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Diffstat (limited to 'hw/xfree86/ddc/interpret_edid.c')
-rw-r--r--hw/xfree86/ddc/interpret_edid.c685
1 files changed, 685 insertions, 0 deletions
diff --git a/hw/xfree86/ddc/interpret_edid.c b/hw/xfree86/ddc/interpret_edid.c
new file mode 100644
index 0000000..46958f7
--- /dev/null
+++ b/hw/xfree86/ddc/interpret_edid.c
@@ -0,0 +1,685 @@
+/*
+ * Copyright 1998 by Egbert Eich <Egbert.Eich@Physik.TU-Darmstadt.DE>
+ * Copyright 2007 Red Hat, Inc.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+ * DEALINGS IN THE SOFTWARE.
+ *
+ * interpret_edid.c: interpret a primary EDID block
+ */
+
+#ifdef HAVE_XORG_CONFIG_H
+#include <xorg-config.h>
+#endif
+
+#include "misc.h"
+#include "xf86.h"
+#include "xf86_OSproc.h"
+#define _PARSE_EDID_
+#include "xf86DDC.h"
+#include <string.h>
+
+static void get_vendor_section(Uchar*, struct vendor *);
+static void get_version_section(Uchar*, struct edid_version *);
+static void get_display_section(Uchar*, struct disp_features *,
+ struct edid_version *);
+static void get_established_timing_section(Uchar*, struct established_timings *);
+static void get_std_timing_section(Uchar*, struct std_timings *,
+ struct edid_version *);
+static void fetch_detailed_block(Uchar *c, struct edid_version *ver,
+ struct detailed_monitor_section *det_mon);
+static void get_dt_md_section(Uchar *, struct edid_version *,
+ struct detailed_monitor_section *det_mon);
+static void copy_string(Uchar *, Uchar *);
+static void get_dst_timing_section(Uchar *, struct std_timings *,
+ struct edid_version *);
+static void get_monitor_ranges(Uchar *, struct monitor_ranges *);
+static void get_whitepoint_section(Uchar *, struct whitePoints *);
+static void get_detailed_timing_section(Uchar*, struct detailed_timings *);
+static Bool validate_version(int scrnIndex, struct edid_version *);
+
+static void
+find_ranges_section(struct detailed_monitor_section *det, void *ranges)
+{
+ if (det->type == DS_RANGES && det->section.ranges.max_clock)
+ *(struct monitor_ranges **)ranges = &det->section.ranges;
+}
+
+static void
+find_max_detailed_clock(struct detailed_monitor_section *det, void *ret)
+{
+ if (det->type == DT) {
+ *(int *)ret = max(*((int *)ret),
+ det->section.d_timings.clock);
+ }
+}
+
+static void
+handle_edid_quirks(xf86MonPtr m)
+{
+ struct monitor_ranges *ranges = NULL;
+
+ /*
+ * max_clock is only encoded in EDID in tens of MHz, so occasionally we
+ * find a monitor claiming a max of 160 with a mode requiring 162, or
+ * similar. Strictly we should refuse to round up too far, but let's
+ * see how well this works.
+ */
+
+ /* Try to find Monitor Range and max clock, then re-set range value*/
+ xf86ForEachDetailedBlock(m, find_ranges_section, &ranges);
+ if (ranges && ranges->max_clock) {
+ int clock = 0;
+ xf86ForEachDetailedBlock(m, find_max_detailed_clock, &clock);
+ if (clock && (ranges->max_clock * 1e6 < clock)) {
+ xf86Msg(X_WARNING, "EDID timing clock %.2f exceeds claimed max "
+ "%dMHz, fixing\n", clock / 1.0e6, ranges->max_clock);
+ ranges->max_clock = (clock+999999)/1e6;
+ }
+ }
+}
+
+struct det_hv_parameter {
+ int real_hsize;
+ int real_vsize;
+ float target_aspect;
+};
+
+static void handle_detailed_hvsize(struct detailed_monitor_section *det_mon,
+ void *data)
+{
+ struct det_hv_parameter *p = (struct det_hv_parameter *)data;
+ float timing_aspect;
+
+ if (det_mon->type == DT) {
+ struct detailed_timings *timing;
+ timing = &det_mon->section.d_timings;
+
+ if (!timing->v_size)
+ return;
+
+ timing_aspect = (float)timing->h_size / timing->v_size;
+ if (fabs(1 - (timing_aspect / p->target_aspect)) < 0.05) {
+ p->real_hsize = max(p->real_hsize, timing->h_size);
+ p->real_vsize = max(p->real_vsize, timing->v_size);
+ }
+ }
+}
+
+static void encode_aspect_ratio(xf86MonPtr m)
+{
+ /*
+ * some monitors encode the aspect ratio instead of the physical size.
