1 /* $NetBSD: radeon_acpi.c,v 1.6 2024/04/18 23:33:15 riastradh Exp $ */
2
3 /*
4 * Copyright 2012 Advanced Micro Devices, Inc.
5 *
6 * Permission is hereby granted, free of charge, to any person obtaining a
7 * copy of this software and associated documentation files (the "Software"),
8 * to deal in the Software without restriction, including without limitation
9 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
10 * and/or sell copies of the Software, and to permit persons to whom the
11 * Software is furnished to do so, subject to the following conditions:
12 *
13 * The above copyright notice and this permission notice shall be included in
14 * all copies or substantial portions of the Software.
15 *
16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
19 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
20 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
21 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
22 * OTHER DEALINGS IN THE SOFTWARE.
23 *
24 */
25
26 #include <sys/cdefs.h>
27 __KERNEL_RCSID(0, "$NetBSD: radeon_acpi.c,v 1.6 2024/04/18 23:33:15 riastradh Exp $");
28
29 #include <linux/acpi.h>
30 #include <linux/pci.h>
31 #include <linux/pm_runtime.h>
32 #include <linux/power_supply.h>
33 #include <linux/slab.h>
34
35 #include <acpi/acpi_bus.h>
36 #include <acpi/video.h>
37
38 #include <drm/drm_crtc_helper.h>
39 #include <drm/drm_probe_helper.h>
40
41 #include "atom.h"
42 #include "radeon.h"
43 #include "radeon_acpi.h"
44
45 #ifdef __NetBSD__
46 #include <dev/acpi/acpi_pci.h>
47 #include <dev/acpi/acpireg.h>
48 #define _COMPONENT ACPI_DISPLAY_COMPONENT
49 ACPI_MODULE_NAME("radeon_acpi")
50 #include <linux/nbsd-namespace-acpi.h>
51 #endif
52
53 #ifndef __NetBSD__ /* XXX radeon acpi */
54 #if defined(CONFIG_VGA_SWITCHEROO)
55 bool radeon_atpx_dgpu_req_power_for_displays(void);
56 #else
57 static inline bool radeon_atpx_dgpu_req_power_for_displays(void) { return false; }
58 #endif
59 #endif
60
61 #define ACPI_AC_CLASS "ac_adapter"
62
63 extern void radeon_pm_acpi_event_handler(struct radeon_device *rdev);
64
65 struct atif_verify_interface {
66 u16 size; /* structure size in bytes (includes size field) */
67 u16 version; /* version */
68 u32 notification_mask; /* supported notifications mask */
69 u32 function_bits; /* supported functions bit vector */
70 } __packed;
71
72 struct atif_system_params {
73 u16 size; /* structure size in bytes (includes size field) */
74 u32 valid_mask; /* valid flags mask */
75 u32 flags; /* flags */
76 u8 command_code; /* notify command code */
77 } __packed;
78
79 struct atif_sbios_requests {
80 u16 size; /* structure size in bytes (includes size field) */
81 u32 pending; /* pending sbios requests */
82 u8 panel_exp_mode; /* panel expansion mode */
83 u8 thermal_gfx; /* thermal state: target gfx controller */
84 u8 thermal_state; /* thermal state: state id (0: exit state, non-0: state) */
85 u8 forced_power_gfx; /* forced power state: target gfx controller */
86 u8 forced_power_state; /* forced power state: state id */
87 u8 system_power_src; /* system power source */
88 u8 backlight_level; /* panel backlight level (0-255) */
89 } __packed;
90
91 #define ATIF_NOTIFY_MASK 0x3
92 #define ATIF_NOTIFY_NONE 0
93 #define ATIF_NOTIFY_81 1
94 #define ATIF_NOTIFY_N 2
95
96 struct atcs_verify_interface {
97 u16 size; /* structure size in bytes (includes size field) */
98 u16 version; /* version */
99 u32 function_bits; /* supported functions bit vector */
100 } __packed;
101
102 #define ATCS_VALID_FLAGS_MASK 0x3
103
104 struct atcs_pref_req_input {
105 u16 size; /* structure size in bytes (includes size field) */
106 u16 client_id; /* client id (bit 2-0: func num, 7-3: dev num, 15-8: bus num) */
107 u16 valid_flags_mask; /* valid flags mask */
108 u16 flags; /* flags */
109 u8 req_type; /* request type */
110 u8 perf_req; /* performance request */
111 } __packed;
112
113 struct atcs_pref_req_output {
114 u16 size; /* structure size in bytes (includes size field) */
115 u8 ret_val; /* return value */
116 } __packed;
117
118 /* Call the ATIF method
119 */
120 /**
121 * radeon_atif_call - call an ATIF method
122 *
123 * @handle: acpi handle
124 * @function: the ATIF function to execute
125 * @params: ATIF function params
126 *
127 * Executes the requested ATIF function (all asics).
