diff options
Diffstat (limited to 'drivers/gpu/drm/i915/i915_drv.c')
| -rw-r--r-- | drivers/gpu/drm/i915/i915_drv.c | 30 |
1 files changed, 30 insertions, 0 deletions
diff --git a/drivers/gpu/drm/i915/i915_drv.c b/drivers/gpu/drm/i915/i915_drv.c index e6d7a69..b31485a 100644 --- a/drivers/gpu/drm/i915/i915_drv.c +++ b/drivers/gpu/drm/i915/i915_drv.c @@ -443,6 +443,34 @@ static const struct pci_device_id pciidlist[] = { /* aka */ MODULE_DEVICE_TABLE(pci, pciidlist); +static enum intel_pch intel_virt_detect_pch(struct drm_device *dev) +{ + enum intel_pch ret = PCH_NOP; + + /* + * In a virtualized passthrough environment we can be in a + * setup where the ISA bridge is not able to be passed through. + * In this case, a south bridge can be emulated and we have to + * make an educated guess as to which PCH is really there. + */ + + if (IS_GEN5(dev)) { + ret = PCH_IBX; + DRM_DEBUG_KMS("Assuming Ibex Peak PCH\n"); + } else if (IS_GEN6(dev) || IS_IVYBRIDGE(dev)) { + ret = PCH_CPT; + DRM_DEBUG_KMS("Assuming CouarPoint PCH\n"); + } else if (IS_HASWELL(dev) || IS_BROADWELL(dev)) { + ret = PCH_LPT; + DRM_DEBUG_KMS("Assuming LynxPoint PCH\n"); + } else if (IS_SKYLAKE(dev)) { + ret = PCH_SPT; + DRM_DEBUG_KMS("Assuming SunrisePoint PCH\n"); + } + + return ret; +} + void intel_detect_pch(struct drm_device *dev) { struct drm_i915_private *dev_priv = dev->dev_private; @@ -503,6 +531,8 @@ void intel_detect_pch(struct drm_device *dev) dev_priv->pch_type = PCH_SPT; DRM_DEBUG_KMS("Found SunrisePoint LP PCH\n"); WARN_ON(!IS_SKYLAKE(dev)); + } else if (id == INTEL_PCH_P2X_DEVICE_ID_TYPE) { + dev_priv->pch_type = intel_virt_detect_pch(dev); } else continue; |