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>

2 files changed, 121 insertions, 0 deletions

diff --git a/src/include/edid.h b/src/include/edid.h
index 6d76bb7efb..8809cced36 100644
--- a/src/include/edid.h
+++ b/src/include/edid.h
@@ -36,6 +36,8 @@ struct edid {
 	unsigned int nonconformant;
 	unsigned int type;
 	unsigned int bpp;
+	unsigned int xres;
+	unsigned int yres;
 	unsigned int voltage;
 	unsigned int sync;
 	unsigned int xsize_cm;
@@ -62,5 +64,7 @@ struct edid {
 	const char *stereo;
 };
 
+/* Defined in src/lib/edid.c */
 int decode_edid(unsigned char *edid, int size, struct edid *out);
+
 #endif /* EDID_H */
diff --git a/src/include/vbe.h b/src/include/vbe.h
new file mode 100644
index 0000000000..8ad9d2eb31
--- /dev/null
+++ b/src/include/vbe.h
@@ -0,0 +1,117 @@
+/******************************************************************************
+ * 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
+ *****************************************************************************/
+#ifndef VBE_H
+#define VBE_H
+
+#include <boot/coreboot_tables.h>
+// 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;
+
+#define VESA_GET_INFO		0x4f00
+#define VESA_GET_MODE_INFO	0x4f01
+#define VESA_SET_MODE		0x4f02
+
+int vbe_mode_info_valid(void);
+void fill_lb_framebuffer(struct lb_framebuffer *framebuffer);
+void vbe_set_graphics(void);
+void vbe_textmode_console(void);
+
+#endif // VBE_H