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| author | David S. Miller <davem@davemloft.net> | 2016-08-30 00:54:02 -0400 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2016-08-30 00:54:02 -0400 |
| commit | 6abdd5f5935fff978f950561f3c5175eb34dad73 (patch) | |
| tree | 6f3ed3a4f4af9e74436ec9355ebf8201357f1c40 /drivers/gpu/drm/i915/intel_fbc.c | |
| parent | 0b498a52778368ff501557d68c7b50878ab1701e (diff) | |
| parent | e4e98c460ad38c78498622a164fd5ef09a2dc9cb (diff) | |
| download | op-kernel-dev-6abdd5f5935fff978f950561f3c5175eb34dad73.zip op-kernel-dev-6abdd5f5935fff978f950561f3c5175eb34dad73.tar.gz | |
Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net
All three conflicts were cases of simple overlapping
changes.
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/gpu/drm/i915/intel_fbc.c')
| -rw-r--r-- | drivers/gpu/drm/i915/intel_fbc.c | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/drivers/gpu/drm/i915/intel_fbc.c b/drivers/gpu/drm/i915/intel_fbc.c index 6a7ad3e..3836a1c 100644 --- a/drivers/gpu/drm/i915/intel_fbc.c +++ b/drivers/gpu/drm/i915/intel_fbc.c @@ -1230,12 +1230,29 @@ static int intel_sanitize_fbc_option(struct drm_i915_private *dev_priv) if (i915.enable_fbc >= 0) return !!i915.enable_fbc; + if (!HAS_FBC(dev_priv)) + return 0; + if (IS_BROADWELL(dev_priv)) return 1; return 0; } +static bool need_fbc_vtd_wa(struct drm_i915_private *dev_priv) +{ +#ifdef CONFIG_INTEL_IOMMU + /* WaFbcTurnOffFbcWhenHyperVisorIsUsed:skl,bxt */ + if (intel_iommu_gfx_mapped && + (IS_SKYLAKE(dev_priv) || IS_BROXTON(dev_priv))) { + DRM_INFO("Disabling framebuffer compression (FBC) to prevent screen flicker with VT-d enabled\n"); + return true; + } +#endif + + return false; +} + /** * intel_fbc_init - Initialize FBC * @dev_priv: the i915 device @@ -1253,6 +1270,9 @@ void intel_fbc_init(struct drm_i915_private *dev_priv) fbc->active = false; fbc->work.scheduled = false; + if (need_fbc_vtd_wa(dev_priv)) + mkwrite_device_info(dev_priv)->has_fbc = false; + i915.enable_fbc = intel_sanitize_fbc_option(dev_priv); DRM_DEBUG_KMS("Sanitized enable_fbc value: %d\n", i915.enable_fbc); |
