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_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         .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         .load_detect_test = 0,
  48         .reset = true,
  49         .invert_brightness = 0,
  50         .disable_display = 0,
  51         .enable_cmd_parser = 1,
  52         .use_mmio_flip = 0,
  53         .mmio_debug = 0,
  54         .verbose_state_checks = 1,
  55         .nuclear_pageflip = 0,
  56         .edp_vswing = 0,
  57         .enable_guc_loading = 0,
  58         .enable_guc_submission = 0,
  59         .guc_log_level = -1,
  60         .enable_dp_mst = true,
  61         .inject_load_failure = 0,
  62         .enable_dpcd_backlight = false,
  63         .enable_gvt = false,
  64 };
  65
  66 module_param_named(modeset, i915.modeset, int, 0400);
  67 MODULE_PARM_DESC(modeset,
  68         "Use kernel modesetting [KMS] (0=disable, "
  69         "1=on, -1=force vga console preference [default])");
  70
  71 module_param_named_unsafe(panel_ignore_lid, i915.panel_ignore_lid, int, 0600);
  72 MODULE_PARM_DESC(panel_ignore_lid,
  73         "Override lid status (0=autodetect, 1=autodetect disabled [default], "
  74         "-1=force lid closed, -2=force lid open)");
  75
  76 module_param_named_unsafe(semaphores, i915.semaphores, int, 0400);
  77 MODULE_PARM_DESC(semaphores,
  78         "Use semaphores for inter-ring sync "
  79         "(default: -1 (use per-chip defaults))");
  80
  81 module_param_named_unsafe(enable_rc6, i915.enable_rc6, int, 0400);
  82 MODULE_PARM_DESC(enable_rc6,
  83         "Enable power-saving render C-state 6. "
  84         "Different stages can be selected via bitmask values "
  85         "(0 = disable; 1 = enable rc6; 2 = enable deep rc6; 4 = enable deepest rc6). "
  86         "For example, 3 would enable rc6 and deep rc6, and 7 would enable everything. "
  87         "default: -1 (use per-chip default)");
  88
  89 module_param_named_unsafe(enable_dc, i915.enable_dc, int, 0400);
  90 MODULE_PARM_DESC(enable_dc,
  91         "Enable power-saving display C-states. "
  92         "(-1=auto [default]; 0=disable; 1=up to DC5; 2=up to DC6)");
  93
  94 module_param_named_unsafe(enable_fbc, i915.enable_fbc, int, 0600);
  95 MODULE_PARM_DESC(enable_fbc,
  96         "Enable frame buffer compression for power savings "
  97         "(default: -1 (use per-chip default))");
  98
  99 module_param_named_unsafe(lvds_channel_mode, i915.lvds_channel_mode, int, 0400);
 100 MODULE_PARM_DESC(lvds_channel_mode,
 101          "Specify LVDS channel mode "
 102          "(0=probe BIOS [default], 1=single-channel, 2=dual-channel)");
 103
 104 module_param_named_unsafe(lvds_use_ssc, i915.panel_use_ssc, int, 0600);
 105 MODULE_PARM_DESC(lvds_use_ssc,
 106         "Use Spread Spectrum Clock with panels [LVDS/eDP] "
 107         "(default: auto from VBT)");
 108
 109 module_param_named_unsafe(vbt_sdvo_panel_type, i915.vbt_sdvo_panel_type, int, 0400);
 110 MODULE_PARM_DESC(vbt_sdvo_panel_type,
 111         "Override/Ignore selection of SDVO panel mode in the VBT "
 112         "(-2=ignore, -1=auto [default], index in VBT BIOS table)");
 113
 114 module_param_named_unsafe(reset, i915.reset, bool, 0600);
 115 MODULE_PARM_DESC(reset, "Attempt GPU resets (default: true)");
 116
 117 module_param_named_unsafe(enable_hangcheck, i915.enable_hangcheck, bool, 0644);
 118 MODULE_PARM_DESC(enable_hangcheck,
 119         "Periodically check GPU activity for detecting hangs. "
 120         "WARNING: Disabling this can cause system wide hangs. "
 121         "(default: true)");
 122
 123 module_param_named_unsafe(enable_ppgtt, i915.enable_ppgtt, int, 0400);
 124 MODULE_PARM_DESC(enable_ppgtt,
 125         "Override PPGTT usage. "
 126         "(-1=auto [default], 0=disabled, 1=aliasing, 2=full, 3=full with extended address space)");
 127
 128 module_param_named_unsafe(enable_execlists, i915.enable_execlists, int, 0400);
 129 MODULE_PARM_DESC(enable_execlists,
 130         "Override execlists usage. "
 131         "(-1=auto [default], 0=disabled, 1=enabled)");
 132
 133 module_param_named_unsafe(enable_psr, i915.enable_psr, int, 0600);
 134 MODULE_PARM_DESC(enable_psr, "Enable PSR "
 135                  "(0=disabled, 1=enabled - link mode chosen per-platform, 2=force link-standby mode, 3=force link-off mode) "
 136                  "Default: -1 (use per-chip default)");
 137
 138 module_param_named_unsafe(preliminary_hw_support, i915.preliminary_hw_support, int, 0400);
 139 MODULE_PARM_DESC(preliminary_hw_support,
 140         "Enable preliminary hardware support.");
 141
 142 module_param_named_unsafe(disable_power_well, i915.disable_power_well, int, 0400);
 143 MODULE_PARM_DESC(disable_power_well,
 144         "Disable display power wells when possible "
