drivers/gpu/drm/i915/i915_params.c

   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 = true,
  48         .invert_brightness = 0,
  49         .disable_display = 0,
  50         .enable_cmd_parser = 1,
  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 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 MODULE_PARM_DESC(panel_ignore_lid,
  66         "Override lid status (0=autodetect, 1=autodetect disabled [default], "
  67         "-1=force lid closed, -2=force lid open)");
  68
  69 module_param_named_unsafe(semaphores, i915.semaphores, int, 0400);
  70 MODULE_PARM_DESC(semaphores,
  71         "Use semaphores for inter-ring sync "
  72         "(default: -1 (use per-chip defaults))");
  73
  74 module_param_named_unsafe(enable_rc6, i915.enable_rc6, int, 0400);
  75 MODULE_PARM_DESC(enable_rc6,
  76         "Enable power-saving render C-state 6. "
  77         "Different stages can be selected via bitmask values "
  78         "(0 = disable; 1 = enable rc6; 2 = enable deep rc6; 4 = enable deepest rc6). "
  79         "For example, 3 would enable rc6 and deep rc6, and 7 would enable everything. "
  80         "default: -1 (use per-chip default)");
  81
  82 module_param_named_unsafe(enable_fbc, i915.enable_fbc, int, 0600);
  83 MODULE_PARM_DESC(enable_fbc,
  84         "Enable frame buffer compression for power savings "
  85         "(default: -1 (use per-chip default))");
  86
  87 module_param_named(lvds_downclock, i915.lvds_downclock, int, 0400);
  88 MODULE_PARM_DESC(lvds_downclock,
  89         "Use panel (LVDS/eDP) downclocking for power savings "
  90         "(default: false)");
  91
  92 module_param_named(lvds_channel_mode, i915.lvds_channel_mode, int, 0600);
  93 MODULE_PARM_DESC(lvds_channel_mode,
  94          "Specify LVDS channel mode "
  95          "(0=probe BIOS [default], 1=single-channel, 2=dual-channel)");
  96
  97 module_param_named(lvds_use_ssc, i915.panel_use_ssc, int, 0600);
  98 MODULE_PARM_DESC(lvds_use_ssc,
  99         "Use Spread Spectrum Clock with panels [LVDS/eDP] "
 100         "(default: auto from VBT)");
 101
 102 module_param_named(vbt_sdvo_panel_type, i915.vbt_sdvo_panel_type, int, 0600);
 103 MODULE_PARM_DESC(vbt_sdvo_panel_type,
 104         "Override/Ignore selection of SDVO panel mode in the VBT "
 105         "(-2=ignore, -1=auto [default], index in VBT BIOS table)");
 106
 107 module_param_named(reset, i915.reset, bool, 0600);
 108 MODULE_PARM_DESC(reset, "Attempt GPU resets (default: true)");
 109
 110 module_param_named(enable_hangcheck, i915.enable_hangcheck, bool, 0644);
 111 MODULE_PARM_DESC(enable_hangcheck,
 112         "Periodically check GPU activity for detecting hangs. "
 113         "WARNING: Disabling this can cause system wide hangs. "
 114         "(default: true)");
 115
 116 module_param_named_unsafe(enable_ppgtt, i915.enable_ppgtt, int, 0400);
 117 MODULE_PARM_DESC(enable_ppgtt,
 118         "Override PPGTT usage. "
 119         "(-1=auto [default], 0=disabled, 1=aliasing, 2=full)");
 120
 121 module_param_named(enable_execlists, i915.enable_execlists, int, 0400);
 122 MODULE_PARM_DESC(enable_execlists,
 123         "Override execlists usage. "
 124         "(-1=auto [default], 0=disabled, 1=enabled)");
 125
 126 module_param_named(enable_psr, i915.enable_psr, int, 0600);
 127 MODULE_PARM_DESC(enable_psr, "Enable PSR (default: false)");
 128
 129 module_param_named(preliminary_hw_support, i915.preliminary_hw_support, int, 0600);
