Commit | Line | Data |
---|---|---|
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> | |
28 | #include <linux/vga_switcheroo.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_acpi.h" | |
34 | #include "atom.h" | |
35 | ||
36 | #define ACPI_AC_CLASS "ac_adapter" | |
37 | ||
38 | extern void amdgpu_pm_acpi_event_handler(struct amdgpu_device *adev); | |
39 | ||
40 | struct atif_verify_interface { | |
41 | u16 size; /* structure size in bytes (includes size field) */ | |
42 | u16 version; /* version */ | |
43 | u32 notification_mask; /* supported notifications mask */ | |
44 | u32 function_bits; /* supported functions bit vector */ | |
45 | } __packed; | |
46 | ||
47 | struct atif_system_params { | |
48 | u16 size; /* structure size in bytes (includes size field) */ | |
49 | u32 valid_mask; /* valid flags mask */ | |
50 | u32 flags; /* flags */ | |
51 | u8 command_code; /* notify command code */ | |
52 | } __packed; | |
53 | ||
54 | struct atif_sbios_requests { | |
55 | u16 size; /* structure size in bytes (includes size field) */ | |
56 | u32 pending; /* pending sbios requests */ | |
57 | u8 panel_exp_mode; /* panel expansion mode */ | |
58 | u8 thermal_gfx; /* thermal state: target gfx controller */ | |
59 | u8 thermal_state; /* thermal state: state id (0: exit state, non-0: state) */ | |
60 | u8 forced_power_gfx; /* forced power state: target gfx controller */ | |
61 | u8 forced_power_state; /* forced power state: state id */ | |
62 | u8 system_power_src; /* system power source */ | |
63 | u8 backlight_level; /* panel backlight level (0-255) */ | |
64 | } __packed; | |
65 | ||
66 | #define ATIF_NOTIFY_MASK 0x3 | |
67 | #define ATIF_NOTIFY_NONE 0 | |
68 | #define ATIF_NOTIFY_81 1 | |
69 | #define ATIF_NOTIFY_N 2 | |
70 | ||
71 | struct atcs_verify_interface { | |
72 | u16 size; /* structure size in bytes (includes size field) */ | |
73 | u16 version; /* version */ | |
74 | u32 function_bits; /* supported functions bit vector */ | |
75 | } __packed; | |
76 | ||
77 | #define ATCS_VALID_FLAGS_MASK 0x3 | |
78 | ||
79 | struct atcs_pref_req_input { | |
80 | u16 size; /* structure size in bytes (includes size field) */ | |
81 | u16 client_id; /* client id (bit 2-0: func num, 7-3: dev num, 15-8: bus num) */ | |
82 | u16 valid_flags_mask; /* valid flags mask */ | |
83 | u16 flags; /* flags */ | |
84 | u8 req_type; /* request type */ | |
85 | u8 perf_req; /* performance request */ | |
86 | } __packed; | |
87 | ||
88 | struct atcs_pref_req_output { | |
89 | u16 size; /* structure size in bytes (includes size field) */ | |
90 | u8 ret_val; /* return value */ | |
91 | } __packed; | |
92 | ||
93 | /* Call the ATIF method | |
94 | */ | |
95 | /** | |
96 | * amdgpu_atif_call - call an ATIF method | |
97 | * | |
98 | * @handle: acpi handle | |
99 | * @function: the ATIF function to execute | |
100 | * @params: ATIF function params | |
101 | * | |
102 | * Executes the requested ATIF function (all asics). | |
103 | * Returns a pointer to the acpi output buffer. | |
104 | */ | |
105 | static union acpi_object *amdgpu_atif_call(acpi_handle handle, int function, | |
106 | struct acpi_buffer *params) | |
107 | { | |
108 | acpi_status status; | |
109 | union acpi_object atif_arg_elements[2]; | |
110 | struct acpi_object_list atif_arg; | |
111 | struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; | |
