1/*
2 * Copyright 2020 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#include "../dmub_srv.h"
27#include "dmub_reg.h"
28#include "dmub_dcn31.h"
29
30#include "yellow_carp_offset.h"
31#include "dcn/dcn_3_1_2_offset.h"
32#include "dcn/dcn_3_1_2_sh_mask.h"
33
34#define BASE_INNER(seg) DCN_BASE__INST0_SEG##seg
35#define CTX dmub
36#define REGS dmub->regs_dcn31
37#define REG_OFFSET_EXP(reg_name) (BASE(reg##reg_name##_BASE_IDX) + reg##reg_name)
38
39const struct dmub_srv_dcn31_regs dmub_srv_dcn31_regs = {
40#define DMUB_SR(reg) REG_OFFSET_EXP(reg),
41 {
42 DMUB_DCN31_REGS()
43 DMCUB_INTERNAL_REGS()
44 },
45#undef DMUB_SR
46
47#define DMUB_SF(reg, field) FD_MASK(reg, field),
48 { DMUB_DCN31_FIELDS() },
49#undef DMUB_SF
50
51#define DMUB_SF(reg, field) FD_SHIFT(reg, field),
52 { DMUB_DCN31_FIELDS() },
53#undef DMUB_SF
54};
55
56static void dmub_dcn31_get_fb_base_offset(struct dmub_srv *dmub,
57 uint64_t *fb_base,
58 uint64_t *fb_offset)
59{
60 uint32_t tmp;
61
62 if (dmub->fb_base || dmub->fb_offset) {
63 *fb_base = dmub->fb_base;
64 *fb_offset = dmub->fb_offset;
65 return;
66 }
67
68 REG_GET(DCN_VM_FB_LOCATION_BASE, FB_BASE, &tmp);
69 *fb_base = (uint64_t)tmp << 24;
70
71 REG_GET(DCN_VM_FB_OFFSET, FB_OFFSET, &tmp);
72 *fb_offset = (uint64_t)tmp << 24;
73}
74
75static inline void dmub_dcn31_translate_addr(const union dmub_addr *addr_in,
76 uint64_t fb_base,
77 uint64_t fb_offset,
78 union dmub_addr *addr_out)
79{
80 addr_out->quad_part = addr_in->quad_part - fb_base + fb_offset;
81}
82
83void dmub_dcn31_reset(struct dmub_srv *dmub)
84{
85 union dmub_gpint_data_register cmd;
86 const uint32_t timeout = 100000;
87 uint32_t in_reset, is_enabled, scratch, i, pwait_mode;
88
89 REG_GET(DMCUB_CNTL2, DMCUB_SOFT_RESET, &in_reset);
90
91 if (in_reset == 0) {
92 cmd.bits.status = 1;
93 cmd.bits.command_code = DMUB_GPINT__STOP_FW;
94 cmd.bits.param = 0;
95
96 dmub->hw_funcs.set_gpint(dmub, cmd);
97
98 /**
99 * Timeout covers both the ACK and the wait
100 * for remaining work to finish.
