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-rw-r--r--roms/u-boot/common/edid.c507
1 files changed, 507 insertions, 0 deletions
diff --git a/roms/u-boot/common/edid.c b/roms/u-boot/common/edid.c
new file mode 100644
index 000000000..fa85bcd6a
--- /dev/null
+++ b/roms/u-boot/common/edid.c
@@ -0,0 +1,507 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Copyright (c) 2012 The Chromium OS Authors.
+ *
+ * (C) Copyright 2010
+ * Petr Stetiar <ynezz@true.cz>
+ *
+ * Contains stolen code from ddcprobe project which is:
+ * Copyright (C) Nalin Dahyabhai <bigfun@pobox.com>
+ */
+
+#include <common.h>
+#include <edid.h>
+#include <errno.h>
+#include <fdtdec.h>
+#include <log.h>
+#include <linux/ctype.h>
+#include <linux/string.h>
+
+int edid_check_info(struct edid1_info *edid_info)
+{
+ if ((edid_info == NULL) || (edid_info->version == 0))
+ return -1;
+
+ if (memcmp(edid_info->header, "\x0\xff\xff\xff\xff\xff\xff\x0", 8))
+ return -1;
+
+ if (edid_info->version == 0xff && edid_info->revision == 0xff)
+ return -1;
+
+ return 0;
+}
+
+int edid_check_checksum(u8 *edid_block)
+{
+ u8 checksum = 0;
+ int i;
+
+ for (i = 0; i < 128; i++)
+ checksum += edid_block[i];
+
+ return (checksum == 0) ? 0 : -EINVAL;
+}
+
+int edid_get_ranges(struct edid1_info *edid, unsigned int *hmin,
+ unsigned int *hmax, unsigned int *vmin,
+ unsigned int *vmax)
+{
+ int i;
+ struct edid_monitor_descriptor *monitor;
+
+ *hmin = *hmax = *vmin = *vmax = 0;
+ if (edid_check_info(edid))
+ return -1;
+
+ for (i = 0; i < ARRAY_SIZE(edid->monitor_details.descriptor); i++) {
+ monitor = &edid->monitor_details.descriptor[i];
+ if (monitor->type == EDID_MONITOR_DESCRIPTOR_RANGE) {
+ *hmin = monitor->data.range_data.horizontal_min;
+ *hmax = monitor->data.range_data.horizontal_max;
+ *vmin = monitor->data.range_data.vertical_min;
+ *vmax = monitor->data.range_data.vertical_max;
+ return 0;
+ }
+ }
+ return -1;
+}
+
+/* Set all parts of a timing entry to the same value */
+static void set_entry(struct timing_entry *entry, u32 value)
+{
+ entry->min = value;
+ entry->typ = value;
+ entry->max = value;
+}
+
+/**
+ * decode_timing() - Decoding an 18-byte detailed timing record
+ *
+ * @buf: Pointer to EDID detailed timing record
+ * @timing: Place to put timing
+ */
+static void decode_timing(u8 *buf, struct display_timing *timing)
+{
+ uint x_mm, y_mm;
+ unsigned int ha, hbl, hso, hspw, hborder;
+ unsigned int va, vbl, vso, vspw, vborder;
+ struct edid_detailed_timing *t = (struct edid_detailed_timing *)buf;
+
+ /* Edid contains pixel clock in terms of 10KHz */
+ set_entry(&timing->pixelclock, (buf[0] + (buf[1] << 8)) * 10000);
+ x_mm = (buf[12] + ((buf[14] & 0xf0) << 4));
+ y_mm = (buf[13] + ((buf[14] & 0x0f) << 8));
+ ha = (buf[2] + ((buf[4] & 0xf0) << 4));
+ hbl = (buf[3] + ((buf[4] & 0x0f) << 8));
+ hso = (buf[8] + ((buf[11] & 0xc0) << 2));
+ hspw = (buf[9] + ((buf[11] & 0x30) << 4));
+ hborder = buf[15];
+ va = (buf[5] + ((buf[7] & 0xf0) << 4));
+ vbl = (buf[6] + ((buf[7] & 0x0f) << 8));
+ vso = ((buf[10] >> 4) + ((buf[11] & 0x0c) << 2));
+ vspw = ((buf[10] & 0x0f) + ((buf[11] & 0x03) << 4));
+ vborder = buf[16];
+
+ set_entry(&timing->hactive, ha);
+ set_entry(&timing->hfront_porch, hso);
+ set_entry(&timing->hback_porch, hbl - hso - hspw);
+ set_entry(&timing->hsync_len, hspw);
+
+ set_entry(&timing->vactive, va);
+ set_entry(&timing->vfront_porch, vso);