112 | ||
113 | atif_arg.count = 2; | |
114 | atif_arg.pointer = &atif_arg_elements[0]; | |
115 | ||
116 | atif_arg_elements[0].type = ACPI_TYPE_INTEGER; | |
117 | atif_arg_elements[0].integer.value = function; | |
118 | ||
119 | if (params) { | |
120 | atif_arg_elements[1].type = ACPI_TYPE_BUFFER; | |
121 | atif_arg_elements[1].buffer.length = params->length; | |
122 | atif_arg_elements[1].buffer.pointer = params->pointer; | |
123 | } else { | |
124 | /* We need a second fake parameter */ | |
125 | atif_arg_elements[1].type = ACPI_TYPE_INTEGER; | |
126 | atif_arg_elements[1].integer.value = 0; | |
127 | } | |
128 | ||
129 | status = acpi_evaluate_object(handle, "ATIF", &atif_arg, &buffer); | |
130 | ||
131 | /* Fail only if calling the method fails and ATIF is supported */ | |
132 | if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) { | |
133 | DRM_DEBUG_DRIVER("failed to evaluate ATIF got %s\n", | |
134 | acpi_format_exception(status)); | |
135 | kfree(buffer.pointer); | |
136 | return NULL; | |
137 | } | |
138 | ||
139 | return buffer.pointer; | |
140 | } | |
141 | ||
142 | /** | |
143 | * amdgpu_atif_parse_notification - parse supported notifications | |
144 | * | |
145 | * @n: supported notifications struct | |
146 | * @mask: supported notifications mask from ATIF | |
147 | * | |
148 | * Use the supported notifications mask from ATIF function | |
149 | * ATIF_FUNCTION_VERIFY_INTERFACE to determine what notifications | |
150 | * are supported (all asics). | |
151 | */ | |
152 | static void amdgpu_atif_parse_notification(struct amdgpu_atif_notifications *n, u32 mask) | |
153 | { | |
154 | n->display_switch = mask & ATIF_DISPLAY_SWITCH_REQUEST_SUPPORTED; | |
155 | n->expansion_mode_change = mask & ATIF_EXPANSION_MODE_CHANGE_REQUEST_SUPPORTED; | |
156 | n->thermal_state = mask & ATIF_THERMAL_STATE_CHANGE_REQUEST_SUPPORTED; | |
157 | n->forced_power_state = mask & ATIF_FORCED_POWER_STATE_CHANGE_REQUEST_SUPPORTED; | |
158 | n->system_power_state = mask & ATIF_SYSTEM_POWER_SOURCE_CHANGE_REQUEST_SUPPORTED; | |
159 | n->display_conf_change = mask & ATIF_DISPLAY_CONF_CHANGE_REQUEST_SUPPORTED; | |
160 | n->px_gfx_switch = mask & ATIF_PX_GFX_SWITCH_REQUEST_SUPPORTED; | |
161 | n->brightness_change = mask & ATIF_PANEL_BRIGHTNESS_CHANGE_REQUEST_SUPPORTED; | |
162 | n->dgpu_display_event = mask & ATIF_DGPU_DISPLAY_EVENT_SUPPORTED; | |
163 | } | |
164 | ||
165 | /** | |
166 | * amdgpu_atif_parse_functions - parse supported functions | |
167 | * | |
168 | * @f: supported functions struct | |
169 | * @mask: supported functions mask from ATIF | |
170 | * | |
171 | * Use the supported functions mask from ATIF function | |
172 | * ATIF_FUNCTION_VERIFY_INTERFACE to determine what functions | |
173 | * are supported (all asics). | |
174 | */ | |
175 | static void amdgpu_atif_parse_functions(struct amdgpu_atif_functions *f, u32 mask) | |
176 | { | |
177 | f->system_params = mask & ATIF_GET_SYSTEM_PARAMETERS_SUPPORTED; | |
178 | f->sbios_requests = mask & ATIF_GET_SYSTEM_BIOS_REQUESTS_SUPPORTED; | |
179 | f->select_active_disp = mask & ATIF_SELECT_ACTIVE_DISPLAYS_SUPPORTED; | |
180 | f->lid_state = mask & ATIF_GET_LID_STATE_SUPPORTED; | |
181 | f->get_tv_standard = mask & ATIF_GET_TV_STANDARD_FROM_CMOS_SUPPORTED; | |
182 | f->set_tv_standard = mask & ATIF_SET_TV_STANDARD_IN_CMOS_SUPPORTED; | |
