edid: Library of EDID decode and print
This implements a library for accessing EDID data from an LCD panel. This is used to obtain information about the panel such as its resolution and type. This is a tidied-up version of the original code pulled from https://github.com/ynezz/u-boot-edid. The changes we made are: - removed bit fields in the struct; - removed endianness cases in the struct; - fixed some wrong definitions; - fixed to fit 80 columns; - fixed some code styles. Signed-off-by: Tom Wai-Hong Tam <waihong@chromium.org> Signed-off-by: Simon Glass <sjg@chromium.org>
This commit is contained in:
Tom Wai-Hong Tam
Tom Rini
parent
bf36c5d521
commit
d46b5f7dcb
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@ -188,6 +188,7 @@ COBJS-$(CONFIG_BOOTSTAGE) += bootstage.o
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COBJS-$(CONFIG_CONSOLE_MUX) += iomux.o
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COBJS-y += flash.o
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COBJS-$(CONFIG_CMD_KGDB) += kgdb.o kgdb_stubs.o
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COBJS-$(CONFIG_I2C_EDID) += edid.o
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COBJS-$(CONFIG_KALLSYMS) += kallsyms.o
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COBJS-$(CONFIG_LCD) += lcd.o
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COBJS-$(CONFIG_LYNXKDI) += lynxkdi.o
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@ -0,0 +1,307 @@
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/*
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* Copyright (c) 2012 The Chromium OS Authors.
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*
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* (C) Copyright 2010
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* Petr Stetiar <ynezz@true.cz>
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*
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* See file CREDITS for list of people who contributed to this
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* project.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 of
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* the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
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* MA 02111-1307 USA
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*
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* Contains stolen code from ddcprobe project which is:
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* Copyright (C) Nalin Dahyabhai <bigfun@pobox.com>
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*
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*/
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#include <common.h>
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#include <edid.h>
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#include <linux/ctype.h>
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#include <linux/string.h>
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int edid_check_info(struct edid1_info *edid_info)
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{
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if ((edid_info == NULL) || (edid_info->version == 0))
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return -1;
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if (memcmp(edid_info->header, "\x0\xff\xff\xff\xff\xff\xff\x0", 8))
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return -1;
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if (edid_info->version == 0xff && edid_info->revision == 0xff)
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return -1;
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return 0;
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}
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int edid_get_ranges(struct edid1_info *edid, unsigned int *hmin,
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unsigned int *hmax, unsigned int *vmin,
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unsigned int *vmax)
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{
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int i;
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struct edid_monitor_descriptor *monitor;
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*hmin = *hmax = *vmin = *vmax = 0;
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if (edid_check_info(edid))
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return -1;
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for (i = 0; i < ARRAY_SIZE(edid->monitor_details.descriptor); i++) {
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monitor = &edid->monitor_details.descriptor[i];
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if (monitor->type == EDID_MONITOR_DESCRIPTOR_RANGE) {
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*hmin = monitor->data.range_data.horizontal_min;
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*hmax = monitor->data.range_data.horizontal_max;
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*vmin = monitor->data.range_data.vertical_min;
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*vmax = monitor->data.range_data.vertical_max;
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return 0;
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}
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}
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return -1;
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}
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/**
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* Snip the tailing whitespace/return of a string.
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*
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* @param string The string to be snipped
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* @return the snipped string
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*/
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static char *snip(char *string)
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{
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char *s;
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/*
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* This is always a 13 character buffer
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* and it's not always terminated.
