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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,
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25 #include "i915_params.h"
28 struct i915_params i915 __read_mostly
= {
30 .panel_ignore_lid
= 1,
32 .lvds_channel_mode
= 0,
34 .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,
47 .load_detect_test
= 0,
48 .force_reset_modeset_test
= 0,
50 .invert_brightness
= 0,
52 .enable_cmd_parser
= 1,
55 .verbose_state_checks
= 1,
56 .nuclear_pageflip
= 0,
58 .enable_guc_loading
= 0,
59 .enable_guc_submission
= 0,
61 .enable_dp_mst
= true,
62 .inject_load_failure
= 0,
63 .enable_dpcd_backlight
= false,
67 module_param_named(modeset
, i915
.modeset
, int, 0400);
68 MODULE_PARM_DESC(modeset
,
69 "Use kernel modesetting [KMS] (0=disable, "
70 "1=on, -1=force vga console preference [default])");
72 module_param_named_unsafe(panel_ignore_lid
, i915
.panel_ignore_lid
, int, 0600);
73 MODULE_PARM_DESC(panel_ignore_lid
,
74 "Override lid status (0=autodetect, 1=autodetect disabled [default], "
75 "-1=force lid closed, -2=force lid open)");
77 module_param_named_unsafe(semaphores
, i915
.semaphores
, int, 0400);
78 MODULE_PARM_DESC(semaphores
,
79 "Use semaphores for inter-ring sync "
80 "(default: -1 (use per-chip defaults))");
82 module_param_named_unsafe(enable_rc6
, i915
.enable_rc6
, int, 0400);
83 MODULE_PARM_DESC(enable_rc6
,
84 "Enable power-saving render C-state 6. "
85 "Different stages can be selected via bitmask values "
86 "(0 = disable; 1 = enable rc6; 2 = enable deep rc6; 4 = enable deepest rc6). "
87 "For example, 3 would enable rc6 and deep rc6, and 7 would enable everything. "
88 "default: -1 (use per-chip default)");
90 module_param_named_unsafe(enable_dc
, i915
.enable_dc
, int, 0400);
91 MODULE_PARM_DESC(enable_dc
,
92 "Enable power-saving display C-states. "
93 "(-1=auto [default]; 0=disable; 1=up to DC5; 2=up to DC6)");
95 module_param_named_unsafe(enable_fbc
, i915
.enable_fbc
, int, 0600);
96 MODULE_PARM_DESC(enable_fbc
,
97 "Enable frame buffer compression for power savings "
98 "(default: -1 (use per-chip default))");
100 module_param_named_unsafe(lvds_channel_mode
, i915
.lvds_channel_mode
, int, 0400);
101 MODULE_PARM_DESC(lvds_channel_mode
,
102 "Specify LVDS channel mode "
103 "(0=probe BIOS [default], 1=single-channel, 2=dual-channel)");
105 module_param_named_unsafe(lvds_use_ssc
, i915
.panel_use_ssc
, int, 0600);
106 MODULE_PARM_DESC(lvds_use_ssc
,
107 "Use Spread Spectrum Clock with panels [LVDS/eDP] "
108 "(default: auto from VBT)");
110 module_param_named_unsafe(vbt_sdvo_panel_type
, i915
.vbt_sdvo_panel_type
, int, 0400);
111 MODULE_PARM_DESC(vbt_sdvo_panel_type
,
112 "Override/Ignore selection of SDVO panel mode in the VBT "
113 "(-2=ignore, -1=auto [default], index in VBT BIOS table)");
115 module_param_named_unsafe(reset
, i915
.reset
, bool, 0600);
116 MODULE_PARM_DESC(reset
, "Attempt GPU resets (default: true)");
118 module_param_named_unsafe(enable_hangcheck
, i915
.enable_hangcheck
, bool, 0644);
119 MODULE_PARM_DESC(enable_hangcheck
,
120 "Periodically check GPU activity for detecting hangs. "
121 "WARNING: Disabling this can cause system wide hangs. "
124 module_param_named_unsafe(enable_ppgtt
, i915
.enable_ppgtt
, int, 0400);
125 MODULE_PARM_DESC(enable_ppgtt
,
126 "Override PPGTT usage. "
127 "(-1=auto [default], 0=disabled, 1=aliasing, 2=full, 3=full with extended address space)");
129 module_param_named_unsafe(enable_execlists
, i915
.enable_execlists
, int, 0400);
130 MODULE_PARM_DESC(enable_execlists
,
131 "Override execlists usage. "
132 "(-1=auto [default], 0=disabled, 1=enabled)");
134 module_param_named_unsafe(enable_psr
, i915
.enable_psr
, int, 0600);
135 MODULE_PARM_DESC(enable_psr
, "Enable PSR "
136 "(0=disabled, 1=enabled - link mode chosen per-platform, 2=force link-standby mode, 3=force link-off mode) "
137 "Default: -1 (use per-chip default)");
139 module_param_named_unsafe(preliminary_hw_support
, i915
.preliminary_hw_support
, int, 0400);
140 MODULE_PARM_DESC(preliminary_hw_support
,
141 "Enable preliminary hardware support.");
143 module_param_named_unsafe(disable_power_well
, i915
.disable_power_well
, int, 0400);
144 MODULE_PARM_DESC(disable_power_well
,
145 "Disable display power wells when possible "
146 "(-1=auto [default], 0=power wells always on, 1=power wells disabled when possible)");
148 module_param_named_unsafe(enable_ips
, i915
.enable_ips
, int, 0600);
