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

[Igor Kovalenko <garrison@mail.ru>]

Raymond wrote:
> Igor Kovalenko wrote:
>> Raymond wrote:
>>
>>> 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);
>>>
>>
>>
>> Here is the dmesg excerpt:
>>
>> Vortex: shutdown...<6>done.
>> ACPI: PCI Interrupt 0000:02:06.0[A] -> Link [APC3] -> GSI 18 (level,
>> low) -> IRQ 185
>> Vortex: init.... <6>done.
>> ac97 read  7c : 8384
>> ac97 read  7e : 7605
>> ac97 write 00 : 0000
>> ac97 read  00 : 6940
>> ac97 read  7c : 8384
>> ac97 read  7e : 7605
>> ac97 write 1c : 8a05
>> ac97 read  1c : 8a05
>> ac97 read  7c : 8384
>> ac97 read  7e : 7605
>> ac97 write 1c : 8a06
>> ac97 read  1c : 8a06
>> ac97 read  00 : 6940
>> ac97 read  28 : 0000
>> ac97 write 26 : 0000
>> ac97 write 00 : 0000
>> ac97 write 26 : 0000
>> ac97 write 20 : 0000
>> ac97 read  26 : 000f
>> ac97 read  02 : 8000
>> ac97 read  02 : 8000
>> ac97 write 02 : 0000
>> ac97 read  02 : 0000
>> ac97 write 02 : 8000
>> ac97 read  02 : 8000
>> ac97 write 02 : 8000
>> ac97 write 02 : a0a0
>> ac97 read  02 : 9f9f
>> ac97 write 02 : 9090
>> ac97 read  02 : 9090
>> ac97 read  02 : 9010
>> ac97 write 02 : 9f1f
>> ac97 read  06 : 9f00
>> ac97 read  06 : 8000
>> ac97 write 06 : 0000
>> ac97 read  06 : 0000
>> ac97 write 06 : 8000
>> ac97 read  06 : 8000
>> ac97 write 06 : 8000
>> ac97 write 06 : a0a0
>> ac97 read  06 : a09f
>> ac97 write 06 : 9090
>> ac97 read  06 : 9090
>> ac97 read  06 : 8010
>> ac97 write 06 : bf1f
>> ac97 read  0a : 0000
>> ac97 write 0a : 8000
>> ac97 read  0a : 8000
>> ac97 read  0a : 8000
>> ac97 write 0a : 801e
>> ac97 read  0c : 8008
>> ac97 read  0c : 8008
>> ac97 write 0c : 0008
>> ac97 read  0c : 0008
>> ac97 write 0c : 8008
>> ac97 read  0c : 8008
>> ac97 write 0c : 8008
>> ac97 write 0c : a0a0
>> ac97 read  0c : 8000
>> ac97 write 0c : 9090
>> ac97 read  0c : 8010
>> ac97 write 0c : 8181
>> ac97 read  0c : 8001
>> ac97 read  0c : 8001
>> ac97 write 0c : 801f
>> ac97 read  0e : 8008
>> ac97 read  0e : 8008
>> ac97 write 0e : 0008
>> ac97 read  0e : 0008
>> ac97 write 0e : 8008
>> ac97 read  0e : 8008
>> ac97 write 0e : 8008
>> ac97 write 0e : a0a0
>> ac97 read  0e : a0a0
>> ac97 read  0e : 8000
>> ac97 write 0e : bf3f
>> ac97 read  10 : a828
>> ac97 read  10 : 8808
>> ac97 write 10 : 0808
>> ac97 read  10 : 0808
>> ac97 write 10 : 8808
>> ac97 read  10 : 8808
>> ac97 write 10 : 8808
>> ac97 write 10 : a0a0
>> ac97 read  10 : a0a0
>> ac97 read  10 : 8000
>> ac97 write 10 : bf3f
>> ac97 read  12 : a828
>> ac97 read  12 : 8808
>> ac97 write 12 : 0808
>> ac97 read  12 : 0808
>> ac97 write 12 : 8808
>> ac97 read  12 : 8808
>> ac97 write 12 : 8808
>> ac97 write 12 : a0a0
>> ac97 read  12 : a0a0
