summaryrefslogtreecommitdiffstats
path: root/freebsd/sys/dev/videomode/edid.c
diff options
context:
space:
mode:
Diffstat (limited to 'freebsd/sys/dev/videomode/edid.c')
-rw-r--r--freebsd/sys/dev/videomode/edid.c649
1 files changed, 649 insertions, 0 deletions
diff --git a/freebsd/sys/dev/videomode/edid.c b/freebsd/sys/dev/videomode/edid.c
new file mode 100644
index 00000000..f92d3c92
--- /dev/null
+++ b/freebsd/sys/dev/videomode/edid.c
@@ -0,0 +1,649 @@
+#include <machine/rtems-bsd-kernel-space.h>
+
+/* $NetBSD: edid.c,v 1.12 2013/02/08 16:35:10 skrll Exp $ */
+/* $FreeBSD$ */
+
+/*-
+ * Copyright (c) 2006 Itronix Inc.
+ * All rights reserved.
+ *
+ * Written by Garrett D'Amore for Itronix Inc.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ * 3. The name of Itronix Inc. may not be used to endorse
+ * or promote products derived from this software without specific
+ * prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY ITRONIX INC. ``AS IS'' AND ANY EXPRESS
+ * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+ * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL ITRONIX INC. BE LIABLE FOR ANY
+ * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
+ * GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
+ * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+ * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include <sys/cdefs.h>
+__FBSDID("$FreeBSD$");
+
+#include <sys/param.h>
+#include <sys/systm.h>
+#include <sys/kernel.h>
+#include <sys/malloc.h>
+#include <sys/libkern.h>
+#include <dev/videomode/videomode.h>
+#include <dev/videomode/ediddevs.h>
+#include <dev/videomode/edidreg.h>
+#include <dev/videomode/edidvar.h>
+#include <dev/videomode/vesagtf.h>
+
+#define EDIDVERBOSE 1
+#define DIVIDE(x,y) (((x) + ((y) / 2)) / (y))
+
+/* These are reversed established timing order */
+static const char *_edid_modes[] = {
+ "1280x1024x75",
+ "1024x768x75",
+ "1024x768x70",
+ "1024x768x60",
+ "1024x768x87i",
+ "832x624x74", /* rounding error, 74.55 Hz aka "832x624x75" */
+ "800x600x75",
+ "800x600x72",
+ "800x600x60",
+ "800x600x56",
+ "640x480x75",
+ "640x480x72",
+ "640x480x67",
+ "640x480x60",
+ "720x400x87", /* rounding error, 87.85 Hz aka "720x400x88" */
+ "720x400x70",
+};
+
+#ifdef EDIDVERBOSE
+struct edid_vendor {
+ const char *vendor;
+ const char *name;
+};
+
+struct edid_product {
+ const char *vendor;
+ uint16_t product;
+ const char *name;
+};
+
+#include <dev/videomode/ediddevs_data.h>
+#endif /* EDIDVERBOSE */
+
+static const char *
+edid_findvendor(const char *vendor)
