1# SPDX-License-Identifier: GPL-2.0-only 2config DRM_I915_WERROR 3 bool "Force GCC to throw an error instead of a warning when compiling" 4 # As this may inadvertently break the build, only allow the user 5 # to shoot oneself in the foot iff they aim really hard 6 depends on EXPERT 7 # We use the dependency on !COMPILE_TEST to not be enabled in 8 # allmodconfig or allyesconfig configurations 9 depends on !COMPILE_TEST 10 default n 11 help 12 Add -Werror to the build flags for (and only for) i915.ko. 13 Do not enable this unless you are writing code for the i915.ko module. 14 15 Recommended for driver developers only. 16 17 If in doubt, say "N". 18 19config DRM_I915_DEBUG 20 bool "Enable additional driver debugging" 21 depends on DRM_I915 22 depends on EXPERT # only for developers 23 depends on !COMPILE_TEST # never built by robots 24 select DEBUG_FS 25 select PREEMPT_COUNT 26 select I2C_CHARDEV 27 select REF_TRACKER 28 select STACKDEPOT 29 select STACKTRACE 30 select DRM_DP_AUX_CHARDEV 31 select DRM_DISPLAY_DEBUG_DP_TUNNEL_STATE if DRM_I915_DP_TUNNEL 32 select X86_MSR # used by igt/pm_rpm 33 select DRM_VGEM # used by igt/prime_vgem (dmabuf interop checks) 34 select DRM_DEBUG_MM if DRM=y 35 select DRM_EXPORT_FOR_TESTS if m 36 select DRM_DEBUG_SELFTEST 37 select DMABUF_SELFTESTS 38 select SW_SYNC # signaling validation framework (igt/syncobj*) 39 select DRM_I915_WERROR 40 select DRM_I915_DEBUG_GEM 41 select DRM_I915_DEBUG_GEM_ONCE 42 select DRM_I915_DEBUG_MMIO 43 select DRM_I915_DEBUG_RUNTIME_PM 44 select DRM_I915_DEBUG_WAKEREF 45 select DRM_I915_SW_FENCE_DEBUG_OBJECTS 46 select DRM_I915_SELFTEST 47 default n 48 help 49 Choose this option to turn on extra driver debugging that may affect 50 performance but will catch some internal issues. 51 52 Recommended for driver developers only. 53 54 If in doubt, say "N". 55 56config DRM_I915_DEBUG_MMIO 57 bool "Always insert extra checks around mmio access by default" 58 default n 59 help 60 By default, always enables the extra sanity checks (extra register 61 reads) around every mmio (register) access that will slow the system 62 down. This sets the default value of i915.mmio_debug to -1 and can 63 be overridden at module load. 64 65 Recommended for driver developers only. 66 67 If in doubt, say "N". 68 69config DRM_I915_DEBUG_GEM 70 bool "Insert extra checks into the GEM internals" 71 default n 72 depends on DRM_I915_WERROR 73 help 74 Enable extra sanity checks (including BUGs) along the GEM driver 75 paths that may slow the system down and if hit hang the machine. 76 77 Recommended for driver developers only. 78 79 If in doubt, say "N". 80 81config DRM_I915_DEBUG_GEM_ONCE 82 bool "Make a GEM debug failure fatal" 83 default n 84 depends on DRM_I915_DEBUG_GEM 85 help 86 During development, we often only want the very first failure 87 as that would otherwise be lost in the deluge of subsequent 88 failures. However, more casual testers may not want to trigger 89 a hard BUG_ON and hope that the system remains sufficiently usable 90 to capture a bug report in situ. 91 92 Recommended for driver developers only. 93 94 If in doubt, say "N". 95 96config DRM_I915_ERRLOG_GEM 97 bool "Insert extra logging (very verbose) for common GEM errors" 98 default n 99 depends on DRM_I915_DEBUG_GEM 100 help 101 Enable additional logging that may help track down the cause of 102 principally userspace errors. 103 104 Recommended for driver developers only. 105 106 If in doubt, say "N". 107 108config DRM_I915_TRACE_GEM 109 bool "Insert extra ftrace output from the GEM internals" 110 depends on DRM_I915_DEBUG_GEM 111 select TRACING 112 default n 113 help 114 Enable additional and verbose debugging output that will spam 115 ordinary tests, but may be vital for post-mortem debugging when 116 used with /proc/sys/kernel/ftrace_dump_on_oops 117 118 Recommended for driver developers only. 119 120 If in doubt, say "N". 121 122config DRM_I915_TRACE_GTT 123 bool "Insert extra ftrace output from the GTT internals" 124 depends on DRM_I915_DEBUG_GEM 125 select TRACING 126 default n 127 help 128 Enable additional and verbose debugging output that will spam 129 ordinary tests, but may be vital for post-mortem debugging when 130 used with /proc/sys/kernel/ftrace_dump_on_oops 131 132 Recommended for driver developers only. 133 134 If in doubt, say "N". 