Commit | Line | Data |
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efd4e418 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 | ||
d7a2952f AM |
24 | #include <linux/pci.h> |
25 | #include <linux/acpi.h> | |
26 | #include <linux/slab.h> | |
c4917074 | 27 | #include <linux/power_supply.h> |
d7a2952f AM |
28 | #include <acpi/acpi_drivers.h> |
29 | #include <acpi/acpi_bus.h> | |
fda4b25c | 30 | #include <acpi/video.h> |
d7a2952f AM |
31 | |
32 | #include "drmP.h" | |
33 | #include "drm.h" | |
34 | #include "drm_sarea.h" | |
35 | #include "drm_crtc_helper.h" | |
36 | #include "radeon.h" | |
9e05b2f4 | 37 | #include "radeon_acpi.h" |
fda4b25c | 38 | #include "atom.h" |
d7a2952f AM |
39 | |
40 | #include <linux/vga_switcheroo.h> | |
41 | ||
c4917074 AD |
42 | #define ACPI_AC_CLASS "ac_adapter" |
43 | ||
44 | extern void radeon_pm_acpi_event_handler(struct radeon_device *rdev); | |
45 | ||
fd64ca8a LT |
46 | struct atif_verify_interface { |
47 | u16 size; /* structure size in bytes (includes size field) */ | |
48 | u16 version; /* version */ | |
49 | u32 notification_mask; /* supported notifications mask */ | |
50 | u32 function_bits; /* supported functions bit vector */ | |
51 | } __packed; | |
52 | ||
ce3cf821 | 53 | struct atif_system_params { |
fda4b25c LT |
54 | u16 size; /* structure size in bytes (includes size field) */ |
55 | u32 valid_mask; /* valid flags mask */ | |
56 | u32 flags; /* flags */ | |
57 | u8 command_code; /* notify command code */ | |
58 | } __packed; | |
59 | ||
60 | struct atif_sbios_requests { | |
61 | u16 size; /* structure size in bytes (includes size field) */ | |
62 | u32 pending; /* pending sbios requests */ | |
63 | u8 panel_exp_mode; /* panel expansion mode */ | |
64 | u8 thermal_gfx; /* thermal state: target gfx controller */ | |
65 | u8 thermal_state; /* thermal state: state id (0: exit state, non-0: state) */ | |
66 | u8 forced_power_gfx; /* forced power state: target gfx controller */ | |
67 | u8 forced_power_state; /* forced power state: state id */ | |
68 | u8 system_power_src; /* system power source */ | |
69 | u8 backlight_level; /* panel backlight level (0-255) */ | |
ce3cf821 LT |
70 | } __packed; |
71 | ||
72 | #define ATIF_NOTIFY_MASK 0x3 | |
73 | #define ATIF_NOTIFY_NONE 0 | |
74 | #define ATIF_NOTIFY_81 1 | |
75 | #define ATIF_NOTIFY_N 2 | |
76 | ||
d7a2952f | 77 | /* Call the ATIF method |
d7a2952f | 78 | */ |
c3c65160 AD |
79 | /** |
80 | * radeon_atif_call - call an ATIF method | |
81 | * | |
82 | * @handle: acpi handle | |
83 | * @function: the ATIF function to execute | |
84 | * @params: ATIF function params | |
85 | * | |
86 | * Executes the requested ATIF function (all asics). | |
87 | * Returns a pointer to the acpi output buffer. | |
88 | */ | |
86504672 LT |
89 | static union acpi_object *radeon_atif_call(acpi_handle handle, int function, |
90 | struct acpi_buffer *params) | |
d7a2952f AM |
91 | { |
92 | acpi_status status; | |
93 | union acpi_object atif_arg_elements[2]; | |
94 | struct acpi_object_list atif_arg; | |
86504672 | 95 | struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; |
d7a2952f AM |
96 | |
97 | atif_arg.count = 2; | |
98 | atif_arg.pointer = &atif_arg_elements[0]; | |
99 | ||
100 | atif_arg_elements[0].type = ACPI_TYPE_INTEGER; | |
86504672 LT |
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 | } | |
d7a2952f AM |
112 | |
113 | status = acpi_evaluate_object(handle, "ATIF", &atif_arg, &buffer); | |
114 | ||
115 | /* Fail only if calling the method fails and ATIF is supported */ | |
116 | if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) { | |
