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 "amdgpu_display.h" |
35 | #include "amd_acpi.h" |
36 | #include "atom.h" |
37 | |
38 | struct amdgpu_atif_notification_cfg { |
39 | bool enabled; |
40 | int command_code; |
41 | }; |
42 | |
43 | struct amdgpu_atif_notifications { |
44 | bool thermal_state; |
45 | bool forced_power_state; |
46 | bool system_power_state; |
47 | bool brightness_change; |
48 | bool dgpu_display_event; |
49 | bool gpu_package_power_limit; |
50 | }; |
51 | |
52 | struct amdgpu_atif_functions { |
53 | bool system_params; |
54 | bool sbios_requests; |
55 | bool temperature_change; |
56 | bool query_backlight_transfer_characteristics; |
57 | bool ready_to_undock; |
58 | bool external_gpu_information; |
59 | }; |
60 | |
61 | struct amdgpu_atif { |
62 | acpi_handle handle; |
63 | |
64 | struct amdgpu_atif_notifications notifications; |
65 | struct amdgpu_atif_functions functions; |
66 | struct amdgpu_atif_notification_cfg notification_cfg; |
67 | struct amdgpu_encoder *encoder_for_bl; |
68 | struct amdgpu_dm_backlight_caps backlight_caps; |
69 | }; |
70 | |
71 | /* Call the ATIF method |
72 | */ |
73 | /** |
74 | * amdgpu_atif_call - call an ATIF method |
75 | * |
76 | * @handle: acpi handle |
77 | * @function: the ATIF function to execute |
78 | * @params: ATIF function params |
79 | * |
80 | * Executes the requested ATIF function (all asics). |
81 | * Returns a pointer to the acpi output buffer. |
82 | */ |
83 | static union acpi_object *amdgpu_atif_call(struct amdgpu_atif *atif, |
84 | int function, |
85 | struct acpi_buffer *params) |
86 | { |
87 | acpi_status status; |
88 | union acpi_object atif_arg_elements[2]; |
89 | struct acpi_object_list atif_arg; |
90 | struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; |
91 | |
92 | atif_arg.count = 2; |
93 | atif_arg.pointer = &atif_arg_elements[0]; |
94 | |
95 | atif_arg_elements[0].type = ACPI_TYPE_INTEGER; |
96 | atif_arg_elements[0].integer.value = function; |
97 | |
98 | if (params) { |
99 | atif_arg_elements[1].type = ACPI_TYPE_BUFFER; |
100 | atif_arg_elements[1].buffer.length = params->length; |
101 | atif_arg_elements[1].buffer.pointer = params->pointer; |
102 | } else { |
103 | /* We need a second fake parameter */ |
104 | atif_arg_elements[1].type = ACPI_TYPE_INTEGER; |
105 | atif_arg_elements[1].integer.value = 0; |
106 | } |
107 | |
108 | status = acpi_evaluate_object(atif->handle, NULL, &atif_arg, |
109 | &buffer); |
110 | |
111 | /* Fail only if calling the method fails and ATIF is supported */ |
112 | if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) { |
113 | DRM_DEBUG_DRIVER("failed to evaluate ATIF got %s\n" , |
114 | acpi_format_exception(status)); |
115 | kfree(buffer.pointer); |
116 | return NULL; |
117 | } |
118 | |
119 | return buffer.pointer; |
120 | } |
121 | |
122 | /** |
123 | * amdgpu_atif_parse_notification - parse supported notifications |
124 | * |
125 | * @n: supported notifications struct |
126 | * @mask: supported notifications mask from ATIF |
127 | * |
128 | * Use the supported notifications mask from ATIF function |
129 | * ATIF_FUNCTION_VERIFY_INTERFACE to determine what notifications |
130 | * are supported (all asics). |
131 | */ |
132 | static void amdgpu_atif_parse_notification(struct amdgpu_atif_notifications *n, u32 mask) |
133 | { |
134 | n->thermal_state = mask & ATIF_THERMAL_STATE_CHANGE_REQUEST_SUPPORTED; |
135 | n->forced_power_state = mask & ATIF_FORCED_POWER_STATE_CHANGE_REQUEST_SUPPORTED; |
136 | n->system_power_state = mask & ATIF_SYSTEM_POWER_SOURCE_CHANGE_REQUEST_SUPPORTED; |
