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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 .alpha_support = IS_ENABLED(CONFIG_DRM_I915_ALPHA_SUPPORT),
43 .disable_power_well = -1,
46 .prefault_disable = 0,
47 .load_detect_test = 0,
48 .force_reset_modeset_test = 0,
50 .error_capture = true,
51 .invert_brightness = 0,
53 .enable_cmd_parser = true,
56 .verbose_state_checks = 1,
57 .nuclear_pageflip = 0,
59 .enable_guc_loading = 0,
60 .enable_guc_submission = 0,
62 .guc_firmware_path = NULL,
63 .huc_firmware_path = NULL,
64 .enable_dp_mst = true,
65 .inject_load_failure = 0,
66 .enable_dpcd_backlight = false,
70 module_param_named(modeset, i915.modeset, int, 0400);
71 MODULE_PARM_DESC(modeset,
72 "Use kernel modesetting [KMS] (0=disable, "
73 "1=on, -1=force vga console preference [default])");
75 module_param_named_unsafe(panel_ignore_lid, i915.panel_ignore_lid, int, 0600);
76 MODULE_PARM_DESC(panel_ignore_lid,
77 "Override lid status (0=autodetect, 1=autodetect disabled [default], "
78 "-1=force lid closed, -2=force lid open)");
80 module_param_named_unsafe(semaphores, i915.semaphores, int, 0400);
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 MODULE_PARM_DESC(enable_rc6,
87 "Enable power-saving render C-state 6. "
88 "Different stages can be selected via bitmask values "
89 "(0 = disable; 1 = enable rc6; 2 = enable deep rc6; 4 = enable deepest rc6). "
90 "For example, 3 would enable rc6 and deep rc6, and 7 would enable everything. "
91 "default: -1 (use per-chip default)");
93 module_param_named_unsafe(enable_dc, i915.enable_dc, int, 0400);
94 MODULE_PARM_DESC(enable_dc,
95 "Enable power-saving display C-states. "
96 "(-1=auto [default]; 0=disable; 1=up to DC5; 2=up to DC6)");
98 module_param_named_unsafe(enable_fbc, i915.enable_fbc, int, 0600);
99 MODULE_PARM_DESC(enable_fbc,
100 "Enable frame buffer compression for power savings "
101 "(default: -1 (use per-chip default))");
103 module_param_named_unsafe(lvds_channel_mode, i915.lvds_channel_mode, int, 0400);
104 MODULE_PARM_DESC(lvds_channel_mode,
105 "Specify LVDS channel mode "
106 "(0=probe BIOS [default], 1=single-channel, 2=dual-channel)");
108 module_param_named_unsafe(lvds_use_ssc, i915.panel_use_ssc, int, 0600);
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 MODULE_PARM_DESC(vbt_sdvo_panel_type,
115 "Override/Ignore selection of SDVO panel mode in the VBT "
116 "(-2=ignore, -1=auto [default], index in VBT BIOS table)");
118 module_param_named_unsafe(reset, i915.reset, int, 0600);
119 MODULE_PARM_DESC(reset, "Attempt GPU resets (0=disabled, 1=full gpu reset, 2=engine reset [default])");
121 module_param_named_unsafe(vbt_firmware, i915.vbt_firmware, charp, 0400);
122 MODULE_PARM_DESC(vbt_firmware,
123 "Load VBT from specified file under /lib/firmware");
125 #if IS_ENABLED(CONFIG_DRM_I915_CAPTURE_ERROR)
126 module_param_named(error_capture, i915.error_capture, bool, 0600);
127 MODULE_PARM_DESC(error_capture,
128 "Record the GPU state following a hang. "
129 "This information in /sys/class/drm/card<N>/error is vital for "
130 "triaging and debugging hangs.");
133 module_param_named_unsafe(enable_hangcheck, i915.enable_hangcheck, bool, 0644);
134 MODULE_PARM_DESC(enable_hangcheck,
135 "Periodically check GPU activity for detecting hangs. "
136 "WARNING: Disabling this can cause system wide hangs. "
139 module_param_named_unsafe(enable_ppgtt, i915.enable_ppgtt, int, 0400);
140 MODULE_PARM_DESC(enable_ppgtt,
141 "Override PPGTT usage. "
142 "(-1=auto [default], 0=disabled, 1=aliasing, 2=full, 3=full with extended address space)");
144 module_param_named_unsafe(enable_execlists, i915.enable_execlists, int, 0400);
145 MODULE_PARM_DESC(enable_execlists,
146 "Override execlists usage. "
147 "(-1=auto [default], 0=disabled, 1=enabled)");
149 module_param_named_unsafe(enable_psr, i915.enable_psr, int, 0600);
150 MODULE_PARM_DESC(enable_psr, "Enable PSR "
151 "(0=disabled, 1=enabled - link mode chosen per-platform, 2=force link-standby mode, 3=force link-off mode) "
152 "Default: -1 (use per-chip default)");
154 module_param_named_unsafe(alpha_support, i915.alpha_support, bool, 0400);
155 MODULE_PARM_DESC(alpha_support,
156 "Enable alpha quality driver support for latest hardware. "
157 "See also CONFIG_DRM_I915_ALPHA_SUPPORT.");
159 module_param_named_unsafe(disable_power_well, i915.disable_power_well, int, 0400);
160 MODULE_PARM_DESC(disable_power_well,
161 "Disable display power wells when possible "
162 "(-1=auto [default], 0=power wells always on, 1=power wells disabled when possible)");
164 module_param_named_unsafe(enable_ips, i915.enable_ips, int, 0600);
165 MODULE_PARM_DESC(enable_ips, "Enable IPS (default: true)");