+{
+#ifdef EDIDVERBOSE
+ int n;
+
+ for (n = 0; n < edid_nvendors; n++)
+ if (memcmp(edid_vendors[n].vendor, vendor, 3) == 0)
+ return edid_vendors[n].name;
+#endif
+ return NULL;
+}
+
+static const char *
+edid_findproduct(const char *vendor, uint16_t product)
+{
+#ifdef EDIDVERBOSE
+ int n;
+
+ for (n = 0; n < edid_nproducts; n++)
+ if (edid_products[n].product == product &&
+ memcmp(edid_products[n].vendor, vendor, 3) == 0)
+ return edid_products[n].name;
+#endif /* EDIDVERBOSE */
+ return NULL;
+
+}
+
+static void
+edid_strchomp(char *ptr)
+{
+ for (;;) {
+ switch (*ptr) {
+ case '\0':
+ return;
+ case '\r':
+ case '\n':
+ *ptr = '\0';
+ return;
+ }
+ ptr++;
+ }
+}
+
+int
+edid_is_valid(uint8_t *d)
+{
+ int sum = 0, i;
+ uint8_t sig[8] = EDID_SIGNATURE;
+
+ if (memcmp(d, sig, 8) != 0)
+ return EINVAL;
+
+ for (i = 0; i < 128; i++)
+ sum += d[i];
+ if ((sum & 0xff) != 0)
+ return EINVAL;
+
+ return 0;
+}
+
+void
+edid_print(struct edid_info *edid)
+{
+ int i;
+
+ if (edid == NULL)
+ return;
+ printf("Vendor: [%s] %s\n", edid->edid_vendor, edid->edid_vendorname);
+ printf("Product: [%04X] %s\n", edid->edid_product,
+ edid->edid_productname);
+ printf("Serial number: %s\n", edid->edid_serial);
+ printf("Manufactured %d Week %d\n",
+ edid->edid_year, edid->edid_week);
+ printf("EDID Version %d.%d\n", edid->edid_version,
+ edid->edid_revision);
+ printf("EDID Comment: %s\n", edid->edid_comment);
+
+ printf("Video Input: %x\n", edid->edid_video_input);
+ if (edid->edid_video_input & EDID_VIDEO_INPUT_DIGITAL) {
+ printf("\tDigital");
+ if (edid->edid_video_input & EDID_VIDEO_INPUT_DFP1_COMPAT)
+ printf(" (DFP 1.x compatible)");
+ printf("\n");
+ } else {
+ printf("\tAnalog\n");
+ switch (EDID_VIDEO_INPUT_LEVEL(edid->edid_video_input)) {
+ case 0:
+ printf("\t-0.7, 0.3V\n");
+ break;
+ case 1:
+ printf("\t-0.714, 0.286V\n");
+ break;
+ case 2:
+ printf("\t-1.0, 0.4V\n");
+ break;
+ case 3:
+ printf("\t-0.7, 0.0V\n");
+ break;
+ }
+ if (edid->edid_video_input & EDID_VIDEO_INPUT_BLANK_TO_BLACK)
+ printf("\tBlank-to-black setup\n");
+ if (edid->edid_video_input & EDID_VIDEO_INPUT_SEPARATE_SYNCS)
+ printf("\tSeperate syncs\n");
+ if (edid->edid_video_input & EDID_VIDEO_INPUT_COMPOSITE_SYNC)
+ printf("\tComposite sync\n");
+ if (edid->edid_video_input & EDID_VIDEO_INPUT_SYNC_ON_GRN)
+ printf("\tSync on green\n");
+ if (edid->edid_video_input & EDID_VIDEO_INPUT_SERRATION)
+ printf("\tSerration vsync\n");
+ }
+
+ printf("Gamma: %d.%02d\n",
+ edid->edid_gamma / 100, edid->edid_gamma % 100);
+
+ printf("Max Size: %d cm x %d cm\n",
