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  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.         .powersave = 1,
  31.         .semaphores = -1,
  32.         .lvds_downclock = 0,
  33.         .lvds_channel_mode = 0,
  34.         .panel_use_ssc = -1,
  35.         .vbt_sdvo_panel_type = -1,
  36.         .enable_rc6 = -1,
  37.         .enable_fbc = -1,
  38.         .enable_execlists = 0,
  39.         .enable_hangcheck = true,
  40.     .enable_ppgtt = 1,
  41.         .enable_psr = 0,
  42.         .preliminary_hw_support = IS_ENABLED(CONFIG_DRM_I915_PRELIMINARY_HW_SUPPORT),
  43.         .disable_power_well = 1,
  44.         .enable_ips = 1,
  45.         .fastboot = 0,
  46.         .prefault_disable = 0,
  47.         .reset = true,
  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. };
  55.  
  56. module_param_named(modeset, i915.modeset, int, 0400);
  57. MODULE_PARM_DESC(modeset,
  58.         "Use kernel modesetting [KMS] (0=DRM_I915_KMS from .config, "
  59.         "1=on, -1=force vga console preference [default])");
  60.  
  61. module_param_named(panel_ignore_lid, i915.panel_ignore_lid, int, 0600);
  62. MODULE_PARM_DESC(panel_ignore_lid,
  63.         "Override lid status (0=autodetect, 1=autodetect disabled [default], "
  64.         "-1=force lid closed, -2=force lid open)");
  65.  
  66. module_param_named(powersave, i915.powersave, int, 0600);
  67. MODULE_PARM_DESC(powersave,
  68.         "Enable powersavings, fbc, downclocking, etc. (default: true)");
  69.  
  70. module_param_named_unsafe(semaphores, i915.semaphores, int, 0400);
  71. MODULE_PARM_DESC(semaphores,
  72.         "Use semaphores for inter-ring sync "
  73.         "(default: -1 (use per-chip defaults))");
  74.  
  75. module_param_named_unsafe(enable_rc6, i915.enable_rc6, int, 0400);
  76. MODULE_PARM_DESC(enable_rc6,
  77.         "Enable power-saving render C-state 6. "
  78.         "Different stages can be selected via bitmask values "
  79.         "(0 = disable; 1 = enable rc6; 2 = enable deep rc6; 4 = enable deepest rc6). "
  80.         "For example, 3 would enable rc6 and deep rc6, and 7 would enable everything. "
  81.         "default: -1 (use per-chip default)");
  82.  
  83. module_param_named_unsafe(enable_fbc, i915.enable_fbc, int, 0600);
  84. MODULE_PARM_DESC(enable_fbc,
  85.         "Enable frame buffer compression for power savings "
  86.         "(default: -1 (use per-chip default))");
  87.  
  88. module_param_named(lvds_downclock, i915.lvds_downclock, int, 0400);
  89. MODULE_PARM_DESC(lvds_downclock,
  90.         "Use panel (LVDS/eDP) downclocking for power savings "
  91.         "(default: false)");
  92.  
  93. module_param_named(lvds_channel_mode, i915.lvds_channel_mode, int, 0600);
  94. MODULE_PARM_DESC(lvds_channel_mode,
  95.          "Specify LVDS channel mode "
  96.          "(0=probe BIOS [default], 1=single-channel, 2=dual-channel)");
  97.  
  98. module_param_named(lvds_use_ssc, i915.panel_use_ssc, int, 0600);
  99. MODULE_PARM_DESC(lvds_use_ssc,
  100.         "Use Spread Spectrum Clock with panels [LVDS/eDP] "
  101.         "(default: auto from VBT)");
  102.  
  103. module_param_named(vbt_sdvo_panel_type, i915.vbt_sdvo_panel_type, int, 0600);
  104. MODULE_PARM_DESC(vbt_sdvo_panel_type,
  105.         "Override/Ignore selection of SDVO panel mode in the VBT "
  106.         "(-2=ignore, -1=auto [default], index in VBT BIOS table)");
  107.  
