From mboxrd@z Thu Jan 1 00:00:00 1970 From: Jeremy Moles Subject: EP93XX/EDB9315A Audio Issue Date: Tue, 26 Aug 2014 19:18:52 -0400 Message-ID: <53FD15DC.3040301@emperorlinux.com> Mime-Version: 1.0 Content-Transfer-Encoding: 7bit Return-path: Sender: linux-embedded-owner@vger.kernel.org List-ID: Content-Type: text/plain; charset="us-ascii"; format="flowed" To: linux-embedded@vger.kernel.org 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. :)