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Diffstat (limited to 'src/backends/edid-parse.c')
-rw-r--r--src/backends/edid-parse.c542
1 files changed, 0 insertions, 542 deletions
diff --git a/src/backends/edid-parse.c b/src/backends/edid-parse.c
deleted file mode 100644
index a7b9fd225..000000000
--- a/src/backends/edid-parse.c
+++ /dev/null
@@ -1,542 +0,0 @@
-/*
- * 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
- * on the rights to use, copy, modify, merge, publish, distribute, sub
- * license, 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 NON-INFRINGEMENT. IN NO EVENT SHALL
- * THE AUTHORS 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.
- */
-
-/* Author: Soren Sandmann <sandmann@redhat.com> */
-
-#include "config.h"
-
-#include <stdlib.h>
-#include <string.h>
-#include <math.h>
-#include <glib.h>
-
-#include "backends/edid.h"
-
-static int
-get_bit (int in, int bit)
-{
- return (in & (1 << bit)) >> bit;
-}
-
-static int
-get_bits (int in, int begin, int end)
-{
- int mask = (1 << (end - begin + 1)) - 1;
-
- return (in >> begin) & mask;
-}
-
-static int
-decode_header (const uchar *edid)
-{
- if (memcmp (edid, "\x00\xff\xff\xff\xff\xff\xff\x00", 8) == 0)
- return TRUE;
- return FALSE;
-}
-
-static int
-decode_vendor_and_product_identification (const uchar *edid, MonitorInfo *info)
-{
- int is_model_year;
-
- /* Manufacturer Code */
- info->manufacturer_code[0] = get_bits (edid[0x08], 2, 6);
- info->manufacturer_code[1] = get_bits (edid[0x08], 0, 1) << 3;
- info->manufacturer_code[1] |= get_bits (edid[0x09], 5, 7);
- info->manufacturer_code[2] = get_bits (edid[0x09], 0, 4);
- info->manufacturer_code[3] = '\0';
-
- info->manufacturer_code[0] += 'A' - 1;
- info->manufacturer_code[1] += 'A' - 1;
- info->manufacturer_code[2] += 'A' - 1;
-
- /* Product Code */
- info->product_code = edid[0x0b] << 8 | edid[0x0a];
-
- /* Serial Number */
- info->serial_number =
- edid[0x0c] | edid[0x0d] << 8 | edid[0x0e] << 16 | edid[0x0f] << 24;
-
- /* Week and Year */
- is_model_year = FALSE;
- switch (edid[0x10])
- {
- case 0x00:
- info->production_week = -1;
- break;
-
- case 0xff:
- info->production_week = -1;
- is_model_year = TRUE;
- break;
-
- default:
- info->production_week = edid[0x10];
- break;
- }
-
- if (is_model_year)
- {
- info->production_year = -1;
- info->model_year = 1990 + edid[0x11];
- }
- else
- {
- info->production_year = 1990 + edid[0x11];
- info->model_year = -1;
- }
-
- return TRUE;
-}
-
-static int
-decode_edid_version (const uchar *edid, MonitorInfo *info)
-{
- info->major_version = edid[0x12];
- info->minor_version = edid[0x13];
-
- return TRUE;
-}
-
-static int
-decode_display_parameters (const uchar *edid, MonitorInfo *info)
-{
- /* Digital vs Analog */
- info->is_digital = get_bit (edid[0x14], 7);
-
- if (info->is_digital)
- {
- int bits;
-
- static const int bit_depth[8] =
- {
- -1, 6, 8, 10, 12, 14, 16, -1
- };
-
- static const Interface interfaces[6] =
- {
- UNDEFINED, DVI, HDMI_A, HDMI_B, MDDI, DISPLAY_PORT
- };
-
- bits = get_bits (edid[0x14], 4, 6);
- info->connector.digital.bits_per_primary = bit_depth[bits];
