gma500: wide framebuffer memory

If we set a small text framebuffer and have a bigger scanout then we want
to send black not random bits for the overscan.

Signed-off-by: Alan Cox <alan@linux.intel.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>

1 files changed, 2 insertions, 0 deletions

diff --git a/drivers/gpu/drm/gma500/framebuffer.c b/drivers/gpu/drm/gma500/framebuffer.c
index c9fe4bdeb681..4fc0d08bd61b 100644
--- a/drivers/gpu/drm/gma500/framebuffer.c
+++ b/drivers/gpu/drm/gma500/framebuffer.c
@@ -408,6 +408,8 @@ static int psbfb_create(struct psb_fbdev *fbdev,
                         return -ENOMEM;
         }
 
+        memset(dev_priv->vram_addr + backing->offset, 0, size);
+
         mutex_lock(&dev->struct_mutex);
 
         info = framebuffer_alloc(0, device);