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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,
49 .invert_brightness = 0,
51 .enable_cmd_parser = 0,
54 .verbose_state_checks = 1,
55 .nuclear_pageflip = 0,
57 .enable_guc_submission = false,
59 .enable_dp_mst = true,
60 .inject_load_failure = 0,
63 module_param_named(modeset, i915.modeset, int, 0400);
64 TUNABLE_INT("drm.i915.modeset", &i915.modeset);
65 MODULE_PARM_DESC(modeset,
66 "Use kernel modesetting [KMS] (0=disable, "
67 "1=on, -1=force vga console preference [default])");
69 module_param_named_unsafe(panel_ignore_lid, i915.panel_ignore_lid, int, 0600);
70 TUNABLE_INT("drm.i915.panel_ignore_lid", &i915.panel_ignore_lid);
71 MODULE_PARM_DESC(panel_ignore_lid,
72 "Override lid status (0=autodetect, 1=autodetect disabled [default], "
73 "-1=force lid closed, -2=force lid open)");
75 module_param_named_unsafe(semaphores, i915.semaphores, int, 0400);
76 TUNABLE_INT("drm.i915.semaphores", &i915.semaphores);
77 MODULE_PARM_DESC(semaphores,
78 "Use semaphores for inter-ring sync "
79 "(default: -1 (use per-chip defaults))");
81 module_param_named_unsafe(enable_rc6, i915.enable_rc6, int, 0400);
82 TUNABLE_INT("drm.i915.enable_rc6", &i915.enable_rc6);
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 TUNABLE_INT("drm.i915.enable_fbc", &i915.enable_fbc);
97 MODULE_PARM_DESC(enable_fbc,
98 "Enable frame buffer compression for power savings "
99 "(default: -1 (use per-chip default))");
101 module_param_named_unsafe(lvds_channel_mode, i915.lvds_channel_mode, int, 0400);
102 TUNABLE_INT("drm.i915.lvds_channel_mode", &i915.lvds_channel_mode);
103 MODULE_PARM_DESC(lvds_channel_mode,
104 "Specify LVDS channel mode "
105 "(0=probe BIOS [default], 1=single-channel, 2=dual-channel)");
107 module_param_named_unsafe(lvds_use_ssc, i915.panel_use_ssc, int, 0600);
108 TUNABLE_INT("drm.i915.panel_use_ssc", &i915.panel_use_ssc);
109 MODULE_PARM_DESC(lvds_use_ssc,
110 "Use Spread Spectrum Clock with panels [LVDS/eDP] "
111 "(default: auto from VBT)");
113 module_param_named_unsafe(vbt_sdvo_panel_type, i915.vbt_sdvo_panel_type, int, 0400);
114 TUNABLE_INT("drm.i915.vbt_sdvo_panel_type", &i915.vbt_sdvo_panel_type);
115 MODULE_PARM_DESC(vbt_sdvo_panel_type,
116 "Override/Ignore selection of SDVO panel mode in the VBT "
117 "(-2=ignore, -1=auto [default], index in VBT BIOS table)");
119 module_param_named_unsafe(reset, i915.reset, bool, 0600);
120 TUNABLE_INT("drm.i915.reset", &i915.reset);
121 MODULE_PARM_DESC(reset, "Attempt GPU resets (default: true)");
123 module_param_named_unsafe(enable_hangcheck, i915.enable_hangcheck, bool, 0644);
124 MODULE_PARM_DESC(enable_hangcheck,
125 "Periodically check GPU activity for detecting hangs. "
126 "WARNING: Disabling this can cause system wide hangs. "
129 module_param_named_unsafe(enable_ppgtt, i915.enable_ppgtt, int, 0400);
130 TUNABLE_INT("drm.i915.enable_ppgtt", &i915.enable_ppgtt);
131 MODULE_PARM_DESC(enable_ppgtt,
132 "Override PPGTT usage. "
133 "(-1=auto [default], 0=disabled, 1=aliasing, 2=full, 3=full with extended address space)");
135 module_param_named_unsafe(enable_execlists, i915.enable_execlists, int, 0400);
136 TUNABLE_INT("drm.i915.enable_execlists", &i915.enable_execlists);
137 MODULE_PARM_DESC(enable_execlists,
138 "Override execlists usage. "
139 "(-1=auto [default], 0=disabled, 1=enabled)");
141 module_param_named_unsafe(enable_psr, i915.enable_psr, int, 0600);
142 TUNABLE_INT("drm.i915.enable_psr", &i915.enable_psr);
143 MODULE_PARM_DESC(enable_psr, "Enable PSR "
144 "(0=disabled, 1=enabled - link mode chosen per-platform, 2=force link-standby mode, 3=force link-off mode) "
145 "Default: -1 (use per-chip default)");
147 module_param_named_unsafe(preliminary_hw_support, i915.preliminary_hw_support, int, 0400);
148 MODULE_PARM_DESC(preliminary_hw_support,
149 "Enable preliminary hardware support.");
151 module_param_named_unsafe(disable_power_well, i915.disable_power_well, int, 0400);