137 | n->brightness_change = mask & ATIF_PANEL_BRIGHTNESS_CHANGE_REQUEST_SUPPORTED; |
138 | n->dgpu_display_event = mask & ATIF_DGPU_DISPLAY_EVENT_SUPPORTED; |
139 | n->gpu_package_power_limit = mask & ATIF_GPU_PACKAGE_POWER_LIMIT_REQUEST_SUPPORTED; |
140 | } |
141 | |
142 | /** |
143 | * amdgpu_atif_parse_functions - parse supported functions |
144 | * |
145 | * @f: supported functions struct |
146 | * @mask: supported functions mask from ATIF |
147 | * |
148 | * Use the supported functions mask from ATIF function |
149 | * ATIF_FUNCTION_VERIFY_INTERFACE to determine what functions |
150 | * are supported (all asics). |
151 | */ |
152 | static void amdgpu_atif_parse_functions(struct amdgpu_atif_functions *f, u32 mask) |
153 | { |
154 | f->system_params = mask & ATIF_GET_SYSTEM_PARAMETERS_SUPPORTED; |
155 | f->sbios_requests = mask & ATIF_GET_SYSTEM_BIOS_REQUESTS_SUPPORTED; |
156 | f->temperature_change = mask & ATIF_TEMPERATURE_CHANGE_NOTIFICATION_SUPPORTED; |
157 | f->query_backlight_transfer_characteristics = |
158 | mask & ATIF_QUERY_BACKLIGHT_TRANSFER_CHARACTERISTICS_SUPPORTED; |
159 | f->ready_to_undock = mask & ATIF_READY_TO_UNDOCK_NOTIFICATION_SUPPORTED; |
160 | f->external_gpu_information = mask & ATIF_GET_EXTERNAL_GPU_INFORMATION_SUPPORTED; |
161 | } |
162 | |
163 | /** |
164 | * amdgpu_atif_verify_interface - verify ATIF |
165 | * |
166 | * @handle: acpi handle |
167 | * @atif: amdgpu atif struct |
168 | * |
169 | * Execute the ATIF_FUNCTION_VERIFY_INTERFACE ATIF function |
170 | * to initialize ATIF and determine what features are supported |
171 | * (all asics). |
172 | * returns 0 on success, error on failure. |
173 | */ |
174 | static int amdgpu_atif_verify_interface(struct amdgpu_atif *atif) |
175 | { |
176 | union acpi_object *info; |
177 | struct atif_verify_interface output; |
178 | size_t size; |
179 | int err = 0; |
180 | |
181 | info = amdgpu_atif_call(atif, ATIF_FUNCTION_VERIFY_INTERFACE, NULL); |
182 | if (!info) |
183 | return -EIO; |
184 | |
185 | memset(&output, 0, sizeof(output)); |
186 | |
187 | size = *(u16 *) info->buffer.pointer; |
188 | if (size < 12) { |
189 | DRM_INFO("ATIF buffer is too small: %zu\n" , size); |
190 | err = -EINVAL; |
191 | goto out; |
192 | } |
193 | size = min(sizeof(output), size); |
194 | |
195 | memcpy(&output, info->buffer.pointer, size); |
196 | |
197 | /* TODO: check version? */ |
198 | DRM_DEBUG_DRIVER("ATIF version %u\n" , output.version); |
199 | |
200 | amdgpu_atif_parse_notification(&atif->notifications, output.notification_mask); |
201 | amdgpu_atif_parse_functions(&atif->functions, output.function_bits); |
202 | |
203 | out: |
204 | kfree(info); |
205 | return err; |
206 | } |
207 | |
208 | static acpi_handle amdgpu_atif_probe_handle(acpi_handle dhandle) |
209 | { |
210 | acpi_handle handle = NULL; |
211 | char acpi_method_name[255] = { 0 }; |
212 | struct acpi_buffer buffer = { sizeof(acpi_method_name), acpi_method_name }; |
213 | acpi_status status; |
214 | |
215 | /* For PX/HG systems, ATIF and ATPX are in the iGPU's namespace, on dGPU only |
216 | * systems, ATIF is in the dGPU's namespace. |
217 | */ |
218 | status = acpi_get_handle(dhandle, "ATIF" , &handle); |
219 | if (ACPI_SUCCESS(status)) |
220 | goto out; |
221 | |
222 | if (amdgpu_has_atpx()) { |
223 | status = acpi_get_handle(amdgpu_atpx_get_dhandle(), "ATIF" , |
224 | &handle); |
225 | if (ACPI_SUCCESS(status)) |
226 | goto out; |
227 | } |
228 | |
229 | DRM_DEBUG_DRIVER("No ATIF handle found\n" ); |
230 | return NULL; |
231 | out: |
