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24#include <linux/pci.h>
25#include <linux/acpi.h>
26#include <linux/slab.h>
27#include <linux/power_supply.h>
28#include <acpi/video.h>
29#include <drm/drmP.h>
30#include <drm/drm_crtc_helper.h>
31#include "amdgpu.h"
32#include "amd_acpi.h"
33#include "atom.h"
34
35extern void amdgpu_pm_acpi_event_handler(struct amdgpu_device *adev);
36
37
38
39
40
41
42
43
44
45
46
47
48static union acpi_object *amdgpu_atif_call(acpi_handle handle, int function,
49 struct acpi_buffer *params)
50{
51 acpi_status status;
52 union acpi_object atif_arg_elements[2];
53 struct acpi_object_list atif_arg;
54 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
55
56 atif_arg.count = 2;
57 atif_arg.pointer = &atif_arg_elements[0];
58
59 atif_arg_elements[0].type = ACPI_TYPE_INTEGER;
60 atif_arg_elements[0].integer.value = function;
61
62 if (params) {
63 atif_arg_elements[1].type = ACPI_TYPE_BUFFER;
64 atif_arg_elements[1].buffer.length = params->length;
65 atif_arg_elements[1].buffer.pointer = params->pointer;
66 } else {
67
68 atif_arg_elements[1].type = ACPI_TYPE_INTEGER;
69 atif_arg_elements[1].integer.value = 0;
70 }
71
72 status = acpi_evaluate_object(handle, "ATIF", &atif_arg, &buffer);
73
74
75 if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) {
76 DRM_DEBUG_DRIVER("failed to evaluate ATIF got %s\n",
77 acpi_format_exception(status));
78 kfree(buffer.pointer);
79 return NULL;
80 }
81
82 return buffer.pointer;
83}
84
85
86
87
88
89
90
91
92
93
94
95static void amdgpu_atif_parse_notification(struct amdgpu_atif_notifications *n, u32 mask)
96{
97 n->display_switch = mask & ATIF_DISPLAY_SWITCH_REQUEST_SUPPORTED;
98 n->expansion_mode_change = mask & ATIF_EXPANSION_MODE_CHANGE_REQUEST_SUPPORTED;
99 n->thermal_state = mask & ATIF_THERMAL_STATE_CHANGE_REQUEST_SUPPORTED;
100 n->forced_power_state = mask & ATIF_FORCED_POWER_STATE_CHANGE_REQUEST_SUPPORTED;
101 n->system_power_state = mask & ATIF_SYSTEM_POWER_SOURCE_CHANGE_REQUEST_SUPPORTED;
102 n->display_conf_change = mask & ATIF_DISPLAY_CONF_CHANGE_REQUEST_SUPPORTED;
103 n->px_gfx_switch = mask & ATIF_PX_GFX_SWITCH_REQUEST_SUPPORTED;
104 n->brightness_change = mask & ATIF_PANEL_BRIGHTNESS_CHANGE_REQUEST_SUPPORTED;
105 n->dgpu_display_event = mask & ATIF_DGPU_DISPLAY_EVENT_SUPPORTED;
106}
107
108
109
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111
112
113
114
115
116
117
118static void amdgpu_atif_parse_functions(struct amdgpu_atif_functions *f, u32 mask)
119{
120 f->system_params = mask & ATIF_GET_SYSTEM_PARAMETERS_SUPPORTED;
121 f->sbios_requests = mask & ATIF_GET_SYSTEM_BIOS_REQUESTS_SUPPORTED;
122 f->select_active_disp = mask & ATIF_SELECT_ACTIVE_DISPLAYS_SUPPORTED;
123 f->lid_state = mask & ATIF_GET_LID_STATE_SUPPORTED;
124 f->get_tv_standard = mask & ATIF_GET_TV_STANDARD_FROM_CMOS_SUPPORTED;
125 f->set_tv_standard = mask & ATIF_SET_TV_STANDARD_IN_CMOS_SUPPORTED;
126 f->get_panel_expansion_mode = mask & ATIF_GET_PANEL_EXPANSION_MODE_FROM_CMOS_SUPPORTED;
127 f->set_panel_expansion_mode = mask & ATIF_SET_PANEL_EXPANSION_MODE_IN_CMOS_SUPPORTED;
