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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 TUNABLE_INT("drm.i915.modeset", &i915.modeset);
69 MODULE_PARM_DESC(modeset,
70 "Use kernel modesetting [KMS] (0=disable, "
71 "1=on, -1=force vga console preference [default])");
73 module_param_named_unsafe(panel_ignore_lid, i915.panel_ignore_lid, int, 0600);
74 TUNABLE_INT("drm.i915.panel_ignore_lid", &i915.panel_ignore_lid);
75 MODULE_PARM_DESC(panel_ignore_lid,
76 "Override lid status (0=autodetect, 1=autodetect disabled [default], "
77 "-1=force lid closed, -2=force lid open)");
79 module_param_named_unsafe(semaphores, i915.semaphores, int, 0400);
80 TUNABLE_INT("drm.i915.semaphores", &i915.semaphores);
81 MODULE_PARM_DESC(semaphores,
82 "Use semaphores for inter-ring sync "
83 "(default: -1 (use per-chip defaults))");
85 module_param_named_unsafe(enable_rc6, i915.enable_rc6, int, 0400);
86 TUNABLE_INT("drm.i915.enable_rc6", &i915.enable_rc6);
87 MODULE_PARM_DESC(enable_rc6,
88 "Enable power-saving render C-state 6. "
89 "Different stages can be selected via bitmask values "
90 "(0 = disable; 1 = enable rc6; 2 = enable deep rc6; 4 = enable deepest rc6). "
91 "For example, 3 would enable rc6 and deep rc6, and 7 would enable everything. "
92 "default: -1 (use per-chip default)");
94 module_param_named_unsafe(enable_dc, i915.enable_dc, int, 0400);
95 TUNABLE_INT("drm.i915.enable_dc", &i915.enable_dc);
96 MODULE_PARM_DESC(enable_dc,
97 "Enable power-saving display C-states. "
98 "(-1=auto [default]; 0=disable; 1=up to DC5; 2=up to DC6)");
100 module_param_named_unsafe(enable_fbc, i915.enable_fbc, int, 0600);
101 TUNABLE_INT("drm.i915.enable_fbc", &i915.enable_fbc);
102 MODULE_PARM_DESC(enable_fbc,
103 "Enable frame buffer compression for power savings "
104 "(default: -1 (use per-chip default))");
106 module_param_named_unsafe(lvds_channel_mode, i915.lvds_channel_mode, int, 0400);
107 TUNABLE_INT("drm.i915.lvds_channel_mode", &i915.lvds_channel_mode);
108 MODULE_PARM_DESC(lvds_channel_mode,
109 "Specify LVDS channel mode "
110 "(0=probe BIOS [default], 1=single-channel, 2=dual-channel)");
112 module_param_named_unsafe(lvds_use_ssc, i915.panel_use_ssc, int, 0600);
113 TUNABLE_INT("drm.i915.panel_use_ssc", &i915.panel_use_ssc);
114 MODULE_PARM_DESC(lvds_use_ssc,
115 "Use Spread Spectrum Clock with panels [LVDS/eDP] "
116 "(default: auto from VBT)");
118 module_param_named_unsafe(vbt_sdvo_panel_type, i915.vbt_sdvo_panel_type, int, 0400);
119 TUNABLE_INT("drm.i915.vbt_sdvo_panel_type", &i915.vbt_sdvo_panel_type);
120 MODULE_PARM_DESC(vbt_sdvo_panel_type,
121 "Override/Ignore selection of SDVO panel mode in the VBT "
122 "(-2=ignore, -1=auto [default], index in VBT BIOS table)");
124 module_param_named_unsafe(reset, i915.reset, bool, 0600);
125 TUNABLE_INT("drm.i915.reset", &i915.reset);
126 MODULE_PARM_DESC(reset, "Attempt GPU resets (default: true)");
128 #if IS_ENABLED(CONFIG_DRM_I915_CAPTURE_ERROR)
129 module_param_named(error_capture, i915.error_capture, bool, 0600);
130 MODULE_PARM_DESC(error_capture,
131 "Record the GPU state following a hang. "
132 "This information in /sys/class/drm/card<N>/error is vital for "
133 "triaging and debugging hangs.");
136 module_param_named_unsafe(enable_hangcheck, i915.enable_hangcheck, bool, 0644);
137 MODULE_PARM_DESC(enable_hangcheck,
138 "Periodically check GPU activity for detecting hangs. "
139 "WARNING: Disabling this can cause system wide hangs. "
142 module_param_named_unsafe(enable_ppgtt, i915.enable_ppgtt, int, 0400);
143 TUNABLE_INT("drm.i915.enable_ppgtt", &i915.enable_ppgtt);
144 MODULE_PARM_DESC(enable_ppgtt,
145 "Override PPGTT usage. "
146 "(-1=auto [default], 0=disabled, 1=aliasing, 2=full, 3=full with extended address space)");
148 module_param_named_unsafe(enable_execlists, i915.enable_execlists, int, 0400);
149 TUNABLE_INT("drm.i915.enable_execlists", &i915.enable_execlists);
150 MODULE_PARM_DESC(enable_execlists,
151 "Override execlists usage. "
152 "(-1=auto [default], 0=disabled, 1=enabled)");
154 module_param_named_unsafe(enable_psr, i915.enable_psr, int, 0600);
155 TUNABLE_INT("drm.i915.enable_psr", &i915.enable_psr);
156 MODULE_PARM_DESC(enable_psr, "Enable PSR "
157 "(0=disabled, 1=enabled - link mode chosen per-platform, 2=force link-standby mode, 3=force link-off mode) "
158 "Default: -1 (use per-chip default)");
160 module_param_named_unsafe(preliminary_hw_support, i915.preliminary_hw_support, int, 0400);
161 MODULE_PARM_DESC(preliminary_hw_support,
162 "Enable preliminary hardware support.");
164 module_param_named_unsafe(disable_power_well, i915.disable_power_well, int, 0400);
165 MODULE_PARM_DESC(disable_power_well,
166 "Disable display power wells when possible "
