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 <drm/drm_print.h> 26 27 #include "i915_params.h" 28 #include "i915_drv.h" 29 30 #define i915_param_named(name, T, perm, desc) \ 31 module_param_named(name, i915_modparams.name, T, perm); \ 32 MODULE_PARM_DESC(name, desc) 33 #define i915_param_named_unsafe(name, T, perm, desc) \ 34 module_param_named_unsafe(name, i915_modparams.name, T, perm); \ 35 MODULE_PARM_DESC(name, desc) 36 37 struct i915_params i915_modparams __read_mostly = { 38 #define MEMBER(T, member, value) .member = (value), 39 I915_PARAMS_FOR_EACH(MEMBER) 40 #undef MEMBER 41 }; 42 43 i915_param_named(modeset, int, 0400, 44 "Use kernel modesetting [KMS] (0=disable, " 45 "1=on, -1=force vga console preference [default])"); 46 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 i915_param_named_unsafe(enable_dc, int, 0400, 52 "Enable power-saving display C-states. " 53 "(-1=auto [default]; 0=disable; 1=up to DC5; 2=up to DC6)"); 54 55 i915_param_named_unsafe(enable_fbc, int, 0600, 56 "Enable frame buffer compression for power savings " 57 "(default: -1 (use per-chip default))"); 58 59 i915_param_named_unsafe(lvds_channel_mode, int, 0400, 60 "Specify LVDS channel mode " 61 "(0=probe BIOS [default], 1=single-channel, 2=dual-channel)"); 62 63 i915_param_named_unsafe(panel_use_ssc, int, 0600, 64 "Use Spread Spectrum Clock with panels [LVDS/eDP] " 65 "(default: auto from VBT)"); 66 67 i915_param_named_unsafe(vbt_sdvo_panel_type, int, 0400, 68 "Override/Ignore selection of SDVO panel mode in the VBT " 69 "(-2=ignore, -1=auto [default], index in VBT BIOS table)"); 70 71 i915_param_named_unsafe(reset, int, 0600, 72 "Attempt GPU resets (0=disabled, 1=full gpu reset, 2=engine reset [default])"); 73 74 i915_param_named_unsafe(vbt_firmware, charp, 0400, 75 "Load VBT from specified file under /lib/firmware"); 76 77 #if IS_ENABLED(CONFIG_DRM_I915_CAPTURE_ERROR) 78 i915_param_named(error_capture, bool, 0600, 79 "Record the GPU state following a hang. " 80 "This information in /sys/class/drm/card<N>/error is vital for " 81 "triaging and debugging hangs."); 82 #endif 83 84 i915_param_named_unsafe(enable_hangcheck, bool, 0644, 85 "Periodically check GPU activity for detecting hangs. " 86 "WARNING: Disabling this can cause system wide hangs. " 87 "(default: true)"); 88 89 i915_param_named_unsafe(enable_ppgtt, int, 0400, 90 "Override PPGTT usage. " 91 "(-1=auto [default], 0=disabled, 1=aliasing, 2=full, 3=full with extended address space)"); 92 93 i915_param_named_unsafe(enable_psr, int, 0600, 94 "Enable PSR " 95 "(0=disabled, 1=enabled - link mode chosen per-platform, 2=force link-standby mode, 3=force link-off mode) " 96 "Default: -1 (use per-chip default)"); 97 98 i915_param_named_unsafe(alpha_support, bool, 0400, 99 "Enable alpha quality driver support for latest hardware. " 100 "See also CONFIG_DRM_I915_ALPHA_SUPPORT."); 101 102 i915_param_named_unsafe(disable_power_well, int, 0400, 103 "Disable display power wells when possible " 104 "(-1=auto [default], 0=power wells always on, 1=power wells disabled when possible)"); 105 106 i915_param_named_unsafe(enable_ips, int, 0600, "Enable IPS (default: true)"); 107 108 i915_param_named(fastboot, bool, 0600, 109 "Try to skip unnecessary mode sets at boot time (default: false)"); 110 111 i915_param_named_unsafe(prefault_disable, bool, 0600, 112 "Disable page prefaulting for pread/pwrite/reloc (default:false). " 113 "For developers only."); 114 115 i915_param_named_unsafe(load_detect_test, bool, 0600, 116 "Force-enable the VGA load detect code for testing (default:false). " 117 "For developers only."); 118 119 i915_param_named_unsafe(force_reset_modeset_test, bool, 0600, 120 "Force a modeset during gpu reset for testing (default:false). " 