Add a function that allows us to query whether a given subdev is
currently enabled or not.
Signed-off-by: Alexandre Courbot <acour...@nvidia.com>
---
drm/nouveau/include/nvkm/subdev/mc.h | 1 +
drm/nouveau/nvkm/subdev/mc/base.c | 10 ++++++++++
2 files changed, 11 insertions(+), 0 deletions(-)
diff --git a/drm/nouveau/include/nvkm/subdev/mc.h
b/drm/nouveau/include/nvkm/subdev/mc.h
index 27d25b18d85c..e68ba636741b 100644
--- a/drm/nouveau/include/nvkm/subdev/mc.h
+++ b/drm/nouveau/include/nvkm/subdev/mc.h
@@ -9,6 +9,7 @@ struct nvkm_mc {
void nvkm_mc_enable(struct nvkm_device *, enum nvkm_devidx);
void nvkm_mc_disable(struct nvkm_device *, enum nvkm_devidx);
+bool nvkm_mc_enabled(struct nvkm_device *, enum nvkm_devidx);
void nvkm_mc_reset(struct nvkm_device *, enum nvkm_devidx);
void nvkm_mc_intr(struct nvkm_device *, bool *handled);
void nvkm_mc_intr_unarm(struct nvkm_device *);
diff --git a/drm/nouveau/nvkm/subdev/mc/base.c
b/drm/nouveau/nvkm/subdev/mc/base.c
index 6b25e25f9eba..09f669ac6630 100644
--- a/drm/nouveau/nvkm/subdev/mc/base.c
+++ b/drm/nouveau/nvkm/subdev/mc/base.c
@@ -161,6 +161,16 @@ nvkm_mc_enable(struct nvkm_device *device, enum
nvkm_devidx devidx)
}
}
+bool
+nvkm_mc_enabled(struct nvkm_device *device, enum nvkm_devidx devidx)
+{
+ u64 pmc_enable = nvkm_mc_reset_mask(device, false, devidx);
+
+ return (pmc_enable != 0) &&
+ ((nvkm_rd32(device, 0x000200) & pmc_enable) == pmc_enable);
+}
+
+
static int
nvkm_mc_fini(struct nvkm_subdev *subdev, bool suspend)
{
--
git-series 0.8.10
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