  108. module_param_named(reset, i915.reset, bool, 0600);
  109. MODULE_PARM_DESC(reset, "Attempt GPU resets (default: true)");
  110.  
  111. module_param_named(enable_hangcheck, i915.enable_hangcheck, bool, 0644);
  112. MODULE_PARM_DESC(enable_hangcheck,
  113.         "Periodically check GPU activity for detecting hangs. "
  114.         "WARNING: Disabling this can cause system wide hangs. "
  115.         "(default: true)");
  116.  
  117. module_param_named_unsafe(enable_ppgtt, i915.enable_ppgtt, int, 0400);
  118. MODULE_PARM_DESC(enable_ppgtt,
  119.         "Override PPGTT usage. "
  120.         "(-1=auto [default], 0=disabled, 1=aliasing, 2=full)");
  121.  
  122. module_param_named(enable_execlists, i915.enable_execlists, int, 0400);
  123. MODULE_PARM_DESC(enable_execlists,
  124.         "Override execlists usage. "
  125.         "(-1=auto, 0=disabled [default], 1=enabled)");
  126.  
  127. module_param_named(enable_psr, i915.enable_psr, int, 0600);
  128. MODULE_PARM_DESC(enable_psr, "Enable PSR (default: false)");
  129.  
  130. module_param_named(preliminary_hw_support, i915.preliminary_hw_support, int, 0600);
  131. MODULE_PARM_DESC(preliminary_hw_support,
  132.         "Enable preliminary hardware support.");
  133.  
  134. module_param_named(disable_power_well, i915.disable_power_well, int, 0600);
  135. MODULE_PARM_DESC(disable_power_well,
  136.         "Disable the power well when possible (default: true)");
  137.  
  138. module_param_named(enable_ips, i915.enable_ips, int, 0600);
  139. MODULE_PARM_DESC(enable_ips, "Enable IPS (default: true)");
  140.  
  141. module_param_named(fastboot, i915.fastboot, bool, 0600);
  142. MODULE_PARM_DESC(fastboot,
  143.         "Try to skip unnecessary mode sets at boot time (default: false)");
  144.  
  145. module_param_named(prefault_disable, i915.prefault_disable, bool, 0600);
  146. MODULE_PARM_DESC(prefault_disable,
  147.         "Disable page prefaulting for pread/pwrite/reloc (default:false). "
  148.         "For developers only.");
  149.  
  150. module_param_named(invert_brightness, i915.invert_brightness, int, 0600);
  151. MODULE_PARM_DESC(invert_brightness,
  152.         "Invert backlight brightness "
  153.         "(-1 force normal, 0 machine defaults, 1 force inversion), please "
  154.         "report PCI device ID, subsystem vendor and subsystem device ID "
  155.         "to dri-devel@lists.freedesktop.org, if your machine needs it. "
  156.         "It will then be included in an upcoming module version.");
  157.  
  158. module_param_named(disable_display, i915.disable_display, bool, 0600);
  159. MODULE_PARM_DESC(disable_display, "Disable display (default: false)");
  160.  
  161. module_param_named(disable_vtd_wa, i915.disable_vtd_wa, bool, 0600);
  162. MODULE_PARM_DESC(disable_vtd_wa, "Disable all VT-d workarounds (default: false)");
  163.  
  164. module_param_named(enable_cmd_parser, i915.enable_cmd_parser, int, 0600);
  165. MODULE_PARM_DESC(enable_cmd_parser,
  166.                  "Enable command parsing (1=enabled [default], 0=disabled)");
  167.  
  168. module_param_named(use_mmio_flip, i915.use_mmio_flip, int, 0600);
  169. MODULE_PARM_DESC(use_mmio_flip,
  170.                  "use MMIO flips (-1=never, 0=driver discretion [default], 1=always)");
  171.  
  172. module_param_named(mmio_debug, i915.mmio_debug, bool, 0600);
  173. MODULE_PARM_DESC(mmio_debug,
  174.         "Enable the MMIO debug code (default: false). This may negatively "
  175.         "affect performance.");
  176.