[Intel-gfx] [PATCH] drm/i915: Disable the BLT on pre-production SNB hardware

[Eric Anholt]

Chris Wilson <chris at chris-wilson.co.uk> writes:

> It never quite worked despite the numerous workarounds, yet I still see
> people trying to use this hardware and filing bug reports. As we no
> longer even try to implement the workarounds, since 6a233c78878
> (drm/i915/ringbuffer: kill snb blt workaround), simply disable the ring.
>
> v2: Add a message to inform the user about the limited capabilities of
> their pre-production hardware.

Where by "performance will be degraded" we mean "GL won't work".  :)

Still, better than just trying to blindly continue on.

Reviewed-by: Eric Anholt <eric at anholt.net>

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