1 /*
2 * Copyright 2012 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 */
23
24 #include <linux/pci.h>
25 #include <linux/acpi.h>
26 #include <linux/slab.h>
27 #include <linux/power_supply.h>
28 #include <linux/pm_runtime.h>
29 #include <acpi/video.h>
30 #include <drm/drmP.h>
31 #include <drm/drm_crtc_helper.h>
32 #include "amdgpu.h"
33 #include "amdgpu_pm.h"
34 #include "amd_acpi.h"
35 #include "atom.h"
36
37 struct amdgpu_atif_notification_cfg {
38 bool enabled;
39 int command_code;
40 };
41
42 struct amdgpu_atif_notifications {
43 bool display_switch;
44 bool expansion_mode_change;
45 bool thermal_state;
46 bool forced_power_state;
47 bool system_power_state;
48 bool display_conf_change;
49 bool px_gfx_switch;
50 bool brightness_change;
51 bool dgpu_display_event;
52 };
53
54 struct amdgpu_atif_functions {
55 bool system_params;
56 bool sbios_requests;
57 bool select_active_disp;
58 bool lid_state;
59 bool get_tv_standard;
60 bool set_tv_standard;
61 bool get_panel_expansion_mode;
62 bool set_panel_expansion_mode;
63 bool temperature_change;
64 bool graphics_device_types;
65 };
66
67 struct amdgpu_atif {
68 ACPI_HANDLE handle;
69
70 struct amdgpu_atif_notifications notifications;
71 struct amdgpu_atif_functions functions;
72 struct amdgpu_atif_notification_cfg notification_cfg;
73 struct amdgpu_encoder *encoder_for_bl;
74 };
75
76 /* Call the ATIF method
77 */
78 /**
79 * amdgpu_atif_call - call an ATIF method
80 *
81 * @handle: acpi handle
82 * @function: the ATIF function to execute
83 * @params: ATIF function params
84 *
85 * Executes the requested ATIF function (all asics).
86 * Returns a pointer to the acpi output buffer.
87 */
amdgpu_atif_call(struct amdgpu_atif * atif,int function,ACPI_BUFFER * params)88 static ACPI_OBJECT *amdgpu_atif_call(struct amdgpu_atif *atif,
89 int function,
90 ACPI_BUFFER *params)
91 {
92 ACPI_STATUS status;
93 ACPI_OBJECT atif_arg_elements[2];
94 ACPI_OBJECT_LIST atif_arg;
95 ACPI_BUFFER buffer = { ACPI_ALLOCATE_BUFFER, NULL };
96
97 atif_arg.Count = 2;
98 atif_arg.Pointer = &atif_arg_elements[0];
99
100 atif_arg_elements[0].Type = ACPI_TYPE_INTEGER;
101 atif_arg_elements[0].Integer.Value = function;
102
103 if (params) {
104 atif_arg_elements[1].Type = ACPI_TYPE_BUFFER;
105 atif_arg_elements[1].Buffer.Length = params->Length;
106 atif_arg_elements[1].Buffer.Pointer = params->Pointer;
107 } else {
108 /* We need a second fake parameter */
109 atif_arg_elements[1].Type = ACPI_TYPE_INTEGER;
110 atif_arg_elements[1].Integer.Value = 0;
111 }
112
113 status = AcpiEvaluateObject(atif->handle, NULL, &atif_arg,
114 &buffer);
115
116 /* Fail only if calling the method fails and ATIF is supported */
117 if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) {
118 DRM_DEBUG_DRIVER("failed to evaluate ATIF got %s\n",
119 AcpiFormatException(status));
120 AcpiOsFree(buffer.Pointer);
121 return NULL;
122 }
123
124 return buffer.Pointer;
125 }
126
127 /**
128 * amdgpu_atif_parse_notification - parse supported notifications
129 *
130 * @n: supported notifications struct
131 * @mask: supported notifications mask from ATIF
132 *
133 * Use the supported notifications mask from ATIF function
134 * ATIF_FUNCTION_VERIFY_INTERFACE to determine what notifications
135 * are supported (all asics).
