drm/i915: Use the g4x+ approach on gen2 for handling display stuff around GPU reset
We don't have GPU reset support for gen2, which means the display hardware is unaffected when a GPU hang is handled. However as the ring has in fact stopped, any flips still in the ring will never complete, and thus the display base address updates will never happen. So we really need to fix that up manually just like we do on g4x+. In fact, let's just use intel_has_gpu_reset() instead of IS_GEN2() since that'll also handle cases where someone would disable the GPU reset support on gen3/4 for whatever reason. Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com> Link: http://patchwork.freedesktop.org/patch/msgid/1470428910-12125-5-git-send-email-ville.syrjala@linux.intel.comReviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch>
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