gma500: introduce the framebuffer support code

We support 2D acceleration on some devices but we try and do tricks with
the GTT as a starting point as this is far faster. The GTT logic could be
improved further but for most display sizes it already makes a pretty good
decision.

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

drivers/gpu/drm/gma500/framebuffer.h

@@ -0,0 +1,48 @@
+/*
+ * Copyright (c) 2008-2011, Intel Corporation
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License along with
+ * this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Authors:
+ *      Eric Anholt <eric@anholt.net>
+ *
+ */
+
+#ifndef _FRAMEBUFFER_H_
+#define _FRAMEBUFFER_H_
+
+#include <drm/drmP.h>
+#include <drm/drm_fb_helper.h>
+
+#include "psb_drv.h"
+
+struct psb_framebuffer {
+	struct drm_framebuffer base;
+	struct address_space *addr_space;
+	struct fb_info *fbdev;
+	struct gtt_range *gtt;
+	bool vm_map;		/* True if we must undo a vm_map_ram */
+};
+
+struct psb_fbdev {
+	struct drm_fb_helper psb_fb_helper;
+	struct psb_framebuffer pfb;
+};
+
+#define to_psb_fb(x) container_of(x, struct psb_framebuffer, base)
+
+extern int psb_intel_connector_clones(struct drm_device *dev, int type_mask);
+
+#endif
+