[Intel-gfx] [PATCH] drm/i915/tgl: Put HDC flush pipe_control bit in the right dword

[D Scott Phillips]

D Scott Phillips <d.scott.phillips at intel.com> writes:

> Previously we set HDC_PIPELINE_FLUSH in dword 1 of gen12
> pipe_control commands. HDC Pipeline flush actually resides in
> dword 0, and the bit we were setting in dword 1 was Indirect State
> Pointers Disable, which invalidates indirect state in the render
> context. This causes failures for userspace, as things like push
> constant state gets invalidated.
>
> Cc: Mika Kuoppala <mika.kuoppala at linux.intel.com>
> Cc: Chris Wilson <chris at chris-wilson.co.uk>
> Signed-off-by: D Scott Phillips <d.scott.phillips at intel.com>

also,

Fixes: 4aa0b5d457f5 ("drm/i915/tgl: Add HDC Pipeline Flush")