At Tue, 19 Aug 2008 08:03:14 +0300,
ikke wrote:
>
> On Mon, Aug 18, 2008 at 3:42 PM, Takashi Iwai <tiwai@xxxxxxx> wrote:
> > At Mon, 18 Aug 2008 15:28:00 +0300,
> > Ilkka Tengvall wrote:
> >>
> >> >> the reasoning for the original patch sounds reasonable. The
> >> >> mic volume is tunable, only at the very low range. I recall the laptop
> >> >> came with Win98, and there was no problem then with the sound -> not a
> >> >> HW problem. I have never got this laptop mic working with linux, so
> >> >> this is not anything that broke recently. I see there is
> >> >> check_volume_resolution function which tries to guess some of the
> >> >> register ranges, but maybe it get's it wrong with this HW.
> >> >
> >> > Maybe, maybe not. You should check rather ac97 registers in
> >> > /proc/asound/card0/codec97#0/ac97#0-0+regs. If build with
> >> > CONFIG_SND_DEBUG=y, you can write to the register directly, too.
> >> > See Documentaiton[/sound/alsa]/Procfile.txt.
> >> >
> >>
> >> I checked this file. It seems it gets the regs right for the mic
> >> (range 0x1f). The capture range is 0xf. I don't have the specs to
> >> compare it against, so I assume there is nothing to do more here.
> >
> > Which registers, exactly?
>
> The ones affected by changing mic volume and capture in alsamixer,
> those I that I pasted the diffs of previously. In alsamixer it has
> slider for mic volume, and capture volume. And mic can be set as
> capture device. In code (which the patch touched) it speaks about "Mic
> Capture Volume", that made me think it would affect the volume used
> for capturing (recording?) mic.
>
> ac97_codec.c:
> AC97_SINGLE("Mic Capture Switch", AC97_REC_GAIN_MIC, 15, 1, 1),
> AC97_SINGLE("Mic Capture Volume", AC97_REC_GAIN_MIC, 0, 15, 0)
>
> That is 4 bits (15, f), not 5 bits (31, 1f). But if this is really
> only volume control for mic playback, not capture, then I assume it
> doesn't matter. Could you please still confirm this?
Hm, I thought Allegro has no mic-capture volume (0x1e) but only the
standard capture volume (0x1c). Are you sure that it's 0x1e?
Takashi
> >> It seems mic value decreases while going up to full, where as capture
> >> increases.
> >
> > I guess the former one is the mic loopback volume (attenuation), so no
> > wonder it behaves so.
> >
> >> Another difference is maybe stereo / mono related, the
> >> capture changes both bytes whereas mic only the other one. Also one
> >> thing, should the mic level be around 0x40 - 0x5f, not 0x0 - 0x1f.
> >
> > The bit 0x40 indicates the mic boost +20dB.