+ set_entry(&timing->vback_porch, vbl - vso - vspw);
+ set_entry(&timing->vsync_len, vspw);
+
+ timing->flags = 0;
+ if (EDID_DETAILED_TIMING_FLAG_HSYNC_POLARITY(*t))
+ timing->flags |= DISPLAY_FLAGS_HSYNC_HIGH;
+ else
+ timing->flags |= DISPLAY_FLAGS_HSYNC_LOW;
+ if (EDID_DETAILED_TIMING_FLAG_VSYNC_POLARITY(*t))
+ timing->flags |= DISPLAY_FLAGS_VSYNC_HIGH;
+ else
+ timing->flags |= DISPLAY_FLAGS_VSYNC_LOW;
+
+ if (EDID_DETAILED_TIMING_FLAG_INTERLACED(*t))
+ timing->flags = DISPLAY_FLAGS_INTERLACED;
+
+ debug("Detailed mode clock %u Hz, %d mm x %d mm\n"
+ " %04x %04x %04x %04x hborder %x\n"
+ " %04x %04x %04x %04x vborder %x\n",
+ timing->pixelclock.typ,
+ x_mm, y_mm,
+ ha, ha + hso, ha + hso + hspw,
+ ha + hbl, hborder,
+ va, va + vso, va + vso + vspw,
+ va + vbl, vborder);
+}
+
+/**
+ * Check if HDMI vendor specific data block is present in CEA block
+ * @param info CEA extension block
+ * @return true if block is found
+ */
+static bool cea_is_hdmi_vsdb_present(struct edid_cea861_info *info)
+{
+ u8 end, i = 0;
+
+ /* check for end of data block */
+ end = info->dtd_offset;
+ if (end == 0)
+ end = sizeof(info->data);
+ if (end < 4 || end > sizeof(info->data))
+ return false;
+ end -= 4;
+
+ while (i < end) {
+ /* Look for vendor specific data block of appropriate size */
+ if ((EDID_CEA861_DB_TYPE(*info, i) == EDID_CEA861_DB_VENDOR) &&
+ (EDID_CEA861_DB_LEN(*info, i) >= 5)) {
+ u8 *db = &info->data[i + 1];
+ u32 oui = db[0] | (db[1] << 8) | (db[2] << 16);
+
+ if (oui == HDMI_IEEE_OUI)
+ return true;
+ }
+ i += EDID_CEA861_DB_LEN(*info, i) + 1;
+ }
+
+ return false;
+}
+
+static bool edid_find_valid_timing(void *buf, int count,
+ struct display_timing *timing,
+ bool (*mode_valid)(void *priv,
+ const struct display_timing *timing),
+ void *mode_valid_priv)
+{
+ struct edid_detailed_timing *t = buf;
+ bool found = false;
+ int i;
+
+ for (i = 0; i < count && !found; i++, t++)
+ if (EDID_DETAILED_TIMING_PIXEL_CLOCK(*t) != 0) {
+ decode_timing((u8 *)t, timing);
+ if (mode_valid)
+ found = mode_valid(mode_valid_priv,
+ timing);
+ else
+ found = true;
+ }
+
+ return found;
+}
+
+int edid_get_timing_validate(u8 *buf, int buf_size,
+ struct display_timing *timing,
+ int *panel_bits_per_colourp,
+ bool (*mode_valid)(void *priv,
+ const struct display_timing *timing),
+ void *mode_valid_priv)
+{
+ struct edid1_info *edid = (struct edid1_info *)buf;
+ bool found;
+
+ if (buf_size < sizeof(*edid) || edid_check_info(edid)) {
+ debug("%s: Invalid buffer\n", __func__);
+ return -EINVAL;
+ }
+
+ if (!EDID1_INFO_VIDEO_INPUT_DIGITAL(*edid)) {
+ debug("%s: Not a digital display\n", __func__);
+ return -ENOSYS;
+ }
+
+ if (!EDID1_INFO_FEATURE_PREFERRED_TIMING_MODE(*edid)) {
+ debug("%s: No preferred timing\n", __func__);
+ return -ENOENT;
+ }
+
+ /* Look for detailed timing in base EDID */
+ found = edid_find_valid_timing(edid->monitor_details.descriptor, 4,
+ timing, mode_valid, mode_valid_priv);
+
+ /* Look for detailed timing in CTA-861 Extension Block */
+ if (!found && edid->extension_flag && buf_size >= EDID_EXT_SIZE) {
+ struct edid_cea861_info *info =
+ (struct edid_cea861_info *)(buf + sizeof(*edid));
+
+ if (info->extension_tag == EDID_CEA861_EXTENSION_TAG) {
+ int count = EDID_CEA861_DTD_COUNT(*info);
+ int offset = info->dtd_offset;
+ int size = count * sizeof(struct edid_detailed_timing);
+
+ if (offset >= 4 && offset + size < EDID_SIZE)
+ found = edid_find_valid_timing(
