1 # SPDX-License-Identifier: GPL-2.0-only
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
7 # We use the dependency on !COMPILE_TEST to not be enabled in
8 # allmodconfig or allyesconfig configurations
9 depends on !COMPILE_TEST
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.
15 Recommended for driver developers only.
20 bool "Enable additional driver debugging"
22 depends on EXPERT # only for developers
23 depends on !COMPILE_TEST # never built by robots
28 select DRM_DP_AUX_CHARDEV
29 select X86_MSR # used by igt/pm_rpm
30 select DRM_VGEM # used by igt/prime_vgem (dmabuf interop checks)
31 select DRM_DEBUG_MM if DRM=y
32 select DRM_EXPORT_FOR_TESTS if m
33 select DRM_DEBUG_SELFTEST
34 select DMABUF_SELFTESTS
35 select SW_SYNC # signaling validation framework (igt/syncobj*)
36 select DRM_I915_WERROR
37 select DRM_I915_DEBUG_GEM
38 select DRM_I915_DEBUG_GEM_ONCE
39 select DRM_I915_DEBUG_MMIO
40 select DRM_I915_DEBUG_RUNTIME_PM
41 select DRM_I915_SW_FENCE_DEBUG_OBJECTS
42 select DRM_I915_SELFTEST
45 Choose this option to turn on extra driver debugging that may affect
46 performance but will catch some internal issues.
48 Recommended for driver developers only.
52 config DRM_I915_DEBUG_MMIO
53 bool "Always insert extra checks around mmio access by default"
56 By default, always enables the extra sanity checks (extra register
57 reads) around every mmio (register) access that will slow the system
58 down. This sets the default value of i915.mmio_debug to -1 and can
59 be overridden at module load.
61 Recommended for driver developers only.
65 config DRM_I915_DEBUG_GEM
66 bool "Insert extra checks into the GEM internals"
68 depends on DRM_I915_WERROR
70 Enable extra sanity checks (including BUGs) along the GEM driver
71 paths that may slow the system down and if hit hang the machine.
73 Recommended for driver developers only.
77 config DRM_I915_DEBUG_GEM_ONCE
78 bool "Make a GEM debug failure fatal"
80 depends on DRM_I915_DEBUG_GEM
82 During development, we often only want the very first failure
83 as that would otherwise be lost in the deluge of subsequent
84 failures. However, more casual testers may not want to trigger
85 a hard BUG_ON and hope that the system remains sufficiently usable
86 to capture a bug report in situ.
88 Recommended for driver developers only.
92 config DRM_I915_ERRLOG_GEM
93 bool "Insert extra logging (very verbose) for common GEM errors"
95 depends on DRM_I915_DEBUG_GEM
97 Enable additional logging that may help track down the cause of
98 principally userspace errors.
100 Recommended for driver developers only.
102 If in doubt, say "N".
104 config DRM_I915_TRACE_GEM
105 bool "Insert extra ftrace output from the GEM internals"
106 depends on DRM_I915_DEBUG_GEM
110 Enable additional and verbose debugging output that will spam
111 ordinary tests, but may be vital for post-mortem debugging when
112 used with /proc/sys/kernel/ftrace_dump_on_oops
114 Recommended for driver developers only.
116 If in doubt, say "N".
118 config DRM_I915_TRACE_GTT
119 bool "Insert extra ftrace output from the GTT internals"
120 depends on DRM_I915_DEBUG_GEM
124 Enable additional and verbose debugging output that will spam
125 ordinary tests, but may be vital for post-mortem debugging when
126 used with /proc/sys/kernel/ftrace_dump_on_oops
128 Recommended for driver developers only.
130 If in doubt, say "N".
132 config DRM_I915_SW_FENCE_DEBUG_OBJECTS
133 bool "Enable additional driver debugging for fence objects"
138 Choose this option to turn on extra driver debugging that may affect
139 performance but will catch some internal issues.
141 Recommended for driver developers only.
143 If in doubt, say "N".
145 config DRM_I915_SW_FENCE_CHECK_DAG
146 bool "Enable additional driver debugging for detecting dependency cycles"
150 Choose this option to turn on extra driver debugging that may affect
151 performance but will catch some internal issues.
153 Recommended for driver developers only.
155 If in doubt, say "N".
157 config DRM_I915_DEBUG_GUC
158 bool "Enable additional driver debugging for GuC"
162 Choose this option to turn on extra driver debugging that may affect
163 performance but will help resolve GuC related issues.
165 Recommended for driver developers only.
167 If in doubt, say "N".
169 config DRM_I915_SELFTEST
170 bool "Enable selftests upon driver load"
173 select DRM_EXPORT_FOR_TESTS if m
174 select FAULT_INJECTION
178 Choose this option to allow the driver to perform selftests upon
179 loading; also requires the i915.selftest=1 module parameter. To
180 exit the module after running the selftests (i.e. to prevent normal
181 module initialisation afterwards) use i915.selftest=-1.
183 Recommended for driver developers only.
185 If in doubt, say "N".
187 config DRM_I915_SELFTEST_BROKEN
188 bool "Enable broken and dangerous selftests"
189 depends on DRM_I915_SELFTEST
193 This option enables the execution of selftests that are "dangerous"
194 and may trigger unintended HW side-effects as they break strict
195 rules given in the HW specification. For science.
197 Recommended for masochistic driver developers only.
199 If in doubt, say "N".
201 config DRM_I915_LOW_LEVEL_TRACEPOINTS
202 bool "Enable low level request tracing events"
206 Choose this option to turn on low level request tracing events.
207 This provides the ability to precisely monitor engine utilisation
208 and also analyze the request dependency resolving timeline.
210 If in doubt, say "N".
212 config DRM_I915_DEBUG_VBLANK_EVADE
213 bool "Enable extra debug warnings for vblank evasion"
217 Choose this option to turn on extra debug warnings for the
218 vblank evade mechanism. This gives a warning every time the
219 the deadline allotted for the vblank evade critical section
220 is exceeded, even if there isn't an actual risk of missing
223 If in doubt, say "N".
225 config DRM_I915_DEBUG_RUNTIME_PM
226 bool "Enable extra state checking for runtime PM"
231 Choose this option to turn on extra state checking for the
232 runtime PM functionality. This may introduce overhead during
233 driver loading, suspend and resume operations.