blob: 196d28d995705f408fe817a08093abad3e370626 [file] [log] [blame]
Alex Deucherefd4e412012-07-31 17:18:17 -04001/*
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
Alberto Miloned7a29522010-07-06 11:40:24 -040024#include <linux/pci.h>
25#include <linux/acpi.h>
26#include <linux/slab.h>
Alex Deucherc4917072012-07-31 17:14:35 -040027#include <linux/power_supply.h>
Alberto Miloned7a29522010-07-06 11:40:24 -040028#include <acpi/acpi_drivers.h>
29#include <acpi/acpi_bus.h>
Luca Tettamantifda4b252012-07-30 21:20:35 +020030#include <acpi/video.h>
Alberto Miloned7a29522010-07-06 11:40:24 -040031
David Howells760285e2012-10-02 18:01:07 +010032#include <drm/drmP.h>
33#include <drm/drm_crtc_helper.h>
Alberto Miloned7a29522010-07-06 11:40:24 -040034#include "radeon.h"
Alex Deucher9e05b2f2012-07-18 13:28:52 -040035#include "radeon_acpi.h"
Luca Tettamantifda4b252012-07-30 21:20:35 +020036#include "atom.h"
Alberto Miloned7a29522010-07-06 11:40:24 -040037
38#include <linux/vga_switcheroo.h>
39
Alex Deucherc4917072012-07-31 17:14:35 -040040#define ACPI_AC_CLASS "ac_adapter"
41
42extern void radeon_pm_acpi_event_handler(struct radeon_device *rdev);
43
Luca Tettamantifd64ca82012-08-16 11:11:18 -040044struct atif_verify_interface {
45 u16 size; /* structure size in bytes (includes size field) */
46 u16 version; /* version */
47 u32 notification_mask; /* supported notifications mask */
48 u32 function_bits; /* supported functions bit vector */
49} __packed;
50
Luca Tettamantice3cf822012-07-30 21:16:06 +020051struct atif_system_params {
Luca Tettamantifda4b252012-07-30 21:20:35 +020052 u16 size; /* structure size in bytes (includes size field) */
53 u32 valid_mask; /* valid flags mask */
54 u32 flags; /* flags */
55 u8 command_code; /* notify command code */
56} __packed;
57
58struct atif_sbios_requests {
59 u16 size; /* structure size in bytes (includes size field) */
60 u32 pending; /* pending sbios requests */
61 u8 panel_exp_mode; /* panel expansion mode */
62 u8 thermal_gfx; /* thermal state: target gfx controller */
63 u8 thermal_state; /* thermal state: state id (0: exit state, non-0: state) */
64 u8 forced_power_gfx; /* forced power state: target gfx controller */
65 u8 forced_power_state; /* forced power state: state id */
66 u8 system_power_src; /* system power source */
67 u8 backlight_level; /* panel backlight level (0-255) */
Luca Tettamantice3cf822012-07-30 21:16:06 +020068} __packed;
69
70#define ATIF_NOTIFY_MASK 0x3
71#define ATIF_NOTIFY_NONE 0
72#define ATIF_NOTIFY_81 1
73#define ATIF_NOTIFY_N 2
74
Alex Deuchere3a15922012-08-16 11:13:43 -040075struct atcs_verify_interface {
76 u16 size; /* structure size in bytes (includes size field) */
77 u16 version; /* version */
78 u32 function_bits; /* supported functions bit vector */
79} __packed;
80
Alberto Miloned7a29522010-07-06 11:40:24 -040081/* Call the ATIF method
Alberto Miloned7a29522010-07-06 11:40:24 -040082 */
Alex Deucherc3c65162012-08-02 12:30:49 -040083/**
84 * radeon_atif_call - call an ATIF method
85 *
86 * @handle: acpi handle
87 * @function: the ATIF function to execute
88 * @params: ATIF function params
89 *
90 * Executes the requested ATIF function (all asics).
91 * Returns a pointer to the acpi output buffer.
