Re: [PATCH v6 2/2] mtd: rawnand: meson: add support for Amlogic NAND flash controller

[Miquel Raynal <miquel.raynal@xxxxxxxxxxx>]

Hi Liang,

Liang Yang <liang.yang@xxxxxxxxxxx> wrote on Thu, 15 Nov 2018 19:25:07
+0800:

> Hi Boris,
> 
> I have implemented dma access base on these helpers you provided below.
> we prepare to send v7 version now, so when will these helpers be pushed?

Thanks for your work. You can send the v7 so we will have a look at the
overall driver; but since we raised the DMA buffers issue we had a
discussion with Boris about how to handle them and I think we are going
to adopt the same solution as Wolfram in the I2C subsystem: manual
flagging. Sadly, this is probably the best we can do to ensure proper
DMA support.

There is nothing set is stone yet but I started a small rework to
handle MTD operations differently (and add a DMA_SAFE flag), you can
have a look there [1]. Don't base your work on it for now as it is just
a preliminary version, subject to big changes.

[1] https://github.com/miquelraynal/linux/commits/dma-safe-buffers

Thanks,
Miquèl

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