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         .alpha_support = IS_ENABLED(CONFIG_DRM_I915_ALPHA_SUPPORT),
  43         .disable_power_well = -1,
  44         .enable_ips = 1,
  45         .fastboot = 0,
  46         .prefault_disable = 0,
  47         .load_detect_test = 0,
  48         .force_reset_modeset_test = 0,
  49         .reset = true,
  50         .error_capture = true,
  51         .invert_brightness = 0,
  52         .disable_display = 0,
  53         .enable_cmd_parser = true,
  54         .use_mmio_flip = 0,
  55         .mmio_debug = 0,
  56         .verbose_state_checks = 1,
  57         .nuclear_pageflip = 0,
  58         .edp_vswing = 0,
  59         .enable_guc_loading = 0,
  60         .enable_guc_submission = 0,
  61         .guc_log_level = -1,
  62         .enable_dp_mst = true,
  63         .inject_load_failure = 0,
  64         .enable_dpcd_backlight = false,
  65         .enable_gvt = false,
  66 };
  67
  68 module_param_named(modeset, i915.modeset, int, 0400);
  69 MODULE_PARM_DESC(modeset,
  70         "Use kernel modesetting [KMS] (0=disable, "
  71         "1=on, -1=force vga console preference [default])");
  72
  73 module_param_named_unsafe(panel_ignore_lid, i915.panel_ignore_lid, int, 0600);
  74 MODULE_PARM_DESC(panel_ignore_lid,
  75         "Override lid status (0=autodetect, 1=autodetect disabled [default], "
  76         "-1=force lid closed, -2=force lid open)");
  77
  78 module_param_named_unsafe(semaphores, i915.semaphores, int, 0400);
  79 MODULE_PARM_DESC(semaphores,
  80         "Use semaphores for inter-ring sync "
  81         "(default: -1 (use per-chip defaults))");
  82
  83 module_param_named_unsafe(enable_rc6, i915.enable_rc6, int, 0400);
  84 MODULE_PARM_DESC(enable_rc6,
  85         "Enable power-saving render C-state 6. "
  86         "Different stages can be selected via bitmask values "
  87         "(0 = disable; 1 = enable rc6; 2 = enable deep rc6; 4 = enable deepest rc6). "
  88         "For example, 3 would enable rc6 and deep rc6, and 7 would enable everything. "
  89         "default: -1 (use per-chip default)");
  90
  91 module_param_named_unsafe(enable_dc, i915.enable_dc, int, 0400);
  92 MODULE_PARM_DESC(enable_dc,
  93         "Enable power-saving display C-states. "
  94         "(-1=auto [default]; 0=disable; 1=up to DC5; 2=up to DC6)");
  95
  96 module_param_named_unsafe(enable_fbc, i915.enable_fbc, int, 0600);
  97 MODULE_PARM_DESC(enable_fbc,
  98         "Enable frame buffer compression for power savings "
  99         "(default: -1 (use per-chip default))");
 100
 101 module_param_named_unsafe(lvds_channel_mode, i915.lvds_channel_mode, int, 0400);
 102 MODULE_PARM_DESC(lvds_channel_mode,
 103          "Specify LVDS channel mode "
 104          "(0=probe BIOS [default], 1=single-channel, 2=dual-channel)");
 105
 106 module_param_named_unsafe(lvds_use_ssc, i915.panel_use_ssc, int, 0600);
 107 MODULE_PARM_DESC(lvds_use_ssc,
 108         "Use Spread Spectrum Clock with panels [LVDS/eDP] "
 109         "(default: auto from VBT)");
 110
 111 module_param_named_unsafe(vbt_sdvo_panel_type, i915.vbt_sdvo_panel_type, int, 0400);
 112 MODULE_PARM_DESC(vbt_sdvo_panel_type,
 113         "Override/Ignore selection of SDVO panel mode in the VBT "
 114         "(-2=ignore, -1=auto [default], index in VBT BIOS table)");
 115
 116 module_param_named_unsafe(reset, i915.reset, bool, 0600);
 117 MODULE_PARM_DESC(reset, "Attempt GPU resets (default: true)");
