2 * Copyright © 2014 Intel Corporation
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5 * copy of this software and associated documentation files (the
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9 * permit persons to whom the Software is furnished to do so, subject to
10 * the following conditions:
12 * The above copyright notice and this permission notice (including the
13 * next paragraph) shall be included in all copies or substantial portions
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
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20 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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27 struct i915_params i915 __read_mostly
= {
29 .panel_ignore_lid
= 1,
33 .lvds_channel_mode
= 0,
35 .vbt_sdvo_panel_type
= -1,
38 .enable_hangcheck
= true,
41 .preliminary_hw_support
= IS_ENABLED(CONFIG_DRM_I915_PRELIMINARY_HW_SUPPORT
),
42 .disable_power_well
= 1,
47 .prefault_disable
= 0,
49 .invert_brightness
= 0,
52 module_param_named(modeset
, i915
.modeset
, int, 0400);
53 MODULE_PARM_DESC(modeset
,
54 "Use kernel modesetting [KMS] (0=DRM_I915_KMS from .config, "
55 "1=on, -1=force vga console preference [default])");
57 module_param_named(panel_ignore_lid
, i915
.panel_ignore_lid
, int, 0600);
58 MODULE_PARM_DESC(panel_ignore_lid
,
59 "Override lid status (0=autodetect, 1=autodetect disabled [default], "
60 "-1=force lid closed, -2=force lid open)");
62 module_param_named(powersave
, i915
.powersave
, int, 0600);
63 MODULE_PARM_DESC(powersave
,
64 "Enable powersavings, fbc, downclocking, etc. (default: true)");
66 module_param_named(semaphores
, i915
.semaphores
, int, 0400);
67 MODULE_PARM_DESC(semaphores
,
68 "Use semaphores for inter-ring sync "
69 "(default: -1 (use per-chip defaults))");
71 module_param_named(i915_enable_rc6
, i915
.enable_rc6
, int, 0400);
72 MODULE_PARM_DESC(i915_enable_rc6
,
73 "Enable power-saving render C-state 6. "
74 "Different stages can be selected via bitmask values "
75 "(0 = disable; 1 = enable rc6; 2 = enable deep rc6; 4 = enable deepest rc6). "
76 "For example, 3 would enable rc6 and deep rc6, and 7 would enable everything. "
77 "default: -1 (use per-chip default)");
79 module_param_named(i915_enable_fbc
, i915
.enable_fbc
, int, 0600);
80 MODULE_PARM_DESC(i915_enable_fbc
,
81 "Enable frame buffer compression for power savings "
82 "(default: -1 (use per-chip default))");
84 module_param_named(lvds_downclock
, i915
.lvds_downclock
, int, 0400);
85 MODULE_PARM_DESC(lvds_downclock
,
86 "Use panel (LVDS/eDP) downclocking for power savings "
89 module_param_named(lvds_channel_mode
, i915
.lvds_channel_mode
, int, 0600);
90 MODULE_PARM_DESC(lvds_channel_mode
,
91 "Specify LVDS channel mode "
92 "(0=probe BIOS [default], 1=single-channel, 2=dual-channel)");
94 module_param_named(lvds_use_ssc
, i915
.panel_use_ssc
, int, 0600);
95 MODULE_PARM_DESC(lvds_use_ssc
,
96 "Use Spread Spectrum Clock with panels [LVDS/eDP] "
97 "(default: auto from VBT)");
99 module_param_named(vbt_sdvo_panel_type
, i915
.vbt_sdvo_panel_type
, int, 0600);
100 MODULE_PARM_DESC(vbt_sdvo_panel_type
,
101 "Override/Ignore selection of SDVO panel mode in the VBT "
102 "(-2=ignore, -1=auto [default], index in VBT BIOS table)");
104 module_param_named(reset
, i915
.reset
, bool, 0600);
105 MODULE_PARM_DESC(reset
, "Attempt GPU resets (default: true)");
107 module_param_named(enable_hangcheck
, i915
.enable_hangcheck
, bool, 0644);
108 MODULE_PARM_DESC(enable_hangcheck
,
109 "Periodically check GPU activity for detecting hangs. "
110 "WARNING: Disabling this can cause system wide hangs. "
113 module_param_named(i915_enable_ppgtt
, i915
.enable_ppgtt
, int, 0400);
114 MODULE_PARM_DESC(i915_enable_ppgtt
,
115 "Override PPGTT usage. "
116 "(-1=auto [default], 0=disabled, 1=aliasing, 2=full)");
118 module_param_named(enable_psr
, i915
.enable_psr
, int, 0600);
119 MODULE_PARM_DESC(enable_psr
, "Enable PSR (default: false)");
121 module_param_named(preliminary_hw_support
, i915
.preliminary_hw_support
, int, 0600);
122 MODULE_PARM_DESC(preliminary_hw_support
,
123 "Enable preliminary hardware support.");
125 module_param_named(disable_power_well
, i915
.disable_power_well
, int, 0600);
126 MODULE_PARM_DESC(disable_power_well
,
127 "Disable the power well when possible (default: true)");
129 module_param_named(enable_ips
, i915
.enable_ips
, int, 0600);
130 MODULE_PARM_DESC(enable_ips
, "Enable IPS (default: true)");
132 module_param_named(fastboot
, i915
.fastboot
, bool, 0600);
133 MODULE_PARM_DESC(fastboot
,
134 "Try to skip unnecessary mode sets at boot time (default: false)");
136 module_param_named(enable_pc8
, i915
.enable_pc8
, int, 0600);
137 MODULE_PARM_DESC(enable_pc8
,
138 "Enable support for low power package C states (PC8+) (default: true)");
140 module_param_named(pc8_timeout
, i915
.pc8_timeout
, int, 0600);
141 MODULE_PARM_DESC(pc8_timeout
,
142 "Number of msecs of idleness required to enter PC8+ (default: 5000)");
144 module_param_named(prefault_disable
, i915
.prefault_disable
, bool, 0600);
145 MODULE_PARM_DESC(prefault_disable
,
146 "Disable page prefaulting for pread/pwrite/reloc (default:false). "
147 "For developers only.");
149 module_param_named(invert_brightness
, i915
.invert_brightness
, int, 0600);
150 MODULE_PARM_DESC(invert_brightness
,
151 "Invert backlight brightness "
152 "(-1 force normal, 0 machine defaults, 1 force inversion), please "
153 "report PCI device ID, subsystem vendor and subsystem device ID "
154 "to dri-devel@lists.freedesktop.org, if your machine needs it. "
155 "It will then be included in an upcoming module version.");