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/acpi.h>
25 #include <linux/backlight.h>
26 #include <linux/pci.h>
27 #include <linux/pm_runtime.h>
28 #include <linux/power_supply.h>
29 #include <linux/slab.h>
30
31 #include <acpi/acpi_bus.h>
32 #include <acpi/video.h>
33
34 #include <drm/drm_probe_helper.h>
35
36 #include "atom.h"
37 #include "radeon.h"
38 #include "radeon_acpi.h"
39 #include "radeon_pm.h"
40
41 #if defined(CONFIG_VGA_SWITCHEROO)
42 bool radeon_atpx_dgpu_req_power_for_displays(void);
43 #else
radeon_atpx_dgpu_req_power_for_displays(void)44 static inline bool radeon_atpx_dgpu_req_power_for_displays(void) { return false; }
45 #endif
46
47 struct atif_verify_interface {
48 u16 size; /* structure size in bytes (includes size field) */
49 u16 version; /* version */
50 u32 notification_mask; /* supported notifications mask */
51 u32 function_bits; /* supported functions bit vector */
52 } __packed;
53
54 struct atif_system_params {
55 u16 size; /* structure size in bytes (includes size field) */
56 u32 valid_mask; /* valid flags mask */
57 u32 flags; /* flags */
58 u8 command_code; /* notify command code */
59 } __packed;
60
61 struct atif_sbios_requests {
62 u16 size; /* structure size in bytes (includes size field) */
63 u32 pending; /* pending sbios requests */
64 u8 panel_exp_mode; /* panel expansion mode */
65 u8 thermal_gfx; /* thermal state: target gfx controller */
66 u8 thermal_state; /* thermal state: state id (0: exit state, non-0: state) */
67 u8 forced_power_gfx; /* forced power state: target gfx controller */
68 u8 forced_power_state; /* forced power state: state id */
69 u8 system_power_src; /* system power source */
70 u8 backlight_level; /* panel backlight level (0-255) */
71 } __packed;
72
73 #define ATIF_NOTIFY_MASK 0x3
74 #define ATIF_NOTIFY_NONE 0
75 #define ATIF_NOTIFY_81 1
76 #define ATIF_NOTIFY_N 2
77
78 struct atcs_verify_interface {
79 u16 size; /* structure size in bytes (includes size field) */
80 u16 version; /* version */
81 u32 function_bits; /* supported functions bit vector */
82 } __packed;
83
84 #define ATCS_VALID_FLAGS_MASK 0x3
85
86 struct atcs_pref_req_input {
87 u16 size; /* structure size in bytes (includes size field) */
88 u16 client_id; /* client id (bit 2-0: func num, 7-3: dev num, 15-8: bus num) */
89 u16 valid_flags_mask; /* valid flags mask */
90 u16 flags; /* flags */
91 u8 req_type; /* request type */
92 u8 perf_req; /* performance request */
93 } __packed;
94
95 struct atcs_pref_req_output {
96 u16 size; /* structure size in bytes (includes size field) */
97 u8 ret_val; /* return value */
98 } __packed;
99
100 /* Call the ATIF method
101 */
102 /**
103 * radeon_atif_call - call an ATIF method
104 *
105 * @handle: acpi handle
106 * @function: the ATIF function to execute
107 * @params: ATIF function params
108 *
109 * Executes the requested ATIF function (all asics).
110 * Returns a pointer to the acpi output buffer.
