Bug Summary

File:dev/pci/drm/amd/display/dc/gpio/gpio_service.c
Warning:line 439, column 3
Value stored to 'id' is never read

Annotated Source Code

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clang -cc1 -cc1 -triple amd64-unknown-openbsd7.0 -analyze -disable-free -disable-llvm-verifier -discard-value-names -main-file-name gpio_service.c -analyzer-store=region -analyzer-opt-analyze-nested-blocks -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 -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 -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/lib/clang/13.0.0 -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/swsmu -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/powerplay -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/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 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 -D CONFIG_DRM_AMD_DC_DCN3_0 -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 -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 /usr/obj/sys/arch/amd64/compile/GENERIC.MP/scan-build/2022-01-12-131800-47421-1 -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 <linux/slab.h>
31
32#include "dm_services.h"
33#include "include/gpio_interface.h"
34#include "include/gpio_service_interface.h"
35#include "hw_translate.h"
36#include "hw_factory.h"
37
38/*
39 * Header of this unit
40 */
41
42#include "gpio_service.h"
43
44/*
45 * Post-requisites: headers required by this unit
46 */
47
48#include "hw_gpio.h"
49
50/*
51 * @brief
52 * Public API.
53 */
54
55struct gpio_service *dal_gpio_service_create(
56 enum dce_version dce_version_major,
57 enum dce_version dce_version_minor,
58 struct dc_context *ctx)
59{
60 struct gpio_service *service;
61 uint32_t index_of_id;
62
63 service = kzalloc(sizeof(struct gpio_service), GFP_KERNEL(0x0001 | 0x0004));
64
65 if (!service) {
66 BREAK_TO_DEBUGGER()do { __drm_dbg(DRM_UT_DRIVER, "%s():%d\n", __func__, 66); do {
} while (0); } while (0);
67 return NULL((void *)0);
68 }
69
70 if (!dal_hw_translate_init(&service->translate, dce_version_major,
71 dce_version_minor)) {
72 BREAK_TO_DEBUGGER()do { __drm_dbg(DRM_UT_DRIVER, "%s():%d\n", __func__, 72); do {
} while (0); } while (0);
73 goto failure_1;
74 }
75
76 if (!dal_hw_factory_init(&service->factory, dce_version_major,
77 dce_version_minor)) {
78 BREAK_TO_DEBUGGER()do { __drm_dbg(DRM_UT_DRIVER, "%s():%d\n", __func__, 78); do {
} while (0); } while (0);
79 goto failure_1;
80 }
81
82 /* allocate and initialize busyness storage */
83 {
84 index_of_id = 0;
85 service->ctx = ctx;
86
87 do {
88 uint32_t number_of_bits =
89 service->factory.number_of_pins[index_of_id];
90 uint32_t i = 0;
91
92 if (number_of_bits) {
93 service->busyness[index_of_id] =
94 kcalloc(number_of_bits, sizeof(char),
95 GFP_KERNEL(0x0001 | 0x0004));
96
97 if (!service->busyness[index_of_id]) {
98 BREAK_TO_DEBUGGER()do { __drm_dbg(DRM_UT_DRIVER, "%s():%d\n", __func__, 98); do {
} while (0); } while (0);
99 goto failure_2;
100 }
101
102 do {
103 service->busyness[index_of_id][i] = 0;
104 ++i;
105 } while (i < number_of_bits);
106 } else {
107 service->busyness[index_of_id] = NULL((void *)0);
108 }
109
110 ++index_of_id;
111 } while (index_of_id < GPIO_ID_COUNT);
112 }
113
114 return service;
115
116failure_2:
117 while (index_of_id) {
118 --index_of_id;
119 kfree(service->busyness[index_of_id]);
120 }
121
122failure_1:
123 kfree(service);
124
125 return NULL((void *)0);
126}
