[Intel-gfx] [PATCH] libdrm execute on different ring buffer

[Eric Anholt]

On Fri, 28 May 2010 13:55:37 +0800, Zou Nan hai <nanhai.zou at intel.com> wrote:
> introduce an new API for command to execute on
> different ring buffer.
> This is need for VAAPI to decode H.264 on
> BSD ring buffer

How do you detect that the kernel supports the new path?  You need to be
doing a getparam or something to find out.  Otherwise you'll just
blindly submit media commands down the render pipe on old kernels, since
the flags field will be ignored.
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