111 */
radeon_atif_call(acpi_handle handle,int function,struct acpi_buffer * params)112 static union acpi_object *radeon_atif_call(acpi_handle handle, int function,
113 struct acpi_buffer *params)
114 {
115 acpi_status status;
116 union acpi_object atif_arg_elements[2];
117 struct acpi_object_list atif_arg;
118 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
119
120 atif_arg.count = 2;
121 atif_arg.pointer = &atif_arg_elements[0];
122
123 atif_arg_elements[0].type = ACPI_TYPE_INTEGER;
124 atif_arg_elements[0].integer.value = function;
125
126 if (params) {
127 atif_arg_elements[1].type = ACPI_TYPE_BUFFER;
128 atif_arg_elements[1].buffer.length = params->length;
129 atif_arg_elements[1].buffer.pointer = params->pointer;
130 } else {
131 /* We need a second fake parameter */
132 atif_arg_elements[1].type = ACPI_TYPE_INTEGER;
133 atif_arg_elements[1].integer.value = 0;
134 }
135
136 status = acpi_evaluate_object(handle, "ATIF", &atif_arg, &buffer);
137
138 /* Fail only if calling the method fails and ATIF is supported */
139 if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) {
140 DRM_DEBUG_DRIVER("failed to evaluate ATIF got %s\n",
141 acpi_format_exception(status));
142 kfree(buffer.pointer);
143 return NULL;
144 }
145
146 return buffer.pointer;
147 }
148
149 /**
150 * radeon_atif_parse_notification - parse supported notifications
151 *
152 * @n: supported notifications struct
153 * @mask: supported notifications mask from ATIF
154 *
155 * Use the supported notifications mask from ATIF function
156 * ATIF_FUNCTION_VERIFY_INTERFACE to determine what notifications
157 * are supported (all asics).
158 */
radeon_atif_parse_notification(struct radeon_atif_notifications * n,u32 mask)159 static void radeon_atif_parse_notification(struct radeon_atif_notifications *n, u32 mask)
160 {
161 n->display_switch = mask & ATIF_DISPLAY_SWITCH_REQUEST_SUPPORTED;
162 n->expansion_mode_change = mask & ATIF_EXPANSION_MODE_CHANGE_REQUEST_SUPPORTED;
163 n->thermal_state = mask & ATIF_THERMAL_STATE_CHANGE_REQUEST_SUPPORTED;
164 n->forced_power_state = mask & ATIF_FORCED_POWER_STATE_CHANGE_REQUEST_SUPPORTED;
165 n->system_power_state = mask & ATIF_SYSTEM_POWER_SOURCE_CHANGE_REQUEST_SUPPORTED;
166 n->display_conf_change = mask & ATIF_DISPLAY_CONF_CHANGE_REQUEST_SUPPORTED;
167 n->px_gfx_switch = mask & ATIF_PX_GFX_SWITCH_REQUEST_SUPPORTED;
168 n->brightness_change = mask & ATIF_PANEL_BRIGHTNESS_CHANGE_REQUEST_SUPPORTED;
169 n->dgpu_display_event = mask & ATIF_DGPU_DISPLAY_EVENT_SUPPORTED;
170 }
171
172 /**
173 * radeon_atif_parse_functions - parse supported functions
174 *
175 * @f: supported functions struct
176 * @mask: supported functions mask from ATIF
177 *
178 * Use the supported functions mask from ATIF function
179 * ATIF_FUNCTION_VERIFY_INTERFACE to determine what functions
180 * are supported (all asics).