149 MODULE_PARM_DESC(enable_ips
, "Enable IPS (default: true)");
151 module_param_named(fastboot
, i915
.fastboot
, bool, 0600);
152 MODULE_PARM_DESC(fastboot
,
153 "Try to skip unnecessary mode sets at boot time (default: false)");
155 module_param_named_unsafe(prefault_disable
, i915
.prefault_disable
, bool, 0600);
156 MODULE_PARM_DESC(prefault_disable
,
157 "Disable page prefaulting for pread/pwrite/reloc (default:false). "
158 "For developers only.");
160 module_param_named_unsafe(load_detect_test
, i915
.load_detect_test
, bool, 0600);
161 MODULE_PARM_DESC(load_detect_test
,
162 "Force-enable the VGA load detect code for testing (default:false). "
163 "For developers only.");
165 module_param_named_unsafe(force_reset_modeset_test
, i915
.force_reset_modeset_test
, bool, 0600);
166 MODULE_PARM_DESC(force_reset_modeset_test
,
167 "Force a modeset during gpu reset for testing (default:false). "
168 "For developers only.");
170 module_param_named_unsafe(invert_brightness
, i915
.invert_brightness
, int, 0600);
171 MODULE_PARM_DESC(invert_brightness
,
172 "Invert backlight brightness "
173 "(-1 force normal, 0 machine defaults, 1 force inversion), please "
174 "report PCI device ID, subsystem vendor and subsystem device ID "
175 "to dri-devel@lists.freedesktop.org, if your machine needs it. "
176 "It will then be included in an upcoming module version.");
178 module_param_named(disable_display
, i915
.disable_display
, bool, 0400);
179 MODULE_PARM_DESC(disable_display
, "Disable display (default: false)");
181 module_param_named_unsafe(enable_cmd_parser
, i915
.enable_cmd_parser
, int, 0600);
182 MODULE_PARM_DESC(enable_cmd_parser
,
183 "Enable command parsing (1=enabled [default], 0=disabled)");
185 module_param_named_unsafe(use_mmio_flip
, i915
.use_mmio_flip
, int, 0600);
186 MODULE_PARM_DESC(use_mmio_flip
,
187 "use MMIO flips (-1=never, 0=driver discretion [default], 1=always)");
189 module_param_named(mmio_debug
, i915
.mmio_debug
, int, 0600);
190 MODULE_PARM_DESC(mmio_debug
,
191 "Enable the MMIO debug code for the first N failures (default: off). "
192 "This may negatively affect performance.");
194 module_param_named(verbose_state_checks
, i915
.verbose_state_checks
, bool, 0600);
195 MODULE_PARM_DESC(verbose_state_checks
,
196 "Enable verbose logs (ie. WARN_ON()) in case of unexpected hw state conditions.");
198 module_param_named_unsafe(nuclear_pageflip
, i915
.nuclear_pageflip
, bool, 0600);
199 MODULE_PARM_DESC(nuclear_pageflip
,
200 "Force atomic modeset functionality; asynchronous mode is not yet supported. (default: false).");
202 /* WA to get away with the default setting in VBT for early platforms.Will be removed */
203 module_param_named_unsafe(edp_vswing
, i915
.edp_vswing
, int, 0400);
204 MODULE_PARM_DESC(edp_vswing
,
205 "Ignore/Override vswing pre-emph table selection from VBT "
206 "(0=use value from vbt [default], 1=low power swing(200mV),"
207 "2=default swing(400mV))");
209 module_param_named_unsafe(enable_guc_loading
, i915
.enable_guc_loading
, int, 0400);
210 MODULE_PARM_DESC(enable_guc_loading
,
211 "Enable GuC firmware loading "
212 "(-1=auto, 0=never [default], 1=if available, 2=required)");
214 module_param_named_unsafe(enable_guc_submission
, i915
.enable_guc_submission
, int, 0400);
215 MODULE_PARM_DESC(enable_guc_submission
,
216 "Enable GuC submission "
217 "(-1=auto, 0=never [default], 1=if available, 2=required)");
219 module_param_named(guc_log_level
, i915
.guc_log_level
, int, 0400);
220 MODULE_PARM_DESC(guc_log_level
,
221 "GuC firmware logging level (-1:disabled (default), 0-3:enabled)");
223 module_param_named_unsafe(enable_dp_mst
, i915
.enable_dp_mst
, bool, 0600);
224 MODULE_PARM_DESC(enable_dp_mst
,
225 "Enable multi-stream transport (MST) for new DisplayPort sinks. (default: true)");
226 module_param_named_unsafe(inject_load_failure
, i915
.inject_load_failure
, uint
, 0400);
227 MODULE_PARM_DESC(inject_load_failure
,
228 "Force an error after a number of failure check points (0:disabled (default), N:force failure at the Nth failure check point)");
229 module_param_named(enable_dpcd_backlight
, i915
.enable_dpcd_backlight
, bool, 0600);
230 MODULE_PARM_DESC(enable_dpcd_backlight
,
231 "Enable support for DPCD backlight control (default:false)");
233 module_param_named(enable_gvt
, i915
.enable_gvt
, bool, 0400);
234 MODULE_PARM_DESC(enable_gvt
,
235 "Enable support for Intel GVT-g graphics virtualization host support(default:false)");