bc96f942 JD |
117 | DRM_DEBUG_DRIVER("failed to evaluate ATIF got %s\n", |
118 | acpi_format_exception(status)); | |
d7a2952f | 119 | kfree(buffer.pointer); |
86504672 | 120 | return NULL; |
d7a2952f AM |
121 | } |
122 | ||
86504672 | 123 | return buffer.pointer; |
d7a2952f AM |
124 | } |
125 | ||
c3c65160 AD |
126 | /** |
127 | * radeon_atif_parse_notification - parse supported notifications | |
128 | * | |
129 | * @n: supported notifications struct | |
130 | * @mask: supported notifications mask from ATIF | |
131 | * | |
132 | * Use the supported notifications mask from ATIF function | |
133 | * ATIF_FUNCTION_VERIFY_INTERFACE to determine what notifications | |
134 | * are supported (all asics). | |
135 | */ | |
fd64ca8a LT |
136 | static void radeon_atif_parse_notification(struct radeon_atif_notifications *n, u32 mask) |
137 | { | |
138 | n->display_switch = mask & ATIF_DISPLAY_SWITCH_REQUEST_SUPPORTED; | |
139 | n->expansion_mode_change = mask & ATIF_EXPANSION_MODE_CHANGE_REQUEST_SUPPORTED; | |
140 | n->thermal_state = mask & ATIF_THERMAL_STATE_CHANGE_REQUEST_SUPPORTED; | |
141 | n->forced_power_state = mask & ATIF_FORCED_POWER_STATE_CHANGE_REQUEST_SUPPORTED; | |
142 | n->system_power_state = mask & ATIF_SYSTEM_POWER_SOURCE_CHANGE_REQUEST_SUPPORTED; | |
143 | n->display_conf_change = mask & ATIF_DISPLAY_CONF_CHANGE_REQUEST_SUPPORTED; | |
144 | n->px_gfx_switch = mask & ATIF_PX_GFX_SWITCH_REQUEST_SUPPORTED; | |
145 | n->brightness_change = mask & ATIF_PANEL_BRIGHTNESS_CHANGE_REQUEST_SUPPORTED; | |
146 | n->dgpu_display_event = mask & ATIF_DGPU_DISPLAY_EVENT_SUPPORTED; | |
147 | } | |
148 | ||
c3c65160 AD |
149 | /** |
150 | * radeon_atif_parse_functions - parse supported functions | |
151 | * | |
152 | * @f: supported functions struct | |
153 | * @mask: supported functions mask from ATIF | |
154 | * | |
155 | * Use the supported functions mask from ATIF function | |
156 | * ATIF_FUNCTION_VERIFY_INTERFACE to determine what functions | |
157 | * are supported (all asics). | |
158 | */ | |
fd64ca8a LT |
159 | static void radeon_atif_parse_functions(struct radeon_atif_functions *f, u32 mask) |
160 | { | |
161 | f->system_params = mask & ATIF_GET_SYSTEM_PARAMETERS_SUPPORTED; | |
162 | f->sbios_requests = mask & ATIF_GET_SYSTEM_BIOS_REQUESTS_SUPPORTED; | |
163 | f->select_active_disp = mask & ATIF_SELECT_ACTIVE_DISPLAYS_SUPPORTED; | |
164 | f->lid_state = mask & ATIF_GET_LID_STATE_SUPPORTED; | |
165 | f->get_tv_standard = mask & ATIF_GET_TV_STANDARD_FROM_CMOS_SUPPORTED; | |
166 | f->set_tv_standard = mask & ATIF_SET_TV_STANDARD_IN_CMOS_SUPPORTED; | |
167 | f->get_panel_expansion_mode = mask & ATIF_GET_PANEL_EXPANSION_MODE_FROM_CMOS_SUPPORTED; | |
168 | f->set_panel_expansion_mode = mask & ATIF_SET_PANEL_EXPANSION_MODE_IN_CMOS_SUPPORTED; | |
169 | f->temperature_change = mask & ATIF_TEMPERATURE_CHANGE_NOTIFICATION_SUPPORTED; | |
170 | f->graphics_device_types = mask & ATIF_GET_GRAPHICS_DEVICE_TYPES_SUPPORTED; | |
171 | } | |
172 | ||
c3c65160 AD |
173 | /** |
174 | * radeon_atif_verify_interface - verify ATIF | |
175 | * | |
176 | * @handle: acpi handle | |
177 | * @atif: radeon atif struct | |
178 | * | |
179 | * Execute the ATIF_FUNCTION_VERIFY_INTERFACE ATIF function | |
180 | * to initialize ATIF and determine what features are supported | |
181 | * (all asics). | |
182 | * returns 0 on success, error on failure. | |
183 | */ | |
fd64ca8a LT |
184 | static int radeon_atif_verify_interface(acpi_handle handle, |
185 | struct radeon_atif *atif) | |
186 | { | |
187 | union acpi_object *info; | |
