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

Ville Syrjala
2021-07-09T16:48:00Z

From: Ville Syrjälä <ville.syrjala@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.

Cc: David Woodhouse <dwmw2@infradead.org>
Cc: Lu Baolu <baolu.lu@linux.intel.com>
Cc: iommu@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 | 44 ++++++++++++++++++++++++
2 files changed, 44 insertions(+), 16 deletions(-)

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2.31.1