183 | f->get_panel_expansion_mode = mask & ATIF_GET_PANEL_EXPANSION_MODE_FROM_CMOS_SUPPORTED; | |
184 | f->set_panel_expansion_mode = mask & ATIF_SET_PANEL_EXPANSION_MODE_IN_CMOS_SUPPORTED; | |
185 | f->temperature_change = mask & ATIF_TEMPERATURE_CHANGE_NOTIFICATION_SUPPORTED; | |
186 | f->graphics_device_types = mask & ATIF_GET_GRAPHICS_DEVICE_TYPES_SUPPORTED; | |
187 | } | |
188 | ||
189 | /** | |
190 | * amdgpu_atif_verify_interface - verify ATIF | |
191 | * | |
192 | * @handle: acpi handle | |
193 | * @atif: amdgpu atif struct | |
194 | * | |
195 | * Execute the ATIF_FUNCTION_VERIFY_INTERFACE ATIF function | |
196 | * to initialize ATIF and determine what features are supported | |
197 | * (all asics). | |
198 | * returns 0 on success, error on failure. | |
199 | */ | |
200 | static int amdgpu_atif_verify_interface(acpi_handle handle, | |
201 | struct amdgpu_atif *atif) | |
202 | { | |
203 | union acpi_object *info; | |
204 | struct atif_verify_interface output; | |
205 | size_t size; | |
206 | int err = 0; | |
207 | ||
208 | info = amdgpu_atif_call(handle, ATIF_FUNCTION_VERIFY_INTERFACE, NULL); | |
209 | if (!info) | |
210 | return -EIO; | |
211 | ||
212 | memset(&output, 0, sizeof(output)); | |
213 | ||
214 | size = *(u16 *) info->buffer.pointer; | |
215 | if (size < 12) { | |
216 | DRM_INFO("ATIF buffer is too small: %zu\n", size); | |
217 | err = -EINVAL; | |
218 | goto out; | |
219 | } | |
220 | size = min(sizeof(output), size); | |
221 | ||
222 | memcpy(&output, info->buffer.pointer, size); | |
223 | ||
224 | /* TODO: check version? */ | |
225 | DRM_DEBUG_DRIVER("ATIF version %u\n", output.version); | |
226 | ||
227 | amdgpu_atif_parse_notification(&atif->notifications, output.notification_mask); | |
228 | amdgpu_atif_parse_functions(&atif->functions, output.function_bits); | |
229 | ||
230 | out: | |
231 | kfree(info); | |
232 | return err; | |
233 | } | |
234 | ||
235 | /** | |
236 | * amdgpu_atif_get_notification_params - determine notify configuration | |
237 | * | |
238 | * @handle: acpi handle | |
239 | * @n: atif notification configuration struct | |
240 | * | |
241 | * Execute the ATIF_FUNCTION_GET_SYSTEM_PARAMETERS ATIF function | |
242 | * to determine if a notifier is used and if so which one | |
243 | * (all asics). This is either Notify(VGA, 0x81) or Notify(VGA, n) | |
244 | * where n is specified in the result if a notifier is used. | |
245 | * Returns 0 on success, error on failure. | |
246 | */ | |
247 | static int amdgpu_atif_get_notification_params(acpi_handle handle, | |
248 | struct amdgpu_atif_notification_cfg *n) | |
249 | { | |
250 | union acpi_object *info; | |
251 | struct atif_system_params params; | |
252 | size_t size; | |
253 | int err = 0; | |
254 | ||
255 | info = amdgpu_atif_call(handle, ATIF_FUNCTION_GET_SYSTEM_PARAMETERS, NULL); | |
256 | if (!info) { | |
257 | err = -EIO; | |
258 | goto out; | |
259 | } | |
260 | ||
261 | size = *(u16 *) info->buffer.pointer; | |
262 | if (size < 10) { | |
263 | err = -EINVAL; | |
264 | goto out; | |
265 | } | |
266 | ||
267 | memset(¶ms, 0, sizeof(params)); | |
268 | size = min(sizeof(params), size); | |
269 | memcpy(¶ms, info->buffer.pointer, size); | |
270 | ||
271 | DRM_DEBUG_DRIVER("SYSTEM_PARAMS: mask = %#x, flags = %#x\n", | |
272 | params.flags, params.valid_mask); | |
