[Intel-gfx] [PATCH 1/2] drm/i915: Fix PIPE_CONTROL command on Sandybridge

[Eric Anholt]

On Thu, 27 May 2010 10:26:42 +0800, Zhenyu Wang <zhenyuw at linux.intel.com> wrote:
> Sandybridge(Gen6) has new format for PIPE_CONTROL command,
> the flush and post-op control are in dword 1 now. This
> changes command length field for difference between Ironlake
> and Sandybridge.
> 
> I tried to test this with noop request and issue PIPE_CONTROL
> command for each sequence and track notify interrupts, which
> seems work fine. Hopefully we don't need workaround like on
> Ironlake for Sandybridge.
> 
> Signed-off-by: Zhenyu Wang <zhenyuw at linux.intel.com>

I rebased this to drm-intel-next and just chained the if statements
instead of nesting the ironlake code farther down.
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