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