128 * Returns a pointer to the acpi output buffer.
129 */
radeon_atif_call(acpi_handle handle,int function,struct acpi_buffer * params)130 static union acpi_object *radeon_atif_call(acpi_handle handle, int function,
131 struct acpi_buffer *params)
132 {
133 acpi_status status;
134 union acpi_object atif_arg_elements[2];
135 struct acpi_object_list atif_arg;
136 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
137
138 atif_arg.count = 2;
139 atif_arg.pointer = &atif_arg_elements[0];
140
141 atif_arg_elements[0].type = ACPI_TYPE_INTEGER;
142 atif_arg_elements[0].integer.value = function;
143
144 if (params) {
145 atif_arg_elements[1].type = ACPI_TYPE_BUFFER;
146 atif_arg_elements[1].buffer.length = params->length;
147 atif_arg_elements[1].buffer.pointer = params->pointer;
148 } else {
149 /* We need a second fake parameter */
150 atif_arg_elements[1].type = ACPI_TYPE_INTEGER;
151 atif_arg_elements[1].integer.value = 0;
152 }
153
154 status = acpi_evaluate_object(handle, "ATIF", &atif_arg, &buffer);
155
156 /* Fail only if calling the method fails and ATIF is supported */
157 if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) {
158 DRM_DEBUG_DRIVER("failed to evaluate ATIF got %s\n",
159 acpi_format_exception(status));
160 ACPI_FREE(buffer.pointer);
161 return NULL;
162 }
163
164 return buffer.pointer;
165 }
166
167 /**
168 * radeon_atif_parse_notification - parse supported notifications
169 *
170 * @n: supported notifications struct
171 * @mask: supported notifications mask from ATIF
172 *
173 * Use the supported notifications mask from ATIF function
174 * ATIF_FUNCTION_VERIFY_INTERFACE to determine what notifications
175 * are supported (all asics).
176 */
radeon_atif_parse_notification(struct radeon_atif_notifications * n,u32 mask)177 static void radeon_atif_parse_notification(struct radeon_atif_notifications *n, u32 mask)
178 {
179 n->display_switch = mask & ATIF_DISPLAY_SWITCH_REQUEST_SUPPORTED;
180 n->expansion_mode_change = mask & ATIF_EXPANSION_MODE_CHANGE_REQUEST_SUPPORTED;
181 n->thermal_state = mask & ATIF_THERMAL_STATE_CHANGE_REQUEST_SUPPORTED;
182 n->forced_power_state = mask & ATIF_FORCED_POWER_STATE_CHANGE_REQUEST_SUPPORTED;
183 n->system_power_state = mask & ATIF_SYSTEM_POWER_SOURCE_CHANGE_REQUEST_SUPPORTED;
184 n->display_conf_change = mask & ATIF_DISPLAY_CONF_CHANGE_REQUEST_SUPPORTED;
185 n->px_gfx_switch = mask & ATIF_PX_GFX_SWITCH_REQUEST_SUPPORTED;
186 n->brightness_change = mask & ATIF_PANEL_BRIGHTNESS_CHANGE_REQUEST_SUPPORTED;
187 n->dgpu_display_event = mask & ATIF_DGPU_DISPLAY_EVENT_SUPPORTED;
188 }
189
190 /**
191 * radeon_atif_parse_functions - parse supported functions
192 *
193 * @f: supported functions struct
194 * @mask: supported functions mask from ATIF
195 *
196 * Use the supported functions mask from ATIF function
197 * ATIF_FUNCTION_VERIFY_INTERFACE to determine what functions
198 * are supported (all asics).