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*/
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string[12] = '\0';
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s = &string[strlen(string) - 1];
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while (s >= string && (isspace(*s) || *s == '\n' || *s == '\r' ||
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*s == '\0'))
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*(s--) = '\0';
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return string;
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}
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/**
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* Print an EDID monitor descriptor block
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*
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* @param monitor The EDID monitor descriptor block
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* @have_timing Modifies to 1 if the desciptor contains timing info
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*/
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static void edid_print_dtd(struct edid_monitor_descriptor *monitor,
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unsigned int *have_timing)
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{
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unsigned char *bytes = (unsigned char *)monitor;
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struct edid_detailed_timing *timing =
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(struct edid_detailed_timing *)monitor;
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if (bytes[0] == 0 && bytes[1] == 0) {
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if (monitor->type == EDID_MONITOR_DESCRIPTOR_SERIAL)
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printf("Monitor serial number: %s\n",
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snip(monitor->data.string));
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else if (monitor->type == EDID_MONITOR_DESCRIPTOR_ASCII)
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printf("Monitor ID: %s\n",
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snip(monitor->data.string));
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else if (monitor->type == EDID_MONITOR_DESCRIPTOR_NAME)
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printf("Monitor name: %s\n",
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snip(monitor->data.string));
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else if (monitor->type == EDID_MONITOR_DESCRIPTOR_RANGE)
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printf("Monitor range limits, horizontal sync: "
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"%d-%d kHz, vertical refresh: "
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"%d-%d Hz, max pixel clock: "
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"%d MHz\n",
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monitor->data.range_data.horizontal_min,
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monitor->data.range_data.horizontal_max,
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monitor->data.range_data.vertical_min,
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monitor->data.range_data.vertical_max,
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monitor->data.range_data.pixel_clock_max * 10);
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} else {
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uint32_t pixclock, h_active, h_blanking, v_active, v_blanking;
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uint32_t h_total, v_total, vfreq;
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pixclock = EDID_DETAILED_TIMING_PIXEL_CLOCK(*timing);
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h_active = EDID_DETAILED_TIMING_HORIZONTAL_ACTIVE(*timing);
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h_blanking = EDID_DETAILED_TIMING_HORIZONTAL_BLANKING(*timing);
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v_active = EDID_DETAILED_TIMING_VERTICAL_ACTIVE(*timing);
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v_blanking = EDID_DETAILED_TIMING_VERTICAL_BLANKING(*timing);
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h_total = h_active + h_blanking;
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v_total = v_active + v_blanking;
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if (v_total * h_total)
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vfreq = pixclock / (v_total * h_total);
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else
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vfreq = 1; /* Error case */
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printf("\t%dx%d\%c\t%d Hz (detailed)\n", h_active,
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v_active, h_active > 1000 ? ' ' : '\t', vfreq);
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*have_timing = 1;
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}
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}
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/**
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* Get the manufacturer name from an EDID info.
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*
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* @param edid_info The EDID info to be printed
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* @param name Returns the string of the manufacturer name
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*/
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static void edid_get_manufacturer_name(struct edid1_info *edid, char *name)
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{
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name[0] = EDID1_INFO_MANUFACTURER_NAME_CHAR1(*edid) + 'A' - 1;
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name[1] = EDID1_INFO_MANUFACTURER_NAME_CHAR2(*edid) + 'A' - 1;
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name[2] = EDID1_INFO_MANUFACTURER_NAME_CHAR3(*edid) + 'A' - 1;
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name[3] = '\0';
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}
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void edid_print_info(struct edid1_info *edid_info)
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{
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int i;
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char manufacturer[4];
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unsigned int have_timing = 0;
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uint32_t serial_number;
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if (edid_check_info(edid_info)) {
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printf("Not a valid EDID\n");
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return;
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}
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printf("EDID version: %d.%d\n",
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edid_info->version, edid_info->revision);
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printf("Product ID code: %04x\n", EDID1_INFO_PRODUCT_CODE(*edid_info));
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edid_get_manufacturer_name(edid_info, manufacturer);
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printf("Manufacturer: %s\n", manufacturer);
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serial_number = EDID1_INFO_SERIAL_NUMBER(*edid_info);
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if (serial_number != 0xffffffff) {
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if (strcmp(manufacturer, "MAG") == 0)
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serial_number -= 0x7000000;
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if (strcmp(manufacturer, "OQI") == 0)
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serial_number -= 456150000;
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if (strcmp(manufacturer, "VSC") == 0)
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serial_number -= 640000000;
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}
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printf("Serial number: %08x\n", serial_number);
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printf("Manufactured in week: %d year: %d\n",
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edid_info->week, edid_info->year + 1990);
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printf("Video input definition: %svoltage level %d%s%s%s%s%s\n",
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EDID1_INFO_VIDEO_INPUT_DIGITAL(*edid_info) ?
