72af975f9c
Base EDID only lets you specify the maximum dotclock in tens of MHz, which is too fuzzy for some monitors. 1600x1200@60 is just over 160MHz, but if the monitor really can't handle any mode at 170MHz, then 160 is more correct. Fix up the EDID block before the driver can see it in this case, so we don't spuriously reject modes.
320 lines
7.9 KiB
C
320 lines
7.9 KiB
C
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/* interpret_edid.c: interpret a primary EDID block
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*
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* Copyright 1998 by Egbert Eich <Egbert.Eich@Physik.TU-Darmstadt.DE>
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*/
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#ifdef HAVE_XORG_CONFIG_H
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#include <xorg-config.h>
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#endif
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#include "misc.h"
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#include "xf86.h"
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#include "xf86_OSproc.h"
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#define _PARSE_EDID_
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#include "xf86DDC.h"
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#include <string.h>
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static void get_vendor_section(Uchar*, struct vendor *);
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static void get_version_section(Uchar*, struct edid_version *);
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static void get_display_section(Uchar*, struct disp_features *,
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struct edid_version *);
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static void get_established_timing_section(Uchar*, struct established_timings *);
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static void get_std_timing_section(Uchar*, struct std_timings *,
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struct edid_version *);
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static void get_dt_md_section(Uchar *, struct edid_version *,
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struct detailed_monitor_section *det_mon);
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static void copy_string(Uchar *, Uchar *);
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static void get_dst_timing_section(Uchar *, struct std_timings *,
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struct edid_version *);
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static void get_monitor_ranges(Uchar *, struct monitor_ranges *);
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static void get_whitepoint_section(Uchar *, struct whitePoints *);
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static void get_detailed_timing_section(Uchar*, struct detailed_timings *);
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static Bool validate_version(int scrnIndex, struct edid_version *);
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static void
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handle_edid_quirks(xf86MonPtr m)
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{
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int i, j;
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struct detailed_timings *preferred_timing;
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struct monitor_ranges *ranges;
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/*
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* max_clock is only encoded in EDID in tens of MHz, so occasionally we
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* find a monitor claiming a max of 160 with a mode requiring 162, or
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* similar. Strictly we should refuse to round up too far, but let's
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* see how well this works.
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*/
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for (i = 0; i < 4; i++) {
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if (m->det_mon[i].type == DS_RANGES) {
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ranges = &m->det_mon[i].section.ranges;
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for (j = 0; j < 4; j++) {
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if (m->det_mon[j].type == DT) {
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preferred_timing = &m->det_mon[j].section.d_timings;
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if (!ranges->max_clock) continue; /* zero is legal */
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if (ranges->max_clock * 1000000 < preferred_timing->clock) {
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xf86Msg(X_WARNING,
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"EDID preferred timing clock %.2fMHz exceeds "
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"claimed max %dMHz, fixing\n",
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preferred_timing->clock / 1.0e6,
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ranges->max_clock);
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ranges->max_clock =
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(preferred_timing->clock+999999)/1000000;
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return;
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}
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}
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}
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}
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}
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}
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xf86MonPtr
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xf86InterpretEDID(int scrnIndex, Uchar *block)
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{
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xf86MonPtr m;
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if (!block) return NULL;
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if (! (m = xnfcalloc(sizeof(xf86Monitor),1))) return NULL;
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m->scrnIndex = scrnIndex;
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m->rawData = block;
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get_vendor_section(SECTION(VENDOR_SECTION,block),&m->vendor);
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get_version_section(SECTION(VERSION_SECTION,block),&m->ver);
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if (!validate_version(scrnIndex, &m->ver)) goto error;
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get_display_section(SECTION(DISPLAY_SECTION,block),&m->features,
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&m->ver);
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get_established_timing_section(SECTION(ESTABLISHED_TIMING_SECTION,block),
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&m->timings1);
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get_std_timing_section(SECTION(STD_TIMING_SECTION,block),m->timings2,
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&m->ver);
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get_dt_md_section(SECTION(DET_TIMING_SECTION,block),&m->ver, m->det_mon);
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m->no_sections = (int)*(char *)SECTION(NO_EDID,block);
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handle_edid_quirks(m);
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return (m);
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error:
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xfree(m);
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return NULL;
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}
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static void
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get_vendor_section(Uchar *c, struct vendor *r)
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{
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r->name[0] = L1;
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r->name[1] = L2;
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r->name[2] = L3;
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r->name[3] = '\0';
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r->prod_id = PROD_ID;
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r->serial = SERIAL_NO;
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r->week = WEEK;
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r->year = YEAR;
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}
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static void
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get_version_section(Uchar *c, struct edid_version *r)
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{
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r->version = VERSION;
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r->revision = REVISION;
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}
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static void
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get_display_section(Uchar *c, struct disp_features *r,
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struct edid_version *v)
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{
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r->input_type = INPUT_TYPE;
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if (!DIGITAL(r->input_type)) {
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r->input_voltage = INPUT_VOLTAGE;
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r->input_setup = SETUP;
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r->input_sync = SYNC;
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} else if (v->version > 1 || v->revision > 2)
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r->input_dfp = DFP;
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r->hsize = HSIZE_MAX;
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r->vsize = VSIZE_MAX;
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r->gamma = GAMMA;
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r->dpms = DPMS;
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r->display_type = DISPLAY_TYPE;
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r->msc = MSC;
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r->redx = REDX;
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r->redy = REDY;
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r->greenx = GREENX;
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r->greeny = GREENY;
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r->bluex = BLUEX;
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r->bluey = BLUEY;
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r->whitex = WHITEX;
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r->whitey = WHITEY;
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}
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static void
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get_established_timing_section(Uchar *c, struct established_timings *r)
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{
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r->t1 = T1;