188 | struct atif_verify_interface output; | |
189 | size_t size; | |
190 | int err = 0; | |
191 | ||
192 | info = radeon_atif_call(handle, 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: %lu\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 | radeon_atif_parse_notification(&atif->notifications, output.notification_mask); | |
212 | radeon_atif_parse_functions(&atif->functions, output.function_bits); | |
213 | ||
214 | out: | |
215 | kfree(info); | |
216 | return err; | |
217 | } | |
218 | ||
c3c65160 AD |
219 | /** |
220 | * radeon_atif_get_notification_params - determine notify configuration | |
221 | * | |
222 | * @handle: acpi handle | |
223 | * @n: atif notification configuration struct | |
224 | * | |
225 | * Execute the ATIF_FUNCTION_GET_SYSTEM_PARAMETERS ATIF function | |
226 | * to determine if a notifier is used and if so which one | |
227 | * (all asics). This is either Notify(VGA, 0x81) or Notify(VGA, n) | |
228 | * where n is specified in the result if a notifier is used. | |
229 | * Returns 0 on success, error on failure. | |
230 | */ | |
ce3cf821 LT |
231 | static int radeon_atif_get_notification_params(acpi_handle handle, |
232 | struct radeon_atif_notification_cfg *n) | |
233 | { | |
234 | union acpi_object *info; | |
235 | struct atif_system_params params; | |
236 | size_t size; | |
237 | int err = 0; | |
238 | ||
239 | info = radeon_atif_call(handle, ATIF_FUNCTION_GET_SYSTEM_PARAMETERS, NULL); | |
240 | if (!info) { | |
241 | err = -EIO; | |
242 | goto out; | |
243 | } | |
244 | ||
245 | size = *(u16 *) info->buffer.pointer; | |
246 | if (size < 10) { | |
247 | err = -EINVAL; | |
248 | goto out; | |
249 | } | |
250 | ||
251 | memset(¶ms, 0, sizeof(params)); | |
252 | size = min(sizeof(params), size); | |
253 | memcpy(¶ms, info->buffer.pointer, size); | |
254 | ||
fda4b25c LT |
255 | DRM_DEBUG_DRIVER("SYSTEM_PARAMS: mask = %#x, flags = %#x\n", |
256 | params.flags, params.valid_mask); | |
ce3cf821 LT |
257 | params.flags = params.flags & params.valid_mask; |
258 | ||
259 | if ((params.flags & ATIF_NOTIFY_MASK) == ATIF_NOTIFY_NONE) { | |
260 | n->enabled = false; | |
261 | n->command_code = 0; | |
262 | } else if ((params.flags & ATIF_NOTIFY_MASK) == ATIF_NOTIFY_81) { | |
263 | n->enabled = true; | |
264 | n->command_code = 0x81; | |
265 | } else { | |
266 | if (size < 11) { | |
267 | err = -EINVAL; | |
268 | goto out; | |
269 | } | |
270 | n->enabled = true; | |
271 | n->command_code = params.command_code; | |
272 | } | |
273 | ||
274 | out: | |
fda4b25c LT |
275 | DRM_DEBUG_DRIVER("Notification %s, command code = %#x\n", |
276 | (n->enabled ? "enabled" : "disabled"), | |
277 | n->command_code); | |
ce3cf821 LT |
278 | kfree(info); |
279 | return err; | |
280 | } | |
281 | ||
c3c65160 AD |
282 | /** |
283 | * radeon_atif_get_sbios_requests - get requested sbios event | |
284 | * | |
285 | * @handle: acpi handle | |
286 | * @req: atif sbios request struct | |
287 | * | |
288 | * Execute the ATIF_FUNCTION_GET_SYSTEM_BIOS_REQUESTS ATIF function | |
289 | * to determine what requests the sbios is making to the driver | |
290 | * (all asics). | |
291 | * Returns 0 on success, error on failure. | |
292 | */ | |
fda4b25c LT |
293 | static int radeon_atif_get_sbios_requests(acpi_handle handle, |
294 | struct atif_sbios_requests *req) | |
295 | { | |
296 | union acpi_object *info; | |
297 | size_t size; | |
298 | int count = 0; | |
299 | ||
300 | info = radeon_atif_call(handle, ATIF_FUNCTION_GET_SYSTEM_BIOS_REQUESTS, NULL); | |
301 | if (!info) | |
302 | return -EIO; | |
303 | ||
304 | size = *(u16 *)info->buffer.pointer; | |