232 | acpi_get_name(handle, ACPI_FULL_PATHNAME, &buffer); |
233 | DRM_DEBUG_DRIVER("Found ATIF handle %s\n" , acpi_method_name); |
234 | return handle; |
235 | } |
236 | |
237 | /** |
238 | * amdgpu_atif_get_notification_params - determine notify configuration |
239 | * |
240 | * @handle: acpi handle |
241 | * @n: atif notification configuration struct |
242 | * |
243 | * Execute the ATIF_FUNCTION_GET_SYSTEM_PARAMETERS ATIF function |
244 | * to determine if a notifier is used and if so which one |
245 | * (all asics). This is either Notify(VGA, 0x81) or Notify(VGA, n) |
246 | * where n is specified in the result if a notifier is used. |
247 | * Returns 0 on success, error on failure. |
248 | */ |
249 | static int amdgpu_atif_get_notification_params(struct amdgpu_atif *atif) |
250 | { |
251 | union acpi_object *info; |
252 | struct amdgpu_atif_notification_cfg *n = &atif->notification_cfg; |
253 | struct atif_system_params params; |
254 | size_t size; |
255 | int err = 0; |
256 | |
257 | info = amdgpu_atif_call(atif, ATIF_FUNCTION_GET_SYSTEM_PARAMETERS, |
258 | NULL); |
259 | if (!info) { |
260 | err = -EIO; |
261 | goto out; |
262 | } |
263 | |
264 | size = *(u16 *) info->buffer.pointer; |
265 | if (size < 10) { |
266 | err = -EINVAL; |
267 | goto out; |
268 | } |
269 | |
270 | memset(¶ms, 0, sizeof(params)); |
271 | size = min(sizeof(params), size); |
272 | memcpy(¶ms, info->buffer.pointer, size); |
273 | |
274 | DRM_DEBUG_DRIVER("SYSTEM_PARAMS: mask = %#x, flags = %#x\n" , |
275 | params.flags, params.valid_mask); |
276 | params.flags = params.flags & params.valid_mask; |
277 | |
278 | if ((params.flags & ATIF_NOTIFY_MASK) == ATIF_NOTIFY_NONE) { |
279 | n->enabled = false; |
280 | n->command_code = 0; |
281 | } else if ((params.flags & ATIF_NOTIFY_MASK) == ATIF_NOTIFY_81) { |
282 | n->enabled = true; |
283 | n->command_code = 0x81; |
284 | } else { |
285 | if (size < 11) { |
286 | err = -EINVAL; |
287 | goto out; |
288 | } |
289 | n->enabled = true; |
290 | n->command_code = params.command_code; |
291 | } |
292 | |
293 | out: |
294 | DRM_DEBUG_DRIVER("Notification %s, command code = %#x\n" , |
295 | (n->enabled ? "enabled" : "disabled" ), |
296 | n->command_code); |
297 | kfree(info); |
298 | return err; |
299 | } |
300 | |
301 | /** |
302 | * amdgpu_atif_query_backlight_caps - get min and max backlight input signal |
303 | * |
304 | * @handle: acpi handle |
305 | * |
306 | * Execute the QUERY_BRIGHTNESS_TRANSFER_CHARACTERISTICS ATIF function |
307 | * to determine the acceptable range of backlight values |
308 | * |
309 | * Backlight_caps.caps_valid will be set to true if the query is successful |
310 | * |
311 | * The input signals are in range 0-255 |
312 | * |
313 | * This function assumes the display with backlight is the first LCD |
314 | * |
315 | * Returns 0 on success, error on failure. |
316 | */ |
317 | static int amdgpu_atif_query_backlight_caps(struct amdgpu_atif *atif) |
318 | { |
319 | union acpi_object *info; |
320 | struct atif_qbtc_output characteristics; |
321 | struct atif_qbtc_arguments arguments; |
322 | struct acpi_buffer params; |
323 | size_t size; |
324 | int err = 0; |
325 | |
326 | arguments.size = sizeof(arguments); |
327 | arguments.requested_display = ATIF_QBTC_REQUEST_LCD1; |
328 | |
329 | params.length = sizeof(arguments); |
330 | params.pointer = (void *)&arguments; |
331 | |
332 | info = amdgpu_atif_call(atif, |
333 | ATIF_FUNCTION_QUERY_BRIGHTNESS_TRANSFER_CHARACTERISTICS, |
334 | ¶ms); |
335 | if (!info) { |
336 | err = -EIO; |
337 | goto out; |
338 | } |
339 | |
