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authorRonald G. Minnich <rminnich@google.com>2013-04-23 10:59:11 -0700
committerStefan Reinauer <stefan.reinauer@coreboot.org>2013-07-10 02:39:28 +0200
commitb2893a0169ce603926bf13465432a15c4526de97 (patch)
tree6c5bd8c303154406da53fd76a24aff081ac52694 /src/include
parent3fb30eeb147fecb4124b63c353a7b8aac61d4c2a (diff)
downloadcoreboot-b2893a0169ce603926bf13465432a15c4526de97.tar.xz
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>
Diffstat (limited to 'src/include')
-rw-r--r--src/include/edid.h4
-rw-r--r--src/include/vbe.h117
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