127
128struct gpio *dal_gpio_service_create_irq(
129 struct gpio_service *service,
130 uint32_t offset,
131 uint32_t mask)
132{
133 enum gpio_id id;
134 uint32_t en;
135
136 if (!service->translate.funcs->offset_to_id(offset, mask, &id, &en)) {
137 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"
, 137); __builtin_expect(!!(__ret), 0); })) do {} while (0); }
while (0);
138 return NULL((void *)0);
139 }
140
141 return dal_gpio_create_irq(service, id, en);
142}
143
144struct gpio *dal_gpio_service_create_generic_mux(
145 struct gpio_service *service,
146 uint32_t offset,
147 uint32_t mask)
148{
149 enum gpio_id id;
150 uint32_t en;
151 struct gpio *generic;
152
153 if (!service->translate.funcs->offset_to_id(offset, mask, &id, &en)) {
154 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"
, 154); __builtin_expect(!!(__ret), 0); })) do {} while (0); }
while (0);
155 return NULL((void *)0);
156 }
157
158 generic = dal_gpio_create(
159 service, id, en, GPIO_PIN_OUTPUT_STATE_DEFAULT);
160
161 return generic;
162}
163
164void dal_gpio_destroy_generic_mux(
165 struct gpio **mux)
166{
167 if (!mux || !*mux) {
168 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"
, 168); __builtin_expect(!!(__ret), 0); })) do {} while (0); }
while (0);
169 return;
170 }
171
172 dal_gpio_destroy(mux);
173 kfree(*mux);
174
175 *mux = NULL((void *)0);
176}
177
178struct gpio_pin_info dal_gpio_get_generic_pin_info(
179 struct gpio_service *service,
180 enum gpio_id id,
181 uint32_t en)
182{
183 struct gpio_pin_info pin;
184
185 if (service->translate.funcs->id_to_offset) {
186 service->translate.funcs->id_to_offset(id, en, &pin);
187 } else {
188 pin.mask = 0xFFFFFFFF;
189 pin.offset = 0xFFFFFFFF;
190 }
191
192 return pin;
193}
194
195void dal_gpio_service_destroy(
196 struct gpio_service **ptr)
197{
198 if (!ptr || !*ptr) {
199 BREAK_TO_DEBUGGER()do { __drm_dbg(DRM_UT_DRIVER, "%s():%d\n", __func__, 199); do
{} while (0); } while (0);
200 return;
201 }
202
203 /* free business storage */
204 {
205 uint32_t index_of_id = 0;
206
207 do {
208 kfree((*ptr)->busyness[index_of_id]);
209
210 ++index_of_id;
211 } while (index_of_id < GPIO_ID_COUNT);
212 }
213
214 kfree(*ptr);
215
216 *ptr = NULL((void *)0);
217}
218
219enum gpio_result dal_mux_setup_config(
220 struct gpio *mux,
221 struct gpio_generic_mux_config *config)
222{
223 struct gpio_config_data config_data;
224
225 if (!config)
226 return GPIO_RESULT_INVALID_DATA;
227
228 config_data.config.generic_mux = *config;
229 config_data.type = GPIO_CONFIG_TYPE_GENERIC_MUX;
230
231 return dal_gpio_set_config(mux, &config_data);
232}
233
234/*
235 * @brief
236 * Private API.
237 */
238
239static bool_Bool is_pin_busy(
240 const struct gpio_service *service,
241 enum gpio_id id,
242 uint32_t en)
243{
244 return service->busyness[id][en];
245}
246
247static void set_pin_busy(
248 struct gpio_service *service,
249 enum gpio_id id,
250 uint32_t en)
251{
252 service->busyness[id][en] = true1;
253}
254
255static void set_pin_free(
256 struct gpio_service *service,
257 enum gpio_id id,
258 uint32_t en)
259{
260 service->busyness[id][en] = false0;
261}
262
263enum gpio_result dal_gpio_service_lock(
264 struct gpio_service *service,
265 enum gpio_id id,
266 uint32_t en)
267{
268 if (!service->busyness[id]) {
269 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"
, 269); __builtin_expect(!!(__ret), 0); })) do {} while (0); }
while (0);
270 return GPIO_RESULT_OPEN_FAILED;