128 f->temperature_change = mask & ATIF_TEMPERATURE_CHANGE_NOTIFICATION_SUPPORTED;
129 f->graphics_device_types = mask & ATIF_GET_GRAPHICS_DEVICE_TYPES_SUPPORTED;
130}
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141
142
143static int amdgpu_atif_verify_interface(acpi_handle handle,
144 struct amdgpu_atif *atif)
145{
146 union acpi_object *info;
147 struct atif_verify_interface output;
148 size_t size;
149 int err = 0;
150
151 info = amdgpu_atif_call(handle, ATIF_FUNCTION_VERIFY_INTERFACE, NULL);
152 if (!info)
153 return -EIO;
154
155 memset(&output, 0, sizeof(output));
156
157 size = *(u16 *) info->buffer.pointer;
158 if (size < 12) {
159 DRM_INFO("ATIF buffer is too small: %zu\n", size);
160 err = -EINVAL;
161 goto out;
162 }
163 size = min(sizeof(output), size);
164
165 memcpy(&output, info->buffer.pointer, size);
166
167
168 DRM_DEBUG_DRIVER("ATIF version %u\n", output.version);
169
170 amdgpu_atif_parse_notification(&atif->notifications, output.notification_mask);
171 amdgpu_atif_parse_functions(&atif->functions, output.function_bits);
172
173out:
174 kfree(info);
175 return err;
176}
177
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187
188
189
190static int amdgpu_atif_get_notification_params(acpi_handle handle,
191 struct amdgpu_atif_notification_cfg *n)
192{
193 union acpi_object *info;
194 struct atif_system_params params;
195 size_t size;
196 int err = 0;
197
198 info = amdgpu_atif_call(handle, ATIF_FUNCTION_GET_SYSTEM_PARAMETERS, NULL);
199 if (!info) {
200 err = -EIO;
201 goto out;
202 }
203
204 size = *(u16 *) info->buffer.pointer;
205 if (size < 10) {
206 err = -EINVAL;
207 goto out;
208 }
209
210 memset(¶ms, 0, sizeof(params));
211 size = min(sizeof(params), size);
212 memcpy(¶ms, info->buffer.pointer, size);
213
214 DRM_DEBUG_DRIVER("SYSTEM_PARAMS: mask = %#x, flags = %#x\n",
215 params.flags, params.valid_mask);
216 params.flags = params.flags & params.valid_mask;
217
218 if ((params.flags & ATIF_NOTIFY_MASK) == ATIF_NOTIFY_NONE) {
219 n->enabled = false;
220 n->command_code = 0;
221 } else if ((params.flags & ATIF_NOTIFY_MASK) == ATIF_NOTIFY_81) {
222 n->enabled = true;
223 n->command_code = 0x81;
224 } else {
225 if (size < 11) {
226 err = -EINVAL;
227 goto out;
228 }
229 n->enabled = true;
230 n->command_code = params.command_code;
231 }
232
233out:
234 DRM_DEBUG_DRIVER("Notification %s, command code = %#x\n",
235 (n->enabled ? "enabled" : "disabled"),
236 n->command_code);
237 kfree(info);
238 return err;
239}
240
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249
250
251
252static int amdgpu_atif_get_sbios_requests(acpi_handle handle,
253 struct atif_sbios_requests *req)
254{
255 union acpi_object *info;
256 size_t size;
257 int count = 0;
258
259 info = amdgpu_atif_call(handle, ATIF_FUNCTION_GET_SYSTEM_BIOS_REQUESTS, NULL);
260 if (!info)
261 return -EIO;
262
263 size = *(u16 *)info->buffer.pointer;
264 if (size < 0xd) {
265 count = -EINVAL;
266 goto out;
267 }
268 memset(req, 0, sizeof(*req));
269
270 size = min(sizeof(*req), size);
271 memcpy(req, info->buffer.pointer, size);