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r->t2 = T2;
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r->t_manu = T_MANU;
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}
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static void
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get_std_timing_section(Uchar *c, struct std_timings *r,
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struct edid_version *v)
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{
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int i;
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for (i=0;i<STD_TIMINGS;i++){
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if (VALID_TIMING) {
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r[i].hsize = HSIZE1;
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VSIZE1(r[i].vsize);
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r[i].refresh = REFRESH_R;
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r[i].id = STD_TIMING_ID;
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} else {
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r[i].hsize = r[i].vsize = r[i].refresh = r[i].id = 0;
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}
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NEXT_STD_TIMING;
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}
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}
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static void
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get_dt_md_section(Uchar *c, struct edid_version *ver,
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struct detailed_monitor_section *det_mon)
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{
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int i;
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for (i=0;i<DET_TIMINGS;i++) {
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if (ver->version == 1 && ver->revision >= 1 && IS_MONITOR_DESC) {
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switch (MONITOR_DESC_TYPE) {
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case SERIAL_NUMBER:
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det_mon[i].type = DS_SERIAL;
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copy_string(c,det_mon[i].section.serial);
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break;
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case ASCII_STR:
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det_mon[i].type = DS_ASCII_STR;
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copy_string(c,det_mon[i].section.ascii_data);
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break;
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case MONITOR_RANGES:
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det_mon[i].type = DS_RANGES;
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get_monitor_ranges(c,&det_mon[i].section.ranges);
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break;
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case MONITOR_NAME:
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det_mon[i].type = DS_NAME;
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copy_string(c,det_mon[i].section.name);
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break;
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case ADD_COLOR_POINT:
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det_mon[i].type = DS_WHITE_P;
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get_whitepoint_section(c,det_mon[i].section.wp);
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break;
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case ADD_STD_TIMINGS:
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det_mon[i].type = DS_STD_TIMINGS;
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get_dst_timing_section(c,det_mon[i].section.std_t, ver);
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break;
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case ADD_DUMMY:
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det_mon[i].type = DS_DUMMY;
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break;
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default:
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det_mon[i].type = DS_UNKOWN;
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break;
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}
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} else {
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det_mon[i].type = DT;
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get_detailed_timing_section(c,&det_mon[i].section.d_timings);
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}
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NEXT_DT_MD_SECTION;
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}
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}
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static void
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copy_string(Uchar *c, Uchar *s)
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{
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int i;
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c = c + 5;
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for (i = 0; (i < 13 && *c != 0x0A); i++)
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*(s++) = *(c++);
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*s = 0;
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while (i-- && (*--s == 0x20)) *s = 0;
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}
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static void
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get_dst_timing_section(Uchar *c, struct std_timings *t,
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struct edid_version *v)
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{
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int j;
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c = c + 5;
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for (j = 0; j < 5; j++) {
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t[j].hsize = HSIZE1;
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VSIZE1(t[j].vsize);
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t[j].refresh = REFRESH_R;
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t[j].id = STD_TIMING_ID;
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NEXT_STD_TIMING;
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}
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}
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static void
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get_monitor_ranges(Uchar *c, struct monitor_ranges *r)
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{
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r->min_v = MIN_V;
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r->max_v = MAX_V;
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r->min_h = MIN_H;
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r->max_h = MAX_H;
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r->max_clock = 0;
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if(MAX_CLOCK != 0xff) /* is specified? */
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r->max_clock = MAX_CLOCK * 10;
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if (HAVE_2ND_GTF) {
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r->gtf_2nd_f = F_2ND_GTF;
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r->gtf_2nd_c = C_2ND_GTF;
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r->gtf_2nd_m = M_2ND_GTF;
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r->gtf_2nd_k = K_2ND_GTF;
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r->gtf_2nd_j = J_2ND_GTF;
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} else
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r->gtf_2nd_f = 0;
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}
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static void
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get_whitepoint_section(Uchar *c, struct whitePoints *wp)
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{
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wp[1].white_x = WHITEX1;
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wp[1].white_y = WHITEY1;
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wp[2].white_x = WHITEX2;
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wp[2].white_y = WHITEY2;
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wp[1].index = WHITE_INDEX1;
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wp[2].index = WHITE_INDEX2;
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wp[1].white_gamma = WHITE_GAMMA1;
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wp[2].white_gamma = WHITE_GAMMA2;
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}
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static void
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get_detailed_timing_section(Uchar *c, struct detailed_timings *r)
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{
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r->clock = PIXEL_CLOCK;
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r->h_active = H_ACTIVE;
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r->h_blanking = H_BLANK;
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r->v_active = V_ACTIVE;
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r->v_blanking = V_BLANK;
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r->h_sync_off = H_SYNC_OFF;
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r->h_sync_width = H_SYNC_WIDTH;
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r->v_sync_off = V_SYNC_OFF;
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r->v_sync_width = V_SYNC_WIDTH;
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r->h_size = H_SIZE;
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r->v_size = V_SIZE;
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r->h_border = H_BORDER;
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r->v_border = V_BORDER;
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r->interlaced = INTERLACED;
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r->stereo = STEREO;
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r->stereo_1 = STEREO1;
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r->sync = SYNC_T;
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r->misc = MISC;
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}
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static Bool
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validate_version(int scrnIndex, struct edid_version *r)
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{
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if (r->version != 1)
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return FALSE;
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if (r->revision > 3) {
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xf86DrvMsg(scrnIndex, X_ERROR,"EDID Version 1.%i not yet supported\n",
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r->revision);
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return FALSE;
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}
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return TRUE;
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}
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