+ * try to find the largest detailed timing that matches that aspect
+ * ratio and use that to fill in the feature section.
+ */
+ if ((m->features.hsize == 16 && m->features.vsize == 9) ||
+ (m->features.hsize == 16 && m->features.vsize == 10) ||
+ (m->features.hsize == 4 && m->features.vsize == 3) ||
+ (m->features.hsize == 5 && m->features.vsize == 4)) {
+
+ struct det_hv_parameter p;
+ p.real_hsize = 0;
+ p.real_vsize = 0;
+ p.target_aspect = (float)m->features.hsize /m->features.vsize;
+
+ xf86ForEachDetailedBlock(m, handle_detailed_hvsize, &p);
+
+ if (!p.real_hsize || !p.real_vsize) {
+ m->features.hsize = m->features.vsize = 0;
+ } else if ((m->features.hsize * 10 == p.real_hsize) &&
+ (m->features.vsize * 10 == p.real_vsize)) {
+ /* exact match is just unlikely, should do a better check though */
+ m->features.hsize = m->features.vsize = 0;
+ } else {
+ /* convert mm to cm */
+ m->features.hsize = (p.real_hsize + 5) / 10;
+ m->features.vsize = (p.real_vsize + 5) / 10;
+ }
+
+ xf86Msg(X_INFO, "Quirked EDID physical size to %dx%d cm\n",
+ m->features.hsize, m->features.vsize);
+ }
+}
+
+xf86MonPtr
+xf86InterpretEDID(int scrnIndex, Uchar *block)
+{
+ xf86MonPtr m;
+
+ if (!block) return NULL;
+ if (! (m = xnfcalloc(sizeof(xf86Monitor),1))) return NULL;
+ m->scrnIndex = scrnIndex;
+ m->rawData = block;
+
+ get_vendor_section(SECTION(VENDOR_SECTION,block),&m->vendor);
+ get_version_section(SECTION(VERSION_SECTION,block),&m->ver);
+ if (!validate_version(scrnIndex, &m->ver)) goto error;
+ get_display_section(SECTION(DISPLAY_SECTION,block),&m->features,
+ &m->ver);
+ get_established_timing_section(SECTION(ESTABLISHED_TIMING_SECTION,block),
+ &m->timings1);
+ get_std_timing_section(SECTION(STD_TIMING_SECTION,block),m->timings2,
+ &m->ver);
+ get_dt_md_section(SECTION(DET_TIMING_SECTION,block),&m->ver, m->det_mon);
+ m->no_sections = (int)*(char *)SECTION(NO_EDID,block);
+
+ handle_edid_quirks(m);
+ encode_aspect_ratio(m);
+
+ return m;
+
+ error:
+ free(m);
+ return NULL;
+}
+
+static int get_cea_detail_timing(Uchar *blk, xf86MonPtr mon,
+ struct detailed_monitor_section *det_mon)
+{
+ int dt_num;
+ int dt_offset = ((struct cea_ext_body *)blk)->dt_offset;
+
+ dt_num = 0;
+
+ if (dt_offset < CEA_EXT_MIN_DATA_OFFSET)
+ return dt_num;
+
+ for (; dt_offset < (CEA_EXT_MAX_DATA_OFFSET - DET_TIMING_INFO_LEN) &&
+ dt_num < CEA_EXT_DET_TIMING_NUM;
+ _NEXT_DT_MD_SECTION(dt_offset)) {
+
+ fetch_detailed_block(blk + dt_offset, &mon->ver, det_mon + dt_num);
+ dt_num = dt_num + 1 ;
+ }
+
+ return dt_num;
+}
+