> >
>
> Thanks for the explanation,
>
> ikke
>
>
>
> I still attach here the all ac97 regs dump, ac97info from same dir and
> amixer dump:
>
>
> ac97#0-0+regs
> ---------------------
> 0:00 = 3e80
> 0:02 = 0606
> 0:04 = 0000
> 0:06 = 0000
> 0:08 = 0000
> 0:0a = 0000
> 0:0c = 8000
> 0:0e = 0040
> 0:10 = 0000
> 0:12 = 0000
> 0:14 = 0000
> 0:16 = 0000
> 0:18 = 0000
> 0:1a = 0000
> 0:1c = 0f0f
> 0:1e = 0000
> 0:20 = 0000
> 0:22 = 0000
> 0:24 = 0000
> 0:26 = 800f
> 0:28 = 0002
> 0:2a = 0000
> 0:2c = 0000
> 0:2e = 0000
> 0:30 = 0000
> 0:32 = 0000
> 0:34 = 0000
> 0:36 = 0000
> 0:38 = 0000
> 0:3a = 0000
> 0:3c = 0000
> 0:3e = 0000
> 0:40 = 0000
> 0:42 = 0000
> 0:44 = 0000
> 0:46 = 0000
> 0:48 = 0000
> 0:4a = 0000
> 0:4c = 0000
> 0:4e = 0000
> 0:50 = 0000
> 0:52 = 0000
> 0:54 = 0000
> 0:56 = 0000
> 0:58 = 0000
> 0:5a = 0000
> 0:5c = 0000
> 0:5e = 0000
> 0:60 = 0000
> 0:62 = 0000
> 0:64 = 0000
> 0:66 = 0000
> 0:68 = 0000
> 0:6a = 0000
> 0:6c = 0000
> 0:6e = 0000
> 0:70 = 0000
> 0:72 = 0000
> 0:74 = 0000
> 0:76 = 0000
> 0:78 = 0000
> 0:7a = 0000
> 0:7c = 4583
> 0:7e = 8308
> ---------------------
>
>
> ac97#0-0
> ---------------------
> 0-0/0: ESS Technology ESS1988
>
> PCI Subsys Vendor: 0x0000
> PCI Subsys Device: 0x0000
>
> Capabilities :
> DAC resolution : 20-bit
> ADC resolution : 20-bit
> 3D enhancement : ESS Technology Stereo Enhancement
>
> Current setup
> Mic gain : +20dB [+20dB]
> POP path : pre 3D
> Sim. stereo : off
> 3D enhancement : off
> Loudness : off
> Mono output : MIX
> Mic select : Mic1
> ADC/DAC loopback : off
> Double rate slots: 10/11
> Extended ID : codec=0 rev=0 DSA=0 DRA
> Extended status :
> ---------------------
>
> amixer
> ---------------------
> 0-0/0: ESS Technology ESS1988
>
> PCI Subsys Vendor: 0x0000
> PCI Subsys Device: 0x0000
>
> Capabilities :
> DAC resolution : 20-bit
> ADC resolution : 20-bit
> 3D enhancement : ESS Technology Stereo Enhancement
>
> Current setup
> Mic gain : +20dB [+20dB]
> POP path : pre 3D
> Sim. stereo : off
> 3D enhancement : off
> Loudness : off
> Mono output : MIX
> Mic select : Mic1
> ADC/DAC loopback : off
> Double rate slots: 10/11
> Extended ID : codec=0 rev=0 DSA=0 DRA
> Extended status :
> kaarina@kannettava:~$ cat /tmp/amixer
> Simple mixer control 'Master',0
> Capabilities: pvolume pswitch pswitch-joined
> Playback channels: Front Left - Front Right
> Limits: Playback 0 - 31
> Mono:
> Front Left: Playback 25 [81%] [-9.00dB] [on]
> Front Right: Playback 25 [81%] [-9.00dB] [on]
> Simple mixer control 'Master Mono',0
> Capabilities: pvolume pvolume-joined pswitch pswitch-joined
> Playback channels: Mono
> Limits: Playback 0 - 31
> Mono: Playback 31 [100%] [0.00dB] [on]
> Simple mixer control '3D Control - Center',0
> Capabilities: volume volume-joined
> Playback channels: Mono
> Capture channels: Mono
> Limits: 0 - 15
> Mono: 15 [100%]
> Simple mixer control '3D Control - Depth',0
> Capabilities: volume volume-joined
> Playback channels: Mono
> Capture channels: Mono
> Limits: 0 - 15
> Mono: 15 [100%]
> Simple mixer control 'PCM',0
> Capabilities: pvolume pswitch pswitch-joined
> Playback channels: Front Left - Front Right
> Limits: Playback 0 - 31
> Mono:
> Front Left: Playback 31 [100%] [12.00dB] [on]
> Front Right: Playback 31 [100%] [12.00dB] [on]
> Simple mixer control 'Line',0
