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SubjectRe: [Linaro-mm-sig] [RFC v3 0/2] Introduce DMA buffer sharing mechanism
On Wed, Dec 21, 2011 at 3:56 AM, Rob Clark <> wrote:
> On Tue, Dec 20, 2011 at 2:20 PM, Dave Airlie <> wrote:
>>> I think this is a really good v1 version of dma_buf. It contains all the
>>> required bits (with well-specified semantics in the doc patch) to
>>> implement some basic use-cases and start fleshing out the integration with
>>> various subsystem (like drm and v4l). All the things still under
>>> discussion like
>>> - userspace mmap support
>>> - more advanced (and more strictly specified) coherency models
>>> - and shared infrastructure for implementing exporters
>>> are imo much clearer once we have a few example drivers at hand and a
>>> better understanding of some of the insane corner cases we need to be able
>>> to handle.
>>> And I think any risk that the resulting clarifications will break a basic
>>> use-case is really minimal, so I think it'd be great if this could go into
>>> 3.3 (maybe as some kind of staging/experimental infrastructure).
>>> Hence for both patches:
>>> Reviewed-by: Daniel Vetter <>
>> Yeah I'm with Daniel, I like this one, I can definitely build the drm
>> buffer sharing layer on top of this.
>> How do we see this getting merged? I'm quite happy to push it to Linus
>> if we don't have an identified path, though it could go via a Linaro
>> tree as well.
>> so feel free to add:
>> Reviewed-by: Dave Airlie <>
> fwiw, patches to share buffers between drm and v4l2 are here:
> (need a bit of cleanup before the vb2 patches are submitted.. but that
> is unrelated to the dmabuf patches)
> so,
> Reviewed-and-Tested-by: Rob Clark <>
Thanks Daniel, Dave, and Rob!
>> Dave.
>> --
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