136 */
amdgpu_atif_parse_notification(struct amdgpu_atif_notifications * n,u32 mask)137 static void amdgpu_atif_parse_notification(struct amdgpu_atif_notifications *n, u32 mask)
138 {
139 n->display_switch = mask & ATIF_DISPLAY_SWITCH_REQUEST_SUPPORTED;
140 n->expansion_mode_change = mask & ATIF_EXPANSION_MODE_CHANGE_REQUEST_SUPPORTED;
141 n->thermal_state = mask & ATIF_THERMAL_STATE_CHANGE_REQUEST_SUPPORTED;
142 n->forced_power_state = mask & ATIF_FORCED_POWER_STATE_CHANGE_REQUEST_SUPPORTED;
143 n->system_power_state = mask & ATIF_SYSTEM_POWER_SOURCE_CHANGE_REQUEST_SUPPORTED;
144 n->display_conf_change = mask & ATIF_DISPLAY_CONF_CHANGE_REQUEST_SUPPORTED;
145 n->px_gfx_switch = mask & ATIF_PX_GFX_SWITCH_REQUEST_SUPPORTED;
146 n->brightness_change = mask & ATIF_PANEL_BRIGHTNESS_CHANGE_REQUEST_SUPPORTED;
147 n->dgpu_display_event = mask & ATIF_DGPU_DISPLAY_EVENT_SUPPORTED;
148 }
149
150 /**
151 * amdgpu_atif_parse_functions - parse supported functions
152 *
153 * @f: supported functions struct
154 * @mask: supported functions mask from ATIF
155 *
156 * Use the supported functions mask from ATIF function
157 * ATIF_FUNCTION_VERIFY_INTERFACE to determine what functions
158 * are supported (all asics).
159 */
amdgpu_atif_parse_functions(struct amdgpu_atif_functions * f,u32 mask)160 static void amdgpu_atif_parse_functions(struct amdgpu_atif_functions *f, u32 mask)
161 {
162 f->system_params = mask & ATIF_GET_SYSTEM_PARAMETERS_SUPPORTED;
163 f->sbios_requests = mask & ATIF_GET_SYSTEM_BIOS_REQUESTS_SUPPORTED;
164 f->select_active_disp = mask & ATIF_SELECT_ACTIVE_DISPLAYS_SUPPORTED;
165 f->lid_state = mask & ATIF_GET_LID_STATE_SUPPORTED;
166 f->get_tv_standard = mask & ATIF_GET_TV_STANDARD_FROM_CMOS_SUPPORTED;
167 f->set_tv_standard = mask & ATIF_SET_TV_STANDARD_IN_CMOS_SUPPORTED;
168 f->get_panel_expansion_mode = mask & ATIF_GET_PANEL_EXPANSION_MODE_FROM_CMOS_SUPPORTED;
169 f->set_panel_expansion_mode = mask & ATIF_SET_PANEL_EXPANSION_MODE_IN_CMOS_SUPPORTED;
170 f->temperature_change = mask & ATIF_TEMPERATURE_CHANGE_NOTIFICATION_SUPPORTED;
171 f->graphics_device_types = mask & ATIF_GET_GRAPHICS_DEVICE_TYPES_SUPPORTED;
172 }
173
174 /**
175 * amdgpu_atif_verify_interface - verify ATIF
176 *
177 * @handle: acpi handle
178 * @atif: amdgpu atif struct
179 *
180 * Execute the ATIF_FUNCTION_VERIFY_INTERFACE ATIF function
181 * to initialize ATIF and determine what features are supported
182 * (all asics).
183 * returns 0 on success, error on failure.
