# SPDX-License-Identifier: GPL-2.0-only config DRM_I915_WERROR bool "Force GCC to throw an error instead of a warning when compiling" # As this may inadvertently break the build, only allow the user # to shoot oneself in the foot iff they aim really hard depends on EXPERT # We use the dependency on !COMPILE_TEST to not be enabled in # allmodconfig or allyesconfig configurations depends on !COMPILE_TEST default n help Add -Werror to the build flags for (and only for) i915.ko. Do not enable this unless you are writing code for the i915.ko module. Recommended for driver developers only. If in doubt, say "N". config DRM_I915_DEBUG bool "Enable additional driver debugging" depends on DRM_I915 depends on EXPERT # only for developers depends on !COMPILE_TEST # never built by robots select DEBUG_FS select PREEMPT_COUNT select I2C_CHARDEV select STACKDEPOT select DRM_DP_AUX_CHARDEV select X86_MSR # used by igt/pm_rpm select DRM_VGEM # used by igt/prime_vgem (dmabuf interop checks) select DRM_DEBUG_MM if DRM=y select DRM_EXPORT_FOR_TESTS if m select DRM_DEBUG_SELFTEST select DMABUF_SELFTESTS select SW_SYNC # signaling validation framework (igt/syncobj*) select DRM_I915_WERROR select DRM_I915_DEBUG_GEM select DRM_I915_DEBUG_GEM_ONCE select DRM_I915_DEBUG_MMIO select DRM_I915_DEBUG_RUNTIME_PM select DRM_I915_SW_FENCE_DEBUG_OBJECTS select DRM_I915_SELFTEST default n help Choose this option to turn on extra driver debugging that may affect performance but will catch some internal issues. Recommended for driver developers only. If in doubt, say "N". config DRM_I915_DEBUG_MMIO bool "Always insert extra checks around mmio access by default" default n help By default, always enables the extra sanity checks (extra register reads) around every mmio (register) access that will slow the system down. This sets the default value of i915.mmio_debug to -1 and can be overridden at module load. Recommended for driver developers only. If in doubt, say "N". config DRM_I915_DEBUG_GEM bool "Insert extra checks into the GEM internals" default n depends on DRM_I915_WERROR help Enable extra sanity checks (including BUGs) along the GEM driver paths that may slow the system down and if hit hang the machine. Recommended for driver developers only. If in doubt, say "N". config DRM_I915_DEBUG_GEM_ONCE bool "Make a GEM debug failure fatal" default n depends on DRM_I915_DEBUG_GEM help During development, we often only want the very first failure as that would otherwise be lost in the deluge of subsequent failures. However, more casual testers may not want to trigger a hard BUG_ON and hope that the system remains sufficiently usable to capture a bug report in situ. Recommended for driver developers only. If in doubt, say "N". config DRM_I915_ERRLOG_GEM bool "Insert extra logging (very verbose) for common GEM errors" default n depends on DRM_I915_DEBUG_GEM help Enable additional logging that may help track down the cause of principally userspace errors. Recommended for driver developers only. If in doubt, say "N". config DRM_I915_TRACE_GEM bool "Insert extra ftrace output from the GEM internals" depends on DRM_I915_DEBUG_GEM select TRACING default n help Enable additional and verbose debugging output that will spam ordinary tests, but may be vital for post-mortem debugging when used with /proc/sys/kernel/ftrace_dump_on_oops Recommended for driver developers only. If in doubt, say "N". config DRM_I915_TRACE_GTT bool "Insert extra ftrace output from the GTT internals" depends on DRM_I915_DEBUG_GEM select TRACING default n help Enable additional and verbose debugging output that will spam ordinary tests, but may be vital for post-mortem debugging when used with /proc/sys/kernel/ftrace_dump_on_oops Recommended for driver developers only. If in doubt, say "N". config DRM_I915_SW_FENCE_DEBUG_OBJECTS bool "Enable additional driver debugging for fence objects" depends on DRM_I915 select DEBUG_OBJECTS default n help Choose this option to turn on extra driver debugging that may affect performance but will catch some internal issues. Recommended for driver developers only. If in doubt, say "N". config DRM_I915_SW_FENCE_CHECK_DAG bool "Enable additional driver debugging for detecting dependency cycles" depends on DRM_I915 default n help Choose this option to turn on extra driver debugging that may affect performance but will catch some internal issues. Recommended for driver developers only. If in doubt, say "N". config DRM_I915_DEBUG_GUC bool "Enable additional driver debugging for GuC" depends on DRM_I915 select STACKDEPOT default n help Choose this option to turn on extra driver debugging that may affect performance but will help resolve GuC related issues. Recommended for driver developers only. If in doubt, say "N". config DRM_I915_SELFTEST bool "Enable selftests upon driver load" depends on DRM_I915 default n select DRM_EXPORT_FOR_TESTS if m select FAULT_INJECTION select PRIME_NUMBERS select CRC32 help Choose this option to allow the driver to perform selftests upon loading; also requires the i915.selftest=1 module parameter. To exit the module after running the selftests (i.e. to prevent normal module initialisation afterwards) use i915.selftest=-1. Recommended for driver developers only. If in doubt, say "N". config DRM_I915_SELFTEST_BROKEN bool "Enable broken and dangerous selftests" depends on DRM_I915_SELFTEST depends on BROKEN default n help This option enables the execution of selftests that are "dangerous" and may trigger unintended HW side-effects as they break strict rules given in the HW specification. For science. Recommended for masochistic driver developers only. If in doubt, say "N". config DRM_I915_LOW_LEVEL_TRACEPOINTS bool "Enable low level request tracing events" depends on DRM_I915 default n help Choose this option to turn on low level request tracing events. This provides the ability to precisely monitor engine utilisation and also analyze the request dependency resolving timeline. Recommended for driver developers only. If in doubt, say "N". config DRM_I915_DEBUG_VBLANK_EVADE bool "Enable extra debug warnings for vblank evasion" depends on DRM_I915 default n help Choose this option to turn on extra debug warnings for the vblank evade mechanism. This gives a warning every time the the deadline allotted for the vblank evade critical section is exceeded, even if there isn't an actual risk of missing the vblank. Recommended for driver developers only. If in doubt, say "N". config DRM_I915_DEBUG_RUNTIME_PM bool "Enable extra state checking for runtime PM" depends on DRM_I915 default n select STACKDEPOT help Choose this option to turn on extra state checking for the runtime PM functionality. This may introduce overhead during driver loading, suspend and resume operations. Recommended for driver developers only. If in doubt, say "N"