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_params.h" 26 #include "i915_drv.h" 27 28 struct i915_params i915 __read_mostly = { 29 .modeset = -1, 30 .panel_ignore_lid = 1, 31 .semaphores = -1, 32 .lvds_channel_mode = 0, 33 .panel_use_ssc = -1, 34 .vbt_sdvo_panel_type = -1, 35 .enable_rc6 = -1, 36 .enable_dc = -1, 37 .enable_fbc = -1, 38 .enable_execlists = -1, 39 .enable_hangcheck = true, 40 .enable_ppgtt = -1, 41 .enable_psr = -1, 42 .alpha_support = IS_ENABLED(CONFIG_DRM_I915_ALPHA_SUPPORT), 43 .disable_power_well = -1, 44 .enable_ips = 1, 45 .fastboot = 0, 46 .prefault_disable = 0, 47 .load_detect_test = 0, 48 .force_reset_modeset_test = 0, 49 .reset = true, 50 .error_capture = true, 51 .invert_brightness = 0, 52 .disable_display = 0, 53 .enable_cmd_parser = 1, 54 .use_mmio_flip = 0, 55 .mmio_debug = 0, 56 .verbose_state_checks = 1, 57 .nuclear_pageflip = 0, 58 .edp_vswing = 0, 59 .enable_guc_loading = 0, 60 .enable_guc_submission = 0, 61 .guc_log_level = -1, 62 .enable_dp_mst = true, 63 .inject_load_failure = 0, 64 .enable_dpcd_backlight = false, 65 .enable_gvt = false, 66 }; 67 68 module_param_named(modeset, i915.modeset, int, 0400); 69 MODULE_PARM_DESC(modeset, 70 "Use kernel modesetting [KMS] (0=disable, " 71 "1=on, -1=force vga console preference [default])"); 72 73 module_param_named_unsafe(panel_ignore_lid, i915.panel_ignore_lid, int, 0600); 74 MODULE_PARM_DESC(panel_ignore_lid, 75 "Override lid status (0=autodetect, 1=autodetect disabled [default], " 76 "-1=force lid closed, -2=force lid open)"); 77 78 module_param_named_unsafe(semaphores, i915.semaphores, int, 0400); 79 MODULE_PARM_DESC(semaphores, 80 "Use semaphores for inter-ring sync " 81 "(default: -1 (use per-chip defaults))"); 82 83 module_param_named_unsafe(enable_rc6, i915.enable_rc6, int, 0400); 84 MODULE_PARM_DESC(enable_rc6, 85 "Enable power-saving render C-state 6. " 86 "Different stages can be selected via bitmask values " 87 "(0 = disable; 1 = enable rc6; 2 = enable deep rc6; 4 = enable deepest rc6). " 88 "For example, 3 would enable rc6 and deep rc6, and 7 would enable everything. " 89 "default: -1 (use per-chip default)"); 90 91 module_param_named_unsafe(enable_dc, i915.enable_dc, int, 0400); 92 MODULE_PARM_DESC(enable_dc, 93 "Enable power-saving display C-states. " 94 "(-1=auto [default]; 0=disable; 1=up to DC5; 2=up to DC6)"); 95 96 module_param_named_unsafe(enable_fbc, i915.enable_fbc, int, 0600); 97 MODULE_PARM_DESC(enable_fbc, 98 "Enable frame buffer compression for power savings " 99 "(default: -1 (use per-chip default))"); 100 101 module_param_named_unsafe(lvds_channel_mode, i915.lvds_channel_mode, int, 0400); 102 MODULE_PARM_DESC(lvds_channel_mode, 103 "Specify LVDS channel mode " 104 "(0=probe BIOS [default], 1=single-channel, 2=dual-channel)"); 105 106 module_param_named_unsafe(lvds_use_ssc, i915.panel_use_ssc, int, 0600); 107 MODULE_PARM_DESC(lvds_use_ssc, 108 "Use Spread Spectrum Clock with panels [LVDS/eDP] " 109 "(default: auto from VBT)"); 110 111 module_param_named_unsafe(vbt_sdvo_panel_type, i915.vbt_sdvo_panel_type, int, 0400); 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_unsafe(reset, i915.reset, bool, 0600); 117 MODULE_PARM_DESC(reset, "Attempt