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 .semaphores = -1, 31 .lvds_downclock = 0, 32 .lvds_channel_mode = 0, 33 .panel_use_ssc = -1, 34 .vbt_sdvo_panel_type = -1, 35 .enable_rc6 = -1, 36 .enable_fbc = -1, 37 .enable_execlists = -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 .load_detect_test = 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 .edp_vswing = 0, 57 }; 58 59 module_param_named(modeset, i915.modeset, int, 0400); 60 TUNABLE_INT("drm.i915.modeset", &i915.modeset); 61 MODULE_PARM_DESC(modeset, 62 "Use kernel modesetting [KMS] (0=DRM_I915_KMS from .config, " 63 "1=on, -1=force vga console preference [default])"); 64 65 module_param_named(panel_ignore_lid, i915.panel_ignore_lid, int, 0600); 66 TUNABLE_INT("drm.i915.panel_ignore_lid", &i915.panel_ignore_lid); 67 MODULE_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 71 module_param_named_unsafe(semaphores, i915.semaphores, int, 0400); 72 TUNABLE_INT("drm.i915.semaphores", &i915.semaphores); 73 MODULE_PARM_DESC(semaphores, 74 "Use semaphores for inter-ring sync " 75 "(default: -1 (use per-chip defaults))"); 76 77 module_param_named_unsafe(enable_rc6, i915.enable_rc6, int, 0400); 78 TUNABLE_INT("drm.i915.enable_rc6", &i915.enable_rc6); 79 MODULE_PARM_DESC(enable_rc6, 80 "Enable power-saving render C-state 6. " 81 "Different stages can be selected via bitmask values " 82 "(0 = disable; 1 = enable rc6; 2 = enable deep rc6; 4 = enable deepest rc6). " 83 "For example, 3 would enable rc6 and deep rc6, and 7 would enable everything. " 84 "default: -1 (use per-chip default)"); 85 86 module_param_named_unsafe(enable_fbc, i915.enable_fbc, int, 0600); 87 TUNABLE_INT("drm.i915.enable_fbc", &i915.enable_fbc); 88 MODULE_PARM_DESC(enable_fbc, 89 "Enable frame buffer compression for power savings " 90 "(default: -1 (use per-chip default))"); 91 92 module_param_named(lvds_downclock, i915.lvds_downclock, int, 0400); 93 TUNABLE_INT("drm.i915.lvds_downclock", &i915.lvds_downclock); 94 MODULE_PARM_DESC(lvds_downclock, 95 "Use panel (LVDS/eDP) downclocking for power savings " 96 "(default: false)"); 97 98 module_param_named(lvds_channel_mode, i915.lvds_channel_mode, int, 0600); 99 TUNABLE_INT("drm.i915.lvds_channel_mode", &i915.lvds_channel_mode); 100 MODULE_PARM_DESC(lvds_channel_mode, 101 "Specify LVDS channel mode " 102 "(0=probe BIOS [default], 1=single-channel, 2=dual-channel)"); 103 104 module_param_named(lvds_use_ssc, i915.panel_use_ssc, int, 0600); 105 TUNABLE_INT("drm.i915.panel_use_ssc", &i915.panel_use_ssc); 106 MODULE_PARM_DESC(lvds_use_ssc, 107 "Use Spread Spectrum Clock with panels [LVDS/eDP] " 108 "(default: auto from VBT)"); 109 110 module_param_named(vbt_sdvo_panel_type, i915.vbt_sdvo_panel_type, int, 0600); 111 TUNABLE_INT("drm.i915.vbt_sdvo_panel_type", &i915.vbt_sdvo_panel_type); 112 MODULE_PARM_DESC(vbt_sdvo_panel_type, 113 "Override/Ignore selection of SDVO panel mode in the VBT " 114 "(-2=ignore, -1=auto [default], index in VBT BIOS table)"); 115 116 module_param_named(reset, i915.reset, bool, 0600); 117 TUNABLE_INT("drm.i915.reset", &i915.reset); 118 MODULE_PARM_DESC(reset, "Attempt GPU resets (default: true)"); 119 120 module_param_named(enable_hangcheck, i915.enable_hangcheck, bool, 0644); 121 MODULE_PARM_DESC(enable_hangcheck, 122 "Periodically check GPU activity for detecting hangs. " 123 "WARNING: Disabling this can cause system wide hangs. " 124 "(default: true)"); 125 126 module_param_named_unsafe(enable_ppgtt, i915.enable_ppgtt, int, 0400); 127 TUNABLE_INT("drm.i915.enable_ppgtt", &i915.enable_ppgtt); 128 MODULE_PARM_DESC(enable_ppgtt, 129 "Override PPGTT usage. " 130 "(-1=auto [default], 0=disabled, 1=aliasing, 2=full)"); 131 132 module_param_named(enable_execlists, i915.enable_execlists, int, 0400); 133 