+ edid->edid_max_hsize, edid->edid_max_vsize);
+
+ printf("Features: %x\n", edid->edid_features);
+ if (edid->edid_features & EDID_FEATURES_STANDBY)
+ printf("\tDPMS standby\n");
+ if (edid->edid_features & EDID_FEATURES_SUSPEND)
+ printf("\tDPMS suspend\n");
+ if (edid->edid_features & EDID_FEATURES_ACTIVE_OFF)
+ printf("\tDPMS active-off\n");
+ switch (EDID_FEATURES_DISP_TYPE(edid->edid_features)) {
+ case EDID_FEATURES_DISP_TYPE_MONO:
+ printf("\tMonochrome\n");
+ break;
+ case EDID_FEATURES_DISP_TYPE_RGB:
+ printf("\tRGB\n");
+ break;
+ case EDID_FEATURES_DISP_TYPE_NON_RGB:
+ printf("\tMulticolor\n");
+ break;
+ case EDID_FEATURES_DISP_TYPE_UNDEFINED:
+ printf("\tUndefined monitor type\n");
+ break;
+ }
+ if (edid->edid_features & EDID_FEATURES_STD_COLOR)
+ printf("\tStandard color space\n");
+ if (edid->edid_features & EDID_FEATURES_PREFERRED_TIMING)
+ printf("\tPreferred timing\n");
+ if (edid->edid_features & EDID_FEATURES_DEFAULT_GTF)
+ printf("\tDefault GTF supported\n");
+
+ printf("Chroma Info:\n");
+ printf("\tRed X: 0.%03d\n", edid->edid_chroma.ec_redx);
+ printf("\tRed Y: 0.%03d\n", edid->edid_chroma.ec_redy);
+ printf("\tGrn X: 0.%03d\n", edid->edid_chroma.ec_greenx);
+ printf("\tGrn Y: 0.%03d\n", edid->edid_chroma.ec_greeny);
+ printf("\tBlu X: 0.%03d\n", edid->edid_chroma.ec_bluex);
+ printf("\tBlu Y: 0.%03d\n", edid->edid_chroma.ec_bluey);
+ printf("\tWht X: 0.%03d\n", edid->edid_chroma.ec_whitex);
+ printf("\tWht Y: 0.%03d\n", edid->edid_chroma.ec_whitey);
+
+ if (edid->edid_have_range) {
+ printf("Range:\n");
+ printf("\tHorizontal: %d - %d kHz\n",
+ edid->edid_range.er_min_hfreq,
+ edid->edid_range.er_max_hfreq);
+ printf("\tVertical: %d - %d Hz\n",
+ edid->edid_range.er_min_vfreq,
+ edid->edid_range.er_max_vfreq);
+ printf("\tMax Dot Clock: %d MHz\n",
+ edid->edid_range.er_max_clock);
+ if (edid->edid_range.er_have_gtf2) {
+ printf("\tGTF2 hfreq: %d\n",
+ edid->edid_range.er_gtf2_hfreq);
+ printf("\tGTF2 C: %d\n", edid->edid_range.er_gtf2_c);
+ printf("\tGTF2 M: %d\n", edid->edid_range.er_gtf2_m);
+ printf("\tGTF2 J: %d\n", edid->edid_range.er_gtf2_j);
+ printf("\tGTF2 K: %d\n", edid->edid_range.er_gtf2_k);
+ }
+ }
+ printf("Video modes:\n");
+ for (i = 0; i < edid->edid_nmodes; i++) {
+ printf("\t%dx%d @ %dHz",
+ edid->edid_modes[i].hdisplay,
+ edid->edid_modes[i].vdisplay,
+ DIVIDE(DIVIDE(edid->edid_modes[i].dot_clock * 1000,
+ edid->edid_modes[i].htotal), edid->edid_modes[i].vtotal));
+ printf(" (%d %d %d %d %d %d %d",
+ edid->edid_modes[i].dot_clock,
