drm/nvc0/fifo: kick channels off during suspend

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

1 files changed, 16 insertions, 0 deletions

diff --git a/drivers/gpu/drm/nouveau/nvc0_fifo.c b/drivers/gpu/drm/nouveau/nvc0_fifo.c
index 55a4245c1a67..2bd0511511e4 100644
--- a/drivers/gpu/drm/nouveau/nvc0_fifo.c
+++ b/drivers/gpu/drm/nouveau/nvc0_fifo.c
@@ -240,6 +240,22 @@ nvc0_fifo_load_context(struct nouveau_channel *chan)
 int
 nvc0_fifo_unload_context(struct drm_device *dev)
 {
+        struct drm_nouveau_private *dev_priv = dev->dev_private;
+        int i;
+
+        for (i = 0; i < 128; i++) {
+                if (!(nv_rd32(dev, 0x003004 + (i * 4)) & 1))
+                        continue;
+
+                nv_mask(dev, 0x003004 + (i * 4), 0x00000001, 0x00000000);
+                nv_wr32(dev, 0x002634, i);
+                if (!nv_wait(dev, 0x002634, 0xffffffff, i)) {
+                        NV_INFO(dev, "PFIFO: kick ch %d failed: 0x%08x\n",
+                                i, nv_rd32(dev, 0x002634));
+                        return -EBUSY;
+                }
+        }
+
         return 0;
 }