340 | size = *(u16 *) info->buffer.pointer; |
341 | if (size < 10) { |
342 | err = -EINVAL; |
343 | goto out; |
344 | } |
345 | |
346 | memset(&characteristics, 0, sizeof(characteristics)); |
347 | size = min(sizeof(characteristics), size); |
348 | memcpy(&characteristics, info->buffer.pointer, size); |
349 | |
350 | atif->backlight_caps.caps_valid = true; |
351 | atif->backlight_caps.min_input_signal = |
352 | characteristics.min_input_signal; |
353 | atif->backlight_caps.max_input_signal = |
354 | characteristics.max_input_signal; |
355 | out: |
356 | kfree(info); |
357 | return err; |
358 | } |
359 | |
360 | /** |
361 | * amdgpu_atif_get_sbios_requests - get requested sbios event |
362 | * |
363 | * @handle: acpi handle |
364 | * @req: atif sbios request struct |
365 | * |
366 | * Execute the ATIF_FUNCTION_GET_SYSTEM_BIOS_REQUESTS ATIF function |
367 | * to determine what requests the sbios is making to the driver |
368 | * (all asics). |
369 | * Returns 0 on success, error on failure. |
370 | */ |
371 | static int amdgpu_atif_get_sbios_requests(struct amdgpu_atif *atif, |
372 | struct atif_sbios_requests *req) |
373 | { |
374 | union acpi_object *info; |
375 | size_t size; |
376 | int count = 0; |
377 | |
378 | info = amdgpu_atif_call(atif, ATIF_FUNCTION_GET_SYSTEM_BIOS_REQUESTS, |
379 | NULL); |
380 | if (!info) |
381 | return -EIO; |
382 | |
383 | size = *(u16 *)info->buffer.pointer; |
384 | if (size < 0xd) { |
385 | count = -EINVAL; |
386 | goto out; |
387 | } |
388 | memset(req, 0, sizeof(*req)); |
389 | |
390 | size = min(sizeof(*req), size); |
391 | memcpy(req, info->buffer.pointer, size); |
392 | DRM_DEBUG_DRIVER("SBIOS pending requests: %#x\n" , req->pending); |
393 | |
394 | count = hweight32(req->pending); |
395 | |
396 | out: |
397 | kfree(info); |
398 | return count; |
399 | } |
400 | |
401 | /** |
402 | * amdgpu_atif_handler - handle ATIF notify requests |
403 | * |
404 | * @adev: amdgpu_device pointer |
405 | * @event: atif sbios request struct |
406 | * |
407 | * Checks the acpi event and if it matches an atif event, |
408 | * handles it. |
409 | * |
410 | * Returns: |
411 | * NOTIFY_BAD or NOTIFY_DONE, depending on the event. |
412 | */ |
413 | static int amdgpu_atif_handler(struct amdgpu_device *adev, |
414 | struct acpi_bus_event *event) |
415 | { |
416 | struct amdgpu_atif *atif = adev->atif; |
417 | int count; |
418 | |
419 | DRM_DEBUG_DRIVER("event, device_class = %s, type = %#x\n" , |
420 | event->device_class, event->type); |
421 | |
422 | if (strcmp(event->device_class, ACPI_VIDEO_CLASS) != 0) |
423 | return NOTIFY_DONE; |
424 | |
425 | /* Is this actually our event? */ |
426 | if (!atif || |
427 | !atif->notification_cfg.enabled || |
428 | event->type != atif->notification_cfg.command_code) { |
429 | /* These events will generate keypresses otherwise */ |
430 | if (event->type == ACPI_VIDEO_NOTIFY_PROBE) |
431 | return NOTIFY_BAD; |
432 | else |
433 | return NOTIFY_DONE; |
434 | } |
435 | |
436 | if (atif->functions.sbios_requests) { |
437 | struct atif_sbios_requests req; |
438 | |
439 | /* Check pending SBIOS requests */ |
440 | count = amdgpu_atif_get_sbios_requests(atif, &req); |
441 | |
442 | if (count <= 0) |
443 | return NOTIFY_BAD; |
444 | |
445 | DRM_DEBUG_DRIVER("ATIF: %d pending SBIOS requests\n" , count); |
446 | |
447 | /* todo: add DC handling */ |
448 | if ((req.pending & ATIF_PANEL_BRIGHTNESS_CHANGE_REQUEST) && |
449 | !amdgpu_device_has_dc_support(adev)) { |
450 | struct amdgpu_encoder *enc = atif->encoder_for_bl; |
451 | |
452 | if (enc) { |