199 */
radeon_atif_parse_functions(struct radeon_atif_functions * f,u32 mask)200 static void radeon_atif_parse_functions(struct radeon_atif_functions *f, u32 mask)
201 {
202 f->system_params = mask & ATIF_GET_SYSTEM_PARAMETERS_SUPPORTED;
203 f->sbios_requests = mask & ATIF_GET_SYSTEM_BIOS_REQUESTS_SUPPORTED;
204 f->select_active_disp = mask & ATIF_SELECT_ACTIVE_DISPLAYS_SUPPORTED;
205 f->lid_state = mask & ATIF_GET_LID_STATE_SUPPORTED;
206 f->get_tv_standard = mask & ATIF_GET_TV_STANDARD_FROM_CMOS_SUPPORTED;
207 f->set_tv_standard = mask & ATIF_SET_TV_STANDARD_IN_CMOS_SUPPORTED;
208 f->get_panel_expansion_mode = mask & ATIF_GET_PANEL_EXPANSION_MODE_FROM_CMOS_SUPPORTED;
209 f->set_panel_expansion_mode = mask & ATIF_SET_PANEL_EXPANSION_MODE_IN_CMOS_SUPPORTED;
210 f->temperature_change = mask & ATIF_TEMPERATURE_CHANGE_NOTIFICATION_SUPPORTED;
211 f->graphics_device_types = mask & ATIF_GET_GRAPHICS_DEVICE_TYPES_SUPPORTED;
212 }
213
214 /**
215 * radeon_atif_verify_interface - verify ATIF
216 *
217 * @handle: acpi handle
218 * @atif: radeon atif struct
219 *
220 * Execute the ATIF_FUNCTION_VERIFY_INTERFACE ATIF function
221 * to initialize ATIF and determine what features are supported
222 * (all asics).
223 * returns 0 on success, error on failure.
224 */
radeon_atif_verify_interface(acpi_handle handle,struct radeon_atif * atif)225 static int radeon_atif_verify_interface(acpi_handle handle,
226 struct radeon_atif *atif)
227 {
228 union acpi_object *info;
229 struct atif_verify_interface output;
230 size_t size;
231 int err = 0;
232
233 info = radeon_atif_call(handle, ATIF_FUNCTION_VERIFY_INTERFACE, NULL);
234 if (!info)
235 return -EIO;
236
237 memset(&output, 0, sizeof(output));
238
239 size = *(u16 *) info->buffer.pointer;
240 if (size < 12) {
241 DRM_INFO("ATIF buffer is too small: %zu\n", size);
242 err = -EINVAL;
243 goto out;
244 }
245 size = min(sizeof(output), size);
246
247 memcpy(&output, info->buffer.pointer, size);
248
249 /* TODO: check version? */
250 DRM_DEBUG_DRIVER("ATIF version %u\n", output.version);
251
252 radeon_atif_parse_notification(&atif->notifications, output.notification_mask);
253 radeon_atif_parse_functions(&atif->functions, output.function_bits);
254
255 out:
256 ACPI_FREE(info);
257 return err;
258 }
259
260 /**
261 * radeon_atif_get_notification_params - determine notify configuration
262 *
263 * @handle: acpi handle
264 * @n: atif notification configuration struct
265 *
266 * Execute the ATIF_FUNCTION_GET_SYSTEM_PARAMETERS ATIF function
267 * to determine if a notifier is used and if so which one
268 * (all asics). This is either Notify(VGA, 0x81) or Notify(VGA, n)
269 * where n is specified in the result if a notifier is used.
270 * Returns 0 on success, error on failure.
