[PATCH] fbcon: Console Rotation - Add support for 180-degree console rotation

Add support for 180-degree (upside down) rotation of the console.  To
activate, boot with:

fbcon=rotate:2
Signed-off-by: Antonino Daplas <adaplas@pol.net>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

drivers/video/console/Makefile

@@ -32,7 +32,7 @@ ifeq ($(CONFIG_FB_TILEBLITTING),y)
 obj-$(CONFIG_FRAMEBUFFER_CONSOLE)     += tileblit.o
 endif
 ifeq ($(CONFIG_FRAMEBUFFER_CONSOLE_ROTATION),y)
-obj-$(CONFIG_FRAMEBUFFER_CONSOLE)     += fbcon_rotate.o fbcon_cw.o
+obj-$(CONFIG_FRAMEBUFFER_CONSOLE)     += fbcon_rotate.o fbcon_cw.o fbcon_ud.o
 endif
 
 obj-$(CONFIG_FB_STI)              += sticore.o font.o

drivers/video/console/fbcon_rotate.c

@@ -102,6 +102,9 @@ void fbcon_set_rotate(struct fbcon_ops *ops)
 	case FB_ROTATE_CW:
 		fbcon_rotate_cw(ops);
 		break;
+	case FB_ROTATE_UD:
+		fbcon_rotate_ud(ops);
+		break;
 	}
 }
 EXPORT_SYMBOL(fbcon_set_rotate);

drivers/video/console/fbcon_rotate.h

@@ -100,4 +100,5 @@ static inline void rotate_ccw(const char *in, char *out, u32 width, u32 height)
 }
 
 extern void fbcon_rotate_cw(struct fbcon_ops *ops);
+extern void fbcon_rotate_ud(struct fbcon_ops *ops);
 #endif