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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 = 1,
53 .verbose_state_checks = 1,
54 .nuclear_pageflip = 0,
56 .enable_guc_loading = 0,
57 .enable_guc_submission = 0,
59 .enable_dp_mst = true,
60 .inject_load_failure = 0,
61 .enable_dpcd_backlight = false,
64 module_param_named(modeset, i915.modeset, int, 0400);
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 MODULE_PARM_DESC(panel_ignore_lid,
71 "Override lid status (0=autodetect, 1=autodetect disabled [default], "
72 "-1=force lid closed, -2=force lid open)");
74 module_param_named_unsafe(semaphores, i915.semaphores, int, 0400);
75 MODULE_PARM_DESC(semaphores,
76 "Use semaphores for inter-ring sync "
77 "(default: -1 (use per-chip defaults))");
79 module_param_named_unsafe(enable_rc6, i915.enable_rc6, int, 0400);
80 MODULE_PARM_DESC(enable_rc6,
81 "Enable power-saving render C-state 6. "
82 "Different stages can be selected via bitmask values "
83 "(0 = disable; 1 = enable rc6; 2 = enable deep rc6; 4 = enable deepest rc6). "
84 "For example, 3 would enable rc6 and deep rc6, and 7 would enable everything. "
85 "default: -1 (use per-chip default)");
87 module_param_named_unsafe(enable_dc, i915.enable_dc, int, 0400);
88 MODULE_PARM_DESC(enable_dc,
89 "Enable power-saving display C-states. "
90 "(-1=auto [default]; 0=disable; 1=up to DC5; 2=up to DC6)");
92 module_param_named_unsafe(enable_fbc, i915.enable_fbc, int, 0600);
93 MODULE_PARM_DESC(enable_fbc,
94 "Enable frame buffer compression for power savings "
95 "(default: -1 (use per-chip default))");
97 module_param_named_unsafe(lvds_channel_mode, i915.lvds_channel_mode, int, 0400);
98 MODULE_PARM_DESC(lvds_channel_mode,
99 "Specify LVDS channel mode "
100 "(0=probe BIOS [default], 1=single-channel, 2=dual-channel)");
102 module_param_named_unsafe(lvds_use_ssc, i915.panel_use_ssc, int, 0600);
103 MODULE_PARM_DESC(lvds_use_ssc,
104 "Use Spread Spectrum Clock with panels [LVDS/eDP] "
105 "(default: auto from VBT)");
107 module_param_named_unsafe(vbt_sdvo_panel_type, i915.vbt_sdvo_panel_type, int, 0400);
108 MODULE_PARM_DESC(vbt_sdvo_panel_type,
109 "Override/Ignore selection of SDVO panel mode in the VBT "
110 "(-2=ignore, -1=auto [default], index in VBT BIOS table)");
112 module_param_named_unsafe(reset, i915.reset, bool, 0600);
113 MODULE_PARM_DESC(reset, "Attempt GPU resets (default: true)");
115 module_param_named_unsafe(enable_hangcheck, i915.enable_hangcheck, bool, 0644);
116 MODULE_PARM_DESC(enable_hangcheck,
117 "Periodically check GPU activity for detecting hangs. "
118 "WARNING: Disabling this can cause system wide hangs. "
121 module_param_named_unsafe(enable_ppgtt, i915.enable_ppgtt, int, 0400);
122 MODULE_PARM_DESC(enable_ppgtt,
123 "Override PPGTT usage. "
124 "(-1=auto [default], 0=disabled, 1=aliasing, 2=full, 3=full with extended address space)");
126 module_param_named_unsafe(enable_execlists, i915.enable_execlists, int, 0400);
127 MODULE_PARM_DESC(enable_execlists,
128 "Override execlists usage. "
129 "(-1=auto [default], 0=disabled, 1=enabled)");
131 module_param_named_unsafe(enable_psr, i915.enable_psr, int, 0600);
132 MODULE_PARM_DESC(enable_psr, "Enable PSR "
133 "(0=disabled, 1=enabled - link mode chosen per-platform, 2=force link-standby mode, 3=force link-off mode) "
134 "Default: -1 (use per-chip default)");
136 module_param_named_unsafe(preliminary_hw_support, i915.preliminary_hw_support, int, 0400);
137 MODULE_PARM_DESC(preliminary_hw_support,
138 "Enable preliminary hardware support.");
140 module_param_named_unsafe(disable_power_well, i915.disable_power_well, int, 0400);
141 MODULE_PARM_DESC(disable_power_well,
142 "Disable display power wells when possible "
143 "(-1=auto [default], 0=power wells always on, 1=power wells disabled when possible)");