453 | struct amdgpu_encoder_atom_dig *dig = enc->enc_priv; |
454 | |
455 | DRM_DEBUG_DRIVER("Changing brightness to %d\n" , |
456 | req.backlight_level); |
457 | |
458 | amdgpu_display_backlight_set_level(adev, enc, req.backlight_level); |
459 | |
460 | #if defined(CONFIG_BACKLIGHT_CLASS_DEVICE) || defined(CONFIG_BACKLIGHT_CLASS_DEVICE_MODULE) |
461 | backlight_force_update(dig->bl_dev, |
462 | BACKLIGHT_UPDATE_HOTKEY); |
463 | #endif |
464 | } |
465 | } |
466 | if (req.pending & ATIF_DGPU_DISPLAY_EVENT) { |
467 | if ((adev->flags & AMD_IS_PX) && |
468 | amdgpu_atpx_dgpu_req_power_for_displays()) { |
469 | pm_runtime_get_sync(adev->ddev->dev); |
470 | /* Just fire off a uevent and let userspace tell us what to do */ |
471 | drm_helper_hpd_irq_event(adev->ddev); |
472 | pm_runtime_mark_last_busy(adev->ddev->dev); |
473 | pm_runtime_put_autosuspend(adev->ddev->dev); |
474 | } |
475 | } |
476 | /* TODO: check other events */ |
477 | } |
478 | |
479 | /* We've handled the event, stop the notifier chain. The ACPI interface |
480 | * overloads ACPI_VIDEO_NOTIFY_PROBE, we don't want to send that to |
481 | * userspace if the event was generated only to signal a SBIOS |
482 | * request. |
483 | */ |
484 | return NOTIFY_BAD; |
485 | } |
486 | |
487 | /* Call the ATCS method |
488 | */ |
489 | /** |
490 | * amdgpu_atcs_call - call an ATCS method |
491 | * |
492 | * @handle: acpi handle |
493 | * @function: the ATCS function to execute |
494 | * @params: ATCS function params |
495 | * |
496 | * Executes the requested ATCS function (all asics). |
497 | * Returns a pointer to the acpi output buffer. |
498 | */ |
499 | static union acpi_object *amdgpu_atcs_call(acpi_handle handle, int function, |
500 | struct acpi_buffer *params) |
501 | { |
502 | acpi_status status; |
503 | union acpi_object atcs_arg_elements[2]; |
504 | struct acpi_object_list atcs_arg; |
505 | struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; |
506 | |
507 | atcs_arg.count = 2; |
508 | atcs_arg.pointer = &atcs_arg_elements[0]; |
509 | |
510 | atcs_arg_elements[0].type = ACPI_TYPE_INTEGER; |
511 | atcs_arg_elements[0].integer.value = function; |
512 | |
513 | if (params) { |
514 | atcs_arg_elements[1].type = ACPI_TYPE_BUFFER; |
515 | atcs_arg_elements[1].buffer.length = params->length; |
516 | atcs_arg_elements[1].buffer.pointer = params->pointer; |
517 | } else { |
518 | /* We need a second fake parameter */ |
519 | atcs_arg_elements[1].type = ACPI_TYPE_INTEGER; |
520 | atcs_arg_elements[1].integer.value = 0; |
521 | } |
522 | |
523 | status = acpi_evaluate_object(handle, "ATCS" , &atcs_arg, &buffer); |
524 | |
525 | /* Fail only if calling the method fails and ATIF is supported */ |
526 | if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) { |
527 | DRM_DEBUG_DRIVER("failed to evaluate ATCS got %s\n" , |
528 | acpi_format_exception(status)); |
529 | kfree(buffer.pointer); |
530 | return NULL; |
531 | } |
532 | |
533 | return buffer.pointer; |
534 | } |
535 | |
536 | /** |
537 | * amdgpu_atcs_parse_functions - parse supported functions |
538 | * |
539 | * @f: supported functions struct |
540 | * @mask: supported functions mask from ATCS |
541 | * |
542 | * Use the supported functions mask from ATCS function |
543 | * ATCS_FUNCTION_VERIFY_INTERFACE to determine what functions |
544 | * are supported (all asics). |
545 | */ |
546 | static void amdgpu_atcs_parse_functions(struct amdgpu_atcs_functions *f, u32 mask) |
547 | { |
548 | f->get_ext_state = mask & ATCS_GET_EXTERNAL_STATE_SUPPORTED; |
549 | f->pcie_perf_req = mask & ATCS_PCIE_PERFORMANCE_REQUEST_SUPPORTED; |
