xref: /openbmc/linux/drivers/gpu/drm/i915/i915_params.c (revision a2cce7a9)
1 /*
2  * Copyright © 2014 Intel Corporation
3  *
4  * Permission is hereby granted, free of charge, to any person obtaining a
5  * copy of this software and associated documentation files (the
6  * "Software"), to deal in the Software without restriction, including
7  * without limitation the rights to use, copy, modify, merge, publish,
8  * distribute, sub license, and/or sell copies of the Software, and to
9  * permit persons to whom the Software is furnished to do so, subject to
10  * the following conditions:
11  *
12  * The above copyright notice and this permission notice (including the
13  * next paragraph) shall be included in all copies or substantial portions
14  * of the Software.
15  *
16  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
17  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
19  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
20  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
21  * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
22  * IN THE SOFTWARE.
23  */
24 
25 #include "i915_drv.h"
26 
27 struct i915_params i915 __read_mostly = {
28 	.modeset = -1,
29 	.panel_ignore_lid = 1,
30 	.semaphores = -1,
31 	.lvds_channel_mode = 0,
32 	.panel_use_ssc = -1,
33 	.vbt_sdvo_panel_type = -1,
34 	.enable_rc6 = -1,
35 	.enable_fbc = -1,
36 	.enable_execlists = -1,
37 	.enable_hangcheck = true,
38 	.enable_ppgtt = -1,
39 	.enable_psr = 0,
40 	.preliminary_hw_support = IS_ENABLED(CONFIG_DRM_I915_PRELIMINARY_HW_SUPPORT),
41 	.disable_power_well = 1,
42 	.enable_ips = 1,
43 	.fastboot = 0,
44 	.prefault_disable = 0,
45 	.load_detect_test = 0,
46 	.reset = true,
47 	.invert_brightness = 0,
48 	.disable_display = 0,
49 	.enable_cmd_parser = 1,
50 	.disable_vtd_wa = 0,
51 	.use_mmio_flip = 0,
52 	.mmio_debug = 0,
53 	.verbose_state_checks = 1,
54 	.edp_vswing = 0,
55 	.enable_guc_submission = false,
56 	.guc_log_level = -1,
57 };
58 
59 module_param_named(modeset, i915.modeset, int, 0400);
60 MODULE_PARM_DESC(modeset,
61 	"Use kernel modesetting [KMS] (0=disable, "
62 	"1=on, -1=force vga console preference [default])");
63 
64 module_param_named(panel_ignore_lid, i915.panel_ignore_lid, int, 0600);
65 MODULE_PARM_DESC(panel_ignore_lid,
66 	"Override lid status (0=autodetect, 1=autodetect disabled [default], "
67 	"-1=force lid closed, -2=force lid open)");
68 
69 module_param_named_unsafe(semaphores, i915.semaphores, int, 0400);
70 MODULE_PARM_DESC(semaphores,
71 	"Use semaphores for inter-ring sync "
72 	"(default: -1 (use per-chip defaults))");
73 
74 module_param_named_unsafe(enable_rc6, i915.enable_rc6, int, 0400);
75 MODULE_PARM_DESC(enable_rc6,
76 	"Enable power-saving render C-state 6. "
77 	"Different stages can be selected via bitmask values "
78 	"(0 = disable; 1 = enable rc6; 2 = enable deep rc6; 4 = enable deepest rc6). "
79 	"For example, 3 would enable rc6 and deep rc6, and 7 would enable everything. "
80 	"default: -1 (use per-chip default)");
81 
82 module_param_named_unsafe(enable_fbc, i915.enable_fbc, int, 0600);
83 MODULE_PARM_DESC(enable_fbc,
84 	"Enable frame buffer compression for power savings "
85 	"(default: -1 (use per-chip default))");
86 
87 module_param_named(lvds_channel_mode, i915.lvds_channel_mode, int, 0600);
88 MODULE_PARM_DESC(lvds_channel_mode,
89 	 "Specify LVDS channel mode "
90 	 "(0=probe BIOS [default], 1=single-channel, 2=dual-channel)");
91 
92 module_param_named(lvds_use_ssc, i915.panel_use_ssc, int, 0600);
93 MODULE_PARM_DESC(lvds_use_ssc,
94 	"Use Spread Spectrum Clock with panels [LVDS/eDP] "
95 	"(default: auto from VBT)");
96 
97 module_param_named(vbt_sdvo_panel_type, i915.vbt_sdvo_panel_type, int, 0600);
98 MODULE_PARM_DESC(vbt_sdvo_panel_type,
99 	"Override/Ignore selection of SDVO panel mode in the VBT "
100 	"(-2=ignore, -1=auto [default], index in VBT BIOS table)");
101 
102 module_param_named_unsafe(reset, i915.reset, bool, 0600);
103 MODULE_PARM_DESC(reset, "Attempt GPU resets (default: true)");
104 
105 module_param_named(enable_hangcheck, i915.enable_hangcheck, bool, 0644);
106 MODULE_PARM_DESC(enable_hangcheck,
