| /* |
| * This file is part of the coreboot project. |
| * |
| * Copyright 2013 Google Inc. |
| * |
| * This program is free software; you can redistribute it and/or modify |
| * it under the terms of the GNU General Public License as published by |
| * the Free Software Foundation; version 2 of the License. |
| * |
| * This program is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| * GNU General Public License for more details. |
| */ |
| |
| #ifndef EDID_H |
| #define EDID_H |
| |
| #include <stdint.h> |
| #include "commonlib/coreboot_tables.h" |
| |
| enum edid_modes { |
| EDID_MODE_640x480_60Hz, |
| EDID_MODE_720x480_60Hz, |
| EDID_MODE_1280x720_60Hz, |
| EDID_MODE_1920x1080_60Hz, |
| NUM_KNOWN_MODES, |
| |
| EDID_MODE_AUTO |
| }; |
| |
| struct edid_mode { |
| const char *name; |
| unsigned int pixel_clock; |
| int lvds_dual_channel; |
| unsigned int refresh; |
| unsigned int ha; |
| unsigned int hbl; |
| unsigned int hso; |
| unsigned int hspw; |
| unsigned int hborder; |
| unsigned int va; |
| unsigned int vbl; |
| unsigned int vso; |
| unsigned int vspw; |
| unsigned int vborder; |
| unsigned char phsync; |
| unsigned char pvsync; |
| unsigned int x_mm; |
| unsigned int y_mm; |
| }; |
| |
| /* structure for communicating EDID information from a raw EDID block to |
| * higher level functions. |
| * The size of the data types is not critical, so we leave them as |
| * unsigned int. We can move more into into this struct as needed. |
| */ |
| |
| #define EDID_ASCII_STRING_LENGTH 13 |
| |
| struct edid { |
| /* These next three things used to all be called bpp. |
| * Merriment ensued. The identifier |
| * 'bpp' is herewith banished from our |
| * Kingdom. |
| */ |
| /* How many bits in the framebuffer per pixel. |
| * Under all reasonable circumstances, it's 32. |
| */ |
| unsigned int framebuffer_bits_per_pixel; |
| /* On the panel, how many bits per color? |
| * In almost all cases, it's 6 or 8. |
| * The standard allows for much more! |
| */ |
| unsigned int panel_bits_per_color; |
| /* On the panel, how many bits per pixel. |
| * On Planet Earth, there are three colors |
| * per pixel, but this is convenient to have here |
| * instead of having 3*panel_bits_per_color |
| * all over the place. |
| */ |
| unsigned int panel_bits_per_pixel; |
| /* used to compute timing for graphics chips. */ |
| struct edid_mode mode; |
| u8 mode_is_supported[NUM_KNOWN_MODES]; |
| unsigned int link_clock; |
| /* 3 variables needed for coreboot framebuffer. |
| * In most cases, they are the same as the ha |
| * and va variables, but not always, as in the |
| * case of a 1366 wide display. |
| */ |
| u32 x_resolution; |
| u32 y_resolution; |
| u32 bytes_per_line; |
| |
| int hdmi_monitor_detected; |
| char ascii_string[EDID_ASCII_STRING_LENGTH + 1]; |
| char manufacturer_name[3 + 1]; |
| }; |
| |
| enum edid_status { |
| EDID_CONFORMANT, |
| EDID_NOT_CONFORMANT, |
| EDID_ABSENT, |
| }; |
| |
| /* Defined in src/lib/edid.c */ |
| int decode_edid(unsigned char *edid, int size, struct edid *out); |
| void edid_set_framebuffer_bits_per_pixel(struct edid *edid, int fb_bpp, |
| int row_byte_alignment); |
| void set_vbe_mode_info_valid(const struct edid *edid, uintptr_t fb_addr); |
| void set_vbe_framebuffer_orientation(enum lb_fb_orientation orientation); |
| int set_display_mode(struct edid *edid, enum edid_modes mode); |
| |
| #endif /* EDID_H */ |