272 DRM_DEBUG_DRIVER("SBIOS pending requests: %#x\n", req->pending);
273
274 count = hweight32(req->pending);
275
276out:
277 kfree(info);
278 return count;
279}
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289
290
291int amdgpu_atif_handler(struct amdgpu_device *adev,
292 struct acpi_bus_event *event)
293{
294 struct amdgpu_atif *atif = &adev->atif;
295 struct atif_sbios_requests req;
296 acpi_handle handle;
297 int count;
298
299 DRM_DEBUG_DRIVER("event, device_class = %s, type = %#x\n",
300 event->device_class, event->type);
301
302 if (strcmp(event->device_class, ACPI_VIDEO_CLASS) != 0)
303 return NOTIFY_DONE;
304
305 if (!atif->notification_cfg.enabled ||
306 event->type != atif->notification_cfg.command_code)
307
308 return NOTIFY_DONE;
309
310
311 handle = ACPI_HANDLE(&adev->pdev->dev);
312 count = amdgpu_atif_get_sbios_requests(handle, &req);
313
314 if (count <= 0)
315 return NOTIFY_DONE;
316
317 DRM_DEBUG_DRIVER("ATIF: %d pending SBIOS requests\n", count);
318
319 if (req.pending & ATIF_PANEL_BRIGHTNESS_CHANGE_REQUEST) {
320 struct amdgpu_encoder *enc = atif->encoder_for_bl;
321
322 if (enc) {
323 struct amdgpu_encoder_atom_dig *dig = enc->enc_priv;
324
325 DRM_DEBUG_DRIVER("Changing brightness to %d\n",
326 req.backlight_level);
327
328 amdgpu_display_backlight_set_level(adev, enc, req.backlight_level);
329
330#if defined(CONFIG_BACKLIGHT_CLASS_DEVICE) || defined(CONFIG_BACKLIGHT_CLASS_DEVICE_MODULE)
331 backlight_force_update(dig->bl_dev,
332 BACKLIGHT_UPDATE_HOTKEY);
333#endif
334 }
335 }
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341
342
343 return NOTIFY_BAD;
344}
345
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357
358static union acpi_object *amdgpu_atcs_call(acpi_handle handle, int function,
359 struct acpi_buffer *params)
360{
361 acpi_status status;
362 union acpi_object atcs_arg_elements[2];
363 struct acpi_object_list atcs_arg;
364 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
365
366 atcs_arg.count = 2;
367 atcs_arg.pointer = &atcs_arg_elements[0];
368
369 atcs_arg_elements[0].type = ACPI_TYPE_INTEGER;
370 atcs_arg_elements[0].integer.value = function;
371
372 if (params) {
373 atcs_arg_elements[1].type = ACPI_TYPE_BUFFER;
374 atcs_arg_elements[1].buffer.length = params->length;
375 atcs_arg_elements[1].buffer.pointer = params->pointer;
376 } else {
377
378 atcs_arg_elements[1].type = ACPI_TYPE_INTEGER;
379 atcs_arg_elements[1].integer.value = 0;
380 }
381
382 status = acpi_evaluate_object(handle, "ATCS", &atcs_arg, &buffer);
383
384
385 if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) {
386 DRM_DEBUG_DRIVER("failed to evaluate ATCS got %s\n",
387 acpi_format_exception(status));
388 kfree(buffer.pointer);
389 return NULL;
390 }
391
392 return buffer.pointer;
393}
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403
404
405static void amdgpu_atcs_parse_functions(struct amdgpu_atcs_functions *f, u32 mask)
406{
407 f->get_ext_state = mask & ATCS_GET_EXTERNAL_STATE_SUPPORTED;
408 f->pcie_perf_req = mask & ATCS_PCIE_PERFORMANCE_REQUEST_SUPPORTED;
