drm/nv50/pm: wait for all fifo-connected engines to idle before reclocking

Signed-off-by: Martin Peres <martin.peres@labri.fr>
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>

diff --git a/drivers/gpu/drm/nouveau/nv50_pm.c b/drivers/gpu/drm/nouveau/nv50_pm.c
index 0f26326..e677310 100644 (file)
--- a/drivers/gpu/drm/nouveau/nv50_pm.c
+++ b/drivers/gpu/drm/nouveau/nv50_pm.c
@@ -798,6 +798,8 @@ nv50_pm_clocks_set(struct drm_device *dev, void *data)
        nv_mask(dev, 0x002504, 0x00000001, 0x00000001);
        if (!nv_wait(dev, 0x002504, 0x00000010, 0x00000010))
                goto resume;
+       if (!nv_wait(dev, 0x00251c, 0x0000003f, 0x0000003f))
+               goto resume;
 
        /* program memory clock, if necessary - must come before engine clock
         * reprogramming due to how we construct the hwsq scripts in pre()