+static void handle_cea_detail_block(Uchar *ext, xf86MonPtr mon,
+ handle_detailed_fn fn,
+ void *data)
+{
+ int i;
+ struct detailed_monitor_section det_mon[CEA_EXT_DET_TIMING_NUM];
+ int det_mon_num;
+
+ det_mon_num = get_cea_detail_timing(ext, mon, det_mon);
+
+ for (i = 0; i < det_mon_num; i++)
+ fn(det_mon + i, data);
+}
+
+void xf86ForEachDetailedBlock(xf86MonPtr mon,
+ handle_detailed_fn fn,
+ void *data)
+{
+ int i;
+ Uchar *ext;
+
+ if (mon == NULL)
+ return;
+
+ for (i = 0; i < DET_TIMINGS; i++)
+ fn(mon->det_mon + i, data);
+
+ for (i = 0; i < mon->no_sections; i++) {
+ ext = mon->rawData + EDID1_LEN * (i + 1);
+ switch (ext[EXT_TAG]){
+ case CEA_EXT:
+ handle_cea_detail_block(ext, mon, fn, data);
+ break;
+ case VTB_EXT:
+ case DI_EXT:
+ case LS_EXT:
+ case MI_EXT:
+ break;
+ }
+ }
+}
+
+static struct cea_data_block *
+extract_cea_data_block(Uchar *ext, int data_type)
+{
+ struct cea_ext_body *cea;
+ struct cea_data_block *data_collection;
+ struct cea_data_block *data_end;
+
+ cea = (struct cea_ext_body *)ext;
+
+ if (cea->dt_offset <= CEA_EXT_MIN_DATA_OFFSET)
+ return NULL;
+
+ data_collection = &cea->data_collection;
+ data_end = (struct cea_data_block *)(cea->dt_offset + ext);
+
+ for ( ;data_collection < data_end;) {
+
+ if (data_type == data_collection->tag) {
+ return data_collection;
+ }
+ data_collection = (void *)((unsigned char *)data_collection +
+ data_collection->len + 1);
+ }
+
+ return NULL;
+}
+
+static void handle_cea_video_block(Uchar *ext, handle_video_fn fn, void *data)
+{
+ struct cea_video_block *video;
+ struct cea_video_block *video_end;
+ struct cea_data_block *data_collection;
+
+ data_collection = extract_cea_data_block(ext, CEA_VIDEO_BLK);
+ if (data_collection == NULL)
+ return;
+
+ video = &data_collection->u.video;
+ video_end = (struct cea_video_block *)
+ ((Uchar *)video + data_collection->len);
+
+ for (; video < video_end; video = video + 1) {
+ fn(video, data);
+ }
+}
+
+void xf86ForEachVideoBlock(xf86MonPtr mon,
+ handle_video_fn fn,
+ void *data)
+{
+ int i;
+ Uchar *ext;
+
+ if (mon == NULL)
+ return;
+
+ for (i = 0; i < mon->no_sections; i++) {
+ ext = mon->rawData + EDID1_LEN * (i + 1);
+ switch (ext[EXT_TAG]) {
+ case CEA_EXT:
+ handle_cea_video_block(ext, fn, data);
+ break;
+ case VTB_EXT:
+ case DI_EXT:
+ case LS_EXT:
+ case MI_EXT:
+ break;
+ }
+ }
+}
+
+xf86MonPtr
+xf86InterpretEEDID(int scrnIndex, Uchar *block)
+{
+ xf86MonPtr m;
+
+ m = xf86InterpretEDID(scrnIndex, block);
+ if (!m)
+ return NULL;
+
+ /* extension parse */
+
+ return m;
+}
+
+static void