409 f->pcie_dev_rdy = mask & ATCS_PCIE_DEVICE_READY_NOTIFICATION_SUPPORTED;
410 f->pcie_bus_width = mask & ATCS_SET_PCIE_BUS_WIDTH_SUPPORTED;
411}
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423
424static int amdgpu_atcs_verify_interface(acpi_handle handle,
425 struct amdgpu_atcs *atcs)
426{
427 union acpi_object *info;
428 struct atcs_verify_interface output;
429 size_t size;
430 int err = 0;
431
432 info = amdgpu_atcs_call(handle, ATCS_FUNCTION_VERIFY_INTERFACE, NULL);
433 if (!info)
434 return -EIO;
435
436 memset(&output, 0, sizeof(output));
437
438 size = *(u16 *) info->buffer.pointer;
439 if (size < 8) {
440 DRM_INFO("ATCS buffer is too small: %zu\n", size);
441 err = -EINVAL;
442 goto out;
443 }
444 size = min(sizeof(output), size);
445
446 memcpy(&output, info->buffer.pointer, size);
447
448
449 DRM_DEBUG_DRIVER("ATCS version %u\n", output.version);
450
451 amdgpu_atcs_parse_functions(&atcs->functions, output.function_bits);
452
453out:
454 kfree(info);
455 return err;
456}
457
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464
465
466
467bool amdgpu_acpi_is_pcie_performance_request_supported(struct amdgpu_device *adev)
468{
469 struct amdgpu_atcs *atcs = &adev->atcs;
470
471 if (atcs->functions.pcie_perf_req && atcs->functions.pcie_dev_rdy)
472 return true;
473
474 return false;
475}
476
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484
485
486int amdgpu_acpi_pcie_notify_device_ready(struct amdgpu_device *adev)
487{
488 acpi_handle handle;
489 union acpi_object *info;
490 struct amdgpu_atcs *atcs = &adev->atcs;
491
492
493 handle = ACPI_HANDLE(&adev->pdev->dev);
494 if (!handle)
495 return -EINVAL;
496
497 if (!atcs->functions.pcie_dev_rdy)
498 return -EINVAL;
499
500 info = amdgpu_atcs_call(handle, ATCS_FUNCTION_PCIE_DEVICE_READY_NOTIFICATION, NULL);
501 if (!info)
502 return -EIO;
503
504 kfree(info);
505
506 return 0;
507}
508
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518
519
520int amdgpu_acpi_pcie_performance_request(struct amdgpu_device *adev,
521 u8 perf_req, bool advertise)
522{
523 acpi_handle handle;
524 union acpi_object *info;
525 struct amdgpu_atcs *atcs = &adev->atcs;
526 struct atcs_pref_req_input atcs_input;
527 struct atcs_pref_req_output atcs_output;
528 struct acpi_buffer params;
529 size_t size;
530 u32 retry = 3;
531
532
533 handle = ACPI_HANDLE(&adev->pdev->dev);
534 if (!handle)
535 return -EINVAL;
536
537 if (!atcs->functions.pcie_perf_req)
538 return -EINVAL;
539
540 atcs_input.size = sizeof(struct atcs_pref_req_input);
541
542 atcs_input.client_id = adev->pdev->devfn | (adev->pdev->bus->number << 8);
543 atcs_input.valid_flags_mask = ATCS_VALID_FLAGS_MASK;
544 atcs_input.flags = ATCS_WAIT_FOR_COMPLETION;
545 if (advertise)
546 atcs_input.flags |= ATCS_ADVERTISE_CAPS;
547 atcs_input.req_type = ATCS_PCIE_LINK_SPEED;
548 atcs_input.perf_req = perf_req;
549
550 params.length = sizeof(struct atcs_pref_req_input);
551 params.pointer = &atcs_input;
552
553 while (retry--) {
554 info = amdgpu_atcs_call(handle, ATCS_FUNCTION_PCIE_PERFORMANCE_REQUEST, ¶ms);
555 if (!info)
556 return -EIO;
