25 Dec
2014
25 Dec
'14
10:02 a.m.
On 12/25/2014 05:41 AM, Barry Song wrote:
From: Barry Song Baohua.Song@csr.com
preparing cyclic DMA description can fail either due to DMA desc list is full(-ENOMEM), or due to the coming DMA configuration is illegal or not supported by the acting DMA hardware(other ERR codes).
According to the API definition this returns either NULL or a valid descriptor, so the behavior in pcm_dmaengine is correct. Maybe your particular dmaengine driver as a incorrect implementation.
- Lars