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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,
54 .verbose_state_checks = 1,
55 .nuclear_pageflip = 0,
57 .enable_guc_loading = 0,
58 .enable_guc_submission = 0,
60 .enable_dp_mst = true,
61 .inject_load_failure = 0,
62 .enable_dpcd_backlight = false,
65 module_param_named(modeset, i915.modeset, int, 0400);
66 MODULE_PARM_DESC(modeset,
67 "Use kernel modesetting [KMS] (0=disable, "
68 "1=on, -1=force vga console preference [default])");
70 module_param_named_unsafe(panel_ignore_lid, i915.panel_ignore_lid, int, 0600);
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 MODULE_PARM_DESC(semaphores,
77 "Use semaphores for inter-ring sync "
78 "(default: -1 (use per-chip defaults))");
80 module_param_named_unsafe(enable_rc6, i915.enable_rc6, int, 0400);
81 MODULE_PARM_DESC(enable_rc6,
82 "Enable power-saving render C-state 6. "
83 "Different stages can be selected via bitmask values "
84 "(0 = disable; 1 = enable rc6; 2 = enable deep rc6; 4 = enable deepest rc6). "
85 "For example, 3 would enable rc6 and deep rc6, and 7 would enable everything. "
86 "default: -1 (use per-chip default)");
88 module_param_named_unsafe(enable_dc, i915.enable_dc, int, 0400);
89 MODULE_PARM_DESC(enable_dc,
90 "Enable power-saving display C-states. "
91 "(-1=auto [default]; 0=disable; 1=up to DC5; 2=up to DC6)");
93 module_param_named_unsafe(enable_fbc, i915.enable_fbc, int, 0600);
94 MODULE_PARM_DESC(enable_fbc,
95 "Enable frame buffer compression for power savings "
96 "(default: -1 (use per-chip default))");
98 module_param_named_unsafe(lvds_channel_mode, i915.lvds_channel_mode, int, 0400);
99 MODULE_PARM_DESC(lvds_channel_mode,
100 "Specify LVDS channel mode "
101 "(0=probe BIOS [default], 1=single-channel, 2=dual-channel)");
103 module_param_named_unsafe(lvds_use_ssc, i915.panel_use_ssc, int, 0600);
104 MODULE_PARM_DESC(lvds_use_ssc,
105 "Use Spread Spectrum Clock with panels [LVDS/eDP] "
106 "(default: auto from VBT)");
108 module_param_named_unsafe(vbt_sdvo_panel_type, i915.vbt_sdvo_panel_type, int, 0400);
109 MODULE_PARM_DESC(vbt_sdvo_panel_type,
110 "Override/Ignore selection of SDVO panel mode in the VBT "
111 "(-2=ignore, -1=auto [default], index in VBT BIOS table)");
113 module_param_named_unsafe(reset, i915.reset, bool, 0600);
114 MODULE_PARM_DESC(reset, "Attempt GPU resets (default: true)");
116 module_param_named_unsafe(enable_hangcheck, i915.enable_hangcheck, bool, 0644);
117 MODULE_PARM_DESC(enable_hangcheck,
118 "Periodically check GPU activity for detecting hangs. "
119 "WARNING: Disabling this can cause system wide hangs. "
122 module_param_named_unsafe(enable_ppgtt, i915.enable_ppgtt, int, 0400);
123 MODULE_PARM_DESC(enable_ppgtt,
124 "Override PPGTT usage. "
125 "(-1=auto [default], 0=disabled, 1=aliasing, 2=full, 3=full with extended address space)");
127 module_param_named_unsafe(enable_execlists, i915.enable_execlists, int, 0400);
128 MODULE_PARM_DESC(enable_execlists,
129 "Override execlists usage. "
130 "(-1=auto [default], 0=disabled, 1=enabled)");
132 module_param_named_unsafe(enable_psr, i915.enable_psr, int, 0600);
133 MODULE_PARM_DESC(enable_psr, "Enable PSR "
134 "(0=disabled, 1=enabled - link mode chosen per-platform, 2=force link-standby mode, 3=force link-off mode) "
135 "Default: -1 (use per-chip default)");
137 module_param_named_unsafe(preliminary_hw_support, i915.preliminary_hw_support, int, 0400);
138 MODULE_PARM_DESC(preliminary_hw_support,
139 "Enable preliminary hardware support.");
141 module_param_named_unsafe(disable_power_well, i915.disable_power_well, int, 0400);
142 MODULE_PARM_DESC(disable_power_well,
143 "Disable display power wells when possible "
144 "(-1=auto [default], 0=power wells always on, 1=power wells disabled when possible)");
146 module_param_named_unsafe(enable_ips, i915.enable_ips, int, 0600);
147 MODULE_PARM_DESC(enable_ips, "Enable IPS (default: true)");
