Merge branch 'drm-next' of git://people.freedesktop.org/~airlied/linux

Pull drm updates from Dave Airlie:
 "One of the smaller drm -next pulls in ages!

  Ben (nouveau) has a rewrite in progress but we decided to leave it
  stew for another cycle, so just some fixes from him.

   - radeon: lots of documentation work, fixes, more ring and locking
     changes, pcie gen2, more dp fixes.
   - i915: haswell features, gpu reset fixes, /dev/agpgart removal on
     machines that we never used it on, more VGA/HDP fix., more DP fixes
   - drm core: cleanups from Daniel, sis 64-bit fixes, range allocator
     colouring.

  but yeah fairly quiet merge this time, probably because I missed half
  of it!"

Trivial add-add conflict in include/linux/pci_regs.h

* 'drm-next' of git://people.freedesktop.org/~airlied/linux: (255 commits)
  drm/nouveau: init vblank requests list
  drm/nv50: extend vblank semaphore to generic dmaobj + offset pair
  drm/nouveau: mark most of our ioctls as deprecated, move to compat layer
  drm/nouveau: move current gpuobj code out of nouveau_object.c
  drm/nouveau/gem: fix object reference leak in a failure path
  drm/nv50: rename INVALID_QUERY_OR_TEXTURE error to INVALID_OPERATION
  drm/nv84: decode PCRYPT errors
  drm/nouveau: dcb table quirk for fdo#50830
  nouveau: Fix alignment requirements on src and dst addresses
  drm/i915: unbreak lastclose for failed driver init
  drm/i915: Set the context before setting up regs for the context.
  drm/i915: constify mode in crtc_mode_fixup
  drm/i915/lvds: ditch ->prepare special case
  drm/i915: dereferencing an error pointer
  drm/i915: fix invalid reference handling of the default ctx obj
  drm/i915: Add -EIO to the list of known errors for __wait_seqno
  drm/i915: Flush the context object from the CPU caches upon switching
  drm/radeon: fix dpms on/off on trinity/aruba v2
  drm/radeon: on hotplug force link training to happen (v2)
  drm/radeon: fix hotplug of DP to DVI|HDMI passive adapters (v2)
  ...

1 files changed, 49 insertions, 0 deletions

diff --git a/drivers/gpu/drm/drm_pci.c b/drivers/gpu/drm/drm_pci.c
index 13f3d936472f..5320364582ce 100644
--- a/drivers/gpu/drm/drm_pci.c
+++ b/drivers/gpu/drm/drm_pci.c
@@ -465,3 +465,52 @@ void drm_pci_exit(struct drm_driver *driver, struct pci_driver *pdriver)
 	DRM_INFO("Module unloaded\n");
 }
 EXPORT_SYMBOL(drm_pci_exit);
+
+int drm_pcie_get_speed_cap_mask(struct drm_device *dev, u32 *mask)
+{
+	struct pci_dev *root;
+	int pos;
+	u32 lnkcap, lnkcap2;
+
+	*mask = 0;
+	if (!dev->pdev)
+		return -EINVAL;
+
+	if (!pci_is_pcie(dev->pdev))
+		return -EINVAL;
+
+	root = dev->pdev->bus->self;
+
+	pos = pci_pcie_cap(root);
+	if (!pos)
+		return -EINVAL;
+
+	/* we've been informed via and serverworks don't make the cut */
+	if (root->vendor == PCI_VENDOR_ID_VIA ||
+	    root->vendor == PCI_VENDOR_ID_SERVERWORKS)
+		return -EINVAL;
+
+	pci_read_config_dword(root, pos + PCI_EXP_LNKCAP, &lnkcap);
+	pci_read_config_dword(root, pos + PCI_EXP_LNKCAP2, &lnkcap2);
+
+	lnkcap &= PCI_EXP_LNKCAP_SLS;
+	lnkcap2 &= 0xfe;
+
+	if (lnkcap2) { /* PCIE GEN 3.0 */
+		if (lnkcap2 & PCI_EXP_LNKCAP2_SLS_2_5GB)
+			*mask |= DRM_PCIE_SPEED_25;
+		if (lnkcap2 & PCI_EXP_LNKCAP2_SLS_5_0GB)
+			*mask |= DRM_PCIE_SPEED_50;
+		if (lnkcap2 & PCI_EXP_LNKCAP2_SLS_8_0GB)
+			*mask |= DRM_PCIE_SPEED_80;
+	} else {
+		if (lnkcap & 1)
+			*mask |= DRM_PCIE_SPEED_25;
+		if (lnkcap & 2)
+			*mask |= DRM_PCIE_SPEED_50;
+	}
+
+	DRM_INFO("probing gen 2 caps for device %x:%x = %x/%x\n", root->vendor, root->device, lnkcap, lnkcap2);
+	return 0;
+}
+EXPORT_SYMBOL(drm_pcie_get_speed_cap_mask);