92 */
Luca Tettamanti86504672012-07-29 17:04:43 +020093static union acpi_object *radeon_atif_call(acpi_handle handle, int function,
94 struct acpi_buffer *params)
Alberto Miloned7a29522010-07-06 11:40:24 -040095{
96 acpi_status status;
97 union acpi_object atif_arg_elements[2];
98 struct acpi_object_list atif_arg;
Luca Tettamanti86504672012-07-29 17:04:43 +020099 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
Alberto Miloned7a29522010-07-06 11:40:24 -0400100
101 atif_arg.count = 2;
102 atif_arg.pointer = &atif_arg_elements[0];
103
104 atif_arg_elements[0].type = ACPI_TYPE_INTEGER;
Luca Tettamanti86504672012-07-29 17:04:43 +0200105 atif_arg_elements[0].integer.value = function;
106
107 if (params) {
108 atif_arg_elements[1].type = ACPI_TYPE_BUFFER;
109 atif_arg_elements[1].buffer.length = params->length;
110 atif_arg_elements[1].buffer.pointer = params->pointer;
111 } else {
112 /* We need a second fake parameter */
113 atif_arg_elements[1].type = ACPI_TYPE_INTEGER;
114 atif_arg_elements[1].integer.value = 0;
115 }
Alberto Miloned7a29522010-07-06 11:40:24 -0400116
117 status = acpi_evaluate_object(handle, "ATIF", &atif_arg, &buffer);
118
119 /* Fail only if calling the method fails and ATIF is supported */
120 if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) {
Jean Delvarebc96f942011-11-30 17:26:36 +0100121 DRM_DEBUG_DRIVER("failed to evaluate ATIF got %s\n",
122 acpi_format_exception(status));
Alberto Miloned7a29522010-07-06 11:40:24 -0400123 kfree(buffer.pointer);
Luca Tettamanti86504672012-07-29 17:04:43 +0200124 return NULL;
Alberto Miloned7a29522010-07-06 11:40:24 -0400125 }
126
Luca Tettamanti86504672012-07-29 17:04:43 +0200127 return buffer.pointer;
Alberto Miloned7a29522010-07-06 11:40:24 -0400128}
129
Alex Deucherc3c65162012-08-02 12:30:49 -0400130/**
131 * radeon_atif_parse_notification - parse supported notifications
132 *
133 * @n: supported notifications struct
134 * @mask: supported notifications mask from ATIF
135 *
136 * Use the supported notifications mask from ATIF function
137 * ATIF_FUNCTION_VERIFY_INTERFACE to determine what notifications
138 * are supported (all asics).
139 */
Luca Tettamantifd64ca82012-08-16 11:11:18 -0400140static void radeon_atif_parse_notification(struct radeon_atif_notifications *n, u32 mask)
141{
142 n->display_switch = mask & ATIF_DISPLAY_SWITCH_REQUEST_SUPPORTED;
143 n->expansion_mode_change = mask & ATIF_EXPANSION_MODE_CHANGE_REQUEST_SUPPORTED;
144 n->thermal_state = mask & ATIF_THERMAL_STATE_CHANGE_REQUEST_SUPPORTED;
145 n->forced_power_state = mask & ATIF_FORCED_POWER_STATE_CHANGE_REQUEST_SUPPORTED;
146 n->system_power_state = mask & ATIF_SYSTEM_POWER_SOURCE_CHANGE_REQUEST_SUPPORTED;
147 n->display_conf_change = mask & ATIF_DISPLAY_CONF_CHANGE_REQUEST_SUPPORTED;
148 n->px_gfx_switch = mask & ATIF_PX_GFX_SWITCH_REQUEST_SUPPORTED;
149 n->brightness_change = mask & ATIF_PANEL_BRIGHTNESS_CHANGE_REQUEST_SUPPORTED;
150 n->dgpu_display_event = mask & ATIF_DGPU_DISPLAY_EVENT_SUPPORTED;
151}
152
Alex Deucherc3c65162012-08-02 12:30:49 -0400153/**
154 * radeon_atif_parse_functions - parse supported functions
155 *
156 * @f: supported functions struct
157 * @mask: supported functions mask from ATIF
158 *
159 * Use the supported functions mask from ATIF function
160 * ATIF_FUNCTION_VERIFY_INTERFACE to determine what functions
161 * are supported (all asics).