184 */
amdgpu_atif_verify_interface(struct amdgpu_atif * atif)185 static int amdgpu_atif_verify_interface(struct amdgpu_atif *atif)
186 {
187 ACPI_OBJECT *info;
188 struct atif_verify_interface output;
189 size_t size;
190 int err = 0;
191
192 info = amdgpu_atif_call(atif, ATIF_FUNCTION_VERIFY_INTERFACE, NULL);
193 if (!info)
194 return -EIO;
195
196 memset(&output, 0, sizeof(output));
197
198 size = *(u16 *) info->Buffer.Pointer;
199 if (size < 12) {
200 DRM_INFO("ATIF buffer is too small: %zu\n", size);
201 err = -EINVAL;
202 goto out;
203 }
204 size = min(sizeof(output), size);
205
206 memcpy(&output, info->Buffer.Pointer, size);
207
208 /* TODO: check version? */
209 DRM_DEBUG_DRIVER("ATIF version %u\n", output.version);
210
211 amdgpu_atif_parse_notification(&atif->notifications, output.notification_mask);
212 amdgpu_atif_parse_functions(&atif->functions, output.function_bits);
213
214 out:
215 AcpiOsFree(info);
216 return err;
217 }
218
amdgpu_atif_probe_handle(ACPI_HANDLE dhandle)219 static ACPI_HANDLE amdgpu_atif_probe_handle(ACPI_HANDLE dhandle)
220 {
221 ACPI_HANDLE handle = NULL;
222 char acpi_method_name[255] = { 0 };
223 ACPI_BUFFER buffer = { sizeof(acpi_method_name), acpi_method_name };
224 ACPI_STATUS status;
225
226 /* For PX/HG systems, ATIF and ATPX are in the iGPU's namespace, on dGPU only
227 * systems, ATIF is in the dGPU's namespace.
228 */
229 status = AcpiGetHandle(dhandle, "ATIF", &handle);
230 if (ACPI_SUCCESS(status))
231 goto out;
232
233 if (amdgpu_has_atpx()) {
234 status = AcpiGetHandle(amdgpu_atpx_get_dhandle(), "ATIF",
235 &handle);
236 if (ACPI_SUCCESS(status))
237 goto out;
238 }
239
240 DRM_DEBUG_DRIVER("No ATIF handle found\n");
241 return NULL;
242 out:
243 AcpiGetName(handle, ACPI_FULL_PATHNAME, &buffer);
244 DRM_DEBUG_DRIVER("Found ATIF handle %s\n", acpi_method_name);
245 return handle;
246 }
247
248 /**
249 * amdgpu_atif_get_notification_params - determine notify configuration
250 *
251 * @handle: acpi handle
252 * @n: atif notification configuration struct
253 *
254 * Execute the ATIF_FUNCTION_GET_SYSTEM_PARAMETERS ATIF function
255 * to determine if a notifier is used and if so which one
256 * (all asics). This is either Notify(VGA, 0x81) or Notify(VGA, n)
257 * where n is specified in the result if a notifier is used.
258 * Returns 0 on success, error on failure.
259 */
amdgpu_atif_get_notification_params(struct amdgpu_atif * atif)260 static int amdgpu_atif_get_notification_params(struct amdgpu_atif *atif)
261 {
262 ACPI_OBJECT *info;
263 struct amdgpu_atif_notification_cfg *n = &atif->notification_cfg;
264 struct atif_system_params params;
265 size_t size;
266 int err = 0;
267
268 info = amdgpu_atif_call(atif, ATIF_FUNCTION_GET_SYSTEM_PARAMETERS,
269 NULL);
270 if (!info) {
271 err = -EIO;
272 goto out;
273 }
274
275 size = *(u16 *) info->Buffer.Pointer;
276 if (size < 10) {
277 err = -EINVAL;
278 goto out;
279 }
280
281 memset(¶ms, 0, sizeof(params));
282 size = min(sizeof(params), size);
283 memcpy(¶ms, info->Buffer.Pointer, size);
284
285 DRM_DEBUG_DRIVER("SYSTEM_PARAMS: mask = %#x, flags = %#x\n",
286 params.flags, params.valid_mask);
287 params.flags = params.flags & params.valid_mask;
288
289 if ((params.flags & ATIF_NOTIFY_MASK) == ATIF_NOTIFY_NONE) {
290 n->enabled = false;
291 n->command_code = 0;
292 } else if ((params.flags & ATIF_NOTIFY_MASK) == ATIF_NOTIFY_81) {
293 n->enabled = true;
294 n->command_code = 0x81;
295 } else {
296 if (size < 11) {
297 err = -EINVAL;
298 goto out;
299 }
300 n->enabled = true;
301 n->command_code = params.command_code;
302 }
303
304 out:
305 DRM_DEBUG_DRIVER("Notification %s, command code = %#x\n",
306 (n->enabled ? "enabled" : "disabled"),
307 n->command_code);
308 AcpiOsFree(info);
309 return err;
310 }
311
312 /**
313 * amdgpu_atif_get_sbios_requests - get requested sbios event
314 *
315 * @handle: acpi handle
316 * @req: atif sbios request struct
317 *
318 * Execute the ATIF_FUNCTION_GET_SYSTEM_BIOS_REQUESTS ATIF function
319 * to determine what requests the sbios is making to the driver
320 * (all asics).
