-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 Somebody in the thread at some point said: | On Tue, Mar 03, 2009 at 11:08:35AM +0000, Andy Green wrote: | |> This sounds great, but how does DAPM integrate with the analogue path |> usage which is the way we passthru audio for normal telephony? Last |> time I looked the ALSA side power management took a PCM-centric view of |> the world, it believes that PCM open was the sign we needed power some |> kind of "on" power state. | | No, that's never been the case - ASoC has always handled full power path | management. If there is a complete path from a connected input to a | connected output then that path will be powered up - if this weren't the | case none of the paths in the codec would be powered for your bypass | paths so there would be nothing for the speaker to amplify.
I'm thinking about Vref driver impedence for example, unless I am suffering from false memory syndrome this is managed as I described, such that we are at 500K impedence when using only analogue paths. | The handling of the digital streams provides automatic power managment | for the DACs and ADCs so that their paths aren't powered when they | aren't in use. How does the power management of the amp improve by DAPM then, just the sequencing during suspend and resume? - -Andy -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.9 (GNU/Linux) Comment: Using GnuPG with Fedora - http://enigmail.mozdev.org iEYEARECAAYFAkmtFQAACgkQOjLpvpq7dMqOggCeNa5fhUp6yRM14t8MLgnWd+v2 Y8sAn35qDQhJciAgBO07W8BSq6IRwUnn =lXDS -----END PGP SIGNATURE-----
