Provide support for setting up the framebuffer from EDID

Add three functions to edid.c:

void set_vbe_mode_info_valid(struct edid *edid, uintptr_t fb_addr)
takes an edid and uintptr_t, and fills in a static lb_framebuffer struct
as well as setting the static vbe_valid to 1 unless some problem
is found in the edid. The intent here is that this could be called from
the native graphics setup code on both ARM and x86.

int vbe_mode_info_valid(void)
returns value of the static vbe_valid.

void fill_lb_framebuffer(struct lb_framebuffer *framebuffer)
copies the static edid_fb to lb_framebuffer.

There is now a common vbe.h in src/include, removed the two special ones.

In general, graphics in coreboot is a mess, but graphics is always a
mess.  We don't have a clean way to try two different ways to turn on
a device and use the one that works. One battle at a time. Overall,
things are much better.

The best part: this code would also work for ARM, which also uses EDID.

Change-Id: Id23eb61498b331d44ab064b8fb4cb10f07cff7f3
Signed-off-by: Ronald G. Minnich <rminnich@google.com>
Signed-off-by: Gabe Black <gabeblack@chromium.org>
Reviewed-on: http://review.coreboot.org/3636
Tested-by: build bot (Jenkins)
Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>

src/device/oprom/include/vbe.h

@@ -1,117 +0,0 @@
-/******************************************************************************
- * Copyright (c) 2004, 2008 IBM Corporation
- * Copyright (c) 2009 Pattrick Hueper <phueper@hueper.net>
- * All rights reserved.
- * This program and the accompanying materials
- * are made available under the terms of the BSD License
- * which accompanies this distribution, and is available at
- * http://www.opensource.org/licenses/bsd-license.php
- *
- * Contributors:
- *     IBM Corporation - initial implementation
- *****************************************************************************/
-
-// these structs are for input from and output to OF
-typedef struct {
-	u8 display_type;	// 0=NONE, 1= analog, 2=digital
-	u16 screen_width;
-	u16 screen_height;
-	u16 screen_linebytes;	// bytes per line in framebuffer, may be more than screen_width
-	u8 color_depth;	// color depth in bpp
-	u32 framebuffer_address;
-	u8 edid_block_zero[128];
-} __attribute__ ((__packed__)) screen_info_t;
-
-typedef struct {
-	u8 signature[4];
-	u16 size_reserved;
-	u8 monitor_number;
-	u16 max_screen_width;
-	u8 color_depth;
-} __attribute__ ((__packed__)) screen_info_input_t;
-
-// these structs only store a subset of the VBE defined fields
-// only those needed.
-typedef struct {
-	char signature[4];
-	u16 version;
-	u8 *oem_string_ptr;
-	u32 capabilities;
-	u16 video_mode_list[256];	// lets hope we never have more than 256 video modes...
-	u16 total_memory;
-} vbe_info_t;
-
-typedef struct {
-	u16 mode_attributes; // 00
-	u8 win_a_attributes; // 02
-	u8 win_b_attributes; // 03
-	u16 win_granularity; // 04
-	u16 win_size;        // 06
-	u16 win_a_segment;   // 08
-	u16 win_b_segment;   // 0a
-	u32 win_func_ptr;    // 0c
-	u16 bytes_per_scanline; // 10
-	u16 x_resolution;    // 12
-	u16 y_resolution;    // 14
-	u8 x_charsize;       // 16
-	u8 y_charsize;       // 17
-	u8 number_of_planes; // 18
-	u8 bits_per_pixel;   // 19
-	u8 number_of_banks;  // 20
-	u8 memory_model;     // 21
-	u8 bank_size;        // 22
-	u8 number_of_image_pages; // 23
-	u8 reserved_page;
-	u8 red_mask_size;
-	u8 red_mask_pos;
-	u8 green_mask_size;
-	u8 green_mask_pos;
-	u8 blue_mask_size;
-	u8 blue_mask_pos;
-	u8 reserved_mask_size;
-	u8 reserved_mask_pos;
-	u8 direct_color_mode_info;
-	u32 phys_base_ptr;
-	u32 offscreen_mem_offset;
-	u16 offscreen_mem_size;
-	u8 reserved[206];
-} __attribute__ ((__packed__)) vesa_mode_info_t;
-
-typedef struct {
-	u16 video_mode;
-	union {
-		vesa_mode_info_t vesa;
-		u8 mode_info_block[256];
-	};
-	// our crap
-	//u16 attributes;
-	//u16 linebytes;
-	//u16 x_resolution;
-	//u16 y_resolution;
-	//u8 x_charsize;
-	//u8 y_charsize;
-	//u8 bits_per_pixel;
-	//u8 memory_model;
-	//u32 framebuffer_address;
-} vbe_mode_info_t;
-
-typedef struct {
-	u8 port_number;	// i.e. monitor number
-	u8 edid_transfer_time;
-	u8 ddc_level;
-	u8 edid_block_zero[128];
-} vbe_ddc_info_t;
-
-struct lb_framebuffer;
-
-void vbe_set_graphics(void);
-// A way to check if mode information collected by vbe_set_graphics is valid
-// and fill_lb_framebuffer will have real information to use.
-int vbe_mode_info_valid(void);
-void vbe_textmode_console(void);
-void fill_lb_framebuffer(struct lb_framebuffer *framebuffer);
-
-#define VESA_GET_INFO		0x4f00
-#define VESA_GET_MODE_INFO	0x4f01
-#define VESA_SET_MODE		0x4f02
-

src/device/oprom/realmode/x86.c

@@ -29,7 +29,7 @@
 #include <delay.h>
 #include <pc80/i8259.h>
 #include "x86.h"
-#include "vbe.h"
+#include <vbe.h>
 #include <lib/jpeg.h>
 /* we use x86emu's register file representation */
 #include <x86emu/regs.h>

src/device/oprom/yabel/compat/functions.c

@@ -18,7 +18,7 @@
 #include <device/device.h>
 #include "../debug.h"
 #include "../biosemu.h"
-#include "../vbe.h"
+#include <vbe.h>
 #include "../compat/time.h"
 
 #define VMEM_SIZE (1024 * 1024) /* 1 MB */

src/device/oprom/yabel/vbe.h

@@ -1,23 +0,0 @@
-/******************************************************************************
- * Copyright (c) 2004, 2008 IBM Corporation
- * All rights reserved.
- * This program and the accompanying materials
- * are made available under the terms of the BSD License
- * which accompanies this distribution, and is available at
- * http://www.opensource.org/licenses/bsd-license.php
- *
- * Contributors:
- *     IBM Corporation - initial implementation
- *****************************************************************************/
-
-#ifndef _BIOSEMU_VBE_H_
-#define _BIOSEMU_VBE_H_
-
-struct lb_framebuffer;
-
-void vbe_set_graphics(void);
-int vbe_mode_info_valid(void);
-void fill_lb_framebuffer(struct lb_framebuffer *framebuffer);
-void vbe_textmode_console(void);
-
-#endif