RE: Re: [PATCH v3 11/14] dmaengine: imx-sdma: fix ecspi1 rx dma not work on i.mx8mm

[Robin Gong]

> -----Original Message-----
> From: Vinod Koul <vkoul@xxxxxxxxxx>
> Sent: 2019年5月21日 12:18
> 
> On 07-05-19, 09:16, Robin Gong wrote:
> > Because the number of ecspi1 rx event on i.mx8mm is 0, the condition
> > check ignore such special case without dma channel enabled, which
> > caused
> > ecspi1 rx works failed. Actually, no need to check event_id0, checking
> > event_id1 is enough for DEV_2_DEV case because it's so lucky that
> > event_id1 never be 0.
> 
> Well is that by chance or design that event_id1 will be never 0?
> 
That's by chance. DEV_2_DEV is just for Audio case and non-zero for event_id1 on current i.MX family.