+ edid->edid_modes[i].hsync_start,
+ edid->edid_modes[i].hsync_end,
+ edid->edid_modes[i].htotal,
+ edid->edid_modes[i].vsync_start,
+ edid->edid_modes[i].vsync_end,
+ edid->edid_modes[i].vtotal);
+ printf(" %s%sH %s%sV)\n",
+ edid->edid_modes[i].flags & VID_PHSYNC ? "+" : "",
+ edid->edid_modes[i].flags & VID_NHSYNC ? "-" : "",
+ edid->edid_modes[i].flags & VID_PVSYNC ? "+" : "",
+ edid->edid_modes[i].flags & VID_NVSYNC ? "-" : "");
+ }
+ if (edid->edid_preferred_mode)
+ printf("Preferred mode: %dx%d @ %dHz\n",
+ edid->edid_preferred_mode->hdisplay,
+ edid->edid_preferred_mode->vdisplay,
+ DIVIDE(DIVIDE(edid->edid_preferred_mode->dot_clock * 1000,
+ edid->edid_preferred_mode->htotal),
+ edid->edid_preferred_mode->vtotal));
+
+ printf("Number of extension blocks: %d\n", edid->edid_ext_block_count);
+}
+
+static const struct videomode *
+edid_mode_lookup_list(const char *name)
+{
+ int i;
+
+ for (i = 0; i < videomode_count; i++)
+ if (strcmp(name, videomode_list[i].name) == 0)
+ return &videomode_list[i];
+ return NULL;
+}
+
+static struct videomode *
+edid_search_mode(struct edid_info *edid, const struct videomode *mode)
+{
+ int refresh, i;
+
+ refresh = DIVIDE(DIVIDE(mode->dot_clock * 1000,
+ mode->htotal), mode->vtotal);
+ for (i = 0; i < edid->edid_nmodes; i++) {
+ if (mode->hdisplay == edid->edid_modes[i].hdisplay &&
+ mode->vdisplay == edid->edid_modes[i].vdisplay &&
+ refresh == DIVIDE(DIVIDE(
+ edid->edid_modes[i].dot_clock * 1000,
+ edid->edid_modes[i].htotal), edid->edid_modes[i].vtotal)) {
+ return &edid->edid_modes[i];
+ }
+ }
+ return NULL;
+}
+
+static int
+edid_std_timing(uint8_t *data, struct videomode *vmp)
+{
+ unsigned x, y, f;
+ const struct videomode *lookup;
+ char name[80];
+
+ if ((data[0] == 1 && data[1] == 1) ||
+ (data[0] == 0 && data[1] == 0) ||
+ (data[0] == 0x20 && data[1] == 0x20))
+ return 0;
+
+ x = EDID_STD_TIMING_HRES(data);
+ switch (EDID_STD_TIMING_RATIO(data)) {
+ case EDID_STD_TIMING_RATIO_16_10:
+ y = x * 10 / 16;
+ break;
+ case EDID_STD_TIMING_RATIO_4_3:
+ y = x * 3 / 4;
+ break;
+ case EDID_STD_TIMING_RATIO_5_4:
+ y = x * 4 / 5;
+ break;
+ case EDID_STD_TIMING_RATIO_16_9:
+ default:
+ y = x * 9 / 16;
+ break;
+ }
+ f = EDID_STD_TIMING_VFREQ(data);
+
+ /* first try to lookup the mode as a DMT timing */
+ snprintf(name, sizeof(name), "%dx%dx%d", x, y, f);
+ if ((lookup = edid_mode_lookup_list(name)) != NULL) {
+ *vmp = *lookup;
+ } else {
+ /* failing that, calculate it using gtf */
+ /*
+ * Hmm. I'm not using alternate GTF timings, which
+ * could, in theory, be present.
