On Sun, 2009-02-22 at 22:47 +0100, Daniel Mack wrote:
Hi,
I'm currently implementing support for a board based on a PXA300 with an I2S codec (CS4270) next to it. Things do work in general, including the setup of the SSP engine and clocks, and when using the OSS compat layer, I can see data on the bus. With the native ALSA API, however, the DMA pointer does not move forward but is stuck at position 8. ALSA's core calls pxa2xx_pcm_pointer() a couple of times and eventually gives up on it. Unfortunately, I don't have a Zylonite board for cross-check; could anyone verify that things are not currently broken in a general way?
My code base is up-to-date to sound-2.6.git/for-2.6.30.
Can't test on my zylonite atm, but static DMA pointers usually mean data is not being clocked out of the SSP FIFO. Can you check you are supplying a BCLK and LRC to the SSP port (if codec is BCLK/LRC master) or have enabled the PXA SSP master mode (if codec slave).
Liam