[Nouveau] [PATCH 9/9] perf: change pcie speed on pstate change

Karol Herbst
2015-10-12T20:27:50Z

drm/nouveau/nvkm/subdev/clk/base.c | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/drm/nouveau/nvkm/subdev/clk/base.c
b/drm/nouveau/nvkm/subdev/clk/base.c
index 7ae4f26..4e5122b 100644
--- a/drm/nouveau/nvkm/subdev/clk/base.c
+++ b/drm/nouveau/nvkm/subdev/clk/base.c
@@ -176,6 +176,7 @@ nvkm_pstate_prog(struct nvkm_clk *clk, int pstatei)
 {
 	struct nvkm_subdev *subdev = &clk->subdev;
 	struct nvkm_ram *ram = subdev->device->fb->ram;
+	struct nvkm_pci *pci = subdev->device->pci;
 	struct nvkm_pstate *pstate;
 	int ret, idx = 0;

@@ -187,6 +188,12 @@ nvkm_pstate_prog(struct nvkm_clk *clk, int pstatei)
 	nvkm_debug(subdev, "setting performance state %d\n", pstatei);
 	clk->pstate = pstatei;

+	if (pci) {
+		ret = nvkm_pci_set_pcie_link(pci, pstate->pcie_speed,
pstate->pcie_width);
+		if (ret < 0)
+			nvkm_error(subdev, "failed changing pcie speed with: %i\n", ret);
+	}
+
 	if (ram && ram->func->calc) {
 		int khz = pstate->base.domain[nv_clk_src_mem];
 		do {
--
2.6.1