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Commit 4c1979c8 authored by Jordan Crouse's avatar Jordan Crouse Committed by Linus Torvalds
Browse files

[PATCH] FB: Get the Geode GX frambuffer size from the BIOS 



Use the Geode GX BIOS virtual registers to get the actual size of the
framebuffer.

Signed-off-by: default avatarJordan Crouse <jordan.crouse@amd.com>
Cc: "Antonino A. Daplas" <adaplas@pol.net>
Acked-by: default avatarJames Simmons <jsimmons@infradead.org>
Signed-off-by: default avatarAndrew Morton <akpm@osdl.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@osdl.org>
parent 4437cd1e

drivers/video/geode/display_gx.c

+12 −3
Original line number Original line Diff line number Diff line
@@ -21,10 +21,19 @@ 
#include "geodefb.h"

#include "geodefb.h"

#include "display_gx.h"

#include "display_gx.h"





int gx_frame_buffer_size(void)

unsigned int gx_frame_buffer_size(void)

{

{

	/* Assuming 16 MiB. */

	unsigned int val;

	return 16*1024*1024;



	/* FB size is reported by a virtual register */

	/* Virtual register class = 0x02 */

	/* VG_MEM_SIZE(512Kb units) = 0x00 */



	outw(0xFC53, 0xAC1C);

	outw(0x0200, 0xAC1C);



	val = (unsigned int)(inw(0xAC1E)) & 0xFFl;

	return (val << 19);

}

}





int gx_line_delta(int xres, int bpp)

int gx_line_delta(int xres, int bpp)

drivers/video/geode/display_gx.h

+1 −1
Original line number Original line Diff line number Diff line
@@ -11,7 +11,7 @@ 
#ifndef __DISPLAY_GX_H__

#ifndef __DISPLAY_GX_H__

#define __DISPLAY_GX_H__

#define __DISPLAY_GX_H__





int gx_frame_buffer_size(void);

unsigned int gx_frame_buffer_size(void);

int gx_line_delta(int xres, int bpp);

int gx_line_delta(int xres, int bpp);





extern struct geode_dc_ops gx_dc_ops;

extern struct geode_dc_ops gx_dc_ops;