273 | params.flags = params.flags & params.valid_mask; | |
274 | ||
275 | if ((params.flags & ATIF_NOTIFY_MASK) == ATIF_NOTIFY_NONE) { | |
276 | n->enabled = false; | |
277 | n->command_code = 0; | |
278 | } else if ((params.flags & ATIF_NOTIFY_MASK) == ATIF_NOTIFY_81) { | |
279 | n->enabled = true; | |
280 | n->command_code = 0x81; | |
281 | } else { | |
282 | if (size < 11) { | |
283 | err = -EINVAL; | |
284 | goto out; | |
285 | } | |
286 | n->enabled = true; | |
287 | n->command_code = params.command_code; | |
288 | } | |
289 | ||
290 | out: | |
291 | DRM_DEBUG_DRIVER("Notification %s, command code = %#x\n", | |
292 | (n->enabled ? "enabled" : "disabled"), | |
293 | n->command_code); | |
294 | kfree(info); | |
295 | return err; | |
296 | } | |
297 | ||
298 | /** | |
299 | * amdgpu_atif_get_sbios_requests - get requested sbios event | |
300 | * | |
301 | * @handle: acpi handle | |
302 | * @req: atif sbios request struct | |
303 | * | |
304 | * Execute the ATIF_FUNCTION_GET_SYSTEM_BIOS_REQUESTS ATIF function | |
305 | * to determine what requests the sbios is making to the driver | |
306 | * (all asics). | |
307 | * Returns 0 on success, error on failure. | |
308 | */ | |
309 | static int amdgpu_atif_get_sbios_requests(acpi_handle handle, | |
310 | struct atif_sbios_requests *req) | |
311 | { | |
312 | union acpi_object *info; | |
313 | size_t size; | |
314 | int count = 0; | |
315 | ||
316 | info = amdgpu_atif_call(handle, ATIF_FUNCTION_GET_SYSTEM_BIOS_REQUESTS, NULL); | |
317 | if (!info) | |
318 | return -EIO; | |
319 | ||
320 | size = *(u16 *)info->buffer.pointer; | |
321 | if (size < 0xd) { | |
322 | count = -EINVAL; | |
323 | goto out; | |
324 | } | |
325 | memset(req, 0, sizeof(*req)); | |
326 | ||
327 | size = min(sizeof(*req), size); | |
328 | memcpy(req, info->buffer.pointer, size); | |
329 | DRM_DEBUG_DRIVER("SBIOS pending requests: %#x\n", req->pending); | |
330 | ||
331 | count = hweight32(req->pending); | |
332 | ||
333 | out: | |
334 | kfree(info); | |
335 | return count; | |
336 | } | |
337 | ||
338 | /** | |
339 | * amdgpu_atif_handler - handle ATIF notify requests | |
340 | * | |
341 | * @adev: amdgpu_device pointer | |
342 | * @event: atif sbios request struct | |
343 | * | |
344 | * Checks the acpi event and if it matches an atif event, | |
345 | * handles it. | |
346 | * Returns NOTIFY code | |
347 | */ | |
348 | int amdgpu_atif_handler(struct amdgpu_device *adev, | |
349 | struct acpi_bus_event *event) | |
350 | { | |
351 | struct amdgpu_atif *atif = &adev->atif; | |
352 | struct atif_sbios_requests req; | |
353 | acpi_handle handle; | |
354 | int count; | |
355 | ||
356 | DRM_DEBUG_DRIVER("event, device_class = %s, type = %#x\n", | |
357 | event->device_class, event->type); | |
358 | ||
359 | if (strcmp(event->device_class, ACPI_VIDEO_CLASS) != 0) | |
360 | return NOTIFY_DONE; | |
361 | ||
362 | if (!atif->notification_cfg.enabled || | |
363 | event->type != atif->notification_cfg.command_code) | |
364 | /* Not our event */ | |
365 | return NOTIFY_DONE; | |
366 | ||
367 | /* Check pending SBIOS requests */ | |
368 | handle = ACPI_HANDLE(&adev->pdev->dev); | |
369 | count = amdgpu_atif_get_sbios_requests(handle, &req); | |
370 | ||
371 | if (count <= 0) | |
372 | return NOTIFY_DONE; | |
373 | ||
374 | DRM_DEBUG_DRIVER("ATIF: %d pending SBIOS requests\n", count); | |
375 | ||
