On Tue, Jun 01, 2010 at 01:30:27PM +1000, Stuart Longland wrote: > Hi Eric, > On Fri, May 28, 2010 at 07:55:19AM +0200, Eric Bénard wrote: > > Hi Stuart, > Well, over the last few days I've been looking closely at the signals > generated. Especially this morning... yesterday, I managed to get some > sound out of the CODEC when operating in I²S master mode (yes, I have a > patch that I need to clean up first). > > What I observed is that despite being configured for I²S master, what I > infact saw, was more like DSP mode, with a 1-bit frame sync pulse. The > remainder of my experimentation has been using the DSP modes of both MCU > and CODEC. Well, I managed to get the CODEC working as the I²S master, and managed to get good quality audio. The cause of my earlier DMA issues: not enabling DMA in the SSI device flags. I guess I assumed this was the default. Now I just have to get the audio level up to something that's reasonable for the application ... the volume knob is somewhere amongst these registers, now I just have to find it and turn it up (and make it accessible via ALSA). I'll look at cleaning up this driver and submitting it for further work. -- Stuart Longland (aka Redhatter, VK4MSL) .'''. Gentoo Linux/MIPS Cobalt and Docs Developer '.'` : . . . . . . . . . . . . . . . . . . . . . . .'.' http://dev.gentoo.org/~redhatter :.' I haven't lost my mind... ...it's backed up on a tape somewhere. _______________________________________________ Alsa-devel mailing list Alsa-devel@xxxxxxxxxxxxxxxx http://mailman.alsa-project.org/mailman/listinfo/alsa-devel
