> From: Mark Brown [mailto:broonie@xxxxxxxxxxxxxxxxxxxxxxxxxxx] > > On Fri, Feb 22, 2008 at 05:39:54PM +0100, Alexandre BOUIN wrote: > > > Using ASoC layer, I'd like to perform this example behaviour with my > widgets > > : > > - 1 output mixer MIXOUT is connected to 2 outputs OUT1 and OUT2 > > - OUT1 and OUT2 can be powered independently > > This seems easy, but atm while one is powered, the other is powered > too. > > I may be misunderstanding what you're doing here but I suspect that > you need to use snd_soc_dapm_set_endpoint() to mark the outputs that > are > not in use as disconnected. If you do that then then DAPM will not > power up the relevant output path. > > You can do this at any point at run time - see sound/soc/pxa/tosa.c for > an example of this. I've used tosa board as an example. Maybe I've done something wrong but when I play sound files, both amplifier are powered together. After playing this track, both amplifier are shutdown together. As it should be an audio path problem, I detail you my audio path here : - 1 SND_SOC_DAPM_MIXER is connected to 2 SND_SOC_DAPM_PGA with power control. - each PGA is connected to an SND_SOC_DAPM_OUTPUT - according to tosa example : - first OUTPUT is connected to a SND_SOC_DAPM_HP defined as endpoint - second OUTPUT is connected to a SND_SOC_DAPM_SPK defined as endpoint this SPK is set disconnected in my tosa_ac97_init -like function Using DPAM debug traces, I've notice that both PGAs are powered regardless of their ON/OFF status. Regards, Alex. _______________________________________________ Alsa-devel mailing list Alsa-devel@xxxxxxxxxxxxxxxx http://mailman.alsa-project.org/mailman/listinfo/alsa-devel
