Bug Summary

File:dev/pci/drm/amd/display/dc/gpio/gpio_service.c
Warning:line 437, column 3
Value stored to 'id' is never read

Annotated Source Code

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clang -cc1 -cc1 -triple amd64-unknown-openbsd7.4 -analyze -disable-free -clear-ast-before-backend -disable-llvm-verifier -discard-value-names -main-file-name gpio_service.c -analyzer-checker=core -analyzer-checker=apiModeling -analyzer-checker=unix -analyzer-checker=deadcode -analyzer-checker=security.insecureAPI.UncheckedReturn -analyzer-checker=security.insecureAPI.getpw -analyzer-checker=security.insecureAPI.gets -analyzer-checker=security.insecureAPI.mktemp -analyzer-checker=security.insecureAPI.mkstemp -analyzer-checker=security.insecureAPI.vfork -analyzer-checker=nullability.NullPassedToNonnull -analyzer-checker=nullability.NullReturnedFromNonnull -analyzer-output plist -w -setup-static-analyzer -mrelocation-model static -mframe-pointer=all -relaxed-aliasing -ffp-contract=on -fno-rounding-math -mconstructor-aliases -ffreestanding -mcmodel=kernel -target-cpu x86-64 -target-feature +retpoline-indirect-calls -target-feature +retpoline-indirect-branches -target-feature -sse2 -target-feature -sse -target-feature -3dnow -target-feature -mmx -target-feature +save-args -target-feature +retpoline-external-thunk -disable-red-zone -no-implicit-float -tune-cpu generic -debugger-tuning=gdb -fcoverage-compilation-dir=/usr/src/sys/arch/amd64/compile/GENERIC.MP/obj -nostdsysteminc -nobuiltininc -resource-dir /usr/local/llvm16/lib/clang/16 -I /usr/src/sys -I /usr/src/sys/arch/amd64/compile/GENERIC.MP/obj -I /usr/src/sys/arch -I /usr/src/sys/dev/pci/drm/include -I /usr/src/sys/dev/pci/drm/include/uapi -I /usr/src/sys/dev/pci/drm/amd/include/asic_reg -I /usr/src/sys/dev/pci/drm/amd/include -I /usr/src/sys/dev/pci/drm/amd/amdgpu -I /usr/src/sys/dev/pci/drm/amd/display -I /usr/src/sys/dev/pci/drm/amd/display/include -I /usr/src/sys/dev/pci/drm/amd/display/dc -I /usr/src/sys/dev/pci/drm/amd/display/amdgpu_dm -I /usr/src/sys/dev/pci/drm/amd/pm/inc -I /usr/src/sys/dev/pci/drm/amd/pm/legacy-dpm -I /usr/src/sys/dev/pci/drm/amd/pm/swsmu -I /usr/src/sys/dev/pci/drm/amd/pm/swsmu/inc -I /usr/src/sys/dev/pci/drm/amd/pm/swsmu/smu11 -I /usr/src/sys/dev/pci/drm/amd/pm/swsmu/smu12 -I /usr/src/sys/dev/pci/drm/amd/pm/swsmu/smu13 -I /usr/src/sys/dev/pci/drm/amd/pm/powerplay/inc -I /usr/src/sys/dev/pci/drm/amd/pm/powerplay/hwmgr -I /usr/src/sys/dev/pci/drm/amd/pm/powerplay/smumgr -I /usr/src/sys/dev/pci/drm/amd/pm/swsmu/inc -I /usr/src/sys/dev/pci/drm/amd/pm/swsmu/inc/pmfw_if -I /usr/src/sys/dev/pci/drm/amd/display/dc/inc -I /usr/src/sys/dev/pci/drm/amd/display/dc/inc/hw -I /usr/src/sys/dev/pci/drm/amd/display/dc/clk_mgr -I /usr/src/sys/dev/pci/drm/amd/display/modules/inc -I /usr/src/sys/dev/pci/drm/amd/display/modules/hdcp -I /usr/src/sys/dev/pci/drm/amd/display/dmub/inc -I /usr/src/sys/dev/pci/drm/i915 -D DDB -D DIAGNOSTIC -D KTRACE -D ACCOUNTING -D KMEMSTATS -D PTRACE -D POOL_DEBUG -D CRYPTO -D SYSVMSG -D SYSVSEM -D SYSVSHM -D UVM_SWAP_ENCRYPT -D FFS -D FFS2 -D FFS_SOFTUPDATES -D UFS_DIRHASH -D QUOTA -D EXT2FS -D MFS -D NFSCLIENT -D NFSSERVER -D CD9660 -D UDF -D MSDOSFS -D FIFO -D FUSE -D SOCKET_SPLICE -D TCP_ECN -D TCP_SIGNATURE -D INET6 -D IPSEC -D PPP_BSDCOMP -D PPP_DEFLATE -D PIPEX -D MROUTING -D MPLS -D BOOT_CONFIG -D USER_PCICONF -D APERTURE -D MTRR -D NTFS -D SUSPEND -D HIBERNATE -D PCIVERBOSE -D USBVERBOSE -D WSDISPLAY_COMPAT_USL -D WSDISPLAY_COMPAT_RAWKBD -D WSDISPLAY_DEFAULTSCREENS=6 -D X86EMU -D ONEWIREVERBOSE -D MULTIPROCESSOR -D MAXUSERS=80 -D _KERNEL -O2 -Wno-pointer-sign -Wno-address-of-packed-member -Wno-constant-conversion -Wno-unused-but-set-variable -Wno-gnu-folding-constant -fdebug-compilation-dir=/usr/src/sys/arch/amd64/compile/GENERIC.MP/obj -ferror-limit 19 -fwrapv -D_RET_PROTECTOR -ret-protector -fcf-protection=branch -fgnuc-version=4.2.1 -vectorize-loops -vectorize-slp -fno-builtin-malloc -fno-builtin-calloc -fno-builtin-realloc -fno-builtin-valloc -fno-builtin-free -fno-builtin-strdup -fno-builtin-strndup -analyzer-output=html -faddrsig -o /home/ben/Projects/scan/2024-01-11-110808-61670-1 -x c /usr/src/sys/dev/pci/drm/amd/display/dc/gpio/gpio_service.c
1/*
2 * Copyright 2012-15 Advanced Micro Devices, Inc.
3 *
4 * Permission is hereby granted, free of charge, to any person obtaining a
5 * copy of this software and associated documentation files (the "Software"),
6 * to deal in the Software without restriction, including without limitation
7 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
8 * and/or sell copies of the Software, and to permit persons to whom the
9 * Software is furnished to do so, subject to the following conditions:
10 *
11 * The above copyright notice and this permission notice shall be included in
12 * all copies or substantial portions of the Software.
13 *
14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
15 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
16 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
17 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
18 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
19 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
20 * OTHER DEALINGS IN THE SOFTWARE.
21 *
22 * Authors: AMD
23 *
24 */
25
26/*
27 * Pre-requisites: headers required by header of this unit
28 */
29
30#include "dm_services.h"
31#include "include/gpio_interface.h"
32#include "include/gpio_service_interface.h"
33#include "hw_translate.h"
34#include "hw_factory.h"
35
36/*
37 * Header of this unit
38 */
39
40#include "gpio_service.h"
41
42/*
43 * Post-requisites: headers required by this unit
44 */
45
46#include "hw_gpio.h"
47
48/*
49 * @brief
50 * Public API.
