| 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 = true, |
| 47 | .invert_brightness = 0, |
| 48 | .disable_display = 0, |
| 49 | .enable_cmd_parser = 1, |
| 50 | .disable_vtd_wa = 0, |
| 51 | .use_mmio_flip = 0, |
| 52 | .mmio_debug = 0, |
| 53 | .verbose_state_checks = 1, |
| 54 | .edp_vswing = 0, |
| 55 | }; |
| 56 | |
| 57 | module_param_named(modeset, i915.modeset, int, 0400); |
| 58 | MODULE_PARM_DESC(modeset, |
| 59 | "Use kernel modesetting [KMS] (0=disable, " |
| 60 | "1=on, -1=force vga console preference [default])"); |
| 61 | |
| 62 | module_param_named(panel_ignore_lid, i915.panel_ignore_lid, int, 0600); |
| 63 | MODULE_PARM_DESC(panel_ignore_lid, |
| 64 | "Override lid status (0=autodetect, 1=autodetect disabled [default], " |
| 65 | "-1=force lid closed, -2=force lid open)"); |
| 66 | |
| 67 | module_param_named_unsafe(semaphores, i915.semaphores, int, 0400); |
| 68 | MODULE_PARM_DESC(semaphores, |
| 69 | "Use semaphores for inter-ring sync " |
| 70 | "(default: -1 (use per-chip defaults))"); |
| 71 | |
| 72 | module_param_named_unsafe(enable_rc6, i915.enable_rc6, int, 0400); |
| 73 | MODULE_PARM_DESC(enable_rc6, |
| 74 | "Enable power-saving render C-state 6. " |
| 75 | "Different stages can be selected via bitmask values " |
| 76 | "(0 = disable; 1 = enable rc6; 2 = enable deep rc6; 4 = enable deepest rc6). " |
| 77 | "For example, 3 would enable rc6 and deep rc6, and 7 would enable everything. " |
| 78 | "default: -1 (use per-chip default)"); |
| 79 | |
| 80 | module_param_named_unsafe(enable_fbc, i915.enable_fbc, int, 0600); |
| 81 | MODULE_PARM_DESC(enable_fbc, |
| 82 | "Enable frame buffer compression for power savings " |
| 83 | "(default: -1 (use per-chip default))"); |
| 84 | |
| 85 | module_param_named(lvds_channel_mode, i915.lvds_channel_mode, int, 0600); |
| 86 | MODULE_PARM_DESC(lvds_channel_mode, |
| 87 | "Specify LVDS channel mode " |
| 88 | "(0=probe BIOS [default], 1=single-channel, 2=dual-channel)"); |
| 89 | |
| 90 | module_param_named(lvds_use_ssc, i915.panel_use_ssc, int, 0600); |
| 91 | MODULE_PARM_DESC(lvds_use_ssc, |
| 92 | "Use Spread Spectrum Clock with panels [LVDS/eDP] " |
| 93 | "(default: auto from VBT)"); |
| 94 | |
| 95 | module_param_named(vbt_sdvo_panel_type, i915.vbt_sdvo_panel_type, int, 0600); |
| 96 | MODULE_PARM_DESC(vbt_sdvo_panel_type, |
| 97 | "Override/Ignore selection of SDVO panel mode in the VBT " |
| 98 | "(-2=ignore, -1=auto [default], index in VBT BIOS table)"); |
| 99 | |
| 100 | module_param_named_unsafe(reset, i915.reset, bool, 0600); |
| 101 | MODULE_PARM_DESC(reset, "Attempt GPU resets (default: true)"); |
| 102 | |
| 103 | module_param_named(enable_hangcheck, i915.enable_hangcheck, bool, 0644); |
| 104 | MODULE_PARM_DESC(enable_hangcheck, |
| 105 | "Periodically check GPU activity for detecting hangs. " |
| 106 | "WARNING: Disabling this can cause system wide hangs. " |
| 107 | "(default: true)"); |
| 108 | |
| 109 | module_param_named_unsafe(enable_ppgtt, i915.enable_ppgtt, int, 0400); |
| 110 | MODULE_PARM_DESC(enable_ppgtt, |
| 111 | "Override PPGTT usage. " |
| 112 | "(-1=auto [default], 0=disabled, 1=aliasing, 2=full)"); |
| 113 | |
| 114 | module_param_named(enable_execlists, i915.enable_execlists, int, 0400); |
| 115 | MODULE_PARM_DESC(enable_execlists, |
| 116 | "Override execlists usage. " |
| 117 | "(-1=auto [default], 0=disabled, 1=enabled)"); |
| 118 | |
| 119 | module_param_named(enable_psr, i915.enable_psr, int, 0600); |
