Re: [Openvortex-dev] Re: Re: [ALSA - driver 0001138]: errors when installing au8820 modules

Raymond
2005-06-28T07:50:54Z

Igor Kovalenko wrote:
> Raymond wrote:
>>Igor Kovalenko wrote:
>>
>>>Well, I've not stated the problem clearly enough.
>>>Once set, volume stays as it should. The problem is that
>>>PCM volume is:
>>>1% - at lowest audible level
>>>25% - at about 50% audible level
>>>49% - at about max audible level
>>>51% - at lowest audible level
>>>75% - at about 50% audible level
>>>99% - at about max audible level
>>>- that is what I described as low-high-low-high.
>>>On the other hand, Master volume behaves as expected.
>>
>>
>>
>>What is the value of comment.range of 'PCM Playback Volume' in
>>/etc/asound.state for your STAC9704 (au8820) ?
>>
>>
>>According to 9704SPEC.pdf, it should be '0-31' ( 5 bits ) for STAC9704
>>PCM Out volume.
>>
>
>
> control.21 {
> comment.access 'read write'
> comment.type INTEGER
> comment.count 2
> comment.range '0 - 63'
> iface MIXER
> name 'PCM Playback Volume'
> value.0 21
> value.1 21
> }
>
> Do you mean AC97 is incorrectly reporting 0...63 range?
>
>

Try the following patch to log the read/write of ac97 and post the
system log using dmesg. (loading au8820 and alsactl restore)

alsa-driver-1.0.9b/alsa-kernel/pci/au88x0/au88x0_core.c
@@ -2520,6 +2515,7 @@
vortex_t *card = (vortex_t *) codec->private_data;
unsigned int lifeboat = 0;

+ printk(KERN_INFO "ac97 write %.2x : %.4x\n",addr,data);
/* wait for transactions to clear */
while (!(hwread(card->mmio, VORTEX_CODEC_CTRL) & 0x100)) {
udelay(100);
@@ -2567,6 +2563,7 @@
}
} while ((data & VORTEX_CODEC_ADDMASK) !=
(addr << VORTEX_CODEC_ADDSHIFT));
+ printk(KERN_INFO "ac97 read %.2x : %.4x\n",addr,data &
VORTEX_CODEC_DATMASK);

/* return data. */
return (u16) (data & VORTEX_CODEC_DATMASK);

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