51 */
52
53struct gpio_service *dal_gpio_service_create(
54 enum dce_version dce_version,
55 enum dce_environment dce_environment,
56 struct dc_context *ctx)
57{
58 struct gpio_service *service;
59 uint32_t index_of_id;
60
61 service = kzalloc(sizeof(struct gpio_service), GFP_KERNEL(0x0001 | 0x0004));
62
63 if (!service) {
64 BREAK_TO_DEBUGGER()do { ___drm_dbg(((void *)0), DRM_UT_DRIVER, "%s():%d\n", __func__
, 64); do {} while (0); } while (0);
65 return NULL((void *)0);
66 }
67
68 if (!dal_hw_translate_init(&service->translate, dce_version,
69 dce_environment)) {
70 BREAK_TO_DEBUGGER()do { ___drm_dbg(((void *)0), DRM_UT_DRIVER, "%s():%d\n", __func__
, 70); do {} while (0); } while (0);
71 goto failure_1;
72 }
73
74 if (!dal_hw_factory_init(&service->factory, dce_version,
75 dce_environment)) {
76 BREAK_TO_DEBUGGER()do { ___drm_dbg(((void *)0), DRM_UT_DRIVER, "%s():%d\n", __func__
, 76); do {} while (0); } while (0);
77 goto failure_1;
78 }
79
80 /* allocate and initialize busyness storage */
81 {
82 index_of_id = 0;
83 service->ctx = ctx;
84
85 do {
86 uint32_t number_of_bits =
87 service->factory.number_of_pins[index_of_id];
88 uint32_t i = 0;
89
90 if (number_of_bits) {
91 service->busyness[index_of_id] =
92 kcalloc(number_of_bits, sizeof(char),
93 GFP_KERNEL(0x0001 | 0x0004));
94
95 if (!service->busyness[index_of_id]) {
96 BREAK_TO_DEBUGGER()do { ___drm_dbg(((void *)0), DRM_UT_DRIVER, "%s():%d\n", __func__
, 96); do {} while (0); } while (0);
97 goto failure_2;
98 }
99
100 do {
101 service->busyness[index_of_id][i] = 0;
102 ++i;
103 } while (i < number_of_bits);
104 } else {
105 service->busyness[index_of_id] = NULL((void *)0);
106 }
107
108 ++index_of_id;
109 } while (index_of_id < GPIO_ID_COUNT);
110 }
111
112 return service;
113
114failure_2:
115 while (index_of_id) {
116 --index_of_id;
117 kfree(service->busyness[index_of_id]);
118 }
119
120failure_1:
121 kfree(service);
122
123 return NULL((void *)0);
124}
125
126struct gpio *dal_gpio_service_create_irq(
127 struct gpio_service *service,
128 uint32_t offset,
129 uint32_t mask)
130{
131 enum gpio_id id;
132 uint32_t en;
133
134 if (!service->translate.funcs->offset_to_id(offset, mask, &id, &en)) {
135 ASSERT_CRITICAL(false)do { if (({ int __ret = !!(!(0)); if (__ret) printf("WARNING %s failed at %s:%d\n"
, "!(0)", "/usr/src/sys/dev/pci/drm/amd/display/dc/gpio/gpio_service.c"
, 135); __builtin_expect(!!(__ret), 0); })) do {} while (0); }
while (0);
136 return NULL((void *)0);
137 }
138
139 return dal_gpio_create_irq(service, id, en);
140}
141
142struct gpio *dal_gpio_service_create_generic_mux(
143 struct gpio_service *service,
144 uint32_t offset,
145 uint32_t mask)
146{
147 enum gpio_id id;
148 uint32_t en;
149 struct gpio *generic;
150
151 if (!service->translate.funcs->offset_to_id(offset, mask, &id, &en)) {
152 ASSERT_CRITICAL(false)do { if (({ int __ret = !!(!(0)); if (__ret) printf("WARNING %s failed at %s:%d\n"
, "!(0)", "/usr/src/sys/dev/pci/drm/amd/display/dc/gpio/gpio_service.c"