 145         "(-1=auto [default], 0=power wells always on, 1=power wells disabled when possible)");
 146
 147 module_param_named_unsafe(enable_ips, i915.enable_ips, int, 0600);
 148 MODULE_PARM_DESC(enable_ips, "Enable IPS (default: true)");
 149
 150 module_param_named(fastboot, i915.fastboot, bool, 0600);
 151 MODULE_PARM_DESC(fastboot,
 152         "Try to skip unnecessary mode sets at boot time (default: false)");
 153
 154 module_param_named_unsafe(prefault_disable, i915.prefault_disable, bool, 0600);
 155 MODULE_PARM_DESC(prefault_disable,
 156         "Disable page prefaulting for pread/pwrite/reloc (default:false). "
 157         "For developers only.");
 158
 159 module_param_named_unsafe(load_detect_test, i915.load_detect_test, bool, 0600);
 160 MODULE_PARM_DESC(load_detect_test,
 161         "Force-enable the VGA load detect code for testing (default:false). "
 162         "For developers only.");
 163
 164 module_param_named_unsafe(invert_brightness, i915.invert_brightness, int, 0600);
 165 MODULE_PARM_DESC(invert_brightness,
 166         "Invert backlight brightness "
 167         "(-1 force normal, 0 machine defaults, 1 force inversion), please "
 168         "report PCI device ID, subsystem vendor and subsystem device ID "
 169         "to dri-devel@lists.freedesktop.org, if your machine needs it. "
 170         "It will then be included in an upcoming module version.");
 171
 172 module_param_named(disable_display, i915.disable_display, bool, 0400);
 173 MODULE_PARM_DESC(disable_display, "Disable display (default: false)");
 174
 175 module_param_named_unsafe(enable_cmd_parser, i915.enable_cmd_parser, int, 0600);
 176 MODULE_PARM_DESC(enable_cmd_parser,
 177                  "Enable command parsing (1=enabled [default], 0=disabled)");
 178
 179 module_param_named_unsafe(use_mmio_flip, i915.use_mmio_flip, int, 0600);
 180 MODULE_PARM_DESC(use_mmio_flip,
 181                  "use MMIO flips (-1=never, 0=driver discretion [default], 1=always)");
 182
 183 module_param_named(mmio_debug, i915.mmio_debug, int, 0600);
 184 MODULE_PARM_DESC(mmio_debug,
 185         "Enable the MMIO debug code for the first N failures (default: off). "
 186         "This may negatively affect performance.");
 187
 188 module_param_named(verbose_state_checks, i915.verbose_state_checks, bool, 0600);
 189 MODULE_PARM_DESC(verbose_state_checks,
 190         "Enable verbose logs (ie. WARN_ON()) in case of unexpected hw state conditions.");
 191
 192 module_param_named_unsafe(nuclear_pageflip, i915.nuclear_pageflip, bool, 0600);
 193 MODULE_PARM_DESC(nuclear_pageflip,
 194                  "Force atomic modeset functionality; asynchronous mode is not yet supported. (default: false).");
 195
 196 /* WA to get away with the default setting in VBT for early platforms.Will be removed */
 197 module_param_named_unsafe(edp_vswing, i915.edp_vswing, int, 0400);
 198 MODULE_PARM_DESC(edp_vswing,
 199                  "Ignore/Override vswing pre-emph table selection from VBT "
 200                  "(0=use value from vbt [default], 1=low power swing(200mV),"
 201                  "2=default swing(400mV))");
 202
 203 module_param_named_unsafe(enable_guc_loading, i915.enable_guc_loading, int, 0400);
 204 MODULE_PARM_DESC(enable_guc_loading,
 205                 "Enable GuC firmware loading "
 206                 "(-1=auto, 0=never [default], 1=if available, 2=required)");
 207
 208 module_param_named_unsafe(enable_guc_submission, i915.enable_guc_submission, int, 0400);
 209 MODULE_PARM_DESC(enable_guc_submission,
 210                 "Enable GuC submission "
 211                 "(-1=auto, 0=never [default], 1=if available, 2=required)");
 212
 213 module_param_named(guc_log_level, i915.guc_log_level, int, 0400);
 214 MODULE_PARM_DESC(guc_log_level,
 215         "GuC firmware logging level (-1:disabled (default), 0-3:enabled)");
 216
 217 module_param_named_unsafe(enable_dp_mst, i915.enable_dp_mst, bool, 0600);
 218 MODULE_PARM_DESC(enable_dp_mst,
 219         "Enable multi-stream transport (MST) for new DisplayPort sinks. (default: true)");
 220 module_param_named_unsafe(inject_load_failure, i915.inject_load_failure, uint, 0400);
 221 MODULE_PARM_DESC(inject_load_failure,
 222         "Force an error after a number of failure check points (0:disabled (default), N:force failure at the Nth failure check point)");
 223 module_param_named(enable_dpcd_backlight, i915.enable_dpcd_backlight, bool, 0600);
 224 MODULE_PARM_DESC(enable_dpcd_backlight,
 225         "Enable support for DPCD backlight control (default:false)");
 226
 227 module_param_named(enable_gvt, i915.enable_gvt, bool, 0400);
 228 MODULE_PARM_DESC(enable_gvt,
 229         "Enable support for Intel GVT-g graphics virtualization host support(default:false)");