xref: /openbmc/linux/drivers/gpu/drm/i915/i915_params.c (revision 981ab3f1)
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_params.h"
26 #include "i915_drv.h"
27 
28 struct i915_params i915 __read_mostly = {
29 	.modeset = -1,
30 	.panel_ignore_lid = 1,
31 	.semaphores = -1,
32 	.lvds_channel_mode = 0,
33 	.panel_use_ssc = -1,
34 	.vbt_sdvo_panel_type = -1,
35 	.enable_rc6 = -1,
36 	.enable_dc = -1,
37 	.enable_fbc = -1,
38 	.enable_execlists = -1,
39 	.enable_hangcheck = true,
40 	.enable_ppgtt = -1,
41 	.enable_psr = -1,
42 	.alpha_support = IS_ENABLED(CONFIG_DRM_I915_ALPHA_SUPPORT),
43 	.disable_power_well = -1,
44 	.enable_ips = 1,
45 	.fastboot = 0,
46 	.prefault_disable = 0,
47 	.load_detect_test = 0,
48 	.force_reset_modeset_test = 0,
49 	.reset = 2,
50 	.error_capture = true,
51 	.invert_brightness = 0,
52 	.disable_display = 0,
53 	.enable_cmd_parser = true,
54 	.use_mmio_flip = 0,
55 	.mmio_debug = 0,
56 	.verbose_state_checks = 1,
57 	.nuclear_pageflip = 0,
58 	.edp_vswing = 0,
59 	.enable_guc_loading = 0,
60 	.enable_guc_submission = 0,
61 	.guc_log_level = -1,
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,
67 	.enable_gvt = false,
68 };
69 
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])");
74 
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)");
79 
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))");
84 
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)");
92 
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)");
97 
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))");
102 
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)");
107 
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)");
112 
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)");
117 
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])");
120 
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");
124 
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.");
131 #endif
132 
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. "
137 	"(default: true)");
138 
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)");
143 
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)");
148 
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)");
153 
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.");
158 
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)");
163 
164 module_param_named_unsafe(enable_ips, i915.enable_ips, int, 0600);
165 MODULE_PARM_DESC(enable_ips, "Enable IPS (default: true)");
166 
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)");
170 
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.");
175 
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.");
180 
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.");
185 
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.");
193 
194 module_param_named(disable_display, i915.disable_display, bool, 0400);
195 MODULE_PARM_DESC(disable_display, "Disable display (default: false)");
196 
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)");
200 
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)");
204 
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.");
209 
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.");
213 
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.");
217 
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))");
224 
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)");
229 
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)");
234 
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)");
238 
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");
242 
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");
246 
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)");
256 
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)");
260