting with this one.

  On Thu, 08 Jul 2010 08:33:34 +0200, Clemens Ladisch <clemens at ladisch.de>
  wrote:

>> Viliam Kubis wrote:
>>> Hello, for quite some time the "Smart 5.1" function in alsa is not  
>>> working
>>> properly when motherboard has only 3 audio jacks.
>>>
>>> speaker-test -c 4 -t wav -Dsurround40
>>>
>>> Channels count (4) not available for playbacks: Invalid argument
>>
>> Please try the patch below.
>>
>> (This function uses 0x12 and 0x13 as the NIDs for the center/LFE and
>> side DACs.  Shouldn't these be 0x24 and 0x25, as per the datasheet?)
>>
>> --- a/sound/pci/hda/patch_via.c
>> +++ b/sound/pci/hda/patch_via.c
>> @@ -2265,6 +2265,13 @@ static int vt1708_auto_fill_dac_nids(str
>>  		}
>>  	}
>> +	/* for Smart 5.1, line/mic inputs double as output pins */
>> +	if (cfg->line_outs == 1) {
>> +		spec->multiout.num_dacs = 3;
>> +		spec->multiout.dac_nids[AUTO_SEQ_SURROUND] = 0x11;
>> +		spec->multiout.dac_nids[AUTO_SEQ_CENLFE] = 0x12;
>> +	}
>> +
>>  	return 0;
>>  }
>>
>


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