162 */
Luca Tettamantifd64ca82012-08-16 11:11:18 -0400163static void radeon_atif_parse_functions(struct radeon_atif_functions *f, u32 mask)
164{
165 f->system_params = mask & ATIF_GET_SYSTEM_PARAMETERS_SUPPORTED;
166 f->sbios_requests = mask & ATIF_GET_SYSTEM_BIOS_REQUESTS_SUPPORTED;
167 f->select_active_disp = mask & ATIF_SELECT_ACTIVE_DISPLAYS_SUPPORTED;
168 f->lid_state = mask & ATIF_GET_LID_STATE_SUPPORTED;
169 f->get_tv_standard = mask & ATIF_GET_TV_STANDARD_FROM_CMOS_SUPPORTED;
170 f->set_tv_standard = mask & ATIF_SET_TV_STANDARD_IN_CMOS_SUPPORTED;
171 f->get_panel_expansion_mode = mask & ATIF_GET_PANEL_EXPANSION_MODE_FROM_CMOS_SUPPORTED;
172 f->set_panel_expansion_mode = mask & ATIF_SET_PANEL_EXPANSION_MODE_IN_CMOS_SUPPORTED;
173 f->temperature_change = mask & ATIF_TEMPERATURE_CHANGE_NOTIFICATION_SUPPORTED;
174 f->graphics_device_types = mask & ATIF_GET_GRAPHICS_DEVICE_TYPES_SUPPORTED;
175}
176
Alex Deucherc3c65162012-08-02 12:30:49 -0400177/**
178 * radeon_atif_verify_interface - verify ATIF
179 *
180 * @handle: acpi handle
181 * @atif: radeon atif struct
182 *
183 * Execute the ATIF_FUNCTION_VERIFY_INTERFACE ATIF function
184 * to initialize ATIF and determine what features are supported
185 * (all asics).
186 * returns 0 on success, error on failure.
187 */
Luca Tettamantifd64ca82012-08-16 11:11:18 -0400188static int radeon_atif_verify_interface(acpi_handle handle,
189 struct radeon_atif *atif)
190{
191 union acpi_object *info;
192 struct atif_verify_interface output;
193 size_t size;
194 int err = 0;
195
196 info = radeon_atif_call(handle, ATIF_FUNCTION_VERIFY_INTERFACE, NULL);
197 if (!info)
198 return -EIO;
199
200 memset(&output, 0, sizeof(output));
201
202 size = *(u16 *) info->buffer.pointer;
203 if (size < 12) {
Luca Tettamantia1871932012-10-03 15:00:19 +0200204 DRM_INFO("ATIF buffer is too small: %zu\n", size);
Luca Tettamantifd64ca82012-08-16 11:11:18 -0400205 err = -EINVAL;
206 goto out;
207 }
208 size = min(sizeof(output), size);
209
210 memcpy(&output, info->buffer.pointer, size);
211
212 /* TODO: check version? */
213 DRM_DEBUG_DRIVER("ATIF version %u\n", output.version);
214
215 radeon_atif_parse_notification(&atif->notifications, output.notification_mask);
216 radeon_atif_parse_functions(&atif->functions, output.function_bits);
217
218out:
219 kfree(info);
220 return err;
221}
222
Alex Deucherc3c65162012-08-02 12:30:49 -0400223/**
224 * radeon_atif_get_notification_params - determine notify configuration
225 *
226 * @handle: acpi handle
227 * @n: atif notification configuration struct
228 *
229 * Execute the ATIF_FUNCTION_GET_SYSTEM_PARAMETERS ATIF function
230 * to determine if a notifier is used and if so which one
231 * (all asics). This is either Notify(VGA, 0x81) or Notify(VGA, n)
232 * where n is specified in the result if a notifier is used.
233 * Returns 0 on success, error on failure.