, 152); __builtin_expect(!!(__ret), 0); })) do {} while (0); }
while (0);
153 return NULL((void *)0);
154 }
155
156 generic = dal_gpio_create(
157 service, id, en, GPIO_PIN_OUTPUT_STATE_DEFAULT);
158
159 return generic;
160}
161
162void dal_gpio_destroy_generic_mux(
163 struct gpio **mux)
164{
165 if (!mux || !*mux) {
166 ASSERT_CRITICAL(false)do { if (({ int __ret = !!(!(0)); if (__ret) printf("WARNING %s failed at %s:%d\n"
, "!(0)", "/usr/src/sys/dev/pci/drm/amd/display/dc/gpio/gpio_service.c"
, 166); __builtin_expect(!!(__ret), 0); })) do {} while (0); }
while (0);
167 return;
168 }
169
170 dal_gpio_destroy(mux);
171 kfree(*mux);
172
173 *mux = NULL((void *)0);
174}
175
176struct gpio_pin_info dal_gpio_get_generic_pin_info(
177 struct gpio_service *service,
178 enum gpio_id id,
179 uint32_t en)
180{
181 struct gpio_pin_info pin;
182
183 if (service->translate.funcs->id_to_offset) {
184 service->translate.funcs->id_to_offset(id, en, &pin);
185 } else {
186 pin.mask = 0xFFFFFFFF;
187 pin.offset = 0xFFFFFFFF;
188 }
189
190 return pin;
191}
192
193void dal_gpio_service_destroy(
194 struct gpio_service **ptr)
195{
196 if (!ptr || !*ptr) {
197 BREAK_TO_DEBUGGER()do { ___drm_dbg(((void *)0), DRM_UT_DRIVER, "%s():%d\n", __func__
, 197); do {} while (0); } while (0);
198 return;
199 }
200
201 /* free business storage */
202 {
203 uint32_t index_of_id = 0;
204
205 do {
206 kfree((*ptr)->busyness[index_of_id]);
207
208 ++index_of_id;
209 } while (index_of_id < GPIO_ID_COUNT);
210 }
211
212 kfree(*ptr);
213
214 *ptr = NULL((void *)0);
215}
216
217enum gpio_result dal_mux_setup_config(
218 struct gpio *mux,
219 struct gpio_generic_mux_config *config)
220{
221 struct gpio_config_data config_data;
222
223 if (!config)
224 return GPIO_RESULT_INVALID_DATA;
225
226 config_data.config.generic_mux = *config;
227 config_data.type = GPIO_CONFIG_TYPE_GENERIC_MUX;
228
229 return dal_gpio_set_config(mux, &config_data);
230}
231
232/*
233 * @brief
234 * Private API.
235 */
236
237static bool_Bool is_pin_busy(
238 const struct gpio_service *service,
239 enum gpio_id id,
240 uint32_t en)
241{
242 return service->busyness[id][en];
243}
244
245static void set_pin_busy(
246 struct gpio_service *service,
247 enum gpio_id id,
248 uint32_t en)
249{
250 service->busyness[id][en] = true1;
251}
252
253static void set_pin_free(
254 struct gpio_service *service,
255 enum gpio_id id,
256 uint32_t en)
257{
258 service->busyness[id][en] = false0;
259}
260
261enum gpio_result dal_gpio_service_lock(
262 struct gpio_service *service,
263 enum gpio_id id,
264 uint32_t en)
265{
266 if (!service->busyness[id]) {
267 ASSERT_CRITICAL(false)do { if (({ int __ret = !!(!(0)); if (__ret) printf("WARNING %s failed at %s:%d\n"
, "!(0)", "/usr/src/sys/dev/pci/drm/amd/display/dc/gpio/gpio_service.c"
, 267); __builtin_expect(!!(__ret), 0); })) do {} while (0); }
while (0);
268 return GPIO_RESULT_OPEN_FAILED;
269 }
270
271 set_pin_busy(service, id, en);
272 return GPIO_RESULT_OK;