 118
 119 #if IS_ENABLED(CONFIG_DRM_I915_CAPTURE_ERROR)
 120 module_param_named(error_capture, i915.error_capture, bool, 0600);
 121 MODULE_PARM_DESC(error_capture,
 122         "Record the GPU state following a hang. "
 123         "This information in /sys/class/drm/card<N>/error is vital for "
 124         "triaging and debugging hangs.");
 125 #endif
 126
 127 module_param_named_unsafe(enable_hangcheck, i915.enable_hangcheck, bool, 0644);
 128 MODULE_PARM_DESC(enable_hangcheck,
 129         "Periodically check GPU activity for detecting hangs. "
 130         "WARNING: Disabling this can cause system wide hangs. "
 131         "(default: true)");
 132
 133 module_param_named_unsafe(enable_ppgtt, i915.enable_ppgtt, int, 0400);
 134 MODULE_PARM_DESC(enable_ppgtt,
 135         "Override PPGTT usage. "
 136         "(-1=auto [default], 0=disabled, 1=aliasing, 2=full, 3=full with extended address space)");
 137
 138 module_param_named_unsafe(enable_execlists, i915.enable_execlists, int, 0400);
 139 MODULE_PARM_DESC(enable_execlists,
 140         "Override execlists usage. "
 141         "(-1=auto [default], 0=disabled, 1=enabled)");
 142
 143 module_param_named_unsafe(enable_psr, i915.enable_psr, int, 0600);
 144 MODULE_PARM_DESC(enable_psr, "Enable PSR "
 145                  "(0=disabled, 1=enabled - link mode chosen per-platform, 2=force link-standby mode, 3=force link-off mode) "
 146                  "Default: -1 (use per-chip default)");
 147
 148 module_param_named_unsafe(alpha_support, i915.alpha_support, int, 0400);
 149 MODULE_PARM_DESC(alpha_support,
 150         "Enable alpha quality driver support for latest hardware. "
 151         "See also CONFIG_DRM_I915_ALPHA_SUPPORT.");
 152
 153 module_param_named_unsafe(disable_power_well, i915.disable_power_well, int, 0400);
 154 MODULE_PARM_DESC(disable_power_well,
 155         "Disable display power wells when possible "
 156         "(-1=auto [default], 0=power wells always on, 1=power wells disabled when possible)");
 157
 158 module_param_named_unsafe(enable_ips, i915.enable_ips, int, 0600);
 159 MODULE_PARM_DESC(enable_ips, "Enable IPS (default: true)");
 160
 161 module_param_named(fastboot, i915.fastboot, bool, 0600);
 162 MODULE_PARM_DESC(fastboot,
 163         "Try to skip unnecessary mode sets at boot time (default: false)");
 164
 165 module_param_named_unsafe(prefault_disable, i915.prefault_disable, bool, 0600);
 166 MODULE_PARM_DESC(prefault_disable,
 167         "Disable page prefaulting for pread/pwrite/reloc (default:false). "
 168         "For developers only.");
 169
 170 module_param_named_unsafe(load_detect_test, i915.load_detect_test, bool, 0600);
 171 MODULE_PARM_DESC(load_detect_test,
 172         "Force-enable the VGA load detect code for testing (default:false). "
 173         "For developers only.");
 174
 175 module_param_named_unsafe(force_reset_modeset_test, i915.force_reset_modeset_test, bool, 0600);
 176 MODULE_PARM_DESC(force_reset_modeset_test,
 177         "Force a modeset during gpu reset for testing (default:false). "
 178         "For developers only.");
 179
 180 module_param_named_unsafe(invert_brightness, i915.invert_brightness, int, 0600);
 181 MODULE_PARM_DESC(invert_brightness,
 182         "Invert backlight brightness "
 183         "(-1 force normal, 0 machine defaults, 1 force inversion), please "
 184         "report PCI device ID, subsystem vendor and subsystem device ID "
 185         "to dri-devel@lists.freedesktop.org, if your machine needs it. "
