[mutter] MonitorXrandr: implement correct EDID parsing
- From: Giovanni Campagna <gcampagna src gnome org>
- To: commits-list gnome org
- Cc:
- Subject: [mutter] MonitorXrandr: implement correct EDID parsing
- Date: Sat, 17 Aug 2013 22:54:46 +0000 (UTC)
commit 69467842abe72c4bd253daf5ce0a7215f93293c4
Author: Giovanni Campagna <gcampagn redhat com>
Date: Fri Aug 16 17:06:46 2013 +0200
MonitorXrandr: implement correct EDID parsing
To provide valid values for the vendor, product and serial fields
we need to read the EDID and parse it.
Parser kindly provided by gnome-desktop.
https://bugzilla.gnome.org/show_bug.cgi?id=705670
src/Makefile.am | 2 +
src/core/edid-parse.c | 539 +++++++++++++++++++++++++++++++++++++++++++++
src/core/edid.h | 195 ++++++++++++++++
src/core/monitor-xrandr.c | 163 +++++++++------
4 files changed, 835 insertions(+), 64 deletions(-)
---
diff --git a/src/Makefile.am b/src/Makefile.am
index 5d12615..6d40300 100644
--- a/src/Makefile.am
+++ b/src/Makefile.am
@@ -95,6 +95,8 @@ libmutter_la_SOURCES = \
ui/draw-workspace.h \
core/edge-resistance.c \
core/edge-resistance.h \
+ core/edid-parse.c \
+ core/edid.h \
core/errors.c \
meta/errors.h \
core/frame.c \
diff --git a/src/core/edid-parse.c b/src/core/edid-parse.c
new file mode 100644
index 0000000..5b3283a
--- /dev/null
+++ b/src/core/edid-parse.c
@@ -0,0 +1,539 @@
+/*
+ * 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 "edid.h"
+#include <stdlib.h>
+#include <string.h>
+#include <math.h>
+#include <glib.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;
+ }
+}
diff --git a/src/core/edid.h b/src/core/edid.h
new file mode 100644
index 0000000..703c639
--- /dev/null
+++ b/src/core/edid.h
@@ -0,0 +1,195 @@
+/* edid.h
+ *
+ * Copyright 2007, 2008, Red Hat, Inc.
+ *
+ * This file is part of the Gnome Library.
+ *
+ * The Gnome Library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Library General Public License as
+ * published by the Free Software Foundation; either version 2 of the
+ * License, or (at your option) any later version.
+ *
+ * The Gnome Library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Library General Public License for more details.
+ *
+ * You should have received a copy of the GNU Library General Public
+ * License along with the Gnome Library; see the file COPYING.LIB. If not,
+ * write to the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
+ * Boston, MA 02110-1301, USA.
+ *
+ * Author: Soren Sandmann <sandmann redhat com>
+ */
+
+#ifndef EDID_H
+#define EDID_H
+
+typedef unsigned char uchar;
+typedef struct MonitorInfo MonitorInfo;
+typedef struct Timing Timing;
+typedef struct DetailedTiming DetailedTiming;
+
+typedef enum
+{
+ UNDEFINED,
+ DVI,
+ HDMI_A,
+ HDMI_B,
+ MDDI,
+ DISPLAY_PORT
+} Interface;
+
+typedef enum
+{
+ UNDEFINED_COLOR,
+ MONOCHROME,
+ RGB,
+ OTHER_COLOR
+} ColorType;
+
+typedef enum
+{
+ NO_STEREO,
+ FIELD_RIGHT,
+ FIELD_LEFT,
+ TWO_WAY_RIGHT_ON_EVEN,
+ TWO_WAY_LEFT_ON_EVEN,
+ FOUR_WAY_INTERLEAVED,
+ SIDE_BY_SIDE
+} StereoType;
+
+struct Timing
+{
+ int width;
+ int height;
+ int frequency;
+};
+
+struct DetailedTiming
+{
+ int pixel_clock;
+ int h_addr;
+ int h_blank;
+ int h_sync;
+ int h_front_porch;
+ int v_addr;
+ int v_blank;
+ int v_sync;
+ int v_front_porch;
+ int width_mm;
+ int height_mm;
+ int right_border;
+ int top_border;
+ int interlaced;
+ StereoType stereo;
+
+ int digital_sync;
+ union
+ {
+ struct
+ {
+ int bipolar;
+ int serrations;