181 */
radeon_atif_parse_functions(struct radeon_atif_functions * f,u32 mask)182 static void radeon_atif_parse_functions(struct radeon_atif_functions *f, u32 mask)
183 {
184 f->system_params = mask & ATIF_GET_SYSTEM_PARAMETERS_SUPPORTED;
185 f->sbios_requests = mask & ATIF_GET_SYSTEM_BIOS_REQUESTS_SUPPORTED;
186 f->select_active_disp = mask & ATIF_SELECT_ACTIVE_DISPLAYS_SUPPORTED;
187 f->lid_state = mask & ATIF_GET_LID_STATE_SUPPORTED;
188 f->get_tv_standard = mask & ATIF_GET_TV_STANDARD_FROM_CMOS_SUPPORTED;
189 f->set_tv_standard = mask & ATIF_SET_TV_STANDARD_IN_CMOS_SUPPORTED;
190 f->get_panel_expansion_mode = mask & ATIF_GET_PANEL_EXPANSION_MODE_FROM_CMOS_SUPPORTED;
191 f->set_panel_expansion_mode = mask & ATIF_SET_PANEL_EXPANSION_MODE_IN_CMOS_SUPPORTED;
192 f->temperature_change = mask & ATIF_TEMPERATURE_CHANGE_NOTIFICATION_SUPPORTED;
193 f->graphics_device_types = mask & ATIF_GET_GRAPHICS_DEVICE_TYPES_SUPPORTED;
194 }
195
196 /**
197 * radeon_atif_verify_interface - verify ATIF
198 *
199 * @handle: acpi handle
200 * @atif: radeon atif struct
201 *
202 * Execute the ATIF_FUNCTION_VERIFY_INTERFACE ATIF function
203 * to initialize ATIF and determine what features are supported
204 * (all asics).
205 * returns 0 on success, error on failure.
206 */
radeon_atif_verify_interface(acpi_handle handle,struct radeon_atif * atif)207 static int radeon_atif_verify_interface(acpi_handle handle,
208 struct radeon_atif *atif)
209 {
210 union acpi_object *info;
211 struct atif_verify_interface output;
212 size_t size;
213 int err = 0;
214
215 info = radeon_atif_call(handle, ATIF_FUNCTION_VERIFY_INTERFACE, NULL);
216 if (!info)
217 return -EIO;
218
219 memset(&output, 0, sizeof(output));
220
221 size = *(u16 *) info->buffer.pointer;
222 if (size < 12) {
223 DRM_INFO("ATIF buffer is too small: %zu\n", size);
224 err = -EINVAL;
225 goto out;
226 }
227 size = min(sizeof(output), size);
228
229 memcpy(&output, info->buffer.pointer, size);
230
231 /* TODO: check version? */
232 DRM_DEBUG_DRIVER("ATIF version %u\n", output.version);
233
234 radeon_atif_parse_notification(&atif->notifications, output.notification_mask);
235 radeon_atif_parse_functions(&atif->functions, output.function_bits);
236
237 out:
238 kfree(info);
239 return err;
240 }
241
242 /**
243 * radeon_atif_get_notification_params - determine notify configuration
244 *
245 * @handle: acpi handle
246 * @n: atif notification configuration struct
247 *
248 * Execute the ATIF_FUNCTION_GET_SYSTEM_PARAMETERS ATIF function
249 * to determine if a notifier is used and if so which one
250 * (all asics). This is either Notify(VGA, 0x81) or Notify(VGA, n)
251 * where n is specified in the result if a notifier is used.
252 * Returns 0 on success, error on failure.
253 */
radeon_atif_get_notification_params(acpi_handle handle,struct radeon_atif_notification_cfg * n)254 static int radeon_atif_get_notification_params(acpi_handle handle,
255 struct radeon_atif_notification_cfg *n)
256 {
257 union acpi_object *info;
258 struct atif_system_params params;
259 size_t size;
260 int err = 0;
261
262 info = radeon_atif_call(handle, ATIF_FUNCTION_GET_SYSTEM_PARAMETERS, NULL);
263 if (!info) {
264 err = -EIO;
265 goto out;
266 }
267
268 size = *(u16 *) info->buffer.pointer;
269 if (size < 10) {
270 err = -EINVAL;
271 goto out;
272 }
273
274 memset(¶ms, 0, sizeof(params));
275 size = min(sizeof(params), size);
276 memcpy(¶ms, info->buffer.pointer, size);
277
278 DRM_DEBUG_DRIVER("SYSTEM_PARAMS: mask = %#x, flags = %#x\n",
279 params.flags, params.valid_mask);
280 params.flags = params.flags & params.valid_mask;
281
282 if ((params.flags & ATIF_NOTIFY_MASK) == ATIF_NOTIFY_NONE) {
283 n->enabled = false;
284 n->command_code = 0;
285 } else if ((params.flags & ATIF_NOTIFY_MASK) == ATIF_NOTIFY_81) {
286 n->enabled = true;
287 n->command_code = 0x81;
288 } else {
289 if (size < 11) {
290 err = -EINVAL;
291 goto out;
292 }
293 n->enabled = true;
294 n->command_code = params.command_code;
295 }
296
297 out:
298 DRM_DEBUG_DRIVER("Notification %s, command code = %#x\n",
299 (n->enabled ? "enabled" : "disabled"),
300 n->command_code);
301 kfree(info);
302 return err;
303 }
304
305 /**
306 * radeon_atif_get_sbios_requests - get requested sbios event
307 *
308 * @handle: acpi handle
309 * @req: atif sbios request struct
310 *
311 * Execute the ATIF_FUNCTION_GET_SYSTEM_BIOS_REQUESTS ATIF function
312 * to determine what requests the sbios is making to the driver
313 * (all asics).