152 MODULE_PARM_DESC(disable_power_well,
153 "Disable display power wells when possible "
154 "(-1=auto [default], 0=power wells always on, 1=power wells disabled when possible)");
156 module_param_named_unsafe(enable_ips, i915.enable_ips, int, 0600);
157 MODULE_PARM_DESC(enable_ips, "Enable IPS (default: true)");
159 module_param_named(fastboot, i915.fastboot, bool, 0600);
160 MODULE_PARM_DESC(fastboot,
161 "Try to skip unnecessary mode sets at boot time (default: false)");
163 module_param_named_unsafe(prefault_disable, i915.prefault_disable, bool, 0600);
164 MODULE_PARM_DESC(prefault_disable,
165 "Disable page prefaulting for pread/pwrite/reloc (default:false). "
166 "For developers only.");
168 module_param_named_unsafe(load_detect_test, i915.load_detect_test, bool, 0600);
169 MODULE_PARM_DESC(load_detect_test,
170 "Force-enable the VGA load detect code for testing (default:false). "
171 "For developers only.");
173 module_param_named_unsafe(invert_brightness, i915.invert_brightness, int, 0600);
174 TUNABLE_INT("drm.i915.panel_invert_brightness", &i915.invert_brightness);
175 MODULE_PARM_DESC(invert_brightness,
176 "Invert backlight brightness "
177 "(-1 force normal, 0 machine defaults, 1 force inversion), please "
178 "report PCI device ID, subsystem vendor and subsystem device ID "
179 "to dri-devel@lists.freedesktop.org, if your machine needs it. "
180 "It will then be included in an upcoming module version.");
182 module_param_named(disable_display, i915.disable_display, bool, 0400);
183 MODULE_PARM_DESC(disable_display, "Disable display (default: false)");
185 module_param_named_unsafe(enable_cmd_parser, i915.enable_cmd_parser, int, 0600);
186 MODULE_PARM_DESC(enable_cmd_parser,
187 "Enable command parsing (1=enabled [default], 0=disabled)");
189 module_param_named_unsafe(use_mmio_flip, i915.use_mmio_flip, int, 0600);
190 TUNABLE_INT("drm.i915.use_mmio_flip", &i915.use_mmio_flip);
191 MODULE_PARM_DESC(use_mmio_flip,
192 "use MMIO flips (-1=never, 0=driver discretion [default], 1=always)");
194 module_param_named(mmio_debug, i915.mmio_debug, int, 0600);
195 MODULE_PARM_DESC(mmio_debug,
196 "Enable the MMIO debug code for the first N failures (default: off). "
197 "This may negatively affect performance.");
199 module_param_named(verbose_state_checks, i915.verbose_state_checks, bool, 0600);
200 MODULE_PARM_DESC(verbose_state_checks,
201 "Enable verbose logs (ie. WARN_ON()) in case of unexpected hw state conditions.");
203 module_param_named_unsafe(nuclear_pageflip, i915.nuclear_pageflip, bool, 0600);
204 MODULE_PARM_DESC(nuclear_pageflip,
205 "Force atomic modeset functionality; asynchronous mode is not yet supported. (default: false).");
207 /* WA to get away with the default setting in VBT for early platforms.Will be removed */
208 module_param_named_unsafe(edp_vswing, i915.edp_vswing, int, 0400);
209 MODULE_PARM_DESC(edp_vswing,
210 "Ignore/Override vswing pre-emph table selection from VBT "
211 "(0=use value from vbt [default], 1=low power swing(200mV),"
212 "2=default swing(400mV))");
214 module_param_named_unsafe(enable_guc_submission, i915.enable_guc_submission, bool, 0400);
215 MODULE_PARM_DESC(enable_guc_submission, "Enable GuC submission (default:false)");
217 module_param_named(guc_log_level, i915.guc_log_level, int, 0400);
218 MODULE_PARM_DESC(guc_log_level,
219 "GuC firmware logging level (-1:disabled (default), 0-3:enabled)");
221 module_param_named_unsafe(enable_dp_mst, i915.enable_dp_mst, bool, 0600);
222 MODULE_PARM_DESC(enable_dp_mst,
223 "Enable multi-stream transport (MST) for new DisplayPort sinks. (default: true)");
224 module_param_named_unsafe(inject_load_failure, i915.inject_load_failure, uint, 0400);
225 MODULE_PARM_DESC(inject_load_failure,
226 "Force an error after a number of failure check points (0:disabled (default), N:force failure at the Nth failure check point)");