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 27 struct 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 = -1, 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 = 1, 48 .invert_brightness = 0, 49 .disable_display = 0, 50 .enable_cmd_parser = 0, 51 .disable_vtd_wa = 0, 52 .use_mmio_flip = 0, 53 .mmio_debug = 0, 54 .verbose_state_checks = 1, 55 .nuclear_pageflip = 0, 56 }; 57 58 module_param_named(modeset, i915.modeset, int, 0400); 59 TUNABLE_INT("drm.i915.modeset", &i915.modeset); 60 MODULE_PARM_DESC(modeset, 61 "Use kernel modesetting [KMS] (0=DRM_I915_KMS from .config, " 62 "1=on, -1=force vga console preference [default])"); 63 64 module_param_named(panel_ignore_lid, i915.panel_ignore_lid, int, 0600); 65 TUNABLE_INT("drm.i915.panel_ignore_lid", &i915.panel_ignore_lid); 66 MODULE_PARM_DESC(panel_ignore_lid, 67 "Override lid status (0=autodetect, 1=autodetect disabled [default], " 68 "-1=force lid closed, -2=force lid open)"); 69 70 module_param_named(powersave, i915.powersave, int, 0600); 71 TUNABLE_INT("drm.i915.powersave", &i915.powersave); 72 MODULE_PARM_DESC(powersave, 73 "Enable powersavings, fbc, downclocking, etc. (default: true)"); 74 75 module_param_named_unsafe(semaphores, i915.semaphores, int, 0400); 76 TUNABLE_INT("drm.i915.semaphores", &i915.semaphores); 77 MODULE_PARM_DESC(semaphores, 78 "Use semaphores for inter-ring sync " 79 "(default: -1 (use per-chip defaults))"); 80 81 module_param_named_unsafe(enable_rc6, i915.enable_rc6, int, 0400); 82 TUNABLE_INT("drm.i915.enable_rc6", &i915.enable_rc6); 83 MODULE_PARM_DESC(enable_rc6, 84 "Enable power-saving render C-state 6. " 85 "Different stages can be selected via bitmask values " 86 "(0 = disable; 1 = enable rc6; 2 = enable deep rc6; 4 = enable deepest rc6). " 87 "For example, 3 would enable rc6 and deep rc6, and 7 would enable everything. " 88 "default: -1 (use per-chip default)"); 89 90 module_param_named_unsafe(enable_fbc, i915.enable_fbc, int, 0600); 91 TUNABLE_INT("drm.i915.enable_fbc", &i915.enable_fbc); 92 MODULE_PARM_DESC(enable_fbc, 93 "Enable frame buffer compression for power savings " 94 "(default: -1 (use per-chip default))"); 95 96 module_param_named(lvds_downclock, i915.lvds_downclock, int, 0400); 97 TUNABLE_INT("drm.i915.lvds_downclock", &i915.lvds_downclock); 98 MODULE_PARM_DESC(lvds_downclock, 99 "Use panel (LVDS/eDP) downclocking for power savings " 100 "(default: false)"); 101 102 module_param_named(lvds_channel_mode, i915.lvds_channel_mode, int, 0600); 103 TUNABLE_INT("drm.i915.lvds_channel_mode", &i915.lvds_channel_mode); 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(lvds_use_ssc, i915.panel_use_ssc, int, 0600); 109 TUNABLE_INT("drm.i915.panel_use_ssc", &i915.panel_use_ssc); 110 MODULE_PARM_DESC(lvds_use_ssc, 111 "Use Spread Spectrum Clock with panels [LVDS/eDP] " 112 "(default: auto from VBT)"); 113 114 module_param_named(vbt_sdvo_panel_type, i915.vbt_sdvo_panel_type, int, 0600); 115 TUNABLE_INT("drm.i915.vbt_sdvo_panel_type", &i915.vbt_sdvo_panel_type); 116 MODULE_PARM_DESC(vbt_sdvo_panel_type, 117 "Override/Ignore selection of SDVO panel mode in the VBT " 118 "(-2=ignore, -1=auto [default], index in VBT BIOS table)"); 119 120 module_param_named(reset, i915.reset, bool, 0600); 121 TUNABLE_INT("drm.i915.reset", &i915.reset); 122 MODULE_PARM_DESC(reset, "Attempt GPU resets (default: true)"); 123 124 module_param_named(enable_hangcheck, i915.enable_hangcheck, bool, 0644); 125 MODULE_PARM_DESC(enable_hangcheck, 126 "Periodically check GPU activity for detecting hangs. " 