+get_vendor_section(Uchar *c, struct vendor *r)
+{
+ r->name[0] = L1;
+ r->name[1] = L2;
+ r->name[2] = L3;
+ r->name[3] = '\0';
+
+ r->prod_id = PROD_ID;
+ r->serial = SERIAL_NO;
+ r->week = WEEK;
+ r->year = YEAR;
+}
+
+static void
+get_version_section(Uchar *c, struct edid_version *r)
+{
+ r->version = VERSION;
+ r->revision = REVISION;
+}
+
+static void
+get_display_section(Uchar *c, struct disp_features *r,
+ struct edid_version *v)
+{
+ r->input_type = INPUT_TYPE;
+ if (!DIGITAL(r->input_type)) {
+ r->input_voltage = INPUT_VOLTAGE;
+ r->input_setup = SETUP;
+ r->input_sync = SYNC;
+ } else if (v->revision == 2 || v->revision == 3) {
+ r->input_dfp = DFP;
+ } else if (v->revision >= 4) {
+ r->input_bpc = BPC;
+ r->input_interface = DIGITAL_INTERFACE;
+ }
+ r->hsize = HSIZE_MAX;
+ r->vsize = VSIZE_MAX;
+ r->gamma = GAMMA;
+ r->dpms = DPMS;
+ r->display_type = DISPLAY_TYPE;
+ r->msc = MSC;
+ r->redx = REDX;
+ r->redy = REDY;
+ r->greenx = GREENX;
+ r->greeny = GREENY;
+ r->bluex = BLUEX;
+ r->bluey = BLUEY;
+ r->whitex = WHITEX;
+ r->whitey = WHITEY;
+}
+
+static void
+get_established_timing_section(Uchar *c, struct established_timings *r)
+{
+ r->t1 = T1;
+ r->t2 = T2;
+ r->t_manu = T_MANU;
+}
+
+static void
+get_cvt_timing_section(Uchar *c, struct cvt_timings *r)
+{
+ int i;
+
+ for (i = 0; i < 4; i++) {
+ if (c[0] && c[1] && c[2]) {
+ r[i].height = (c[0] + ((c[1] & 0xF0) << 8) + 1) * 2;
+ switch (c[1] & 0xc0) {
+ case 0x00: r[i].width = r[i].height * 4 / 3; break;
+ case 0x40: r[i].width = r[i].height * 16 / 9; break;
+ case 0x80: r[i].width = r[i].height * 16 / 10; break;
+ case 0xc0: r[i].width = r[i].height * 15 / 9; break;
+ }
+ switch (c[2] & 0x60) {
+ case 0x00: r[i].rate = 50; break;
+ case 0x20: r[i].rate = 60; break;
+ case 0x40: r[i].rate = 75; break;
+ case 0x60: r[i].rate = 85; break;
+ }
+ r[i].rates = c[2] & 0x1f;
+ } else {
+ return;
+ }
+ c += 3;
+ }
+}
+
+static void
+get_std_timing_section(Uchar *c, struct std_timings *r,
+ struct edid_version *v)
+{
+ int i;
+
+ for (i=0;i<STD_TIMINGS;i++){
+ if (VALID_TIMING) {
+ r[i].hsize = HSIZE1;
+ VSIZE1(r[i].vsize);
+ r[i].refresh = REFRESH_R;
+ r[i].id = STD_TIMING_ID;
+ } else {
+ r[i].hsize = r[i].vsize = r[i].refresh = r[i].id = 0;
+ }
+ NEXT_STD_TIMING;
+ }
+}
+
+static const unsigned char empty_block[18];
+
+static void
+fetch_detailed_block(Uchar *c, struct edid_version *ver,
+ struct detailed_monitor_section *det_mon)
+{
+ if (ver->version == 1 && ver->revision >= 1 && IS_MONITOR_DESC) {
+ switch (MONITOR_DESC_TYPE) {
+ case SERIAL_NUMBER:
