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16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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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_submission
= false,
61 module_param_named(modeset
, i915
.modeset
, int, 0400);
62 MODULE_PARM_DESC(modeset
,
63 "Use kernel modesetting [KMS] (0=disable, "
64 "1=on, -1=force vga console preference [default])");
66 module_param_named_unsafe(panel_ignore_lid
, i915
.panel_ignore_lid
, int, 0600);
67 MODULE_PARM_DESC(panel_ignore_lid
,
68 "Override lid status (0=autodetect, 1=autodetect disabled [default], "
69 "-1=force lid closed, -2=force lid open)");
71 module_param_named_unsafe(semaphores
, i915
.semaphores
, int, 0400);
72 MODULE_PARM_DESC(semaphores
,
73 "Use semaphores for inter-ring sync "
74 "(default: -1 (use per-chip defaults))");
76 module_param_named_unsafe(enable_rc6
, i915
.enable_rc6
, int, 0400);
77 MODULE_PARM_DESC(enable_rc6
,
78 "Enable power-saving render C-state 6. "
79 "Different stages can be selected via bitmask values "
80 "(0 = disable; 1 = enable rc6; 2 = enable deep rc6; 4 = enable deepest rc6). "
81 "For example, 3 would enable rc6 and deep rc6, and 7 would enable everything. "
82 "default: -1 (use per-chip default)");
84 module_param_named_unsafe(enable_dc
, i915
.enable_dc
, int, 0400);
85 MODULE_PARM_DESC(enable_dc
,
86 "Enable power-saving display C-states. "
87 "(-1=auto [default]; 0=disable; 1=up to DC5; 2=up to DC6)");
89 module_param_named_unsafe(enable_fbc
, i915
.enable_fbc
, int, 0600);
90 MODULE_PARM_DESC(enable_fbc
,
91 "Enable frame buffer compression for power savings "
92 "(default: -1 (use per-chip default))");
94 module_param_named_unsafe(lvds_channel_mode
, i915
.lvds_channel_mode
, int, 0400);
95 MODULE_PARM_DESC(lvds_channel_mode
,
96 "Specify LVDS channel mode "
97 "(0=probe BIOS [default], 1=single-channel, 2=dual-channel)");
99 module_param_named_unsafe(lvds_use_ssc
, i915
.panel_use_ssc
, int, 0600);
100 MODULE_PARM_DESC(lvds_use_ssc
,
101 "Use Spread Spectrum Clock with panels [LVDS/eDP] "
102 "(default: auto from VBT)");
104 module_param_named_unsafe(vbt_sdvo_panel_type
, i915
.vbt_sdvo_panel_type
, int, 0400);
105 MODULE_PARM_DESC(vbt_sdvo_panel_type
,
106 "Override/Ignore selection of SDVO panel mode in the VBT "
107 "(-2=ignore, -1=auto [default], index in VBT BIOS table)");
109 module_param_named_unsafe(reset
, i915
.reset
, bool, 0600);
110 MODULE_PARM_DESC(reset
, "Attempt GPU resets (default: true)");
112 module_param_named_unsafe(enable_hangcheck
, i915
.enable_hangcheck
, bool, 0644);
113 MODULE_PARM_DESC(enable_hangcheck
,
114 "Periodically check GPU activity for detecting hangs. "
115 "WARNING: Disabling this can cause system wide hangs. "
118 module_param_named_unsafe(enable_ppgtt
, i915
.enable_ppgtt
, int, 0400);
119 MODULE_PARM_DESC(enable_ppgtt
,
120 "Override PPGTT usage. "
121 "(-1=auto [default], 0=disabled, 1=aliasing, 2=full, 3=full with extended address space)");
123 module_param_named_unsafe(enable_execlists
, i915
.enable_execlists
, int, 0400);
124 MODULE_PARM_DESC(enable_execlists
,
125 "Override execlists usage. "
126 "(-1=auto [default], 0=disabled, 1=enabled)");
128 module_param_named_unsafe(enable_psr
, i915
.enable_psr
, int, 0600);
129 MODULE_PARM_DESC(enable_psr
, "Enable PSR "
130 "(0=disabled, 1=enabled - link mode chosen per-platform, 2=force link-standby mode, 3=force link-off mode) "
131 "Default: -1 (use per-chip default)");
133 module_param_named_unsafe(preliminary_hw_support
