drm/nouveau/top: add function to lookup interrupt mask for a given device

Signed-off-by: Ben Skeggs <bskeggs@redhat.com>

1 files changed, 16 insertions, 0 deletions

diff --git a/drivers/gpu/drm/nouveau/nvkm/subdev/top/base.c b/drivers/gpu/drm/nouveau/nvkm/subdev/top/base.c
index 19fbcfdb08e8..fe063d5728e2 100644
--- a/drivers/gpu/drm/nouveau/nvkm/subdev/top/base.c
+++ b/drivers/gpu/drm/nouveau/nvkm/subdev/top/base.c
@@ -57,6 +57,22 @@ nvkm_top_reset(struct nvkm_device *device, enum nvkm_devidx index)
 }
 
 u32
+nvkm_top_intr_mask(struct nvkm_device *device, enum nvkm_devidx devidx)
+{
+	struct nvkm_top *top = device->top;
+	struct nvkm_top_device *info;
+
+	if (top) {
+		list_for_each_entry(info, &top->device, head) {
+			if (info->index == devidx && info->intr >= 0)
+				return BIT(info->intr);
+		}
+	}
+
+	return 0;
+}
+
+u32
 nvkm_top_intr(struct nvkm_device *device, u32 intr, u64 *psubdevs)
 {
 	struct nvkm_top *top = device->top;