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	select STACKDEPOT
161	default n
162	help
163	  Choose this option to turn on extra driver debugging that may affect
164	  performance but will help resolve GuC related issues.
165
166	  Recommended for driver developers only.
167
168	  If in doubt, say "N".
169
170config DRM_I915_SELFTEST
171	bool "Enable selftests upon driver load"
172	depends on DRM_I915
173	default n
174	select DRM_EXPORT_FOR_TESTS if m
175	select FAULT_INJECTION
176	select PRIME_NUMBERS
177	select CRC32
178	help
179	  Choose this option to allow the driver to perform selftests upon
180	  loading; also requires the i915.selftest=1 module parameter. To
181	  exit the module after running the selftests (i.e. to prevent normal
182	  module initialisation afterwards) use i915.selftest=-1.
183
184	  Recommended for driver developers only.
185
186	  If in doubt, say "N".
187
188config DRM_I915_SELFTEST_BROKEN
189	bool "Enable broken and dangerous selftests"
190	depends on DRM_I915_SELFTEST
191	depends on BROKEN
192	default n
193	help
194	  This option enables the execution of selftests that are "dangerous"
195	  and may trigger unintended HW side-effects as they break strict
196	  rules given in the HW specification. For science.
197
198	  Recommended for masochistic driver developers only.
199
200	  If in doubt, say "N".
201
202config DRM_I915_LOW_LEVEL_TRACEPOINTS
203	bool "Enable low level request tracing events"
204	depends on DRM_I915
205	default n
206	help
207	  Choose this option to turn on low level request tracing events.
208	  This provides the ability to precisely monitor engine utilisation
209	  and also analyze the request dependency resolving timeline.
210
211	  Recommended for driver developers only.
212
213	  If in doubt, say "N".
214
215config DRM_I915_DEBUG_VBLANK_EVADE
216	bool "Enable extra debug warnings for vblank evasion"
217	depends on DRM_I915
218	default n
219	help
220	  Choose this option to turn on extra debug warnings for the
221	  vblank evade mechanism. This gives a warning every time the
222	  the deadline allotted for the vblank evade critical section
223	  is exceeded, even if there isn't an actual risk of missing
224	  the vblank.
225
226	  Recommended for driver developers only.
227
228	  If in doubt, say "N".
229
230config DRM_I915_DEBUG_RUNTIME_PM
231	bool "Enable extra state checking for runtime PM"
232	depends on DRM_I915
233	default n
234	select STACKDEPOT
235	help
236	  Choose this option to turn on extra state checking for the
237	  runtime PM functionality. This may introduce overhead during
238	  driver loading, suspend and resume operations.
239
240	  Recommended for driver developers only.
241
242	  If in doubt, say "N"
243