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
7 * without limitation the rights to use, copy, modify, merge, publish,
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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,
31 .lvds_channel_mode
= 0,
33 .vbt_sdvo_panel_type
= -1,
36 .enable_execlists
= -1,
37 .enable_hangcheck
= true,
40 .preliminary_hw_support
= IS_ENABLED(CONFIG_DRM_I915_PRELIMINARY_HW_SUPPORT
),
41 .disable_power_well
= 1,
44 .prefault_disable
= 0,
45 .load_detect_test
= 0,
47 .invert_brightness
= 0,
49 .enable_cmd_parser
= 1,
53 .verbose_state_checks
= 1,
57 module_param_named(modeset
, i915
.modeset
, int, 0400);
58 MODULE_PARM_DESC(modeset
,
59 "Use kernel modesetting [KMS] (0=disable, "
60 "1=on, -1=force vga console preference [default])");
62 module_param_named(panel_ignore_lid
, i915
.panel_ignore_lid
, int, 0600);
63 MODULE_PARM_DESC(panel_ignore_lid
,
64 "Override lid status (0=autodetect, 1=autodetect disabled [default], "
65 "-1=force lid closed, -2=force lid open)");
67 module_param_named_unsafe(semaphores
, i915
.semaphores
, int, 0400);
68 MODULE_PARM_DESC(semaphores
,
69 "Use semaphores for inter-ring sync "
70 "(default: -1 (use per-chip defaults))");
72 module_param_named_unsafe(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)");
80 module_param_named_unsafe(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))");
85 module_param_named(lvds_channel_mode
, i915
.lvds_channel_mode
, int, 0600);
86 MODULE_PARM_DESC(lvds_channel_mode
,
87 "Specify LVDS channel mode "
88 "(0=probe BIOS [default], 1=single-channel, 2=dual-channel)");
90 module_param_named(lvds_use_ssc
, i915
.panel_use_ssc
, int, 0600);
91 MODULE_PARM_DESC(lvds_use_ssc
,
92 "Use Spread Spectrum Clock with panels [LVDS/eDP] "
93 "(default: auto from VBT)");
95 module_param_named(vbt_sdvo_panel_type
, i915
.vbt_sdvo_panel_type
, int, 0600);
96 MODULE_PARM_DESC(vbt_sdvo_panel_type
,
97 "Override/Ignore selection of SDVO panel mode in the VBT "
98 "(-2=ignore, -1=auto [default], index in VBT BIOS table)");
100 module_param_named_unsafe(reset
, i915
.reset
, bool, 0600);
101 MODULE_PARM_DESC(reset
, "Attempt GPU resets (default: true)");
103 module_param_named(enable_hangcheck
, i915
.enable_hangcheck
, bool, 0644);
104 MODULE_PARM_DESC(enable_hangcheck
,
105 "Periodically check GPU activity for detecting hangs. "
106 "WARNING: Disabling this can cause system wide hangs. "
109 module_param_named_unsafe(enable_ppgtt
, i915
.enable_ppgtt
, int, 0400);
110 MODULE_PARM_DESC(enable_ppgtt
,
111 "Override PPGTT usage. "
112 "(-1=auto [default], 0=disabled, 1=aliasing, 2=full)");
114 module_param_named(enable_execlists
, i915
.enable_execlists
, int, 0400);
115 MODULE_PARM_DESC(enable_execlists
,
116 "Override execlists usage. "
117 "(-1=auto [default], 0=disabled, 1=enabled)");
119 module_param_named(enable_psr
, i915
.enable_psr
, int, 0600);
120 MODULE_PARM_DESC(enable_psr
, "Enable PSR (default: false)");
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.");
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)");
130 module_param_named(enable_ips
, i915
.enable_ips
, int, 0600);
131 MODULE_PARM_DESC(enable_ips
, "Enable IPS (default: true)");
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)");
137 module_param_named_unsafe(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.");
142 module_param_named_unsafe(load_detect_test
, i915
.load_detect_test
, bool, 0600);
143 MODULE_PARM_DESC(load_detect_test
,
144 "Force-enable the VGA load detect code for testing (default:false). "
145 "For developers only.");
147 module_param_named(invert_brightness
, i915
.invert_brightness
, int, 0600);
148 MODULE_PARM_DESC(invert_brightness
,
149 "Invert backlight brightness "
150 "(-1 force normal, 0 machine defaults, 1 force inversion), please "
151 "report PCI device ID, subsystem vendor and subsystem device ID "
152 "to dri-devel@lists.freedesktop.org, if your machine needs it. "
153 "It will then be included in an upcoming module version.");
155 module_param_named(disable_display
, i915
.disable_display
, bool, 0600);
156 MODULE_PARM_DESC(disable_display
, "Disable display (default: false)");
158 module_param_named(disable_vtd_wa
, i915
.disable_vtd_wa
, bool, 0600);
159 MODULE_PARM_DESC(disable_vtd_wa
, "Disable all VT-d workarounds (default: false)");
161 module_param_named(enable_cmd_parser
, i915
.enable_cmd_parser
, int, 0600);
162 MODULE_PARM_DESC(enable_cmd_parser
,
163 "Enable command parsing (1=enabled [default], 0=disabled)");
165 module_param_named(use_mmio_flip
, i915
.use_mmio_flip
, int, 0600);
166 MODULE_PARM_DESC(use_mmio_flip
,
167 "use MMIO flips (-1=never, 0=driver discretion [default], 1=always)");
169 module_param_named(mmio_debug
, i915
.mmio_debug
, int, 0600);
170 MODULE_PARM_DESC(mmio_debug
,
171 "Enable the MMIO debug code for the first N failures (default: off). "
172 "This may negatively affect performance.");
174 module_param_named(verbose_state_checks
, i915
.verbose_state_checks
, bool, 0600);
175 MODULE_PARM_DESC(verbose_state_checks
,
176 "Enable verbose logs (ie. WARN_ON()) in case of unexpected hw state conditions.");
178 /* WA to get away with the default setting in VBT for early platforms.Will be removed */
179 module_param_named_unsafe(edp_vswing
, i915
.edp_vswing
, int, 0400);
180 MODULE_PARM_DESC(edp_vswing
,
181 "Ignore/Override vswing pre-emph table selection from VBT "
182 "(0=use value from vbt [default], 1=low power swing(200mV),"
183 "2=default swing(400mV))");