>> ac97 read  12 : 8000
>> ac97 write 12 : bf3f
>> ac97 read  14 : a828
>> ac97 read  14 : 8808
>> ac97 write 14 : 0808
>> ac97 read  14 : 0808
>> ac97 write 14 : 8808
>> ac97 read  14 : 8808
>> ac97 write 14 : 8808
>> ac97 write 14 : a0a0
>> ac97 read  14 : a0a0
>> ac97 read  14 : 8000
>> ac97 write 14 : bf3f
>> ac97 read  16 : a828
>> ac97 read  16 : 8808
>> ac97 write 16 : 0808
>> ac97 read  16 : 0808
>> ac97 write 16 : 8808
>> ac97 read  16 : 8808
>> ac97 write 16 : 8808
>> ac97 write 16 : a0a0
>> ac97 read  16 : a0a0
>> ac97 read  16 : 8000
>> ac97 write 16 : bf3f
>> ac97 read  18 : 8808
>> ac97 write 18 : 0808
>> ac97 read  18 : 0808
>> ac97 write 18 : 8808
>> ac97 read  18 : 8808
>> ac97 write 18 : 8808
>> ac97 write 18 : a0a0
>> ac97 read  18 : a0a0
>> ac97 read  18 : 8000
>> ac97 write 18 : bf3f
>> ac97 read  1c : b030
>> ac97 write 1c : 3030
>> ac97 read  1c : 3030
>> ac97 write 1c : b030
>> ac97 read  1c : b030
>> ac97 write 1c : b030
>> ac97 write 1a : 0000
>> ac97 write 1c : 0000
>> ac97 read  20 : 0000
>> ac97 write 20 : 8000
>> ac97 read  20 : 8000
>> ac97 write 20 : 0000
>> ac97 read  20 : 0000
>> ac97 write 20 : 2000
>> ac97 read  20 : 2000
>> ac97 write 20 : 0000
>> ac97 read  20 : 0000
>> ac97 write 20 : 0200
>> ac97 read  20 : 0200
>> ac97 write 20 : 0000
>> ac97 read  20 : 0000
>> ac97 write 20 : 0100
>> ac97 read  20 : 0100
>> ac97 write 20 : 0000
>> ac97 read  22 : 0000
>> ac97 write 22 : 0707
>> ac97 read  22 : 0707
>> ac97 write 22 : 0000
>> ac97 read  26 : 000f
>> ac97 write 26 : 800f
>> ac97 read  26 : 800f
>> ac97 write 26 : 000f
>> ac97 read  2a : ffff
>> ac97 write 2a : ffff
>> ac97 write 02 : 1f1f
>> ac97 write 02 : 1313
>> ac97 write 12 : 3f3f
>> ac97 write 12 : 3434
>> ac97 write 18 : 3f3f
>> ac97 write 18 : 2828
>> ac97 write 20 : 0200
>> ac97 write 22 : 0400
>> ac97 write 22 : 0402
>> ac97 write 26 : 800f
>>
> 
> Since there is no error message "vortex: ac97 codec stuck busy" or
> "vortex: ac97 address never arrived" appear in your system log.
> 
> It seem to me that your problem is due to the routine
> check_volume_resolution() do not take care of the difference between
> STAC9704 (AC97 2.0) and AC97 2.1 Specification. ( "reserved bits are
> don't care upon read back" in AC97 2.0 and "reserved bits must return 0
> upon read back" in AC97 2.1)
> 
> http://cvs.sourceforge.net/viewcvs.py/alsa/alsa-kernel/pci/ac97/ac97_codec.c?r1=1.163&r2=1.164
> 
> 
> You will need to open another bug report with category "AC97" in ALSA
> Bug Tracking System.
> 
> 
> STAC9704 specification
> 
> 1) All registers not shown and bits contain an X are resserved.
> 2) Any reserved bits, marked X, can be written to but are don't care
> upon read back.
> 