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"digital signal, " : "analog signal, ",
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EDID1_INFO_VIDEO_INPUT_VOLTAGE_LEVEL(*edid_info),
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EDID1_INFO_VIDEO_INPUT_BLANK_TO_BLACK(*edid_info) ?
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", blank to black" : "",
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EDID1_INFO_VIDEO_INPUT_SEPARATE_SYNC(*edid_info) ?
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", separate sync" : "",
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EDID1_INFO_VIDEO_INPUT_COMPOSITE_SYNC(*edid_info) ?
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", composite sync" : "",
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EDID1_INFO_VIDEO_INPUT_SYNC_ON_GREEN(*edid_info) ?
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", sync on green" : "",
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EDID1_INFO_VIDEO_INPUT_SERRATION_V(*edid_info) ?
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", serration v" : "");
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printf("Monitor is %s\n",
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EDID1_INFO_FEATURE_RGB(*edid_info) ? "RGB" : "non-RGB");
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printf("Maximum visible display size: %d cm x %d cm\n",
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edid_info->max_size_horizontal,
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edid_info->max_size_vertical);
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printf("Power management features: %s%s, %s%s, %s%s\n",
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EDID1_INFO_FEATURE_ACTIVE_OFF(*edid_info) ?
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"" : "no ", "active off",
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EDID1_INFO_FEATURE_SUSPEND(*edid_info) ? "" : "no ", "suspend",
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EDID1_INFO_FEATURE_STANDBY(*edid_info) ? "" : "no ", "standby");
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printf("Estabilished timings:\n");
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if (EDID1_INFO_ESTABLISHED_TIMING_720X400_70(*edid_info))
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printf("\t720x400\t\t70 Hz (VGA 640x400, IBM)\n");
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if (EDID1_INFO_ESTABLISHED_TIMING_720X400_88(*edid_info))
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printf("\t720x400\t\t88 Hz (XGA2)\n");
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if (EDID1_INFO_ESTABLISHED_TIMING_640X480_60(*edid_info))
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printf("\t640x480\t\t60 Hz (VGA)\n");
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if (EDID1_INFO_ESTABLISHED_TIMING_640X480_67(*edid_info))
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printf("\t640x480\t\t67 Hz (Mac II, Apple)\n");
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if (EDID1_INFO_ESTABLISHED_TIMING_640X480_72(*edid_info))
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printf("\t640x480\t\t72 Hz (VESA)\n");
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if (EDID1_INFO_ESTABLISHED_TIMING_640X480_75(*edid_info))
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printf("\t640x480\t\t75 Hz (VESA)\n");
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if (EDID1_INFO_ESTABLISHED_TIMING_800X600_56(*edid_info))
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printf("\t800x600\t\t56 Hz (VESA)\n");
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if (EDID1_INFO_ESTABLISHED_TIMING_800X600_60(*edid_info))
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printf("\t800x600\t\t60 Hz (VESA)\n");
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if (EDID1_INFO_ESTABLISHED_TIMING_800X600_72(*edid_info))
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printf("\t800x600\t\t72 Hz (VESA)\n");
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if (EDID1_INFO_ESTABLISHED_TIMING_800X600_75(*edid_info))
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printf("\t800x600\t\t75 Hz (VESA)\n");
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if (EDID1_INFO_ESTABLISHED_TIMING_832X624_75(*edid_info))
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printf("\t832x624\t\t75 Hz (Mac II)\n");
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if (EDID1_INFO_ESTABLISHED_TIMING_1024X768_87I(*edid_info))
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printf("\t1024x768\t87 Hz Interlaced (8514A)\n");
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if (EDID1_INFO_ESTABLISHED_TIMING_1024X768_60(*edid_info))
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printf("\t1024x768\t60 Hz (VESA)\n");
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if (EDID1_INFO_ESTABLISHED_TIMING_1024X768_70(*edid_info))
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printf("\t1024x768\t70 Hz (VESA)\n");
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if (EDID1_INFO_ESTABLISHED_TIMING_1024X768_75(*edid_info))
