Re: [PATCH v2 02/10] dmaengine: imx-sdma: fix spba-bus handling for i.MX8M

Peng Fan
2025-09-12T01:51:18Z

Hi Marco,

On Thu, Sep 11, 2025 at 11:56:43PM +0200, Marco Felsch wrote:
>Starting with i.MX8M* devices there are multiple spba-busses so we can't
>just search the whole DT for the first spba-bus match and take it.
>Instead we need to check for each device to which bus it belongs and
>setup the spba_{start,end}_addr accordingly per sdma_channel.

Could you please explain a bit why it is per sdma_channel, not per sdma_engine?

As I understand, all the channels belong to a sdma engine should use same
spba_{start,end}_addr.

Thanks,
Peng