376 | if (req.pending & ATIF_PANEL_BRIGHTNESS_CHANGE_REQUEST) { | |
377 | struct amdgpu_encoder *enc = atif->encoder_for_bl; | |
378 | ||
379 | if (enc) { | |
380 | struct amdgpu_encoder_atom_dig *dig = enc->enc_priv; | |
381 | ||
382 | DRM_DEBUG_DRIVER("Changing brightness to %d\n", | |
383 | req.backlight_level); | |
384 | ||
385 | amdgpu_display_backlight_set_level(adev, enc, req.backlight_level); | |
386 | ||
387 | #if defined(CONFIG_BACKLIGHT_CLASS_DEVICE) || defined(CONFIG_BACKLIGHT_CLASS_DEVICE_MODULE) | |
388 | backlight_force_update(dig->bl_dev, | |
389 | BACKLIGHT_UPDATE_HOTKEY); | |
390 | #endif | |
391 | } | |
392 | } | |
393 | /* TODO: check other events */ | |
394 | ||
395 | /* We've handled the event, stop the notifier chain. The ACPI interface | |
396 | * overloads ACPI_VIDEO_NOTIFY_PROBE, we don't want to send that to | |
397 | * userspace if the event was generated only to signal a SBIOS | |
398 | * request. | |
399 | */ | |
400 | return NOTIFY_BAD; | |
401 | } | |
402 | ||
403 | /* Call the ATCS method | |
404 | */ | |
405 | /** | |
406 | * amdgpu_atcs_call - call an ATCS method | |
407 | * | |
408 | * @handle: acpi handle | |
409 | * @function: the ATCS function to execute | |
410 | * @params: ATCS function params | |
411 | * | |
412 | * Executes the requested ATCS function (all asics). | |
413 | * Returns a pointer to the acpi output buffer. | |
414 | */ | |
415 | static union acpi_object *amdgpu_atcs_call(acpi_handle handle, int function, | |
416 | struct acpi_buffer *params) | |
417 | { | |
418 | acpi_status status; | |
419 | union acpi_object atcs_arg_elements[2]; | |
420 | struct acpi_object_list atcs_arg; | |
421 | struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; | |
422 | ||
423 | atcs_arg.count = 2; | |
424 | atcs_arg.pointer = &atcs_arg_elements[0]; | |
425 | ||
426 | atcs_arg_elements[0].type = ACPI_TYPE_INTEGER; | |
427 | atcs_arg_elements[0].integer.value = function; | |
428 | ||
429 | if (params) { | |
430 | atcs_arg_elements[1].type = ACPI_TYPE_BUFFER; | |
431 | atcs_arg_elements[1].buffer.length = params->length; | |
432 | atcs_arg_elements[1].buffer.pointer = params->pointer; | |
433 | } else { | |
434 | /* We need a second fake parameter */ | |
435 | atcs_arg_elements[1].type = ACPI_TYPE_INTEGER; | |
436 | atcs_arg_elements[1].integer.value = 0; | |
437 | } | |
438 | ||
439 | status = acpi_evaluate_object(handle, "ATCS", &atcs_arg, &buffer); | |
440 | ||
441 | /* Fail only if calling the method fails and ATIF is supported */ | |
442 | if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) { | |
443 | DRM_DEBUG_DRIVER("failed to evaluate ATCS got %s\n", | |
444 | acpi_format_exception(status)); | |
445 | kfree(buffer.pointer); | |
446 | return NULL; | |
447 | } | |
448 | ||
449 | return buffer.pointer; | |
450 | } | |
451 | ||
452 | /** | |
453 | * amdgpu_atcs_parse_functions - parse supported functions | |
454 | * | |
455 | * @f: supported functions struct | |
456 | * @mask: supported functions mask from ATCS | |
457 | * | |
458 | * Use the supported functions mask from ATCS function | |
459 | * ATCS_FUNCTION_VERIFY_INTERFACE to determine what functions | |
460 | * are supported (all asics). | |
461 | */ | |
462 | static void amdgpu_atcs_parse_functions(struct amdgpu_atcs_functions *f, u32 mask) | |
463 | { | |
464 | f->get_ext_state = mask & ATCS_GET_EXTERNAL_STATE_SUPPORTED; | |
