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_channel_mode = 0, 32 .panel_use_ssc = -1, 33 .vbt_sdvo_panel_type = -1, 34 .enable_rc6 = -1, 35 .enable_fbc = -1, 36 .enable_execlists = -1, 37 .enable_hangcheck = true, 38 .enable_ppgtt = -1, 39 .enable_psr = 0, 40 .preliminary_hw_support = IS_ENABLED(CONFIG_DRM_I915_PRELIMINARY_HW_SUPPORT), 41 .disable_power_well = -1, 42 .enable_ips = 1, 43 .fastboot = 0, 44 .prefault_disable = 0, 45 .load_detect_test = 0, 46 .reset = 1, 47 .invert_brightness = 0, 48 .disable_display = 0, 49 .enable_cmd_parser = 0, 50 .disable_vtd_wa = 0, 51 .use_mmio_flip = 0, 52 .mmio_debug = 0, 53 .verbose_state_checks = 1, 54 .nuclear_pageflip = 0, 55 .edp_vswing = 0, 56 .enable_guc_submission = false, 57 .guc_log_level = -1, 58 }; 59 60 module_param_named(modeset, i915.modeset, int, 0400); 61 TUNABLE_INT("drm.i915.modeset", &i915.modeset); 62 MODULE_PARM_DESC(modeset, 63 "Use kernel modesetting [KMS] (0=disable, " 64 "1=on, -1=force vga console preference [default])"); 65 66 module_param_named_unsafe(panel_ignore_lid, i915.panel_ignore_lid, int, 0600); 67 TUNABLE_INT("drm.i915.panel_ignore_lid", &i915.panel_ignore_lid); 68 MODULE_PARM_DESC(panel_ignore_lid, 69 "Override lid status (0=autodetect, 1=autodetect disabled [default], " 70 "-1=force lid closed, -2=force lid open)"); 71 72 module_param_named_unsafe(semaphores, i915.semaphores, int, 0400); 73 TUNABLE_INT("drm.i915.semaphores", &i915.semaphores); 74 MODULE_PARM_DESC(semaphores, 75 "Use semaphores for inter-ring sync " 76 "(default: -1 (use per-chip defaults))"); 77 78 module_param_named_unsafe(enable_rc6, i915.enable_rc6, int, 0400); 79 TUNABLE_INT("drm.i915.enable_rc6", &i915.enable_rc6); 80 MODULE_PARM_DESC(enable_rc6, 81 "Enable power-saving render C-state 6. " 82 "Different stages can be selected via bitmask values " 83 "(0 = disable; 1 = enable rc6; 2 = enable deep rc6; 4 = enable deepest rc6). " 84 "For example, 3 would enable rc6 and deep rc6, and 7 would enable everything. " 85 "default: -1 (use per-chip default)"); 86 87 module_param_named_unsafe(enable_fbc, i915.enable_fbc, int, 0600); 88 TUNABLE_INT("drm.i915.enable_fbc", &i915.enable_fbc); 89 MODULE_PARM_DESC(enable_fbc, 90 "Enable frame buffer compression for power savings " 91 "(default: -1 (use per-chip default))"); 92 93 module_param_named_unsafe(lvds_channel_mode, i915.lvds_channel_mode, int, 0600); 94 TUNABLE_INT("drm.i915.lvds_channel_mode", &i915.lvds_channel_mode); 95 MODULE_PARM_DESC(lvds_channel_mode, 96 "Specify LVDS channel mode " 97 "(0=probe BIOS [default], 1=single-channel, 2=dual-channel)"); 98 99 module_param_named_unsafe(lvds_use_ssc, i915.panel_use_ssc, int, 0600); 100 TUNABLE_INT("drm.i915.panel_use_ssc", &i915.panel_use_ssc); 101 MODULE_PARM_DESC(lvds_use_ssc, 102 "Use Spread Spectrum Clock with panels [LVDS/eDP] " 103 "(default: auto from VBT)"); 104 105 module_param_named_unsafe(vbt_sdvo_panel_type, i915.vbt_sdvo_panel_type, int, 0600); 106 TUNABLE_INT("drm.i915.vbt_sdvo_panel_type", &i915.vbt_sdvo_panel_type); 107 MODULE_PARM_DESC(vbt_sdvo_panel_type, 108 "Override/Ignore selection of SDVO panel mode in the VBT " 109 "(-2=ignore, -1=auto [default], index in VBT BIOS table)"); 110 111 module_param_named_unsafe(reset, i915.reset, bool, 0600); 112 TUNABLE_INT("drm.i915.reset", &i915.reset); 113 MODULE_PARM_DESC(reset, "Attempt GPU resets (default: true)"); 114 115 module_param_named_unsafe(enable_hangcheck, i915.enable_hangcheck, bool, 0644); 116 MODULE_PARM_DESC(enable_hangcheck, 117 "Periodically check GPU activity for detecting hangs. " 118 "WARNING: Disabling this can cause system wide hangs. " 119 "(default: true)"); 120 121 module_param_named_unsafe(enable_ppgtt, i915.enable_ppgtt, int, 0400); 122 TUNABLE_INT("drm.i915.enable_ppgtt", &i915.enable_ppgtt); 123 MODULE_PARM_DESC(enable_ppgtt, 124 "Override PPGTT usage. " 125 "(-1=auto [default], 0=disabled, 1=aliasing, 2=full)"); 126 127 module_param_named_unsafe(enable_execlists, i915.enable_execlists, int, 0400); 128 TUNABLE_INT("drm.i915.enable_execlists", &i915.enable_execlists); 129 MODULE_PARM_DESC(enable_execlists, 130 "Override execlists usage. " 131 "(-1=auto [default], 0=disabled, 1=enabled)"); 132 133 module_param_named_unsafe(enable_psr, i915.enable_psr, int, 0600); 134 TUNABLE_INT("drm.i915.enable_psr", &i915.enable_psr); 135 MODULE_PARM_DESC(enable_psr, "Enable PSR (default: false)"); 136 137 module_param_named_unsafe(preliminary_hw_support, i915.preliminary_hw_support, int, 0600); 138 MODULE_PARM_DESC(preliminary_hw_support, 139 "Enable preliminary hardware support."); 140 141 module_param_named_unsafe(disable_power_well, i915.disable_power_well, int, 0600); 142 MODULE_PARM_DESC(disable_power_well, 143 "Disable display power wells when possible " 144 "(-1=auto [default], 0=power wells always on, 1=power wells disabled when possible)"); 145 146 module_param_named_unsafe(enable_ips, i915.enable_ips, int, 0600); 147 MODULE_PARM_DESC(enable_ips, "Enable IPS (default: true)"); 148 149 module_param_named(fastboot, i915.fastboot, bool, 0600); 150 MODULE_PARM_DESC(fastboot, 151 "Try to skip unnecessary mode sets at boot time (default: false)"); 152 153 module_param_named_unsafe(prefault_disable, i915.prefault_disable, bool, 0600); 154 MODULE_PARM_DESC(prefault_disable, 155 "Disable page prefaulting for pread/pwrite/reloc (default:false). " 156 "For developers only."); 157 158 module_param_named_unsafe(load_detect_test, i915.load_detect_test, bool, 0600); 159 MODULE_PARM_DESC(load_detect_test, 160 "Force-enable the VGA load detect code for testing (default:false). " 161 "For developers only."); 162 163 module_param_named_unsafe(invert_brightness, i915.invert_brightness, int, 0600); 164 TUNABLE_INT("drm.i915.panel_invert_brightness", &i915.invert_brightness); 165 MODULE_PARM_DESC(invert_brightness, 166 "Invert backlight brightness " 167 "(-1 force normal, 0 machine defaults, 1 force inversion), please " 168 "report PCI device ID, subsystem vendor and subsystem device ID " 169 "to dri-devel@lists.freedesktop.org, if your machine needs it. " 170 "It will then be included in an upcoming module version."); 171 172 module_param_named(disable_display, i915.disable_display, bool, 0600); 173 MODULE_PARM_DESC(disable_display, "Disable display (default: false)"); 174 175 module_param_named_unsafe(disable_vtd_wa, i915.disable_vtd_wa, bool, 0600); 176 MODULE_PARM_DESC(disable_vtd_wa, "Disable all VT-d workarounds (default: false)"); 177 178 module_param_named_unsafe(enable_cmd_parser, i915.enable_cmd_parser, int, 0600); 179 MODULE_PARM_DESC(enable_cmd_parser, 180 "Enable command parsing (1=enabled [default], 0=disabled)"); 181 182 module_param_named_unsafe(use_mmio_flip, i915.use_mmio_flip, int, 0600); 183 TUNABLE_INT("drm.i915.use_mmio_flip", &i915.use_mmio_flip); 184 MODULE_PARM_DESC(use_mmio_flip, 185 "use MMIO flips (-1=never, 0=driver discretion [default], 1=always)"); 186 187 module_param_named(mmio_debug, i915.mmio_debug, int, 0600); 188 MODULE_PARM_DESC(mmio_debug, 189 "Enable the MMIO debug code for the first N failures (default: off). " 190 "This may negatively affect performance."); 191 192 module_param_named(verbose_state_checks, i915.verbose_state_checks, bool, 0600); 193 MODULE_PARM_DESC(verbose_state_checks, 194 "Enable verbose logs (ie. WARN_ON()) in case of unexpected hw state conditions."); 195 196 module_param_named_unsafe(nuclear_pageflip, i915.nuclear_pageflip, bool, 0600); 197 MODULE_PARM_DESC(nuclear_pageflip, 198 "Force atomic modeset functionality; asynchronous mode is not yet supported. (default: false)."); 199 200 /* WA to get away with the default setting in VBT for early platforms.Will be removed */ 201 module_param_named_unsafe(edp_vswing, i915.edp_vswing, int, 0400); 202 MODULE_PARM_DESC(edp_vswing, 203 "Ignore/Override vswing pre-emph table selection from VBT " 204 "(0=use value from vbt [default], 1=low power swing(200mV)," 205 "2=default swing(400mV))"); 206 207 module_param_named_unsafe(enable_guc_submission, i915.enable_guc_submission, bool, 0400); 208 MODULE_PARM_DESC(enable_guc_submission, "Enable GuC submission (default:false)"); 209 210 module_param_named(guc_log_level, i915.guc_log_level, int, 0400); 211 MODULE_PARM_DESC(guc_log_level, 212 "GuC firmware logging level (-1:disabled (default), 0-3:enabled)"); 213