+ det_mon->type = DS_SERIAL;
+ copy_string(c,det_mon->section.serial);
+ break;
+ case ASCII_STR:
+ det_mon->type = DS_ASCII_STR;
+ copy_string(c,det_mon->section.ascii_data);
+ break;
+ case MONITOR_RANGES:
+ det_mon->type = DS_RANGES;
+ get_monitor_ranges(c,&det_mon->section.ranges);
+ break;
+ case MONITOR_NAME:
+ det_mon->type = DS_NAME;
+ copy_string(c,det_mon->section.name);
+ break;
+ case ADD_COLOR_POINT:
+ det_mon->type = DS_WHITE_P;
+ get_whitepoint_section(c,det_mon->section.wp);
+ break;
+ case ADD_STD_TIMINGS:
+ det_mon->type = DS_STD_TIMINGS;
+ get_dst_timing_section(c,det_mon->section.std_t, ver);
+ break;
+ case COLOR_MANAGEMENT_DATA:
+ det_mon->type = DS_CMD;
+ break;
+ case CVT_3BYTE_DATA:
+ det_mon->type = DS_CVT;
+ get_cvt_timing_section(c, det_mon->section.cvt);
+ break;
+ case ADD_EST_TIMINGS:
+ det_mon->type = DS_EST_III;
+ memcpy(det_mon->section.est_iii, c + 6, 6);
+ break;
+ case ADD_DUMMY:
+ det_mon->type = DS_DUMMY;
+ break;
+ default:
+ det_mon->type = DS_UNKOWN;
+ break;
+ }
+ if (c[3] <= 0x0F && memcmp(c, empty_block, sizeof(empty_block))) {
+ det_mon->type = DS_VENDOR + c[3];
+ }
+ } else {
+ det_mon->type = DT;
+ get_detailed_timing_section(c, &det_mon->section.d_timings);
+ }
+}
+
+static void
+get_dt_md_section(Uchar *c, struct edid_version *ver,
+ struct detailed_monitor_section *det_mon)
+{
+ int i;
+
+ for (i=0; i < DET_TIMINGS; i++) {
+ fetch_detailed_block(c, ver, det_mon + i);
+ NEXT_DT_MD_SECTION;
+ }
+}
+
+static void
+copy_string(Uchar *c, Uchar *s)
+{
+ int i;
+ c = c + 5;
+ for (i = 0; (i < 13 && *c != 0x0A); i++)
+ *(s++) = *(c++);
+ *s = 0;
+ while (i-- && (*--s == 0x20)) *s = 0;
+}
+
+static void
+get_dst_timing_section(Uchar *c, struct std_timings *t,
+ struct edid_version *v)
+{
+ int j;
+ c = c + 5;
+ for (j = 0; j < 5; j++) {
+ t[j].hsize = HSIZE1;
+ VSIZE1(t[j].vsize);
+ t[j].refresh = REFRESH_R;
+ t[j].id = STD_TIMING_ID;
+ NEXT_STD_TIMING;
+ }
+}
+
+static void
+get_monitor_ranges(Uchar *c, struct monitor_ranges *r)
+{
+ r->min_v = MIN_V;
+ r->max_v = MAX_V;
+ r->min_h = MIN_H;
+ r->max_h = MAX_H;
+ r->max_clock = 0;
+ if(MAX_CLOCK != 0xff) /* is specified? */
+ r->max_clock = MAX_CLOCK * 10 + 5;
+ if (HAVE_2ND_GTF) {
+ r->gtf_2nd_f = F_2ND_GTF;
+ r->gtf_2nd_c = C_2ND_GTF;
+ r->gtf_2nd_m = M_2ND_GTF;
+ r->gtf_2nd_k = K_2ND_GTF;
+ r->gtf_2nd_j = J_2ND_GTF;
+ } else {
+ r->gtf_2nd_f = 0;
+ }
+ if (HAVE_CVT) {
+ r->max_clock_khz = MAX_CLOCK_KHZ;
+ r->max_clock = r->max_clock_khz / 1000;
+ r->maxwidth = MAXWIDTH;
+ r->supported_aspect = SUPPORTED_ASPECT;
