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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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_execlists
= -1,
39 .enable_hangcheck
= true,
42 .preliminary_hw_support
= IS_ENABLED(CONFIG_DRM_I915_PRELIMINARY_HW_SUPPORT
),
43 .disable_power_well
= 1,
46 .prefault_disable
= 0,
48 .invert_brightness
= 0,
50 .enable_cmd_parser
= 1,
56 module_param_named(modeset
, i915
.modeset
, int, 0400);
57 MODULE_PARM_DESC(modeset
,
58 "Use kernel modesetting [KMS] (0=DRM_I915_KMS from .config, "
59 "1=on, -1=force vga console preference [default])");
61 module_param_named(panel_ignore_lid
, i915
.panel_ignore_lid
, int, 0600);
62 MODULE_PARM_DESC(panel_ignore_lid
,
63 "Override lid status (0=autodetect, 1=autodetect disabled [default], "
64 "-1=force lid closed, -2=force lid open)");
66 module_param_named(powersave
, i915
.powersave
, int, 0600);
67 MODULE_PARM_DESC(powersave
,
68 "Enable powersavings, fbc, downclocking, etc. (default: true)");
70 module_param_named(semaphores
, i915
.semaphores
, int, 0400);
71 MODULE_PARM_DESC(semaphores
,
72 "Use semaphores for inter-ring sync "
73 "(default: -1 (use per-chip defaults))");
75 module_param_named(enable_rc6
, i915
.enable_rc6
, int, 0400);
76 MODULE_PARM_DESC(enable_rc6
,
77 "Enable power-saving render C-state 6. "
78 "Different stages can be selected via bitmask values "
79 "(0 = disable; 1 = enable rc6; 2 = enable deep rc6; 4 = enable deepest rc6). "
80 "For example, 3 would enable rc6 and deep rc6, and 7 would enable everything. "
81 "default: -1 (use per-chip default)");
83 module_param_named(enable_fbc
, i915
.enable_fbc
, int, 0600);
84 MODULE_PARM_DESC(enable_fbc
,
85 "Enable frame buffer compression for power savings "
86 "(default: -1 (use per-chip default))");
88 module_param_named(lvds_downclock
, i915
.lvds_downclock
, int, 0400);
89 MODULE_PARM_DESC(lvds_downclock
,
90 "Use panel (LVDS/eDP) downclocking for power savings "
93 module_param_named(lvds_channel_mode
, i915
.lvds_channel_mode
, int, 0600);
94 MODULE_PARM_DESC(lvds_channel_mode
,
95 "Specify LVDS channel mode "
96 "(0=probe BIOS [default], 1=single-channel, 2=dual-channel)");
98 module_param_named(lvds_use_ssc
, i915
.panel_use_ssc
, int, 0600);
99 MODULE_PARM_DESC(lvds_use_ssc
,
100 "Use Spread Spectrum Clock with panels [LVDS/eDP] "
101 "(default: auto from VBT)");
103 module_param_named(vbt_sdvo_panel_type
, i915
.vbt_sdvo_panel_type
, int, 0600);
104 MODULE_PARM_DESC(vbt_sdvo_panel_type
,
105 "Override/Ignore selection of SDVO panel mode in the VBT "
106 "(-2=ignore, -1=auto [default], index in VBT BIOS table)");
108 module_param_named(reset
, i915
.reset
, bool, 0600);
109 MODULE_PARM_DESC(reset
, "Attempt GPU resets (default: true)");
111 module_param_named(enable_hangcheck
, i915
.enable_hangcheck
, bool, 0644);
112 MODULE_PARM_DESC(enable_hangcheck
,
113 "Periodically check GPU activity for detecting hangs. "
114 "WARNING: Disabling this can cause system wide hangs. "
117 module_param_named(enable_ppgtt
, i915
.enable_ppgtt
, int, 0400);
118 MODULE_PARM_DESC(enable_ppgtt
,
119 "Override PPGTT usage. "
120 "(-1=auto [default], 0=disabled, 1=aliasing, 2=full)");
122 module_param_named(enable_execlists
, i915
.enable_execlists
, int, 0400);
123 MODULE_PARM_DESC(enable_execlists
,
124 "Override execlists usage. "
125 "(-1=auto [default], 0=disabled, 1=enabled)");
127 module_param_named(enable_psr
, i915
.enable_psr
, int, 0600);
128 MODULE_PARM_DESC(enable_psr
, "Enable PSR (default: true)");
130 module_param_named(preliminary_hw_support
, i915
.preliminary_hw_support
, int, 0600);
131 MODULE_PARM_DESC(preliminary_hw_support
,
132 "Enable preliminary hardware support.");
134 module_param_named(disable_power_well
, i915
.disable_power_well
, int, 0600);
135 MODULE_PARM_DESC(disable_power_well
,
136 "Disable the power well when possible (default: true)");
138 module_param_named(enable_ips
, i915
.enable_ips
, int, 0600);
139 MODULE_PARM_DESC(enable_ips
, "Enable IPS (default: true)");
141 module_param_named(fastboot
, i915
.fastboot
, bool, 0600);
142 MODULE_PARM_DESC(fastboot
,
143 "Try to skip unnecessary mode sets at boot time (default: false)");
145 module_param_named(prefault_disable
, i915
.prefault_disable
, bool, 0600);
146 MODULE_PARM_DESC(prefault_disable
,
147 "Disable page prefaulting for pread/pwrite/reloc (default:false). "
148 "For developers only.");
150 module_param_named(invert_brightness
, i915
.invert_brightness
, int, 0600);
151 MODULE_PARM_DESC(invert_brightness
,
152 "Invert backlight brightness "
153 "(-1 force normal, 0 machine defaults, 1 force inversion), please "
154 "report PCI device ID, subsystem vendor and subsystem device ID "
155 "to dri-devel@lists.freedesktop.org, if your machine needs it. "
156 "It will then be included in an upcoming module version.");
158 module_param_named(disable_display
, i915
.disable_display
, bool, 0600);
159 MODULE_PARM_DESC(disable_display
, "Disable display (default: false)");
161 module_param_named(disable_vtd_wa
, i915
.disable_vtd_wa
, bool, 0600);
162 MODULE_PARM_DESC(disable_vtd_wa
, "Disable all VT-d workarounds (default: false)");
164 module_param_named(enable_cmd_parser
, i915
.enable_cmd_parser
, int, 0600);
165 MODULE_PARM_DESC(enable_cmd_parser
,
166 "Enable command parsing (1=enabled [default], 0=disabled)");
168 module_param_named(use_mmio_flip
, i915
.use_mmio_flip
, int, 0600);
169 MODULE_PARM_DESC(use_mmio_flip
,
170 "use MMIO flips (-1=never, 0=driver discretion [default], 1=always)");
172 module_param_named(mmio_debug
, i915
.mmio_debug
, bool, 0600);
173 MODULE_PARM_DESC(mmio_debug
,
174 "Enable the MMIO debug code (default: false). This may negatively "
175 "affect performance.");