drm/nouveau/pmu/tu102-: prepare for GSP-RM

- disable PMU completely when GSP-RM detected
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20230918202149.4343-19-skeggsb@gmail.com

drivers/gpu/drm/nouveau/nvkm/subdev/pmu/gp102.c

@@ -23,6 +23,8 @@
  */
 #include "priv.h"
 
+#include <subdev/gsp.h>
+
 static const struct nvkm_falcon_func
 gp102_pmu_flcn = {
 	.disable = gm200_flcn_disable,
@@ -54,5 +56,8 @@ int
 gp102_pmu_new(struct nvkm_device *device, enum nvkm_subdev_type type, int inst,
 	      struct nvkm_pmu **ppmu)
 {
+	if (nvkm_gsp_rm(device->gsp))
+		return -ENODEV;
+
 	return nvkm_pmu_new_(gp102_pmu_fwif, device, type, inst, ppmu);
 }