 186         "It will then be included in an upcoming module version.");
 187
 188 module_param_named(disable_display, i915.disable_display, bool, 0400);
 189 MODULE_PARM_DESC(disable_display, "Disable display (default: false)");
 190
 191 module_param_named_unsafe(enable_cmd_parser, i915.enable_cmd_parser, bool, 0400);
 192 MODULE_PARM_DESC(enable_cmd_parser,
 193                  "Enable command parsing (true=enabled [default], false=disabled)");
 194
 195 module_param_named_unsafe(use_mmio_flip, i915.use_mmio_flip, int, 0600);
 196 MODULE_PARM_DESC(use_mmio_flip,
 197                  "use MMIO flips (-1=never, 0=driver discretion [default], 1=always)");
 198
 199 module_param_named(mmio_debug, i915.mmio_debug, int, 0600);
 200 MODULE_PARM_DESC(mmio_debug,
 201         "Enable the MMIO debug code for the first N failures (default: off). "
 202         "This may negatively affect performance.");
 203
 204 module_param_named(verbose_state_checks, i915.verbose_state_checks, bool, 0600);
 205 MODULE_PARM_DESC(verbose_state_checks,
 206         "Enable verbose logs (ie. WARN_ON()) in case of unexpected hw state conditions.");
 207
 208 module_param_named_unsafe(nuclear_pageflip, i915.nuclear_pageflip, bool, 0600);
 209 MODULE_PARM_DESC(nuclear_pageflip,
 210                  "Force atomic modeset functionality; asynchronous mode is not yet supported. (default: false).");
 211
 212 /* WA to get away with the default setting in VBT for early platforms.Will be removed */
 213 module_param_named_unsafe(edp_vswing, i915.edp_vswing, int, 0400);
 214 MODULE_PARM_DESC(edp_vswing,
 215                  "Ignore/Override vswing pre-emph table selection from VBT "
 216                  "(0=use value from vbt [default], 1=low power swing(200mV),"
 217                  "2=default swing(400mV))");
 218
 219 module_param_named_unsafe(enable_guc_loading, i915.enable_guc_loading, int, 0400);
 220 MODULE_PARM_DESC(enable_guc_loading,
 221                 "Enable GuC firmware loading "
 222                 "(-1=auto, 0=never [default], 1=if available, 2=required)");
 223
 224 module_param_named_unsafe(enable_guc_submission, i915.enable_guc_submission, int, 0400);
 225 MODULE_PARM_DESC(enable_guc_submission,
 226                 "Enable GuC submission "
 227                 "(-1=auto, 0=never [default], 1=if available, 2=required)");
 228
 229 module_param_named(guc_log_level, i915.guc_log_level, int, 0400);
 230 MODULE_PARM_DESC(guc_log_level,
 231         "GuC firmware logging level (-1:disabled (default), 0-3:enabled)");
 232
 233 module_param_named_unsafe(enable_dp_mst, i915.enable_dp_mst, bool, 0600);
 234 MODULE_PARM_DESC(enable_dp_mst,
 235         "Enable multi-stream transport (MST) for new DisplayPort sinks. (default: true)");
 236 module_param_named_unsafe(inject_load_failure, i915.inject_load_failure, uint, 0400);
 237 MODULE_PARM_DESC(inject_load_failure,
 238         "Force an error after a number of failure check points (0:disabled (default), N:force failure at the Nth failure check point)");
 239 module_param_named(enable_dpcd_backlight, i915.enable_dpcd_backlight, bool, 0600);
 240 MODULE_PARM_DESC(enable_dpcd_backlight,
 241         "Enable support for DPCD backlight control (default:false)");
 242
 243 module_param_named(enable_gvt, i915.enable_gvt, bool, 0400);
 244 MODULE_PARM_DESC(enable_gvt,
 245         "Enable support for Intel GVT-g graphics virtualization host support(default:false)");