271 }
272
273 set_pin_busy(service, id, en);
274 return GPIO_RESULT_OK;
275}
276
277enum gpio_result dal_gpio_service_unlock(
278 struct gpio_service *service,
279 enum gpio_id id,
280 uint32_t en)
281{
282 if (!service->busyness[id]) {
283 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"
, 283); __builtin_expect(!!(__ret), 0); })) do {} while (0); }
while (0);
284 return GPIO_RESULT_OPEN_FAILED;
285 }
286
287 set_pin_free(service, id, en);
288 return GPIO_RESULT_OK;
289}
290
291enum gpio_result dal_gpio_service_open(
292 struct gpio *gpio)
293{
294 struct gpio_service *service = gpio->service;
295 enum gpio_id id = gpio->id;
296 uint32_t en = gpio->en;
297 enum gpio_mode mode = gpio->mode;
298
299 struct hw_gpio_pin **pin = &gpio->pin;
300
301
302 if (!service->busyness[id]) {
303 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"
, 303); __builtin_expect(!!(__ret), 0); })) do {} while (0); }
while (0);
304 return GPIO_RESULT_OPEN_FAILED;
305 }
306
307 if (is_pin_busy(service, id, en)) {
308 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"
, 308); __builtin_expect(!!(__ret), 0); })) do {} while (0); }
while (0);
309 return GPIO_RESULT_DEVICE_BUSY;
310 }
311
312 switch (id) {
313 case GPIO_ID_DDC_DATA:
314 *pin = service->factory.funcs->get_ddc_pin(gpio);
315 service->factory.funcs->define_ddc_registers(*pin, en);
316 break;
317 case GPIO_ID_DDC_CLOCK:
318 *pin = service->factory.funcs->get_ddc_pin(gpio);
319 service->factory.funcs->define_ddc_registers(*pin, en);
320 break;
321 case GPIO_ID_GENERIC:
322 *pin = service->factory.funcs->get_generic_pin(gpio);
323 service->factory.funcs->define_generic_registers(*pin, en);
324 break;
325 case GPIO_ID_HPD:
326 *pin = service->factory.funcs->get_hpd_pin(gpio);
327 service->factory.funcs->define_hpd_registers(*pin, en);
328 break;
329
330 //TODO: gsl and sync support? create_sync and create_gsl are NULL
331 case GPIO_ID_SYNC:
332 case GPIO_ID_GSL:
333 break;
334 default:
335 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"
, 335); __builtin_expect(!!(__ret), 0); })) do {} while (0); }
while (0);
336 return GPIO_RESULT_NON_SPECIFIC_ERROR;
337 }
338
339 if (!*pin) {
340 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"
, 340); __builtin_expect(!!(__ret), 0); })) do {} while (0); }
while (0);
341 return GPIO_RESULT_NON_SPECIFIC_ERROR;
342 }
343
344 if (!(*pin)->funcs->open(*pin, mode)) {
345 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"
, 345); __builtin_expect(!!(__ret), 0); })) do {} while (0); }
while (0);
346 dal_gpio_service_close(service, pin);
347 return GPIO_RESULT_OPEN_FAILED;
348 }
349
350 set_pin_busy(service, id, en);
351 return GPIO_RESULT_OK;
352}
353
354void dal_gpio_service_close(
355 struct gpio_service *service,
356 struct hw_gpio_pin **ptr)
357{
358 struct hw_gpio_pin *pin;
359
360 if (!ptr) {
361 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"
, 361); __builtin_expect(!!(__ret), 0); })) do {} while (0); }
while (0);
362 return;
363 }
364
365 pin = *ptr;
366
367 if (pin) {
368 set_pin_free(service, pin->id, pin->en);
369
370 pin->funcs->close(pin);
371
372 *ptr = NULL((void *)0);
373 }
374}
375
376enum dc_irq_source dal_irq_get_source(
377 const struct gpio *irq)
378{
379 enum gpio_id id = dal_gpio_get_id(irq);
380
381 switch (id) {
382 case GPIO_ID_HPD:
383 return (enum dc_irq_source)(DC_IRQ_SOURCE_HPD1 +
384 dal_gpio_get_enum(irq));
385 case GPIO_ID_GPIO_PAD:
386 return (enum dc_irq_source)(DC_IRQ_SOURCE_GPIOPAD0 +
387 dal_gpio_get_enum(irq));
388 default:
389 return DC_IRQ_SOURCE_INVALID;
390 }
391}
392
393enum dc_irq_source dal_irq_get_rx_source(
394 const struct gpio *irq)
395{
396 enum gpio_id id = dal_gpio_get_id(irq);
397
398 switch (id) {
399 case GPIO_ID_HPD:
400 return (enum dc_irq_source)(DC_IRQ_SOURCE_HPD1RX +
401 dal_gpio_get_enum(irq));
402 default:
403 return DC_IRQ_SOURCE_INVALID;
404 }
405}
406
407enum gpio_result dal_irq_setup_hpd_filter(
408 struct gpio *irq,
409 struct gpio_hpd_config *config)
410{
411 struct gpio_config_data config_data;
412
413 if (!config)
414 return GPIO_RESULT_INVALID_DATA;
415
416 config_data.type = GPIO_CONFIG_TYPE_HPD;
417 config_data.config.hpd = *config;
418
419 return dal_gpio_set_config(irq, &config_data);
420}
421
422/*
423 * @brief
424 * Creation and destruction
425 */
426
427struct gpio *dal_gpio_create_irq(
428 struct gpio_service *service,
429 enum gpio_id id,
430 uint32_t en)
431{
432 struct gpio *irq;
433
434 switch (id) {
435 case GPIO_ID_HPD:
436 case GPIO_ID_GPIO_PAD:
437 break;
438 default:
439 id = GPIO_ID_HPD;
Value stored to 'id' is never read
440 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"
, 440); __builtin_expect(!!(__ret), 0); })) do {} while (0); }
while (0);
441 return NULL((void *)0);
442 }
443
444 irq = dal_gpio_create(
445 service, id, en, GPIO_PIN_OUTPUT_STATE_DEFAULT);
446
447 if (irq)
448 return irq;
449
450 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"
, 450); __builtin_expect(!!(__ret), 0); })) do {} while (0); }
while (0);
451 return NULL((void *)0);
452}
453
454void dal_gpio_destroy_irq(
455 struct gpio **irq)
456{
457 if (!irq || !*irq) {
458 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"
, 458); __builtin_expect(!!(__ret), 0); })) do {} while (0); }
while (0);
459 return;
460 }
461
462 dal_gpio_destroy(irq);
463 kfree(*irq);
464
465 *irq = NULL((void *)0);
466}
467
468struct ddc *dal_gpio_create_ddc(
469 struct gpio_service *service,
470 uint32_t offset,
471 uint32_t mask,
472 struct gpio_ddc_hw_info *info)
473{
474 enum gpio_id id;
475 uint32_t en;
476 struct ddc *ddc;
477
478 if (!service->translate.funcs->offset_to_id(offset, mask, &id, &en))
479 return NULL((void *)0);
480
481 ddc = kzalloc(sizeof(struct ddc), GFP_KERNEL(0x0001 | 0x0004));
482
483 if (!ddc) {
484 BREAK_TO_DEBUGGER()do { __drm_dbg(DRM_UT_DRIVER, "%s():%d\n", __func__, 484); do
{} while (0); } while (0);
485 return NULL((void *)0);
486 }
487
488 ddc->pin_data = dal_gpio_create(
489 service, GPIO_ID_DDC_DATA, en, GPIO_PIN_OUTPUT_STATE_DEFAULT);
490
491 if (!ddc->pin_data) {
492 BREAK_TO_DEBUGGER()do { __drm_dbg(DRM_UT_DRIVER, "%s():%d\n", __func__, 492); do
{} while (0); } while (0);
493 goto failure_1;
494 }
495
496 ddc->pin_clock = dal_gpio_create(
497 service, GPIO_ID_DDC_CLOCK, en, GPIO_PIN_OUTPUT_STATE_DEFAULT);
498
499 if (!ddc->pin_clock) {
500 BREAK_TO_DEBUGGER()do { __drm_dbg(DRM_UT_DRIVER, "%s():%d\n", __func__, 500); do
{} while (0); } while (0);
501 goto failure_2;
502 }
503
504 ddc->hw_info = *info;
505
506 ddc->ctx = service->ctx;
507
508 return ddc;
509
510failure_2:
511 dal_gpio_destroy(&ddc->pin_data);
512
513failure_1:
514 kfree(ddc);
515
516 return NULL((void *)0);
517}
518
519void dal_gpio_destroy_ddc(
520 struct ddc **ddc)
521{
522 if (!ddc || !*ddc) {
523 BREAK_TO_DEBUGGER()do { __drm_dbg(DRM_UT_DRIVER, "%s():%d\n", __func__, 523); do
{} while (0); } while (0);
524 return;
525 }