| 120 | MODULE_PARM_DESC(enable_psr, "Enable PSR (default: false)"); |
| 121 | |
| 122 | module_param_named(preliminary_hw_support, i915.preliminary_hw_support, int, 0600); |
| 123 | MODULE_PARM_DESC(preliminary_hw_support, |
| 124 | "Enable preliminary hardware support."); |
| 125 | |
| 126 | module_param_named(disable_power_well, i915.disable_power_well, int, 0600); |
| 127 | MODULE_PARM_DESC(disable_power_well, |
| 128 | "Disable the power well when possible (default: true)"); |
| 129 | |
| 130 | module_param_named(enable_ips, i915.enable_ips, int, 0600); |
| 131 | MODULE_PARM_DESC(enable_ips, "Enable IPS (default: true)"); |
| 132 | |
| 133 | module_param_named(fastboot, i915.fastboot, bool, 0600); |
| 134 | MODULE_PARM_DESC(fastboot, |
| 135 | "Try to skip unnecessary mode sets at boot time (default: false)"); |
| 136 | |
| 137 | module_param_named_unsafe(prefault_disable, i915.prefault_disable, bool, 0600); |
| 138 | MODULE_PARM_DESC(prefault_disable, |
| 139 | "Disable page prefaulting for pread/pwrite/reloc (default:false). " |
| 140 | "For developers only."); |
| 141 | |
| 142 | module_param_named_unsafe(load_detect_test, i915.load_detect_test, bool, 0600); |
| 143 | MODULE_PARM_DESC(load_detect_test, |
| 144 | "Force-enable the VGA load detect code for testing (default:false). " |
| 145 | "For developers only."); |
| 146 | |
| 147 | module_param_named(invert_brightness, i915.invert_brightness, int, 0600); |
| 148 | MODULE_PARM_DESC(invert_brightness, |
| 149 | "Invert backlight brightness " |
| 150 | "(-1 force normal, 0 machine defaults, 1 force inversion), please " |
| 151 | "report PCI device ID, subsystem vendor and subsystem device ID " |
| 152 | "to dri-devel@lists.freedesktop.org, if your machine needs it. " |
| 153 | "It will then be included in an upcoming module version."); |
| 154 | |
| 155 | module_param_named(disable_display, i915.disable_display, bool, 0600); |
| 156 | MODULE_PARM_DESC(disable_display, "Disable display (default: false)"); |
| 157 | |
| 158 | module_param_named(disable_vtd_wa, i915.disable_vtd_wa, bool, 0600); |
| 159 | MODULE_PARM_DESC(disable_vtd_wa, "Disable all VT-d workarounds (default: false)"); |
| 160 | |
| 161 | module_param_named(enable_cmd_parser, i915.enable_cmd_parser, int, 0600); |
| 162 | MODULE_PARM_DESC(enable_cmd_parser, |
| 163 | "Enable command parsing (1=enabled [default], 0=disabled)"); |
| 164 | |
| 165 | module_param_named(use_mmio_flip, i915.use_mmio_flip, int, 0600); |
| 166 | MODULE_PARM_DESC(use_mmio_flip, |
| 167 | "use MMIO flips (-1=never, 0=driver discretion [default], 1=always)"); |
| 168 | |
| 169 | module_param_named(mmio_debug, i915.mmio_debug, int, 0600); |
| 170 | MODULE_PARM_DESC(mmio_debug, |
| 171 | "Enable the MMIO debug code for the first N failures (default: off). " |
| 172 | "This may negatively affect performance."); |
| 173 | |
| 174 | module_param_named(verbose_state_checks, i915.verbose_state_checks, bool, 0600); |
| 175 | MODULE_PARM_DESC(verbose_state_checks, |
| 176 | "Enable verbose logs (ie. WARN_ON()) in case of unexpected hw state conditions."); |
| 177 | |
| 178 | /* WA to get away with the default setting in VBT for early platforms.Will be removed */ |
| 179 | module_param_named_unsafe(edp_vswing, i915.edp_vswing, int, 0400); |
| 180 | MODULE_PARM_DESC(edp_vswing, |
| 181 | "Ignore/Override vswing pre-emph table selection from VBT " |
| 182 | "(0=use value from vbt [default], 1=low power swing(200mV)," |
| 183 | "2=default swing(400mV))"); |