305 | if (size < 0xd) { | |
306 | count = -EINVAL; | |
307 | goto out; | |
308 | } | |
309 | memset(req, 0, sizeof(*req)); | |
310 | ||
311 | size = min(sizeof(*req), size); | |
312 | memcpy(req, info->buffer.pointer, size); | |
313 | DRM_DEBUG_DRIVER("SBIOS pending requests: %#x\n", req->pending); | |
314 | ||
315 | count = hweight32(req->pending); | |
316 | ||
317 | out: | |
318 | kfree(info); | |
319 | return count; | |
320 | } | |
321 | ||
c3c65160 AD |
322 | /** |
323 | * radeon_atif_handler - handle ATIF notify requests | |
324 | * | |
325 | * @rdev: radeon_device pointer | |
326 | * @event: atif sbios request struct | |
327 | * | |
328 | * Checks the acpi event and if it matches an atif event, | |
329 | * handles it. | |
330 | * Returns NOTIFY code | |
331 | */ | |
fda4b25c LT |
332 | int radeon_atif_handler(struct radeon_device *rdev, |
333 | struct acpi_bus_event *event) | |
334 | { | |
335 | struct radeon_atif *atif = &rdev->atif; | |
336 | struct atif_sbios_requests req; | |
337 | acpi_handle handle; | |
338 | int count; | |
339 | ||
340 | DRM_DEBUG_DRIVER("event, device_class = %s, type = %#x\n", | |
341 | event->device_class, event->type); | |
342 | ||
343 | if (strcmp(event->device_class, ACPI_VIDEO_CLASS) != 0) | |
344 | return NOTIFY_DONE; | |
345 | ||
346 | if (!atif->notification_cfg.enabled || | |
347 | event->type != atif->notification_cfg.command_code) | |
348 | /* Not our event */ | |
349 | return NOTIFY_DONE; | |
350 | ||
351 | /* Check pending SBIOS requests */ | |
352 | handle = DEVICE_ACPI_HANDLE(&rdev->pdev->dev); | |
353 | count = radeon_atif_get_sbios_requests(handle, &req); | |
354 | ||
355 | if (count <= 0) | |
356 | return NOTIFY_DONE; | |
357 | ||
358 | DRM_DEBUG_DRIVER("ATIF: %d pending SBIOS requests\n", count); | |
359 | ||
360 | if (req.pending & ATIF_PANEL_BRIGHTNESS_CHANGE_REQUEST) { | |
361 | struct radeon_encoder *enc = atif->backlight_ctl; | |
362 | ||
363 | if (enc) { | |
364 | struct radeon_encoder_atom_dig *dig = enc->enc_priv; | |
365 | dig->backlight_level = req.backlight_level; | |
366 | ||
367 | DRM_DEBUG_DRIVER("Changing brightness to %d\n", | |
368 | req.backlight_level); | |
369 | ||
370 | atombios_set_panel_brightness(enc); | |
371 | ||
372 | backlight_force_update(dig->bl_dev, | |
373 | BACKLIGHT_UPDATE_HOTKEY); | |
374 | } | |
375 | } | |
376 | /* TODO: check other events */ | |
377 | ||
92fdf89a LT |
378 | /* We've handled the event, stop the notifier chain. The ACPI interface |
379 | * overloads ACPI_VIDEO_NOTIFY_PROBE, we don't want to send that to | |
380 | * userspace if the event was generated only to signal a SBIOS | |
381 | * request. | |
382 | */ | |
383 | return NOTIFY_BAD; | |
fda4b25c LT |
384 | } |
385 | ||
c3c65160 AD |
386 | /** |
387 | * radeon_acpi_event - handle notify events | |
388 | * | |
389 | * @nb: notifier block | |
390 | * @val: val | |
391 | * @data: acpi event | |
392 | * | |
393 | * Calls relevant radeon functions in response to various | |
394 | * acpi events. | |
395 | * Returns NOTIFY code | |
396 | */ | |
c4917074 AD |
397 | static int radeon_acpi_event(struct notifier_block *nb, |
398 | unsigned long val, | |
399 | void *data) | |
400 | { | |
401 | struct radeon_device *rdev = container_of(nb, struct radeon_device, acpi_nb); | |
402 | struct acpi_bus_event *entry = (struct acpi_bus_event *)data; | |
403 | ||
404 | if (strcmp(entry->device_class, ACPI_AC_CLASS) == 0) { | |
405 | if (power_supply_is_system_supplied() > 0) | |
406 | DRM_DEBUG_DRIVER("pm: AC\n"); | |
407 | else | |
408 | DRM_DEBUG_DRIVER("pm: DC\n"); | |
409 | ||