-
- bits = get_bits (edid[0x14], 0, 3);
-
- if (bits <= 5)
- info->connector.digital.interface = interfaces[bits];
- else
- info->connector.digital.interface = UNDEFINED;
- }
- else
- {
- int bits = get_bits (edid[0x14], 5, 6);
-
- static const double levels[][3] =
- {
- { 0.7, 0.3, 1.0 },
- { 0.714, 0.286, 1.0 },
- { 1.0, 0.4, 1.4 },
- { 0.7, 0.0, 0.7 },
- };
-
- info->connector.analog.video_signal_level = levels[bits][0];
- info->connector.analog.sync_signal_level = levels[bits][1];
- info->connector.analog.total_signal_level = levels[bits][2];
-
- info->connector.analog.blank_to_black = get_bit (edid[0x14], 4);
-
- info->connector.analog.separate_hv_sync = get_bit (edid[0x14], 3);
- info->connector.analog.composite_sync_on_h = get_bit (edid[0x14], 2);
- info->connector.analog.composite_sync_on_green = get_bit (edid[0x14], 1);
-
- info->connector.analog.serration_on_vsync = get_bit (edid[0x14], 0);
- }
-
- /* Screen Size / Aspect Ratio */
- if (edid[0x15] == 0 && edid[0x16] == 0)
- {
- info->width_mm = -1;
- info->height_mm = -1;
- info->aspect_ratio = -1.0;
- }
- else if (edid[0x16] == 0)
- {
- info->width_mm = -1;
- info->height_mm = -1;
- info->aspect_ratio = 100.0 / (edid[0x15] + 99);
- }
- else if (edid[0x15] == 0)
- {
- info->width_mm = -1;
- info->height_mm = -1;
- info->aspect_ratio = 100.0 / (edid[0x16] + 99);
- info->aspect_ratio = 1/info->aspect_ratio; /* portrait */
- }
- else
- {
- info->width_mm = 10 * edid[0x15];
- info->height_mm = 10 * edid[0x16];
- }
-
- /* Gamma */
- if (edid[0x17] == 0xFF)
- info->gamma = -1.0;
- else
- info->gamma = (edid[0x17] + 100.0) / 100.0;
-
- /* Features */
- info->standby = get_bit (edid[0x18], 7);
- info->suspend = get_bit (edid[0x18], 6);
- info->active_off = get_bit (edid[0x18], 5);
-
- if (info->is_digital)
- {
- info->connector.digital.rgb444 = TRUE;
- if (get_bit (edid[0x18], 3))
- info->connector.digital.ycrcb444 = 1;
- if (get_bit (edid[0x18], 4))
- info->connector.digital.ycrcb422 = 1;
- }
- else
- {
- int bits = get_bits (edid[0x18], 3, 4);
- ColorType color_type[4] =
- {
- MONOCHROME, RGB, OTHER_COLOR, UNDEFINED_COLOR
- };
-
- info->connector.analog.color_type = color_type[bits];
- }
-
- info->srgb_is_standard = get_bit (edid[0x18], 2);
-
- /* In 1.3 this is called "has preferred timing" */
- info->preferred_timing_includes_native = get_bit (edid[0x18], 1);
-
- /* FIXME: In 1.3 this indicates whether the monitor accepts GTF */
- info->continuous_frequency = get_bit (edid[0x18], 0);
- return TRUE;
-}
-
-static double
-decode_fraction (int high, int low)
-{
- double result = 0.0;
- int i;
-
- high = (high << 2) | low;
-
- for (i = 0; i < 10; ++i)
- result += get_bit (high, i) * pow (2, i - 10);
-
- return result;
-}
-
-static int
-decode_color_characteristics (const uchar *edid, MonitorInfo *info)
-{
- info->red_x = decode_fraction (edid[0x1b], get_bits (edid[0x19], 6, 7));
- info->red_y = decode_fraction (edid[0x1c], get_bits (edid[0x19], 5, 4));
- info->green_x = decode_fraction (edid[0x1d], get_bits (edid[0x19], 2, 3));
- info->green_y = decode_fraction (edid[0x1e], get_bits (edid[0x19], 0, 1));
