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_execlists = 0, 39 .enable_hangcheck = true, 40 .enable_ppgtt = -1, 41 .enable_psr = 0, 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 .reset = true, 48 .invert_brightness = 0, 49 .disable_display = 0, 50 .enable_cmd_parser = 1, 51 .disable_vtd_wa = 0, 52 .use_mmio_flip = 0, 53 .mmio_debug = 0, 54}; 55 56module_param_named(modeset, i915.modeset, int, 0400); 57MODULE_PARM_DESC(modeset, 58 "Use kernel modesetting [KMS] (0=DRM_I915_KMS from .config, " 59 "1=on, -1=force vga console preference [default])"); 60 61module_param_named(panel_ignore_lid, i915.panel_ignore_lid, int, 0600); 62MODULE_PARM_DESC(panel_ignore_lid, 63 "Override lid status (0=autodetect, 1=autodetect disabled [default], " 64 "-1=force lid closed, -2=force lid open)"); 65 66module_param_named(powersave, i915.powersave, int, 0600); 67MODULE_PARM_DESC(powersave, 68 "Enable powersavings, fbc, downclocking, etc. (default: true)"); 69 70module_param_named_unsafe(semaphores, i915.semaphores, int, 0400); 71MODULE_PARM_DESC(semaphores, 72 "Use semaphores for inter-ring sync " 73 "(default: -1 (use per-chip defaults))"); 74 75module_param_named_unsafe(enable_rc6, i915.enable_rc6, int, 0400); 76MODULE_PARM_DESC(enable_rc6, 77 "Enable power-saving render C-state 6. " 78 "Different stages can be selected via bitmask values " 79 "(0 = disable; 1 = enable rc6; 2 = enable deep rc6; 4 = enable deepest rc6). " 80 "For example, 3 would enable rc6 and deep rc6, and 7 would enable everything. " 81 "default: -1 (use per-chip default)"); 82 83module_param_named_unsafe(enable_fbc, i915.enable_fbc, int, 0600); 84MODULE_PARM_DESC(enable_fbc, 85 "Enable frame buffer compression for power savings " 86 "(default: -1 (use per-chip default))"); 87 88module_param_named(lvds_downclock, i915.lvds_downclock, int, 0400); 89MODULE_PARM_DESC(lvds_downclock, 90 "Use panel (LVDS/eDP) downclocking for power savings " 91 "(default: false)"); 92 93module_param_named(lvds_channel_mode, i915.lvds_channel_mode, int, 0600); 94MODULE_PARM_DESC(lvds_channel_mode, 95 "Specify LVDS channel mode " 96 "(0=probe BIOS [default], 1=single-channel, 2=dual-channel)"); 97 98module_param_named(lvds_use_ssc, i915.panel_use_ssc, int, 0600); 99MODULE_PARM_DESC(lvds_use_ssc, 100 "Use Spread Spectrum Clock with panels [LVDS/eDP] " 101 "(default: auto from VBT)"); 102 103module_param_named(vbt_sdvo_panel_type, i915.vbt_sdvo_panel_type, int, 0600); 104MODULE_PARM_DESC(vbt_sdvo_panel_type, 105 "Override/Ignore selection of SDVO panel mode in the VBT " 106 "(-2=ignore, -1=auto [default], index in VBT BIOS table)"); 107 108module_param_named(reset, i915.reset, bool, 0600); 109MODULE_PARM_DESC(reset, "Attempt GPU resets (default: true)"); 110 111module_param_named(enable_hangcheck, i915.enable_hangcheck, bool, 0644); 112MODULE_PARM_DESC(enable_hangcheck, 113 "Periodically check GPU activity for detecting hangs. " 114 "WARNING: Disabling this can cause system wide hangs. " 115 "(default: true)"); 116 117module_param_named_unsafe(enable_ppgtt, i915.enable_ppgtt, int, 0400); 118MODULE_PARM_DESC(enable_ppgtt, 119 "Override PPGTT usage. " 120 "(-1=auto [default], 0=disabled, 1=aliasing, 2=full)"); 121 122module_param_named(enable_execlists, i915.enable_execlists, int, 0400); 123MODULE_PARM_DESC(enable_execlists, 124 "Override execlists usage. " 125 "(-1=auto, 0=disabled [default], 1=enabled)"); 126 127module_param_named(enable_psr, i915.enable_psr, int, 0600); 128MODULE_PARM_DESC(enable_psr, "Enable PSR (default: false)"); 129 130module_param_named(preliminary_hw_support, i915.preliminary_hw_support, int, 0600); 131MODULE_PARM_DESC(preliminary_hw_support, 132 "Enable preliminary hardware support."); 133 134module_param_named(disable_power_well, i915.disable_power_well, int, 0600); 135MODULE_PARM_DESC(disable_power_well, 136 "Disable the power well when possible (default: true)"); 137 138module_param_named(enable_ips, i915.enable_ips, int, 0600); 139MODULE_PARM_DESC(enable_ips, "Enable IPS (default: true)"); 140 141module_param_named(fastboot, i915.fastboot, bool, 0600); 142MODULE_PARM_DESC(fastboot, 143 "Try to skip unnecessary mode sets at boot time (default: false)"); 144 145module_param_named(prefault_disable, i915.prefault_disable, bool, 0600); 146MODULE_PARM_DESC(prefault_disable, 147 "Disable page prefaulting for pread/pwrite/reloc (default:false). " 148 "For developers only."); 149 150module_param_named(invert_brightness, i915.invert_brightness, int, 0600); 151MODULE_PARM_DESC(invert_brightness, 152 "Invert backlight brightness " 153 "(-1 force normal, 0 machine defaults, 1 force inversion), please " 154 "report PCI device ID, subsystem vendor and subsystem device ID " 155 "to dri-devel@lists.freedesktop.org, if your machine needs it. " 156 "It will then be included in an upcoming module version."); 157 158module_param_named(disable_display, i915.disable_display, bool, 0600); 159MODULE_PARM_DESC(disable_display, "Disable display (default: false)"); 160 161module_param_named(disable_vtd_wa, i915.disable_vtd_wa, bool, 0600); 162MODULE_PARM_DESC(disable_vtd_wa, "Disable all VT-d workarounds (default: false)"); 163 164module_param_named(enable_cmd_parser, i915.enable_cmd_parser, int, 0600); 165MODULE_PARM_DESC(enable_cmd_parser, 166 "Enable command parsing (1=enabled [default], 0=disabled)"); 167 168module_param_named(use_mmio_flip, i915.use_mmio_flip, int, 0600); 169MODULE_PARM_DESC(use_mmio_flip, 170 "use MMIO flips (-1=never, 0=driver discretion [default], 1=always)"); 171 172module_param_named(mmio_debug, i915.mmio_debug, bool, 0600); 173MODULE_PARM_DESC(mmio_debug, 174 "Enable the MMIO debug code (default: false). This may negatively " 175 "affect performance."); 176