1 files changed, 14 insertions, 0 deletions

diff --git a/drivers/gpu/drm/nouveau/nouveau_irq.c b/drivers/gpu/drm/nouveau/nouveau_irq.c
index 3b9bad66162a..baa9b3e0b66b 100644
--- a/drivers/gpu/drm/nouveau/nouveau_irq.c
+++ b/drivers/gpu/drm/nouveau/nouveau_irq.c
@@ -211,6 +211,20 @@ nouveau_fifo_irq_handler(struct drm_device *dev)
                                                                 get + 4);
                 }
 
+                if (status & NV_PFIFO_INTR_SEMAPHORE) {
+                        uint32_t sem;
+
+                        status &= ~NV_PFIFO_INTR_SEMAPHORE;
+                        nv_wr32(dev, NV03_PFIFO_INTR_0,
+                                NV_PFIFO_INTR_SEMAPHORE);
+
+                        sem = nv_rd32(dev, NV10_PFIFO_CACHE1_SEMAPHORE);
+                        nv_wr32(dev, NV10_PFIFO_CACHE1_SEMAPHORE, sem | 0x1);
+
+                        nv_wr32(dev, NV03_PFIFO_CACHE1_GET, get + 4);
+                        nv_wr32(dev, NV04_PFIFO_CACHE1_PULL0, 1);
+                }
+
                 if (status) {
                         NV_INFO(dev, "PFIFO_INTR 0x%08x - Ch %d\n",
                                 status, chid);