Dne Friday 01 of August 2008 19:27:24 Nitin Mahajan napsal(a): > HI! > > --- On Fri, 1/8/08, Mark Brown <broonie@xxxxxxxxxxxxxxxxxxxxxxxxxxx> wrote: > > From: Mark Brown <broonie@xxxxxxxxxxxxxxxxxxxxxxxxxxx> > > Subject: Re: WM9712 Not Giving output > > To: "Nitin Mahajan" <nitinm76@xxxxxxxxx> > > Cc: alsa-devel@xxxxxxxxxxxxxxxx, "Manuel" <mano@xxxxxxxxxxxxxxxxxxxxxxx> > > Date: Friday, 1 August, 2008, 9:32 PM > > On Fri, Aug 01, 2008 at 08:31:03AM -0700, Nitin Mahajan > > > > wrote: > > > I am using a WM9712 codec chip with the AC97 > > > > controller on AMD AU1250. > > > > > Linux kernel version 2.6.24.2. > > > > > > On AC97 controller's side, I can see the DMA > > > > happening on the host > > > > > processor, interrupts also coming. > > > > This suggests a mixer configuration problem. > > > > > On the mixer front, I did unmute and set the vol to > > > > max for PCM and > > > > > Headphone. I did not find any Master control with this > > > > chip. Isn't > > > > > there any master control with this chip? > > > > No. > > If Master is not there, logically are the enough for playback? > > amixer set 'PCM' 255 unmute > amixer set 'Headphone' 255 unmute > > > > Can some one please throw more light on the Mixer > > > > part, specific to > > > > > this chip. > > > > > > What Mixer controls do I need to set with what values > > > > for playback and > > > > > capture respectively with this chip? > > > > Check the configuration of the Left HP Mixer and Right HP > > Mixer PCM > > Playback switches. These should be enabled in order to > > play back via > > the headphone output. > > While writing the reply , the hardware is not with me. > But I wil check these tommorow. > > > If you still can't get audio output with that please > > send a copy of your > > mixer configuration - run the command > > > > alsactl store -f mixer-config > > > > to write a file 'mixer-config' with this > > information in it. Please > > also check your kernel log from when the driver is loaded > > and when you > > configure the mixer. > > > > There is documentation of the audio paths supported by the > > chip in the > > I saw the figure in the datasheet, its quite explainatory, as to which > registers are involved in which path. > > > datasheet, available from: > > > > http://www.wolfsonmicro.com/products/WM9712/ > > > > > > and you may find the audio route mappings in the WM9712 > > driver useful to > > refer to - the 'audio_map' table in the driver > > which shows how the parts > > of the device are connected. The format is { destination, > > control, > > source }. > > Thanks and regards > > -Nitin > > Send instant messages to your online friends http://uk.messenger.yahoo.com > _______________________________________________ > Alsa-devel mailing list > Alsa-devel@xxxxxxxxxxxxxxxx > http://mailman.alsa-project.org/mailman/listinfo/alsa-devel Hi, try searching the mailing list for "[PATCH] wm9712 mono mixer". That may help you. _______________________________________________ Alsa-devel mailing list Alsa-devel@xxxxxxxxxxxxxxxx http://mailman.alsa-project.org/mailman/listinfo/alsa-devel