TUNABLE_INT("drm.i915.enable_execlists", &i915.enable_execlists); 134 MODULE_PARM_DESC(enable_execlists, 135 "Override execlists usage. " 136 "(-1=auto [default], 0=disabled, 1=enabled)"); 137 138 module_param_named(enable_psr, i915.enable_psr, int, 0600); 139 TUNABLE_INT("drm.i915.enable_psr", &i915.enable_psr); 140 MODULE_PARM_DESC(enable_psr, "Enable PSR (default: false)"); 141 142 module_param_named(preliminary_hw_support, i915.preliminary_hw_support, int, 0600); 143 MODULE_PARM_DESC(preliminary_hw_support, 144 "Enable preliminary hardware support."); 145 146 module_param_named(disable_power_well, i915.disable_power_well, int, 0600); 147 MODULE_PARM_DESC(disable_power_well, 148 "Disable the power well when possible (default: true)"); 149 150 module_param_named(enable_ips, i915.enable_ips, int, 0600); 151 MODULE_PARM_DESC(enable_ips, "Enable IPS (default: true)"); 152 153 module_param_named(fastboot, i915.fastboot, bool, 0600); 154 MODULE_PARM_DESC(fastboot, 155 "Try to skip unnecessary mode sets at boot time (default: false)"); 156 157 module_param_named_unsafe(prefault_disable, i915.prefault_disable, bool, 0600); 158 MODULE_PARM_DESC(prefault_disable, 159 "Disable page prefaulting for pread/pwrite/reloc (default:false). " 160 "For developers only."); 161 162 module_param_named_unsafe(load_detect_test, i915.load_detect_test, bool, 0600); 163 MODULE_PARM_DESC(load_detect_test, 164 "Force-enable the VGA load detect code for testing (default:false). " 165 "For developers only."); 166 167 module_param_named(invert_brightness, i915.invert_brightness, int, 0600); 168 TUNABLE_INT("drm.i915.panel_invert_brightness", &i915.invert_brightness); 169 MODULE_PARM_DESC(invert_brightness, 170 "Invert backlight brightness " 171 "(-1 force normal, 0 machine defaults, 1 force inversion), please " 172 "report PCI device ID, subsystem vendor and subsystem device ID " 173 "to dri-devel@lists.freedesktop.org, if your machine needs it. " 174 "It will then be included in an upcoming module version."); 175 176 module_param_named(disable_display, i915.disable_display, bool, 0600); 177 MODULE_PARM_DESC(disable_display, "Disable display (default: false)"); 178 179 module_param_named(disable_vtd_wa, i915.disable_vtd_wa, bool, 0600); 180 MODULE_PARM_DESC(disable_vtd_wa, "Disable all VT-d workarounds (default: false)"); 181 182 module_param_named(enable_cmd_parser, i915.enable_cmd_parser, int, 0600); 183 MODULE_PARM_DESC(enable_cmd_parser, 184 "Enable command parsing (1=enabled [default], 0=disabled)"); 185 186 module_param_named(use_mmio_flip, i915.use_mmio_flip, int, 0600); 187 TUNABLE_INT("drm.i915.use_mmio_flip", &i915.use_mmio_flip); 188 MODULE_PARM_DESC(use_mmio_flip, 189 "use MMIO flips (-1=never, 0=driver discretion [default], 1=always)"); 190 191 module_param_named(mmio_debug, i915.mmio_debug, int, 0600); 192 MODULE_PARM_DESC(mmio_debug, 193 "Enable the MMIO debug code for the first N failures (default: off). " 194 "This may negatively affect performance."); 195 196 module_param_named(verbose_state_checks, i915.verbose_state_checks, bool, 0600); 197 MODULE_PARM_DESC(verbose_state_checks, 198 "Enable verbose logs (ie. WARN_ON()) in case of unexpected hw state conditions."); 199 200 module_param_named_unsafe(nuclear_pageflip, i915.nuclear_pageflip, bool, 0600); 201 MODULE_PARM_DESC(nuclear_pageflip, 202 "Force atomic modeset functionality; only planes work for now (default: false)."); 203 204 /* WA to get away with the default setting in VBT for early platforms.Will be removed */ 205 module_param_named_unsafe(edp_vswing, i915.edp_vswing, int, 0400); 206 MODULE_PARM_DESC(edp_vswing, 207 "Ignore/Override vswing pre-emph table selection from VBT " 208 "(0=use value from vbt [default], 1=low power swing(200mV)," 209 "2=default swing(400mV))"); 210