127 "WARNING: Disabling this can cause system wide hangs. " 128 "(default: true)"); 129 130 module_param_named_unsafe(enable_ppgtt, i915.enable_ppgtt, int, 0400); 131 TUNABLE_INT("drm.i915.enable_ppgtt", &i915.enable_ppgtt); 132 MODULE_PARM_DESC(enable_ppgtt, 133 "Override PPGTT usage. " 134 "(-1=auto [default], 0=disabled, 1=aliasing, 2=full)"); 135 136 module_param_named(enable_execlists, i915.enable_execlists, int, 0400); 137 MODULE_PARM_DESC(enable_execlists, 138 "Override execlists usage. " 139 "(-1=auto [default], 0=disabled, 1=enabled)"); 140 141 module_param_named(enable_psr, i915.enable_psr, int, 0600); 142 TUNABLE_INT("drm.i915.enable_psr", &i915.enable_psr); 143 MODULE_PARM_DESC(enable_psr, "Enable PSR (default: false)"); 144 145 module_param_named(preliminary_hw_support, i915.preliminary_hw_support, int, 0600); 146 MODULE_PARM_DESC(preliminary_hw_support, 147 "Enable preliminary hardware support."); 148 149 module_param_named(disable_power_well, i915.disable_power_well, int, 0600); 150 MODULE_PARM_DESC(disable_power_well, 151 "Disable the power well when possible (default: true)"); 152 153 module_param_named(enable_ips, i915.enable_ips, int, 0600); 154 MODULE_PARM_DESC(enable_ips, "Enable IPS (default: true)"); 155 156 module_param_named(fastboot, i915.fastboot, bool, 0600); 157 MODULE_PARM_DESC(fastboot, 158 "Try to skip unnecessary mode sets at boot time (default: false)"); 159 160 module_param_named(prefault_disable, i915.prefault_disable, bool, 0600); 161 MODULE_PARM_DESC(prefault_disable, 162 "Disable page prefaulting for pread/pwrite/reloc (default:false). " 163 "For developers only."); 164 165 module_param_named(invert_brightness, i915.invert_brightness, int, 0600); 166 TUNABLE_INT("drm.i915.panel_invert_brightness", &i915.invert_brightness); 167 MODULE_PARM_DESC(invert_brightness, 168 "Invert backlight brightness " 169 "(-1 force normal, 0 machine defaults, 1 force inversion), please " 170 "report PCI device ID, subsystem vendor and subsystem device ID " 171 "to dri-devel@lists.freedesktop.org, if your machine needs it. " 172 "It will then be included in an upcoming module version."); 173 174 module_param_named(disable_display, i915.disable_display, bool, 0600); 175 MODULE_PARM_DESC(disable_display, "Disable display (default: false)"); 176 177 module_param_named(disable_vtd_wa, i915.disable_vtd_wa, bool, 0600); 178 MODULE_PARM_DESC(disable_vtd_wa, "Disable all VT-d workarounds (default: false)"); 179 180 module_param_named(enable_cmd_parser, i915.enable_cmd_parser, int, 0600); 181 MODULE_PARM_DESC(enable_cmd_parser, 182 "Enable command parsing (1=enabled [default], 0=disabled)"); 183 184 module_param_named(use_mmio_flip, i915.use_mmio_flip, int, 0600); 185 TUNABLE_INT("drm.i915.use_mmio_flip", &i915.use_mmio_flip); 186 MODULE_PARM_DESC(use_mmio_flip, 187 "use MMIO flips (-1=never, 0=driver discretion [default], 1=always)"); 188 189 module_param_named(mmio_debug, i915.mmio_debug, bool, 0600); 190 MODULE_PARM_DESC(mmio_debug, 191 "Enable the MMIO debug code (default: false). This may negatively " 192 "affect performance."); 193 194 module_param_named(verbose_state_checks, i915.verbose_state_checks, bool, 0600); 195 MODULE_PARM_DESC(verbose_state_checks, 196 "Enable verbose logs (ie. WARN_ON()) in case of unexpected hw state conditions."); 197 198 module_param_named_unsafe(nuclear_pageflip, i915.nuclear_pageflip, bool, 0600); 199 MODULE_PARM_DESC(nuclear_pageflip, 200 "Force atomic modeset functionality; only planes work for now (default: false)."); 201