sys/dev/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 #define i915_param_named(name, T, perm, desc) \
  29         module_param_named(name, i915_modparams.name, T, perm); \
  30         MODULE_PARM_DESC(name, desc)
  31 #define i915_param_named_unsafe(name, T, perm, desc) \
  32         module_param_named_unsafe(name, i915_modparams.name, T, perm); \
  33         MODULE_PARM_DESC(name, desc)
  34
  35 struct i915_params i915_modparams __read_mostly = {
  36 #define MEMBER(T, member, value) .member = (value),
  37         I915_PARAMS_FOR_EACH(MEMBER)
  38 #undef MEMBER
  39 };
  40
  41 TUNABLE_INT("drm.i915.modeset", &i915_modparams.modeset);
  42 i915_param_named(modeset, int, 0400,
  43         "Use kernel modesetting [KMS] (0=disable, "
  44         "1=on, -1=force vga console preference [default])");
  45
  46 TUNABLE_INT("drm.i915.panel_ignore_lid", &i915_modparams.panel_ignore_lid);
  47 i915_param_named_unsafe(panel_ignore_lid, int, 0600,
  48         "Override lid status (0=autodetect, 1=autodetect disabled [default], "
  49         "-1=force lid closed, -2=force lid open)");
  50
  51 TUNABLE_INT("drm.i915.semaphores", &i915_modparams.semaphores);
  52 i915_param_named_unsafe(semaphores, int, 0400,
  53         "Use semaphores for inter-ring sync "
  54         "(default: -1 (use per-chip defaults))");
  55
  56 TUNABLE_INT("drm.i915.enable_rc6", &i915_modparams.enable_rc6);
  57 i915_param_named_unsafe(enable_rc6, int, 0400,
  58         "Enable power-saving render C-state 6. "
  59         "Different stages can be selected via bitmask values "
  60         "(0 = disable; 1 = enable rc6; 2 = enable deep rc6; 4 = enable deepest rc6). "
  61         "For example, 3 would enable rc6 and deep rc6, and 7 would enable everything. "
  62         "default: -1 (use per-chip default)");
  63
  64 TUNABLE_INT("drm.i915.enable_dc", &i915_modparams.enable_dc);
  65 i915_param_named_unsafe(enable_dc, int, 0400,
  66         "Enable power-saving display C-states. "
  67         "(-1=auto [default]; 0=disable; 1=up to DC5; 2=up to DC6)");
  68
  69 TUNABLE_INT("drm.i915.enable_fbc", &i915_modparams.enable_fbc);
  70 i915_param_named_unsafe(enable_fbc, int, 0600,
  71         "Enable frame buffer compression for power savings "
  72         "(default: -1 (use per-chip default))");
  73
  74 TUNABLE_INT("drm.i915.lvds_channel_mode", &i915_modparams.lvds_channel_mode);
  75 i915_param_named_unsafe(lvds_channel_mode, int, 0400,
  76          "Specify LVDS channel mode "
  77          "(0=probe BIOS [default], 1=single-channel, 2=dual-channel)");
  78
  79 TUNABLE_INT("drm.i915.panel_use_ssc", &i915_modparams.panel_use_ssc);
  80 i915_param_named_unsafe(panel_use_ssc, int, 0600,
  81         "Use Spread Spectrum Clock with panels [LVDS/eDP] "
  82         "(default: auto from VBT)");
  83
  84 TUNABLE_INT("drm.i915.vbt_sdvo_panel_type", &i915_modparams.vbt_sdvo_panel_type);
  85 i915_param_named_unsafe(vbt_sdvo_panel_type, int, 0400,
  86         "Override/Ignore selection of SDVO panel mode in the VBT "
  87         "(-2=ignore, -1=auto [default], index in VBT BIOS table)");
  88
  89 i915_param_named_unsafe(reset, int, 0600,
  90         "Attempt GPU resets (0=disabled, 1=full gpu reset, 2=engine reset [default])");
  91
  92 i915_param_named_unsafe(vbt_firmware, charp, 0400,
  93         "Load VBT from specified file under /lib/firmware");
  94
  95 #if IS_ENABLED(CONFIG_DRM_I915_CAPTURE_ERROR)
  96 i915_param_named(error_capture, bool, 0600,
  97         "Record the GPU state following a hang. "
  98         "This information in /sys/class/drm/card<N>/error is vital for "
  99         "triaging and debugging hangs.");
 100 #endif
 101
 102 i915_param_named_unsafe(enable_hangcheck, bool, 0644,
 103         "Periodically check GPU activity for detecting hangs. "
 104         "WARNING: Disabling this can cause system wide hangs. "
 105         "(default: true)");
 106
 107 TUNABLE_INT("drm.i915.enable_ppgtt", &i915_modparams.enable_ppgtt);
 108 i915_param_named_unsafe(enable_ppgtt, int, 0400,
 109         "Override PPGTT usage. "
 110         "(-1=auto [default], 0=disabled, 1=aliasing, 2=full, 3=full with extended address space)");
 111
 112 TUNABLE_INT("drm.i915.enable_execlists", &i915_modparams.enable_execlists);
 113 i915_param_named_unsafe(enable_execlists, int, 0400,
 114         "Override execlists usage. "
 115         "(-1=auto [default], 0=disabled, 1=enabled)");
 116
 117 TUNABLE_INT("drm.i915.enable_psr", &i915_modparams.enable_psr);
