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         .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 = -1,
  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 = 1,
  51         .disable_vtd_wa = 0,
  52         .use_mmio_flip = 0,
  53         .mmio_debug = 0,
  54         .verbose_state_checks = 1,
  55 };
  56
  57 module_param_named(modeset, i915.modeset, int, 0400);
  58 MODULE_PARM_DESC(modeset,
  59         "Use kernel modesetting [KMS] (0=DRM_I915_KMS from .config, "
  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(powersave, i915.powersave, int, 0600);
  68 MODULE_PARM_DESC(powersave,
  69         "Enable powersavings, fbc, downclocking, etc. (default: true)");
  70
  71 module_param_named_unsafe(semaphores, i915.semaphores, int, 0400);
  72 MODULE_PARM_DESC(semaphores,
  73         "Use semaphores for inter-ring sync "
  74         "(default: -1 (use per-chip defaults))");
  75
  76 module_param_named_unsafe(enable_rc6, i915.enable_rc6, int, 0400);
  77 MODULE_PARM_DESC(enable_rc6,
  78         "Enable power-saving render C-state 6. "
  79         "Different stages can be selected via bitmask values "
  80         "(0 = disable; 1 = enable rc6; 2 = enable deep rc6; 4 = enable deepest rc6). "
  81         "For example, 3 would enable rc6 and deep rc6, and 7 would enable everything. "
  82         "default: -1 (use per-chip default)");
  83
  84 module_param_named_unsafe(enable_fbc, i915.enable_fbc, int, 0600);
  85 MODULE_PARM_DESC(enable_fbc,
  86         "Enable frame buffer compression for power savings "
  87         "(default: -1 (use per-chip default))");
  88
  89 module_param_named(lvds_downclock, i915.lvds_downclock, int, 0400);
  90 MODULE_PARM_DESC(lvds_downclock,
  91         "Use panel (LVDS/eDP) downclocking for power savings "
  92         "(default: false)");
  93
  94 module_param_named(lvds_channel_mode, i915.lvds_channel_mode, int, 0600);
  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(lvds_use_ssc, i915.panel_use_ssc, int, 0600);
 100 MODULE_PARM_DESC(lvds_use_ssc,
 101         "Use Spread Spectrum Clock with panels [LVDS/eDP] "
 102         "(default: auto from VBT)");
 103
 104 module_param_named(vbt_sdvo_panel_type, i915.vbt_sdvo_panel_type, int, 0600);
 105 MODULE_PARM_DESC(vbt_sdvo_panel_type,
 106         "Override/Ignore selection of SDVO panel mode in the VBT "
 107         "(-2=ignore, -1=auto [default], index in VBT BIOS table)");
 108
 109 module_param_named(reset, i915.reset, bool, 0600);
 110 MODULE_PARM_DESC(reset, "Attempt GPU resets (default: true)");
 111
 112 module_param_named(enable_hangcheck, i915.enable_hangcheck, bool, 0644);
 113 MODULE_PARM_DESC(enable_hangcheck,
 114         "Periodically check GPU activity for detecting hangs. "
 115         "WARNING: Disabling this can cause system wide hangs. "
 116         "(default: true)");
 117
 118 module_param_named_unsafe(enable_ppgtt, i915.enable_ppgtt, int, 0400);
 119 MODULE_PARM_DESC(enable_ppgtt,
 120         "Override PPGTT usage. "
 121         "(-1=auto [default], 0=disabled, 1=aliasing, 2=full)");
 122
 123 module_param_named(enable_execlists, i915.enable_execlists, int, 0400);
 124 MODULE_PARM_DESC(enable_execlists,
 125         "Override execlists usage. "
 126         "(-1=auto [default], 0=disabled, 1=enabled)");
 127
 128 module_param_named(enable_psr, i915.enable_psr, int, 0600);
 129 MODULE_PARM_DESC(enable_psr, "Enable PSR (default: false)");
 130
 131 module_param_named(preliminary_hw_support, i915.preliminary_hw_support, int, 0600);
 132 MODULE_PARM_DESC(preliminary_hw_support,
 133         "Enable preliminary hardware support.");
 134
 135 module_param_named(disable_power_well, i915.disable_power_well, int, 0600);
 136 MODULE_PARM_DESC(disable_power_well,
 137         "Disable the power well when possible (default: true)");
 138
 139 module_param_named(enable_ips, i915.enable_ips, int, 0600);
 140 MODULE_PARM_DESC(enable_ips, "Enable IPS (default: true)");
 141
 142 module_param_named(fastboot, i915.fastboot, bool, 0600);
 143 MODULE_PARM_DESC(fastboot,
 144         "Try to skip unnecessary mode sets at boot time (default: false)");
 145
 146 module_param_named(prefault_disable, i915.prefault_disable, bool, 0600);
 147 MODULE_PARM_DESC(prefault_disable,
 148         "Disable page prefaulting for pread/pwrite/reloc (default:false). "
 149         "For developers only.");
 150
 151 module_param_named(invert_brightness, i915.invert_brightness, int, 0600);
 152 MODULE_PARM_DESC(invert_brightness,
 153         "Invert backlight brightness "
 154         "(-1 force normal, 0 machine defaults, 1 force inversion), please "
 155         "report PCI device ID, subsystem vendor and subsystem device ID "
 156         "to dri-devel@lists.freedesktop.org, if your machine needs it. "
 157         "It will then be included in an upcoming module version.");
 158
 159 module_param_named(disable_display, i915.disable_display, bool, 0600);
 160 MODULE_PARM_DESC(disable_display, "Disable display (default: false)");
 161
 162 module_param_named(disable_vtd_wa, i915.disable_vtd_wa, bool, 0600);
 163 MODULE_PARM_DESC(disable_vtd_wa, "Disable all VT-d workarounds (default: false)");
 164
 165 module_param_named(enable_cmd_parser, i915.enable_cmd_parser, int, 0600);
 166 MODULE_PARM_DESC(enable_cmd_parser,
 167                  "Enable command parsing (1=enabled [default], 0=disabled)");
 168
 169 module_param_named(use_mmio_flip, i915.use_mmio_flip, int, 0600);
 170 MODULE_PARM_DESC(use_mmio_flip,
 171                  "use MMIO flips (-1=never, 0=driver discretion [default], 1=always)");
 172
 173 module_param_named(mmio_debug, i915.mmio_debug, bool, 0600);
 174 MODULE_PARM_DESC(mmio_debug,
 175         "Enable the MMIO debug code (default: false). This may negatively "
 176         "affect performance.");
 177
 178 module_param_named(verbose_state_checks, i915.verbose_state_checks, bool, 0600);
 179 MODULE_PARM_DESC(verbose_state_checks,
 180         "Enable verbose logs (ie. WARN_ON()) in case of unexpected hw state conditions.");