xref: /openbmc/linux/drivers/gpu/drm/i915/i915_params.c (revision d2999e1b)
1 /*
2  * Copyright © 2014 Intel Corporation
3  *
4  * Permission is hereby granted, free of charge, to any person obtaining a
5  * copy of this software and associated documentation files (the
6  * "Software"), to deal in the Software without restriction, including
7  * without limitation the rights to use, copy, modify, merge, publish,
8  * distribute, sub license, and/or sell copies of the Software, and to
9  * permit persons to whom the Software is furnished to do so, subject to
10  * the following conditions:
11  *
12  * The above copyright notice and this permission notice (including the
13  * next paragraph) shall be included in all copies or substantial portions
14  * of the Software.
15  *
16  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
17  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
19  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
20  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
21  * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
22  * IN THE SOFTWARE.
23  */
24 
25 #include "i915_drv.h"
26 
27 struct i915_params i915 __read_mostly = {
28 	.modeset = -1,
29 	.panel_ignore_lid = 1,
30 	.powersave = 1,
31 	.semaphores = -1,
32 	.lvds_downclock = 0,
33 	.lvds_channel_mode = 0,
34 	.panel_use_ssc = -1,
35 	.vbt_sdvo_panel_type = -1,
36 	.enable_rc6 = -1,
37 	.enable_fbc = -1,
38 	.enable_hangcheck = true,
39 	.enable_ppgtt = -1,
40 	.enable_psr = 0,
41 	.preliminary_hw_support = IS_ENABLED(CONFIG_DRM_I915_PRELIMINARY_HW_SUPPORT),
42 	.disable_power_well = 1,
43 	.enable_ips = 1,
44 	.fastboot = 0,
45 	.prefault_disable = 0,
46 	.reset = true,
47 	.invert_brightness = 0,
48 	.disable_display = 0,
49 	.enable_cmd_parser = 1,
50 	.disable_vtd_wa = 0,
51 };
52 
53 module_param_named(modeset, i915.modeset, int, 0400);
54 MODULE_PARM_DESC(modeset,
55 	"Use kernel modesetting [KMS] (0=DRM_I915_KMS from .config, "
56 	"1=on, -1=force vga console preference [default])");
57 
58 module_param_named(panel_ignore_lid, i915.panel_ignore_lid, int, 0600);
59 MODULE_PARM_DESC(panel_ignore_lid,
60 	"Override lid status (0=autodetect, 1=autodetect disabled [default], "
61 	"-1=force lid closed, -2=force lid open)");
62 
63 module_param_named(powersave, i915.powersave, int, 0600);
64 MODULE_PARM_DESC(powersave,
65 	"Enable powersavings, fbc, downclocking, etc. (default: true)");
66 
67 module_param_named(semaphores, i915.semaphores, int, 0400);
68 MODULE_PARM_DESC(semaphores,
69 	"Use semaphores for inter-ring sync "
70 	"(default: -1 (use per-chip defaults))");
71 
72 module_param_named(enable_rc6, i915.enable_rc6, int, 0400);
73 MODULE_PARM_DESC(enable_rc6,
74 	"Enable power-saving render C-state 6. "
75 	"Different stages can be selected via bitmask values "
76 	"(0 = disable; 1 = enable rc6; 2 = enable deep rc6; 4 = enable deepest rc6). "
77 	"For example, 3 would enable rc6 and deep rc6, and 7 would enable everything. "
78 	"default: -1 (use per-chip default)");
79 
80 module_param_named(enable_fbc, i915.enable_fbc, int, 0600);
81 MODULE_PARM_DESC(enable_fbc,
82 	"Enable frame buffer compression for power savings "
83 	"(default: -1 (use per-chip default))");
84 
85 module_param_named(lvds_downclock, i915.lvds_downclock, int, 0400);
86 MODULE_PARM_DESC(lvds_downclock,
