At Mon, 29 Jun 2009 13:10:53 +0100, Daniel Drake wrote: > > Hi, > > I'm working on some sound issues with the new OLPC XO-1.5 alpha board. > This laptop is now based on a VIA VX855 chipset and our board includes a > CX20582-10Q HDA codec. We are running kernel v2.6.30. > > We have a few issues, which are: > > 1. Volume range is ridiculous, you can go all the way down to -74dB > gain. Beyond -42dB you can barely hear anything from the speakers, and > I note that all my other systems only go down as far as -46.5dB. > > 2. No microphone automute. The internal microphone continues recording > sound while there is an external one plugged in. The generic parser doesn't support this. It gives only a few basic functionalities, so far. > 3. No speaker automute. The internal speakers continue playing sound > while there are headphones plugged in. Ditto. > 4. Mixer arrangement is odd. There are 3 microphones: Mic, Mic 1, and > Mic 2. Mic (the default) records nothing. Mic 1 and Mic 2 both seem to > behave the same, and record from both internal and external microphones. A similar issue. Likely a problem of the generic parser. > I looked into adding some quirks into patch_conexant.c to hopefully > solve some of the above. However I note that there is no support for the > CX20582, hence the generic HDA parser is being used. How has support for > the other CX chips been developed -- are datasheets always required? Ideally, yes. If the codec tree looks similar as other Conexant codecs, you can adapt patch_conexant.c... Takashi _______________________________________________ Alsa-devel mailing list Alsa-devel@xxxxxxxxxxxxxxxx http://mailman.alsa-project.org/mailman/listinfo/alsa-devel