314 * Returns 0 on success, error on failure.
315 */
radeon_atif_get_sbios_requests(acpi_handle handle,struct atif_sbios_requests * req)316 static int radeon_atif_get_sbios_requests(acpi_handle handle,
317 struct atif_sbios_requests *req)
318 {
319 union acpi_object *info;
320 size_t size;
321 int count = 0;
322
323 info = radeon_atif_call(handle, ATIF_FUNCTION_GET_SYSTEM_BIOS_REQUESTS, NULL);
324 if (!info)
325 return -EIO;
326
327 size = *(u16 *)info->buffer.pointer;
328 if (size < 0xd) {
329 count = -EINVAL;
330 goto out;
331 }
332 memset(req, 0, sizeof(*req));
333
334 size = min(sizeof(*req), size);
335 memcpy(req, info->buffer.pointer, size);
336 DRM_DEBUG_DRIVER("SBIOS pending requests: %#x\n", req->pending);
337
338 count = hweight32(req->pending);
339
340 out:
341 kfree(info);
342 return count;
343 }
344
345 /**
346 * radeon_atif_handler - handle ATIF notify requests
347 *
348 * @rdev: radeon_device pointer
349 * @event: atif sbios request struct
350 *
351 * Checks the acpi event and if it matches an atif event,
352 * handles it.
353 * Returns NOTIFY code
354 */
radeon_atif_handler(struct radeon_device * rdev,struct acpi_bus_event * event)355 static int radeon_atif_handler(struct radeon_device *rdev,
356 struct acpi_bus_event *event)
357 {
358 struct radeon_atif *atif = &rdev->atif;
359 struct atif_sbios_requests req;
360 acpi_handle handle;
361 int count;
362
363 DRM_DEBUG_DRIVER("event, device_class = %s, type = %#x\n",
364 event->device_class, event->type);
365
366 if (strcmp(event->device_class, ACPI_VIDEO_CLASS) != 0)
367 return NOTIFY_DONE;
368
369 if (!atif->notification_cfg.enabled ||
370 event->type != atif->notification_cfg.command_code)
371 /* Not our event */
372 return NOTIFY_DONE;
373
374 /* Check pending SBIOS requests */
375 handle = ACPI_HANDLE(&rdev->pdev->dev);
376 count = radeon_atif_get_sbios_requests(handle, &req);
377
378 if (count <= 0)
379 return NOTIFY_DONE;
380
381 DRM_DEBUG_DRIVER("ATIF: %d pending SBIOS requests\n", count);
382
383 if (req.pending & ATIF_PANEL_BRIGHTNESS_CHANGE_REQUEST) {
384 struct radeon_encoder *enc = atif->encoder_for_bl;
385
386 if (enc) {
387 DRM_DEBUG_DRIVER("Changing brightness to %d\n",
388 req.backlight_level);
389
390 radeon_set_backlight_level(rdev, enc, req.backlight_level);
391
392 if (rdev->is_atom_bios) {
393 struct radeon_encoder_atom_dig *dig = enc->enc_priv;
394 backlight_force_update(dig->bl_dev,
395 BACKLIGHT_UPDATE_HOTKEY);
396 } else {
397 struct radeon_encoder_lvds *dig = enc->enc_priv;
398 backlight_force_update(dig->bl_dev,
399 BACKLIGHT_UPDATE_HOTKEY);
400 }
401 }
402 }
