2 * Copyright © 2014 Intel Corporation
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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,
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,
54 .nuclear_pageflip
= 0,
56 .enable_guc_submission
= false,
60 module_param_named(modeset
, i915
.modeset
, int, 0400);
61 MODULE_PARM_DESC(modeset
,
62 "Use kernel modesetting [KMS] (0=disable, "
63 "1=on, -1=force vga console preference [default])");
65 module_param_named(panel_ignore_lid
, i915
.panel_ignore_lid
, int, 0600);
66 MODULE_PARM_DESC(panel_ignore_lid
,
67 "Override lid status (0=autodetect, 1=autodetect disabled [default], "
68 "-1=force lid closed, -2=force lid open)");
70 module_param_named_unsafe(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_unsafe(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_unsafe(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_channel_mode
, i915
.lvds_channel_mode
, int, 0600);
89 MODULE_PARM_DESC(lvds_channel_mode
,
90 "Specify LVDS channel mode "
91 "(0=probe BIOS [default], 1=single-channel, 2=dual-channel)");
93 module_param_named(lvds_use_ssc
, i915
.panel_use_ssc
, int, 0600);
94 MODULE_PARM_DESC(lvds_use_ssc
,
95 "Use Spread Spectrum Clock with panels [LVDS/eDP] "
96 "(default: auto from VBT)");
98 module_param_named(vbt_sdvo_panel_type
, i915
.vbt_sdvo_panel_type
, int, 0600);
99 MODULE_PARM_DESC(vbt_sdvo_panel_type
,
100 "Override/Ignore selection of SDVO panel mode in the VBT "
101 "(-2=ignore, -1=auto [default], index in VBT BIOS table)");
103 module_param_named_unsafe(reset
, i915
.reset
, bool, 0600);
104 MODULE_PARM_DESC(reset
, "Attempt GPU resets (default: true)");
106 module_param_named(enable_hangcheck
, i915
.enable_hangcheck
, bool, 0644);
107 MODULE_PARM_DESC(enable_hangcheck
,
108 "Periodically check GPU activity for detecting hangs. "
109 "WARNING: Disabling this can cause system wide hangs. "
112 module_param_named_unsafe(enable_ppgtt
, i915
.enable_ppgtt
, int, 0400);
113 MODULE_PARM_DESC(enable_ppgtt
,
114 "Override PPGTT usage. "
115 "(-1=auto [default], 0=disabled, 1=aliasing, 2=full)");
117 module_param_named(enable_execlists
, i915
.enable_execlists
, int, 0400);
118 MODULE_PARM_DESC(enable_execlists
,
119 "Override execlists usage. "
120 "(-1=auto [default], 0=disabled, 1=enabled)");
122 module_param_named(enable_psr
, i915
.enable_psr
, int, 0600);
123 MODULE_PARM_DESC(enable_psr
, "Enable PSR (default: false)");
125 module_param_named(preliminary_hw_support
, i915
.preliminary_hw_support
, int, 0600);
126 MODULE_PARM_DESC(preliminary_hw_support
,
127 "Enable preliminary hardware support.");
129 module_param_named(disable_power_well
, i915
.disable_power_well
, int, 0600);
130 MODULE_PARM_DESC(disable_power_well
,
131 "Disable the power well when possible (default: true)");
133 module_param_named(enable_ips
, i915
.enable_ips
, int, 0600);
134 MODULE_PARM_DESC(enable_ips
, "Enable IPS (default: true)");
136 module_param_named(fastboot
, i915
.fastboot
, bool, 0600);
137 MODULE_PARM_DESC(fastboot
,
138 "Try to skip unnecessary mode sets at boot time (default: false)");
140 module_param_named_unsafe(prefault_disable
, i915
.prefault_disable
, bool, 0600);
141 MODULE_PARM_DESC(prefault_disable
,
142 "Disable page prefaulting for pread/pwrite/reloc (default:false). "
143 "For developers only.");
145 module_param_named_unsafe(load_detect_test
, i915
.load_detect_test
, bool, 0600);
146 MODULE_PARM_DESC(load_detect_test
,
147 "Force-enable the VGA load detect code for testing (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
, int, 0600);
173 MODULE_PARM_DESC(mmio_debug
,
174 "Enable the MMIO debug code for the first N failures (default: off). "
175 "This may negatively affect performance.");
177 module_param_named(verbose_state_checks
, i915
.verbose_state_checks
, bool, 0600);
178 MODULE_PARM_DESC(verbose_state_checks
,
179 "Enable verbose logs (ie. WARN_ON()) in case of unexpected hw state conditions.");
181 module_param_named_unsafe(nuclear_pageflip
, i915
.nuclear_pageflip
, bool, 0600);
182 MODULE_PARM_DESC(nuclear_pageflip
,
183 "Force atomic modeset functionality; asynchronous mode is not yet supported. (default: false).");
185 /* WA to get away with the default setting in VBT for early platforms.Will be removed */
186 module_param_named_unsafe(edp_vswing
, i915
.edp_vswing
, int, 0400);
187 MODULE_PARM_DESC(edp_vswing
,
188 "Ignore/Override vswing pre-emph table selection from VBT "
189 "(0=use value from vbt [default], 1=low power swing(200mV),"
190 "2=default swing(400mV))");
192 module_param_named_unsafe(enable_guc_submission
, i915
.enable_guc_submission
, bool, 0400);
193 MODULE_PARM_DESC(enable_guc_submission
, "Enable GuC submission (default:false)");
195 module_param_named(guc_log_level
, i915
.guc_log_level
, int, 0400);
196 MODULE_PARM_DESC(guc_log_level
,
197 "GuC firmware logging level (-1:disabled (default), 0-3:enabled)");