From 1f9c3e1f07e39c8af3bf42236fc553b5bb0f83f1 Mon Sep 17 00:00:00 2001 From: Martin Ambrose Date: Mon, 24 May 2010 14:34:01 -0700 Subject: fbdev: da8xx/omap-l1xx: implement double buffering This work includes the following: - Implement handler for FBIO_WAITFORVSYNC ioctl. - Allocate the data and palette buffers separately. A consequence of this is that the palette and data loading is now done in different phases. And that the LCD must be disabled temporarily after the palette is loaded but this will only happen once after init and each time the palette is changed. I think this is OK. - Allocate two (ping and pong) framebuffers from memory. - Add pan_display handler which toggles the LCDC DMA registers between the ping and pong buffers. Signed-off-by: Martin Ambrose Cc: Chaithrika U S Cc: Sudhakar Rajashekhara Cc: Krzysztof Helt Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- include/video/da8xx-fb.h | 1 + 1 file changed, 1 insertion(+) (limited to 'include/video') diff --git a/include/video/da8xx-fb.h b/include/video/da8xx-fb.h index 89d43b3d4cb9..6316cdabf73f 100644 --- a/include/video/da8xx-fb.h +++ b/include/video/da8xx-fb.h @@ -99,6 +99,7 @@ struct lcd_sync_arg { #define FBIPUT_COLOR _IOW('F', 6, int) #define FBIPUT_HSYNC _IOW('F', 9, int) #define FBIPUT_VSYNC _IOW('F', 10, int) +#define FBIO_WAITFORVSYNC _IOW('F', 0x20, u_int32_t) #endif /* ifndef DA8XX_FB_H */ -- cgit v1.2.2