273}
274
275enum gpio_result dal_gpio_service_unlock(
276 struct gpio_service *service,
277 enum gpio_id id,
278 uint32_t en)
279{
280 if (!service->busyness[id]) {
281 ASSERT_CRITICAL(false)do { if (({ int __ret = !!(!(0)); if (__ret) printf("WARNING %s failed at %s:%d\n"
, "!(0)", "/usr/src/sys/dev/pci/drm/amd/display/dc/gpio/gpio_service.c"
, 281); __builtin_expect(!!(__ret), 0); })) do {} while (0); }
while (0);
282 return GPIO_RESULT_OPEN_FAILED;
283 }
284
285 set_pin_free(service, id, en);
286 return GPIO_RESULT_OK;
287}
288
289enum gpio_result dal_gpio_service_open(
290 struct gpio *gpio)
291{
292 struct gpio_service *service = gpio->service;
293 enum gpio_id id = gpio->id;
294 uint32_t en = gpio->en;
295 enum gpio_mode mode = gpio->mode;
296
297 struct hw_gpio_pin **pin = &gpio->pin;
298
299
300 if (!service->busyness[id]) {
301 ASSERT_CRITICAL(false)do { if (({ int __ret = !!(!(0)); if (__ret) printf("WARNING %s failed at %s:%d\n"
, "!(0)", "/usr/src/sys/dev/pci/drm/amd/display/dc/gpio/gpio_service.c"
, 301); __builtin_expect(!!(__ret), 0); })) do {} while (0); }
while (0);
302 return GPIO_RESULT_OPEN_FAILED;
303 }
304
305 if (is_pin_busy(service, id, en)) {
306 ASSERT_CRITICAL(false)do { if (({ int __ret = !!(!(0)); if (__ret) printf("WARNING %s failed at %s:%d\n"
, "!(0)", "/usr/src/sys/dev/pci/drm/amd/display/dc/gpio/gpio_service.c"
, 306); __builtin_expect(!!(__ret), 0); })) do {} while (0); }
while (0);
307 return GPIO_RESULT_DEVICE_BUSY;
308 }
309
310 switch (id) {
311 case GPIO_ID_DDC_DATA:
312 *pin = service->factory.funcs->get_ddc_pin(gpio);
313 service->factory.funcs->define_ddc_registers(*pin, en);
314 break;
315 case GPIO_ID_DDC_CLOCK:
316 *pin = service->factory.funcs->get_ddc_pin(gpio);
317 service->factory.funcs->define_ddc_registers(*pin, en);
318 break;
319 case GPIO_ID_GENERIC:
320 *pin = service->factory.funcs->get_generic_pin(gpio);
321 service->factory.funcs->define_generic_registers(*pin, en);
322 break;
323 case GPIO_ID_HPD:
324 *pin = service->factory.funcs->get_hpd_pin(gpio);
325 service->factory.funcs->define_hpd_registers(*pin, en);
326 break;
327
328 //TODO: gsl and sync support? create_sync and create_gsl are NULL
329 case GPIO_ID_SYNC:
330 case GPIO_ID_GSL:
331 break;
332 default:
333 ASSERT_CRITICAL(false)do { if (({ int __ret = !!(!(0)); if (__ret) printf("WARNING %s failed at %s:%d\n"
, "!(0)", "/usr/src/sys/dev/pci/drm/amd/display/dc/gpio/gpio_service.c"
, 333); __builtin_expect(!!(__ret), 0); })) do {} while (0); }
while (0);
334 return GPIO_RESULT_NON_SPECIFIC_ERROR;
335 }
336
337 if (!*pin) {
338 ASSERT_CRITICAL(false)do { if (({ int __ret = !!(!(0)); if (__ret) printf("WARNING %s failed at %s:%d\n"
, "!(0)", "/usr/src/sys/dev/pci/drm/amd/display/dc/gpio/gpio_service.c"
, 338); __builtin_expect(!!(__ret), 0); })) do {} while (0); }
while (0);
339 return GPIO_RESULT_NON_SPECIFIC_ERROR;
340 }
341
342 if (!(*pin)->funcs->open(*pin, mode)) {