+ (u8 *)info + offset, count, timing,
+ mode_valid, mode_valid_priv);
+ }
+ }
+
+ if (!found)
+ return -EINVAL;
+
+ if (edid->version != 1 || edid->revision < 4) {
+ debug("%s: EDID version %d.%d does not have required info\n",
+ __func__, edid->version, edid->revision);
+ *panel_bits_per_colourp = -1;
+ } else {
+ *panel_bits_per_colourp =
+ ((edid->video_input_definition & 0x70) >> 3) + 4;
+ }
+
+ timing->hdmi_monitor = false;
+ if (edid->extension_flag && (buf_size >= EDID_EXT_SIZE)) {
+ struct edid_cea861_info *info =
+ (struct edid_cea861_info *)(buf + sizeof(*edid));
+
+ if (info->extension_tag == EDID_CEA861_EXTENSION_TAG)
+ timing->hdmi_monitor = cea_is_hdmi_vsdb_present(info);
+ }
+
+ return 0;
+}
+
+int edid_get_timing(u8 *buf, int buf_size, struct display_timing *timing,
+ int *panel_bits_per_colourp)
+{
+ return edid_get_timing_validate(buf, buf_size, timing,
+ panel_bits_per_colourp, NULL, NULL);
+}
+
+
+/**
+ * Snip the tailing whitespace/return of a string.
+ *
+ * @param string The string to be snipped
+ * @return the snipped string
+ */
+static char *snip(char *string)
+{
+ char *s;
+
+ /*
+ * This is always a 13 character buffer
+ * and it's not always terminated.
+ */
+ string[12] = '\0';
+ s = &string[strlen(string) - 1];
+
+ while (s >= string && (isspace(*s) || *s == '\n' || *s == '\r' ||
+ *s == '\0'))
+ *(s--) = '\0';
+
+ return string;
+}
+
+/**
+ * Print an EDID monitor descriptor block
+ *
+ * @param monitor The EDID monitor descriptor block
+ * @have_timing Modifies to 1 if the desciptor contains timing info
+ */
+static void edid_print_dtd(struct edid_monitor_descriptor *monitor,
+ unsigned int *have_timing)
+{
+ unsigned char *bytes = (unsigned char *)monitor;
+ struct edid_detailed_timing *timing =
+ (struct edid_detailed_timing *)monitor;
+
+ if (bytes[0] == 0 && bytes[1] == 0) {
+ if (monitor->type == EDID_MONITOR_DESCRIPTOR_SERIAL)
+ printf("Monitor serial number: %s\n",
+ snip(monitor->data.string));
+ else if (monitor->type == EDID_MONITOR_DESCRIPTOR_ASCII)
+ printf("Monitor ID: %s\n",
+ snip(monitor->data.string));
+ else if (monitor->type == EDID_MONITOR_DESCRIPTOR_NAME)
+ printf("Monitor name: %s\n",
+ snip(monitor->data.string));
+ else if (monitor->type == EDID_MONITOR_DESCRIPTOR_RANGE)
+ printf("Monitor range limits, horizontal sync: "
+ "%d-%d kHz, vertical refresh: "
+ "%d-%d Hz, max pixel clock: "
+ "%d MHz\n",
+ monitor->data.range_data.horizontal_min,
+ monitor->data.range_data.horizontal_max,
+ monitor->data.range_data.vertical_min,
+ monitor->data.range_data.vertical_max,
+ monitor->data.range_data.pixel_clock_max * 10);
+ } else {
+ uint32_t pixclock, h_active, h_blanking, v_active, v_blanking;
+ uint32_t h_total, v_total, vfreq;
+
+ pixclock = EDID_DETAILED_TIMING_PIXEL_CLOCK(*timing);
+ h_active = EDID_DETAILED_TIMING_HORIZONTAL_ACTIVE(*timing);
+ h_blanking = EDID_DETAILED_TIMING_HORIZONTAL_BLANKING(*timing);
+ v_active = EDID_DETAILED_TIMING_VERTICAL_ACTIVE(*timing);
+ v_blanking = EDID_DETAILED_TIMING_VERTICAL_BLANKING(*timing);
+
+ h_total = h_active + h_blanking;
+ v_total = v_active + v_blanking;
+ if (v_total > 0 && h_total > 0)
+ vfreq = pixclock / (v_total * h_total);
+ else
+ vfreq = 1; /* Error case */
+ printf("\t%dx%d\%c\t%d Hz (detailed)\n", h_active,
+ v_active, h_active > 1000 ? ' ' : '\t', vfreq);
+ *have_timing = 1;
+ }
+}
+
+/**
+ * Get the manufacturer name from an EDID info.