 130 MODULE_PARM_DESC(preliminary_hw_support,
 131         "Enable preliminary hardware support.");
 132
 133 module_param_named(disable_power_well, i915.disable_power_well, int, 0600);
 134 MODULE_PARM_DESC(disable_power_well,
 135         "Disable the power well when possible (default: true)");
 136
 137 module_param_named(enable_ips, i915.enable_ips, int, 0600);
 138 MODULE_PARM_DESC(enable_ips, "Enable IPS (default: true)");
 139
 140 module_param_named(fastboot, i915.fastboot, bool, 0600);
 141 MODULE_PARM_DESC(fastboot,
 142         "Try to skip unnecessary mode sets at boot time (default: false)");
 143
 144 module_param_named_unsafe(prefault_disable, i915.prefault_disable, bool, 0600);
 145 MODULE_PARM_DESC(prefault_disable,
 146         "Disable page prefaulting for pread/pwrite/reloc (default:false). "
 147         "For developers only.");
 148
 149 module_param_named_unsafe(load_detect_test, i915.load_detect_test, bool, 0600);
 150 MODULE_PARM_DESC(load_detect_test,
 151         "Force-enable the VGA load detect code for testing (default:false). "
 152         "For developers only.");
 153
 154 module_param_named(invert_brightness, i915.invert_brightness, int, 0600);
 155 MODULE_PARM_DESC(invert_brightness,
 156         "Invert backlight brightness "
 157         "(-1 force normal, 0 machine defaults, 1 force inversion), please "
 158         "report PCI device ID, subsystem vendor and subsystem device ID "
 159         "to dri-devel@lists.freedesktop.org, if your machine needs it. "
 160         "It will then be included in an upcoming module version.");
 161
 162 module_param_named(disable_display, i915.disable_display, bool, 0600);
 163 MODULE_PARM_DESC(disable_display, "Disable display (default: false)");
 164
 165 module_param_named(disable_vtd_wa, i915.disable_vtd_wa, bool, 0600);
 166 MODULE_PARM_DESC(disable_vtd_wa, "Disable all VT-d workarounds (default: false)");
 167
 168 module_param_named(enable_cmd_parser, i915.enable_cmd_parser, int, 0600);
 169 MODULE_PARM_DESC(enable_cmd_parser,
 170                  "Enable command parsing (1=enabled [default], 0=disabled)");
 171
 172 module_param_named(use_mmio_flip, i915.use_mmio_flip, int, 0600);
 173 MODULE_PARM_DESC(use_mmio_flip,
 174                  "use MMIO flips (-1=never, 0=driver discretion [default], 1=always)");
 175
 176 module_param_named(mmio_debug, i915.mmio_debug, int, 0600);
 177 MODULE_PARM_DESC(mmio_debug,
 178         "Enable the MMIO debug code for the first N failures (default: off). "
 179         "This may negatively affect performance.");
 180
 181 module_param_named(verbose_state_checks, i915.verbose_state_checks, bool, 0600);
 182 MODULE_PARM_DESC(verbose_state_checks,
 183         "Enable verbose logs (ie. WARN_ON()) in case of unexpected hw state conditions.");
 184
 185 module_param_named_unsafe(nuclear_pageflip, i915.nuclear_pageflip, bool, 0600);
 186 MODULE_PARM_DESC(nuclear_pageflip,
 187                  "Force atomic modeset functionality; only planes work for now (default: false).");
 188
 189 /* WA to get away with the default setting in VBT for early platforms.Will be removed */
 190 module_param_named_unsafe(edp_vswing, i915.edp_vswing, int, 0400);
 191 MODULE_PARM_DESC(edp_vswing,
 192                  "Ignore/Override vswing pre-emph table selection from VBT "
 193                  "(0=use value from vbt [default], 1=low power swing(200mV),"
 194                  "2=default swing(400mV))");