149 module_param_named(fastboot, i915.fastboot, bool, 0600);
150 MODULE_PARM_DESC(fastboot,
151 "Try to skip unnecessary mode sets at boot time (default: false)");
153 module_param_named_unsafe(prefault_disable, i915.prefault_disable, bool, 0600);
154 MODULE_PARM_DESC(prefault_disable,
155 "Disable page prefaulting for pread/pwrite/reloc (default:false). "
156 "For developers only.");
158 module_param_named_unsafe(load_detect_test, i915.load_detect_test, bool, 0600);
159 MODULE_PARM_DESC(load_detect_test,
160 "Force-enable the VGA load detect code for testing (default:false). "
161 "For developers only.");
163 module_param_named_unsafe(invert_brightness, i915.invert_brightness, int, 0600);
164 MODULE_PARM_DESC(invert_brightness,
165 "Invert backlight brightness "
166 "(-1 force normal, 0 machine defaults, 1 force inversion), please "
167 "report PCI device ID, subsystem vendor and subsystem device ID "
168 "to dri-devel@lists.freedesktop.org, if your machine needs it. "
169 "It will then be included in an upcoming module version.");
171 module_param_named(disable_display, i915.disable_display, bool, 0400);
172 MODULE_PARM_DESC(disable_display, "Disable display (default: false)");
174 module_param_named_unsafe(enable_cmd_parser, i915.enable_cmd_parser, int, 0600);
175 MODULE_PARM_DESC(enable_cmd_parser,
176 "Enable command parsing (1=enabled [default], 0=disabled)");
178 module_param_named_unsafe(use_mmio_flip, i915.use_mmio_flip, int, 0600);
179 MODULE_PARM_DESC(use_mmio_flip,
180 "use MMIO flips (-1=never, 0=driver discretion [default], 1=always)");
182 module_param_named(mmio_debug, i915.mmio_debug, int, 0600);
183 MODULE_PARM_DESC(mmio_debug,
184 "Enable the MMIO debug code for the first N failures (default: off). "
185 "This may negatively affect performance.");
187 module_param_named(verbose_state_checks, i915.verbose_state_checks, bool, 0600);
188 MODULE_PARM_DESC(verbose_state_checks,
189 "Enable verbose logs (ie. WARN_ON()) in case of unexpected hw state conditions.");
191 module_param_named_unsafe(nuclear_pageflip, i915.nuclear_pageflip, bool, 0600);
192 MODULE_PARM_DESC(nuclear_pageflip,
193 "Force atomic modeset functionality; asynchronous mode is not yet supported. (default: false).");
195 /* WA to get away with the default setting in VBT for early platforms.Will be removed */
196 module_param_named_unsafe(edp_vswing, i915.edp_vswing, int, 0400);
197 MODULE_PARM_DESC(edp_vswing,
198 "Ignore/Override vswing pre-emph table selection from VBT "
199 "(0=use value from vbt [default], 1=low power swing(200mV),"
200 "2=default swing(400mV))");
202 module_param_named_unsafe(enable_guc_loading, i915.enable_guc_loading, int, 0400);
203 MODULE_PARM_DESC(enable_guc_loading,
204 "Enable GuC firmware loading "
205 "(-1=auto, 0=never [default], 1=if available, 2=required)");
207 module_param_named_unsafe(enable_guc_submission, i915.enable_guc_submission, int, 0400);
208 MODULE_PARM_DESC(enable_guc_submission,
209 "Enable GuC submission "
210 "(-1=auto, 0=never [default], 1=if available, 2=required)");
212 module_param_named(guc_log_level, i915.guc_log_level, int, 0400);
213 MODULE_PARM_DESC(guc_log_level,
214 "GuC firmware logging level (-1:disabled (default), 0-3:enabled)");
216 module_param_named_unsafe(enable_dp_mst, i915.enable_dp_mst, bool, 0600);
217 MODULE_PARM_DESC(enable_dp_mst,
218 "Enable multi-stream transport (MST) for new DisplayPort sinks. (default: true)");
219 module_param_named_unsafe(inject_load_failure, i915.inject_load_failure, uint, 0400);
220 MODULE_PARM_DESC(inject_load_failure,
221 "Force an error after a number of failure check points (0:disabled (default), N:force failure at the Nth failure check point)");
222 module_param_named(enable_dpcd_backlight, i915.enable_dpcd_backlight, bool, 0600);
223 MODULE_PARM_DESC(enable_dpcd_backlight,
224 "Enable support for DPCD backlight control (default:false)");