+ *
+ * @param edid_info The EDID info to be printed
+ * @param name Returns the string of the manufacturer name
+ */
+static void edid_get_manufacturer_name(struct edid1_info *edid, char *name)
+{
+ name[0] = EDID1_INFO_MANUFACTURER_NAME_CHAR1(*edid) + 'A' - 1;
+ name[1] = EDID1_INFO_MANUFACTURER_NAME_CHAR2(*edid) + 'A' - 1;
+ name[2] = EDID1_INFO_MANUFACTURER_NAME_CHAR3(*edid) + 'A' - 1;
+ name[3] = '\0';
+}
+
+void edid_print_info(struct edid1_info *edid_info)
+{
+ int i;
+ char manufacturer[4];
+ unsigned int have_timing = 0;
+ uint32_t serial_number;
+
+ if (edid_check_info(edid_info)) {
+ printf("Not a valid EDID\n");
+ return;
+ }
+
+ printf("EDID version: %d.%d\n",
+ edid_info->version, edid_info->revision);
+
+ printf("Product ID code: %04x\n", EDID1_INFO_PRODUCT_CODE(*edid_info));
+
+ edid_get_manufacturer_name(edid_info, manufacturer);
+ printf("Manufacturer: %s\n", manufacturer);
+
+ serial_number = EDID1_INFO_SERIAL_NUMBER(*edid_info);
+ if (serial_number != 0xffffffff) {
+ if (strcmp(manufacturer, "MAG") == 0)
+ serial_number -= 0x7000000;
+ if (strcmp(manufacturer, "OQI") == 0)
+ serial_number -= 456150000;
+ if (strcmp(manufacturer, "VSC") == 0)
+ serial_number -= 640000000;
+ }
+ printf("Serial number: %08x\n", serial_number);
+ printf("Manufactured in week: %d year: %d\n",
+ edid_info->week, edid_info->year + 1990);
+
+ printf("Video input definition: %svoltage level %d%s%s%s%s%s\n",
+ EDID1_INFO_VIDEO_INPUT_DIGITAL(*edid_info) ?
+ "digital signal, " : "analog signal, ",
+ EDID1_INFO_VIDEO_INPUT_VOLTAGE_LEVEL(*edid_info),
+ EDID1_INFO_VIDEO_INPUT_BLANK_TO_BLACK(*edid_info) ?
+ ", blank to black" : "",
+ EDID1_INFO_VIDEO_INPUT_SEPARATE_SYNC(*edid_info) ?
+ ", separate sync" : "",
+ EDID1_INFO_VIDEO_INPUT_COMPOSITE_SYNC(*edid_info) ?
+ ", composite sync" : "",
+ EDID1_INFO_VIDEO_INPUT_SYNC_ON_GREEN(*edid_info) ?
+ ", sync on green" : "",
+ EDID1_INFO_VIDEO_INPUT_SERRATION_V(*edid_info) ?
+ ", serration v" : "");
+
+ printf("Monitor is %s\n",
+ EDID1_INFO_FEATURE_RGB(*edid_info) ? "RGB" : "non-RGB");
+
+ printf("Maximum visible display size: %d cm x %d cm\n",
+ edid_info->max_size_horizontal,
+ edid_info->max_size_vertical);
+
+ printf("Power management features: %s%s, %s%s, %s%s\n",
+ EDID1_INFO_FEATURE_ACTIVE_OFF(*edid_info) ?
