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"
27 select DRM_DP_AUX_CHARDEV
28 select X86_MSR # used by igt/pm_rpm
29 select DRM_VGEM # used by igt/prime_vgem (dmabuf interop checks)
30 select DRM_DEBUG_MM if DRM=y
31 select DRM_DEBUG_SELFTEST
32 select SW_SYNC # signaling validation framework (igt/syncobj*)
33 select DRM_I915_SW_FENCE_DEBUG_OBJECTS
34 select DRM_I915_SELFTEST
35 select DRM_I915_DEBUG_RUNTIME_PM
36 select DRM_I915_DEBUG_MMIO
39 Choose this option to turn on extra driver debugging that may affect
40 performance but will catch some internal issues.
42 Recommended for driver developers only.
46 config DRM_I915_DEBUG_MMIO
47 bool "Always insert extra checks around mmio access by default"
50 By default, always enables the extra sanity checks (extra register
51 reads) around every mmio (register) access that will slow the system
52 down. This sets the default value of i915.mmio_debug to -1 and can
53 be overridden at module load.
55 Recommended for driver developers only.
59 config DRM_I915_DEBUG_GEM
60 bool "Insert extra checks into the GEM internals"
62 depends on DRM_I915_WERROR
64 Enable extra sanity checks (including BUGs) along the GEM driver
65 paths that may slow the system down and if hit hang the machine.
67 Recommended for driver developers only.
71 config DRM_I915_ERRLOG_GEM
72 bool "Insert extra logging (very verbose) for common GEM errors"
74 depends on DRM_I915_DEBUG_GEM
76 Enable additional logging that may help track down the cause of
77 principally userspace errors.
79 Recommended for driver developers only.
83 config DRM_I915_TRACE_GEM
84 bool "Insert extra ftrace output from the GEM internals"
85 depends on DRM_I915_DEBUG_GEM
89 Enable additional and verbose debugging output that will spam
90 ordinary tests, but may be vital for post-mortem debugging when
91 used with /proc/sys/kernel/ftrace_dump_on_oops
93 Recommended for driver developers only.
97 config DRM_I915_TRACE_GTT
98 bool "Insert extra ftrace output from the GTT internals"
99 depends on DRM_I915_DEBUG_GEM
103 Enable additional and verbose debugging output that will spam
104 ordinary tests, but may be vital for post-mortem debugging when
105 used with /proc/sys/kernel/ftrace_dump_on_oops
107 Recommended for driver developers only.
109 If in doubt, say "N".
111 config DRM_I915_SW_FENCE_DEBUG_OBJECTS
112 bool "Enable additional driver debugging for fence objects"
117 Choose this option to turn on extra driver debugging that may affect
118 performance but will catch some internal issues.
120 Recommended for driver developers only.
122 If in doubt, say "N".
124 config DRM_I915_SW_FENCE_CHECK_DAG
125 bool "Enable additional driver debugging for detecting dependency cycles"
129 Choose this option to turn on extra driver debugging that may affect
130 performance but will catch some internal issues.
132 Recommended for driver developers only.
134 If in doubt, say "N".
136 config DRM_I915_DEBUG_GUC
137 bool "Enable additional driver debugging for GuC"
141 Choose this option to turn on extra driver debugging that may affect
142 performance but will help resolve GuC related issues.
144 Recommended for driver developers only.
146 If in doubt, say "N".
148 config DRM_I915_SELFTEST
149 bool "Enable selftests upon driver load"
152 select FAULT_INJECTION
155 Choose this option to allow the driver to perform selftests upon
156 loading; also requires the i915.selftest=1 module parameter. To
157 exit the module after running the selftests (i.e. to prevent normal
158 module initialisation afterwards) use i915.selftest=-1.
160 Recommended for driver developers only.
162 If in doubt, say "N".
164 config DRM_I915_SELFTEST_BROKEN
165 bool "Enable broken and dangerous selftests"
166 depends on DRM_I915_SELFTEST
170 This option enables the execution of selftests that are "dangerous"
171 and may trigger unintended HW side-effects as they break strict
172 rules given in the HW specification. For science.
174 Recommended for masochistic driver developers only.
176 If in doubt, say "N".
178 config DRM_I915_LOW_LEVEL_TRACEPOINTS
179 bool "Enable low level request tracing events"
183 Choose this option to turn on low level request tracing events.
184 This provides the ability to precisely monitor engine utilisation
185 and also analyze the request dependency resolving timeline.
187 If in doubt, say "N".
189 config DRM_I915_DEBUG_VBLANK_EVADE
190 bool "Enable extra debug warnings for vblank evasion"
194 Choose this option to turn on extra debug warnings for the
195 vblank evade mechanism. This gives a warning every time the
196 the deadline allotted for the vblank evade critical section
197 is exceeded, even if there isn't an actual risk of missing
200 If in doubt, say "N".
202 config DRM_I915_DEBUG_RUNTIME_PM
203 bool "Enable extra state checking for runtime PM"
208 Choose this option to turn on extra state checking for the
209 runtime PM functionality. This may introduce overhead during
210 driver loading, suspend and resume operations.