101 */
102
103 for (i = 0; i < timeout; ++i) {
104 if (dmub->hw_funcs.is_gpint_acked(dmub, cmd))
105 break;
106
107 udelay(usec: 1);
108 }
109
110 for (i = 0; i < timeout; ++i) {
111 scratch = REG_READ(DMCUB_SCRATCH7);
112 if (scratch == DMUB_GPINT__STOP_FW_RESPONSE)
113 break;
114
115 udelay(usec: 1);
116 }
117
118 for (i = 0; i < timeout; ++i) {
119 REG_GET(DMCUB_CNTL, DMCUB_PWAIT_MODE_STATUS, &pwait_mode);
120 if (pwait_mode & (1 << 0))
121 break;
122
123 udelay(usec: 1);
124 }
125 /* Force reset in case we timed out, DMCUB is likely hung. */
126 }
127
128 REG_GET(DMCUB_CNTL, DMCUB_ENABLE, &is_enabled);
129
130 if (is_enabled) {
131 REG_UPDATE(DMCUB_CNTL2, DMCUB_SOFT_RESET, 1);
132 REG_UPDATE(MMHUBBUB_SOFT_RESET, DMUIF_SOFT_RESET, 1);
133 REG_UPDATE(DMCUB_CNTL, DMCUB_ENABLE, 0);
134 }
135
136 REG_WRITE(DMCUB_INBOX1_RPTR, 0);
137 REG_WRITE(DMCUB_INBOX1_WPTR, 0);
138 REG_WRITE(DMCUB_OUTBOX1_RPTR, 0);
139 REG_WRITE(DMCUB_OUTBOX1_WPTR, 0);
140 REG_WRITE(DMCUB_OUTBOX0_RPTR, 0);
141 REG_WRITE(DMCUB_OUTBOX0_WPTR, 0);
142 REG_WRITE(DMCUB_SCRATCH0, 0);
143
144 /* Clear the GPINT command manually so we don't send anything during boot. */
145 cmd.all = 0;
146 dmub->hw_funcs.set_gpint(dmub, cmd);
147}
148
149void dmub_dcn31_reset_release(struct dmub_srv *dmub)
150{
151 REG_UPDATE(MMHUBBUB_SOFT_RESET, DMUIF_SOFT_RESET, 0);
152 REG_WRITE(DMCUB_SCRATCH15, dmub->psp_version & 0x001100FF);
153 REG_UPDATE_2(DMCUB_CNTL, DMCUB_ENABLE, 1, DMCUB_TRACEPORT_EN, 1);
154 REG_UPDATE(DMCUB_CNTL2, DMCUB_SOFT_RESET, 0);
155}
156
157void dmub_dcn31_backdoor_load(struct dmub_srv *dmub,
158 const struct dmub_window *cw0,
159 const struct dmub_window *cw1)
160{
161 union dmub_addr offset;
162 uint64_t fb_base, fb_offset;
163
164 dmub_dcn31_get_fb_base_offset(dmub, fb_base: &fb_base, fb_offset: &fb_offset);
165
166 REG_UPDATE(DMCUB_SEC_CNTL, DMCUB_SEC_RESET, 1);
167
168 dmub_dcn31_translate_addr(addr_in: &cw0->offset, fb_base, fb_offset, addr_out: &offset);
169
170 REG_WRITE(DMCUB_REGION3_CW0_OFFSET, offset.u.low_part);
171 REG_WRITE(DMCUB_REGION3_CW0_OFFSET_HIGH, offset.u.high_part);
172 REG_WRITE(DMCUB_REGION3_CW0_BASE_ADDRESS, cw0->region.base);
173 REG_SET_2(DMCUB_REGION3_CW0_TOP_ADDRESS, 0,
174 DMCUB_REGION3_CW0_TOP_ADDRESS, cw0->region.top,
175 DMCUB_REGION3_CW0_ENABLE, 1);
176
177 dmub_dcn31_translate_addr(addr_in: &cw1->offset, fb_base, fb_offset, addr_out: &offset);
178
179 REG_WRITE(DMCUB_REGION3_CW1_OFFSET, offset.u.low_part);
180 REG_WRITE(DMCUB_REGION3_CW1_OFFSET_HIGH, offset.u.high_part);
181 REG_WRITE(DMCUB_REGION3_CW1_BASE_ADDRESS, cw1->region.base);
182 REG_SET_2(DMCUB_REGION3_CW1_TOP_ADDRESS, 0,
183 DMCUB_REGION3_CW1_TOP_ADDRESS, cw1->region.top,
184 DMCUB_REGION3_CW1_ENABLE, 1);
