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d38ceaf9 AD |
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> | |
d38ceaf9 AD |
28 | #include <acpi/video.h> |
29 | #include <drm/drmP.h> | |
30 | #include <drm/drm_crtc_helper.h> | |
31 | #include "amdgpu.h" | |
32 | #include "amdgpu_acpi.h" | |
33 | #include "atom.h" | |
34 | ||
d38ceaf9 | 35 | extern void amdgpu_pm_acpi_event_handler(struct amdgpu_device *adev); |
d38ceaf9 AD |
36 | /* Call the ATIF method |
37 | */ | |
38 | /** | |
39 | * amdgpu_atif_call - call an ATIF method | |
40 | * | |
41 | * @handle: acpi handle | |
42 | * @function: the ATIF function to execute | |
43 | * @params: ATIF function params | |
44 | * | |
45 | * Executes the requested ATIF function (all asics). | |
46 | * Returns a pointer to the acpi output buffer. | |
47 | */ | |
48 | static 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 | /* We need a second fake parameter */ | |
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 | /* Fail only if calling the method fails and ATIF is supported */ | |
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 | * amdgpu_atif_parse_notification - parse supported notifications | |
87 | * | |
88 | * @n: supported notifications struct | |
89 | * @mask: supported notifications mask from ATIF | |
90 | * | |
91 | * Use the supported notifications mask from ATIF function | |
92 | * ATIF_FUNCTION_VERIFY_INTERFACE to determine what notifications | |
93 | * are supported (all asics). | |
94 | */ | |
95 | static 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 | * amdgpu_atif_parse_functions - parse supported functions | |
110 | * | |
111 | * @f: supported functions struct | |
112 | * @mask: supported functions mask from ATIF | |
113 | * | |
114 | * Use the supported functions mask from ATIF function | |
115 | * ATIF_FUNCTION_VERIFY_INTERFACE to determine what functions | |
116 | * are supported (all asics). | |
117 | */ | |
118 | static 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 | } | |
131 | ||
132 | /** | |
133 | * amdgpu_atif_verify_interface - verify ATIF | |
134 | * | |
135 | * @handle: acpi handle | |
136 | * @atif: amdgpu atif struct | |
137 | * | |
138 | * Execute the ATIF_FUNCTION_VERIFY_INTERFACE ATIF function | |
139 | * to initialize ATIF and determine what features are supported | |
140 | * (all asics). | |
141 | * returns 0 on success, error on failure. | |
142 | */ | |
143 | static 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 | /* TODO: check version? */ | |
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 | ||
173 | out: | |
174 | kfree(info); | |
175 | return err; | |
176 | } | |
177 | ||
178 | /** | |
179 | * amdgpu_atif_get_notification_params - determine notify configuration | |
180 | * | |
181 | * @handle: acpi handle | |
182 | * @n: atif notification configuration struct | |
183 | * | |
184 | * Execute the ATIF_FUNCTION_GET_SYSTEM_PARAMETERS ATIF function | |
185 | * to determine if a notifier is used and if so which one | |
186 | * (all asics). This is either Notify(VGA, 0x81) or Notify(VGA, n) | |
187 | * where n is specified in the result if a notifier is used. | |
188 | * Returns 0 on success, error on failure. | |
189 | */ | |
190 | static 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 | ||
233 | out: | |
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 | ||
241 | /** | |
242 | * amdgpu_atif_get_sbios_requests - get requested sbios event | |
243 | * | |
244 | * @handle: acpi handle | |
245 | * @req: atif sbios request struct | |
246 | * | |
247 | * Execute the ATIF_FUNCTION_GET_SYSTEM_BIOS_REQUESTS ATIF function | |
248 | * to determine what requests the sbios is making to the driver | |
249 | * (all asics). | |
250 | * Returns 0 on success, error on failure. | |
251 | */ | |
252 | static 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 | ||
276 | out: | |
277 | kfree(info); | |
278 | return count; | |
279 | } | |
280 | ||
281 | /** | |
282 | * amdgpu_atif_handler - handle ATIF notify requests | |
283 | * | |
284 | * @adev: amdgpu_device pointer | |
285 | * @event: atif sbios request struct | |
286 | * | |
287 | * Checks the acpi event and if it matches an atif event, | |
288 | * handles it. | |
289 | * Returns NOTIFY code | |
290 | */ | |
291 | int 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 | /* Not our event */ | |
308 | return NOTIFY_DONE; | |
309 | ||
310 | /* Check pending SBIOS requests */ | |
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 | } | |
336 | /* TODO: check other events */ | |
337 | ||
338 | /* We've handled the event, stop the notifier chain. The ACPI interface | |
339 | * overloads ACPI_VIDEO_NOTIFY_PROBE, we don't want to send that to | |
340 | * userspace if the event was generated only to signal a SBIOS | |
341 | * request. | |
342 | */ | |
343 | return NOTIFY_BAD; | |
344 | } | |
345 | ||
346 | /* Call the ATCS method | |
347 | */ | |
348 | /** | |
349 | * amdgpu_atcs_call - call an ATCS method | |
350 | * | |
351 | * @handle: acpi handle | |
352 | * @function: the ATCS function to execute | |
353 | * @params: ATCS function params | |
354 | * | |
355 | * Executes the requested ATCS function (all asics). | |
356 | * Returns a pointer to the acpi output buffer. | |
357 | */ | |