167 module_param_named(fastboot, i915.fastboot, bool, 0600);
168 MODULE_PARM_DESC(fastboot,
169 "Try to skip unnecessary mode sets at boot time (default: false)");
171 module_param_named_unsafe(prefault_disable, i915.prefault_disable, bool, 0600);
172 MODULE_PARM_DESC(prefault_disable,
173 "Disable page prefaulting for pread/pwrite/reloc (default:false). "
174 "For developers only.");
176 module_param_named_unsafe(load_detect_test, i915.load_detect_test, bool, 0600);
177 MODULE_PARM_DESC(load_detect_test,
178 "Force-enable the VGA load detect code for testing (default:false). "
179 "For developers only.");
181 module_param_named_unsafe(force_reset_modeset_test, i915.force_reset_modeset_test, bool, 0600);
182 MODULE_PARM_DESC(force_reset_modeset_test,
183 "Force a modeset during gpu reset for testing (default:false). "
184 "For developers only.");
186 module_param_named_unsafe(invert_brightness, i915.invert_brightness, int, 0600);
187 MODULE_PARM_DESC(invert_brightness,
188 "Invert backlight brightness "
189 "(-1 force normal, 0 machine defaults, 1 force inversion), please "
190 "report PCI device ID, subsystem vendor and subsystem device ID "
191 "to dri-devel@lists.freedesktop.org, if your machine needs it. "
192 "It will then be included in an upcoming module version.");
194 module_param_named(disable_display, i915.disable_display, bool, 0400);
195 MODULE_PARM_DESC(disable_display, "Disable display (default: false)");
197 module_param_named_unsafe(enable_cmd_parser, i915.enable_cmd_parser, bool, 0400);
198 MODULE_PARM_DESC(enable_cmd_parser,
199 "Enable command parsing (true=enabled [default], false=disabled)");
201 module_param_named_unsafe(use_mmio_flip, i915.use_mmio_flip, int, 0600);
202 MODULE_PARM_DESC(use_mmio_flip,
203 "use MMIO flips (-1=never, 0=driver discretion [default], 1=always)");
205 module_param_named(mmio_debug, i915.mmio_debug, int, 0600);
206 MODULE_PARM_DESC(mmio_debug,
207 "Enable the MMIO debug code for the first N failures (default: off). "
208 "This may negatively affect performance.");
210 module_param_named(verbose_state_checks, i915.verbose_state_checks, bool, 0600);
211 MODULE_PARM_DESC(verbose_state_checks,
212 "Enable verbose logs (ie. WARN_ON()) in case of unexpected hw state conditions.");
214 module_param_named_unsafe(nuclear_pageflip, i915.nuclear_pageflip, bool, 0400);
215 MODULE_PARM_DESC(nuclear_pageflip,
216 "Force enable atomic functionality on platforms that don't have full support yet.");
218 /* WA to get away with the default setting in VBT for early platforms.Will be removed */
219 module_param_named_unsafe(edp_vswing, i915.edp_vswing, int, 0400);
220 MODULE_PARM_DESC(edp_vswing,
221 "Ignore/Override vswing pre-emph table selection from VBT "
222 "(0=use value from vbt [default], 1=low power swing(200mV),"
223 "2=default swing(400mV))");
225 module_param_named_unsafe(enable_guc_loading, i915.enable_guc_loading, int, 0400);
226 MODULE_PARM_DESC(enable_guc_loading,
227 "Enable GuC firmware loading "
228 "(-1=auto, 0=never [default], 1=if available, 2=required)");
230 module_param_named_unsafe(enable_guc_submission, i915.enable_guc_submission, int, 0400);
231 MODULE_PARM_DESC(enable_guc_submission,
232 "Enable GuC submission "
233 "(-1=auto, 0=never [default], 1=if available, 2=required)");
235 module_param_named(guc_log_level, i915.guc_log_level, int, 0400);
236 MODULE_PARM_DESC(guc_log_level,
237 "GuC firmware logging level (-1:disabled (default), 0-3:enabled)");
239 module_param_named_unsafe(guc_firmware_path, i915.guc_firmware_path, charp, 0400);
240 MODULE_PARM_DESC(guc_firmware_path,
241 "GuC firmware path to use instead of the default one");
243 module_param_named_unsafe(huc_firmware_path, i915.huc_firmware_path, charp, 0400);
244 MODULE_PARM_DESC(huc_firmware_path,
245 "HuC firmware path to use instead of the default one");
247 module_param_named_unsafe(enable_dp_mst, i915.enable_dp_mst, bool, 0600);
248 MODULE_PARM_DESC(enable_dp_mst,
249 "Enable multi-stream transport (MST) for new DisplayPort sinks. (default: true)");
250 module_param_named_unsafe(inject_load_failure, i915.inject_load_failure, uint, 0400);
251 MODULE_PARM_DESC(inject_load_failure,
252 "Force an error after a number of failure check points (0:disabled (default), N:force failure at the Nth failure check point)");
253 module_param_named(enable_dpcd_backlight, i915.enable_dpcd_backlight, bool, 0600);
254 MODULE_PARM_DESC(enable_dpcd_backlight,
255 "Enable support for DPCD backlight control (default:false)");
257 module_param_named(enable_gvt, i915.enable_gvt, bool, 0400);
258 MODULE_PARM_DESC(enable_gvt,
259 "Enable support for Intel GVT-g graphics virtualization host support(default:false)");