557
558 memset(&atcs_output, 0, sizeof(atcs_output));
559
560 size = *(u16 *) info->buffer.pointer;
561 if (size < 3) {
562 DRM_INFO("ATCS buffer is too small: %zu\n", size);
563 kfree(info);
564 return -EINVAL;
565 }
566 size = min(sizeof(atcs_output), size);
567
568 memcpy(&atcs_output, info->buffer.pointer, size);
569
570 kfree(info);
571
572 switch (atcs_output.ret_val) {
573 case ATCS_REQUEST_REFUSED:
574 default:
575 return -EINVAL;
576 case ATCS_REQUEST_COMPLETE:
577 return 0;
578 case ATCS_REQUEST_IN_PROGRESS:
579 udelay(10);
580 break;
581 }
582 }
583
584 return 0;
585}
586
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596
597
598static int amdgpu_acpi_event(struct notifier_block *nb,
599 unsigned long val,
600 void *data)
601{
602 struct amdgpu_device *adev = container_of(nb, struct amdgpu_device, acpi_nb);
603 struct acpi_bus_event *entry = (struct acpi_bus_event *)data;
604
605 if (strcmp(entry->device_class, ACPI_AC_CLASS) == 0) {
606 if (power_supply_is_system_supplied() > 0)
607 DRM_DEBUG_DRIVER("pm: AC\n");
608 else
609 DRM_DEBUG_DRIVER("pm: DC\n");
610
611 amdgpu_pm_acpi_event_handler(adev);
612 }
613
614
615 return amdgpu_atif_handler(adev, entry);
616}
617
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621
622
623
624
625
626
627
628int amdgpu_acpi_init(struct amdgpu_device *adev)
629{
630 acpi_handle handle;
631 struct amdgpu_atif *atif = &adev->atif;
632 struct amdgpu_atcs *atcs = &adev->atcs;
633 int ret;
634
635
636 handle = ACPI_HANDLE(&adev->pdev->dev);
637
638 if (!adev->bios || !handle)
639 return 0;
640
641
642 ret = amdgpu_atcs_verify_interface(handle, atcs);
643 if (ret) {
644 DRM_DEBUG_DRIVER("Call to ATCS verify_interface failed: %d\n", ret);
645 }
646
647
648 ret = amdgpu_atif_verify_interface(handle, atif);
649 if (ret) {
650 DRM_DEBUG_DRIVER("Call to ATIF verify_interface failed: %d\n", ret);
651 goto out;
652 }
653
654 if (atif->notifications.brightness_change) {
655 struct drm_encoder *tmp;
656
657
658 list_for_each_entry(tmp, &adev->ddev->mode_config.encoder_list,
659 head) {
660 struct amdgpu_encoder *enc = to_amdgpu_encoder(tmp);
661
662 if ((enc->devices & (ATOM_DEVICE_LCD_SUPPORT)) &&
663 enc->enc_priv) {
664 if (adev->is_atom_bios) {
665 struct amdgpu_encoder_atom_dig *dig = enc->enc_priv;
666 if (dig->bl_dev) {
667 atif->encoder_for_bl = enc;
668 break;
669 }
670 }
671 }
672 }
673 }
674
675 if (atif->functions.sbios_requests && !atif->functions.system_params) {
676
677
678
679
680 atif->functions.system_params = true;
681 }
682
683 if (atif->functions.system_params) {
684 ret = amdgpu_atif_get_notification_params(handle,
685 &atif->notification_cfg);
686 if (ret) {
687 DRM_DEBUG_DRIVER("Call to GET_SYSTEM_PARAMS failed: %d\n",
688 ret);
689
690 atif->notification_cfg.enabled = false;
691 }
692 }
693
694out:
695 adev->acpi_nb.notifier_call = amdgpu_acpi_event;
696 register_acpi_notifier(&adev->acpi_nb);
697
698 return ret;
699}
700
701
702
703
704
705
706
707
708void amdgpu_acpi_fini(struct amdgpu_device *adev)
709{
710 unregister_acpi_notifier(&adev->acpi_nb);
711}
712