321 * Returns 0 on success, error on failure.
322 */
amdgpu_atif_get_sbios_requests(struct amdgpu_atif * atif,struct atif_sbios_requests * req)323 static int amdgpu_atif_get_sbios_requests(struct amdgpu_atif *atif,
324 struct atif_sbios_requests *req)
325 {
326 ACPI_OBJECT *info;
327 size_t size;
328 int count = 0;
329
330 info = amdgpu_atif_call(atif, ATIF_FUNCTION_GET_SYSTEM_BIOS_REQUESTS,
331 NULL);
332 if (!info)
333 return -EIO;
334
335 size = *(u16 *)info->Buffer.Pointer;
336 if (size < 0xd) {
337 count = -EINVAL;
338 goto out;
339 }
340 memset(req, 0, sizeof(*req));
341
342 size = min(sizeof(*req), size);
343 memcpy(req, info->Buffer.Pointer, size);
344 DRM_DEBUG_DRIVER("SBIOS pending requests: %#x\n", req->pending);
345
346 count = hweight32(req->pending);
347
348 out:
349 AcpiOsFree(info);
350 return count;
351 }
352
353 /**
354 * amdgpu_atif_handler - handle ATIF notify requests
355 *
356 * @adev: amdgpu_device pointer
357 * @event: atif sbios request struct
358 *
359 * Checks the acpi event and if it matches an atif event,
360 * handles it.
361 *
362 * Returns:
363 * NOTIFY_BAD or NOTIFY_DONE, depending on the event.
364 */
amdgpu_atif_handler(struct amdgpu_device * adev,UINT32 type)365 static void amdgpu_atif_handler(struct amdgpu_device *adev,
366 UINT32 type)
367 {
368 struct amdgpu_atif *atif = adev->atif;
369 int count;
370
371 DRM_DEBUG_DRIVER("event, type = %#x\n", type);
372
373 /* Is this actually our event? */
374 if (!atif ||
375 !atif->notification_cfg.enabled ||
376 type != atif->notification_cfg.command_code) {
377 /* These events will generate keypresses otherwise */
378 #if 0
379 if (event->type == ACPI_VIDEO_NOTIFY_PROBE)
380 return NOTIFY_BAD;
381 else
382 return NOTIFY_DONE;
383 #endif
384 }
385
386 if (atif->functions.sbios_requests) {
387 struct atif_sbios_requests req;
388
389 /* Check pending SBIOS requests */
390 count = amdgpu_atif_get_sbios_requests(atif, &req);
391
392 if (count <= 0)
393 return;
394
395 DRM_DEBUG_DRIVER("ATIF: %d pending SBIOS requests\n", count);
396
397 /* todo: add DC handling */
398 if ((req.pending & ATIF_PANEL_BRIGHTNESS_CHANGE_REQUEST) &&
399 !amdgpu_device_has_dc_support(adev)) {
400 struct amdgpu_encoder *enc = atif->encoder_for_bl;
401
402 if (enc) {
403 #if 0
404 struct amdgpu_encoder_atom_dig *dig = enc->enc_priv;
405 #endif
406
407 DRM_DEBUG_DRIVER("Changing brightness to %d\n",
408 req.backlight_level);
409
410 amdgpu_display_backlight_set_level(adev, enc, req.backlight_level);
411 #if 0
412 #if defined(CONFIG_BACKLIGHT_CLASS_DEVICE) || defined(CONFIG_BACKLIGHT_CLASS_DEVICE_MODULE)
413 backlight_force_update(dig->bl_dev,