GPU resets (default: true)"); 118 119 #if IS_ENABLED(CONFIG_DRM_I915_CAPTURE_ERROR) 120 module_param_named(error_capture, i915.error_capture, bool, 0600); 121 MODULE_PARM_DESC(error_capture, 122 "Record the GPU state following a hang. " 123 "This information in /sys/class/drm/card<N>/error is vital for " 124 "triaging and debugging hangs."); 125 #endif 126 127 module_param_named_unsafe(enable_hangcheck, i915.enable_hangcheck, bool, 0644); 128 MODULE_PARM_DESC(enable_hangcheck, 129 "Periodically check GPU activity for detecting hangs. " 130 "WARNING: Disabling this can cause system wide hangs. " 131 "(default: true)"); 132 133 module_param_named_unsafe(enable_ppgtt, i915.enable_ppgtt, int, 0400); 134 MODULE_PARM_DESC(enable_ppgtt, 135 "Override PPGTT usage. " 136 "(-1=auto [default], 0=disabled, 1=aliasing, 2=full, 3=full with extended address space)"); 137 138 module_param_named_unsafe(enable_execlists, i915.enable_execlists, int, 0400); 139 MODULE_PARM_DESC(enable_execlists, 140 "Override execlists usage. " 141 "(-1=auto [default], 0=disabled, 1=enabled)"); 142 143 module_param_named_unsafe(enable_psr, i915.enable_psr, int, 0600); 144 MODULE_PARM_DESC(enable_psr, "Enable PSR " 145 "(0=disabled, 1=enabled - link mode chosen per-platform, 2=force link-standby mode, 3=force link-off mode) " 146 "Default: -1 (use per-chip default)"); 147 148 module_param_named_unsafe(alpha_support, i915.alpha_support, int, 0400); 149 MODULE_PARM_DESC(alpha_support, 150 "Enable alpha quality driver support for latest hardware. " 151 "See also CONFIG_DRM_I915_ALPHA_SUPPORT."); 152 153 module_param_named_unsafe(disable_power_well, i915.disable_power_well, int, 0400); 154 MODULE_PARM_DESC(disable_power_well, 155 "Disable display power wells when possible " 156 "(-1=auto [default], 0=power wells always on, 1=power wells disabled when possible)"); 157 158 module_param_named_unsafe(enable_ips, i915.enable_ips, int, 0600); 159 MODULE_PARM_DESC(enable_ips, "Enable IPS (default: true)"); 160 161 module_param_named(fastboot, i915.fastboot, bool, 0600); 162 MODULE_PARM_DESC(fastboot, 163 "Try to skip unnecessary mode sets at boot time (default: false)"); 164 165 module_param_named_unsafe(prefault_disable, i915.prefault_disable, bool, 0600); 166 MODULE_PARM_DESC(prefault_disable, 167 "Disable page prefaulting for pread/pwrite/reloc (default:false). " 168 "For developers only."); 169 170 module_param_named_unsafe(load_detect_test, i915.load_detect_test, bool, 0600); 171 MODULE_PARM_DESC(load_detect_test, 172 "Force-enable the VGA load detect code for testing (default:false). " 173 "For developers only."); 174 175 module_param_named_unsafe(force_reset_modeset_test, i915.force_reset_modeset_test, bool, 0600); 176 MODULE_PARM_DESC(force_reset_modeset_test, 177 "Force a modeset during gpu reset for testing (default:false). " 178 "For developers only."); 179 180 module_param_named_unsafe(invert_brightness, i915.invert_brightness, int, 0600); 181 MODULE_PARM_DESC(invert_brightness, 182 "Invert backlight brightness " 183 "(-1 force normal, 0 machine defaults, 1 force inversion), please " 184 "report PCI device ID, subsystem vendor and subsystem device ID " 185 "to