On 23 Oct 2008, at 23:12, Oliver Ford oliford@oliford.co.uk wrote:

Oliver Ford wrote:

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   name 'Speaker Playback Volume'
   value 1

}

This is unrelated, I have just left it there from playing around.

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One other thing that would be useful would be to put trace which logs the register writes in ac97_write() in the driver and then try testing both using alsamixer and then amixer to do the final enable of the Speaker Mixer PCM Playback Switch.

Well...

In terms of the control's direct effect, setting it in alsamixer gives: pxa2xx_ac97_write: 0c = af08

setting it in amixer: pxa2xx_ac97_write: 0c = af09

Am I right in understanding that setting all the controls in amixer doesn't actually enable the control in the codec chip at that time but that the powering on/off is done by soc-dapm.c when the the DAC is actually enabled when playing some audio? This appears to be what is happening when it does work (looking at the log). I hadn't realised this.

However, after running the offending amixer command this no longer happens. It seems that the dapm_power_widgets() function determines that the DAC is off and so doesn't power any widgets on at all.

I've put some debugging in pxa2xx-ac97-write and in dapm_power_widgets() and the log is attached (stripped of non-audio stuff).

Oliver

Clean boot...

** run speaker.sh setup without PCM->speaker setting... ** pxa2xx_ac97_write: 000c = ef08 pxa2xx_ac97_write: 001c = 0002 pxa2xx_ac97_write: 001c = 1802 pxa2xx_ac97_write: 001e = 0800 pxa2xx_ac97_write: 0006 = 0081 pxa2xx_ac97_write: 0002 = 0080

** run alsamixer, set PCM->speaker on: ** pxa2xx_ac97_write: 000c = af08

# aplay /stuff/400Hz-wav.wav +hpipaq214_startup() hpipaq214-audio: Enabling iPAQ Speaker... hpipaq214_startup, gpio96 -> on -hpipaq214_startup()

Playing WAVE '/stuff/400Hz-wav.wav' : Signed 16 bit Little Endian, Rate 44100 Hz, Mono pxa2xx_ac97_write: 002a = 0411 pxa2xx_ac97_write: 002c = ac44 DAPM: Path Widget 'DAC Inv Mux 2': off --> on DAPM: Path Widget 'Out 4 Mux': off --> on DAPM: Path Widget 'Left Speaker Out Mux': off --> on DAPM: DAC Widget 'Right DAC': off --> on (w->active==1) pxa2xx_ac97_write: 003c = 3abf DAPM: DAC Widget 'Left DAC': off --> on (w->active==1) pxa2xx_ac97_write: 003c = 3a3f DAPM: Path Widget 'AC97 Mixer': off --> on DAPM: Path Widget 'Speaker Mixer': off --> on pxa2xx_ac97_write: 003c = 3a3d DAPM: Path Widget 'Out 4': off --> on pxa2xx_ac97_write: 003e = efff DAPM: Path Widget 'Left Speaker': off --> on pxa2xx_ac97_write: 003e = eeff freq changed, set PCD to 5 (LCCR3 = 04700005, LCCR4 = 80000000) DAPM: Path Widget 'iPAQ Speaker': off --> on pxa2xx_ac97_write: 003c = 1a3d hpipaq214_shutdown, gpio96 -> off

** aplay exits. **

** ... few seconds delay ... **

DAPM: Path Widget 'iPAQ Speaker': on --> off DAPM: Path Widget 'Out 4': on --> off pxa2xx_ac97_write: 003e = feff DAPM: Path Widget 'Left Speaker': on --> off pxa2xx_ac97_write: 003e = ffff DAPM: Path Widget 'AC97 Mixer': on --> off DAPM: Path Widget 'Speaker Mixer': on --> off pxa2xx_ac97_write: 003c = 1a3f DAPM: Path Widget 'Right DAC': on --> off pxa2xx_ac97_write: 003c = 1a7f DAPM: Path Widget 'Left DAC': on --> off pxa2xx_ac97_write: 003c = 1aff DAPM: Path Widget 'DAC Inv Mux 2': on --> off DAPM: Path Widget 'Out 4 Mux': on --> off DAPM: Path Widget 'Left Speaker Out Mux': on --> off pxa2xx_ac97_write: 003c = 1aff pxa2xx_ac97_write: 0026 = 0000

** all quiet **

# # # amixer cset numid=62 1 pxa2xx_ac97_write: 000c = af09 numid=62,iface=MIXER,name='Speaker Mixer PCM Playback Swit' ; type=BOOLEAN,access=rw---,values=1 : values=on

# aplay /stuff/400Hz-wav.wav +hpipaq214_startup() hpipaq214-audio: Enabling iPAQ Speaker... hpipaq214_startup, gpio96 -> on -hpipaq214_startup()

Playing WAVE '/stuff/400Hz-wav.wav' : Signed 16 bit Little Endian, Rate 44100 Hz, Mono freq changed, set PCD to 5 (LCCR3 = 04700005, LCCR4 = 80000000) pxa2xx_ac97_write: 002a = 0411 pxa2xx_ac97_write: 002c = ac44 DAPM: DAC Widget 'Right DAC': off --> off (w->active==1) DAPM: DAC Widget 'Left DAC': off --> off (w->active==1) pxa2xx_ac97_write: 003c = 1aff hpipaq214_shutdown, gpio96 -> off # # pxa2xx_ac97_write: 003c = 1aff pxa2xx_ac97_write: 0026 = 0000