414 BACKLIGHT_UPDATE_HOTKEY);
415 #endif
416 #endif
417 }
418 }
419 if (req.pending & ATIF_DGPU_DISPLAY_EVENT) {
420 if (adev->flags & AMD_IS_PX) {
421 pm_runtime_get_sync(adev->ddev->dev);
422 /* Just fire off a uevent and let userspace tell us what to do */
423 drm_helper_hpd_irq_event(adev->ddev);
424 pm_runtime_mark_last_busy(adev->ddev->dev);
425 pm_runtime_put_autosuspend(adev->ddev->dev);
426 }
427 }
428 /* TODO: check other events */
429 }
430
431 /* We've handled the event, stop the notifier chain. The ACPI interface
432 * overloads ACPI_VIDEO_NOTIFY_PROBE, we don't want to send that to
433 * userspace if the event was generated only to signal a SBIOS
434 * request.
435 */
436 return;
437 }
438
439 /* Call the ATCS method
440 */
441 /**
442 * amdgpu_atcs_call - call an ATCS method
443 *
444 * @handle: acpi handle
445 * @function: the ATCS function to execute
446 * @params: ATCS function params
447 *
448 * Executes the requested ATCS function (all asics).
449 * Returns a pointer to the acpi output buffer.
450 */
amdgpu_atcs_call(ACPI_HANDLE handle,int function,ACPI_BUFFER * params)451 static ACPI_OBJECT *amdgpu_atcs_call(ACPI_HANDLE handle, int function,
452 ACPI_BUFFER *params)
453 {
454 ACPI_STATUS status;
455 ACPI_OBJECT atcs_arg_elements[2];
456 ACPI_OBJECT_LIST atcs_arg;
457 ACPI_BUFFER buffer = { ACPI_ALLOCATE_BUFFER, NULL };
458
459 atcs_arg.Count = 2;
460 atcs_arg.Pointer = &atcs_arg_elements[0];
461
462 atcs_arg_elements[0].Type = ACPI_TYPE_INTEGER;
463 atcs_arg_elements[0].Integer.Value = function;
464
465 if (params) {
466 atcs_arg_elements[1].Type = ACPI_TYPE_BUFFER;
467 atcs_arg_elements[1].Buffer.Length = params->Length;
468 atcs_arg_elements[1].Buffer.Pointer = params->Pointer;
469 } else {
470 /* We need a second fake parameter */
471 atcs_arg_elements[1].Type = ACPI_TYPE_INTEGER;
472 atcs_arg_elements[1].Integer.Value = 0;
473 }
474
475 status = AcpiEvaluateObject(handle, "ATCS", &atcs_arg, &buffer);
476
477 /* Fail only if calling the method fails and ATIF is supported */
478 if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) {
479 DRM_DEBUG_DRIVER("failed to evaluate ATCS got %s\n",
480 AcpiFormatException(status));
481 AcpiOsFree(buffer.Pointer);
482 return NULL;
483 }
484
485 return buffer.Pointer;
486 }
487
488 /**
489 * amdgpu_atcs_parse_functions - parse supported functions
490 *
491 * @f: supported functions struct
492 * @mask: supported functions mask from ATCS
493 *
494 * Use the supported functions mask from ATCS function
495 * ATCS_FUNCTION_VERIFY_INTERFACE to determine what functions
496 * are supported (all asics).