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printf("\t1024x768\t75 Hz (VESA)\n");
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if (EDID1_INFO_ESTABLISHED_TIMING_1280X1024_75(*edid_info))
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printf("\t1280x1024\t75 (VESA)\n");
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if (EDID1_INFO_ESTABLISHED_TIMING_1152X870_75(*edid_info))
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printf("\t1152x870\t75 (Mac II)\n");
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/* Standard timings. */
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printf("Standard timings:\n");
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for (i = 0; i < ARRAY_SIZE(edid_info->standard_timings); i++) {
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unsigned int aspect = 10000;
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unsigned int x, y;
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unsigned char xres, vfreq;
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xres = EDID1_INFO_STANDARD_TIMING_XRESOLUTION(*edid_info, i);
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vfreq = EDID1_INFO_STANDARD_TIMING_VFREQ(*edid_info, i);
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if ((xres != vfreq) ||
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((xres != 0) && (xres != 1)) ||
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((vfreq != 0) && (vfreq != 1))) {
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switch (EDID1_INFO_STANDARD_TIMING_ASPECT(*edid_info,
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i)) {
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case ASPECT_625:
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aspect = 6250;
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break;
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case ASPECT_75:
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aspect = 7500;
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break;
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case ASPECT_8:
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aspect = 8000;
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break;
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case ASPECT_5625:
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aspect = 5625;
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break;
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}
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x = (xres + 31) * 8;
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y = x * aspect / 10000;
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printf("\t%dx%d%c\t%d Hz\n", x, y,
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x > 1000 ? ' ' : '\t', (vfreq & 0x3f) + 60);
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have_timing = 1;
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}
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}
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/* Detailed timing information. */
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for (i = 0; i < ARRAY_SIZE(edid_info->monitor_details.descriptor);
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i++) {
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edid_print_dtd(&edid_info->monitor_details.descriptor[i],
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&have_timing);
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}
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if (!have_timing)
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printf("\tNone\n");
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}
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@ -0,0 +1,275 @@
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/*
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* Copyright (c) 2012 The Chromium OS Authors.
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*
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* (C) Copyright 2010
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* Petr Stetiar <ynezz@true.cz>
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*
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* See file CREDITS for list of people who contributed to this
|
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* project.
|
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*
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* This program is free software; you can redistribute it and/or
|
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* modify it under the terms of the GNU General Public License as
|
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* published by the Free Software Foundation; either version 2 of
|
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* the License, or (at your option) any later version.
|
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*
|
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* 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.
