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(enable_dc, int, 0400, 48 "Enable power-saving display C-states. " 49 "(-1=auto [default]; 0=disable; 1=up to DC5; 2=up to DC6; " 50 "3=up to DC5 with DC3CO; 4=up to DC6 with DC3CO)"); 51 52 i915_param_named_unsafe(enable_fbc, int, 0600, 53 "Enable frame buffer compression for power savings " 54 "(default: -1 (use per-chip default))"); 55 56 i915_param_named_unsafe(lvds_channel_mode, int, 0400, 57 "Specify LVDS channel mode " 58 "(0=probe BIOS [default], 1=single-channel, 2=dual-channel)"); 59 60 i915_param_named_unsafe(panel_use_ssc, int, 0600, 61 "Use Spread Spectrum Clock with panels [LVDS/eDP] " 62 "(default: auto from VBT)"); 63 64 i915_param_named_unsafe(vbt_sdvo_panel_type, int, 0400, 65 "Override/Ignore selection of SDVO panel mode in the VBT " 66 "(-2=ignore, -1=auto [default], index in VBT BIOS table)"); 67 68 i915_param_named_unsafe(reset, uint, 0600, 69 "Attempt GPU resets (0=disabled, 1=full gpu reset, 2=engine reset [default])"); 70 71 i915_param_named_unsafe(vbt_firmware, charp, 0400, 72 "Load VBT from specified file under /lib/firmware"); 73 74 #if IS_ENABLED(CONFIG_DRM_I915_CAPTURE_ERROR) 75 i915_param_named(error_capture, bool, 0600, 76 "Record the GPU state following a hang. " 77 "This information in /sys/class/drm/card<N>/error is vital for " 78 "triaging and debugging hangs."); 79 #endif 80 81 i915_param_named_unsafe(enable_hangcheck, bool, 0600, 82 "Periodically check GPU activity for detecting hangs. " 83 "WARNING: Disabling this can cause system wide hangs. " 84 "(default: true)"); 85 86 i915_param_named_unsafe(enable_psr, int, 0600, 87 "Enable PSR " 88 "(0=disabled, 1=enabled) " 89 "Default: -1 (use per-chip default)"); 90 91 i915_param_named_unsafe(force_probe, charp, 0400, 92 "Force probe the driver for specified devices. " 93 "See CONFIG_DRM_I915_FORCE_PROBE for details."); 94 95 i915_param_named_unsafe(disable_power_well, int, 0400, 96 "Disable display power wells when possible " 97 "(-1=auto [default], 0=power wells always on, 1=power wells disabled when possible)"); 98 99 i915_param_named_unsafe(enable_ips, int, 0600, "Enable IPS (default: true)"); 100 101 i915_param_named(fastboot, int, 0600, 102 "Try to skip unnecessary mode sets at boot time " 103 "(0=disabled, 1=enabled) " 104 "Default: -1 (use per-chip default)"); 105 106 i915_param_named_unsafe(load_detect_test, bool, 0600, 107 "Force-enable the VGA load detect code for testing (default:false). " 108 "For developers only."); 109 110 i915_param_named_unsafe(force_reset_modeset_test, bool, 0600, 111 "Force a modeset during gpu reset for testing (default:false). " 112 "For developers only."); 113 114 i915_param_named_unsafe(invert_brightness, int, 0600, 115 "Invert backlight brightness " 116 "(-1 force normal, 0 machine defaults, 1 force inversion), please " 117 "report PCI device ID, subsystem vendor and subsystem device ID " 118 "to dri-devel@lists.freedesktop.org, if your machine needs it. " 119 "It will then be included in an upcoming module version."); 120 121 i915_param_named(disable_display, bool, 0400, 122 "Disable display (default: false)"); 123 124 i915_param_named(mmio_debug, int, 0600, 125 "Enable the MMIO debug code for the first N failures (default: off). " 126 "This may negatively affect performance."); 127 128 i915_param_named(verbose_state_checks, bool, 0600, 129 "Enable verbose logs (ie. WARN_ON()) in case of unexpected hw state conditions."); 130 131 i915_param_named_unsafe(nuclear_pageflip, bool, 0400, 132 "Force enable atomic functionality on platforms that don't have full support yet."); 133 134 /* WA to get away with the default setting in VBT for early platforms.Will be removed */ 135 i915_param_named_unsafe(edp_vswing, int, 0400, 136 "Ignore/Override vswing pre-emph table selection from VBT " 137 "(0=use value from