403 if (req.pending & ATIF_DGPU_DISPLAY_EVENT) {
404 if ((rdev->flags & RADEON_IS_PX) &&
405 radeon_atpx_dgpu_req_power_for_displays()) {
406 pm_runtime_get_sync(rdev_to_drm(rdev)->dev);
407 /* Just fire off a uevent and let userspace tell us what to do */
408 drm_helper_hpd_irq_event(rdev_to_drm(rdev));
409 pm_runtime_put_autosuspend(rdev_to_drm(rdev)->dev);
410 }
411 }
412 /* TODO: check other events */
413
414 /* We've handled the event, stop the notifier chain. The ACPI interface
415 * overloads ACPI_VIDEO_NOTIFY_PROBE, we don't want to send that to
416 * userspace if the event was generated only to signal a SBIOS
417 * request.
418 */
419 return NOTIFY_BAD;
420 }
421
422 /* Call the ATCS method
423 */
424 /**
425 * radeon_atcs_call - call an ATCS method
426 *
427 * @handle: acpi handle
428 * @function: the ATCS function to execute
429 * @params: ATCS function params
430 *
431 * Executes the requested ATCS function (all asics).
432 * Returns a pointer to the acpi output buffer.
433 */
radeon_atcs_call(acpi_handle handle,int function,struct acpi_buffer * params)434 static union acpi_object *radeon_atcs_call(acpi_handle handle, int function,
435 struct acpi_buffer *params)
436 {
437 acpi_status status;
438 union acpi_object atcs_arg_elements[2];
439 struct acpi_object_list atcs_arg;
440 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
441
442 atcs_arg.count = 2;
443 atcs_arg.pointer = &atcs_arg_elements[0];
444
445 atcs_arg_elements[0].type = ACPI_TYPE_INTEGER;
446 atcs_arg_elements[0].integer.value = function;
447
448 if (params) {
449 atcs_arg_elements[1].type = ACPI_TYPE_BUFFER;
450 atcs_arg_elements[1].buffer.length = params->length;
451 atcs_arg_elements[1].buffer.pointer = params->pointer;
452 } else {
453 /* We need a second fake parameter */
454 atcs_arg_elements[1].type = ACPI_TYPE_INTEGER;
455 atcs_arg_elements[1].integer.value = 0;
456 }
457
458 status = acpi_evaluate_object(handle, "ATCS", &atcs_arg, &buffer);
459
460 /* Fail only if calling the method fails and ATIF is supported */
461 if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) {
462 DRM_DEBUG_DRIVER("failed to evaluate ATCS got %s\n",
463 acpi_format_exception(status));
464 kfree(buffer.pointer);
465 return NULL;
466 }
467
468 return buffer.pointer;
469 }
470
471 /**
472 * radeon_atcs_parse_functions - parse supported functions
473 *
474 * @f: supported functions struct
475 * @mask: supported functions mask from ATCS
476 *
477 * Use the supported functions mask from ATCS function
478 * ATCS_FUNCTION_VERIFY_INTERFACE to determine what functions
479 * are supported (all asics).
