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
 28struct 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	.preliminary_hw_support = IS_ENABLED(CONFIG_DRM_I915_PRELIMINARY_HW_SUPPORT),
 43	.disable_power_well = -1,
 44	.enable_ips = 1,
 45	.fastboot = 0,
 46	.prefault_disable = 0,
 47	.load_detect_test = 0,
 48	.reset = true,
 49	.invert_brightness = 0,
 50	.disable_display = 0,
 51	.enable_cmd_parser = 1,
 52	.use_mmio_flip = 0,
 53	.mmio_debug = 0,
 54	.verbose_state_checks = 1,
 55	.nuclear_pageflip = 0,
 56	.edp_vswing = 0,
 57	.enable_guc_submission = false,
 58	.guc_log_level = -1,
 59};
 60
 61module_param_named(modeset, i915.modeset, int, 0400);
 62MODULE_PARM_DESC(modeset,
 63	"Use kernel modesetting [KMS] (0=disable, "
 64	"1=on, -1=force vga console preference [default])");
 65
 66module_param_named_unsafe(panel_ignore_lid, i915.panel_ignore_lid, int, 0600);
 67MODULE_PARM_DESC(panel_ignore_lid,
 68	"Override lid status (0=autodetect, 1=autodetect disabled [default], "
 69	"-1=force lid closed, -2=force lid open)");
 70
 71module_param_named_unsafe(semaphores, i915.semaphores, int, 0400);
 72MODULE_PARM_DESC(semaphores,
 73	"Use semaphores for inter-ring sync "
 74	"(default: -1 (use per-chip defaults))");
 75
 76module_param_named_unsafe(enable_rc6, i915.enable_rc6, int, 0400);
 77MODULE_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)");
 83
 84module_param_named_unsafe(enable_dc, i915.enable_dc, int, 0400);
 85MODULE_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)");
 88
 89module_param_named_unsafe(enable_fbc, i915.enable_fbc, int, 0600);
 90MODULE_PARM_DESC(enable_fbc,
 91	"Enable frame buffer compression for power savings "
 92	"(default: -1 (use per-chip default))");
 93
 94module_param_named_unsafe(lvds_channel_mode, i915.lvds_channel_mode, int, 0400);
 95MODULE_PARM_DESC(lvds_channel_mode,
 96	 "Specify LVDS channel mode "
 97	 "(0=probe BIOS [default], 1=single-channel, 2=dual-channel)");
 98
 99module_param_named_unsafe(lvds_use_ssc, i915.panel_use_ssc, int, 0600);
100MODULE_PARM_DESC(lvds_use_ssc,
101	"Use Spread Spectrum Clock with panels [LVDS/eDP] "
102	"(default: auto from VBT)");
103
104module_param_named_unsafe(vbt_sdvo_panel_type, i915.vbt_sdvo_panel_type, int, 0400);
105MODULE_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)");
108
109module_param_named_unsafe(reset, i915.reset, bool, 0600);
110MODULE_PARM_DESC(reset, "Attempt GPU resets (default: true)");
111
112module_param_named_unsafe(enable_hangcheck, i915.enable_hangcheck, bool, 0644);
113MODULE_PARM_DESC(enable_hangcheck,
114	"Periodically check GPU activity for detecting hangs. "
115	"WARNING: Disabling this can cause system wide hangs. "
116	"(default: true)");
117
118module_param_named_unsafe(enable_ppgtt, i915.enable_ppgtt, int, 0400);
119MODULE_PARM_DESC(enable_ppgtt,
120	"Override PPGTT usage. "
121	"(-1=auto [default], 0=disabled, 1=aliasing, 2=full, 3=full with extended address space)");
122
123module_param_named_unsafe(enable_execlists, i915.enable_execlists, int, 0400);
124MODULE_PARM_DESC(enable_execlists,
125	"Override execlists usage. "
126	"(-1=auto [default], 0=disabled, 1=enabled)");
127
128module_param_named_unsafe(enable_psr, i915.enable_psr, int, 0600);
129MODULE_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)");
132
133module_param_named_unsafe(preliminary_hw_support, i915.preliminary_hw_support, int, 0400);
134MODULE_PARM_DESC(preliminary_hw_support,
135	"Enable preliminary hardware support.");
136
137module_param_named_unsafe(disable_power_well, i915.disable_power_well, int, 0400);
138MODULE_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)");
141
142module_param_named_unsafe(enable_ips, i915.enable_ips, int, 0600);
143MODULE_PARM_DESC(enable_ips, "Enable IPS (default: true)");
144
145module_param_named(fastboot, i915.fastboot, bool, 0600);
146MODULE_PARM_DESC(fastboot,
147	"Try to skip unnecessary mode sets at boot time (default: false)");
148
149module_param_named_unsafe(prefault_disable, i915.prefault_disable, bool, 0600);
150MODULE_PARM_DESC(prefault_disable,
151	"Disable page prefaulting for pread/pwrite/reloc (default:false). "
152	"For developers only.");
153
154module_param_named_unsafe(load_detect_test, i915.load_detect_test, bool, 0600);
155MODULE_PARM_DESC(load_detect_test,
156	"Force-enable the VGA load detect code for testing (default:false). "
157	"For developers only.");
158
159module_param_named_unsafe(invert_brightness, i915.invert_brightness, int, 0600);
160MODULE_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.");
166
167module_param_named(disable_display, i915.disable_display, bool, 0400);
168MODULE_PARM_DESC(disable_display, "Disable display (default: false)");
169
170module_param_named_unsafe(enable_cmd_parser, i915.enable_cmd_parser, int, 0600);
171MODULE_PARM_DESC(enable_cmd_parser,
172		 "Enable command parsing (1=enabled [default], 0=disabled)");
173
174module_param_named_unsafe(use_mmio_flip, i915.use_mmio_flip, int, 0600);
175MODULE_PARM_DESC(use_mmio_flip,
176		 "use MMIO flips (-1=never, 0=driver discretion [default], 1=always)");
177
178module_param_named(mmio_debug, i915.mmio_debug, int, 0600);
179MODULE_PARM_DESC(mmio_debug,
180	"Enable the MMIO debug code for the first N failures (default: off). "
181	"This may negatively affect performance.");
182
183module_param_named(verbose_state_checks, i915.verbose_state_checks, bool, 0600);
184MODULE_PARM_DESC(verbose_state_checks,
185	"Enable verbose logs (ie. WARN_ON()) in case of unexpected hw state conditions.");
186
187module_param_named_unsafe(nuclear_pageflip, i915.nuclear_pageflip, bool, 0600);
188MODULE_PARM_DESC(nuclear_pageflip,
189		 "Force atomic modeset functionality; asynchronous mode is not yet supported. (default: false).");
190
191/* WA to get away with the default setting in VBT for early platforms.Will be removed */
192module_param_named_unsafe(edp_vswing, i915.edp_vswing, int, 0400);
193MODULE_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))");
197
198module_param_named_unsafe(enable_guc_submission, i915.enable_guc_submission, bool, 0400);
199MODULE_PARM_DESC(enable_guc_submission, "Enable GuC submission (default:false)");
200
201module_param_named(guc_log_level, i915.guc_log_level, int, 0400);
202MODULE_PARM_DESC(guc_log_level,
203	"GuC firmware logging level (-1:disabled (default), 0-3:enabled)");