550 | f->pcie_dev_rdy = mask & ATCS_PCIE_DEVICE_READY_NOTIFICATION_SUPPORTED; |
551 | f->pcie_bus_width = mask & ATCS_SET_PCIE_BUS_WIDTH_SUPPORTED; |
552 | } |
553 | |
554 | /** |
555 | * amdgpu_atcs_verify_interface - verify ATCS |
556 | * |
557 | * @handle: acpi handle |
558 | * @atcs: amdgpu atcs struct |
559 | * |
560 | * Execute the ATCS_FUNCTION_VERIFY_INTERFACE ATCS function |
561 | * to initialize ATCS and determine what features are supported |
562 | * (all asics). |
563 | * returns 0 on success, error on failure. |
564 | */ |
565 | static int amdgpu_atcs_verify_interface(acpi_handle handle, |
566 | struct amdgpu_atcs *atcs) |
567 | { |
568 | union acpi_object *info; |
569 | struct atcs_verify_interface output; |
570 | size_t size; |
571 | int err = 0; |
572 | |
573 | info = amdgpu_atcs_call(handle, ATCS_FUNCTION_VERIFY_INTERFACE, NULL); |
574 | if (!info) |
575 | return -EIO; |
576 | |
577 | memset(&output, 0, sizeof(output)); |
578 | |
579 | size = *(u16 *) info->buffer.pointer; |
580 | if (size < 8) { |
581 | DRM_INFO("ATCS buffer is too small: %zu\n" , size); |
582 | err = -EINVAL; |
583 | goto out; |
584 | } |
585 | size = min(sizeof(output), size); |
586 | |
587 | memcpy(&output, info->buffer.pointer, size); |
588 | |
589 | /* TODO: check version? */ |
590 | DRM_DEBUG_DRIVER("ATCS version %u\n" , output.version); |
591 | |
592 | amdgpu_atcs_parse_functions(&atcs->functions, output.function_bits); |
593 | |
594 | out: |
595 | kfree(info); |
596 | return err; |
597 | } |
598 | |
599 | /** |
600 | * amdgpu_acpi_is_pcie_performance_request_supported |
601 | * |
602 | * @adev: amdgpu_device pointer |
603 | * |
604 | * Check if the ATCS pcie_perf_req and pcie_dev_rdy methods |
605 | * are supported (all asics). |
606 | * returns true if supported, false if not. |
607 | */ |
608 | bool amdgpu_acpi_is_pcie_performance_request_supported(struct amdgpu_device *adev) |
609 | { |
610 | struct amdgpu_atcs *atcs = &adev->atcs; |
611 | |
612 | if (atcs->functions.pcie_perf_req && atcs->functions.pcie_dev_rdy) |
613 | return true; |
614 | |
615 | return false; |
616 | } |
617 | |
618 | /** |
619 | * amdgpu_acpi_pcie_notify_device_ready |
620 | * |
621 | * @adev: amdgpu_device pointer |
622 | * |
623 | * Executes the PCIE_DEVICE_READY_NOTIFICATION method |
624 | * (all asics). |
625 | * returns 0 on success, error on failure. |
626 | */ |
627 | int amdgpu_acpi_pcie_notify_device_ready(struct amdgpu_device *adev) |
628 | { |
629 | acpi_handle handle; |
630 | union acpi_object *info; |
631 | struct amdgpu_atcs *atcs = &adev->atcs; |
632 | |
633 | /* Get the device handle */ |
634 | handle = ACPI_HANDLE(&adev->pdev->dev); |
635 | if (!handle) |
636 | return -EINVAL; |
637 | |
638 | if (!atcs->functions.pcie_dev_rdy) |
639 | return -EINVAL; |
640 | |
641 | info = amdgpu_atcs_call(handle, ATCS_FUNCTION_PCIE_DEVICE_READY_NOTIFICATION, NULL); |
642 | if (!info) |
643 | return -EIO; |
644 | |
645 | kfree(info); |
646 | |
647 | return 0; |
648 | } |
649 | |
650 | /** |
651 | * amdgpu_acpi_pcie_performance_request |
652 | * |
653 | * @adev: amdgpu_device pointer |
654 | * @perf_req: requested perf level (pcie gen speed) |
655 | * @advertise: set advertise caps flag if set |
656 | * |
657 | * Executes the PCIE_PERFORMANCE_REQUEST method to |
658 | * change the pcie gen speed (all asics). |
659 | * returns 0 on success, error on failure. |
660 | */ |
661 | int amdgpu_acpi_pcie_performance_request(struct amdgpu_device *adev, |
662 | u8 perf_req, bool advertise) |
663 | { |
664 | acpi_handle handle; |
