Re: [PATCH v2 2/2] spi: spi-ti-qspi: Use bounce buffer if read buffer is not DMA'ble

From: Mark Brown
Date: Fri Jun 23 2017 - 08:13:00 EST

On Tue, Jun 20, 2017 at 03:15:34PM +0530, Vignesh R wrote:
> On Friday 16 June 2017 09:24 PM, Cyrille Pitchen wrote:

> > Then in a new series, if nobody has started to work on this topic yet,
> > we could propose a generic solution using a bounce buffer at the SPI
> > core level. however we first need to think how we could do this.

> One of the questions that was hovering around when this issue was
> discussed last time around was where should the code to detect whether
> or not to use bounce buffer reside? Some extension to generic DMA APIs
> or SPI drivers or somewhere else?

It seems like it's a generic DMA thing - presumably it's going to be an
issue for other devices as well sometimes.

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