271 */
radeon_atif_get_notification_params(acpi_handle handle,struct radeon_atif_notification_cfg * n)272 static int radeon_atif_get_notification_params(acpi_handle handle,
273 struct radeon_atif_notification_cfg *n)
274 {
275 union acpi_object *info;
276 struct atif_system_params params;
277 size_t size;
278 int err = 0;
279
280 info = radeon_atif_call(handle, ATIF_FUNCTION_GET_SYSTEM_PARAMETERS, NULL);
281 if (!info) {
282 err = -EIO;
283 goto out;
284 }
285
286 size = *(u16 *) info->buffer.pointer;
287 if (size < 10) {
288 err = -EINVAL;
289 goto out;
290 }
291
292 memset(¶ms, 0, sizeof(params));
293 size = min(sizeof(params), size);
294 memcpy(¶ms, info->buffer.pointer, size);
295
296 DRM_DEBUG_DRIVER("SYSTEM_PARAMS: mask = %#x, flags = %#x\n",
297 params.flags, params.valid_mask);
298 params.flags = params.flags & params.valid_mask;
299
300 if ((params.flags & ATIF_NOTIFY_MASK) == ATIF_NOTIFY_NONE) {
301 n->enabled = false;
302 n->command_code = 0;
303 } else if ((params.flags & ATIF_NOTIFY_MASK) == ATIF_NOTIFY_81) {
304 n->enabled = true;
305 n->command_code = 0x81;
306 } else {
307 if (size < 11) {
308 err = -EINVAL;
309 goto out;
310 }
311 n->enabled = true;
312 n->command_code = params.command_code;
313 }
314
315 out:
316 DRM_DEBUG_DRIVER("Notification %s, command code = %#x\n",
317 (n->enabled ? "enabled" : "disabled"),
318 n->command_code);
319 ACPI_FREE(info);
320 return err;
321 }
322
323 #ifndef __NetBSD__ /* XXX radeon acpi */
324
325 /**
326 * radeon_atif_get_sbios_requests - get requested sbios event
327 *
328 * @handle: acpi handle
329 * @req: atif sbios request struct
330 *
331 * Execute the ATIF_FUNCTION_GET_SYSTEM_BIOS_REQUESTS ATIF function
332 * to determine what requests the sbios is making to the driver
333 * (all asics).
334 * Returns 0 on success, error on failure.
335 */
radeon_atif_get_sbios_requests(acpi_handle handle,struct atif_sbios_requests * req)336 static int radeon_atif_get_sbios_requests(acpi_handle handle,
337 struct atif_sbios_requests *req)
338 {
339 union acpi_object *info;
340 size_t size;
341 int count = 0;
342
343 info = radeon_atif_call(handle, ATIF_FUNCTION_GET_SYSTEM_BIOS_REQUESTS, NULL);
344 if (!info)
345 return -EIO;
346
347 size = *(u16 *)info->buffer.pointer;
348 if (size < 0xd) {
349 count = -EINVAL;
350 goto out;
351 }
352 memset(req, 0, sizeof(*req));
353
354 size = min(sizeof(*req), size);
355 memcpy(req, info->buffer.pointer, size);
356 DRM_DEBUG_DRIVER("SBIOS pending requests: %#x\n", req->pending);
357
358 count = hweight32(req->pending);
359
360 out:
361 ACPI_FREE(info);
362 return count;
363 }
364
365 /**
366 * radeon_atif_handler - handle ATIF notify requests
367 *
368 * @rdev: radeon_device pointer
369 * @event: atif sbios request struct
370 *
371 * Checks the acpi event and if it matches an atif event,
372 * handles it.
373 * Returns NOTIFY code
374 */
radeon_atif_handler(struct radeon_device * rdev,struct acpi_bus_event * event)375 static int radeon_atif_handler(struct radeon_device *rdev,
376 struct acpi_bus_event *event)
377 {
378 struct radeon_atif *atif = &rdev->atif;
379 struct atif_sbios_requests req;
380 acpi_handle handle;
381 int count;
382
383 DRM_DEBUG_DRIVER("event, device_class = %s, type = %#x\n",
384 event->device_class, event->type);
385
386 if (strcmp(event->device_class, ACPI_VIDEO_CLASS) != 0)
387 return NOTIFY_DONE;
388
389 if (!atif->notification_cfg.enabled ||
390 event->type != atif->notification_cfg.command_code)
391 /* Not our event */
392 return NOTIFY_DONE;
393
394 /* Check pending SBIOS requests */
395 handle = ACPI_HANDLE(&rdev->pdev->dev);
396 count = radeon_atif_get_sbios_requests(handle, &req);
397
398 if (count <= 0)
399 return NOTIFY_DONE;
400
401 DRM_DEBUG_DRIVER("ATIF: %d pending SBIOS requests\n", count);
402
403 if (req.pending & ATIF_PANEL_BRIGHTNESS_CHANGE_REQUEST) {
404 struct radeon_encoder *enc = atif->encoder_for_bl;
405
406 if (enc) {
407 DRM_DEBUG_DRIVER("Changing brightness to %d\n",