665 | union acpi_object *info; |
666 | struct amdgpu_atcs *atcs = &adev->atcs; |
667 | struct atcs_pref_req_input atcs_input; |
668 | struct atcs_pref_req_output atcs_output; |
669 | struct acpi_buffer params; |
670 | size_t size; |
671 | u32 retry = 3; |
672 | |
673 | if (amdgpu_acpi_pcie_notify_device_ready(adev)) |
674 | return -EINVAL; |
675 | |
676 | /* Get the device handle */ |
677 | handle = ACPI_HANDLE(&adev->pdev->dev); |
678 | if (!handle) |
679 | return -EINVAL; |
680 | |
681 | if (!atcs->functions.pcie_perf_req) |
682 | return -EINVAL; |
683 | |
684 | atcs_input.size = sizeof(struct atcs_pref_req_input); |
685 | /* client id (bit 2-0: func num, 7-3: dev num, 15-8: bus num) */ |
686 | atcs_input.client_id = adev->pdev->devfn | (adev->pdev->bus->number << 8); |
687 | atcs_input.valid_flags_mask = ATCS_VALID_FLAGS_MASK; |
688 | atcs_input.flags = ATCS_WAIT_FOR_COMPLETION; |
689 | if (advertise) |
690 | atcs_input.flags |= ATCS_ADVERTISE_CAPS; |
691 | atcs_input.req_type = ATCS_PCIE_LINK_SPEED; |
692 | atcs_input.perf_req = perf_req; |
693 | |
694 | params.length = sizeof(struct atcs_pref_req_input); |
695 | params.pointer = &atcs_input; |
696 | |
697 | while (retry--) { |
698 | info = amdgpu_atcs_call(handle, ATCS_FUNCTION_PCIE_PERFORMANCE_REQUEST, ¶ms); |
699 | if (!info) |
700 | return -EIO; |
701 | |
702 | memset(&atcs_output, 0, sizeof(atcs_output)); |
703 | |
704 | size = *(u16 *) info->buffer.pointer; |
705 | if (size < 3) { |
706 | DRM_INFO("ATCS buffer is too small: %zu\n" , size); |
707 | kfree(info); |
708 | return -EINVAL; |
709 | } |
710 | size = min(sizeof(atcs_output), size); |
711 | |
712 | memcpy(&atcs_output, info->buffer.pointer, size); |
713 | |
714 | kfree(info); |
715 | |
716 | switch (atcs_output.ret_val) { |
717 | case ATCS_REQUEST_REFUSED: |
718 | default: |
719 | return -EINVAL; |
720 | case ATCS_REQUEST_COMPLETE: |
721 | return 0; |
722 | case ATCS_REQUEST_IN_PROGRESS: |
723 | udelay(10); |
724 | break; |
725 | } |
726 | } |
727 | |
728 | return 0; |
729 | } |
730 | |
731 | /** |
732 | * amdgpu_acpi_event - handle notify events |
733 | * |
734 | * @nb: notifier block |
735 | * @val: val |
736 | * @data: acpi event |
737 | * |
738 | * Calls relevant amdgpu functions in response to various |
739 | * acpi events. |
740 | * Returns NOTIFY code |
741 | */ |
742 | static int amdgpu_acpi_event(struct notifier_block *nb, |
743 | unsigned long val, |
744 | void *data) |
745 | { |
746 | struct amdgpu_device *adev = container_of(nb, struct amdgpu_device, acpi_nb); |
747 | struct acpi_bus_event *entry = (struct acpi_bus_event *)data; |
748 | |
749 | if (strcmp(entry->device_class, ACPI_AC_CLASS) == 0) { |
750 | if (power_supply_is_system_supplied() > 0) |
751 | DRM_DEBUG_DRIVER("pm: AC\n" ); |
752 | else |
753 | DRM_DEBUG_DRIVER("pm: DC\n" ); |
754 | |
755 | amdgpu_pm_acpi_event_handler(adev); |
756 | } |
757 | |
758 | /* Check for pending SBIOS requests */ |
759 | return amdgpu_atif_handler(adev, entry); |
760 | } |
761 | |
762 | /* Call all ACPI methods here */ |
763 | /** |
764 | * amdgpu_acpi_init - init driver acpi support |
765 | * |
766 | * @adev: amdgpu_device pointer |
767 | * |
768 | * Verifies the AMD ACPI interfaces and registers with the acpi |
769 | * notifier chain (all asics). |
770 | * Returns 0 on success, error on failure. |
771 | */ |
772 | int amdgpu_acpi_init(struct amdgpu_device *adev) |
773 | { |
774 | acpi_handle handle, atif_handle; |
775 | struct amdgpu_atif *atif; |
776 | struct amdgpu_atcs *atcs = &adev->atcs; |
777 | int ret; |
778 | |
