1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
|
/*-
* Copyright (c) 2022 Beckhoff Automation GmbH & Co. KG
*
* 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.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``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 THE AUTHOR OR CONTRIBUTORS 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/param.h>
#include <sys/systm.h>
#include <video/cmdline.h>
const char *
video_get_options(const char *connector_name)
{
char tunable[64];
const char *options;
/*
* A user may use loader tunables to set a specific mode for the
* console. Tunables are read in the following order:
* 1. kern.vt.fb.modes.$connector_name
* 2. kern.vt.fb.default_mode
*
* Example of a mode specific to the LVDS connector:
* kern.vt.fb.modes.LVDS="1024x768"
*
* Example of a mode applied to all connectors not having a
* connector-specific mode:
* kern.vt.fb.default_mode="640x480"
*/
snprintf(tunable, sizeof(tunable), "kern.vt.fb.modes.%s",
connector_name);
if (bootverbose) {
printf("[drm] Connector %s: get mode from tunables:\n", connector_name);
printf("[drm] - %s\n", tunable);
printf("[drm] - kern.vt.fb.default_mode\n");
}
options = kern_getenv(tunable);
if (options == NULL)
options = kern_getenv("kern.vt.fb.default_mode");
return (options);
}
|