408 req.backlight_level);
409
410 radeon_set_backlight_level(rdev, enc, req.backlight_level);
411
412 #if defined(CONFIG_BACKLIGHT_CLASS_DEVICE) || defined(CONFIG_BACKLIGHT_CLASS_DEVICE_MODULE)
413 if (rdev->is_atom_bios) {
414 struct radeon_encoder_atom_dig *dig = enc->enc_priv;
415 backlight_force_update(dig->bl_dev,
416 BACKLIGHT_UPDATE_HOTKEY);
417 } else {
418 struct radeon_encoder_lvds *dig = enc->enc_priv;
419 backlight_force_update(dig->bl_dev,
420 BACKLIGHT_UPDATE_HOTKEY);
421 }
422 #endif
423 }
424 }
425 if (req.pending & ATIF_DGPU_DISPLAY_EVENT) {
426 if ((rdev->flags & RADEON_IS_PX) &&
427 radeon_atpx_dgpu_req_power_for_displays()) {
428 pm_runtime_get_sync(rdev->ddev->dev);
429 /* Just fire off a uevent and let userspace tell us what to do */
430 drm_helper_hpd_irq_event(rdev->ddev);
431 pm_runtime_mark_last_busy(rdev->ddev->dev);
432 pm_runtime_put_autosuspend(rdev->ddev->dev);
433 }
434 }
435 /* TODO: check other events */
436
437 /* We've handled the event, stop the notifier chain. The ACPI interface
438 * overloads ACPI_VIDEO_NOTIFY_PROBE, we don't want to send that to
439 * userspace if the event was generated only to signal a SBIOS
440 * request.
441 */
442 return NOTIFY_BAD;
443 }
444
445 #endif /* __NetBSD__ */
446
447 /* Call the ATCS method
448 */
449 /**
450 * radeon_atcs_call - call an ATCS method
451 *
452 * @handle: acpi handle
453 * @function: the ATCS function to execute
454 * @params: ATCS function params
455 *
456 * Executes the requested ATCS function (all asics).
457 * Returns a pointer to the acpi output buffer.
458 */
radeon_atcs_call(acpi_handle handle,int function,struct acpi_buffer * params)459 static union acpi_object *radeon_atcs_call(acpi_handle handle, int function,
460 struct acpi_buffer *params)
461 {
462 acpi_status status;
463 union acpi_object atcs_arg_elements[2];
464 struct acpi_object_list atcs_arg;
465 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
466
467 atcs_arg.count = 2;
468 atcs_arg.pointer = &atcs_arg_elements[0];
469
470 atcs_arg_elements[0].type = ACPI_TYPE_INTEGER;
471 atcs_arg_elements[0].integer.value = function;
472
473 if (params) {
474 atcs_arg_elements[1].type = ACPI_TYPE_BUFFER;
475 atcs_arg_elements[1].buffer.length = params->length;
476 atcs_arg_elements[1].buffer.pointer = params->pointer;
477 } else {
478 /* We need a second fake parameter */
479 atcs_arg_elements[1].type = ACPI_TYPE_INTEGER;
480 atcs_arg_elements[1].integer.value = 0;
481 }
482
483 status = acpi_evaluate_object(handle, "ATCS", &atcs_arg, &buffer);
484
485 /* Fail only if calling the method fails and ATIF is supported */
486 if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) {
487 DRM_DEBUG_DRIVER("failed to evaluate ATCS got %s\n",
488 acpi_format_exception(status));
489 ACPI_FREE(buffer.pointer);
490 return NULL;
491 }
492
493 return buffer.pointer;
494 }
495
496 /**
497 * radeon_atcs_parse_functions - parse supported functions
498 *
499 * @f: supported functions struct
500 * @mask: supported functions mask from ATCS
501 *
502 * Use the supported functions mask from ATCS function
503 * ATCS_FUNCTION_VERIFY_INTERFACE to determine what functions
504 * are supported (all asics).
505 */
radeon_atcs_parse_functions(struct radeon_atcs_functions * f,u32 mask)506 static void radeon_atcs_parse_functions(struct radeon_atcs_functions *f, u32 mask)
507 {
508 f->get_ext_state = mask & ATCS_GET_EXTERNAL_STATE_SUPPORTED;
509 f->pcie_perf_req = mask & ATCS_PCIE_PERFORMANCE_REQUEST_SUPPORTED;
510 f->pcie_dev_rdy = mask & ATCS_PCIE_DEVICE_READY_NOTIFICATION_SUPPORTED;
511 f->pcie_bus_width = mask & ATCS_SET_PCIE_BUS_WIDTH_SUPPORTED;
512 }
513
514 /**
515 * radeon_atcs_verify_interface - verify ATCS
516 *
517 * @handle: acpi handle
518 * @atcs: radeon atcs struct
519 *
520 * Execute the ATCS_FUNCTION_VERIFY_INTERFACE ATCS function
521 * to initialize ATCS and determine what features are supported
522 * (all asics).