465 | f->pcie_perf_req = mask & ATCS_PCIE_PERFORMANCE_REQUEST_SUPPORTED; | |
466 | f->pcie_dev_rdy = mask & ATCS_PCIE_DEVICE_READY_NOTIFICATION_SUPPORTED; | |
467 | f->pcie_bus_width = mask & ATCS_SET_PCIE_BUS_WIDTH_SUPPORTED; | |
468 | } | |
469 | ||
470 | /** | |
471 | * amdgpu_atcs_verify_interface - verify ATCS | |
472 | * | |
473 | * @handle: acpi handle | |
474 | * @atcs: amdgpu atcs struct | |
475 | * | |
476 | * Execute the ATCS_FUNCTION_VERIFY_INTERFACE ATCS function | |
477 | * to initialize ATCS and determine what features are supported | |
478 | * (all asics). | |
479 | * returns 0 on success, error on failure. | |
480 | */ | |
481 | static int amdgpu_atcs_verify_interface(acpi_handle handle, | |
482 | struct amdgpu_atcs *atcs) | |
483 | { | |
484 | union acpi_object *info; | |
485 | struct atcs_verify_interface output; | |
486 | size_t size; | |
487 | int err = 0; | |
488 | ||
489 | info = amdgpu_atcs_call(handle, ATCS_FUNCTION_VERIFY_INTERFACE, NULL); | |
490 | if (!info) | |
491 | return -EIO; | |
492 | ||
493 | memset(&output, 0, sizeof(output)); | |
494 | ||
495 | size = *(u16 *) info->buffer.pointer; | |
496 | if (size < 8) { | |
497 | DRM_INFO("ATCS buffer is too small: %zu\n", size); | |
498 | err = -EINVAL; | |
499 | goto out; | |
500 | } | |
501 | size = min(sizeof(output), size); | |
502 | ||
503 | memcpy(&output, info->buffer.pointer, size); | |
504 | ||
505 | /* TODO: check version? */ | |
506 | DRM_DEBUG_DRIVER("ATCS version %u\n", output.version); | |
507 | ||
508 | amdgpu_atcs_parse_functions(&atcs->functions, output.function_bits); | |
509 | ||
510 | out: | |
511 | kfree(info); | |
512 | return err; | |
513 | } | |
514 | ||
515 | /** | |
516 | * amdgpu_acpi_is_pcie_performance_request_supported | |
517 | * | |
518 | * @adev: amdgpu_device pointer | |
519 | * | |
520 | * Check if the ATCS pcie_perf_req and pcie_dev_rdy methods | |
521 | * are supported (all asics). | |
522 | * returns true if supported, false if not. | |
523 | */ | |
524 | bool amdgpu_acpi_is_pcie_performance_request_supported(struct amdgpu_device *adev) | |
525 | { | |
526 | struct amdgpu_atcs *atcs = &adev->atcs; | |
527 | ||
528 | if (atcs->functions.pcie_perf_req && atcs->functions.pcie_dev_rdy) | |
529 | return true; | |
530 | ||
531 | return false; | |
532 | } | |
533 | ||
534 | /** | |
535 | * amdgpu_acpi_pcie_notify_device_ready | |
536 | * | |
537 | * @adev: amdgpu_device pointer | |
538 | * | |
539 | * Executes the PCIE_DEVICE_READY_NOTIFICATION method | |
540 | * (all asics). | |
541 | * returns 0 on success, error on failure. | |
542 | */ | |
543 | int amdgpu_acpi_pcie_notify_device_ready(struct amdgpu_device *adev) | |
544 | { | |
545 | acpi_handle handle; | |
546 | union acpi_object *info; | |
547 | struct amdgpu_atcs *atcs = &adev->atcs; | |
548 | ||
549 | /* Get the device handle */ | |
550 | handle = ACPI_HANDLE(&adev->pdev->dev); | |
551 | if (!handle) | |
552 | return -EINVAL; | |
553 | ||
554 | if (!atcs->functions.pcie_dev_rdy) | |
555 | return -EINVAL; | |
556 | ||
557 | info = amdgpu_atcs_call(handle, ATCS_FUNCTION_PCIE_DEVICE_READY_NOTIFICATION, NULL); | |
558 | if (!info) | |
559 | return -EIO; | |
560 | ||
561 | kfree(info); | |
562 | ||
563 | return 0; | |
564 | } | |
565 | ||
566 | /** | |
567 | * amdgpu_acpi_pcie_performance_request | |
