drm/vmwgfx: Enable 3D for new hardware version

Signed-off-by: Thomas Hellstrom <thellstrom@vmware.com>
Reviewed-by: Brian Paul <brianp@vmware.com>
Reviewed-by: Zack Rusin <zackr@vmware.com>

1 files changed, 17 insertions, 0 deletions

diff --git a/drivers/gpu/drm/vmwgfx/vmwgfx_fifo.c b/drivers/gpu/drm/vmwgfx/vmwgfx_fifo.c
index 01baffd90549..6ccd993e26bf 100644
--- a/drivers/gpu/drm/vmwgfx/vmwgfx_fifo.c
+++ b/drivers/gpu/drm/vmwgfx/vmwgfx_fifo.c
@@ -35,6 +35,23 @@ bool vmw_fifo_have_3d(struct vmw_private *dev_priv)
         uint32_t fifo_min, hwversion;
         const struct vmw_fifo_state *fifo = &dev_priv->fifo;
 
+        if (!(dev_priv->capabilities & SVGA_CAP_3D))
+                return false;
+
+        if (dev_priv->capabilities & SVGA_CAP_GBOBJECTS) {
+                uint32_t result;
+
+                if (!dev_priv->has_mob)
+                        return false;
+
+                mutex_lock(&dev_priv->hw_mutex);
+                vmw_write(dev_priv, SVGA_REG_DEV_CAP, SVGA3D_DEVCAP_3D);
+                result = vmw_read(dev_priv, SVGA_REG_DEV_CAP);
+                mutex_unlock(&dev_priv->hw_mutex);
+
+                return (result != 0);
+        }
+
         if (!(dev_priv->capabilities & SVGA_CAP_EXTENDED_FIFO))
                 return false;