87 	"Use panel (LVDS/eDP) downclocking for power savings "
88 	"(default: false)");
89 
90 module_param_named(lvds_channel_mode, i915.lvds_channel_mode, int, 0600);
91 MODULE_PARM_DESC(lvds_channel_mode,
92 	 "Specify LVDS channel mode "
93 	 "(0=probe BIOS [default], 1=single-channel, 2=dual-channel)");
94 
95 module_param_named(lvds_use_ssc, i915.panel_use_ssc, int, 0600);
96 MODULE_PARM_DESC(lvds_use_ssc,
97 	"Use Spread Spectrum Clock with panels [LVDS/eDP] "
98 	"(default: auto from VBT)");
99 
100 module_param_named(vbt_sdvo_panel_type, i915.vbt_sdvo_panel_type, int, 0600);
101 MODULE_PARM_DESC(vbt_sdvo_panel_type,
102 	"Override/Ignore selection of SDVO panel mode in the VBT "
103 	"(-2=ignore, -1=auto [default], index in VBT BIOS table)");
104 
105 module_param_named(reset, i915.reset, bool, 0600);
106 MODULE_PARM_DESC(reset, "Attempt GPU resets (default: true)");
107 
108 module_param_named(enable_hangcheck, i915.enable_hangcheck, bool, 0644);
109 MODULE_PARM_DESC(enable_hangcheck,
110 	"Periodically check GPU activity for detecting hangs. "
111 	"WARNING: Disabling this can cause system wide hangs. "
112 	"(default: true)");
113 
114 module_param_named(enable_ppgtt, i915.enable_ppgtt, int, 0400);
115 MODULE_PARM_DESC(enable_ppgtt,
116 	"Override PPGTT usage. "
117 	"(-1=auto [default], 0=disabled, 1=aliasing, 2=full)");
118 
119 module_param_named(enable_psr, i915.enable_psr, int, 0600);
120 MODULE_PARM_DESC(enable_psr, "Enable PSR (default: false)");
121 
122 module_param_named(preliminary_hw_support, i915.preliminary_hw_support, int, 0600);
123 MODULE_PARM_DESC(preliminary_hw_support,
124 	"Enable preliminary hardware support.");
125 
126 module_param_named(disable_power_well, i915.disable_power_well, int, 0600);
127 MODULE_PARM_DESC(disable_power_well,
128 	"Disable the power well when possible (default: true)");
129 
130 module_param_named(enable_ips, i915.enable_ips, int, 0600);
131 MODULE_PARM_DESC(enable_ips, "Enable IPS (default: true)");
132 
133 module_param_named(fastboot, i915.fastboot, bool, 0600);
134 MODULE_PARM_DESC(fastboot,
135 	"Try to skip unnecessary mode sets at boot time (default: false)");
136 
137 module_param_named(prefault_disable, i915.prefault_disable, bool, 0600);
138 MODULE_PARM_DESC(prefault_disable,
139 	"Disable page prefaulting for pread/pwrite/reloc (default:false). "
140 	"For developers only.");
141 
142 module_param_named(invert_brightness, i915.invert_brightness, int, 0600);
143 MODULE_PARM_DESC(invert_brightness,
144 	"Invert backlight brightness "
145 	"(-1 force normal, 0 machine defaults, 1 force inversion), please "
146 	"report PCI device ID, subsystem vendor and subsystem device ID "
147 	"to dri-devel@lists.freedesktop.org, if your machine needs it. "
148 	"It will then be included in an upcoming module version.");
149 
150 module_param_named(disable_display, i915.disable_display, bool, 0600);
151 MODULE_PARM_DESC(disable_display, "Disable display (default: false)");
152 
153 module_param_named(disable_vtd_wa, i915.disable_vtd_wa, bool, 0600);
154 MODULE_PARM_DESC(disable_vtd_wa, "Disable all VT-d workarounds (default: false)");
155 
156 module_param_named(enable_cmd_parser, i915.enable_cmd_parser, int, 0600);
157 MODULE_PARM_DESC(enable_cmd_parser,
158 		 "Enable command parsing (1=enabled [default], 0=disabled)");
159