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 STACKDEPOT
 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
 43	default n
 44	help
 45	  Choose this option to turn on extra driver debugging that may affect
 46	  performance but will catch some internal issues.
 47
 48	  Recommended for driver developers only.
 49
 50	  If in doubt, say "N".
 51
 52config DRM_I915_DEBUG_MMIO
 53	bool "Always insert extra checks around mmio access by default"
 54	default n
 55	help
 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.
 60
 61	  Recommended for driver developers only.
 62
 63	  If in doubt, say "N".
 64
 65config DRM_I915_DEBUG_GEM
 66	bool "Insert extra checks into the GEM internals"
 67	default n
 68	depends on DRM_I915_WERROR
 69	help
 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.
 72
 73	  Recommended for driver developers only.
 74
 75	  If in doubt, say "N".
 76
 77config DRM_I915_DEBUG_GEM_ONCE
 78	bool "Make a GEM debug failure fatal"
 79	default n
 80	depends on DRM_I915_DEBUG_GEM
 81	help
 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.
 87
 88	  Recommended for driver developers only.
 89
 90	  If in doubt, say "N".
 91
 92config DRM_I915_ERRLOG_GEM
 93	bool "Insert extra logging (very verbose) for common GEM errors"
 94	default n
 95	depends on DRM_I915_DEBUG_GEM
 96	help
 97	  Enable additional logging that may help track down the cause of
 98	  principally userspace errors.
 99
100	  Recommended for driver developers only.
101
102	  If in doubt, say "N".
103
104config DRM_I915_TRACE_GEM
105	bool "Insert extra ftrace output from the GEM internals"
106	depends on DRM_I915_DEBUG_GEM
107	select TRACING
108	default n
109	help
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
113
114	  Recommended for driver developers only.
115
116	  If in doubt, say "N".
117
118config DRM_I915_TRACE_GTT
119	bool "Insert extra ftrace output from the GTT internals"
120	depends on DRM_I915_DEBUG_GEM
121	select TRACING
122	default n
123	help
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
127
128	  Recommended for driver developers only.
129
130	  If in doubt, say "N".
131
132config DRM_I915_SW_FENCE_DEBUG_OBJECTS
133	bool "Enable additional driver debugging for fence objects"
134	depends on DRM_I915
135	select DEBUG_OBJECTS
136	default n
137	help
138	  Choose this option to turn on extra driver debugging that may affect
139	  performance but will catch some internal issues.
140
141	  Recommended for driver developers only.
142
143	  If in doubt, say "N".
144
145config DRM_I915_SW_FENCE_CHECK_DAG
146	bool "Enable additional driver debugging for detecting dependency cycles"
147	depends on DRM_I915
148	default n
149	help
150	  Choose this option to turn on extra driver debugging that may affect
151	  performance but will catch some internal issues.
152
153	  Recommended for driver developers only.
154
155	  If in doubt, say "N".
156
157config DRM_I915_DEBUG_GUC
158	bool "Enable additional driver debugging for GuC"
159	depends on DRM_I915
160	default n
161	help
162	  Choose this option to turn on extra driver debugging that may affect
163	  performance but will help resolve GuC related issues.
164
165	  Recommended for driver developers only.
166
167	  If in doubt, say "N".
168
169config DRM_I915_SELFTEST
170	bool "Enable selftests upon driver load"
171	depends on DRM_I915
172	default n
173	select DRM_EXPORT_FOR_TESTS if m
174	select FAULT_INJECTION
175	select PRIME_NUMBERS
176	select CRC32
177	help
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.
182
183	  Recommended for driver developers only.
184
185	  If in doubt, say "N".
186
187config DRM_I915_SELFTEST_BROKEN
188	bool "Enable broken and dangerous selftests"
189	depends on DRM_I915_SELFTEST
190	depends on BROKEN
191	default n
192	help
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.
196
197	  Recommended for masochistic driver developers only.
198
199	  If in doubt, say "N".
200
201config DRM_I915_LOW_LEVEL_TRACEPOINTS
202	bool "Enable low level request tracing events"
203	depends on DRM_I915
204	default n
205	help
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.
209
210	  If in doubt, say "N".
211
212config DRM_I915_DEBUG_VBLANK_EVADE
213	bool "Enable extra debug warnings for vblank evasion"
214	depends on DRM_I915
215	default n
216	help
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
221	  the vblank.
222
223	  If in doubt, say "N".
224
225config DRM_I915_DEBUG_RUNTIME_PM
226	bool "Enable extra state checking for runtime PM"
227	depends on DRM_I915
228	default n
229	select STACKDEPOT
230	help
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.
234
235	  If in doubt, say "N"