+ r->preferred_aspect = PREFERRED_ASPECT;
+ r->supported_blanking = SUPPORTED_BLANKING;
+ r->supported_scaling = SUPPORTED_SCALING;
+ r->preferred_refresh = PREFERRED_REFRESH;
+ } else {
+ r->max_clock_khz = 0;
+ }
+}
+
+static void
+get_whitepoint_section(Uchar *c, struct whitePoints *wp)
+{
+ wp[0].white_x = WHITEX1;
+ wp[0].white_y = WHITEY1;
+ wp[1].white_x = WHITEX2;
+ wp[1].white_y = WHITEY2;
+ wp[0].index = WHITE_INDEX1;
+ wp[1].index = WHITE_INDEX2;
+ wp[0].white_gamma = WHITE_GAMMA1;
+ wp[1].white_gamma = WHITE_GAMMA2;
+}
+
+static void
+get_detailed_timing_section(Uchar *c, struct detailed_timings *r)
+{
+ r->clock = PIXEL_CLOCK;
+ r->h_active = H_ACTIVE;
+ r->h_blanking = H_BLANK;
+ r->v_active = V_ACTIVE;
+ r->v_blanking = V_BLANK;
+ r->h_sync_off = H_SYNC_OFF;
+ r->h_sync_width = H_SYNC_WIDTH;
+ r->v_sync_off = V_SYNC_OFF;
+ r->v_sync_width = V_SYNC_WIDTH;
+ r->h_size = H_SIZE;
+ r->v_size = V_SIZE;
+ r->h_border = H_BORDER;
+ r->v_border = V_BORDER;
+ r->interlaced = INTERLACED;
+ r->stereo = STEREO;
+ r->stereo_1 = STEREO1;
+ r->sync = SYNC_T;
+ r->misc = MISC;
+}
+
+#define MAX_EDID_MINOR 4
+
+static Bool
+validate_version(int scrnIndex, struct edid_version *r)
+{
+ if (r->version != 1) {
+ xf86DrvMsg(scrnIndex, X_ERROR, "Unknown EDID version %d\n",
+ r->version);
+ return FALSE;
+ }
+
+ if (r->revision > MAX_EDID_MINOR)
+ xf86DrvMsg(scrnIndex, X_WARNING,
+ "Assuming version 1.%d is compatible with 1.%d\n",
+ r->revision, MAX_EDID_MINOR);
+
+ return TRUE;
+}
+
+/*
+ * Returns true if HDMI, false if definitely not or unknown.
+ */
+Bool
+xf86MonitorIsHDMI(xf86MonPtr mon)
+{
+ int i = 0, version, offset;
+ char *edid = NULL;
+
+ if (!mon)
+ return FALSE;
+
+ if (!(mon->flags & EDID_COMPLETE_RAWDATA))
+ return FALSE;
+
+ if (!mon->no_sections)
+ return FALSE;
+
+ edid = (char *)mon->rawData;
+ if (!edid)
+ return FALSE;
+
+ /* find the CEA extension block */
+ for (i = 1; i <= mon->no_sections; i++)
+ if (edid[i * 128] == 0x02)
+ break;
+ if (i == mon->no_sections + 1)
+ return FALSE;
+ edid += (i * 128);
+
+ version = edid[1];
+ offset = edid[2];
+ if (version < 3 || offset < 4)
+ return FALSE;
+
+ /* walk the cea data blocks */
+ for (i = 4; i < offset; i += (edid[i] & 0x1f) + 1) {
+ char *x = edid + i;
+
+ /* find a vendor specific block */
+ if ((x[0] & 0xe0) >> 5 == 0x03) {
+ int oui = (x[3] << 16) + (x[2] << 8) + x[1];
+
+ /* find the HDMI vendor OUI */
+ if (oui == 0x000c03)
+ return TRUE;
+ }
+ }
+
+ /* guess it's not HDMI after all */
+ return FALSE;
+}
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