drm/vmwgfx: Support older hardware.
V2: Fix a couple of typos.
Signed-off-by: Jakob Bornecrantz <jakob@vmware.com>
Signed-off-by: Thomas Hellstrom <thellstrom@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 a8e5445..e6a1eb7 100644
--- a/drivers/gpu/drm/vmwgfx/vmwgfx_fifo.c
+++ b/drivers/gpu/drm/vmwgfx/vmwgfx_fifo.c
@@ -34,6 +34,9 @@
__le32 __iomem *fifo_mem = dev_priv->mmio_virt;
uint32_t fifo_min, hwversion;
+ if (!(dev_priv->capabilities & SVGA_CAP_EXTENDED_FIFO))
+ return false;
+
fifo_min = ioread32(fifo_mem + SVGA_FIFO_MIN);
if (fifo_min <= SVGA_FIFO_3D_HWVERSION * sizeof(unsigned int))
return false;
@@ -48,6 +51,21 @@
return true;
}
+bool vmw_fifo_have_pitchlock(struct vmw_private *dev_priv)
+{
+ __le32 __iomem *fifo_mem = dev_priv->mmio_virt;
+ uint32_t caps;
+
+ if (!(dev_priv->capabilities & SVGA_CAP_EXTENDED_FIFO))
+ return false;
+
+ caps = ioread32(fifo_mem + SVGA_FIFO_CAPABILITIES);
+ if (caps & SVGA_FIFO_CAP_PITCHLOCK)
+ return true;
+
+ return false;
+}
+
int vmw_fifo_init(struct vmw_private *dev_priv, struct vmw_fifo_state *fifo)
{
__le32 __iomem *fifo_mem = dev_priv->mmio_virt;