167 "(-1=auto [default], 0=power wells always on, 1=power wells disabled when possible)");
169 module_param_named_unsafe(enable_ips, i915.enable_ips, int, 0600);
170 MODULE_PARM_DESC(enable_ips, "Enable IPS (default: true)");
172 module_param_named(fastboot, i915.fastboot, bool, 0600);
173 MODULE_PARM_DESC(fastboot,
174 "Try to skip unnecessary mode sets at boot time (default: false)");
176 module_param_named_unsafe(prefault_disable, i915.prefault_disable, bool, 0600);
177 MODULE_PARM_DESC(prefault_disable,
178 "Disable page prefaulting for pread/pwrite/reloc (default:false). "
179 "For developers only.");
181 module_param_named_unsafe(load_detect_test, i915.load_detect_test, bool, 0600);
182 MODULE_PARM_DESC(load_detect_test,
183 "Force-enable the VGA load detect code for testing (default:false). "
184 "For developers only.");
186 module_param_named_unsafe(force_reset_modeset_test, i915.force_reset_modeset_test, bool, 0600);
187 MODULE_PARM_DESC(force_reset_modeset_test,
188 "Force a modeset during gpu reset for testing (default:false). "
189 "For developers only.");
191 module_param_named_unsafe(invert_brightness, i915.invert_brightness, int, 0600);
192 TUNABLE_INT("drm.i915.panel_invert_brightness", &i915.invert_brightness);
193 MODULE_PARM_DESC(invert_brightness,
194 "Invert backlight brightness "
195 "(-1 force normal, 0 machine defaults, 1 force inversion), please "
196 "report PCI device ID, subsystem vendor and subsystem device ID "
197 "to dri-devel@lists.freedesktop.org, if your machine needs it. "
198 "It will then be included in an upcoming module version.");
200 module_param_named(disable_display, i915.disable_display, bool, 0400);
201 MODULE_PARM_DESC(disable_display, "Disable display (default: false)");
203 module_param_named_unsafe(enable_cmd_parser, i915.enable_cmd_parser, int, 0600);
204 MODULE_PARM_DESC(enable_cmd_parser,
205 "Enable command parsing (1=enabled [default], 0=disabled)");
207 module_param_named_unsafe(use_mmio_flip, i915.use_mmio_flip, int, 0600);
208 TUNABLE_INT("drm.i915.use_mmio_flip", &i915.use_mmio_flip);
209 MODULE_PARM_DESC(use_mmio_flip,
210 "use MMIO flips (-1=never, 0=driver discretion [default], 1=always)");
212 module_param_named(mmio_debug, i915.mmio_debug, int, 0600);
213 MODULE_PARM_DESC(mmio_debug,
214 "Enable the MMIO debug code for the first N failures (default: off). "
215 "This may negatively affect performance.");
217 module_param_named(verbose_state_checks, i915.verbose_state_checks, bool, 0600);
218 MODULE_PARM_DESC(verbose_state_checks,
219 "Enable verbose logs (ie. WARN_ON()) in case of unexpected hw state conditions.");
221 module_param_named_unsafe(nuclear_pageflip, i915.nuclear_pageflip, bool, 0600);
222 MODULE_PARM_DESC(nuclear_pageflip,
223 "Force atomic modeset functionality; asynchronous mode is not yet supported. (default: false).");
225 /* WA to get away with the default setting in VBT for early platforms.Will be removed */
226 module_param_named_unsafe(edp_vswing, i915.edp_vswing, int, 0400);
227 MODULE_PARM_DESC(edp_vswing,
228 "Ignore/Override vswing pre-emph table selection from VBT "
229 "(0=use value from vbt [default], 1=low power swing(200mV),"
230 "2=default swing(400mV))");
232 module_param_named_unsafe(enable_guc_loading, i915.enable_guc_loading, int, 0400);
233 MODULE_PARM_DESC(enable_guc_loading,
234 "Enable GuC firmware loading "
235 "(-1=auto, 0=never [default], 1=if available, 2=required)");
237 module_param_named_unsafe(enable_guc_submission, i915.enable_guc_submission, int, 0400);
238 MODULE_PARM_DESC(enable_guc_submission,
239 "Enable GuC submission "
240 "(-1=auto, 0=never [default], 1=if available, 2=required)");
242 module_param_named(guc_log_level, i915.guc_log_level, int, 0400);
243 MODULE_PARM_DESC(guc_log_level,
244 "GuC firmware logging level (-1:disabled (default), 0-3:enabled)");
246 module_param_named_unsafe(enable_dp_mst, i915.enable_dp_mst, bool, 0600);
247 MODULE_PARM_DESC(enable_dp_mst,
248 "Enable multi-stream transport (MST) for new DisplayPort sinks. (default: true)");
249 module_param_named_unsafe(inject_load_failure, i915.inject_load_failure, uint, 0400);
250 MODULE_PARM_DESC(inject_load_failure,
251 "Force an error after a number of failure check points (0:disabled (default), N:force failure at the Nth failure check point)");
252 module_param_named(enable_dpcd_backlight, i915.enable_dpcd_backlight, bool, 0600);
253 MODULE_PARM_DESC(enable_dpcd_backlight,
254 "Enable support for DPCD backlight control (default:false)");
256 module_param_named(enable_gvt, i915.enable_gvt, bool, 0400);
257 MODULE_PARM_DESC(enable_gvt,
258 "Enable support for Intel GVT-g graphics virtualization host support(default:false)");