|
||||
*
|
||||
* You should have received a copy of the GNU General Public License
|
||||
* along with this program; if not, write to the Free Software
|
||||
* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
|
||||
* MA 02111-1307 USA
|
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*
|
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* Contains stolen code from ddcprobe project which is:
|
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* Copyright (C) Nalin Dahyabhai <bigfun@pobox.com>
|
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*
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*/
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#ifndef __EDID_H_
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#define __EDID_H_
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#include <linux/types.h>
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#define GET_BIT(_x, _pos) \
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(((_x) >> (_pos)) & 1)
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#define GET_BITS(_x, _pos_msb, _pos_lsb) \
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(((_x) >> (_pos_lsb)) & ((1 << ((_pos_msb) - (_pos_lsb) + 1)) - 1))
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/* Aspect ratios used in EDID info. */
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enum edid_aspect {
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ASPECT_625 = 0,
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ASPECT_75,
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ASPECT_8,
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ASPECT_5625,
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};
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/* Detailed timing information used in EDID v1.x */
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struct edid_detailed_timing {
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unsigned char pixel_clock[2];
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#define EDID_DETAILED_TIMING_PIXEL_CLOCK(_x) \
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(((((uint32_t)(_x).pixel_clock[1]) << 8) + \
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(_x).pixel_clock[0]) * 10000)
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unsigned char horizontal_active;
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unsigned char horizontal_blanking;
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unsigned char horizontal_active_blanking_hi;
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#define EDID_DETAILED_TIMING_HORIZONTAL_ACTIVE(_x) \
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((GET_BITS((_x).horizontal_active_blanking_hi, 7, 4) << 8) + \
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(_x).horizontal_active)
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#define EDID_DETAILED_TIMING_HORIZONTAL_BLANKING(_x) \
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((GET_BITS((_x).horizontal_active_blanking_hi, 3, 0) << 8) + \
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(_x).horizontal_blanking)
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unsigned char vertical_active;
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unsigned char vertical_blanking;