+ int sync_on_green;
+ } analog;
+
+ struct
+ {
+ int composite;
+ int serrations;
+ int negative_vsync;
+ int negative_hsync;
+ } digital;
+ } connector;
+};
+
+struct MonitorInfo
+{
+ int checksum;
+ char manufacturer_code[4];
+ int product_code;
+ unsigned int serial_number;
+
+ int production_week; /* -1 if not specified */
+ int production_year; /* -1 if not specified */
+ int model_year; /* -1 if not specified */
+
+ int major_version;
+ int minor_version;
+
+ int is_digital;
+
+ union
+ {
+ struct
+ {
+ int bits_per_primary;
+ Interface interface;
+ int rgb444;
+ int ycrcb444;
+ int ycrcb422;
+ } digital;
+
+ struct
+ {
+ double video_signal_level;
+ double sync_signal_level;
+ double total_signal_level;
+
+ int blank_to_black;
+
+ int separate_hv_sync;
+ int composite_sync_on_h;
+ int composite_sync_on_green;
+ int serration_on_vsync;
+ ColorType color_type;
+ } analog;
+ } connector;
+
+ int width_mm; /* -1 if not specified */
+ int height_mm; /* -1 if not specified */
+ double aspect_ratio; /* -1.0 if not specififed */
+
+ double gamma; /* -1.0 if not specified */
+
+ int standby;
+ int suspend;
+ int active_off;
+
+ int srgb_is_standard;
+ int preferred_timing_includes_native;
+ int continuous_frequency;
+
+ double red_x;
+ double red_y;
+ double green_x;
+ double green_y;
+ double blue_x;
+ double blue_y;
+ double white_x;
+ double white_y;
+
+ Timing established[24]; /* Terminated by 0x0x0 */
+ Timing standard[8];
+
+ int n_detailed_timings;
+ DetailedTiming detailed_timings[4]; /* If monitor has a preferred
+ * mode, it is the first one
+ * (whether it has, is
+ * determined by the
+ * preferred_timing_includes
+ * bit.
+ */
+
+ /* Optional product description */
+ char dsc_serial_number[14];
+ char dsc_product_name[14];
+ char dsc_string[14]; /* Unspecified ASCII data */
+};
+
+MonitorInfo *decode_edid (const uchar *data);
+char *make_display_name (const MonitorInfo *info);
+char *make_display_size_string (int width_mm, int height_mm);
+
+#endif
diff --git a/src/core/monitor-xrandr.c b/src/core/monitor-xrandr.c
index e8cc6e9..c8e189e 100644
--- a/src/core/monitor-xrandr.c
+++ b/src/core/monitor-xrandr.c
@@ -40,6 +40,8 @@
#include <meta/errors.h>
#include "monitor-private.h"
+#include "edid.h"
+
#define ALL_WL_TRANSFORMS ((1 << (WL_OUTPUT_TRANSFORM_FLIPPED_270 + 1)) - 1)
struct _MetaMonitorManagerXrandr
@@ -236,6 +238,74 @@ compare_outputs (const void *one,
return strcmp (o_one->name, o_two->name);
}
+static guint8 *
+get_edid_property (Display *dpy,
+ RROutput output,
+ Atom atom,
+ gsize *len)
+{
+ unsigned char *prop;
+ int actual_format;
+ unsigned long nitems, bytes_after;
+ Atom actual_type;
+ guint8 *result;
+
+ XRRGetOutputProperty (dpy, output, atom,
+ 0, 100, False, False,
+ AnyPropertyType,
+ &actual_type, &actual_format,
+ &nitems, &bytes_after, &prop);
+
+ if (actual_type == XA_INTEGER && actual_format == 8)
+ {
+ result = g_memdup (prop, nitems);
+ if (len)
+ *len = nitems;
+ }
+ else
+ {
+ result = NULL;
+ }
+
+ XFree (prop);
+
+ return result;
+}
+
+static GBytes *
+read_output_edid (MetaMonitorManagerXrandr *manager_xrandr,
+ XID output_id)
+{
+ Atom edid_atom;
+ guint8 *result;
+ gsize len;
+
+ edid_atom = XInternAtom (manager_xrandr->xdisplay, "EDID", FALSE);
+ result = get_edid_property (manager_xrandr->xdisplay, output_id, edid_atom, &len);
+
+ if (!result)
+ {
+ edid_atom = XInternAtom (manager_xrandr->xdisplay, "EDID_DATA", FALSE);