410 | radeon_pm_acpi_event_handler(rdev); | |
411 | } | |
412 | ||
413 | /* Check for pending SBIOS requests */ | |
414 | return radeon_atif_handler(rdev, entry); | |
415 | } | |
416 | ||
d7a2952f | 417 | /* Call all ACPI methods here */ |
c3c65160 AD |
418 | /** |
419 | * radeon_acpi_init - init driver acpi support | |
420 | * | |
421 | * @rdev: radeon_device pointer | |
422 | * | |
423 | * Verifies the AMD ACPI interfaces and registers with the acpi | |
424 | * notifier chain (all asics). | |
425 | * Returns 0 on success, error on failure. | |
426 | */ | |
d7a2952f AM |
427 | int radeon_acpi_init(struct radeon_device *rdev) |
428 | { | |
429 | acpi_handle handle; | |
ce3cf821 | 430 | struct radeon_atif *atif = &rdev->atif; |
fd64ca8a | 431 | int ret; |
d7a2952f | 432 | |
d7a2952f AM |
433 | /* Get the device handle */ |
434 | handle = DEVICE_ACPI_HANDLE(&rdev->pdev->dev); | |
435 | ||
48cc9b2c JD |
436 | /* No need to proceed if we're sure that ATIF is not supported */ |
437 | if (!ASIC_IS_AVIVO(rdev) || !rdev->bios || !handle) | |
438 | return 0; | |
439 | ||
d7a2952f | 440 | /* Call the ATIF method */ |
ce3cf821 LT |
441 | ret = radeon_atif_verify_interface(handle, atif); |
442 | if (ret) { | |
fd64ca8a | 443 | DRM_DEBUG_DRIVER("Call to verify_interface failed: %d\n", ret); |
ce3cf821 LT |
444 | goto out; |
445 | } | |
446 | ||
fda4b25c LT |
447 | if (atif->notifications.brightness_change) { |
448 | struct drm_encoder *tmp; | |
449 | struct radeon_encoder *target = NULL; | |
450 | ||
451 | /* Find the encoder controlling the brightness */ | |
452 | list_for_each_entry(tmp, &rdev->ddev->mode_config.encoder_list, | |
453 | head) { | |
454 | struct radeon_encoder *enc = to_radeon_encoder(tmp); | |
455 | struct radeon_encoder_atom_dig *dig = enc->enc_priv; | |
456 | ||
457 | if ((enc->devices & (ATOM_DEVICE_LCD_SUPPORT)) && | |
458 | dig->bl_dev != NULL) { | |
459 | target = enc; | |
460 | break; | |
461 | } | |
462 | } | |
463 | ||
464 | atif->backlight_ctl = target; | |
465 | if (!target) { | |
466 | /* Brightness change notification is enabled, but we | |
467 | * didn't find a backlight controller, this should | |
468 | * never happen. | |
469 | */ | |
470 | DRM_ERROR("Cannot find a backlight controller\n"); | |
471 | } | |
472 | } | |
473 | ||
ce3cf821 LT |
474 | if (atif->functions.sbios_requests && !atif->functions.system_params) { |
475 | /* XXX check this workraround, if sbios request function is | |
476 | * present we have to see how it's configured in the system | |
477 | * params | |
478 | */ | |
479 | atif->functions.system_params = true; | |
480 | } | |
481 | ||
482 | if (atif->functions.system_params) { | |
483 | ret = radeon_atif_get_notification_params(handle, | |
484 | &atif->notification_cfg); | |
485 | if (ret) { | |
486 | DRM_DEBUG_DRIVER("Call to GET_SYSTEM_PARAMS failed: %d\n", | |
487 | ret); | |
488 | /* Disable notification */ | |
489 | atif->notification_cfg.enabled = false; | |
490 | } | |
491 | } | |
d7a2952f | 492 | |
ce3cf821 | 493 | out: |
c4917074 AD |
494 | rdev->acpi_nb.notifier_call = radeon_acpi_event; |
495 | register_acpi_notifier(&rdev->acpi_nb); | |
496 | ||
86504672 | 497 | return ret; |
d7a2952f AM |
498 | } |
499 | ||
c3c65160 AD |
500 | /** |
501 | * radeon_acpi_fini - tear down driver acpi support | |
502 | * | |
503 | * @rdev: radeon_device pointer | |
504 | * | |
505 | * Unregisters with the acpi notifier chain (all asics). | |
506 | */ | |
c4917074 AD |
507 | void radeon_acpi_fini(struct radeon_device *rdev) |
508 | { | |
509 | unregister_acpi_notifier(&rdev->acpi_nb); | |
510 | } |