523 * returns 0 on success, error on failure.
524 */
radeon_atcs_verify_interface(acpi_handle handle,struct radeon_atcs * atcs)525 static int radeon_atcs_verify_interface(acpi_handle handle,
526 struct radeon_atcs *atcs)
527 {
528 union acpi_object *info;
529 struct atcs_verify_interface output;
530 size_t size;
531 int err = 0;
532
533 info = radeon_atcs_call(handle, ATCS_FUNCTION_VERIFY_INTERFACE, NULL);
534 if (!info)
535 return -EIO;
536
537 memset(&output, 0, sizeof(output));
538
539 size = *(u16 *) info->buffer.pointer;
540 if (size < 8) {
541 DRM_INFO("ATCS buffer is too small: %zu\n", size);
542 err = -EINVAL;
543 goto out;
544 }
545 size = min(sizeof(output), size);
546
547 memcpy(&output, info->buffer.pointer, size);
548
549 /* TODO: check version? */
550 DRM_DEBUG_DRIVER("ATCS version %u\n", output.version);
551
552 radeon_atcs_parse_functions(&atcs->functions, output.function_bits);
553
554 out:
555 ACPI_FREE(info);
556 return err;
557 }
558
559 /**
560 * radeon_acpi_is_pcie_performance_request_supported
561 *
562 * @rdev: radeon_device pointer
563 *
564 * Check if the ATCS pcie_perf_req and pcie_dev_rdy methods
565 * are supported (all asics).
566 * returns true if supported, false if not.
567 */
radeon_acpi_is_pcie_performance_request_supported(struct radeon_device * rdev)568 bool radeon_acpi_is_pcie_performance_request_supported(struct radeon_device *rdev)
569 {
570 struct radeon_atcs *atcs = &rdev->atcs;
571
572 if (atcs->functions.pcie_perf_req && atcs->functions.pcie_dev_rdy)
573 return true;
574
575 return false;
576 }
577
578 /**
579 * radeon_acpi_pcie_notify_device_ready
580 *
581 * @rdev: radeon_device pointer
582 *
583 * Executes the PCIE_DEVICE_READY_NOTIFICATION method
584 * (all asics).
585 * returns 0 on success, error on failure.
586 */
radeon_acpi_pcie_notify_device_ready(struct radeon_device * rdev)587 int radeon_acpi_pcie_notify_device_ready(struct radeon_device *rdev)
588 {
589 acpi_handle handle;
590 union acpi_object *info;
591 struct radeon_atcs *atcs = &rdev->atcs;
592
593 /* Get the device handle */
594 #ifdef __NetBSD__
595 const struct pci_attach_args *pa = &rdev->pdev->pd_pa;
596 struct acpi_devnode *const d =
597 acpi_pcidev_find(pci_get_segment(pa->pa_pc),
598 pa->pa_bus, pa->pa_device, pa->pa_function);
599 if (d == NULL)
600 return -EINVAL;
601 handle = d->ad_handle;
602 #else
603 handle = ACPI_HANDLE(&rdev->pdev->dev);
604 #endif
605 if (!handle)
606 return -EINVAL;
607
608 if (!atcs->functions.pcie_dev_rdy)
609 return -EINVAL;
610
611 info = radeon_atcs_call(handle, ATCS_FUNCTION_PCIE_DEVICE_READY_NOTIFICATION, NULL);
612 if (!info)
613 return -EIO;
614
615 ACPI_FREE(info);
616
617 return 0;
618 }
619
620 /**
621 * radeon_acpi_pcie_performance_request
622 *
623 * @rdev: radeon_device pointer
624 * @perf_req: requested perf level (pcie gen speed)
625 * @advertise: set advertise caps flag if set
626 *
627 * Executes the PCIE_PERFORMANCE_REQUEST method to
628 * change the pcie gen speed (all asics).