343 ASSERT_CRITICAL(false)do { if (({ int __ret = !!(!(0)); if (__ret) printf("WARNING %s failed at %s:%d\n"
, "!(0)", "/usr/src/sys/dev/pci/drm/amd/display/dc/gpio/gpio_service.c"
, 343); __builtin_expect(!!(__ret), 0); })) do {} while (0); }
while (0);
344 dal_gpio_service_close(service, pin);
345 return GPIO_RESULT_OPEN_FAILED;
346 }
347
348 set_pin_busy(service, id, en);
349 return GPIO_RESULT_OK;
350}
351
352void dal_gpio_service_close(
353 struct gpio_service *service,
354 struct hw_gpio_pin **ptr)
355{
356 struct hw_gpio_pin *pin;
357
358 if (!ptr) {
359 ASSERT_CRITICAL(false)do { if (({ int __ret = !!(!(0)); if (__ret) printf("WARNING %s failed at %s:%d\n"
, "!(0)", "/usr/src/sys/dev/pci/drm/amd/display/dc/gpio/gpio_service.c"
, 359); __builtin_expect(!!(__ret), 0); })) do {} while (0); }
while (0);
360 return;
361 }
362
363 pin = *ptr;
364
365 if (pin) {
366 set_pin_free(service, pin->id, pin->en);
367
368 pin->funcs->close(pin);
369
370 *ptr = NULL((void *)0);
371 }
372}
373
374enum dc_irq_source dal_irq_get_source(
375 const struct gpio *irq)
376{
377 enum gpio_id id = dal_gpio_get_id(irq);
378
379 switch (id) {
380 case GPIO_ID_HPD:
381 return (enum dc_irq_source)(DC_IRQ_SOURCE_HPD1 +
382 dal_gpio_get_enum(irq));
383 case GPIO_ID_GPIO_PAD:
384 return (enum dc_irq_source)(DC_IRQ_SOURCE_GPIOPAD0 +
385 dal_gpio_get_enum(irq));
386 default:
387 return DC_IRQ_SOURCE_INVALID;
388 }
389}
390
391enum dc_irq_source dal_irq_get_rx_source(
392 const struct gpio *irq)
393{
394 enum gpio_id id = dal_gpio_get_id(irq);
395
396 switch (id) {
397 case GPIO_ID_HPD:
398 return (enum dc_irq_source)(DC_IRQ_SOURCE_HPD1RX +
399 dal_gpio_get_enum(irq));
400 default:
401 return DC_IRQ_SOURCE_INVALID;
402 }
403}
404
405enum gpio_result dal_irq_setup_hpd_filter(
406 struct gpio *irq,
407 struct gpio_hpd_config *config)
408{
409 struct gpio_config_data config_data;
410
411 if (!config)
412 return GPIO_RESULT_INVALID_DATA;
413
414 config_data.type = GPIO_CONFIG_TYPE_HPD;
415 config_data.config.hpd = *config;
416
417 return dal_gpio_set_config(irq, &config_data);
418}
419
420/*
421 * @brief
422 * Creation and destruction
423 */
424
425struct gpio *dal_gpio_create_irq(
426 struct gpio_service *service,
427 enum gpio_id id,
428 uint32_t en)
429{
430 struct gpio *irq;
431
432 switch (id) {
433 case GPIO_ID_HPD:
434 case GPIO_ID_GPIO_PAD:
435 break;
436 default:
437 id = GPIO_ID_HPD;
Value stored to 'id' is never read
438 ASSERT_CRITICAL(false)do { if (({ int __ret = !!(!(0)); if (__ret) printf("WARNING %s failed at %s:%d\n"
, "!(0)", "/usr/src/sys/dev/pci/drm/amd/display/dc/gpio/gpio_service.c"
, 438); __builtin_expect(!!(__ret), 0); })) do {} while (0); }
while (0);
439 return NULL((void *)0);
440 }
441
442 irq = dal_gpio_create(
443 service, id, en, GPIO_PIN_OUTPUT_STATE_DEFAULT);
444
445 if (irq)
446 return irq;
447
448 ASSERT_CRITICAL(false)do { if (({ int __ret = !!(!(0)); if (__ret) printf("WARNING %s failed at %s:%d\n"
, "!(0)", "/usr/src/sys/dev/pci/drm/amd/display/dc/gpio/gpio_service.c"
