2 * Copyright © 2014 Intel Corporation
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
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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
21 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
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,
45 .prefault_disable
= 0,
47 .invert_brightness
= 0,
49 .enable_cmd_parser
= 1,
55 module_param_named(modeset
, i915
.modeset
, int, 0400);
56 MODULE_PARM_DESC(modeset
,
57 "Use kernel modesetting [KMS] (0=DRM_I915_KMS from .config, "
58 "1=on, -1=force vga console preference [default])");
60 module_param_named(panel_ignore_lid
, i915
.panel_ignore_lid
, int, 0600);
61 MODULE_PARM_DESC(panel_ignore_lid
,
62 "Override lid status (0=autodetect, 1=autodetect disabled [default], "
63 "-1=force lid closed, -2=force lid open)");
65 module_param_named(powersave
, i915
.powersave
, int, 0600);
66 MODULE_PARM_DESC(powersave
,
67 "Enable powersavings, fbc, downclocking, etc. (default: true)");
69 module_param_named(semaphores
, i915
.semaphores
, int, 0400);
70 MODULE_PARM_DESC(semaphores
,
71 "Use semaphores for inter-ring sync "
72 "(default: -1 (use per-chip defaults))");
74 module_param_named(enable_rc6
, i915
.enable_rc6
, int, 0400);
75 MODULE_PARM_DESC(enable_rc6
,
76 "Enable power-saving render C-state 6. "
77 "Different stages can be selected via bitmask values "
78 "(0 = disable; 1 = enable rc6; 2 = enable deep rc6; 4 = enable deepest rc6). "
79 "For example, 3 would enable rc6 and deep rc6, and 7 would enable everything. "
80 "default: -1 (use per-chip default)");
82 module_param_named(enable_fbc
, i915
.enable_fbc
, int, 0600);
83 MODULE_PARM_DESC(enable_fbc
,
84 "Enable frame buffer compression for power savings "
85 "(default: -1 (use per-chip default))");
87 module_param_named(lvds_downclock
, i915
.lvds_downclock
, int, 0400);
88 MODULE_PARM_DESC(lvds_downclock
,
89 "Use panel (LVDS/eDP) downclocking for power savings "
92 module_param_named(lvds_channel_mode
, i915
.lvds_channel_mode
, int, 0600);
93 MODULE_PARM_DESC(lvds_channel_mode
,
94 "Specify LVDS channel mode "
95 "(0=probe BIOS [default], 1=single-channel, 2=dual-channel)");
97 module_param_named(lvds_use_ssc
, i915
.panel_use_ssc
, int, 0600);
98 MODULE_PARM_DESC(lvds_use_ssc
,
99 "Use Spread Spectrum Clock with panels [LVDS/eDP] "
100 "(default: auto from VBT)");
102 module_param_named(vbt_sdvo_panel_type
, i915
.vbt_sdvo_panel_type
, int, 0600);
103 MODULE_PARM_DESC(vbt_sdvo_panel_type
,
104 "Override/Ignore selection of SDVO panel mode in the VBT "
105 "(-2=ignore, -1=auto [default], index in VBT BIOS table)");
107 module_param_named(reset
, i915
.reset
, bool, 0600);
108 MODULE_PARM_DESC(reset
, "Attempt GPU resets (default: true)");
110 module_param_named(enable_hangcheck
, i915
.enable_hangcheck
, bool, 0644);
111 MODULE_PARM_DESC(enable_hangcheck
,
112 "Periodically check GPU activity for detecting hangs. "
113 "WARNING: Disabling this can cause system wide hangs. "
116 module_param_named(enable_ppgtt
, i915
.enable_ppgtt
, int, 0400);
117 MODULE_PARM_DESC(enable_ppgtt
,
118 "Override PPGTT usage. "
119 "(-1=auto [default], 0=disabled, 1=aliasing, 2=full)");
121 module_param_named(enable_psr
, i915
.enable_psr
, int, 0600);
122 MODULE_PARM_DESC(enable_psr
, "Enable PSR (default: true)");
124 module_param_named(preliminary_hw_support
, i915
.preliminary_hw_support
, int, 0600);
125 MODULE_PARM_DESC(preliminary_hw_support
,
126 "Enable preliminary hardware support.");
128 module_param_named(disable_power_well
, i915
.disable_power_well
, int, 0600);
129 MODULE_PARM_DESC(disable_power_well
,
130 "Disable the power well when possible (default: true)");
132 module_param_named(enable_ips
, i915
.enable_ips
, int, 0600);
133 MODULE_PARM_DESC(enable_ips
, "Enable IPS (default: true)");
135 module_param_named(fastboot
, i915
.fastboot
, bool, 0600);
136 MODULE_PARM_DESC(fastboot
,
137 "Try to skip unnecessary mode sets at boot time (default: false)");
139 module_param_named(prefault_disable
, i915
.prefault_disable
, bool, 0600);
140 MODULE_PARM_DESC(prefault_disable
,
141 "Disable page prefaulting for pread/pwrite/reloc (default:false). "
142 "For developers only.");
144 module_param_named(invert_brightness
, i915
.invert_brightness
, int, 0600);
145 MODULE_PARM_DESC(invert_brightness
,
146 "Invert backlight brightness "
147 "(-1 force normal, 0 machine defaults, 1 force inversion), please "
148 "report PCI device ID, subsystem vendor and subsystem device ID "
149 "to dri-devel@lists.freedesktop.org, if your machine needs it. "
150 "It will then be included in an upcoming module version.");
152 module_param_named(disable_display
, i915
.disable_display
, bool, 0600);
153 MODULE_PARM_DESC(disable_display
, "Disable display (default: false)");
155 module_param_named(disable_vtd_wa
, i915
.disable_vtd_wa
, bool, 0600);
156 MODULE_PARM_DESC(disable_vtd_wa
, "Disable all VT-d workarounds (default: false)");
158 module_param_named(enable_cmd_parser
, i915
.enable_cmd_parser
, int, 0600);
159 MODULE_PARM_DESC(enable_cmd_parser
,
160 "Enable command parsing (1=enabled [default], 0=disabled)");
162 module_param_named(use_mmio_flip
, i915
.use_mmio_flip
, int, 0600);
163 MODULE_PARM_DESC(use_mmio_flip
,
164 "use MMIO flips (-1=never, 0=driver discretion [default], 1=always)");
166 module_param_named(mmio_debug
, i915
.mmio_debug
, bool, 0600);
167 MODULE_PARM_DESC(mmio_debug
,
168 "Enable the MMIO debug code (default: false). This may negatively "
169 "affect performance.");