497 */
amdgpu_atcs_parse_functions(struct amdgpu_atcs_functions * f,u32 mask)498 static void amdgpu_atcs_parse_functions(struct amdgpu_atcs_functions *f, u32 mask)
499 {
500 f->get_ext_state = mask & ATCS_GET_EXTERNAL_STATE_SUPPORTED;
501 f->pcie_perf_req = mask & ATCS_PCIE_PERFORMANCE_REQUEST_SUPPORTED;
502 f->pcie_dev_rdy = mask & ATCS_PCIE_DEVICE_READY_NOTIFICATION_SUPPORTED;
503 f->pcie_bus_width = mask & ATCS_SET_PCIE_BUS_WIDTH_SUPPORTED;
504 }
505
506 /**
507 * amdgpu_atcs_verify_interface - verify ATCS
508 *
509 * @handle: acpi handle
510 * @atcs: amdgpu atcs struct
511 *
512 * Execute the ATCS_FUNCTION_VERIFY_INTERFACE ATCS function
513 * to initialize ATCS and determine what features are supported
514 * (all asics).
515 * returns 0 on success, error on failure.
516 */
amdgpu_atcs_verify_interface(ACPI_HANDLE handle,struct amdgpu_atcs * atcs)517 static int amdgpu_atcs_verify_interface(ACPI_HANDLE handle,
518 struct amdgpu_atcs *atcs)
519 {
520 ACPI_OBJECT *info;
521 struct atcs_verify_interface output;
522 size_t size;
523 int err = 0;
524
525 info = amdgpu_atcs_call(handle, ATCS_FUNCTION_VERIFY_INTERFACE, NULL);
526 if (!info)
527 return -EIO;
528
529 memset(&output, 0, sizeof(output));
530
531 size = *(u16 *) info->Buffer.Pointer;
532 if (size < 8) {
533 DRM_INFO("ATCS buffer is too small: %zu\n", size);
534 err = -EINVAL;
535 goto out;
536 }
537 size = min(sizeof(output), size);
538
539 memcpy(&output, info->Buffer.Pointer, size);
540
541 /* TODO: check version? */
542 DRM_DEBUG_DRIVER("ATCS version %u\n", output.version);
543
544 amdgpu_atcs_parse_functions(&atcs->functions, output.function_bits);
545
546 out:
547 AcpiOsFree(info);
548 return err;
549 }
550
551 /**
552 * amdgpu_acpi_is_pcie_performance_request_supported
553 *
554 * @adev: amdgpu_device pointer
555 *
556 * Check if the ATCS pcie_perf_req and pcie_dev_rdy methods
557 * are supported (all asics).
558 * returns true if supported, false if not.
559 */
amdgpu_acpi_is_pcie_performance_request_supported(struct amdgpu_device * adev)560 bool amdgpu_acpi_is_pcie_performance_request_supported(struct amdgpu_device *adev)
561 {
562 struct amdgpu_atcs *atcs = &adev->atcs;
563
564 if (atcs->functions.pcie_perf_req && atcs->functions.pcie_dev_rdy)
565 return true;
566
567 return false;
568 }
569
570 /**
571 * amdgpu_acpi_pcie_notify_device_ready
572 *
573 * @adev: amdgpu_device pointer
574 *
575 * Executes the PCIE_DEVICE_READY_NOTIFICATION method
576 * (all asics).
577 * returns 0 on success, error on failure.
578 */
amdgpu_acpi_pcie_notify_device_ready(struct amdgpu_device * adev)579 int amdgpu_acpi_pcie_notify_device_ready(struct amdgpu_device *adev)
580 {
581 ACPI_HANDLE handle;
582 ACPI_OBJECT *info;
583 struct amdgpu_atcs *atcs = &adev->atcs;
584
585 /* Get the device handle */
586 handle = acpi_get_handle(adev->dev->bsddev);
587 if (!handle)
588 return -EINVAL;
589
590 if (!atcs->functions.pcie_dev_rdy)
591 return -EINVAL;
592
593 info = amdgpu_atcs_call(handle, ATCS_FUNCTION_PCIE_DEVICE_READY_NOTIFICATION, NULL);
594 if (!info)
595 return -EIO;
596
597 AcpiOsFree(info);
598
599 return 0;
600 }
601
602 /**
603 * amdgpu_acpi_pcie_performance_request
604 *
605 * @adev: amdgpu_device pointer
606 * @perf_req: requested perf level (pcie gen speed)
607 * @advertise: set advertise caps flag if set
608 *
609 * Executes the PCIE_PERFORMANCE_REQUEST method to
610 * change the pcie gen speed (all asics).