+ */
+ vesagtf_mode(x, y, f, vmp);
+ }
+ return 1;
+}
+
+static int
+edid_det_timing(uint8_t *data, struct videomode *vmp)
+{
+ unsigned hactive, hblank, hsyncwid, hsyncoff;
+ unsigned vactive, vblank, vsyncwid, vsyncoff;
+ uint8_t flags;
+
+ flags = EDID_DET_TIMING_FLAGS(data);
+
+ /* we don't support stereo modes (for now) */
+ if (flags & (EDID_DET_TIMING_FLAG_STEREO |
+ EDID_DET_TIMING_FLAG_STEREO_MODE))
+ return 0;
+
+ vmp->dot_clock = EDID_DET_TIMING_DOT_CLOCK(data) / 1000;
+
+ hactive = EDID_DET_TIMING_HACTIVE(data);
+ hblank = EDID_DET_TIMING_HBLANK(data);
+ hsyncwid = EDID_DET_TIMING_HSYNC_WIDTH(data);
+ hsyncoff = EDID_DET_TIMING_HSYNC_OFFSET(data);
+
+ vactive = EDID_DET_TIMING_VACTIVE(data);
+ vblank = EDID_DET_TIMING_VBLANK(data);
+ vsyncwid = EDID_DET_TIMING_VSYNC_WIDTH(data);
+ vsyncoff = EDID_DET_TIMING_VSYNC_OFFSET(data);
+
+ /* Borders are contained within the blank areas. */
+
+ vmp->hdisplay = hactive;
+ vmp->htotal = hactive + hblank;
+ vmp->hsync_start = hactive + hsyncoff;
+ vmp->hsync_end = vmp->hsync_start + hsyncwid;
+
+ vmp->vdisplay = vactive;
+ vmp->vtotal = vactive + vblank;
+ vmp->vsync_start = vactive + vsyncoff;
+ vmp->vsync_end = vmp->vsync_start + vsyncwid;
+
+ vmp->flags = 0;
+
+ if (flags & EDID_DET_TIMING_FLAG_INTERLACE)
+ vmp->flags |= VID_INTERLACE;
+ if (flags & EDID_DET_TIMING_FLAG_HSYNC_POSITIVE)
+ vmp->flags |= VID_PHSYNC;
+ else
+ vmp->flags |= VID_NHSYNC;
+
+ if (flags & EDID_DET_TIMING_FLAG_VSYNC_POSITIVE)
+ vmp->flags |= VID_PVSYNC;
+ else
+ vmp->flags |= VID_NVSYNC;
+
+ return 1;
+}
+
+static void
+edid_block(struct edid_info *edid, uint8_t *data)
+{
+ int i;
+ struct videomode mode, *exist_mode;
+
+ if (EDID_BLOCK_IS_DET_TIMING(data)) {
+ if (!edid_det_timing(data, &mode))
+ return;
+ /* Does this mode already exist? */
+ exist_mode = edid_search_mode(edid, &mode);
+ if (exist_mode != NULL) {
+ *exist_mode = mode;
+ if (edid->edid_preferred_mode == NULL)
+ edid->edid_preferred_mode = exist_mode;
+ } else {
+ edid->edid_modes[edid->edid_nmodes] = mode;
+ if (edid->edid_preferred_mode == NULL)
+ edid->edid_preferred_mode =
+ &edid->edid_modes[edid->edid_nmodes];
+ edid->edid_nmodes++;
+ }
+ return;
+ }
+
+ switch (EDID_BLOCK_TYPE(data)) {
+ case EDID_DESC_BLOCK_TYPE_SERIAL:
+ memcpy(edid->edid_serial, data + EDID_DESC_ASCII_DATA_OFFSET,
+ EDID_DESC_ASCII_DATA_LEN);
+ edid->edid_serial[sizeof(edid->edid_serial) - 1] = 0;
+ break;
+
+ case EDID_DESC_BLOCK_TYPE_ASCII:
+ memcpy(edid->edid_comment, data + EDID_DESC_ASCII_DATA_OFFSET,
+ EDID_DESC_ASCII_DATA_LEN);
+ edid->edid_comment[sizeof(edid->edid_comment) - 1] = 0;
+ break;
+
+ case EDID_DESC_BLOCK_TYPE_RANGE:
+ edid->edid_have_range = 1;
+ edid->edid_range.er_min_vfreq = EDID_DESC_RANGE_MIN_VFREQ(data);