526
527 dal_ddc_close(*ddc);
528 dal_gpio_destroy(&(*ddc)->pin_data);
529 dal_gpio_destroy(&(*ddc)->pin_clock);
530 kfree(*ddc);
531
532 *ddc = NULL((void *)0);
533}
534
535enum gpio_result dal_ddc_open(
536 struct ddc *ddc,
537 enum gpio_mode mode,
538 enum gpio_ddc_config_type config_type)
539{
540 enum gpio_result result;
541
542 struct gpio_config_data config_data;
543 struct hw_gpio *hw_data;
544 struct hw_gpio *hw_clock;
545
546 result = dal_gpio_open_ex(ddc->pin_data, mode);
547
548 if (result != GPIO_RESULT_OK) {
549 BREAK_TO_DEBUGGER()do { __drm_dbg(DRM_UT_DRIVER, "%s():%d\n", __func__, 549); do
{} while (0); } while (0);
550 return result;
551 }
552
553 result = dal_gpio_open_ex(ddc->pin_clock, mode);
554
555 if (result != GPIO_RESULT_OK) {
556 BREAK_TO_DEBUGGER()do { __drm_dbg(DRM_UT_DRIVER, "%s():%d\n", __func__, 556); do
{} while (0); } while (0);
557 goto failure;
558 }
559
560 /* DDC clock and data pins should belong
561 * to the same DDC block id,
562 * we use the data pin to set the pad mode. */
563
564 if (mode == GPIO_MODE_INPUT)
565 /* this is from detect_sink_type,
566 * we need extra delay there */
567 config_data.type = GPIO_CONFIG_TYPE_I2C_AUX_DUAL_MODE;
568 else
569 config_data.type = GPIO_CONFIG_TYPE_DDC;
570
571 config_data.config.ddc.type = config_type;
572
573 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) );});
574 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) );});
575
576 config_data.config.ddc.data_en_bit_present = hw_data->store.en != 0;
577 config_data.config.ddc.clock_en_bit_present = hw_clock->store.en != 0;
578
579 result = dal_gpio_set_config(ddc->pin_data, &config_data);
580
581 if (result == GPIO_RESULT_OK)
582 return result;
583
584 BREAK_TO_DEBUGGER()do { __drm_dbg(DRM_UT_DRIVER, "%s():%d\n", __func__, 584); do
{} while (0); } while (0);
585
586 dal_gpio_close(ddc->pin_clock);
587
588failure:
589 dal_gpio_close(ddc->pin_data);
590
591 return result;
592}
593
594enum gpio_result dal_ddc_change_mode(
595 struct ddc *ddc,
596 enum gpio_mode mode)
597{
598 enum gpio_result result;
599
600 enum gpio_mode original_mode =
601 dal_gpio_get_mode(ddc->pin_data);
602
603 result = dal_gpio_change_mode(ddc->pin_data, mode);
604
605 /* [anaumov] DAL2 code returns GPIO_RESULT_NON_SPECIFIC_ERROR
606 * in case of failures;
607 * set_mode() is so that, in case of failure,
608 * we must explicitly set original mode */
609
610 if (result != GPIO_RESULT_OK)
611 goto failure;
612
613 result = dal_gpio_change_mode(ddc->pin_clock, mode);
614
615 if (result == GPIO_RESULT_OK)
616 return result;
617
618 dal_gpio_change_mode(ddc->pin_clock, original_mode);
619
620failure:
621 dal_gpio_change_mode(ddc->pin_data, original_mode);
622
623 return result;
624}
625
626enum gpio_ddc_line dal_ddc_get_line(
627 const struct ddc *ddc)
628{
629 return (enum gpio_ddc_line)dal_gpio_get_enum(ddc->pin_data);
630}
631
632enum gpio_result dal_ddc_set_config(
633 struct ddc *ddc,
634 enum gpio_ddc_config_type config_type)
635{
636 struct gpio_config_data config_data;
637
638 config_data.type = GPIO_CONFIG_TYPE_DDC;
639
640 config_data.config.ddc.type = config_type;
641 config_data.config.ddc.data_en_bit_present = false0;
642 config_data.config.ddc.clock_en_bit_present = false0;
643
644 return dal_gpio_set_config(ddc->pin_data, &config_data);
645}
646
647void dal_ddc_close(
648 struct ddc *ddc)
649{
650 dal_gpio_close(ddc->pin_clock);
651 dal_gpio_close(ddc->pin_data);
652}
653