drm/nve0: allow specification of channel engine type in abi16 call

Previously, if either vram/gart handles were specified as ~0, the ioctl
call would fail.  In order to hack engine selection into the ioctl for
kepler, we now define (fb_ctxdma_handle == ~0) to mean "engine mask is
in tt_ctxdma_handle".

This approach also allows new userspace to detect lack of support for
non-PGRAPH channels on older kernels.

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

1 files changed, 1 insertions, 1 deletions

diff --git a/drivers/gpu/drm/nouveau/nouveau_drm.c b/drivers/gpu/drm/nouveau/nouveau_drm.c
index f62dbd2733bf..919186c4651b 100644
--- a/drivers/gpu/drm/nouveau/nouveau_drm.c
+++ b/drivers/gpu/drm/nouveau/nouveau_drm.c
@@ -148,7 +148,7 @@ nouveau_accel_init(struct nouveau_drm *drm)
                         NV_ERROR(drm, "failed to create ce channel, %d\n", ret);
 
                 arg0 = NVE0_CHANNEL_IND_ENGINE_GR;
-                arg1 = 0;
+                arg1 = 1;
         } else {
                 arg0 = NvDmaFB;
                 arg1 = NvDmaTT;