diff options
Diffstat (limited to 'drivers/gpu/drm')
| -rw-r--r-- | drivers/gpu/drm/vmwgfx/vmwgfx_drv.c | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/drivers/gpu/drm/vmwgfx/vmwgfx_drv.c b/drivers/gpu/drm/vmwgfx/vmwgfx_drv.c index f47ff2c0546..a6e8f687fa6 100644 --- a/drivers/gpu/drm/vmwgfx/vmwgfx_drv.c +++ b/drivers/gpu/drm/vmwgfx/vmwgfx_drv.c @@ -209,6 +209,7 @@ static int vmw_driver_load(struct drm_device *dev, unsigned long chipset) { struct vmw_private *dev_priv; int ret; + uint32_t svga_id; dev_priv = kzalloc(sizeof(*dev_priv), GFP_KERNEL); if (unlikely(dev_priv == NULL)) { @@ -239,6 +240,16 @@ static int vmw_driver_load(struct drm_device *dev, unsigned long chipset) dev_priv->mmio_start = pci_resource_start(dev->pdev, 2); mutex_lock(&dev_priv->hw_mutex); + + vmw_write(dev_priv, SVGA_REG_ID, SVGA_ID_2); + svga_id = vmw_read(dev_priv, SVGA_REG_ID); + if (svga_id != SVGA_ID_2) { + ret = -ENOSYS; + DRM_ERROR("Unsuported SVGA ID 0x%x\n", svga_id); + mutex_unlock(&dev_priv->hw_mutex); + goto out_err0; + } + dev_priv->capabilities = vmw_read(dev_priv, SVGA_REG_CAPABILITIES); if (dev_priv->capabilities & SVGA_CAP_GMR) { |