, i915
.preliminary_hw_support
, int, 0400);
134 MODULE_PARM_DESC(preliminary_hw_support
,
135 "Enable preliminary hardware support.");
137 module_param_named_unsafe(disable_power_well
, i915
.disable_power_well
, int, 0400);
138 MODULE_PARM_DESC(disable_power_well
,
139 "Disable display power wells when possible "
140 "(-1=auto [default], 0=power wells always on, 1=power wells disabled when possible)");
142 module_param_named_unsafe(enable_ips
, i915
.enable_ips
, int, 0600);
143 MODULE_PARM_DESC(enable_ips
, "Enable IPS (default: true)");
145 module_param_named(fastboot
, i915
.fastboot
, bool, 0600);
146 MODULE_PARM_DESC(fastboot
,
147 "Try to skip unnecessary mode sets at boot time (default: false)");
149 module_param_named_unsafe(prefault_disable
, i915
.prefault_disable
, bool, 0600);
150 MODULE_PARM_DESC(prefault_disable
,
151 "Disable page prefaulting for pread/pwrite/reloc (default:false). "
152 "For developers only.");
154 module_param_named_unsafe(load_detect_test
, i915
.load_detect_test
, bool, 0600);
155 MODULE_PARM_DESC(load_detect_test
,
156 "Force-enable the VGA load detect code for testing (default:false). "
157 "For developers only.");
159 module_param_named_unsafe(invert_brightness
, i915
.invert_brightness
, int, 0600);
160 MODULE_PARM_DESC(invert_brightness
,
161 "Invert backlight brightness "
162 "(-1 force normal, 0 machine defaults, 1 force inversion), please "
163 "report PCI device ID, subsystem vendor and subsystem device ID "
164 "to dri-devel@lists.freedesktop.org, if your machine needs it. "
165 "It will then be included in an upcoming module version.");
167 module_param_named(disable_display
, i915
.disable_display
, bool, 0400);
168 MODULE_PARM_DESC(disable_display
, "Disable display (default: false)");
170 module_param_named_unsafe(enable_cmd_parser
, i915
.enable_cmd_parser
, int, 0600);
171 MODULE_PARM_DESC(enable_cmd_parser
,
172 "Enable command parsing (1=enabled [default], 0=disabled)");
174 module_param_named_unsafe(use_mmio_flip
, i915
.use_mmio_flip
, int, 0600);
175 MODULE_PARM_DESC(use_mmio_flip
,
176 "use MMIO flips (-1=never, 0=driver discretion [default], 1=always)");
178 module_param_named(mmio_debug
, i915
.mmio_debug
, int, 0600);
179 MODULE_PARM_DESC(mmio_debug
,
180 "Enable the MMIO debug code for the first N failures (default: off). "
181 "This may negatively affect performance.");
183 module_param_named(verbose_state_checks
, i915
.verbose_state_checks
, bool, 0600);
184 MODULE_PARM_DESC(verbose_state_checks
,
185 "Enable verbose logs (ie. WARN_ON()) in case of unexpected hw state conditions.");
187 module_param_named_unsafe(nuclear_pageflip
, i915
.nuclear_pageflip
, bool, 0600);
188 MODULE_PARM_DESC(nuclear_pageflip
,
189 "Force atomic modeset functionality; asynchronous mode is not yet supported. (default: false).");
191 /* WA to get away with the default setting in VBT for early platforms.Will be removed */
192 module_param_named_unsafe(edp_vswing
, i915
.edp_vswing
, int, 0400);
193 MODULE_PARM_DESC(edp_vswing
,
194 "Ignore/Override vswing pre-emph table selection from VBT "
195 "(0=use value from vbt [default], 1=low power swing(200mV),"
196 "2=default swing(400mV))");
198 module_param_named_unsafe(enable_guc_submission
, i915
.enable_guc_submission
, bool, 0400);
199 MODULE_PARM_DESC(enable_guc_submission
, "Enable GuC submission (default:false)");
201 module_param_named(guc_log_level
, i915
.guc_log_level
, int, 0400);
202 MODULE_PARM_DESC(guc_log_level
,
203 "GuC firmware logging level (-1:disabled (default), 0-3:enabled)");