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Date:   Wed, 30 Aug 2023 16:33:41 +0200
From:   Christoph Hellwig <hch@lst.de>
To:     Tomasz Figa <tfiga@chromium.org>
Cc:     Christoph Hellwig <hch@lst.de>,
        Robin Murphy <robin.murphy@arm.com>,
        Anle Pan <anle.pan@nxp.com>, m.szyprowski@samsung.com,
        mchehab@kernel.org, linux-media@vger.kernel.org,
        linux-kernel@vger.kernel.org, hui.fang@nxp.com,
        Jason Gunthorpe <jgg@ziepe.ca>
Subject: Re: [PATCH] media: videobuf2-dma-sg: limit the sg segment size
Message-ID: <20230830143341.GA25574@lst.de>
References: <20230828075420.2009568-1-anle.pan@nxp.com> <CAAFQd5Cn3xQroyYtC+m+pk1jOE5i3H+FGr-y8zqhaf0Yo5p-1Q@mail.gmail.com> <deb735ce-7de1-e59a-9de4-1365b374b417@arm.com> <20230829150442.GA3929@lst.de> <CAAFQd5CiHXvsJugSi+hXY9ESsmxUzBzmbhF6G48iVsOcL5eMtQ@mail.gmail.com>
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On Wed, Aug 30, 2023 at 12:47:57PM +0900, Tomasz Figa wrote:
> Do we see anything replacing it widely anywhere on the short-middle
> term horizon? I think we could possibly migrate vb2 to use that new
> thing internally and just provide some compatibility X to scatterlist
> conversion function for the drivers.

Jason said at LSF/MM that he had a prototype for a mapping API that
takes a phys/len array as input and dma_addr/len a output, which really
is the right thing to do, especially for dmabuf.

Jason, what's the status of your work?