480 */
radeon_atcs_parse_functions(struct radeon_atcs_functions * f,u32 mask)481 static void radeon_atcs_parse_functions(struct radeon_atcs_functions *f, u32 mask)
482 {
483 f->get_ext_state = mask & ATCS_GET_EXTERNAL_STATE_SUPPORTED;
484 f->pcie_perf_req = mask & ATCS_PCIE_PERFORMANCE_REQUEST_SUPPORTED;
485 f->pcie_dev_rdy = mask & ATCS_PCIE_DEVICE_READY_NOTIFICATION_SUPPORTED;
486 f->pcie_bus_width = mask & ATCS_SET_PCIE_BUS_WIDTH_SUPPORTED;
487 }
488
489 /**
490 * radeon_atcs_verify_interface - verify ATCS
491 *
492 * @handle: acpi handle
493 * @atcs: radeon atcs struct
494 *
495 * Execute the ATCS_FUNCTION_VERIFY_INTERFACE ATCS function
496 * to initialize ATCS and determine what features are supported
497 * (all asics).
498 * returns 0 on success, error on failure.
499 */
radeon_atcs_verify_interface(acpi_handle handle,struct radeon_atcs * atcs)500 static int radeon_atcs_verify_interface(acpi_handle handle,
501 struct radeon_atcs *atcs)
502 {
503 union acpi_object *info;
504 struct atcs_verify_interface output;
505 size_t size;
506 int err = 0;
507
508 info = radeon_atcs_call(handle, ATCS_FUNCTION_VERIFY_INTERFACE, NULL);
509 if (!info)
510 return -EIO;
511
512 memset(&output, 0, sizeof(output));
513
514 size = *(u16 *) info->buffer.pointer;
515 if (size < 8) {
516 DRM_INFO("ATCS buffer is too small: %zu\n", size);
517 err = -EINVAL;
518 goto out;
519 }
520 size = min(sizeof(output), size);
521
522 memcpy(&output, info->buffer.pointer, size);
523
524 /* TODO: check version? */
525 DRM_DEBUG_DRIVER("ATCS version %u\n", output.version);
526
527 radeon_atcs_parse_functions(&atcs->functions, output.function_bits);
528
529 out:
530 kfree(info);
531 return err;
532 }
533
534 /**
535 * radeon_acpi_is_pcie_performance_request_supported
536 *
537 * @rdev: radeon_device pointer
538 *
539 * Check if the ATCS pcie_perf_req and pcie_dev_rdy methods
540 * are supported (all asics).
541 * returns true if supported, false if not.
542 */
radeon_acpi_is_pcie_performance_request_supported(struct radeon_device * rdev)543 bool radeon_acpi_is_pcie_performance_request_supported(struct radeon_device *rdev)
544 {
545 struct radeon_atcs *atcs = &rdev->atcs;
546
547 if (atcs->functions.pcie_perf_req && atcs->functions.pcie_dev_rdy)
548 return true;
549
550 return false;
551 }
552
553 /**
554 * radeon_acpi_pcie_notify_device_ready
555 *
556 * @rdev: radeon_device pointer
557 *
558 * Executes the PCIE_DEVICE_READY_NOTIFICATION method
559 * (all asics).
560 * returns 0 on success, error on failure.
561 */
radeon_acpi_pcie_notify_device_ready(struct radeon_device * rdev)562 int radeon_acpi_pcie_notify_device_ready(struct radeon_device *rdev)
563 {
564 acpi_handle handle;
565 union acpi_object *info;
566 struct radeon_atcs *atcs = &rdev->atcs;
567
568 /* Get the device handle */
569 handle = ACPI_HANDLE(&rdev->pdev->dev);
570 if (!handle)
571 return -EINVAL;
572
573 if (!atcs->functions.pcie_dev_rdy)
574 return -EINVAL;
575
576 info = radeon_atcs_call(handle, ATCS_FUNCTION_PCIE_DEVICE_READY_NOTIFICATION, NULL);
577 if (!info)
578 return -EIO;
579
580 kfree(info);
581
582 return 0;
583 }
584
585 /**
586 * radeon_acpi_pcie_performance_request
587 *
588 * @rdev: radeon_device pointer
589 * @perf_req: requested perf level (pcie gen speed)
590 * @advertise: set advertise caps flag if set
591 *
592 * Executes the PCIE_PERFORMANCE_REQUEST method to
593 * change the pcie gen speed (all asics).
