[Nouveau] [PATCH 5/5] pci: restore the boot pcie link speed on fini

[Karol Herbst]

fixes runtime suspend on my gp107

Signed-off-by: Karol Herbst <kherbst at redhat.com>
---
 drm/nouveau/nvkm/subdev/pci/base.c | 2 ++
 drm/nouveau/nvkm/subdev/pci/pcie.c | 8 ++++++++
 drm/nouveau/nvkm/subdev/pci/priv.h | 1 +
 3 files changed, 11 insertions(+)

diff --git a/drm/nouveau/nvkm/subdev/pci/base.c b/drm/nouveau/nvkm/subdev/pci/base.c
index b6ebee6f..d9fb5a83 100644
--- a/drm/nouveau/nvkm/subdev/pci/base.c
+++ b/drm/nouveau/nvkm/subdev/pci/base.c
@@ -90,6 +90,8 @@ nvkm_pci_fini(struct nvkm_subdev *subdev, bool suspend)
 
 	if (pci->agp.bridge)
 		nvkm_agp_fini(pci);
+	else if (pci_is_pcie(pci->pdev))
+		nvkm_pcie_fini(pci);
 
 	return 0;
 }
diff --git a/drm/nouveau/nvkm/subdev/pci/pcie.c b/drm/nouveau/nvkm/subdev/pci/pcie.c
index 727b5d6a..00c07fd8 100644
--- a/drm/nouveau/nvkm/subdev/pci/pcie.c
+++ b/drm/nouveau/nvkm/subdev/pci/pcie.c
@@ -118,6 +118,14 @@ nvkm_pcie_init(struct nvkm_pci *pci)
 	return 0;
 }
 
+int
+nvkm_pcie_fini(struct nvkm_pci *pci)
+{
+	if (!IS_ERR_VALUE(pci->pcie.def_speed))
+		return nvkm_pcie_set_link(pci, pci->pcie.def_speed, 16);
+	return 0;
+}
+
 int
 nvkm_pcie_set_link(struct nvkm_pci *pci, enum nvkm_pcie_speed speed, u8 width)
 {
diff --git a/drm/nouveau/nvkm/subdev/pci/priv.h b/drm/nouveau/nvkm/subdev/pci/priv.h
index dc3ae3cd..e7744671 100644
--- a/drm/nouveau/nvkm/subdev/pci/priv.h
+++ b/drm/nouveau/nvkm/subdev/pci/priv.h
@@ -62,4 +62,5 @@ int gk104_pcie_version_supported(struct nvkm_pci *);
 int nvkm_pcie_oneinit(struct nvkm_pci *);
 int nvkm_pcie_preinit(struct nvkm_pci *);
 int nvkm_pcie_init(struct nvkm_pci *);
+int nvkm_pcie_fini(struct nvkm_pci *);
 #endif
-- 
2.20.1