, 448); __builtin_expect(!!(__ret), 0); })) do {} while (0); }
while (0);
449 return NULL((void *)0);
450}
451
452void dal_gpio_destroy_irq(
453 struct gpio **irq)
454{
455 if (!irq || !*irq) {
456 ASSERT_CRITICAL(false)do { if (({ int __ret = !!(!(0)); if (__ret) printf("WARNING %s failed at %s:%d\n"
, "!(0)", "/usr/src/sys/dev/pci/drm/amd/display/dc/gpio/gpio_service.c"
, 456); __builtin_expect(!!(__ret), 0); })) do {} while (0); }
while (0);
457 return;
458 }
459
460 dal_gpio_destroy(irq);
461 kfree(*irq);
462
463 *irq = NULL((void *)0);
464}
465
466struct ddc *dal_gpio_create_ddc(
467 struct gpio_service *service,
468 uint32_t offset,
469 uint32_t mask,
470 struct gpio_ddc_hw_info *info)
471{
472 enum gpio_id id;
473 uint32_t en;
474 struct ddc *ddc;
475
476 if (!service->translate.funcs->offset_to_id(offset, mask, &id, &en))
477 return NULL((void *)0);
478
479 ddc = kzalloc(sizeof(struct ddc), GFP_KERNEL(0x0001 | 0x0004));
480
481 if (!ddc) {
482 BREAK_TO_DEBUGGER()do { ___drm_dbg(((void *)0), DRM_UT_DRIVER, "%s():%d\n", __func__
, 482); do {} while (0); } while (0);
483 return NULL((void *)0);
484 }
485
486 ddc->pin_data = dal_gpio_create(
487 service, GPIO_ID_DDC_DATA, en, GPIO_PIN_OUTPUT_STATE_DEFAULT);
488
489 if (!ddc->pin_data) {
490 BREAK_TO_DEBUGGER()do { ___drm_dbg(((void *)0), DRM_UT_DRIVER, "%s():%d\n", __func__
, 490); do {} while (0); } while (0);
491 goto failure_1;
492 }
493
494 ddc->pin_clock = dal_gpio_create(
495 service, GPIO_ID_DDC_CLOCK, en, GPIO_PIN_OUTPUT_STATE_DEFAULT);
496
497 if (!ddc->pin_clock) {
498 BREAK_TO_DEBUGGER()do { ___drm_dbg(((void *)0), DRM_UT_DRIVER, "%s():%d\n", __func__
, 498); do {} while (0); } while (0);
499 goto failure_2;
500 }
501
502 ddc->hw_info = *info;
503
504 ddc->ctx = service->ctx;
505
506 return ddc;
507
508failure_2:
509 dal_gpio_destroy(&ddc->pin_data);
510
511failure_1:
512 kfree(ddc);
513
514 return NULL((void *)0);
515}
516
517void dal_gpio_destroy_ddc(
518 struct ddc **ddc)
519{
520 if (!ddc || !*ddc) {
521 BREAK_TO_DEBUGGER()do { ___drm_dbg(((void *)0), DRM_UT_DRIVER, "%s():%d\n", __func__
, 521); do {} while (0); } while (0);
522 return;
523 }
524
525 dal_ddc_close(*ddc);
526 dal_gpio_destroy(&(*ddc)->pin_data);
527 dal_gpio_destroy(&(*ddc)->pin_clock);
528 kfree(*ddc);
529
530 *ddc = NULL((void *)0);
531}
532
533enum gpio_result dal_ddc_open(
534 struct ddc *ddc,
535 enum gpio_mode mode,
536 enum gpio_ddc_config_type config_type)
537{
538 enum gpio_result result;
539
540 struct gpio_config_data config_data;
541 struct hw_gpio *hw_data;
542 struct hw_gpio *hw_clock;
543
544 result = dal_gpio_open_ex(ddc->pin_data, mode);
545
546 if (result != GPIO_RESULT_OK) {
547 BREAK_TO_DEBUGGER()do { ___drm_dbg(((void *)0), DRM_UT_DRIVER, "%s():%d\n", __func__
, 547); do {} while (0); } while (0);
548 return result;
549 }
550
551 result = dal_gpio_open_ex(ddc->pin_clock, mode);
552
553 if (result != GPIO_RESULT_OK) {
554 BREAK_TO_DEBUGGER()do { ___drm_dbg(((void *)0), DRM_UT_DRIVER, "%s():%d\n", __func__