234 */
Luca Tettamantice3cf822012-07-30 21:16:06 +0200235static int radeon_atif_get_notification_params(acpi_handle handle,
236 struct radeon_atif_notification_cfg *n)
237{
238 union acpi_object *info;
239 struct atif_system_params params;
240 size_t size;
241 int err = 0;
242
243 info = radeon_atif_call(handle, ATIF_FUNCTION_GET_SYSTEM_PARAMETERS, NULL);
244 if (!info) {
245 err = -EIO;
246 goto out;
247 }
248
249 size = *(u16 *) info->buffer.pointer;
250 if (size < 10) {
251 err = -EINVAL;
252 goto out;
253 }
254
255 memset(&params, 0, sizeof(params));
256 size = min(sizeof(params), size);
257 memcpy(&params, info->buffer.pointer, size);
258
Luca Tettamantifda4b252012-07-30 21:20:35 +0200259 DRM_DEBUG_DRIVER("SYSTEM_PARAMS: mask = %#x, flags = %#x\n",
260 params.flags, params.valid_mask);
Luca Tettamantice3cf822012-07-30 21:16:06 +0200261 params.flags = params.flags & params.valid_mask;
262
263 if ((params.flags & ATIF_NOTIFY_MASK) == ATIF_NOTIFY_NONE) {
264 n->enabled = false;
265 n->command_code = 0;
266 } else if ((params.flags & ATIF_NOTIFY_MASK) == ATIF_NOTIFY_81) {
267 n->enabled = true;
268 n->command_code = 0x81;
269 } else {
270 if (size < 11) {
271 err = -EINVAL;
272 goto out;
273 }
274 n->enabled = true;
275 n->command_code = params.command_code;
276 }
277
278out:
Luca Tettamantifda4b252012-07-30 21:20:35 +0200279 DRM_DEBUG_DRIVER("Notification %s, command code = %#x\n",
280 (n->enabled ? "enabled" : "disabled"),
281 n->command_code);
Luca Tettamantice3cf822012-07-30 21:16:06 +0200282 kfree(info);
283 return err;
284}
285
Alex Deucherc3c65162012-08-02 12:30:49 -0400286/**
287 * radeon_atif_get_sbios_requests - get requested sbios event
288 *
289 * @handle: acpi handle
290 * @req: atif sbios request struct
291 *
292 * Execute the ATIF_FUNCTION_GET_SYSTEM_BIOS_REQUESTS ATIF function
293 * to determine what requests the sbios is making to the driver
294 * (all asics).
295 * Returns 0 on success, error on failure.
296 */
Luca Tettamantifda4b252012-07-30 21:20:35 +0200297static int radeon_atif_get_sbios_requests(acpi_handle handle,
298 struct atif_sbios_requests *req)
299{
300 union acpi_object *info;
301 size_t size;
302 int count = 0;
303
304 info = radeon_atif_call(handle, ATIF_FUNCTION_GET_SYSTEM_BIOS_REQUESTS, NULL);
305 if (!info)
306 return -EIO;
307
308 size = *(u16 *)info->buffer.pointer;
309 if (size < 0xd) {
310 count = -EINVAL;
311 goto out;
312 }
313 memset(req, 0, sizeof(*req));
314
315 size = min(sizeof(*req), size);
316 memcpy(req, info->buffer.pointer, size);
317 DRM_DEBUG_DRIVER("SBIOS pending requests: %#x\n", req->pending);
318
319 count = hweight32(req->pending);
320
321out:
322 kfree(info);
323 return count;
324}
325
Alex Deucherc3c65162012-08-02 12:30:49 -0400326/**
327 * radeon_atif_handler - handle ATIF notify requests
328 *
329 * @rdev: radeon_device pointer
330 * @event: atif sbios request struct
331 *
332 * Checks the acpi event and if it matches an atif event,
333 * handles it.