121 "For developers only."); 122 123 i915_param_named_unsafe(invert_brightness, int, 0600, 124 "Invert backlight brightness " 125 "(-1 force normal, 0 machine defaults, 1 force inversion), please " 126 "report PCI device ID, subsystem vendor and subsystem device ID " 127 "to dri-devel@lists.freedesktop.org, if your machine needs it. " 128 "It will then be included in an upcoming module version."); 129 130 i915_param_named(disable_display, bool, 0400, 131 "Disable display (default: false)"); 132 133 i915_param_named(mmio_debug, int, 0600, 134 "Enable the MMIO debug code for the first N failures (default: off). " 135 "This may negatively affect performance."); 136 137 i915_param_named(verbose_state_checks, bool, 0600, 138 "Enable verbose logs (ie. WARN_ON()) in case of unexpected hw state conditions."); 139 140 i915_param_named_unsafe(nuclear_pageflip, bool, 0400, 141 "Force enable atomic functionality on platforms that don't have full support yet."); 142 143 /* WA to get away with the default setting in VBT for early platforms.Will be removed */ 144 i915_param_named_unsafe(edp_vswing, int, 0400, 145 "Ignore/Override vswing pre-emph table selection from VBT " 146 "(0=use value from vbt [default], 1=low power swing(200mV)," 147 "2=default swing(400mV))"); 148 149 i915_param_named_unsafe(enable_guc, int, 0400, 150 "Enable GuC load for GuC submission and/or HuC load. " 151 "Required functionality can be selected using bitmask values. " 152 "(-1=auto, 0=disable [default], 1=GuC submission, 2=HuC load)"); 153 154 i915_param_named(guc_log_level, int, 0400, 155 "GuC firmware logging level. Requires GuC to be loaded. " 156 "(-1=auto [default], 0=disable, 1..4=enable with verbosity min..max)"); 157 158 i915_param_named_unsafe(guc_firmware_path, charp, 0400, 159 "GuC firmware path to use instead of the default one"); 160 161 i915_param_named_unsafe(huc_firmware_path, charp, 0400, 162 "HuC firmware path to use instead of the default one"); 163 164 i915_param_named_unsafe(dmc_firmware_path, charp, 0400, 165 "DMC firmware path to use instead of the default one"); 166 167 i915_param_named_unsafe(enable_dp_mst, bool, 0600, 168 "Enable multi-stream transport (MST) for new DisplayPort sinks. (default: true)"); 169 170 #if IS_ENABLED(CONFIG_DRM_I915_DEBUG) 171 i915_param_named_unsafe(inject_load_failure, uint, 0400, 172 "Force an error after a number of failure check points (0:disabled (default), N:force failure at the Nth failure check point)"); 173 #endif 174 175 i915_param_named(enable_dpcd_backlight, bool, 0600, 176 "Enable support for DPCD backlight control (default:false)"); 177 178 i915_param_named(enable_gvt, bool, 0400, 179 "Enable support for Intel GVT-g graphics virtualization host support(default:false)"); 180 181 static __always_inline void _print_param(struct drm_printer *p, 182 const char *name, 183 const char *type, 184 const void *x) 185 { 186 if (!__builtin_strcmp(type, "bool")) 187 drm_printf(p, "i915.%s=%s\n", name, yesno(*(const bool *)x)); 188 else if (!__builtin_strcmp(type, "int")) 189 drm_printf(p, "i915.%s=%d\n", name, *(const int *)x); 190 else if (!__builtin_strcmp(type, "unsigned int")) 191 drm_printf(p, "i915.%s=%u\n", name, *(const unsigned int *)x); 192 else if (!__builtin_strcmp(type, "char *")) 193 drm_printf(p, "i915.%s=%s\n", name, *(const char **)x); 194 else 195 BUILD_BUG(); 196 } 197 198 /** 199 * i915_params_dump - dump i915 modparams 200 * @params: i915 modparams 201 * @p: the &drm_printer 202 * 203 * Pretty printer for i915 modparams. 204 */ 205 void i915_params_dump(const struct i915_params *params, struct drm_printer *p) 206 { 207 #define PRINT(T, x, ...) _print_param(p, #x, #T, ¶ms->x); 208 I915_PARAMS_FOR_EACH(PRINT); 209 #undef PRINT 210 } 211