107 	"Periodically check GPU activity for detecting hangs. "
108 	"WARNING: Disabling this can cause system wide hangs. "
109 	"(default: true)");
110 
111 module_param_named_unsafe(enable_ppgtt, i915.enable_ppgtt, int, 0400);
112 MODULE_PARM_DESC(enable_ppgtt,
113 	"Override PPGTT usage. "
114 	"(-1=auto [default], 0=disabled, 1=aliasing, 2=full)");
115 
116 module_param_named(enable_execlists, i915.enable_execlists, int, 0400);
117 MODULE_PARM_DESC(enable_execlists,
118 	"Override execlists usage. "
119 	"(-1=auto [default], 0=disabled, 1=enabled)");
120 
121 module_param_named(enable_psr, i915.enable_psr, int, 0600);
122 MODULE_PARM_DESC(enable_psr, "Enable PSR (default: false)");
123 
124 module_param_named(preliminary_hw_support, i915.preliminary_hw_support, int, 0600);
125 MODULE_PARM_DESC(preliminary_hw_support,
126 	"Enable preliminary hardware support.");
127 
128 module_param_named(disable_power_well, i915.disable_power_well, int, 0600);
129 MODULE_PARM_DESC(disable_power_well,
130 	"Disable the power well when possible (default: true)");
131 
132 module_param_named(enable_ips, i915.enable_ips, int, 0600);
133 MODULE_PARM_DESC(enable_ips, "Enable IPS (default: true)");
134 
135 module_param_named(fastboot, i915.fastboot, bool, 0600);
136 MODULE_PARM_DESC(fastboot,
137 	"Try to skip unnecessary mode sets at boot time (default: false)");
138 
139 module_param_named_unsafe(prefault_disable, i915.prefault_disable, bool, 0600);
140 MODULE_PARM_DESC(prefault_disable,
141 	"Disable page prefaulting for pread/pwrite/reloc (default:false). "
142 	"For developers only.");
143 
144 module_param_named_unsafe(load_detect_test, i915.load_detect_test, bool, 0600);
145 MODULE_PARM_DESC(load_detect_test,
146 	"Force-enable the VGA load detect code for testing (default:false). "
147 	"For developers only.");
148 
149 module_param_named(invert_brightness, i915.invert_brightness, int, 0600);
150 MODULE_PARM_DESC(invert_brightness,
151 	"Invert backlight brightness "
152 	"(-1 force normal, 0 machine defaults, 1 force inversion), please "
153 	"report PCI device ID, subsystem vendor and subsystem device ID "
154 	"to dri-devel@lists.freedesktop.org, if your machine needs it. "
155 	"It will then be included in an upcoming module version.");
156 
157 module_param_named(disable_display, i915.disable_display, bool, 0600);
158 MODULE_PARM_DESC(disable_display, "Disable display (default: false)");
159 
160 module_param_named(disable_vtd_wa, i915.disable_vtd_wa, bool, 0600);
161 MODULE_PARM_DESC(disable_vtd_wa, "Disable all VT-d workarounds (default: false)");
162 
163 module_param_named(enable_cmd_parser, i915.enable_cmd_parser, int, 0600);
164 MODULE_PARM_DESC(enable_cmd_parser,
165 		 "Enable command parsing (1=enabled [default], 0=disabled)");
166 
167 module_param_named(use_mmio_flip, i915.use_mmio_flip, int, 0600);
168 MODULE_PARM_DESC(use_mmio_flip,
169 		 "use MMIO flips (-1=never, 0=driver discretion [default], 1=always)");
170 
171 module_param_named(mmio_debug, i915.mmio_debug, int, 0600);
172 MODULE_PARM_DESC(mmio_debug,
173 	"Enable the MMIO debug code for the first N failures (default: off). "
174 	"This may negatively affect performance.");
175 
176 module_param_named(verbose_state_checks, i915.verbose_state_checks, bool, 0600);
177 MODULE_PARM_DESC(verbose_state_checks,
178 	"Enable verbose logs (ie. WARN_ON()) in case of unexpected hw state conditions.");
179 
180 /* WA to get away with the default setting in VBT for early platforms.Will be removed */
181 module_param_named_unsafe(edp_vswing, i915.edp_vswing, int, 0400);
182 MODULE_PARM_DESC(edp_vswing,
183 		 "Ignore/Override vswing pre-emph table selection from VBT "
184 		 "(0=use value from vbt [default], 1=low power swing(200mV),"
185 		 "2=default swing(400mV))");
186 
187 module_param_named_unsafe(enable_guc_submission, i915.enable_guc_submission, bool, 0400);
188 MODULE_PARM_DESC(enable_guc_submission, "Enable GuC submission (default:false)");
189 
190 module_param_named(guc_log_level, i915.guc_log_level, int, 0400);
191 MODULE_PARM_DESC(guc_log_level,
192 	"GuC firmware logging level (-1:disabled (default), 0-3:enabled)");
193