dri-devel@lists.freedesktop.org, if your machine needs it. " 186 "It will then be included in an upcoming module version."); 187 188 module_param_named(disable_display, i915.disable_display, bool, 0400); 189 MODULE_PARM_DESC(disable_display, "Disable display (default: false)"); 190 191 module_param_named_unsafe(enable_cmd_parser, i915.enable_cmd_parser, int, 0600); 192 MODULE_PARM_DESC(enable_cmd_parser, 193 "Enable command parsing (1=enabled [default], 0=disabled)"); 194 195 module_param_named_unsafe(use_mmio_flip, i915.use_mmio_flip, int, 0600); 196 MODULE_PARM_DESC(use_mmio_flip, 197 "use MMIO flips (-1=never, 0=driver discretion [default], 1=always)"); 198 199 module_param_named(mmio_debug, i915.mmio_debug, int, 0600); 200 MODULE_PARM_DESC(mmio_debug, 201 "Enable the MMIO debug code for the first N failures (default: off). " 202 "This may negatively affect performance."); 203 204 module_param_named(verbose_state_checks, i915.verbose_state_checks, bool, 0600); 205 MODULE_PARM_DESC(verbose_state_checks, 206 "Enable verbose logs (ie. WARN_ON()) in case of unexpected hw state conditions."); 207 208 module_param_named_unsafe(nuclear_pageflip, i915.nuclear_pageflip, bool, 0600); 209 MODULE_PARM_DESC(nuclear_pageflip, 210 "Force atomic modeset functionality; asynchronous mode is not yet supported. (default: false)."); 211 212 /* WA to get away with the default setting in VBT for early platforms.Will be removed */ 213 module_param_named_unsafe(edp_vswing, i915.edp_vswing, int, 0400); 214 MODULE_PARM_DESC(edp_vswing, 215 "Ignore/Override vswing pre-emph table selection from VBT " 216 "(0=use value from vbt [default], 1=low power swing(200mV)," 217 "2=default swing(400mV))"); 218 219 module_param_named_unsafe(enable_guc_loading, i915.enable_guc_loading, int, 0400); 220 MODULE_PARM_DESC(enable_guc_loading, 221 "Enable GuC firmware loading " 222 "(-1=auto, 0=never [default], 1=if available, 2=required)"); 223 224 module_param_named_unsafe(enable_guc_submission, i915.enable_guc_submission, int, 0400); 225 MODULE_PARM_DESC(enable_guc_submission, 226 "Enable GuC submission " 227 "(-1=auto, 0=never [default], 1=if available, 2=required)"); 228 229 module_param_named(guc_log_level, i915.guc_log_level, int, 0400); 230 MODULE_PARM_DESC(guc_log_level, 231 "GuC firmware logging level (-1:disabled (default), 0-3:enabled)"); 232 233 module_param_named_unsafe(enable_dp_mst, i915.enable_dp_mst, bool, 0600); 234 MODULE_PARM_DESC(enable_dp_mst, 235 "Enable multi-stream transport (MST) for new DisplayPort sinks. (default: true)"); 236 module_param_named_unsafe(inject_load_failure, i915.inject_load_failure, uint, 0400); 237 MODULE_PARM_DESC(inject_load_failure, 238 "Force an error after a number of failure check points (0:disabled (default), N:force failure at the Nth failure check point)"); 239 module_param_named(enable_dpcd_backlight, i915.enable_dpcd_backlight, bool, 0600); 240 MODULE_PARM_DESC(enable_dpcd_backlight, 241 "Enable support for DPCD backlight control (default:false)"); 242 243 module_param_named(enable_gvt, i915.enable_gvt, bool, 0400); 244 MODULE_PARM_DESC(enable_gvt, 245 "Enable support for Intel GVT-g graphics virtualization host support(default:false)"); 246