Re: [PATCH 07/17] spi: dw: Add Tx/Rx finish wait methods to DMA

[Mark Brown]

On Wed, May 13, 2020 at 02:35:55PM +0300, Serge Semin wrote:
> On Fri, May 08, 2020 at 06:30:23PM +0100, Mark Brown wrote:

> > > +	while (dw_spi_dma_tx_busy(dws) && retry--)
> > > +		ndelay(ns);

> > How deep can the FIFO be with this IP - could we end up ndelay()ing for
> > non-trivial amounts of time?

> According to the DW APB SSI db it can be up to 256 transfer words. So the delay
> should be trivial.

Yes, that should be fine.

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