[PATCH] radeon/vdpau: don't report VDPAU for r300

Alex Deucher alexdeucher at gmail.com
Tue Oct 14 09:22:42 PDT 2014

On Tue, Oct 14, 2014 at 10:51 AM, David Heidelberger
<david.heidelberger at ixit.cz> wrote:
> I noticed in logs VDPAU support, then I tried compile mesa with vdpau,
> enable it and of course it was useless. Anyway, I'm not alone, when you
> check forums, you'll notice other guys also tried.
> If it could be accepted at this moment or re-enabled r300 support it would
> be great.
> As I understood, VDPAU for r300 would support only MPEG2 (not much used
> these days) and Marek marked it as useless. Any comments on that?

On chips without UVD, video decode was done using the 3D engine which
pretty much limited it to MPEG2.  It was basically just MC offload.
R3xx-R5xx had robust enough shader ISAs to implement MC offload
directly.  R1xx and R2xx chips had a special MC mode you could enable
in the 3D engine to accelerate MC offload.


> If there will be r300 vdpau support, I'll update patch to disable it only
> for < r300
> David
> On 10/14/2014 05:50 AM, Michel Dänzer wrote:
>> On 13.10.2014 01:10, David Heidelberger wrote:
>>> VDPAU support has been removed for r300 as useless, but message in
>>> Xorg.log remained.
>>> (II) RADEON(0): [DRI2] VDPAU driver: r300
>>> Remove this message to prevent confusion.
>> I don't really see the problem with keeping it. Some people are arguing
>> that Mesa should build r300 VDPAU again for VDPAU presentation support; in
>> that case it would be nice if we didn't have to revert this change again. :)
>> OTOH it might make sense to do this to prevent the message from being
>> printed for r100 and r200, which will most likely never get any kind of
>> VDPAU support.
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