611 * returns 0 on success, error on failure.
612 */
amdgpu_acpi_pcie_performance_request(struct amdgpu_device * adev,u8 perf_req,bool advertise)613 int amdgpu_acpi_pcie_performance_request(struct amdgpu_device *adev,
614 u8 perf_req, bool advertise)
615 {
616 #if 0
617 ACPI_HANDLE handle;
618 ACPI_OBJECT *info;
619 struct amdgpu_atcs *atcs = &adev->atcs;
620 struct atcs_pref_req_input atcs_input;
621 struct atcs_pref_req_output atcs_output;
622 ACPI_BUFFER params;
623 size_t size;
624 u32 retry = 3;
625
626 if (amdgpu_acpi_pcie_notify_device_ready(adev))
627 return -EINVAL;
628
629 /* Get the device handle */
630 handle = acpi_get_handle(adev->dev->bsddev)
631 if (!handle)
632 return -EINVAL;
633
634 if (!atcs->functions.pcie_perf_req)
635 return -EINVAL;
636
637 atcs_input.size = sizeof(struct atcs_pref_req_input);
638 /* client id (bit 2-0: func num, 7-3: dev num, 15-8: bus num) */
639 atcs_input.client_id = adev->pdev->devfn | (adev->pdev->bus->number << 8);
640 atcs_input.valid_flags_mask = ATCS_VALID_FLAGS_MASK;
641 atcs_input.flags = ATCS_WAIT_FOR_COMPLETION;
642 if (advertise)
643 atcs_input.flags |= ATCS_ADVERTISE_CAPS;
644 atcs_input.req_type = ATCS_PCIE_LINK_SPEED;
645 atcs_input.perf_req = perf_req;
646
647 params.Length = sizeof(struct atcs_pref_req_input);
648 params.Pointer = &atcs_input;
649
650 while (retry--) {
651 info = amdgpu_atcs_call(handle, ATCS_FUNCTION_PCIE_PERFORMANCE_REQUEST, ¶ms);
652 if (!info)
653 return -EIO;
654
655 memset(&atcs_output, 0, sizeof(atcs_output));
656
657 size = *(u16 *) info->Buffer.Pointer;
658 if (size < 3) {
659 DRM_INFO("ATCS buffer is too small: %zu\n", size);
660 AcpiOsFree(info);
661 return -EINVAL;
662 }
663 size = min(sizeof(atcs_output), size);
664
665 memcpy(&atcs_output, info->Buffer.Pointer, size);
666
667 AcpiOsFree(info);
668
669 switch (atcs_output.ret_val) {
670 case ATCS_REQUEST_REFUSED:
671 default:
672 return -EINVAL;
673 case ATCS_REQUEST_COMPLETE:
674 return 0;
675 case ATCS_REQUEST_IN_PROGRESS:
676 udelay(10);
677 break;
678 }
679 }
680
681 return 0;
682 #else
683 return -EINVAL;
684 #endif
685 }
686
687 /**
688 * amdgpu_acpi_event - handle notify events
689 *
690 * @nb: notifier block
691 * @val: val
692 * @data: acpi event
693 *
694 * Calls relevant amdgpu functions in response to various
695 * acpi events.
696 * Returns NOTIFY code
697 */
amdgpu_acpi_event(ACPI_HANDLE handle,UINT32 type,void * context)698 static void amdgpu_acpi_event(ACPI_HANDLE handle,
699 UINT32 type,
700 void *context)
701 {
702 struct amdgpu_device *adev = (struct amdgpu_device *)context;
703
704 #if 0
705 if (strcmp(entry->device_class, ACPI_AC_CLASS) == 0) {
706 if (power_supply_is_system_supplied() > 0)
707 DRM_DEBUG_DRIVER("pm: AC\n");
708 else
709 DRM_DEBUG_DRIVER("pm: DC\n");
710
711 amdgpu_pm_acpi_event_handler(adev);
712 }
713 #endif
714
715 /* Check for pending SBIOS requests */
716 return amdgpu_atif_handler(adev, type);
717 }
718
719 /* Call all ACPI methods here */
720 /**
721 * amdgpu_acpi_init - init driver acpi support
722 *
723 * @adev: amdgpu_device pointer
724 *
725 * Verifies the AMD ACPI interfaces and registers with the acpi
726 * notifier chain (all asics).