185
186 REG_UPDATE_2(DMCUB_SEC_CNTL, DMCUB_SEC_RESET, 0, DMCUB_MEM_UNIT_ID,
187 0x20);
188}
189
190void dmub_dcn31_setup_windows(struct dmub_srv *dmub,
191 const struct dmub_window *cw2,
192 const struct dmub_window *cw3,
193 const struct dmub_window *cw4,
194 const struct dmub_window *cw5,
195 const struct dmub_window *cw6,
196 const struct dmub_window *region6)
197{
198 union dmub_addr offset;
199
200 offset = cw3->offset;
201
202 REG_WRITE(DMCUB_REGION3_CW3_OFFSET, offset.u.low_part);
203 REG_WRITE(DMCUB_REGION3_CW3_OFFSET_HIGH, offset.u.high_part);
204 REG_WRITE(DMCUB_REGION3_CW3_BASE_ADDRESS, cw3->region.base);
205 REG_SET_2(DMCUB_REGION3_CW3_TOP_ADDRESS, 0,
206 DMCUB_REGION3_CW3_TOP_ADDRESS, cw3->region.top,
207 DMCUB_REGION3_CW3_ENABLE, 1);
208
209 offset = cw4->offset;
210
211 REG_WRITE(DMCUB_REGION3_CW4_OFFSET, offset.u.low_part);
212 REG_WRITE(DMCUB_REGION3_CW4_OFFSET_HIGH, offset.u.high_part);
213 REG_WRITE(DMCUB_REGION3_CW4_BASE_ADDRESS, cw4->region.base);
214 REG_SET_2(DMCUB_REGION3_CW4_TOP_ADDRESS, 0,
215 DMCUB_REGION3_CW4_TOP_ADDRESS, cw4->region.top,
216 DMCUB_REGION3_CW4_ENABLE, 1);
217
218 offset = cw5->offset;
219
220 REG_WRITE(DMCUB_REGION3_CW5_OFFSET, offset.u.low_part);
221 REG_WRITE(DMCUB_REGION3_CW5_OFFSET_HIGH, offset.u.high_part);
222 REG_WRITE(DMCUB_REGION3_CW5_BASE_ADDRESS, cw5->region.base);
223 REG_SET_2(DMCUB_REGION3_CW5_TOP_ADDRESS, 0,
224 DMCUB_REGION3_CW5_TOP_ADDRESS, cw5->region.top,
225 DMCUB_REGION3_CW5_ENABLE, 1);
226
227 REG_WRITE(DMCUB_REGION5_OFFSET, offset.u.low_part);
228 REG_WRITE(DMCUB_REGION5_OFFSET_HIGH, offset.u.high_part);
229 REG_SET_2(DMCUB_REGION5_TOP_ADDRESS, 0,
230 DMCUB_REGION5_TOP_ADDRESS,
231 cw5->region.top - cw5->region.base - 1,
232 DMCUB_REGION5_ENABLE, 1);
233
234 offset = cw6->offset;
235
236 REG_WRITE(DMCUB_REGION3_CW6_OFFSET, offset.u.low_part);
237 REG_WRITE(DMCUB_REGION3_CW6_OFFSET_HIGH, offset.u.high_part);
238 REG_WRITE(DMCUB_REGION3_CW6_BASE_ADDRESS, cw6->region.base);
239 REG_SET_2(DMCUB_REGION3_CW6_TOP_ADDRESS, 0,
240 DMCUB_REGION3_CW6_TOP_ADDRESS, cw6->region.top,
241 DMCUB_REGION3_CW6_ENABLE, 1);
242}
243
244void dmub_dcn31_setup_mailbox(struct dmub_srv *dmub,
245 const struct dmub_region *inbox1)
246{
247 REG_WRITE(DMCUB_INBOX1_BASE_ADDRESS, inbox1->base);
248 REG_WRITE(DMCUB_INBOX1_SIZE, inbox1->top - inbox1->base);
249}
250
251uint32_t dmub_dcn31_get_inbox1_wptr(struct dmub_srv *dmub)
252{
253 return REG_READ(DMCUB_INBOX1_WPTR);
254}
255
256uint32_t dmub_dcn31_get_inbox1_rptr(struct dmub_srv *dmub)
257{
258 return REG_READ(DMCUB_INBOX1_RPTR);
259}
260
261void dmub_dcn31_set_inbox1_wptr(struct dmub_srv *dmub, uint32_t wptr_offset)
262{
263 REG_WRITE(DMCUB_INBOX1_WPTR, wptr_offset);