629 * returns 0 on success, error on failure.
630 */
radeon_acpi_pcie_performance_request(struct radeon_device * rdev,u8 perf_req,bool advertise)631 int radeon_acpi_pcie_performance_request(struct radeon_device *rdev,
632 u8 perf_req, bool advertise)
633 {
634 acpi_handle handle;
635 union acpi_object *info;
636 struct radeon_atcs *atcs = &rdev->atcs;
637 struct atcs_pref_req_input atcs_input;
638 struct atcs_pref_req_output atcs_output;
639 struct acpi_buffer params;
640 size_t size;
641 u32 retry = 3;
642
643 /* Get the device handle */
644 #ifdef __NetBSD__
645 const struct pci_attach_args *pa = &rdev->pdev->pd_pa;
646 struct acpi_devnode *const d =
647 acpi_pcidev_find(pci_get_segment(pa->pa_pc),
648 pa->pa_bus, pa->pa_device, pa->pa_function);
649 if (d == NULL)
650 return -EINVAL;
651 handle = d->ad_handle;
652 #else
653 handle = ACPI_HANDLE(&rdev->pdev->dev);
654 #endif
655 if (!handle)
656 return -EINVAL;
657
658 if (!atcs->functions.pcie_perf_req)
659 return -EINVAL;
660
661 atcs_input.size = sizeof(struct atcs_pref_req_input);
662 /* client id (bit 2-0: func num, 7-3: dev num, 15-8: bus num) */
663 atcs_input.client_id = rdev->pdev->devfn | (rdev->pdev->bus->number << 8);
664 atcs_input.valid_flags_mask = ATCS_VALID_FLAGS_MASK;
665 atcs_input.flags = ATCS_WAIT_FOR_COMPLETION;
666 if (advertise)
667 atcs_input.flags |= ATCS_ADVERTISE_CAPS;
668 atcs_input.req_type = ATCS_PCIE_LINK_SPEED;
669 atcs_input.perf_req = perf_req;
670
671 params.length = sizeof(struct atcs_pref_req_input);
672 params.pointer = &atcs_input;
673
674 while (retry--) {
675 info = radeon_atcs_call(handle, ATCS_FUNCTION_PCIE_PERFORMANCE_REQUEST, ¶ms);
676 if (!info)
677 return -EIO;
678
679 memset(&atcs_output, 0, sizeof(atcs_output));
680
681 size = *(u16 *) info->buffer.pointer;
682 if (size < 3) {
683 DRM_INFO("ATCS buffer is too small: %zu\n", size);
684 ACPI_FREE(info);
685 return -EINVAL;
686 }
687 size = min(sizeof(atcs_output), size);
688
689 memcpy(&atcs_output, info->buffer.pointer, size);
690
691 ACPI_FREE(info);
692
693 switch (atcs_output.ret_val) {
694 case ATCS_REQUEST_REFUSED:
695 default:
696 return -EINVAL;
697 case ATCS_REQUEST_COMPLETE:
698 return 0;
699 case ATCS_REQUEST_IN_PROGRESS:
700 udelay(10);
701 break;
702 }
703 }
704
705 return 0;
706 }
707
708 /**
709 * radeon_acpi_event - handle notify events
710 *
711 * @nb: notifier block
712 * @val: val
713 * @data: acpi event
714 *
715 * Calls relevant radeon functions in response to various
716 * acpi events.
717 * Returns NOTIFY code
718 */
719 #ifndef __NetBSD__ /* XXX radeon acpi */
radeon_acpi_event(struct notifier_block * nb,unsigned long val,void * data)720 static int radeon_acpi_event(struct notifier_block *nb,
721 unsigned long val,
722 void *data)
723 {
724 struct radeon_device *rdev = container_of(nb, struct radeon_device, acpi_nb);
725 struct acpi_bus_event *entry = (struct acpi_bus_event *)data;
726
727 if (strcmp(entry->device_class, ACPI_AC_CLASS) == 0) {
728 if (power_supply_is_system_supplied() > 0)
729 DRM_DEBUG_DRIVER("pm: AC\n");
730 else
731 DRM_DEBUG_DRIVER("pm: DC\n");
732
733 radeon_pm_acpi_event_handler(rdev);
734 }
735
736 /* Check for pending SBIOS requests */
737 return radeon_atif_handler(rdev, entry);
738 }
739 #endif
740
741 /* Call all ACPI methods here */
742 /**
743 * radeon_acpi_init - init driver acpi support
744 *
745 * @rdev: radeon_device pointer
746 *
747 * Verifies the AMD ACPI interfaces and registers with the acpi
748 * notifier chain (all asics).
