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
 27struct i915_params i915 __read_mostly = {
 28	.modeset = -1,
 29	.panel_ignore_lid = 1,
 30	.powersave = 1,
 31	.semaphores = -1,
 32	.lvds_downclock = 0,
 33	.lvds_channel_mode = 0,
 34	.panel_use_ssc = -1,
 35	.vbt_sdvo_panel_type = -1,
 36	.enable_rc6 = -1,
 37	.enable_fbc = -1,
 38	.enable_hangcheck = true,
 39	.enable_ppgtt = -1,
 40	.enable_psr = 0,
 41	.preliminary_hw_support = IS_ENABLED(CONFIG_DRM_I915_PRELIMINARY_HW_SUPPORT),
 42	.disable_power_well = 1,
 43	.enable_ips = 1,
 44	.fastboot = 0,
 45	.prefault_disable = 0,
 46	.reset = true,
 47	.invert_brightness = 0,
 48	.disable_display = 0,
 49	.enable_cmd_parser = 0,
 50};
 51
 52module_param_named(modeset, i915.modeset, int, 0400);
 53MODULE_PARM_DESC(modeset,
 54	"Use kernel modesetting [KMS] (0=DRM_I915_KMS from .config, "
 55	"1=on, -1=force vga console preference [default])");
 56
 57module_param_named(panel_ignore_lid, i915.panel_ignore_lid, int, 0600);
 58MODULE_PARM_DESC(panel_ignore_lid,
 59	"Override lid status (0=autodetect, 1=autodetect disabled [default], "
 60	"-1=force lid closed, -2=force lid open)");
 61
 62module_param_named(powersave, i915.powersave, int, 0600);
 63MODULE_PARM_DESC(powersave,
 64	"Enable powersavings, fbc, downclocking, etc. (default: true)");
 65
 66module_param_named(semaphores, i915.semaphores, int, 0400);
 67MODULE_PARM_DESC(semaphores,
 68	"Use semaphores for inter-ring sync "
 69	"(default: -1 (use per-chip defaults))");
 70
 71module_param_named(enable_rc6, i915.enable_rc6, int, 0400);
 72MODULE_PARM_DESC(enable_rc6,
 73	"Enable power-saving render C-state 6. "
 74	"Different stages can be selected via bitmask values "
 75	"(0 = disable; 1 = enable rc6; 2 = enable deep rc6; 4 = enable deepest rc6). "
 76	"For example, 3 would enable rc6 and deep rc6, and 7 would enable everything. "
 77	"default: -1 (use per-chip default)");
 78
 79module_param_named(enable_fbc, i915.enable_fbc, int, 0600);
 80MODULE_PARM_DESC(enable_fbc,
 81	"Enable frame buffer compression for power savings "
 82	"(default: -1 (use per-chip default))");
 83
 84module_param_named(lvds_downclock, i915.lvds_downclock, int, 0400);
 85MODULE_PARM_DESC(lvds_downclock,
 86	"Use panel (LVDS/eDP) downclocking for power savings "
 87	"(default: false)");
 88
 89module_param_named(lvds_channel_mode, i915.lvds_channel_mode, int, 0600);
 90MODULE_PARM_DESC(lvds_channel_mode,
 91	 "Specify LVDS channel mode "
 92	 "(0=probe BIOS [default], 1=single-channel, 2=dual-channel)");
 93
 94module_param_named(lvds_use_ssc, i915.panel_use_ssc, int, 0600);
 95MODULE_PARM_DESC(lvds_use_ssc,
 96	"Use Spread Spectrum Clock with panels [LVDS/eDP] "
 97	"(default: auto from VBT)");
 98
 99module_param_named(vbt_sdvo_panel_type, i915.vbt_sdvo_panel_type, int, 0600);
100MODULE_PARM_DESC(vbt_sdvo_panel_type,
101	"Override/Ignore selection of SDVO panel mode in the VBT "
102	"(-2=ignore, -1=auto [default], index in VBT BIOS table)");
103
104module_param_named(reset, i915.reset, bool, 0600);
105MODULE_PARM_DESC(reset, "Attempt GPU resets (default: true)");
106
107module_param_named(enable_hangcheck, i915.enable_hangcheck, bool, 0644);
108MODULE_PARM_DESC(enable_hangcheck,
109	"Periodically check GPU activity for detecting hangs. "
110	"WARNING: Disabling this can cause system wide hangs. "
111	"(default: true)");
112
113module_param_named(enable_ppgtt, i915.enable_ppgtt, int, 0400);
114MODULE_PARM_DESC(enable_ppgtt,
115	"Override PPGTT usage. "
116	"(-1=auto [default], 0=disabled, 1=aliasing, 2=full)");
117
118module_param_named(enable_psr, i915.enable_psr, int, 0600);
119MODULE_PARM_DESC(enable_psr, "Enable PSR (default: false)");
120
121module_param_named(preliminary_hw_support, i915.preliminary_hw_support, int, 0600);
122MODULE_PARM_DESC(preliminary_hw_support,
123	"Enable preliminary hardware support.");
124
125module_param_named(disable_power_well, i915.disable_power_well, int, 0600);
126MODULE_PARM_DESC(disable_power_well,
127	"Disable the power well when possible (default: true)");
128
129module_param_named(enable_ips, i915.enable_ips, int, 0600);
130MODULE_PARM_DESC(enable_ips, "Enable IPS (default: true)");
131
132module_param_named(fastboot, i915.fastboot, bool, 0600);
133MODULE_PARM_DESC(fastboot,
134	"Try to skip unnecessary mode sets at boot time (default: false)");
135
136module_param_named(prefault_disable, i915.prefault_disable, bool, 0600);
137MODULE_PARM_DESC(prefault_disable,
138	"Disable page prefaulting for pread/pwrite/reloc (default:false). "
139	"For developers only.");
140
141module_param_named(invert_brightness, i915.invert_brightness, int, 0600);
142MODULE_PARM_DESC(invert_brightness,
143	"Invert backlight brightness "
144	"(-1 force normal, 0 machine defaults, 1 force inversion), please "
145	"report PCI device ID, subsystem vendor and subsystem device ID "
146	"to dri-devel@lists.freedesktop.org, if your machine needs it. "
147	"It will then be included in an upcoming module version.");
148
149module_param_named(disable_display, i915.disable_display, bool, 0600);
150MODULE_PARM_DESC(disable_display, "Disable display (default: false)");
151
152module_param_named(enable_cmd_parser, i915.enable_cmd_parser, int, 0600);
153MODULE_PARM_DESC(enable_cmd_parser,
154		 "Enable command parsing (1=enabled, 0=disabled [default])");