594 * returns 0 on success, error on failure.
595 */
radeon_acpi_pcie_performance_request(struct radeon_device * rdev,u8 perf_req,bool advertise)596 int radeon_acpi_pcie_performance_request(struct radeon_device *rdev,
597 u8 perf_req, bool advertise)
598 {
599 acpi_handle handle;
600 union acpi_object *info;
601 struct radeon_atcs *atcs = &rdev->atcs;
602 struct atcs_pref_req_input atcs_input;
603 struct atcs_pref_req_output atcs_output;
604 struct acpi_buffer params;
605 size_t size;
606 u32 retry = 3;
607
608 /* Get the device handle */
609 handle = ACPI_HANDLE(&rdev->pdev->dev);
610 if (!handle)
611 return -EINVAL;
612
613 if (!atcs->functions.pcie_perf_req)
614 return -EINVAL;
615
616 atcs_input.size = sizeof(struct atcs_pref_req_input);
617 /* client id (bit 2-0: func num, 7-3: dev num, 15-8: bus num) */
618 atcs_input.client_id = pci_dev_id(rdev->pdev);
619 atcs_input.valid_flags_mask = ATCS_VALID_FLAGS_MASK;
620 atcs_input.flags = ATCS_WAIT_FOR_COMPLETION;
621 if (advertise)
622 atcs_input.flags |= ATCS_ADVERTISE_CAPS;
623 atcs_input.req_type = ATCS_PCIE_LINK_SPEED;
624 atcs_input.perf_req = perf_req;
625
626 params.length = sizeof(struct atcs_pref_req_input);
627 params.pointer = &atcs_input;
628
629 while (retry--) {
630 info = radeon_atcs_call(handle, ATCS_FUNCTION_PCIE_PERFORMANCE_REQUEST, ¶ms);
631 if (!info)
632 return -EIO;
633
634 memset(&atcs_output, 0, sizeof(atcs_output));
635
636 size = *(u16 *) info->buffer.pointer;
637 if (size < 3) {
638 DRM_INFO("ATCS buffer is too small: %zu\n", size);
639 kfree(info);
640 return -EINVAL;
641 }
642 size = min(sizeof(atcs_output), size);
643
644 memcpy(&atcs_output, info->buffer.pointer, size);
645
646 kfree(info);
647
648 switch (atcs_output.ret_val) {
649 case ATCS_REQUEST_REFUSED:
650 default:
651 return -EINVAL;
652 case ATCS_REQUEST_COMPLETE:
653 return 0;
654 case ATCS_REQUEST_IN_PROGRESS:
655 udelay(10);
656 break;
657 }
658 }
659
660 return 0;
661 }
662
663 /**
664 * radeon_acpi_event - handle notify events
665 *
666 * @nb: notifier block
667 * @val: val
668 * @data: acpi event
669 *
670 * Calls relevant radeon functions in response to various
671 * acpi events.
672 * Returns NOTIFY code
673 */
radeon_acpi_event(struct notifier_block * nb,unsigned long val,void * data)674 static int radeon_acpi_event(struct notifier_block *nb,
675 unsigned long val,
676 void *data)
677 {
678 struct radeon_device *rdev = container_of(nb, struct radeon_device, acpi_nb);
679 struct acpi_bus_event *entry = (struct acpi_bus_event *)data;
680
681 if (strcmp(entry->device_class, ACPI_AC_CLASS) == 0) {
682 if (power_supply_is_system_supplied() > 0)
683 DRM_DEBUG_DRIVER("pm: AC\n");
684 else
685 DRM_DEBUG_DRIVER("pm: DC\n");
686
687 radeon_pm_acpi_event_handler(rdev);
688 }
689
690 /* Check for pending SBIOS requests */
691 return radeon_atif_handler(rdev, entry);
692 }
693
694 /* Call all ACPI methods here */
695 /**
696 * radeon_acpi_init - init driver acpi support
697 *
698 * @rdev: radeon_device pointer
699 *
700 * Verifies the AMD ACPI interfaces and registers with the acpi
701 * notifier chain (all asics).
