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
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
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,
43 .prefault_disable
= 0,
44 .load_detect_test
= 0,
46 .invert_brightness
= 0,
48 .enable_cmd_parser
= 1,
52 .verbose_state_checks
= 1,
53 .nuclear_pageflip
= 0,
55 .enable_guc_submission
= false,
59 module_param_named(modeset
, i915
.modeset
, int, 0400);
60 MODULE_PARM_DESC(modeset
,
61 "Use kernel modesetting [KMS] (0=disable, "
62 "1=on, -1=force vga console preference [default])");
64 module_param_named_unsafe(panel_ignore_lid
, i915
.panel_ignore_lid
, int, 0600);
65 MODULE_PARM_DESC(panel_ignore_lid
,
66 "Override lid status (0=autodetect, 1=autodetect disabled [default], "
67 "-1=force lid closed, -2=force lid open)");
69 module_param_named_unsafe(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_unsafe(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_unsafe(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_unsafe(lvds_channel_mode
, i915
.lvds_channel_mode
, int, 0600);
88 MODULE_PARM_DESC(lvds_channel_mode
,
89 "Specify LVDS channel mode "
90 "(0=probe BIOS [default], 1=single-channel, 2=dual-channel)");
92 module_param_named_unsafe(lvds_use_ssc
, i915
.panel_use_ssc
, int, 0600);
93 MODULE_PARM_DESC(lvds_use_ssc
,
94 "Use Spread Spectrum Clock with panels [LVDS/eDP] "
95 "(default: auto from VBT)");
97 module_param_named_unsafe(vbt_sdvo_panel_type
, i915
.vbt_sdvo_panel_type
, int, 0600);
98 MODULE_PARM_DESC(vbt_sdvo_panel_type
,
99 "Override/Ignore selection of SDVO panel mode in the VBT "
100 "(-2=ignore, -1=auto [default], index in VBT BIOS table)");
102 module_param_named_unsafe(reset
, i915
.reset
, bool, 0600);
103 MODULE_PARM_DESC(reset
, "Attempt GPU resets (default: true)");
105 module_param_named_unsafe(enable_hangcheck
, i915
.enable_hangcheck
, bool, 0644);
106 MODULE_PARM_DESC(enable_hangcheck
,
107 "Periodically check GPU activity for detecting hangs. "
108 "WARNING: Disabling this can cause system wide hangs. "
111 module_param_named_unsafe(enable_ppgtt
, i915
.enable_ppgtt
, int, 0400);
112 MODULE_PARM_DESC(enable_ppgtt
,
113 "Override PPGTT usage. "
114 "(-1=auto [default], 0=disabled, 1=aliasing, 2=full)");
116 module_param_named_unsafe(enable_execlists
, i915
.enable_execlists
, int, 0400);
117 MODULE_PARM_DESC(enable_execlists
,
118 "Override execlists usage. "
119 "(-1=auto [default], 0=disabled, 1=enabled)");
121 module_param_named_unsafe(enable_psr
, i915
.enable_psr
, int, 0600);
122 MODULE_PARM_DESC(enable_psr
, "Enable PSR (default: false)");
124 module_param_named_unsafe(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_unsafe(disable_power_well
, i915
.disable_power_well
, int, 0600);
129 MODULE_PARM_DESC(disable_power_well
,
130 "Disable display power wells when possible "
131 "(-1=auto [default], 0=power wells always on, 1=power wells disabled when possible)");
133 module_param_named_unsafe(enable_ips
, i915
.enable_ips
, int, 0600);
134 MODULE_PARM_DESC(enable_ips
, "Enable IPS (default: true)");
136 module_param_named_unsafe(prefault_disable
, i915
.prefault_disable
, bool, 0600);
137 MODULE_PARM_DESC(prefault_disable
,
138 "Disable page prefaulting for pread/pwrite/reloc (default:false). "
139 "For developers only.");
141 module_param_named_unsafe(load_detect_test
, i915
.load_detect_test
, bool, 0600);
142 MODULE_PARM_DESC(load_detect_test
,
143 "Force-enable the VGA load detect code for testing (default:false). "
144 "For developers only.");
146 module_param_named_unsafe(invert_brightness
, i915
.invert_brightness
, int, 0600);
147 MODULE_PARM_DESC(invert_brightness
,
148 "Invert backlight brightness "
149 "(-1 force normal, 0 machine defaults, 1 force inversion), please "
150 "report PCI device ID, subsystem vendor and subsystem device ID "
151 "to dri-devel@lists.freedesktop.org, if your machine needs it. "
152 "It will then be included in an upcoming module version.");
154 module_param_named(disable_display
, i915
.disable_display
, bool, 0600);
155 MODULE_PARM_DESC(disable_display
, "Disable display (default: false)");
157 module_param_named_unsafe(disable_vtd_wa
, i915
.disable_vtd_wa
, bool, 0600);
158 MODULE_PARM_DESC(disable_vtd_wa
, "Disable all VT-d workarounds (default: false)");
160 module_param_named_unsafe(enable_cmd_parser
, i915
.enable_cmd_parser
, int, 0600);
161 MODULE_PARM_DESC(enable_cmd_parser
,
162 "Enable command parsing (1=enabled [default], 0=disabled)");
164 module_param_named_unsafe(use_mmio_flip
, i915
.use_mmio_flip
, int, 0600);
165 MODULE_PARM_DESC(use_mmio_flip
,
166 "use MMIO flips (-1=never, 0=driver discretion [default], 1=always)");
168 module_param_named(mmio_debug
, i915
.mmio_debug
, int, 0600);
169 MODULE_PARM_DESC(mmio_debug
,
170 "Enable the MMIO debug code for the first N failures (default: off). "
171 "This may negatively affect performance.");
173 module_param_named(verbose_state_checks
, i915
.verbose_state_checks
, bool, 0600);
174 MODULE_PARM_DESC(verbose_state_checks
,
175 "Enable verbose logs (ie. WARN_ON()) in case of unexpected hw state conditions.");
177 module_param_named_unsafe(nuclear_pageflip
, i915
.nuclear_pageflip
, bool, 0600);
178 MODULE_PARM_DESC(nuclear_pageflip
,
179 "Force atomic modeset functionality; asynchronous mode is not yet supported. (default: false).");
181 /* WA to get away with the default setting in VBT for early platforms.Will be removed */
182 module_param_named_unsafe(edp_vswing
, i915
.edp_vswing
, int, 0400);
183 MODULE_PARM_DESC(edp_vswing
,
184 "Ignore/Override vswing pre-emph table selection from VBT "
185 "(0=use value from vbt [default], 1=low power swing(200mV),"
186 "2=default swing(400mV))");
188 module_param_named_unsafe(enable_guc_submission
, i915
.enable_guc_submission
, bool, 0400);
189 MODULE_PARM_DESC(enable_guc_submission
, "Enable GuC submission (default:false)");
191 module_param_named(guc_log_level
, i915
.guc_log_level
, int, 0400);
192 MODULE_PARM_DESC(guc_log_level
,
193 "GuC firmware logging level (-1:disabled (default), 0-3:enabled)");