749 * Returns 0 on success, error on failure.
750 */
radeon_acpi_init(struct radeon_device * rdev)751 int radeon_acpi_init(struct radeon_device *rdev)
752 {
753 acpi_handle handle;
754 struct radeon_atif *atif = &rdev->atif;
755 struct radeon_atcs *atcs = &rdev->atcs;
756 int ret;
757
758 /* Get the device handle */
759 #ifdef __NetBSD__
760 const struct pci_attach_args *pa = &rdev->pdev->pd_pa;
761 struct acpi_devnode *const d =
762 acpi_pcidev_find(pci_get_segment(pa->pa_pc),
763 pa->pa_bus, pa->pa_device, pa->pa_function);
764 if (d == NULL)
765 return -EINVAL;
766 handle = d->ad_handle;
767 #else
768 handle = ACPI_HANDLE(&rdev->pdev->dev);
769 #endif
770
771 /* No need to proceed if we're sure that ATIF is not supported */
772 if (!ASIC_IS_AVIVO(rdev) || !rdev->bios || !handle)
773 return 0;
774
775 /* Call the ATCS method */
776 ret = radeon_atcs_verify_interface(handle, atcs);
777 if (ret) {
778 DRM_DEBUG_DRIVER("Call to ATCS verify_interface failed: %d\n", ret);
779 }
780
781 /* Call the ATIF method */
782 ret = radeon_atif_verify_interface(handle, atif);
783 if (ret) {
784 DRM_DEBUG_DRIVER("Call to ATIF verify_interface failed: %d\n", ret);
785 goto out;
786 }
787
788 if (atif->notifications.brightness_change) {
789 struct drm_encoder *tmp;
790 struct radeon_encoder *target = NULL;
791
792 /* Find the encoder controlling the brightness */
793 list_for_each_entry(tmp, &rdev->ddev->mode_config.encoder_list,
794 head) {
795 struct radeon_encoder *enc = to_radeon_encoder(tmp);
796
797 if ((enc->devices & (ATOM_DEVICE_LCD_SUPPORT)) &&
798 enc->enc_priv) {
799 if (rdev->is_atom_bios) {
800 struct radeon_encoder_atom_dig *dig = enc->enc_priv;
801 if (dig->bl_dev) {
802 target = enc;
803 break;
804 }
805 } else {
806 struct radeon_encoder_lvds *dig = enc->enc_priv;
807 if (dig->bl_dev) {
808 target = enc;
809 break;
810 }
811 }
812 }
813 }
814
815 atif->encoder_for_bl = target;
816 }
817
818 if (atif->functions.sbios_requests && !atif->functions.system_params) {
819 /* XXX check this workraround, if sbios request function is
820 * present we have to see how it's configured in the system
821 * params
822 */
823 atif->functions.system_params = true;
824 }
825
826 if (atif->functions.system_params) {
827 ret = radeon_atif_get_notification_params(handle,
828 &atif->notification_cfg);
829 if (ret) {
830 DRM_DEBUG_DRIVER("Call to GET_SYSTEM_PARAMS failed: %d\n",
831 ret);
832 /* Disable notification */
833 atif->notification_cfg.enabled = false;
834 }
835 }
836
837 out:
838 #ifndef __NetBSD__ /* XXX radeon acpi */
839 rdev->acpi_nb.notifier_call = radeon_acpi_event;
840 register_acpi_notifier(&rdev->acpi_nb);
841 #endif
842
843 return ret;
844 }
845
846 /**
847 * radeon_acpi_fini - tear down driver acpi support
848 *
849 * @rdev: radeon_device pointer
850 *
851 * Unregisters with the acpi notifier chain (all asics).
852 */
radeon_acpi_fini(struct radeon_device * rdev)853 void radeon_acpi_fini(struct radeon_device *rdev)
854 {
855 #ifndef __NetBSD__ /* XXX radeon acpi */
856 unregister_acpi_notifier(&rdev->acpi_nb);
857 #endif
858 }
859