[Intel-gfx] [PATCH v2 0/4] iommu/vt-d: Disable igfx iommu superpage on bxt/skl/glk

[Ville Syrjala]

From: Ville Syrjälä <ville.syrjala at linux.intel.com>

I ran into some kind of fail with VT-d superpage on Geminlake igfx,
so without any better ideas let's just disable it.

Additionally Skylake/Broxton igfx have known issues with VT-d
superpage as well, so let's disable it there as well. This should
let us re-enable frame buffer compression (FBC) for some extra
power savings when the display is on.

v2: disable superpage only for the igfx iommu

Cc: David Woodhouse <dwmw2 at infradead.org>
Cc: Lu Baolu <baolu.lu at linux.intel.com>
Cc: iommu at lists.linux-foundation.org

Ville Syrjälä (4):
  iommu/vt-d: Disable superpage for Geminilake igfx
  iommu/vt-d: Disable superpage for Broxton igfx
  iommu/vt-d: Disable superpage for Skylake igfx
  drm/i915/fbc: Allow FBC + VT-d on SKL/BXT

 drivers/gpu/drm/i915/display/intel_fbc.c | 16 ------
 drivers/iommu/intel/iommu.c              | 68 +++++++++++++++++++++++-
 2 files changed, 67 insertions(+), 17 deletions(-)

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2.31.1