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32ea06b67e
G4x cursor control registers still allow us to write to the pipe select bits even though cursors are supposed to be fixed to a specific pipe. Bspec tells us that we should only ever write 0 to these bits. Let's follow that recommendation. On ilk+ the bits become hardwired to 0. Also looks like ICL repurposes these bits for some other use, so we had better stop setting them to bogus values there. Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com> Link: https://patchwork.freedesktop.org/patch/msgid/20180130203807.13721-1-ville.syrjala@linux.intel.com Reviewed-by: Mika Kahola <mika.kahola@intel.com>