135 136config DRM_I915_SW_FENCE_DEBUG_OBJECTS 137 bool "Enable additional driver debugging for fence objects" 138 depends on DRM_I915 139 select DEBUG_OBJECTS 140 default n 141 help 142 Choose this option to turn on extra driver debugging that may affect 143 performance but will catch some internal issues. 144 145 Recommended for driver developers only. 146 147 If in doubt, say "N". 148 149config DRM_I915_SW_FENCE_CHECK_DAG 150 bool "Enable additional driver debugging for detecting dependency cycles" 151 depends on DRM_I915 152 default n 153 help 154 Choose this option to turn on extra driver debugging that may affect 155 performance but will catch some internal issues. 156 157 Recommended for driver developers only. 158 159 If in doubt, say "N". 160 161config DRM_I915_DEBUG_GUC 162 bool "Enable additional driver debugging for GuC" 163 depends on DRM_I915 164 select STACKDEPOT 165 default n 166 help 167 Choose this option to turn on extra driver debugging that may affect 168 performance but will help resolve GuC related issues. 169 170 Recommended for driver developers only. 171 172 If in doubt, say "N". 173 174config DRM_I915_SELFTEST 175 bool "Enable selftests upon driver load" 176 depends on DRM_I915 177 default n 178 select DRM_EXPORT_FOR_TESTS if m 179 select FAULT_INJECTION 180 select PRIME_NUMBERS 181 select CRC32 182 help 183 Choose this option to allow the driver to perform selftests upon 184 loading; also requires the i915.selftest=1 module parameter. To 185 exit the module after running the selftests (i.e. to prevent normal 186 module initialisation afterwards) use i915.selftest=-1. 187 188 Recommended for driver developers only. 189 190 If in doubt, say "N". 191 192config DRM_I915_SELFTEST_BROKEN 193 bool "Enable broken and dangerous selftests" 194 depends on DRM_I915_SELFTEST 195 depends on BROKEN 196 default n 197 help 198 This option enables the execution of selftests that are "dangerous" 199 and may trigger unintended HW side-effects as they break strict 200 rules given in the HW specification. For science. 201 202 Recommended for masochistic driver developers only. 203 204 If in doubt, say "N". 205 206config DRM_I915_LOW_LEVEL_TRACEPOINTS 207 bool "Enable low level request tracing events" 208 depends on DRM_I915 209 default n 210 help 211 Choose this option to turn on low level request tracing events. 212 This provides the ability to precisely monitor engine utilisation 213 and also analyze the request dependency resolving timeline. 214 215 Recommended for driver developers only. 216 217 If in doubt, say "N". 218 219config DRM_I915_DEBUG_VBLANK_EVADE 220 bool "Enable extra debug warnings for vblank evasion" 221 depends on DRM_I915 222 default n 223 help 224 Choose this option to turn on extra debug warnings for the 225 vblank evade mechanism. This gives a warning every time the 226 the deadline allotted for the vblank evade critical section 227 is exceeded, even if there isn't an actual risk of missing 228 the vblank. 229 230 Recommended for driver developers only. 231 232 If in doubt, say "N". 233 234config DRM_I915_DEBUG_RUNTIME_PM 235 bool "Enable extra state checking for runtime PM" 236 depends on DRM_I915 237 default n 238 select REF_TRACKER 239 select STACKDEPOT 240 select STACKTRACE 241 help 242 Choose this option to turn on extra state checking for the 243 runtime PM functionality. This may introduce overhead during 244 driver loading, suspend and resume operations. 245 246 Recommended for driver developers only. 247 248 If in doubt, say "N" 249 250config DRM_I915_DEBUG_WAKEREF 251 bool "Enable extra tracking for wakerefs" 252 depends on DRM_I915 253 select REF_TRACKER 254 select STACKDEPOT 255 select STACKTRACE 256 help 257 Choose this option to turn on extra state checking and usage 258 tracking for the wakerefPM functionality. This may introduce 259 overhead during driver runtime. 260 261 If in doubt, say "N" 262