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
