ddcProperty.c revision 35c4bbdf 
1/*
2 * Copyright 2006 Luc Verhaegen.
3 *
4 * Permission is hereby granted, free of charge, to any person obtaining a
5 * copy of this software and associated documentation files (the "Software"),
6 * to deal in the Software without restriction, including without limitation
7 * the rights to use, copy, modify, merge, publish, distribute, sub license,
8 * and/or sell copies of the Software, and to permit persons to whom the
9 * Software is furnished to do so, subject to the following conditions:
10 *
11 * The above copyright notice and this permission notice (including the
12 * next paragraph) shall be included in all copies or substantial portions
13 * of the Software.
14 *
15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
16 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
17 * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
18 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
19 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
20 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
21 * DEALINGS IN THE SOFTWARE.
22 */
23
24#ifdef HAVE_XORG_CONFIG_H
25#include <xorg-config.h>
26#endif
27
28#include "xf86.h"
29#include "xf86DDC.h"
30#include <X11/Xatom.h>
31#include "property.h"
32#include "propertyst.h"
33#include <string.h>
34
35#define EDID1_ATOM_NAME         "XFree86_DDC_EDID1_RAWDATA"
36
37static void
38edidMakeAtom(int i, const char *name, CARD8 *data, int size)
39{
40    Atom atom;
41    unsigned char *atom_data;
42
43    if (!(atom_data = malloc(size * sizeof(CARD8))))
44        return;
45
46    atom = MakeAtom(name, strlen(name), TRUE);
47    memcpy(atom_data, data, size);
48    xf86RegisterRootWindowProperty(i, atom, XA_INTEGER, 8, size, atom_data);
49}
50
51static void
52addRootWindowProperties(ScrnInfoPtr pScrn, xf86MonPtr DDC)
53{
54    int scrnIndex = pScrn->scrnIndex;
55
56    if (DDC->flags & MONITOR_DISPLAYID) {
57        /* Don't bother, use RANDR already */
58        return;
59    }
60    else if (DDC->ver.version == 1) {
61        int size = 128 +
62            (DDC->flags & EDID_COMPLETE_RAWDATA ? DDC->no_sections * 128 : 0);
63
64        edidMakeAtom(scrnIndex, EDID1_ATOM_NAME, DDC->rawData, size);
65    }
66    else {
67        xf86DrvMsg(scrnIndex, X_PROBED, "unexpected EDID version %d.%d\n",
68                   DDC->ver.version, DDC->ver.revision);
69        return;
70    }
71}
72
73Bool
74xf86SetDDCproperties(ScrnInfoPtr pScrn, xf86MonPtr DDC)
75{
76    if (!pScrn || !pScrn->monitor || !DDC)
77        return FALSE;
78
79    if (DDC->flags & MONITOR_DISPLAYID);
80    else
81        xf86EdidMonitorSet(pScrn->scrnIndex, pScrn->monitor, DDC);
82
83    addRootWindowProperties(pScrn, DDC);
84
85    return TRUE;
86}
87