29 May
2012
29 May
'12
6:18 a.m.
On Tue, 2012-05-29 at 13:14 +0800, zhangfei gao wrote:
When debugging with putting snd_dmaengine_pcm_open to probe or pcm_new, there is issue. snd_dmaengine_pcm_open -> snd_pcm_hw_constraint_integer(substream->runtime,
SNDRV_PCM_HW_PARAM_PERIODS); The runtime is only exist at runtime. So if using soc-dmaengine, I am afraid the snd_dmaengine_pcm_open has to be put in open instead of probe.
I think you got it wrong, the snd_dmaengine_pcm_open needs to be called from your CPU pcm_open. See other examples how this is used in other drivers.
--
~Vinod