i915_params.c revision 1.2.6.2
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 <linux/module.h> 26 #include <linux/moduleparam.h> 27 #include "i915_drv.h" 28 29 struct i915_params i915 __read_mostly = { 30 .modeset = -1, 31 .panel_ignore_lid = 1, 32 .powersave = 1, 33 .semaphores = -1, 34 .lvds_downclock = 0, 35 .lvds_channel_mode = 0, 36 .panel_use_ssc = -1, 37 .vbt_sdvo_panel_type = -1, 38 .enable_rc6 = -1, 39 .enable_fbc = -1, 40 .enable_hangcheck = true, 41 .enable_ppgtt = -1, 42 .enable_psr = 0, 43 .preliminary_hw_support = IS_ENABLED(CONFIG_DRM_I915_PRELIMINARY_HW_SUPPORT), 44 .disable_power_well = 1, 45 .enable_ips = 1, 46 .fastboot = 0, 47 .prefault_disable = 0, 48 .reset = true, 49 .invert_brightness = 0, 50 .disable_display = 0, 51 .enable_cmd_parser = 0, 52 }; 53 54 module_param_named(modeset, i915.modeset, int, 0400); 55 MODULE_PARM_DESC(modeset, 56 "Use kernel modesetting [KMS] (0=DRM_I915_KMS from .config, " 57 "1=on, -1=force vga console preference [default])"); 58 59 module_param_named(panel_ignore_lid, i915.panel_ignore_lid, int, 0600); 60 MODULE_PARM_DESC(panel_ignore_lid, 61 "Override lid status (0=autodetect, 1=autodetect disabled [default], " 62 "-1=force lid closed, -2=force lid open)"); 63 64 module_param_named(powersave, i915.powersave, int, 0600); 65 MODULE_PARM_DESC(powersave, 66 "Enable powersavings, fbc, downclocking, etc. (default: true)"); 67 68 module_param_named(semaphores, i915.semaphores, int, 0400); 69 MODULE_PARM_DESC(semaphores, 70 "Use semaphores for inter-ring sync " 71 "(default: -1 (use per-chip defaults))"); 72 73 module_param_named(enable_rc6, i915.enable_rc6, int, 0400); 74 MODULE_PARM_DESC(enable_rc6, 75 "Enable power-saving render C-state 6. " 76 "Different stages can be selected via bitmask values " 77 "(0 = disable; 1 = enable rc6; 2 = enable deep rc6; 4 = enable deepest rc6). " 78 "For example, 3 would enable rc6 and deep rc6, and 7 would enable everything. " 79 "default: -1 (use per-chip default)"); 80 81 module_param_named(enable_fbc, i915.enable_fbc, int, 0600); 82 MODULE_PARM_DESC(enable_fbc, 83 "Enable frame buffer compression for power savings " 84 "(default: -1 (use per-chip default))"); 85 86 module_param_named(lvds_downclock, i915.lvds_downclock, int, 0400); 87 MODULE_PARM_DESC(lvds_downclock, 88 "Use panel (LVDS/eDP) downclocking for power savings " 89 "(default: false)"); 90 91 module_param_named(lvds_channel_mode, i915.lvds_channel_mode, int, 0600); 92 MODULE_PARM_DESC(lvds_channel_mode, 93 "Specify LVDS channel mode " 94 "(0=probe BIOS [default], 1=single-channel, 2=dual-channel)"); 95 96 module_param_named(lvds_use_ssc, i915.panel_use_ssc, int, 0600); 97 MODULE_PARM_DESC(lvds_use_ssc, 98 "Use Spread Spectrum Clock with panels [LVDS/eDP] " 99 "(default: auto from VBT)"); 100 101 module_param_named(vbt_sdvo_panel_type, i915.vbt_sdvo_panel_type, int, 0600); 102 MODULE_PARM_DESC(vbt_sdvo_panel_type, 103 "Override/Ignore selection of SDVO panel mode in the VBT " 104 "(-2=ignore, -1=auto [default], index in VBT BIOS table)"); 105 106 module_param_named(reset, i915.reset, bool, 0600); 107 MODULE_PARM_DESC(reset, "Attempt GPU resets (default: true)"); 108 109 module_param_named(enable_hangcheck, i915.enable_hangcheck, bool, 0644); 110 MODULE_PARM_DESC(enable_hangcheck, 111 "Periodically check GPU activity for detecting hangs. " 112 "WARNING: Disabling this can cause system wide hangs. " 113 "(default: true)"); 114 115 module_param_named(enable_ppgtt, i915.enable_ppgtt, int, 0400); 116 MODULE_PARM_DESC(enable_ppgtt, 117 "Override PPGTT usage. " 118 "(-1=auto [default], 0=disabled, 1=aliasing, 2=full)"); 119 120 module_param_named(enable_psr, i915.enable_psr, int, 0600); 121 MODULE_PARM_DESC(enable_psr, "Enable PSR (default: false)"); 122 123 module_param_named(preliminary_hw_support, i915.preliminary_hw_support, int, 0600); 124 MODULE_PARM_DESC(preliminary_hw_support, 125 "Enable preliminary hardware support."); 126 127 module_param_named(disable_power_well, i915.disable_power_well, int, 0600); 128 MODULE_PARM_DESC(disable_power_well, 129 "Disable the power well when possible (default: true)"); 130 131 module_param_named(enable_ips, i915.enable_ips, int, 0600); 132 MODULE_PARM_DESC(enable_ips, "Enable IPS (default: true)"); 133 134 module_param_named(fastboot, i915.fastboot, bool, 0600); 135 MODULE_PARM_DESC(fastboot, 136 "Try to skip unnecessary mode sets at boot time (default: false)"); 137 138 module_param_named(prefault_disable, i915.prefault_disable, bool, 0600); 139 MODULE_PARM_DESC(prefault_disable, 140 "Disable page prefaulting for pread/pwrite/reloc (default:false). " 141 "For developers only."); 142 143 module_param_named(invert_brightness, i915.invert_brightness, int, 0600); 144 MODULE_PARM_DESC(invert_brightness, 145 "Invert backlight brightness " 146 "(-1 force normal, 0 machine defaults, 1 force inversion), please " 147 "report PCI device ID, subsystem vendor and subsystem device ID " 148 "to dri-devel (at) lists.freedesktop.org, if your machine needs it. " 149 "It will then be included in an upcoming module version."); 150 151 module_param_named(disable_display, i915.disable_display, bool, 0600); 152 MODULE_PARM_DESC(disable_display, "Disable display (default: false)"); 153 154 module_param_named(enable_cmd_parser, i915.enable_cmd_parser, int, 0600); 155 MODULE_PARM_DESC(enable_cmd_parser, 156 "Enable command parsing (1=enabled, 0=disabled [default])"); 157
Indexes created Sun Oct 19 02:09:48 GMT 2025