- info->blue_x = decode_fraction (edid[0x1f], get_bits (edid[0x1a], 6, 7));
- info->blue_y = decode_fraction (edid[0x20], get_bits (edid[0x1a], 4, 5));
- info->white_x = decode_fraction (edid[0x21], get_bits (edid[0x1a], 2, 3));
- info->white_y = decode_fraction (edid[0x22], get_bits (edid[0x1a], 0, 1));
-
- return TRUE;
-}
-
-static int
-decode_established_timings (const uchar *edid, MonitorInfo *info)
-{
- static const Timing established[][8] =
- {
- {
- { 800, 600, 60 },
- { 800, 600, 56 },
- { 640, 480, 75 },
- { 640, 480, 72 },
- { 640, 480, 67 },
- { 640, 480, 60 },
- { 720, 400, 88 },
- { 720, 400, 70 }
- },
- {
- { 1280, 1024, 75 },
- { 1024, 768, 75 },
- { 1024, 768, 70 },
- { 1024, 768, 60 },
- { 1024, 768, 87 },
- { 832, 624, 75 },
- { 800, 600, 75 },
- { 800, 600, 72 }
- },
- {
- { 0, 0, 0 },
- { 0, 0, 0 },
- { 0, 0, 0 },
- { 0, 0, 0 },
- { 0, 0, 0 },
- { 0, 0, 0 },
- { 0, 0, 0 },
- { 1152, 870, 75 }
- },
- };
-
- int i, j, idx;
-
- idx = 0;
- for (i = 0; i < 3; ++i)
- {
- for (j = 0; j < 8; ++j)
- {
- int byte = edid[0x23 + i];
-
- if (get_bit (byte, j) && established[i][j].frequency != 0)
- info->established[idx++] = established[i][j];
- }
- }
- return TRUE;
-}
-
-static int
-decode_standard_timings (const uchar *edid, MonitorInfo *info)
-{
- int i;
-
- for (i = 0; i < 8; i++)
- {
- int first = edid[0x26 + 2 * i];
- int second = edid[0x27 + 2 * i];
-
- if (first != 0x01 && second != 0x01)
- {
- int w = 8 * (first + 31);
- int h = 0;
-
- switch (get_bits (second, 6, 7))
- {
- case 0x00: h = (w / 16) * 10; break;
- case 0x01: h = (w / 4) * 3; break;
- case 0x02: h = (w / 5) * 4; break;
- case 0x03: h = (w / 16) * 9; break;
- }
-
- info->standard[i].width = w;
- info->standard[i].height = h;
- info->standard[i].frequency = get_bits (second, 0, 5) + 60;
- }
- }
-
- return TRUE;
-}
-
-static void
-decode_lf_string (const uchar *s, int n_chars, char *result)
-{
- int i;
- for (i = 0; i < n_chars; ++i)
- {
- if (s[i] == 0x0a)
- {
- *result++ = '\0';
- break;
- }
- else if (s[i] == 0x00)
- {
- /* Convert embedded 0's to spaces */
- *result++ = ' ';
- }
- else
- {
- *result++ = s[i];
- }
- }
-}
-
-static void
-decode_display_descriptor (const uchar *desc,
- MonitorInfo *info)
-{
- switch (desc[0x03])
- {
- case 0xFC:
- decode_lf_string (desc + 5, 13, info->dsc_product_name);
- break;
- case 0xFF:
- decode_lf_string (desc + 5, 13, info->dsc_serial_number);
- break;
- case 0xFE:
- decode_lf_string (desc + 5, 13, info->dsc_string);
- break;
- case 0xFD:
- /* Range Limits */
- break;
- case 0xFB:
- /* Color Point */
- break;
- case 0xFA:
- /* Timing Identifications */
- break;
- case 0xF9:
- /* Color Management */
- break;
- case 0xF8:
- /* Timing Codes */
- break;
- case 0xF7:
- /* Established Timings */
- break;
- case 0x10:
- break;
- }
-}
-
-static void
-decode_detailed_timing (const uchar *timing,
- DetailedTiming *detailed)
-{
- int bits;
- StereoType stereo[] =
- {
- NO_STEREO, NO_STEREO, FIELD_RIGHT, FIELD_LEFT,
- TWO_WAY_RIGHT_ON_EVEN, TWO_WAY_LEFT_ON_EVEN,
- FOUR_WAY_INTERLEAVED, SIDE_BY_SIDE
- };
-