779 | /* Get the device handle */ |
780 | handle = ACPI_HANDLE(&adev->pdev->dev); |
781 | |
782 | if (!adev->bios || !handle) |
783 | return 0; |
784 | |
785 | /* Call the ATCS method */ |
786 | ret = amdgpu_atcs_verify_interface(handle, atcs); |
787 | if (ret) { |
788 | DRM_DEBUG_DRIVER("Call to ATCS verify_interface failed: %d\n" , ret); |
789 | } |
790 | |
791 | /* Probe for ATIF, and initialize it if found */ |
792 | atif_handle = amdgpu_atif_probe_handle(handle); |
793 | if (!atif_handle) |
794 | goto out; |
795 | |
796 | atif = kzalloc(sizeof(*atif), GFP_KERNEL); |
797 | if (!atif) { |
798 | DRM_WARN("Not enough memory to initialize ATIF\n" ); |
799 | goto out; |
800 | } |
801 | atif->handle = atif_handle; |
802 | |
803 | /* Call the ATIF method */ |
804 | ret = amdgpu_atif_verify_interface(atif); |
805 | if (ret) { |
806 | DRM_DEBUG_DRIVER("Call to ATIF verify_interface failed: %d\n" , ret); |
807 | kfree(atif); |
808 | goto out; |
809 | } |
810 | adev->atif = atif; |
811 | |
812 | if (atif->notifications.brightness_change) { |
813 | struct drm_encoder *tmp; |
814 | |
815 | /* Find the encoder controlling the brightness */ |
816 | list_for_each_entry(tmp, &adev->ddev->mode_config.encoder_list, |
817 | head) { |
818 | struct amdgpu_encoder *enc = to_amdgpu_encoder(tmp); |
819 | |
820 | if ((enc->devices & (ATOM_DEVICE_LCD_SUPPORT)) && |
821 | enc->enc_priv) { |
822 | struct amdgpu_encoder_atom_dig *dig = enc->enc_priv; |
823 | if (dig->bl_dev) { |
824 | atif->encoder_for_bl = enc; |
825 | break; |
826 | } |
827 | } |
828 | } |
829 | } |
830 | |
831 | if (atif->functions.sbios_requests && !atif->functions.system_params) { |
832 | /* XXX check this workraround, if sbios request function is |
833 | * present we have to see how it's configured in the system |
834 | * params |
835 | */ |
836 | atif->functions.system_params = true; |
837 | } |
838 | |
839 | if (atif->functions.system_params) { |
840 | ret = amdgpu_atif_get_notification_params(atif); |
841 | if (ret) { |
842 | DRM_DEBUG_DRIVER("Call to GET_SYSTEM_PARAMS failed: %d\n" , |
843 | ret); |
844 | /* Disable notification */ |
845 | atif->notification_cfg.enabled = false; |
846 | } |
847 | } |
848 | |
849 | if (atif->functions.query_backlight_transfer_characteristics) { |
850 | ret = amdgpu_atif_query_backlight_caps(atif); |
851 | if (ret) { |
852 | DRM_DEBUG_DRIVER("Call to QUERY_BACKLIGHT_TRANSFER_CHARACTERISTICS failed: %d\n" , |
853 | ret); |
854 | atif->backlight_caps.caps_valid = false; |
855 | } |
856 | } else { |
857 | atif->backlight_caps.caps_valid = false; |
858 | } |
859 | |
860 | out: |
861 | adev->acpi_nb.notifier_call = amdgpu_acpi_event; |
862 | register_acpi_notifier(&adev->acpi_nb); |
863 | |
864 | return ret; |
865 | } |
866 | |
867 | void amdgpu_acpi_get_backlight_caps(struct amdgpu_device *adev, |
868 | struct amdgpu_dm_backlight_caps *caps) |
869 | { |
870 | if (!adev->atif) { |
871 | caps->caps_valid = false; |
872 | return; |
873 | } |
874 | caps->caps_valid = adev->atif->backlight_caps.caps_valid; |
875 | caps->min_input_signal = adev->atif->backlight_caps.min_input_signal; |
876 | caps->max_input_signal = adev->atif->backlight_caps.max_input_signal; |
877 | } |
878 | |
879 | /** |
880 | * amdgpu_acpi_fini - tear down driver acpi support |
881 | * |
882 | * @adev: amdgpu_device pointer |
883 | * |
884 | * Unregisters with the acpi notifier chain (all asics). |
885 | */ |
886 | void amdgpu_acpi_fini(struct amdgpu_device *adev) |
887 | { |
888 | unregister_acpi_notifier(&adev->acpi_nb); |
889 | kfree(adev->atif); |
890 | } |
891 | |