568 | * | |
569 | * @adev: amdgpu_device pointer | |
570 | * @perf_req: requested perf level (pcie gen speed) | |
571 | * @advertise: set advertise caps flag if set | |
572 | * | |
573 | * Executes the PCIE_PERFORMANCE_REQUEST method to | |
574 | * change the pcie gen speed (all asics). | |
575 | * returns 0 on success, error on failure. | |
576 | */ | |
577 | int amdgpu_acpi_pcie_performance_request(struct amdgpu_device *adev, | |
578 | u8 perf_req, bool advertise) | |
579 | { | |
580 | acpi_handle handle; | |
581 | union acpi_object *info; | |
582 | struct amdgpu_atcs *atcs = &adev->atcs; | |
583 | struct atcs_pref_req_input atcs_input; | |
584 | struct atcs_pref_req_output atcs_output; | |
585 | struct acpi_buffer params; | |
586 | size_t size; | |
587 | u32 retry = 3; | |
588 | ||
589 | /* Get the device handle */ | |
590 | handle = ACPI_HANDLE(&adev->pdev->dev); | |
591 | if (!handle) | |
592 | return -EINVAL; | |
593 | ||
594 | if (!atcs->functions.pcie_perf_req) | |
595 | return -EINVAL; | |
596 | ||
597 | atcs_input.size = sizeof(struct atcs_pref_req_input); | |
598 | /* client id (bit 2-0: func num, 7-3: dev num, 15-8: bus num) */ | |
599 | atcs_input.client_id = adev->pdev->devfn | (adev->pdev->bus->number << 8); | |
600 | atcs_input.valid_flags_mask = ATCS_VALID_FLAGS_MASK; | |
601 | atcs_input.flags = ATCS_WAIT_FOR_COMPLETION; | |
602 | if (advertise) | |
603 | atcs_input.flags |= ATCS_ADVERTISE_CAPS; | |
604 | atcs_input.req_type = ATCS_PCIE_LINK_SPEED; | |
605 | atcs_input.perf_req = perf_req; | |
606 | ||
607 | params.length = sizeof(struct atcs_pref_req_input); | |
608 | params.pointer = &atcs_input; | |
609 | ||
610 | while (retry--) { | |
611 | info = amdgpu_atcs_call(handle, ATCS_FUNCTION_PCIE_PERFORMANCE_REQUEST, ¶ms); | |
612 | if (!info) | |
613 | return -EIO; | |
614 | ||
615 | memset(&atcs_output, 0, sizeof(atcs_output)); | |
616 | ||
617 | size = *(u16 *) info->buffer.pointer; | |
618 | if (size < 3) { | |
619 | DRM_INFO("ATCS buffer is too small: %zu\n", size); | |
620 | kfree(info); | |
621 | return -EINVAL; | |
622 | } | |
623 | size = min(sizeof(atcs_output), size); | |
624 | ||
625 | memcpy(&atcs_output, info->buffer.pointer, size); | |
626 | ||
627 | kfree(info); | |
628 | ||
629 | switch (atcs_output.ret_val) { | |
630 | case ATCS_REQUEST_REFUSED: | |
631 | default: | |
632 | return -EINVAL; | |
633 | case ATCS_REQUEST_COMPLETE: | |
634 | return 0; | |
635 | case ATCS_REQUEST_IN_PROGRESS: | |
636 | udelay(10); | |
637 | break; | |
638 | } | |
639 | } | |
640 | ||
641 | return 0; | |
642 | } | |
643 | ||
644 | /** | |
645 | * amdgpu_acpi_event - handle notify events | |
646 | * | |
647 | * @nb: notifier block | |
648 | * @val: val | |
649 | * @data: acpi event | |
650 | * | |
651 | * Calls relevant amdgpu functions in response to various | |
652 | * acpi events. | |
653 | * Returns NOTIFY code | |
654 | */ | |
655 | static int amdgpu_acpi_event(struct notifier_block *nb, | |
656 | unsigned long val, | |
657 | void *data) | |
658 | { | |
659 | struct amdgpu_device *adev = container_of(nb, struct amdgpu_device, acpi_nb); | |
660 | struct acpi_bus_event *entry = (struct acpi_bus_event *)data; | |
661 | ||
662 | if (strcmp(entry->device_class, ACPI_AC_CLASS) == 0) { | |
663 | if (power_supply_is_system_supplied() > 0) | |
664 | DRM_DEBUG_DRIVER("pm: AC\n"); | |