727 * Returns 0 on success, error on failure.
728 */
amdgpu_acpi_init(struct amdgpu_device * adev)729 int amdgpu_acpi_init(struct amdgpu_device *adev)
730 {
731 ACPI_HANDLE handle, atif_handle;
732 struct amdgpu_atif *atif;
733 struct amdgpu_atcs *atcs = &adev->atcs;
734 int ret;
735
736 /* Get the device handle */
737 handle = acpi_get_handle(adev->dev->bsddev);
738
739 if (!adev->bios || !handle)
740 return 0;
741
742 /* Call the ATCS method */
743 ret = amdgpu_atcs_verify_interface(handle, atcs);
744 if (ret) {
745 DRM_DEBUG_DRIVER("Call to ATCS verify_interface failed: %d\n", ret);
746 }
747
748 /* Probe for ATIF, and initialize it if found */
749 atif_handle = amdgpu_atif_probe_handle(handle);
750 if (!atif_handle)
751 goto out;
752
753 atif = kzalloc(sizeof(*atif), GFP_KERNEL);
754 if (!atif) {
755 DRM_WARN("Not enough memory to initialize ATIF\n");
756 goto out;
757 }
758 atif->handle = atif_handle;
759
760 /* Call the ATIF method */
761 ret = amdgpu_atif_verify_interface(atif);
762 if (ret) {
763 DRM_DEBUG_DRIVER("Call to ATIF verify_interface failed: %d\n", ret);
764 AcpiOsFree(atif);
765 goto out;
766 }
767 adev->atif = atif;
768
769 if (atif->notifications.brightness_change) {
770 struct drm_encoder *tmp;
771
772 /* Find the encoder controlling the brightness */
773 list_for_each_entry(tmp, &adev->ddev->mode_config.encoder_list,
774 head) {
775 struct amdgpu_encoder *enc = to_amdgpu_encoder(tmp);
776
777 if ((enc->devices & (ATOM_DEVICE_LCD_SUPPORT)) &&
778 enc->enc_priv) {
779 struct amdgpu_encoder_atom_dig *dig = enc->enc_priv;
780 if (dig->bl_dev) {
781 atif->encoder_for_bl = enc;
782 break;
783 }
784 }
785 }
786 }
787
788 if (atif->functions.sbios_requests && !atif->functions.system_params) {
789 /* XXX check this workraround, if sbios request function is
790 * present we have to see how it's configured in the system
791 * params
792 */
793 atif->functions.system_params = true;
794 }
795
796 if (atif->functions.system_params) {
797 ret = amdgpu_atif_get_notification_params(atif);
798 if (ret) {
799 DRM_DEBUG_DRIVER("Call to GET_SYSTEM_PARAMS failed: %d\n",
800 ret);
801 /* Disable notification */
802 atif->notification_cfg.enabled = false;
803 }
804 }
805
806 out:
807 adev->acpi.handle = handle;
808 adev->acpi.notifier_call = amdgpu_acpi_event;
809 AcpiInstallNotifyHandler(handle, ACPI_DEVICE_NOTIFY,
810 adev->acpi.notifier_call, adev);
811
812 return ret;
813 }
814
815 /**
816 * amdgpu_acpi_fini - tear down driver acpi support
817 *
818 * @adev: amdgpu_device pointer
819 *
820 * Unregisters with the acpi notifier chain (all asics).
821 */
amdgpu_acpi_fini(struct amdgpu_device * adev)822 void amdgpu_acpi_fini(struct amdgpu_device *adev)
823 {
824 if (adev->atif)
825 AcpiOsFree(adev->atif);
826 }
827