334 * Returns NOTIFY code
335 */
Luca Tettamantifda4b252012-07-30 21:20:35 +0200336int radeon_atif_handler(struct radeon_device *rdev,
337 struct acpi_bus_event *event)
338{
339 struct radeon_atif *atif = &rdev->atif;
340 struct atif_sbios_requests req;
341 acpi_handle handle;
342 int count;
343
344 DRM_DEBUG_DRIVER("event, device_class = %s, type = %#x\n",
345 event->device_class, event->type);
346
347 if (strcmp(event->device_class, ACPI_VIDEO_CLASS) != 0)
348 return NOTIFY_DONE;
349
350 if (!atif->notification_cfg.enabled ||
351 event->type != atif->notification_cfg.command_code)
352 /* Not our event */
353 return NOTIFY_DONE;
354
355 /* Check pending SBIOS requests */
356 handle = DEVICE_ACPI_HANDLE(&rdev->pdev->dev);
357 count = radeon_atif_get_sbios_requests(handle, &req);
358
359 if (count <= 0)
360 return NOTIFY_DONE;
361
362 DRM_DEBUG_DRIVER("ATIF: %d pending SBIOS requests\n", count);
363
364 if (req.pending & ATIF_PANEL_BRIGHTNESS_CHANGE_REQUEST) {
Alex Deucher37e9b6a2012-08-03 11:39:43 -0400365 struct radeon_encoder *enc = atif->encoder_for_bl;
Luca Tettamantifda4b252012-07-30 21:20:35 +0200366
367 if (enc) {
Luca Tettamantifda4b252012-07-30 21:20:35 +0200368 DRM_DEBUG_DRIVER("Changing brightness to %d\n",
369 req.backlight_level);
370
Alex Deucher37e9b6a2012-08-03 11:39:43 -0400371 radeon_set_backlight_level(rdev, enc, req.backlight_level);
Luca Tettamantifda4b252012-07-30 21:20:35 +0200372
Alex Deuchercd234922012-10-04 09:10:10 -0400373#if defined(CONFIG_BACKLIGHT_CLASS_DEVICE) || defined(CONFIG_BACKLIGHT_CLASS_DEVICE_MODULE)
Alex Deucher37e9b6a2012-08-03 11:39:43 -0400374 if (rdev->is_atom_bios) {
375 struct radeon_encoder_atom_dig *dig = enc->enc_priv;
376 backlight_force_update(dig->bl_dev,
377 BACKLIGHT_UPDATE_HOTKEY);
378 } else {
379 struct radeon_encoder_lvds *dig = enc->enc_priv;
380 backlight_force_update(dig->bl_dev,
381 BACKLIGHT_UPDATE_HOTKEY);
382 }
Alex Deuchercd234922012-10-04 09:10:10 -0400383#endif
Luca Tettamantifda4b252012-07-30 21:20:35 +0200384 }
385 }
386 /* TODO: check other events */
387
Luca Tettamanti92fdf892012-08-02 11:39:38 -0400388 /* We've handled the event, stop the notifier chain. The ACPI interface
389 * overloads ACPI_VIDEO_NOTIFY_PROBE, we don't want to send that to
390 * userspace if the event was generated only to signal a SBIOS
391 * request.
392 */
393 return NOTIFY_BAD;
Luca Tettamantifda4b252012-07-30 21:20:35 +0200394}
395
Alex Deuchere3a15922012-08-16 11:13:43 -0400396/* Call the ATCS method
397 */
398/**
399 * radeon_atcs_call - call an ATCS method
400 *
401 * @handle: acpi handle
402 * @function: the ATCS function to execute
403 * @params: ATCS function params
404 *
405 * Executes the requested ATCS function (all asics).
406 * Returns a pointer to the acpi output buffer.