702 * Returns 0 on success, error on failure.
703 */
radeon_acpi_init(struct radeon_device * rdev)704 int radeon_acpi_init(struct radeon_device *rdev)
705 {
706 acpi_handle handle;
707 struct radeon_atif *atif = &rdev->atif;
708 struct radeon_atcs *atcs = &rdev->atcs;
709 int ret;
710
711 /* Get the device handle */
712 handle = ACPI_HANDLE(&rdev->pdev->dev);
713
714 /* No need to proceed if we're sure that ATIF is not supported */
715 if (!ASIC_IS_AVIVO(rdev) || !rdev->bios || !handle)
716 return 0;
717
718 /* Call the ATCS method */
719 ret = radeon_atcs_verify_interface(handle, atcs);
720 if (ret) {
721 DRM_DEBUG_DRIVER("Call to ATCS verify_interface failed: %d\n", ret);
722 }
723
724 /* Call the ATIF method */
725 ret = radeon_atif_verify_interface(handle, atif);
726 if (ret) {
727 DRM_DEBUG_DRIVER("Call to ATIF verify_interface failed: %d\n", ret);
728 goto out;
729 }
730
731 if (atif->notifications.brightness_change) {
732 struct drm_encoder *tmp;
733 struct radeon_encoder *target = NULL;
734
735 /* Find the encoder controlling the brightness */
736 list_for_each_entry(tmp, &rdev_to_drm(rdev)->mode_config.encoder_list,
737 head) {
738 struct radeon_encoder *enc = to_radeon_encoder(tmp);
739
740 if ((enc->devices & (ATOM_DEVICE_LCD_SUPPORT)) &&
741 enc->enc_priv) {
742 if (rdev->is_atom_bios) {
743 struct radeon_encoder_atom_dig *dig = enc->enc_priv;
744 if (dig->bl_dev) {
745 target = enc;
746 break;
747 }
748 } else {
749 struct radeon_encoder_lvds *dig = enc->enc_priv;
750 if (dig->bl_dev) {
751 target = enc;
752 break;
753 }
754 }
755 }
756 }
757
758 atif->encoder_for_bl = target;
759 }
760
761 if (atif->functions.sbios_requests && !atif->functions.system_params) {
762 /* XXX check this workraround, if sbios request function is
763 * present we have to see how it's configured in the system
764 * params
765 */
766 atif->functions.system_params = true;
767 }
768
769 if (atif->functions.system_params) {
770 ret = radeon_atif_get_notification_params(handle,
771 &atif->notification_cfg);
772 if (ret) {
773 DRM_DEBUG_DRIVER("Call to GET_SYSTEM_PARAMS failed: %d\n",
774 ret);
775 /* Disable notification */
776 atif->notification_cfg.enabled = false;
777 }
778 }
779
780 out:
781 rdev->acpi_nb.notifier_call = radeon_acpi_event;
782 register_acpi_notifier(&rdev->acpi_nb);
783
784 return ret;
785 }
786
787 /**
788 * radeon_acpi_fini - tear down driver acpi support
789 *
790 * @rdev: radeon_device pointer
791 *
792 * Unregisters with the acpi notifier chain (all asics).
793 */
radeon_acpi_fini(struct radeon_device * rdev)794 void radeon_acpi_fini(struct radeon_device *rdev)
795 {
796 unregister_acpi_notifier(&rdev->acpi_nb);
797 }
798