145 module_param_named_unsafe(enable_ips, i915.enable_ips, int, 0600);
146 MODULE_PARM_DESC(enable_ips, "Enable IPS (default: true)");
148 module_param_named(fastboot, i915.fastboot, bool, 0600);
149 MODULE_PARM_DESC(fastboot,
150 "Try to skip unnecessary mode sets at boot time (default: false)");
152 module_param_named_unsafe(prefault_disable, i915.prefault_disable, bool, 0600);
153 MODULE_PARM_DESC(prefault_disable,
154 "Disable page prefaulting for pread/pwrite/reloc (default:false). "
155 "For developers only.");
157 module_param_named_unsafe(load_detect_test, i915.load_detect_test, bool, 0600);
158 MODULE_PARM_DESC(load_detect_test,
159 "Force-enable the VGA load detect code for testing (default:false). "
160 "For developers only.");
162 module_param_named_unsafe(invert_brightness, i915.invert_brightness, int, 0600);
163 MODULE_PARM_DESC(invert_brightness,
164 "Invert backlight brightness "
165 "(-1 force normal, 0 machine defaults, 1 force inversion), please "
166 "report PCI device ID, subsystem vendor and subsystem device ID "
167 "to dri-devel@lists.freedesktop.org, if your machine needs it. "
168 "It will then be included in an upcoming module version.");
170 module_param_named(disable_display, i915.disable_display, bool, 0400);
171 MODULE_PARM_DESC(disable_display, "Disable display (default: false)");
173 module_param_named_unsafe(enable_cmd_parser, i915.enable_cmd_parser, int, 0600);
174 MODULE_PARM_DESC(enable_cmd_parser,
175 "Enable command parsing (1=enabled [default], 0=disabled)");
177 module_param_named(mmio_debug, i915.mmio_debug, int, 0600);
178 MODULE_PARM_DESC(mmio_debug,
179 "Enable the MMIO debug code for the first N failures (default: off). "
180 "This may negatively affect performance.");
182 module_param_named(verbose_state_checks, i915.verbose_state_checks, bool, 0600);
183 MODULE_PARM_DESC(verbose_state_checks,
184 "Enable verbose logs (ie. WARN_ON()) in case of unexpected hw state conditions.");
186 module_param_named_unsafe(nuclear_pageflip, i915.nuclear_pageflip, bool, 0600);
187 MODULE_PARM_DESC(nuclear_pageflip,
188 "Force atomic modeset functionality; asynchronous mode is not yet supported. (default: false).");
190 /* WA to get away with the default setting in VBT for early platforms.Will be removed */
191 module_param_named_unsafe(edp_vswing, i915.edp_vswing, int, 0400);
192 MODULE_PARM_DESC(edp_vswing,
193 "Ignore/Override vswing pre-emph table selection from VBT "
194 "(0=use value from vbt [default], 1=low power swing(200mV),"
195 "2=default swing(400mV))");
197 module_param_named_unsafe(enable_guc_loading, i915.enable_guc_loading, int, 0400);
198 MODULE_PARM_DESC(enable_guc_loading,
199 "Enable GuC firmware loading "
200 "(-1=auto, 0=never [default], 1=if available, 2=required)");
202 module_param_named_unsafe(enable_guc_submission, i915.enable_guc_submission, int, 0400);
203 MODULE_PARM_DESC(enable_guc_submission,
204 "Enable GuC submission "
205 "(-1=auto, 0=never [default], 1=if available, 2=required)");
207 module_param_named(guc_log_level, i915.guc_log_level, int, 0400);
208 MODULE_PARM_DESC(guc_log_level,
209 "GuC firmware logging level (-1:disabled (default), 0-3:enabled)");
211 module_param_named_unsafe(enable_dp_mst, i915.enable_dp_mst, bool, 0600);
212 MODULE_PARM_DESC(enable_dp_mst,
213 "Enable multi-stream transport (MST) for new DisplayPort sinks. (default: true)");
214 module_param_named_unsafe(inject_load_failure, i915.inject_load_failure, uint, 0400);
215 MODULE_PARM_DESC(inject_load_failure,
216 "Force an error after a number of failure check points (0:disabled (default), N:force failure at the Nth failure check point)");
217 module_param_named(enable_dpcd_backlight, i915.enable_dpcd_backlight, bool, 0600);
218 MODULE_PARM_DESC(enable_dpcd_backlight,
219 "Enable support for DPCD backlight control (default:false)");