665 | else | |
666 | DRM_DEBUG_DRIVER("pm: DC\n"); | |
667 | ||
668 | amdgpu_pm_acpi_event_handler(adev); | |
669 | } | |
670 | ||
671 | /* Check for pending SBIOS requests */ | |
672 | return amdgpu_atif_handler(adev, entry); | |
673 | } | |
674 | ||
675 | /* Call all ACPI methods here */ | |
676 | /** | |
677 | * amdgpu_acpi_init - init driver acpi support | |
678 | * | |
679 | * @adev: amdgpu_device pointer | |
680 | * | |
681 | * Verifies the AMD ACPI interfaces and registers with the acpi | |
682 | * notifier chain (all asics). | |
683 | * Returns 0 on success, error on failure. | |
684 | */ | |
685 | int amdgpu_acpi_init(struct amdgpu_device *adev) | |
686 | { | |
687 | acpi_handle handle; | |
688 | struct amdgpu_atif *atif = &adev->atif; | |
689 | struct amdgpu_atcs *atcs = &adev->atcs; | |
690 | int ret; | |
691 | ||
692 | /* Get the device handle */ | |
693 | handle = ACPI_HANDLE(&adev->pdev->dev); | |
694 | ||
695 | if (!adev->bios || !handle) | |
696 | return 0; | |
697 | ||
698 | /* Call the ATCS method */ | |
699 | ret = amdgpu_atcs_verify_interface(handle, atcs); | |
700 | if (ret) { | |
701 | DRM_DEBUG_DRIVER("Call to ATCS verify_interface failed: %d\n", ret); | |
702 | } | |
703 | ||
704 | /* Call the ATIF method */ | |
705 | ret = amdgpu_atif_verify_interface(handle, atif); | |
706 | if (ret) { | |
707 | DRM_DEBUG_DRIVER("Call to ATIF verify_interface failed: %d\n", ret); | |
708 | goto out; | |
709 | } | |
710 | ||
711 | if (atif->notifications.brightness_change) { | |
712 | struct drm_encoder *tmp; | |
713 | ||
714 | /* Find the encoder controlling the brightness */ | |
715 | list_for_each_entry(tmp, &adev->ddev->mode_config.encoder_list, | |
716 | head) { | |
717 | struct amdgpu_encoder *enc = to_amdgpu_encoder(tmp); | |
718 | ||
719 | if ((enc->devices & (ATOM_DEVICE_LCD_SUPPORT)) && | |
720 | enc->enc_priv) { | |
721 | if (adev->is_atom_bios) { | |
722 | struct amdgpu_encoder_atom_dig *dig = enc->enc_priv; | |
723 | if (dig->bl_dev) { | |
724 | atif->encoder_for_bl = enc; | |
725 | break; | |
726 | } | |
727 | } | |
728 | } | |
729 | } | |
730 | } | |
731 | ||
732 | if (atif->functions.sbios_requests && !atif->functions.system_params) { | |
733 | /* XXX check this workraround, if sbios request function is | |
734 | * present we have to see how it's configured in the system | |
735 | * params | |
736 | */ | |
737 | atif->functions.system_params = true; | |
738 | } | |
739 | ||
740 | if (atif->functions.system_params) { | |
741 | ret = amdgpu_atif_get_notification_params(handle, | |
742 | &atif->notification_cfg); | |
743 | if (ret) { | |
744 | DRM_DEBUG_DRIVER("Call to GET_SYSTEM_PARAMS failed: %d\n", | |
745 | ret); | |
746 | /* Disable notification */ | |
747 | atif->notification_cfg.enabled = false; | |
748 | } | |
749 | } | |
750 | ||
751 | out: | |
752 | adev->acpi_nb.notifier_call = amdgpu_acpi_event; | |
753 | register_acpi_notifier(&adev->acpi_nb); | |
754 | ||
755 | return ret; | |
756 | } | |
757 | ||
758 | /** | |
759 | * amdgpu_acpi_fini - tear down driver acpi support | |
760 | * | |
761 | * @adev: amdgpu_device pointer | |
762 | * | |
763 | * Unregisters with the acpi notifier chain (all asics). | |
764 | */ | |
765 | void amdgpu_acpi_fini(struct amdgpu_device *adev) | |
766 | { | |
767 | unregister_acpi_notifier(&adev->acpi_nb); | |
768 | } |