vbt [default], 1=low power swing(200mV)," 138 "2=default swing(400mV))"); 139 140 i915_param_named_unsafe(enable_guc, int, 0400, 141 "Enable GuC load for GuC submission and/or HuC load. " 142 "Required functionality can be selected using bitmask values. " 143 "(-1=auto, 0=disable [default], 1=GuC submission, 2=HuC load)"); 144 145 i915_param_named(guc_log_level, int, 0400, 146 "GuC firmware logging level. Requires GuC to be loaded. " 147 "(-1=auto [default], 0=disable, 1..4=enable with verbosity min..max)"); 148 149 i915_param_named_unsafe(guc_firmware_path, charp, 0400, 150 "GuC firmware path to use instead of the default one"); 151 152 i915_param_named_unsafe(huc_firmware_path, charp, 0400, 153 "HuC firmware path to use instead of the default one"); 154 155 i915_param_named_unsafe(dmc_firmware_path, charp, 0400, 156 "DMC firmware path to use instead of the default one"); 157 158 i915_param_named_unsafe(enable_dp_mst, bool, 0600, 159 "Enable multi-stream transport (MST) for new DisplayPort sinks. (default: true)"); 160 161 #if IS_ENABLED(CONFIG_DRM_I915_DEBUG) 162 i915_param_named_unsafe(inject_probe_failure, uint, 0400, 163 "Force an error after a number of failure check points (0:disabled (default), N:force failure at the Nth failure check point)"); 164 #endif 165 166 i915_param_named(enable_dpcd_backlight, int, 0600, 167 "Enable support for DPCD backlight control" 168 "(-1=use per-VBT LFP backlight type setting [default], 0=disabled, 1=enabled)"); 169 170 #if IS_ENABLED(CONFIG_DRM_I915_GVT) 171 i915_param_named(enable_gvt, bool, 0400, 172 "Enable support for Intel GVT-g graphics virtualization host support(default:false)"); 173 #endif 174 175 #if IS_ENABLED(CONFIG_DRM_I915_UNSTABLE_FAKE_LMEM) 176 i915_param_named_unsafe(fake_lmem_start, ulong, 0400, 177 "Fake LMEM start offset (default: 0)"); 178 #endif 179 180 static __always_inline void _print_param(struct drm_printer *p, 181 const char *name, 182 const char *type, 183 const void *x) 184 { 185 if (!__builtin_strcmp(type, "bool")) 186 drm_printf(p, "i915.%s=%s\n", name, yesno(*(const bool *)x)); 187 else if (!__builtin_strcmp(type, "int")) 188 drm_printf(p, "i915.%s=%d\n", name, *(const int *)x); 189 else if (!__builtin_strcmp(type, "unsigned int")) 190 drm_printf(p, "i915.%s=%u\n", name, *(const unsigned int *)x); 191 else if (!__builtin_strcmp(type, "unsigned long")) 192 drm_printf(p, "i915.%s=%lu\n", name, *(const unsigned long *)x); 193 else if (!__builtin_strcmp(type, "char *")) 194 drm_printf(p, "i915.%s=%s\n", name, *(const char **)x); 195 else 196 WARN_ONCE(1, "no printer defined for param type %s (i915.%s)\n", 197 type, name); 198 } 199 200 /** 201 * i915_params_dump - dump i915 modparams 202 * @params: i915 modparams 203 * @p: the &drm_printer 204 * 205 * Pretty printer for i915 modparams. 206 */ 207 void i915_params_dump(const struct i915_params *params, struct drm_printer *p) 208 { 209 #define PRINT(T, x, ...) _print_param(p, #x, #T, ¶ms->x); 210 I915_PARAMS_FOR_EACH(PRINT); 211 #undef PRINT 212 } 213 214 static __always_inline void dup_param(const char *type, void *x) 215 { 216 if (!__builtin_strcmp(type, "char *")) 217 *(void **)x = kstrdup(*(void **)x, GFP_ATOMIC); 218 } 219 220 void i915_params_copy(struct i915_params *dest, const struct i915_params *src) 221 { 222 *dest = *src; 223 #define DUP(T, x, ...) dup_param(#T, &dest->x); 224 I915_PARAMS_FOR_EACH(DUP); 225 #undef DUP 226 } 227 228 static __always_inline void free_param(const char *type, void *x) 229 { 230 if (!__builtin_strcmp(type, "char *")) { 231 kfree(*(void **)x); 232 *(void **)x = NULL; 233 } 234 } 235 236 /* free the allocated members, *not* the passed in params itself */ 237 void i915_params_free(struct i915_params *params) 238 { 239 #define FREE(T, x, ...) free_param(#T, ¶ms->x); 240 I915_PARAMS_FOR_EACH(FREE); 241 #undef FREE 242 } 243