Messages in this thread | | | Subject | Re: [PATCH] AC97 support for low power codecs | From | Liam Girdwood <> | Date | Tue, 04 Jan 2005 15:27:02 +0000 |
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On Tue, 2005-01-04 at 15:08, Takashi Iwai wrote: > > Does writing RESET on such a codec must be avoided always? > Or can one power up again by writing some values on POWER register? >
Writing RESET causes an AC97 codec to return to it's default state. On some codecs this is state is "power down" and therefore undesirable during a call to probe.
The only way to wake such a codec is via an AC97 warm reset.
Liam
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