264}
265
266void dmub_dcn31_setup_out_mailbox(struct dmub_srv *dmub,
267 const struct dmub_region *outbox1)
268{
269 REG_WRITE(DMCUB_OUTBOX1_BASE_ADDRESS, outbox1->base);
270 REG_WRITE(DMCUB_OUTBOX1_SIZE, outbox1->top - outbox1->base);
271}
272
273uint32_t dmub_dcn31_get_outbox1_wptr(struct dmub_srv *dmub)
274{
275 /**
276 * outbox1 wptr register is accessed without locks (dal & dc)
277 * and to be called only by dmub_srv_stat_get_notification()
278 */
279 return REG_READ(DMCUB_OUTBOX1_WPTR);
280}
281
282void dmub_dcn31_set_outbox1_rptr(struct dmub_srv *dmub, uint32_t rptr_offset)
283{
284 /**
285 * outbox1 rptr register is accessed without locks (dal & dc)
286 * and to be called only by dmub_srv_stat_get_notification()
287 */
288 REG_WRITE(DMCUB_OUTBOX1_RPTR, rptr_offset);
289}
290
291bool dmub_dcn31_is_hw_init(struct dmub_srv *dmub)
292{
293 union dmub_fw_boot_status status;
294 uint32_t is_enable;
295
296 status.all = REG_READ(DMCUB_SCRATCH0);
297 REG_GET(DMCUB_CNTL, DMCUB_ENABLE, &is_enable);
298
299 return is_enable != 0 && status.bits.dal_fw;
300}
301
302bool dmub_dcn31_is_supported(struct dmub_srv *dmub)
303{
304 uint32_t supported = 0;
305
306 REG_GET(CC_DC_PIPE_DIS, DC_DMCUB_ENABLE, &supported);
307
308 return supported;
309}
310
311bool dmub_dcn31_is_psrsu_supported(struct dmub_srv *dmub)
312{
313 return dmub->fw_version >= DMUB_FW_VERSION(4, 0, 59);
314}
315
316void dmub_dcn31_set_gpint(struct dmub_srv *dmub,
317 union dmub_gpint_data_register reg)
318{
319 REG_WRITE(DMCUB_GPINT_DATAIN1, reg.all);
320}
321
322bool dmub_dcn31_is_gpint_acked(struct dmub_srv *dmub,
323 union dmub_gpint_data_register reg)
324{
325 union dmub_gpint_data_register test;
326
327 reg.bits.status = 0;
328 test.all = REG_READ(DMCUB_GPINT_DATAIN1);
329
330 return test.all == reg.all;
331}
332
333uint32_t dmub_dcn31_get_gpint_response(struct dmub_srv *dmub)
334{
335 return REG_READ(DMCUB_SCRATCH7);
336}
337
338uint32_t dmub_dcn31_get_gpint_dataout(struct dmub_srv *dmub)
339{
340 uint32_t dataout = REG_READ(DMCUB_GPINT_DATAOUT);
341
342 REG_UPDATE(DMCUB_INTERRUPT_ENABLE, DMCUB_GPINT_IH_INT_EN, 0);
343
344 REG_WRITE(DMCUB_GPINT_DATAOUT, 0);
345 REG_UPDATE(DMCUB_INTERRUPT_ACK, DMCUB_GPINT_IH_INT_ACK, 1);
346 REG_UPDATE(DMCUB_INTERRUPT_ACK, DMCUB_GPINT_IH_INT_ACK, 0);
347
348 REG_UPDATE(DMCUB_INTERRUPT_ENABLE, DMCUB_GPINT_IH_INT_EN, 1);
349
350 return dataout;
351}
352
353union dmub_fw_boot_status dmub_dcn31_get_fw_boot_status(struct dmub_srv *dmub)
354{
355 union dmub_fw_boot_status status;
356
357 status.all = REG_READ(DMCUB_SCRATCH0);
358 return status;
359}
360
361union dmub_fw_boot_options dmub_dcn31_get_fw_boot_option(struct dmub_srv *dmub)
362{
363 union dmub_fw_boot_options option;
