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"
26 select DRM_DP_AUX_CHARDEV
27 select X86_MSR # used by igt/pm_rpm
28 select DRM_VGEM # used by igt/prime_vgem (dmabuf interop checks)
29 select DRM_DEBUG_MM if DRM=y
30 select DRM_EXPORT_FOR_TESTS if m
31 select DRM_DEBUG_SELFTEST
32 select DMABUF_SELFTESTS
33 select SW_SYNC # signaling validation framework (igt/syncobj*)
34 select DRM_I915_WERROR
35 select DRM_I915_DEBUG_GEM
36 select DRM_I915_DEBUG_GEM_ONCE
37 select DRM_I915_DEBUG_MMIO
38 select DRM_I915_DEBUG_RUNTIME_PM
39 select DRM_I915_SW_FENCE_DEBUG_OBJECTS
40 select DRM_I915_SELFTEST
43 Choose this option to turn on extra driver debugging that may affect
44 performance but will catch some internal issues.
46 Recommended for driver developers only.
50 config DRM_I915_DEBUG_MMIO
51 bool "Always insert extra checks around mmio access by default"
54 By default, always enables the extra sanity checks (extra register
55 reads) around every mmio (register) access that will slow the system
56 down. This sets the default value of i915.mmio_debug to -1 and can
57 be overridden at module load.
59 Recommended for driver developers only.
63 config DRM_I915_DEBUG_GEM
64 bool "Insert extra checks into the GEM internals"
66 depends on DRM_I915_WERROR
68 Enable extra sanity checks (including BUGs) along the GEM driver
69 paths that may slow the system down and if hit hang the machine.
71 Recommended for driver developers only.
75 config DRM_I915_DEBUG_GEM_ONCE
76 bool "Make a GEM debug failure fatal"
78 depends on DRM_I915_DEBUG_GEM
80 During development, we often only want the very first failure
81 as that would otherwise be lost in the deluge of subsequent
82 failures. However, more casual testers may not want to trigger
83 a hard BUG_ON and hope that the system remains sufficiently usable
84 to capture a bug report in situ.
86 Recommended for driver developers only.
90 config DRM_I915_ERRLOG_GEM
91 bool "Insert extra logging (very verbose) for common GEM errors"
93 depends on DRM_I915_DEBUG_GEM
95 Enable additional logging that may help track down the cause of
96 principally userspace errors.
98 Recommended for driver developers only.
100 If in doubt, say "N".
102 config DRM_I915_TRACE_GEM
103 bool "Insert extra ftrace output from the GEM internals"
104 depends on DRM_I915_DEBUG_GEM
108 Enable additional and verbose debugging output that will spam
109 ordinary tests, but may be vital for post-mortem debugging when
110 used with /proc/sys/kernel/ftrace_dump_on_oops
112 Recommended for driver developers only.
114 If in doubt, say "N".
116 config DRM_I915_TRACE_GTT
117 bool "Insert extra ftrace output from the GTT internals"
118 depends on DRM_I915_DEBUG_GEM
122 Enable additional and verbose debugging output that will spam
123 ordinary tests, but may be vital for post-mortem debugging when
124 used with /proc/sys/kernel/ftrace_dump_on_oops
126 Recommended for driver developers only.
128 If in doubt, say "N".
130 config DRM_I915_SW_FENCE_DEBUG_OBJECTS
131 bool "Enable additional driver debugging for fence objects"
136 Choose this option to turn on extra driver debugging that may affect
137 performance but will catch some internal issues.
139 Recommended for driver developers only.
141 If in doubt, say "N".
143 config DRM_I915_SW_FENCE_CHECK_DAG
144 bool "Enable additional driver debugging for detecting dependency cycles"
148 Choose this option to turn on extra driver debugging that may affect
149 performance but will catch some internal issues.
151 Recommended for driver developers only.
153 If in doubt, say "N".
155 config DRM_I915_DEBUG_GUC
156 bool "Enable additional driver debugging for GuC"
160 Choose this option to turn on extra driver debugging that may affect
161 performance but will help resolve GuC related issues.
163 Recommended for driver developers only.
165 If in doubt, say "N".
167 config DRM_I915_SELFTEST
168 bool "Enable selftests upon driver load"
171 select DRM_EXPORT_FOR_TESTS if m
172 select FAULT_INJECTION
176 Choose this option to allow the driver to perform selftests upon
177 loading; also requires the i915.selftest=1 module parameter. To
178 exit the module after running the selftests (i.e. to prevent normal
179 module initialisation afterwards) use i915.selftest=-1.
181 Recommended for driver developers only.
183 If in doubt, say "N".
185 config DRM_I915_SELFTEST_BROKEN
186 bool "Enable broken and dangerous selftests"
187 depends on DRM_I915_SELFTEST
191 This option enables the execution of selftests that are "dangerous"
192 and may trigger unintended HW side-effects as they break strict
193 rules given in the HW specification. For science.
195 Recommended for masochistic driver developers only.
197 If in doubt, say "N".
199 config DRM_I915_LOW_LEVEL_TRACEPOINTS
200 bool "Enable low level request tracing events"
204 Choose this option to turn on low level request tracing events.
205 This provides the ability to precisely monitor engine utilisation
206 and also analyze the request dependency resolving timeline.
208 If in doubt, say "N".
210 config DRM_I915_DEBUG_VBLANK_EVADE
211 bool "Enable extra debug warnings for vblank evasion"
215 Choose this option to turn on extra debug warnings for the
216 vblank evade mechanism. This gives a warning every time the
217 the deadline allotted for the vblank evade critical section
218 is exceeded, even if there isn't an actual risk of missing
221 If in doubt, say "N".
223 config DRM_I915_DEBUG_RUNTIME_PM
224 bool "Enable extra state checking for runtime PM"
229 Choose this option to turn on extra state checking for the
230 runtime PM functionality. This may introduce overhead during
231 driver loading, suspend and resume operations.