EP93XX/EDB9315A Audio Issue

[Jeremy Moles <jeremy@emperorlinux.com>]

I have what I believe to be a stock/demo EDB9315A board here, and am in 
the process of upgrading a client from their 2.6.21.5 kernel to 3.15 (or 
thereabouts).

So far, everything has gone fantastic, with 95% of the SoC on its 
peripherals working without any issues. However, I _AM_ having an issue 
with sound. At the most basic level, attempting to use sound in any way 
generates the following messages:

     ep93xx-dma ep93xx-dma-m2p: coherent DMA mask is unset
     ep93xx-i2s ep93xx-i2s: ASoC: ep93xx-i2s hw params failed: -12

Again, as far as I know (and the client insists) this machine is a stock 
EDB9315A board (part of EP93XX mach). I've spent a good deal of time 
looking through some of the DMA, SPI, I2S, and ASoC code, but have had 
no luck. The previous 2.6.21.5 used a single monolithic patch that 
managed to enable this device, but in the newer kernel it does not work.

I know I'm not providing a great deal of information, but i wanted to 
ask the lists in conjunction with my own debugging, hoping to possibly 
solicit a vector of attack from someone experienced with the 
architecture. :)