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unsigned char vertical_active_blanking_hi;
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#define EDID_DETAILED_TIMING_VERTICAL_ACTIVE(_x) \
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((GET_BITS((_x).vertical_active_blanking_hi, 7, 4) << 8) + \
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(_x).vertical_active)
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#define EDID_DETAILED_TIMING_VERTICAL_BLANKING(_x) \
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((GET_BITS((_x).vertical_active_blanking_hi, 3, 0) << 8) + \
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(_x).vertical_blanking)
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unsigned char hsync_offset;
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unsigned char hsync_pulse_width;
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unsigned char sync_offset_pulse_width;
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unsigned char hsync_vsync_offset_pulse_width_hi;
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#define EDID_DETAILED_TIMING_HSYNC_OFFSET(_x) \
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((GET_BITS((_x).hsync_vsync_offset_pulse_width_hi, 7, 6) << 8) + \
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(_x).hsync_offset)
|
||||
#define EDID_DETAILED_TIMING_HSYNC_PULSE_WIDTH(_x) \
|
||||
((GET_BITS((_x).hsync_vsync_offset_pulse_width_hi, 5, 4) << 8) + \
|
||||
(_x).hsync_pulse_width)
|
||||
#define EDID_DETAILED_TIMING_VSYNC_OFFSET(_x) \
|
||||
((GET_BITS((_x).hsync_vsync_offset_pulse_width_hi, 3, 2) << 4) + \
|
||||
GET_BITS((_x).vsync_offset_pulse_width, 7, 4))
|
||||
#define EDID_DETAILED_TIMING_VSYNC_PULSE_WIDTH(_x) \
|
||||
((GET_BITS((_x).hsync_vsync_offset_pulse_width_hi, 1, 0) << 4) + \
|
||||
GET_BITS((_x).vsync_offset_pulse_width, 3, 0))
|
||||
unsigned char himage_size;
|
||||
unsigned char vimage_size;
|
||||
unsigned char himage_vimage_size_hi;
|
||||
#define EDID_DETAILED_TIMING_HIMAGE_SIZE(_x) \
|
||||
((GET_BITS((_x).himage_vimage_size_hi, 7, 4) << 8) + (_x).himage_size)
|
||||
#define EDID_DETAILED_TIMING_VIMAGE_SIZE(_x) \
|
||||
((GET_BITS((_x).himage_vimage_size_hi, 3, 0) << 8) + (_x).vimage_size)
|
||||
unsigned char hborder;
|
||||
unsigned char vborder;
|
||||
unsigned char flags;
|
||||
#define EDID_DETAILED_TIMING_FLAG_INTERLACED(_x) \
|
||||
GET_BIT((_x).flags, 7)
|
||||
#define EDID_DETAILED_TIMING_FLAG_STEREO(_x) \
|
||||
GET_BITS((_x).flags, 6, 5)
|
||||
#define EDID_DETAILED_TIMING_FLAG_DIGITAL_COMPOSITE(_x) \
|
||||
GET_BITS((_x).flags, 4, 3)
|
||||
#define EDID_DETAILED_TIMING_FLAG_POLARITY(_x) \
|
||||
GET_BITS((_x).flags, 2, 1)
|
||||
#define EDID_DETAILED_TIMING_FLAG_INTERLEAVED(_x) \
|
||||
GET_BIT((_x).flags, 0)
|
||||
} __attribute__ ((__packed__));
|
||||
|
||||
enum edid_monitor_descriptor_types {
|
||||
EDID_MONITOR_DESCRIPTOR_SERIAL = 0xff,
|
||||
EDID_MONITOR_DESCRIPTOR_ASCII = 0xfe,
|
||||
EDID_MONITOR_DESCRIPTOR_RANGE = 0xfd,
|
||||
EDID_MONITOR_DESCRIPTOR_NAME = 0xfc,
|
||||
};
|
||||
|
||||
struct edid_monitor_descriptor {
|
||||
uint16_t zero_flag_1;
|
||||
unsigned char zero_flag_2;
|
||||
unsigned char type;
|
||||
unsigned char zero_flag_3;
|
||||
union {
|
||||
char string[13];
|
||||
struct {
|
||||
unsigned char vertical_min;
|
||||
unsigned char vertical_max;
|