+ edid->edid_range.er_max_vfreq = EDID_DESC_RANGE_MAX_VFREQ(data);
+ edid->edid_range.er_min_hfreq = EDID_DESC_RANGE_MIN_HFREQ(data);
+ edid->edid_range.er_max_hfreq = EDID_DESC_RANGE_MAX_HFREQ(data);
+ edid->edid_range.er_max_clock = EDID_DESC_RANGE_MAX_CLOCK(data);
+ if (!EDID_DESC_RANGE_HAVE_GTF2(data))
+ break;
+ edid->edid_range.er_have_gtf2 = 1;
+ edid->edid_range.er_gtf2_hfreq =
+ EDID_DESC_RANGE_GTF2_HFREQ(data);
+ edid->edid_range.er_gtf2_c = EDID_DESC_RANGE_GTF2_C(data);
+ edid->edid_range.er_gtf2_m = EDID_DESC_RANGE_GTF2_M(data);
+ edid->edid_range.er_gtf2_j = EDID_DESC_RANGE_GTF2_J(data);
+ edid->edid_range.er_gtf2_k = EDID_DESC_RANGE_GTF2_K(data);
+ break;
+
+ case EDID_DESC_BLOCK_TYPE_NAME:
+ /* copy the product name into place */
+ memcpy(edid->edid_productname,
+ data + EDID_DESC_ASCII_DATA_OFFSET,
+ EDID_DESC_ASCII_DATA_LEN);
+ break;
+
+ case EDID_DESC_BLOCK_TYPE_STD_TIMING:
+ data += EDID_DESC_STD_TIMING_START;
+ for (i = 0; i < EDID_DESC_STD_TIMING_COUNT; i++) {
+ if (edid_std_timing(data, &mode)) {
+ /* Does this mode already exist? */
+ exist_mode = edid_search_mode(edid, &mode);
+ if (exist_mode == NULL) {
+ edid->edid_modes[edid->edid_nmodes] =
+ mode;
+ edid->edid_nmodes++;
+ }
+ }
+ data += 2;
+ }
+ break;
+
+ case EDID_DESC_BLOCK_TYPE_COLOR_POINT:
+ /* XXX: not implemented yet */
+ break;
+ }
+}
+
+/*
+ * Gets EDID version in BCD, e.g. EDID v1.3 returned as 0x0103
+ */
+int
+edid_parse(uint8_t *data, struct edid_info *edid)
+{
+ uint16_t manfid, estmodes;
+ const struct videomode *vmp;
+ int i;
+ const char *name;
+ int max_dotclock = 0;
+ int mhz;
+
+ if (edid_is_valid(data) != 0)
+ return -1;
+
+ /* get product identification */
+ manfid = EDID_VENDOR_ID(data);
+ edid->edid_vendor[0] = EDID_MANFID_0(manfid);
+ edid->edid_vendor[1] = EDID_MANFID_1(manfid);
+ edid->edid_vendor[2] = EDID_MANFID_2(manfid);
+ edid->edid_vendor[3] = 0; /* null terminate for convenience */
+
+ edid->edid_product = data[EDID_OFFSET_PRODUCT_ID] +
+ (data[EDID_OFFSET_PRODUCT_ID + 1] << 8);
+
+ name = edid_findvendor(edid->edid_vendor);
+ if (name != NULL)
+ strlcpy(edid->edid_vendorname, name,
+ sizeof(edid->edid_vendorname));
+ else
+ edid->edid_vendorname[0] = '\0';
+
+ name = edid_findproduct(edid->edid_vendor, edid->edid_product);
+ if (name != NULL)
+ strlcpy(edid->edid_productname, name,
+ sizeof(edid->edid_productname));
+ else
+ edid->edid_productname[0] = '\0';
+
+ snprintf(edid->edid_serial, sizeof(edid->edid_serial), "%08x",
+ EDID_SERIAL_NUMBER(data));
+
+ edid->edid_week = EDID_WEEK(data);
+ edid->edid_year = EDID_YEAR(data);
+
+ /* get edid revision */
+ edid->edid_version = EDID_VERSION(data);
+ edid->edid_revision = EDID_REVISION(data);
+