, 554); do {} while (0); } while (0);
555 goto failure;
556 }
557
558 /* DDC clock and data pins should belong
559 * to the same DDC block id,
560 * we use the data pin to set the pad mode. */
561
562 if (mode == GPIO_MODE_INPUT)
563 /* this is from detect_sink_type,
564 * we need extra delay there */
565 config_data.type = GPIO_CONFIG_TYPE_I2C_AUX_DUAL_MODE;
566 else
567 config_data.type = GPIO_CONFIG_TYPE_DDC;
568
569 config_data.config.ddc.type = config_type;
570
571 hw_data = FROM_HW_GPIO_PIN(ddc->pin_data->pin)({ const __typeof( ((struct hw_gpio *)0)->base ) *__mptr =
((ddc->pin_data->pin)); (struct hw_gpio *)( (char *)__mptr
- __builtin_offsetof(struct hw_gpio, base) );});
572 hw_clock = FROM_HW_GPIO_PIN(ddc->pin_clock->pin)({ const __typeof( ((struct hw_gpio *)0)->base ) *__mptr =
((ddc->pin_clock->pin)); (struct hw_gpio *)( (char *)__mptr
- __builtin_offsetof(struct hw_gpio, base) );});
573
574 config_data.config.ddc.data_en_bit_present = hw_data->store.en != 0;
575 config_data.config.ddc.clock_en_bit_present = hw_clock->store.en != 0;
576
577 result = dal_gpio_set_config(ddc->pin_data, &config_data);
578
579 if (result == GPIO_RESULT_OK)
580 return result;
581
582 BREAK_TO_DEBUGGER()do { ___drm_dbg(((void *)0), DRM_UT_DRIVER, "%s():%d\n", __func__
, 582); do {} while (0); } while (0);
583
584 dal_gpio_close(ddc->pin_clock);
585
586failure:
587 dal_gpio_close(ddc->pin_data);
588
589 return result;
590}
591
592enum gpio_result dal_ddc_change_mode(
593 struct ddc *ddc,
594 enum gpio_mode mode)
595{
596 enum gpio_result result;
597
598 enum gpio_mode original_mode =
599 dal_gpio_get_mode(ddc->pin_data);
600
601 result = dal_gpio_change_mode(ddc->pin_data, mode);
602
603 /* [anaumov] DAL2 code returns GPIO_RESULT_NON_SPECIFIC_ERROR
604 * in case of failures;
605 * set_mode() is so that, in case of failure,
606 * we must explicitly set original mode */
607
608 if (result != GPIO_RESULT_OK)
609 goto failure;
610
611 result = dal_gpio_change_mode(ddc->pin_clock, mode);
612
613 if (result == GPIO_RESULT_OK)
614 return result;
615
616 dal_gpio_change_mode(ddc->pin_clock, original_mode);
617
618failure:
619 dal_gpio_change_mode(ddc->pin_data, original_mode);
620
621 return result;
622}
623
624enum gpio_ddc_line dal_ddc_get_line(
625 const struct ddc *ddc)
626{
627 return (enum gpio_ddc_line)dal_gpio_get_enum(ddc->pin_data);
628}
629
630enum gpio_result dal_ddc_set_config(
631 struct ddc *ddc,
632 enum gpio_ddc_config_type config_type)
633{
634 struct gpio_config_data config_data;
635
636 config_data.type = GPIO_CONFIG_TYPE_DDC;
637
638 config_data.config.ddc.type = config_type;
639 config_data.config.ddc.data_en_bit_present = false0;
640 config_data.config.ddc.clock_en_bit_present = false0;
641
642 return dal_gpio_set_config(ddc->pin_data, &config_data);
643}
644
645void dal_ddc_close(
646 struct ddc *ddc)
647{
648 if (ddc != NULL((void *)0)) {
649 dal_gpio_close(ddc->pin_clock);
650 dal_gpio_close(ddc->pin_data);
651 }
652}
653