Re: [PATCH RESEND 2/2] arm64: dts: rockchip: Add RGA2 support to rk356x

[Shengyu Qu]

Hi, Michael,

> I don't think the GFP_DMA32 flag works with DmaBuf import. The buffer may be
> allocated by some other driver that is able to address more than 4G and
> imported into the RGA driver. In this case, limiting the allocations is not
> enough, but we would still need error handling in the map function for buffers
> that cannot be addressed by the RGA.
>
> I guess we need both, a limit for the allocation and error checking for the
> map.

Maybe you are right.. I haven't digged into v4l2-m2m API, so I'm not 
sure about

it. Seems we need others' help.

Shengyu

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