364
365 option.all = REG_READ(DMCUB_SCRATCH14);
366 return option;
367}
368
369void dmub_dcn31_enable_dmub_boot_options(struct dmub_srv *dmub, const struct dmub_srv_hw_params *params)
370{
371 union dmub_fw_boot_options boot_options = {0};
372
373 boot_options.bits.z10_disable = params->disable_z10;
374 boot_options.bits.dpia_supported = params->dpia_supported;
375 boot_options.bits.enable_dpia = params->disable_dpia ? 0 : 1;
376 boot_options.bits.usb4_cm_version = params->usb4_cm_version;
377 boot_options.bits.dpia_hpd_int_enable_supported = params->dpia_hpd_int_enable_supported;
378 boot_options.bits.power_optimization = params->power_optimization;
379 boot_options.bits.lower_hbr3_phy_ssc = params->lower_hbr3_phy_ssc;
380 boot_options.bits.override_hbr3_pll_vco = params->override_hbr3_pll_vco;
381
382 boot_options.bits.sel_mux_phy_c_d_phy_f_g = (dmub->asic == DMUB_ASIC_DCN31B) ? 1 : 0;
383 boot_options.bits.disable_dpia_bw_allocation = params->disable_dpia_bw_allocation;
384
385 REG_WRITE(DMCUB_SCRATCH14, boot_options.all);
386}
387
388void dmub_dcn31_skip_dmub_panel_power_sequence(struct dmub_srv *dmub, bool skip)
389{
390 union dmub_fw_boot_options boot_options;
391 boot_options.all = REG_READ(DMCUB_SCRATCH14);
392 boot_options.bits.skip_phy_init_panel_sequence = skip;
393 REG_WRITE(DMCUB_SCRATCH14, boot_options.all);
394}
395
396void dmub_dcn31_setup_outbox0(struct dmub_srv *dmub,
397 const struct dmub_region *outbox0)
398{
399 REG_WRITE(DMCUB_OUTBOX0_BASE_ADDRESS, outbox0->base);
400
401 REG_WRITE(DMCUB_OUTBOX0_SIZE, outbox0->top - outbox0->base);
402}
403
404uint32_t dmub_dcn31_get_outbox0_wptr(struct dmub_srv *dmub)
405{
406 return REG_READ(DMCUB_OUTBOX0_WPTR);
407}
408
409void dmub_dcn31_set_outbox0_rptr(struct dmub_srv *dmub, uint32_t rptr_offset)
410{
411 REG_WRITE(DMCUB_OUTBOX0_RPTR, rptr_offset);
412}
413
414uint32_t dmub_dcn31_get_current_time(struct dmub_srv *dmub)
415{
416 return REG_READ(DMCUB_TIMER_CURRENT);
417}
418
419void dmub_dcn31_get_diagnostic_data(struct dmub_srv *dmub)
420{
421 uint32_t is_dmub_enabled, is_soft_reset, is_sec_reset, is_pwait;
422 uint32_t is_traceport_enabled, is_cw0_enabled, is_cw6_enabled;
423 struct dmub_timeout_info timeout = {0};
424
425 if (!dmub)
426 return;
427
428 /* timeout data filled externally, cache before resetting memory */
429 timeout = dmub->debug.timeout_info;
430 memset(&dmub->debug, 0, sizeof(dmub->debug));
431 dmub->debug.timeout_info = timeout;
432
433 dmub->debug.dmcub_version = dmub->fw_version;
434
435 dmub->debug.scratch[0] = REG_READ(DMCUB_SCRATCH0);
436 dmub->debug.scratch[1] = REG_READ(DMCUB_SCRATCH1);
437 dmub->debug.scratch[2] = REG_READ(DMCUB_SCRATCH2);