> Capabilities: pvolume pswitch pswitch-joined cswitch cswitch-exclusive
> Capture exclusive group: 0
> Playback channels: Front Left - Front Right
> Capture channels: Front Left - Front Right
> Limits: Playback 0 - 31
> Front Left: Playback 31 [100%] [12.00dB] [on] Capture [off]
> Front Right: Playback 31 [100%] [12.00dB] [on] Capture [off]
> Simple mixer control 'CD',0
> Capabilities: pvolume pswitch pswitch-joined cswitch cswitch-exclusive
> Capture exclusive group: 0
> Playback channels: Front Left - Front Right
> Capture channels: Front Left - Front Right
> Limits: Playback 0 - 31
> Front Left: Playback 31 [100%] [12.00dB] [on] Capture [off]
> Front Right: Playback 31 [100%] [12.00dB] [on] Capture [off]
> Simple mixer control 'Mic',0
> Capabilities: pvolume pvolume-joined pswitch pswitch-joined cswitch
> cswitch-exclusive
> Capture exclusive group: 0
> Playback channels: Mono
> Capture channels: Front Left - Front Right
> Limits: Playback 0 - 31
> Mono: Playback 31 [100%] [12.00dB] [on]
> Front Left: Capture [on]
> Front Right: Capture [on]
> Simple mixer control 'Mic Boost (+20dB)',0
> Capabilities: pswitch pswitch-joined
> Playback channels: Mono
> Mono: Playback [on]
> Simple mixer control 'Mic Select',0
> Capabilities: enum
> Items: 'Mic1' 'Mic2'
> Item0: 'Mic1'
> Simple mixer control 'Video',0
> Capabilities: cswitch cswitch-exclusive
> Capture exclusive group: 0
> Capture channels: Front Left - Front Right
> Front Left: Capture [off]
> Front Right: Capture [off]
> Simple mixer control 'Phone',0
> Capabilities: pvolume pvolume-joined pswitch pswitch-joined cswitch
> cswitch-exclusive
> Capture exclusive group: 0
> Playback channels: Mono
> Capture channels: Front Left - Front Right
> Limits: Playback 0 - 31
> Mono: Playback 31 [100%] [12.00dB] [off]
> Front Left: Capture [off]
> Front Right: Capture [off]
> Simple mixer control 'PC Speaker',0
> Capabilities: pvolume pvolume-joined pswitch pswitch-joined
> Playback channels: Mono
> Limits: Playback 0 - 15
> Mono: Playback 15 [100%] [0.00dB] [on]
> Simple mixer control 'Aux',0
> Capabilities: cswitch cswitch-exclusive
> Capture exclusive group: 0
> Capture channels: Front Left - Front Right
> Front Left: Capture [off]
> Front Right: Capture [off]
> Simple mixer control 'Mono Output Select',0
> Capabilities: enum
> Items: 'Mix' 'Mic'
> Item0: 'Mix'
> Simple mixer control 'Capture',0
> Capabilities: cvolume cswitch cswitch-joined
> Capture channels: Front Left - Front Right
> Limits: Capture 0 - 15
> Front Left: Capture 15 [100%] [22.50dB] [on]
> Front Right: Capture 15 [100%] [22.50dB] [on]
> Simple mixer control 'Mix',0
> Capabilities: cswitch cswitch-exclusive
> Capture exclusive group: 0
> Capture channels: Front Left - Front Right
> Front Left: Capture [off]
> Front Right: Capture [off]
> Simple mixer control 'Mix Mono',0
> Capabilities: cswitch cswitch-exclusive
> Capture exclusive group: 0
> Capture channels: Front Left - Front Right
> Front Left: Capture [off]
> Front Right: Capture [off]
> Simple mixer control 'External Amplifier',0
> Capabilities: pswitch pswitch-joined
> Playback channels: Mono
> Mono: Playback [off]
> ---------------------
>
_______________________________________________
Alsa-devel mailing list
Alsa-devel@xxxxxxxxxxxxxxxx
http://mailman.alsa-project.org/mailman/listinfo/alsa-devel