> AC97 2.1 specification
> 
> 1) Italian underline indicate optional feature registers or optional
> bits within a register. Whether implemented or not, these may be written
> to but must return 0 if there is no support for this feature.
> 2) Any reserved bits, marked X, can be written to but must return 0 on
> read back.
> 
> 
> Master Volume
> 
> ac97 read  02 : 8000
> ac97 read  02 : 8000
> ac97 write 02 : 0000
> ac97 read  02 : 0000
> ac97 write 02 : 8000
> ac97 read  02 : 8000
> ac97 write 02 : 8000
> ac97 write 02 : a0a0
> ac97 read  02 : 9f9f
> ac97 write 02 : 9090
> ac97 read  02 : 9090
> ac97 read  02 : 9010
> ac97 write 02 : 9f1f  ( 5-bits )
> 
> Master Volume Mono
> 
> ac97 read  06 : 9f00
> ac97 read  06 : 8000
> ac97 write 06 : 0000
> ac97 read  06 : 0000
> ac97 write 06 : 8000
> ac97 read  06 : 8000
> ac97 write 06 : 8000
> ac97 write 06 : a0a0
> ac97 read  06 : a09f <--- ???
> ac97 write 06 : 9090
> ac97 read  06 : 9090
> ac97 read  06 : 8010
> ac97 write 06 : bf1f ( 6-bits )
> 
> Mic Volume
> 
> ac97 read  0e : 8008
> ac97 read  0e : 8008
> ac97 write 0e : 0008
> ac97 read  0e : 0008
> ac97 write 0e : 8008
> ac97 read  0e : 8008
> ac97 write 0e : 8008
> ac97 write 0e : a0a0
> ac97 read  0e : a0a0 <--- ???
> ac97 read  0e : 8000
> ac97 write 0e : bf3f ( 6-bits )
> 
> CD Volume
> 
> ac97 read  12 : a828
> ac97 read  12 : 8808
> ac97 write 12 : 0808
> ac97 read  12 : 0808
> ac97 write 12 : 8808
> ac97 read  12 : 8808
> ac97 write 12 : 8808
> ac97 write 12 : a0a0
> ac97 read  12 : a0a0  <--- ???
> ac97 read  12 : 8000
> ac97 write 12 : bf3f ( 6-bits )
> 
> PCM Volume
> 
> ac97 read  18 : 8808
> ac97 write 18 : 0808
> ac97 read  18 : 0808
> ac97 write 18 : 8808
> ac97 read  18 : 8808
> ac97 write 18 : 8808
> ac97 write 18 : a0a0
> ac97 read  18 : a0a0 <--- ???
> ac97 read  18 : 8000
> ac97 write 18 : bf3f ( 6-bits )
> 
> Record Gain
> 
> ac97 read  1c : b030 <--- ???
> ac97 write 1c : 3030 <--- ???
> ac97 read  1c : 3030 <--- ???
> ac97 write 1c : b030 <--- ???
> ac97 read  1c : b030 <--- ???
> ac97 write 1c : b030 <--- ???
> 
> 
> 
> alsactl restore
> 
> ac97 write 02 : 1f1f
> ac97 write 02 : 1313
> ac97 write 12 : 3f3f  <--- ???
> ac97 write 12 : 3434  <--- ???
> ac97 write 18 : 3f3f  <--- ???
> ac97 write 18 : 2828  <--- ???
> ac97 write 20 : 0200
> ac97 write 22 : 0400
> ac97 write 22 : 0402
> ac97 write 26 : 800f
> 

The patch at Follow-up Comment #42, patch #3948 (project openvortex):
http://sourceforge.net/mailarchive/forum.php?thread_id=7699552&forum_id=33141
which adds extra read after ac97 codec write seem to cure abnormal volume problem,
so I did not look further.

-- 
Kind regards,
Igor V. Kovalenko


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