438 dmub->debug.scratch[3] = REG_READ(DMCUB_SCRATCH3);
439 dmub->debug.scratch[4] = REG_READ(DMCUB_SCRATCH4);
440 dmub->debug.scratch[5] = REG_READ(DMCUB_SCRATCH5);
441 dmub->debug.scratch[6] = REG_READ(DMCUB_SCRATCH6);
442 dmub->debug.scratch[7] = REG_READ(DMCUB_SCRATCH7);
443 dmub->debug.scratch[8] = REG_READ(DMCUB_SCRATCH8);
444 dmub->debug.scratch[9] = REG_READ(DMCUB_SCRATCH9);
445 dmub->debug.scratch[10] = REG_READ(DMCUB_SCRATCH10);
446 dmub->debug.scratch[11] = REG_READ(DMCUB_SCRATCH11);
447 dmub->debug.scratch[12] = REG_READ(DMCUB_SCRATCH12);
448 dmub->debug.scratch[13] = REG_READ(DMCUB_SCRATCH13);
449 dmub->debug.scratch[14] = REG_READ(DMCUB_SCRATCH14);
450 dmub->debug.scratch[15] = REG_READ(DMCUB_SCRATCH15);
451
452 dmub->debug.undefined_address_fault_addr = REG_READ(DMCUB_UNDEFINED_ADDRESS_FAULT_ADDR);
453 dmub->debug.inst_fetch_fault_addr = REG_READ(DMCUB_INST_FETCH_FAULT_ADDR);
454 dmub->debug.data_write_fault_addr = REG_READ(DMCUB_DATA_WRITE_FAULT_ADDR);
455
456 dmub->debug.inbox1_rptr = REG_READ(DMCUB_INBOX1_RPTR);
457 dmub->debug.inbox1_wptr = REG_READ(DMCUB_INBOX1_WPTR);
458 dmub->debug.inbox1_size = REG_READ(DMCUB_INBOX1_SIZE);
459
460 dmub->debug.inbox0_rptr = REG_READ(DMCUB_INBOX0_RPTR);
461 dmub->debug.inbox0_wptr = REG_READ(DMCUB_INBOX0_WPTR);
462 dmub->debug.inbox0_size = REG_READ(DMCUB_INBOX0_SIZE);
463
464 dmub->debug.outbox1_rptr = REG_READ(DMCUB_OUTBOX1_RPTR);
465 dmub->debug.outbox1_wptr = REG_READ(DMCUB_OUTBOX1_WPTR);
466 dmub->debug.outbox1_size = REG_READ(DMCUB_OUTBOX1_SIZE);
467
468 REG_GET(DMCUB_CNTL, DMCUB_ENABLE, &is_dmub_enabled);
469 dmub->debug.is_dmcub_enabled = is_dmub_enabled;
470
471 REG_GET(DMCUB_CNTL, DMCUB_PWAIT_MODE_STATUS, &is_pwait);
472 dmub->debug.is_pwait = is_pwait;
473
474 REG_GET(DMCUB_CNTL2, DMCUB_SOFT_RESET, &is_soft_reset);
475 dmub->debug.is_dmcub_soft_reset = is_soft_reset;
476
477 REG_GET(DMCUB_SEC_CNTL, DMCUB_SEC_RESET_STATUS, &is_sec_reset);
478 dmub->debug.is_dmcub_secure_reset = is_sec_reset;
479
480 REG_GET(DMCUB_CNTL, DMCUB_TRACEPORT_EN, &is_traceport_enabled);
481 dmub->debug.is_traceport_en = is_traceport_enabled;
482
483 REG_GET(DMCUB_REGION3_CW0_TOP_ADDRESS, DMCUB_REGION3_CW0_ENABLE, &is_cw0_enabled);
484 dmub->debug.is_cw0_enabled = is_cw0_enabled;
485
486 REG_GET(DMCUB_REGION3_CW6_TOP_ADDRESS, DMCUB_REGION3_CW6_ENABLE, &is_cw6_enabled);
487 dmub->debug.is_cw6_enabled = is_cw6_enabled;
488}
489
490bool dmub_dcn31_should_detect(struct dmub_srv *dmub)
491{
492 uint32_t fw_boot_status = REG_READ(DMCUB_SCRATCH0);
493 bool should_detect = (fw_boot_status & DMUB_FW_BOOT_STATUS_BIT_DETECTION_REQUIRED) != 0;
494 return should_detect;
495}
496
497

source code of linux/drivers/gpu/drm/amd/display/dmub/src/dmub_dcn31.c