||||
unsigned char horizontal_min;
|
||||
unsigned char horizontal_max;
|
||||
unsigned char pixel_clock_max;
|
||||
unsigned char gtf_data[8];
|
||||
} range_data;
|
||||
} data;
|
||||
} __attribute__ ((__packed__));
|
||||
|
||||
struct edid1_info {
|
||||
unsigned char header[8];
|
||||
unsigned char manufacturer_name[2];
|
||||
#define EDID1_INFO_MANUFACTURER_NAME_ZERO(_x) \
|
||||
GET_BIT(((_x).manufacturer_name[0]), 7)
|
||||
#define EDID1_INFO_MANUFACTURER_NAME_CHAR1(_x) \
|
||||
GET_BITS(((_x).manufacturer_name[0]), 6, 2)
|
||||
#define EDID1_INFO_MANUFACTURER_NAME_CHAR2(_x) \
|
||||
((GET_BITS(((_x).manufacturer_name[0]), 1, 0) << 3) + \
|
||||
GET_BITS(((_x).manufacturer_name[1]), 7, 5))
|
||||
#define EDID1_INFO_MANUFACTURER_NAME_CHAR3(_x) \
|
||||
GET_BITS(((_x).manufacturer_name[1]), 4, 0)
|
||||
unsigned char product_code[2];
|
||||
#define EDID1_INFO_PRODUCT_CODE(_x) \
|
||||
(((uint16_t)(_x).product_code[1] << 8) + (_x).product_code[0])
|
||||
unsigned char serial_number[4];
|
||||
#define EDID1_INFO_SERIAL_NUMBER(_x) \
|
||||
(((uint32_t)(_x).serial_number[3] << 24) + \
|
||||
((_x).serial_number[2] << 16) + ((_x).serial_number[1] << 8) + \
|
||||
(_x).serial_number[0])
|
||||
unsigned char week;
|
||||
unsigned char year;
|
||||
unsigned char version;
|
||||
unsigned char revision;
|
||||
unsigned char video_input_definition;
|
||||
#define EDID1_INFO_VIDEO_INPUT_DIGITAL(_x) \
|
||||
GET_BIT(((_x).video_input_definition), 7)
|
||||
#define EDID1_INFO_VIDEO_INPUT_VOLTAGE_LEVEL(_x) \
|
||||
GET_BITS(((_x).video_input_definition), 6, 5)
|
||||
#define EDID1_INFO_VIDEO_INPUT_BLANK_TO_BLACK(_x) \
|
||||
GET_BIT(((_x).video_input_definition), 4)
|
||||
#define EDID1_INFO_VIDEO_INPUT_SEPARATE_SYNC(_x) \
|
||||
GET_BIT(((_x).video_input_definition), 3)
|
||||
#define EDID1_INFO_VIDEO_INPUT_COMPOSITE_SYNC(_x) \
|
||||
GET_BIT(((_x).video_input_definition), 2)
|
||||
#define EDID1_INFO_VIDEO_INPUT_SYNC_ON_GREEN(_x) \
|
||||
GET_BIT(((_x).video_input_definition), 1)
|
||||
#define EDID1_INFO_VIDEO_INPUT_SERRATION_V(_x) \
|
||||
GET_BIT(((_x).video_input_definition), 0)
|
||||
unsigned char max_size_horizontal;
|
||||
unsigned char max_size_vertical;
|
||||
unsigned char gamma;
|
||||
unsigned char feature_support;
|
||||
#define EDID1_INFO_FEATURE_STANDBY(_x) \
|
||||
GET_BIT(((_x).feature_support), 7)
|
||||
#define EDID1_INFO_FEATURE_SUSPEND(_x) \
|
||||
GET_BIT(((_x).feature_support), 6)
|
||||
#define EDID1_INFO_FEATURE_ACTIVE_OFF(_x) \
|
||||
GET_BIT(((_x).feature_support), 5)
|
||||
#define EDID1_INFO_FEATURE_DISPLAY_TYPE(_x) \
|
||||
GET_BITS(((_x).feature_support), 4, 3)
|
||||
#define EDID1_INFO_FEATURE_RGB(_x) \
|
||||
GET_BIT(((_x).feature_support), 2)
|
||||
#define EDID1_INFO_FEATURE_PREFERRED_TIMING_MODE(_x) \
|
||||
GET_BIT(((_x).feature_support), 1)
|
||||
#define EDID1_INFO_FEATURE_DEFAULT_GTF_SUPPORT(_x) \
|
||||
GET_BIT(((_x).feature_support), 0)
|
||||
unsigned char color_characteristics[10];
|
||||
unsigned char established_timings[3];
|
||||
#define EDID1_INFO_ESTABLISHED_TIMING_720X400_70(_x) \
|
||||
GET_BIT(((_x).established_timings[0]), 7)
|
||||
#define EDID1_INFO_ESTABLISHED_TIMING_720X400_88(_x) \
|
||||
GET_BIT(((_x).established_timings[0]), 6)
|
||||
#define EDID1_INFO_ESTABLISHED_TIMING_640X480_60(_x) \
|
||||
GET_BIT(((_x).established_timings[0]), 5)