+ result = get_edid_property (manager_xrandr->xdisplay, output_id, edid_atom, &len);
+ }
+
+ if (!result)
+ {
+ edid_atom = XInternAtom (manager_xrandr->xdisplay, "XFree86_DDC_EDID1_RAWDATA", FALSE);
+ result = get_edid_property (manager_xrandr->xdisplay, output_id, edid_atom, &len);
+ }
+
+ if (result)
+ {
+ if (len > 0 && len % 128 == 0)
+ return g_bytes_new_take (result, len);
+ else
+ g_free (result);
+ }
+
+ return NULL;
+}
+
static void
meta_monitor_manager_xrandr_read_current (MetaMonitorManager *manager)
{
@@ -365,11 +435,36 @@ meta_monitor_manager_xrandr_read_current (MetaMonitorManager *manager)
if (output->connection != RR_Disconnected)
{
+ GBytes *edid;
+ MonitorInfo *parsed_edid;
+
meta_output->output_id = resources->outputs[i];
meta_output->name = g_strdup (output->name);
- meta_output->vendor = g_strdup ("unknown");
- meta_output->product = g_strdup ("unknown");
- meta_output->serial = g_strdup ("");
+
+ edid = read_output_edid (manager_xrandr, meta_output->output_id);
+ if (edid)
+ {
+ gsize len;
+
+ parsed_edid = decode_edid (g_bytes_get_data (edid, &len));
+ if (parsed_edid)
+ {
+ meta_output->vendor = g_strndup (parsed_edid->manufacturer_code, 4);
+ meta_output->product = g_strndup (parsed_edid->dsc_product_name, 14);
+ meta_output->serial = g_strndup (parsed_edid->dsc_serial_number, 14);
+
+ g_free (parsed_edid);
+ }
+
+ g_bytes_unref (edid);
+ }
+
+ if (!meta_output->vendor)
+ {
+ meta_output->vendor = g_strdup ("unknown");
+ meta_output->product = g_strdup ("unknown");
+ meta_output->serial = g_strdup ("unknown");
+ }
meta_output->width_mm = output->mm_width;
meta_output->height_mm = output->mm_height;
meta_output->subpixel_order = COGL_SUBPIXEL_ORDER_UNKNOWN;
@@ -467,73 +562,13 @@ meta_monitor_manager_xrandr_read_current (MetaMonitorManager *manager)
}
}
-static guint8 *
-get_edid_property (Display *dpy,
- RROutput output,
- Atom atom,
- gsize *len)
-{
- unsigned char *prop;
- int actual_format;
- unsigned long nitems, bytes_after;
- Atom actual_type;
- guint8 *result;
-
- XRRGetOutputProperty (dpy, output, atom,
- 0, 100, False, False,
- AnyPropertyType,
- &actual_type, &actual_format,
- &nitems, &bytes_after, &prop);
-
- if (actual_type == XA_INTEGER && actual_format == 8)
- {
- result = g_memdup (prop, nitems);
- if (len)
- *len = nitems;
- }
- else
- {
- result = NULL;
- }
-
- XFree (prop);
-
- return result;
-}
-
static GBytes *
meta_monitor_manager_xrandr_read_edid (MetaMonitorManager *manager,
MetaOutput *output)
{
MetaMonitorManagerXrandr *manager_xrandr = META_MONITOR_MANAGER_XRANDR (manager);
- Atom edid_atom;
- guint8 *result;
- gsize len;
-
- edid_atom = XInternAtom (manager_xrandr->xdisplay, "EDID", FALSE);
- result = get_edid_property (manager_xrandr->xdisplay, output->output_id, edid_atom, &len);
- if (!result)
- {
- edid_atom = XInternAtom (manager_xrandr->xdisplay, "EDID_DATA", FALSE);
- result = get_edid_property (manager_xrandr->xdisplay, output->output_id, edid_atom, &len);
- }
-
- if (!result)
- {
- edid_atom = XInternAtom (manager_xrandr->xdisplay, "XFree86_DDC_EDID1_RAWDATA", FALSE);
- result = get_edid_property (manager_xrandr->xdisplay, output->output_id, edid_atom, &len);
- }
-
- if (result)
- {
- if (len > 0 && len % 128 == 0)
- return g_bytes_new_take (result, len);
- else
- g_free (result);
- }
-
- return NULL;
+ return read_output_edid (manager_xrandr, output->output_id);
}
static void
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