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authorTomi Valkeinen <tomi.valkeinen@nokia.com>2009-08-07 12:04:26 +0300
committerTomi Valkeinen <tomi.valkeinen@nokia.com>2009-12-09 12:04:33 +0200
commit640f9ca5fd783393c832f6bb5c56368f4d18b820 (patch)
tree8719e7ed6d05edf3cf106d11fc8b904f26df6c97 /arch
parentafedec183e95bd5e126a7846a644acfdddb86a66 (diff)
OMAP: Add support for VRFB rotation engine
VRFB rotation engine is a block in OMAP2/3 that offers 12 independent contexts that can be used for framebuffer rotation. Each context has a backend area of real memory, where it stores the pixels in undisclosed format. This memory is offered to users via 4 virtual memory areas, which see the same memory area in different rotation angles (0, 90, 180 and 270 degrees). Signed-off-by: Tomi Valkeinen <tomi.valkeinen@nokia.com>
Diffstat (limited to 'arch')
-rw-r--r--arch/arm/plat-omap/include/plat/vrfb.h50
1 files changed, 50 insertions, 0 deletions
diff --git a/arch/arm/plat-omap/include/plat/vrfb.h b/arch/arm/plat-omap/include/plat/vrfb.h
new file mode 100644
index 000000000000..d8a03ced3b10
--- /dev/null
+++ b/arch/arm/plat-omap/include/plat/vrfb.h
@@ -0,0 +1,50 @@
+/*
+ * VRFB Rotation Engine
+ *
+ * Copyright (C) 2009 Nokia Corporation
+ * Author: Tomi Valkeinen <tomi.valkeinen@nokia.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that 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.,
+ * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+ */
+
+#ifndef __OMAP_VRFB_H__
+#define __OMAP_VRFB_H__
+
+#define OMAP_VRFB_LINE_LEN 2048
+
+struct vrfb {
+ u8 context;
+ void __iomem *vaddr[4];
+ unsigned long paddr[4];
+ u16 xres;
+ u16 yres;
+ u16 xoffset;
+ u16 yoffset;
+ u8 bytespp;
+ bool yuv_mode;
+};
+
+extern int omap_vrfb_request_ctx(struct vrfb *vrfb);
+extern void omap_vrfb_release_ctx(struct vrfb *vrfb);
+extern void omap_vrfb_adjust_size(u16 *width, u16 *height,
+ u8 bytespp);
+extern u32 omap_vrfb_min_phys_size(u16 width, u16 height, u8 bytespp);
+extern u16 omap_vrfb_max_height(u32 phys_size, u16 width, u8 bytespp);
+extern void omap_vrfb_setup(struct vrfb *vrfb, unsigned long paddr,
+ u16 width, u16 height,
+ unsigned bytespp, bool yuv_mode);
+extern int omap_vrfb_map_angle(struct vrfb *vrfb, u16 height, u8 rot);
+extern void omap_vrfb_restore_context(void);
+
+#endif /* __VRFB_H */