Hello,
I'm working with a board with TI dm365 processor and using McBSP pheripheral to send sound samples to a GSM module. The kernel version is 2.6.32.17 and the ASoC driver state is based on this commit http://arago-project.org/git/projects/?p=linux-davinci.git;a=commit;h=a4c8ea...
I have configured the hw interface to send two words in a frame on 8000Hz, this is working fine. When playing mono waveforms I noticed that all samples are doubled (it should be correct because snd_pcm_hardware has SNDRV_PCM_INFO_INTERLEAVED flag) but except the first one, that is send only once. This leads to a state when one sample in each frame is delayed. Unfortunately I'm not an expert on ALSA and ASoC and I'm not sure whether this problem rises in the core of ALSA or only in the driver for davinci dm365 (probably somewhere in the dma handling).
Could please someone give me some hint where to find the source of the problem? I hope I described the situation enough...
best regards Jan