Nouveau - Dec 2018 - [PATCH] drm/nouveau/falcon: avoid touching registers if engine is off

Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=108980
Signed-off-by: Ilia Mirkin <imirkin at alum.mit.edu>
---
 drivers/gpu/drm/nouveau/nvkm/engine/falcon.c | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/nouveau/nvkm/engine/falcon.c
b/drivers/gpu/drm/nouveau/nvkm/engine/falcon.c
index 816ccaedfc73..8675613e142b 100644
--- a/drivers/gpu/drm/nouveau/nvkm/engine/falcon.c
+++ b/drivers/gpu/drm/nouveau/nvkm/engine/falcon.c
@@ -22,6 +22,7 @@
 #include <engine/falcon.h>
 
 #include <core/gpuobj.h>
+#include <subdev/mc.h>
 #include <subdev/timer.h>
 #include <engine/fifo.h>
 
@@ -107,8 +108,10 @@ nvkm_falcon_fini(struct nvkm_engine *engine, bool suspend)
 		}
 	}
 
-	nvkm_mask(device, base + 0x048, 0x00000003, 0x00000000);
-	nvkm_wr32(device, base + 0x014, 0xffffffff);
+	if (nvkm_mc_enabled(device, engine->subdev.index)) {
+		nvkm_mask(device, base + 0x048, 0x00000003, 0x00000000);
+		nvkm_wr32(device, base + 0x014, 0xffffffff);
+	}
 	return 0;
 }
 
-- 
2.18.1

GF117 appears to use the same register as GK104 (but still with the
general Fermi readout mechanism).

Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=108980
Signed-off-by: Ilia Mirkin <imirkin at alum.mit.edu>
---
 drivers/gpu/drm/nouveau/nvkm/subdev/volt/gf100.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/nouveau/nvkm/subdev/volt/gf100.c
b/drivers/gpu/drm/nouveau/nvkm/subdev/volt/gf100.c
index d9ed6925ca64..d87c2efe67e7 100644
--- a/drivers/gpu/drm/nouveau/nvkm/subdev/volt/gf100.c
+++ b/drivers/gpu/drm/nouveau/nvkm/subdev/volt/gf100.c
@@ -30,11 +30,12 @@ gf100_volt_speedo_read(struct nvkm_volt *volt)
 {
 	struct nvkm_device *device = volt->subdev.device;
 	struct nvkm_fuse *fuse = device->fuse;
+	const u32 speedo_fuse = device->chipset == 0xd7 ? 0x3a8 : 0x1cc;
 
 	if (!fuse)
 		return -EINVAL;
 
-	return nvkm_fuse_read(fuse, 0x1cc);
+	return nvkm_fuse_read(fuse, speedo_fuse);
 }
 
 int
-- 
2.18.1