- detailed->pixel_clock = (timing[0x00] | timing[0x01] << 8) * 10000;
- detailed->h_addr = timing[0x02] | ((timing[0x04] & 0xf0) << 4);
- detailed->h_blank = timing[0x03] | ((timing[0x04] & 0x0f) << 8);
- detailed->v_addr = timing[0x05] | ((timing[0x07] & 0xf0) << 4);
- detailed->v_blank = timing[0x06] | ((timing[0x07] & 0x0f) << 8);
- detailed->h_front_porch = timing[0x08] | get_bits (timing[0x0b], 6, 7) << 8;
- detailed->h_sync = timing[0x09] | get_bits (timing[0x0b], 4, 5) << 8;
- detailed->v_front_porch =
- get_bits (timing[0x0a], 4, 7) | get_bits (timing[0x0b], 2, 3) << 4;
- detailed->v_sync =
- get_bits (timing[0x0a], 0, 3) | get_bits (timing[0x0b], 0, 1) << 4;
- detailed->width_mm = timing[0x0c] | get_bits (timing[0x0e], 4, 7) << 8;
- detailed->height_mm = timing[0x0d] | get_bits (timing[0x0e], 0, 3) << 8;
- detailed->right_border = timing[0x0f];
- detailed->top_border = timing[0x10];
-
- detailed->interlaced = get_bit (timing[0x11], 7);
-
- /* Stereo */
- bits = get_bits (timing[0x11], 5, 6) << 1 | get_bit (timing[0x11], 0);
- detailed->stereo = stereo[bits];
-
- /* Sync */
- bits = timing[0x11];
-
- detailed->digital_sync = get_bit (bits, 4);
- if (detailed->digital_sync)
- {
- detailed->connector.digital.composite = !get_bit (bits, 3);
-
- if (detailed->connector.digital.composite)
- {
- detailed->connector.digital.serrations = get_bit (bits, 2);
- detailed->connector.digital.negative_vsync = FALSE;
- }
- else
- {
- detailed->connector.digital.serrations = FALSE;
- detailed->connector.digital.negative_vsync = !get_bit (bits, 2);
- }
-
- detailed->connector.digital.negative_hsync = !get_bit (bits, 0);
- }
- else
- {
- detailed->connector.analog.bipolar = get_bit (bits, 3);
- detailed->connector.analog.serrations = get_bit (bits, 2);
- detailed->connector.analog.sync_on_green = !get_bit (bits, 1);
- }
-}
-
-static int
-decode_descriptors (const uchar *edid, MonitorInfo *info)
-{
- int i;
- int timing_idx;
-
- timing_idx = 0;
-
- for (i = 0; i < 4; ++i)
- {
- int index = 0x36 + i * 18;
-
- if (edid[index + 0] == 0x00 && edid[index + 1] == 0x00)
- {
- decode_display_descriptor (edid + index, info);
- }
- else
- {
- decode_detailed_timing (edid + index, &(info->detailed_timings[timing_idx++]));
- }
- }
-
- info->n_detailed_timings = timing_idx;
-
- return TRUE;
-}
-
-static void
-decode_check_sum (const uchar *edid,
- MonitorInfo *info)
-{
- int i;
- uchar check = 0;
-
- for (i = 0; i < 128; ++i)
- check += edid[i];
-
- info->checksum = check;
-}
-
-MonitorInfo *
-decode_edid (const uchar *edid)
-{
- MonitorInfo *info = g_new0 (MonitorInfo, 1);
-
- decode_check_sum (edid, info);
-
- if (decode_header (edid)
- && decode_vendor_and_product_identification (edid, info)
- && decode_edid_version (edid, info)
- && decode_display_parameters (edid, info)
- && decode_color_characteristics (edid, info)
- && decode_established_timings (edid, info)
- && decode_standard_timings (edid, info)
- && decode_descriptors (edid, info))
- {
- return info;
- }
- else
- {
- g_free (info);
- return NULL;
- }
-}
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