+ "" : "no ", "active off",
+ EDID1_INFO_FEATURE_SUSPEND(*edid_info) ? "" : "no ", "suspend",
+ EDID1_INFO_FEATURE_STANDBY(*edid_info) ? "" : "no ", "standby");
+
+ printf("Estabilished timings:\n");
+ if (EDID1_INFO_ESTABLISHED_TIMING_720X400_70(*edid_info))
+ printf("\t720x400\t\t70 Hz (VGA 640x400, IBM)\n");
+ if (EDID1_INFO_ESTABLISHED_TIMING_720X400_88(*edid_info))
+ printf("\t720x400\t\t88 Hz (XGA2)\n");
+ if (EDID1_INFO_ESTABLISHED_TIMING_640X480_60(*edid_info))
+ printf("\t640x480\t\t60 Hz (VGA)\n");
+ if (EDID1_INFO_ESTABLISHED_TIMING_640X480_67(*edid_info))
+ printf("\t640x480\t\t67 Hz (Mac II, Apple)\n");
+ if (EDID1_INFO_ESTABLISHED_TIMING_640X480_72(*edid_info))
+ printf("\t640x480\t\t72 Hz (VESA)\n");
+ if (EDID1_INFO_ESTABLISHED_TIMING_640X480_75(*edid_info))
+ printf("\t640x480\t\t75 Hz (VESA)\n");
+ if (EDID1_INFO_ESTABLISHED_TIMING_800X600_56(*edid_info))
+ printf("\t800x600\t\t56 Hz (VESA)\n");
+ if (EDID1_INFO_ESTABLISHED_TIMING_800X600_60(*edid_info))
+ printf("\t800x600\t\t60 Hz (VESA)\n");
+ if (EDID1_INFO_ESTABLISHED_TIMING_800X600_72(*edid_info))
+ printf("\t800x600\t\t72 Hz (VESA)\n");
+ if (EDID1_INFO_ESTABLISHED_TIMING_800X600_75(*edid_info))
+ printf("\t800x600\t\t75 Hz (VESA)\n");
+ if (EDID1_INFO_ESTABLISHED_TIMING_832X624_75(*edid_info))
+ printf("\t832x624\t\t75 Hz (Mac II)\n");
+ if (EDID1_INFO_ESTABLISHED_TIMING_1024X768_87I(*edid_info))
+ printf("\t1024x768\t87 Hz Interlaced (8514A)\n");
+ if (EDID1_INFO_ESTABLISHED_TIMING_1024X768_60(*edid_info))
+ printf("\t1024x768\t60 Hz (VESA)\n");
+ if (EDID1_INFO_ESTABLISHED_TIMING_1024X768_70(*edid_info))
+ printf("\t1024x768\t70 Hz (VESA)\n");
+ if (EDID1_INFO_ESTABLISHED_TIMING_1024X768_75(*edid_info))
+ printf("\t1024x768\t75 Hz (VESA)\n");
+ if (EDID1_INFO_ESTABLISHED_TIMING_1280X1024_75(*edid_info))
+ printf("\t1280x1024\t75 (VESA)\n");
+ if (EDID1_INFO_ESTABLISHED_TIMING_1152X870_75(*edid_info))
+ printf("\t1152x870\t75 (Mac II)\n");
+
+ /* Standard timings. */
+ printf("Standard timings:\n");
+ for (i = 0; i < ARRAY_SIZE(edid_info->standard_timings); i++) {
+ unsigned int aspect = 10000;
+ unsigned int x, y;
+ unsigned char xres, vfreq;
+
+ xres = EDID1_INFO_STANDARD_TIMING_XRESOLUTION(*edid_info, i);
+ vfreq = EDID1_INFO_STANDARD_TIMING_VFREQ(*edid_info, i);
+ if ((xres != vfreq) ||
+ ((xres != 0) && (xres != 1)) ||
+ ((vfreq != 0) && (vfreq != 1))) {
+ switch (EDID1_INFO_STANDARD_TIMING_ASPECT(*edid_info,
+ i)) {
+ case ASPECT_625:
+ aspect = 6250;
+ break;
+ case ASPECT_75:
+ aspect = 7500;
+ break;
+ case ASPECT_8:
+ aspect = 8000;
+ break;
+ case ASPECT_5625:
+ aspect = 5625;
+ break;
+ }
+ x = (xres + 31) * 8;
+ y = x * aspect / 10000;
+ printf("\t%dx%d%c\t%d Hz\n", x, y,
+ x > 1000 ? ' ' : '\t', (vfreq & 0x3f) + 60);
+ have_timing = 1;
+ }
+ }
+
+ /* Detailed timing information. */
+ for (i = 0; i < ARRAY_SIZE(edid_info->monitor_details.descriptor);
+ i++) {
+ edid_print_dtd(&edid_info->monitor_details.descriptor[i],
+ &have_timing);
+ }
+
+ if (!have_timing)
+ printf("\tNone\n");
+}