 118 i915_param_named_unsafe(enable_psr, int, 0600,
 119         "Enable PSR "
 120         "(0=disabled, 1=enabled - link mode chosen per-platform, 2=force link-standby mode, 3=force link-off mode) "
 121         "Default: -1 (use per-chip default)");
 122
 123 i915_param_named_unsafe(alpha_support, bool, 0400,
 124         "Enable alpha quality driver support for latest hardware. "
 125         "See also CONFIG_DRM_I915_ALPHA_SUPPORT.");
 126
 127 i915_param_named_unsafe(disable_power_well, int, 0400,
 128         "Disable display power wells when possible "
 129         "(-1=auto [default], 0=power wells always on, 1=power wells disabled when possible)");
 130
 131 i915_param_named_unsafe(enable_ips, int, 0600, "Enable IPS (default: true)");
 132
 133 i915_param_named(fastboot, bool, 0600,
 134         "Try to skip unnecessary mode sets at boot time (default: false)");
 135
 136 i915_param_named_unsafe(prefault_disable, bool, 0600,
 137         "Disable page prefaulting for pread/pwrite/reloc (default:false). "
 138         "For developers only.");
 139
 140 i915_param_named_unsafe(load_detect_test, bool, 0600,
 141         "Force-enable the VGA load detect code for testing (default:false). "
 142         "For developers only.");
 143
 144 i915_param_named_unsafe(force_reset_modeset_test, bool, 0600,
 145         "Force a modeset during gpu reset for testing (default:false). "
 146         "For developers only.");
 147
 148 TUNABLE_INT("drm.i915.panel_invert_brightness", &i915_modparams.invert_brightness);
 149 i915_param_named_unsafe(invert_brightness, int, 0600,
 150         "Invert backlight brightness "
 151         "(-1 force normal, 0 machine defaults, 1 force inversion), please "
 152         "report PCI device ID, subsystem vendor and subsystem device ID "
 153         "to dri-devel@lists.freedesktop.org, if your machine needs it. "
 154         "It will then be included in an upcoming module version.");
 155
 156 i915_param_named(disable_display, bool, 0400,
 157         "Disable display (default: false)");
 158
 159 i915_param_named_unsafe(enable_cmd_parser, bool, 0400,
 160         "Enable command parsing (true=enabled [default], false=disabled)");
 161
 162 i915_param_named(mmio_debug, int, 0600,
 163         "Enable the MMIO debug code for the first N failures (default: off). "
 164         "This may negatively affect performance.");
 165
 166 i915_param_named(verbose_state_checks, bool, 0600,
 167         "Enable verbose logs (ie. WARN_ON()) in case of unexpected hw state conditions.");
 168
 169 i915_param_named_unsafe(nuclear_pageflip, bool, 0400,
 170         "Force enable atomic functionality on platforms that don't have full support yet.");
 171
 172 /* WA to get away with the default setting in VBT for early platforms.Will be removed */
 173 i915_param_named_unsafe(edp_vswing, int, 0400,
 174         "Ignore/Override vswing pre-emph table selection from VBT "
 175         "(0=use value from vbt [default], 1=low power swing(200mV),"
 176         "2=default swing(400mV))");
 177
 178 i915_param_named_unsafe(enable_guc_loading, int, 0400,
 179         "Enable GuC firmware loading "
 180         "(-1=auto, 0=never [default], 1=if available, 2=required)");
 181
 182 i915_param_named_unsafe(enable_guc_submission, int, 0400,
 183         "Enable GuC submission "
 184         "(-1=auto, 0=never [default], 1=if available, 2=required)");
 185
 186 i915_param_named(guc_log_level, int, 0400,
 187         "GuC firmware logging level (-1:disabled (default), 0-3:enabled)");
 188
 189 i915_param_named_unsafe(guc_firmware_path, charp, 0400,
 190         "GuC firmware path to use instead of the default one");
 191
 192 i915_param_named_unsafe(huc_firmware_path, charp, 0400,
 193         "HuC firmware path to use instead of the default one");
 194
 195 i915_param_named_unsafe(enable_dp_mst, bool, 0600,
 196         "Enable multi-stream transport (MST) for new DisplayPort sinks. (default: true)");
 197
 198 i915_param_named_unsafe(inject_load_failure, uint, 0400,
 199         "Force an error after a number of failure check points (0:disabled (default), N:force failure at the Nth failure check point)");
 200
 201 i915_param_named(enable_dpcd_backlight, bool, 0600,
 202         "Enable support for DPCD backlight control (default:false)");
 203
 204 i915_param_named(enable_gvt, bool, 0400,
 205         "Enable support for Intel GVT-g graphics virtualization host support(default:false)");