[Nouveau] [RFC PATCH 19/29] secboot/acr352: reset PMU after secboot

[Karol Herbst]

This is needed for using Nouveaus PMU image after performing secboot. This will
be helpfull for Maxwell2 reclocking on boards without externally controlled
fans like on most laptops or fanless boards.

Signed-off-by: Karol Herbst <karolherbst at gmail.com>
---
 drm/nouveau/nvkm/subdev/secboot/acr_r352.c | 13 +++++++++++++
 1 file changed, 13 insertions(+)

diff --git a/drm/nouveau/nvkm/subdev/secboot/acr_r352.c b/drm/nouveau/nvkm/subdev/secboot/acr_r352.c
index a7213542..00095ef8 100644
--- a/drm/nouveau/nvkm/subdev/secboot/acr_r352.c
+++ b/drm/nouveau/nvkm/subdev/secboot/acr_r352.c
@@ -924,6 +924,19 @@ acr_r352_bootstrap(struct acr_r352 *acr, struct nvkm_secboot *sb)
 		}
 	}
 
+	/* reset the PMU if needed */
+	if (acr->base.boot_falcon == NVKM_SECBOOT_FALCON_PMU &&
+	    !nvkm_secboot_is_managed(sb, NVKM_SECBOOT_FALCON_PMU)) {
+		struct nvkm_pmu *pmu = subdev->device->pmu;
+		if (pmu) {
+			ret = nvkm_subdev_init(&pmu->subdev);
+			if (ret < 0) {
+				nvkm_error(subdev, "Failed to reset PMU\n");
+				return ret;
+			}
+		}
+	}
+
 	return 0;
 }
 
-- 
2.14.1