From b2893a0169ce603926bf13465432a15c4526de97 Mon Sep 17 00:00:00 2001 From: "Ronald G. Minnich" Date: Tue, 23 Apr 2013 10:59:11 -0700 Subject: 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 Signed-off-by: Gabe Black Reviewed-on: http://review.coreboot.org/3636 Tested-by: build bot (Jenkins) Reviewed-by: Stefan Reinauer --- src/include/vbe.h | 117 ++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 117 insertions(+) create mode 100644 src/include/vbe.h (limited to 'src/include/vbe.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 + * 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 +// 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 -- cgit v1.2.3