drm/vmwgfx: Correctly detect 3D
Signed-off-by: Jakob Bornecrantz <jakob@vmware.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
diff --git a/drivers/gpu/drm/vmwgfx/vmwgfx_fifo.c b/drivers/gpu/drm/vmwgfx/vmwgfx_fifo.c
index f7d5f70..4157547 100644
--- a/drivers/gpu/drm/vmwgfx/vmwgfx_fifo.c
+++ b/drivers/gpu/drm/vmwgfx/vmwgfx_fifo.c
@@ -29,6 +29,25 @@
#include "drmP.h"
#include "ttm/ttm_placement.h"
+bool vmw_fifo_have_3d(struct vmw_private *dev_priv)
+{
+ __le32 __iomem *fifo_mem = dev_priv->mmio_virt;
+ uint32_t fifo_min, hwversion;
+
+ fifo_min = ioread32(fifo_mem + SVGA_FIFO_MIN);
+ if (fifo_min <= SVGA_FIFO_3D_HWVERSION * sizeof(unsigned int))
+ return false;
+
+ hwversion = ioread32(fifo_mem + SVGA_FIFO_3D_HWVERSION);
+ if (hwversion == 0)
+ return false;
+
+ if (hwversion < SVGA3D_HWVERSION_WS65_B1)
+ return false;
+
+ return true;
+}
+
int vmw_fifo_init(struct vmw_private *dev_priv, struct vmw_fifo_state *fifo)
{
__le32 __iomem *fifo_mem = dev_priv->mmio_virt;