Merge tag 'v3.14-rc6' into drm-intel-next-queued
[deliverable/linux.git] / drivers / gpu / drm / i915 / i915_params.c
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 .enable_pc8 = 1,
46 .pc8_timeout = 5000,
47 .prefault_disable = 0,
48 .reset = true,
49 .invert_brightness = 0,
50 .disable_display = 0,
51 .enable_cmd_parser = 0,
52 };
53
54 module_param_named(modeset, i915.modeset, int, 0400);
55 MODULE_PARM_DESC(modeset,
56 "Use kernel modesetting [KMS] (0=DRM_I915_KMS from .config, "
57 "1=on, -1=force vga console preference [default])");
58
59 module_param_named(panel_ignore_lid, i915.panel_ignore_lid, int, 0600);
60 MODULE_PARM_DESC(panel_ignore_lid,
61 "Override lid status (0=autodetect, 1=autodetect disabled [default], "
62 "-1=force lid closed, -2=force lid open)");
63
64 module_param_named(powersave, i915.powersave, int, 0600);
65 MODULE_PARM_DESC(powersave,
66 "Enable powersavings, fbc, downclocking, etc. (default: true)");
67
68 module_param_named(semaphores, i915.semaphores, int, 0400);
69 MODULE_PARM_DESC(semaphores,
70 "Use semaphores for inter-ring sync "
71 "(default: -1 (use per-chip defaults))");
72
73 module_param_named(enable_rc6, i915.enable_rc6, int, 0400);
74 MODULE_PARM_DESC(enable_rc6,
75 "Enable power-saving render C-state 6. "
76 "Different stages can be selected via bitmask values "
77 "(0 = disable; 1 = enable rc6; 2 = enable deep rc6; 4 = enable deepest rc6). "
78 "For example, 3 would enable rc6 and deep rc6, and 7 would enable everything. "
79 "default: -1 (use per-chip default)");
80
81 module_param_named(enable_fbc, i915.enable_fbc, int, 0600);
82 MODULE_PARM_DESC(enable_fbc,
83 "Enable frame buffer compression for power savings "
84 "(default: -1 (use per-chip default))");
85
86 module_param_named(lvds_downclock, i915.lvds_downclock, int, 0400);
87 MODULE_PARM_DESC(lvds_downclock,
88 "Use panel (LVDS/eDP) downclocking for power savings "
89 "(default: false)");
90
91 module_param_named(lvds_channel_mode, i915.lvds_channel_mode, int, 0600);
92 MODULE_PARM_DESC(lvds_channel_mode,
93 "Specify LVDS channel mode "
94 "(0=probe BIOS [default], 1=single-channel, 2=dual-channel)");
95
96 module_param_named(lvds_use_ssc, i915.panel_use_ssc, int, 0600);
97 MODULE_PARM_DESC(lvds_use_ssc,
98 "Use Spread Spectrum Clock with panels [LVDS/eDP] "
99 "(default: auto from VBT)");
100
101 module_param_named(vbt_sdvo_panel_type, i915.vbt_sdvo_panel_type, int, 0600);
102 MODULE_PARM_DESC(vbt_sdvo_panel_type,
103 "Override/Ignore selection of SDVO panel mode in the VBT "
104 "(-2=ignore, -1=auto [default], index in VBT BIOS table)");
105
106 module_param_named(reset, i915.reset, bool, 0600);
107 MODULE_PARM_DESC(reset, "Attempt GPU resets (default: true)");
108
109 module_param_named(enable_hangcheck, i915.enable_hangcheck, bool, 0644);
110 MODULE_PARM_DESC(enable_hangcheck,
111 "Periodically check GPU activity for detecting hangs. "
112 "WARNING: Disabling this can cause system wide hangs. "
113 "(default: true)");
114
115 module_param_named(enable_ppgtt, i915.enable_ppgtt, int, 0400);
116 MODULE_PARM_DESC(enable_ppgtt,
117 "Override PPGTT usage. "
118 "(-1=auto [default], 0=disabled, 1=aliasing, 2=full)");
119
120 module_param_named(enable_psr, i915.enable_psr, int, 0600);
121 MODULE_PARM_DESC(enable_psr, "Enable PSR (default: false)");
122
123 module_param_named(preliminary_hw_support, i915.preliminary_hw_support, int, 0600);
124 MODULE_PARM_DESC(preliminary_hw_support,
125 "Enable preliminary hardware support.");
126
127 module_param_named(disable_power_well, i915.disable_power_well, int, 0600);
128 MODULE_PARM_DESC(disable_power_well,
129 "Disable the power well when possible (default: true)");
130
131 module_param_named(enable_ips, i915.enable_ips, int, 0600);
132 MODULE_PARM_DESC(enable_ips, "Enable IPS (default: true)");
133
134 module_param_named(fastboot, i915.fastboot, bool, 0600);
135 MODULE_PARM_DESC(fastboot,
136 "Try to skip unnecessary mode sets at boot time (default: false)");
137
138 module_param_named(enable_pc8, i915.enable_pc8, int, 0600);
139 MODULE_PARM_DESC(enable_pc8,
140 "Enable support for low power package C states (PC8+) (default: true)");
141
142 module_param_named(pc8_timeout, i915.pc8_timeout, int, 0600);
143 MODULE_PARM_DESC(pc8_timeout,
144 "Number of msecs of idleness required to enter PC8+ (default: 5000)");
145
146 module_param_named(prefault_disable, i915.prefault_disable, bool, 0600);
147 MODULE_PARM_DESC(prefault_disable,
148 "Disable page prefaulting for pread/pwrite/reloc (default:false). "
149 "For developers only.");
150
151 module_param_named(invert_brightness, i915.invert_brightness, int, 0600);
152 MODULE_PARM_DESC(invert_brightness,
153 "Invert backlight brightness "
154 "(-1 force normal, 0 machine defaults, 1 force inversion), please "
155 "report PCI device ID, subsystem vendor and subsystem device ID "
156 "to dri-devel@lists.freedesktop.org, if your machine needs it. "
157 "It will then be included in an upcoming module version.");
158
159 module_param_named(disable_display, i915.disable_display, bool, 0600);
160 MODULE_PARM_DESC(disable_display, "Disable display (default: false)");
161
162 module_param_named(enable_cmd_parser, i915.enable_cmd_parser, int, 0600);
163 MODULE_PARM_DESC(enable_cmd_parser,
164 "Enable command parsing (1=enabled, 0=disabled [default])");
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