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path: root/drivers/gpu/drm/nouveau/dispnv50/disp.c
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Diffstat (limited to 'drivers/gpu/drm/nouveau/dispnv50/disp.c')
-rw-r--r--drivers/gpu/drm/nouveau/dispnv50/disp.c6
1 files changed, 6 insertions, 0 deletions
diff --git a/drivers/gpu/drm/nouveau/dispnv50/disp.c b/drivers/gpu/drm/nouveau/dispnv50/disp.c
index e7874877da85..1ed242070001 100644
--- a/drivers/gpu/drm/nouveau/dispnv50/disp.c
+++ b/drivers/gpu/drm/nouveau/dispnv50/disp.c
@@ -257,6 +257,12 @@ nv50_dmac_create(struct nvif_device *device, struct nvif_object *disp,
dmac->push->end = dmac->push->bgn;
dmac->max = 0x1000/4 - 1;
+ /* EVO channels are affected by a HW bug where the last 12 DWORDs
+ * of the push buffer aren't able to be used safely.
+ */
+ if (disp->oclass < GV100_DISP)
+ dmac->max -= 12;
+
args->pushbuf = nvif_handle(&dmac->_push.mem.object);
ret = nv50_chan_create(device, disp, oclass, head, data, size,