+ edid->edid_video_input = EDID_VIDEO_INPUT(data);
+ edid->edid_max_hsize = EDID_MAX_HSIZE(data);
+ edid->edid_max_vsize = EDID_MAX_VSIZE(data);
+
+ edid->edid_gamma = EDID_GAMMA(data);
+ edid->edid_features = EDID_FEATURES(data);
+
+ edid->edid_chroma.ec_redx = EDID_CHROMA_REDX(data);
+ edid->edid_chroma.ec_redy = EDID_CHROMA_REDX(data);
+ edid->edid_chroma.ec_greenx = EDID_CHROMA_GREENX(data);
+ edid->edid_chroma.ec_greeny = EDID_CHROMA_GREENY(data);
+ edid->edid_chroma.ec_bluex = EDID_CHROMA_BLUEX(data);
+ edid->edid_chroma.ec_bluey = EDID_CHROMA_BLUEY(data);
+ edid->edid_chroma.ec_whitex = EDID_CHROMA_WHITEX(data);
+ edid->edid_chroma.ec_whitey = EDID_CHROMA_WHITEY(data);
+
+ edid->edid_ext_block_count = EDID_EXT_BLOCK_COUNT(data);
+
+ /* lookup established modes */
+ edid->edid_nmodes = 0;
+ edid->edid_preferred_mode = NULL;
+ estmodes = EDID_EST_TIMING(data);
+ /* Iterate in esztablished timing order */
+ for (i = 15; i >= 0; i--) {
+ if (estmodes & (1 << i)) {
+ vmp = edid_mode_lookup_list(_edid_modes[i]);
+ if (vmp != NULL) {
+ edid->edid_modes[edid->edid_nmodes] = *vmp;
+ edid->edid_nmodes++;
+ }
+#ifdef DIAGNOSTIC
+ else
+ printf("no data for est. mode %s\n",
+ _edid_modes[i]);
+#endif
+ }
+ }
+
+ /* do standard timing section */
+ for (i = 0; i < EDID_STD_TIMING_COUNT; i++) {
+ struct videomode mode, *exist_mode;
+ if (edid_std_timing(data + EDID_OFFSET_STD_TIMING + i * 2,
+ &mode)) {
+ /* Does this mode already exist? */
+ exist_mode = edid_search_mode(edid, &mode);
+ if (exist_mode == NULL) {
+ edid->edid_modes[edid->edid_nmodes] = mode;
+ edid->edid_nmodes++;
+ }
+ }
+ }
+
+ /* do detailed timings and descriptors */
+ for (i = 0; i < EDID_BLOCK_COUNT; i++) {
+ edid_block(edid, data + EDID_OFFSET_DESC_BLOCK +
+ i * EDID_BLOCK_SIZE);
+ }
+
+ edid_strchomp(edid->edid_vendorname);
+ edid_strchomp(edid->edid_productname);
+ edid_strchomp(edid->edid_serial);
+ edid_strchomp(edid->edid_comment);
+
+ /*
+ * XXX
+ * some monitors lie about their maximum supported dot clock
+ * by claiming to support modes which need a higher dot clock
+ * than the stated maximum.
+ * For sanity's sake we bump it to the highest dot clock we find
+ * in the list of supported modes
+ */
+ for (i = 0; i < edid->edid_nmodes; i++)
+ if (edid->edid_modes[i].dot_clock > max_dotclock)
+ max_dotclock = edid->edid_modes[i].dot_clock;
+ if (bootverbose) {
+ printf("edid: max_dotclock according to supported modes: %d\n",
+ max_dotclock);
+ }
+ mhz = (max_dotclock + 999) / 1000;
+
+ if (edid->edid_have_range) {
+ if (mhz > edid->edid_range.er_max_clock)
+ edid->edid_range.er_max_clock = mhz;
+ } else
+ edid->edid_range.er_max_clock = mhz;
+
+ return 0;
+}
+
generated by cgit v1.2.3 (git 2.25.1) at 2024-04-19 07:48:04 +0000