EP93XX/EDB9315A Audio Issue
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. :)
Dear Jeremy Moles,
Quoted 18 lines · Jeremy Moles
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.
Quoted 4 lines
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. :)
Instead of linux-embedded@, you probably want to ask this question to the Linux ARM Kernel Mailing list (LAKML), plus the alsa-devel mailing list, plus the maintainers of the EP93xx platform in the kernel.
This will make sure your question reaches the right persons.
Best regards,
Thomas
Signature · 3 lines
Thomas Petazzoni, CTO, Free Electrons Embedded Linux, Kernel and Android engineering http://free-electrons.com