358 | static 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 | /* We need a second fake parameter */ | |
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 | /* Fail only if calling the method fails and ATIF is supported */ | |
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 | } | |
394 | ||
395 | /** | |
396 | * amdgpu_atcs_parse_functions - parse supported functions | |
397 | * | |
398 | * @f: supported functions struct | |
399 | * @mask: supported functions mask from ATCS | |
400 | * | |
401 | * Use the supported functions mask from ATCS function | |
402 | * ATCS_FUNCTION_VERIFY_INTERFACE to determine what functions | |
403 | * are supported (all asics). | |
404 | */ | |
405 | static 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 | } | |
412 | ||
413 | /** | |
414 | * amdgpu_atcs_verify_interface - verify ATCS | |
415 | * | |
416 | * @handle: acpi handle | |
417 | * @atcs: amdgpu atcs struct | |
418 | * | |
419 | * Execute the ATCS_FUNCTION_VERIFY_INTERFACE ATCS function | |
420 | * to initialize ATCS and determine what features are supported | |
421 | * (all asics). | |
422 | * returns 0 on success, error on failure. | |
423 | */ | |
424 | static 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 | /* TODO: check version? */ | |
449 | DRM_DEBUG_DRIVER("ATCS version %u\n", output.version); | |
450 | ||
451 | amdgpu_atcs_parse_functions(&atcs->functions, output.function_bits); | |
452 | ||
453 | out: | |
454 | kfree(info); | |
455 | return err; | |
456 | } | |
457 | ||
458 | /** | |
459 | * amdgpu_acpi_is_pcie_performance_request_supported | |
460 | * | |
461 | * @adev: amdgpu_device pointer | |
462 | * | |
463 | * Check if the ATCS pcie_perf_req and pcie_dev_rdy methods | |
464 | * are supported (all asics). | |
465 | * returns true if supported, false if not. | |
466 | */ | |
467 | bool 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 | ||
477 | /** | |
478 | * amdgpu_acpi_pcie_notify_device_ready | |
479 | * | |
480 | * @adev: amdgpu_device pointer | |
481 | * | |
482 | * Executes the PCIE_DEVICE_READY_NOTIFICATION method | |
483 | * (all asics). | |
484 | * returns 0 on success, error on failure. | |
485 | */ | |
486 | int 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 | /* Get the device handle */ | |
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 | ||
509 | /** | |
510 | * amdgpu_acpi_pcie_performance_request | |
511 | * | |
512 | * @adev: amdgpu_device pointer | |
513 | * @perf_req: requested perf level (pcie gen speed) | |
514 | * @advertise: set advertise caps flag if set | |
515 | * | |
516 | * Executes the PCIE_PERFORMANCE_REQUEST method to | |
517 | * change the pcie gen speed (all asics). | |
518 | * returns 0 on success, error on failure. | |
519 | */ | |
520 | int 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 | /* Get the device handle */ | |
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 | /* client id (bit 2-0: func num, 7-3: dev num, 15-8: bus num) */ | |
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 | ||
587 | /** | |
588 | * amdgpu_acpi_event - handle notify events | |
589 | * | |
590 | * @nb: notifier block | |
591 | * @val: val | |
592 | * @data: acpi event | |
593 | * | |
594 | * Calls relevant amdgpu functions in response to various | |
595 | * acpi events. | |
596 | * Returns NOTIFY code | |
597 | */ | |
598 | static 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 | /* Check for pending SBIOS requests */ | |
615 | return amdgpu_atif_handler(adev, entry); | |
616 | } | |
617 | ||
618 | /* Call all ACPI methods here */ | |
619 | /** | |
620 | * amdgpu_acpi_init - init driver acpi support | |
621 | * | |
622 | * @adev: amdgpu_device pointer | |
623 | * | |
624 | * Verifies the AMD ACPI interfaces and registers with the acpi | |
625 | * notifier chain (all asics). | |
626 | * Returns 0 on success, error on failure. | |
627 | */ | |
628 | int 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 | /* Get the device handle */ | |
636 | handle = ACPI_HANDLE(&adev->pdev->dev); | |
637 | ||
638 | if (!adev->bios || !handle) | |
639 | return 0; | |
640 | ||
641 | /* Call the ATCS method */ | |
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 | /* Call the ATIF method */ | |
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 | /* Find the encoder controlling the brightness */ | |
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 | /* XXX check this workraround, if sbios request function is | |
677 | * present we have to see how it's configured in the system | |
678 | * params | |
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 | /* Disable notification */ | |
690 | atif->notification_cfg.enabled = false; | |
691 | } | |
692 | } | |
693 | ||
694 | out: | |
695 | adev->acpi_nb.notifier_call = amdgpu_acpi_event; | |
696 | register_acpi_notifier(&adev->acpi_nb); | |
697 | ||
698 | return ret; | |
699 | } | |
700 | ||
701 | /** | |
702 | * amdgpu_acpi_fini - tear down driver acpi support | |
703 | * | |
704 | * @adev: amdgpu_device pointer | |
705 | * | |
706 | * Unregisters with the acpi notifier chain (all asics). | |
707 | */ | |
708 | void amdgpu_acpi_fini(struct amdgpu_device *adev) | |
709 | { | |
710 | unregister_acpi_notifier(&adev->acpi_nb); | |
711 | } |