|
||||
#define EDID1_INFO_ESTABLISHED_TIMING_640X480_67(_x) \
|
||||
GET_BIT(((_x).established_timings[0]), 4)
|
||||
#define EDID1_INFO_ESTABLISHED_TIMING_640X480_72(_x) \
|
||||
GET_BIT(((_x).established_timings[0]), 3)
|
||||
#define EDID1_INFO_ESTABLISHED_TIMING_640X480_75(_x) \
|
||||
GET_BIT(((_x).established_timings[0]), 2)
|
||||
#define EDID1_INFO_ESTABLISHED_TIMING_800X600_56(_x) \
|
||||
GET_BIT(((_x).established_timings[0]), 1)
|
||||
#define EDID1_INFO_ESTABLISHED_TIMING_800X600_60(_x) \
|
||||
GET_BIT(((_x).established_timings[0]), 0)
|
||||
#define EDID1_INFO_ESTABLISHED_TIMING_800X600_72(_x) \
|
||||
GET_BIT(((_x).established_timings[1]), 7)
|
||||
#define EDID1_INFO_ESTABLISHED_TIMING_800X600_75(_x) \
|
||||
GET_BIT(((_x).established_timings[1]), 6)
|
||||
#define EDID1_INFO_ESTABLISHED_TIMING_832X624_75(_x) \
|
||||
GET_BIT(((_x).established_timings[1]), 5)
|
||||
#define EDID1_INFO_ESTABLISHED_TIMING_1024X768_87I(_x) \
|
||||
GET_BIT(((_x).established_timings[1]), 4)
|
||||
#define EDID1_INFO_ESTABLISHED_TIMING_1024X768_60(_x) \
|
||||
GET_BIT(((_x).established_timings[1]), 3)
|
||||
#define EDID1_INFO_ESTABLISHED_TIMING_1024X768_70(_x) \
|
||||
GET_BIT(((_x).established_timings[1]), 2)
|
||||
#define EDID1_INFO_ESTABLISHED_TIMING_1024X768_75(_x) \
|
||||
GET_BIT(((_x).established_timings[1]), 1)
|
||||
#define EDID1_INFO_ESTABLISHED_TIMING_1280X1024_75(_x) \
|
||||
GET_BIT(((_x).established_timings[1]), 0)
|
||||
#define EDID1_INFO_ESTABLISHED_TIMING_1152X870_75(_x) \
|
||||
GET_BIT(((_x).established_timings[2]), 7)
|
||||
struct {
|
||||
unsigned char xresolution;
|
||||
unsigned char aspect_vfreq;
|
||||
} __attribute__((__packed__)) standard_timings[8];
|
||||
#define EDID1_INFO_STANDARD_TIMING_XRESOLUTION(_x, _i) \
|
||||
(((_x).standard_timings[_i]).xresolution)
|
||||
#define EDID1_INFO_STANDARD_TIMING_ASPECT(_x, _i) \
|
||||
GET_BITS(((_x).standard_timings[_i].aspect_vfreq), 7, 6)
|
||||
#define EDID1_INFO_STANDARD_TIMING_VFREQ(_x, _i) \
|
||||
GET_BITS(((_x).standard_timings[_i].aspect_vfreq), 5, 0)
|
||||
union {
|
||||
unsigned char timing[72];
|
||||
struct edid_monitor_descriptor descriptor[4];
|
||||
} monitor_details;
|
||||
unsigned char extension_flag;
|
||||
unsigned char checksum;
|
||||
} __attribute__ ((__packed__));
|
||||
|
||||
/**
|
||||
* Print the EDID info.
|
||||
*
|
||||
* @param edid_info The EDID info to be printed
|
||||
*/
|
||||
void edid_print_info(struct edid1_info *edid_info);
|
||||
|
||||
/**
|
||||
* Check the EDID info.
|
||||
*
|
||||
* @param info The EDID info to be checked
|
||||
* @return 0 on valid, or -1 on invalid
|
||||
*/
|
||||
int edid_check_info(struct edid1_info *info);
|
||||
|
||||
/**
|
||||
* Get the horizontal and vertical rate ranges of the monitor.
|
||||
*
|
||||
* @param edid The EDID info
|
||||
* @param hmin Returns the minimum horizontal rate
|
||||
* @param hmax Returns the maxium horizontal rate
|
||||
* @param vmin Returns the minimum vertical rate
|
||||
* @param vmax Returns the maxium vertical rate
|
||||
* @return 0 on success, or -1 on error
|
||||
*/
|
||||
int edid_get_ranges(struct edid1_info *edid, unsigned int *hmin,
|
||||
unsigned int *hmax, unsigned int *vmin,
|
||||
unsigned int *vmax);
|
||||
|
||||
#endif /* __EDID_H_ */
|
||||
Loading…
Reference in New Issue