407 */
408static union acpi_object *radeon_atcs_call(acpi_handle handle, int function,
409 struct acpi_buffer *params)
410{
411 acpi_status status;
412 union acpi_object atcs_arg_elements[2];
413 struct acpi_object_list atcs_arg;
414 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
415
416 atcs_arg.count = 2;
417 atcs_arg.pointer = &atcs_arg_elements[0];
418
419 atcs_arg_elements[0].type = ACPI_TYPE_INTEGER;
420 atcs_arg_elements[0].integer.value = function;
421
422 if (params) {
423 atcs_arg_elements[1].type = ACPI_TYPE_BUFFER;
424 atcs_arg_elements[1].buffer.length = params->length;
425 atcs_arg_elements[1].buffer.pointer = params->pointer;
426 } else {
427 /* We need a second fake parameter */
428 atcs_arg_elements[1].type = ACPI_TYPE_INTEGER;
429 atcs_arg_elements[1].integer.value = 0;
430 }
431
432 status = acpi_evaluate_object(handle, "ATCS", &atcs_arg, &buffer);
433
434 /* Fail only if calling the method fails and ATIF is supported */
435 if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) {
436 DRM_DEBUG_DRIVER("failed to evaluate ATCS got %s\n",
437 acpi_format_exception(status));
438 kfree(buffer.pointer);
439 return NULL;
440 }
441
442 return buffer.pointer;
443}
444
445/**
446 * radeon_atcs_parse_functions - parse supported functions
447 *
448 * @f: supported functions struct
449 * @mask: supported functions mask from ATCS
450 *
451 * Use the supported functions mask from ATCS function
452 * ATCS_FUNCTION_VERIFY_INTERFACE to determine what functions
453 * are supported (all asics).
454 */
455static void radeon_atcs_parse_functions(struct radeon_atcs_functions *f, u32 mask)
456{
457 f->get_ext_state = mask & ATCS_GET_EXTERNAL_STATE_SUPPORTED;
458 f->pcie_perf_req = mask & ATCS_PCIE_PERFORMANCE_REQUEST_SUPPORTED;
459 f->pcie_dev_rdy = mask & ATCS_PCIE_DEVICE_READY_NOTIFICATION_SUPPORTED;
460 f->pcie_bus_width = mask & ATCS_SET_PCIE_BUS_WIDTH_SUPPORTED;
461}
462
463/**
464 * radeon_atcs_verify_interface - verify ATCS
465 *
466 * @handle: acpi handle
467 * @atcs: radeon atcs struct
468 *
469 * Execute the ATCS_FUNCTION_VERIFY_INTERFACE ATCS function
470 * to initialize ATCS and determine what features are supported
471 * (all asics).
472 * returns 0 on success, error on failure.
473 */
474static int radeon_atcs_verify_interface(acpi_handle handle,
475 struct radeon_atcs *atcs)
476{
477 union acpi_object *info;
478 struct atcs_verify_interface output;
479 size_t size;
480 int err = 0;
481
482 info = radeon_atcs_call(handle, ATCS_FUNCTION_VERIFY_INTERFACE, NULL);
483 if (!info)
484 return -EIO;
485
486 memset(&output, 0, sizeof(output));
487
488 size = *(u16 *) info->buffer.pointer;
489 if (size < 8) {
Luca Tettamantia1871932012-10-03 15:00:19 +0200490 DRM_INFO("ATCS buffer is too small: %zu\n", size);
Alex Deuchere3a15922012-08-16 11:13:43 -0400491 err = -EINVAL;
492 goto out;
493 }
494 size = min(sizeof(output), size);
495
496 memcpy(&output, info->buffer.pointer, size);
497
498 /* TODO: check version? */
499 DRM_DEBUG_DRIVER("ATCS version %u\n", output.version);
500
501 radeon_atcs_parse_functions(&atcs->functions, output.function_bits);
502
503out:
504 kfree(info);
505 return err;
506}
507
Alex Deucherc3c65162012-08-02 12:30:49 -0400508/**
509 * radeon_acpi_event - handle notify events
510 *
511 * @nb: notifier block
512 * @val: val
513 * @data: acpi event
514 *
515 * Calls relevant radeon functions in response to various
516 * acpi events.
517 * Returns NOTIFY code
518 */
Alex Deucherc4917072012-07-31 17:14:35 -0400519static int radeon_acpi_event(struct notifier_block *nb,
520 unsigned long val,
521 void *data)
522{
523 struct radeon_device *rdev = container_of(nb, struct radeon_device, acpi_nb);
524 struct acpi_bus_event *entry = (struct acpi_bus_event *)data;
525
526 if (strcmp(entry->device_class, ACPI_AC_CLASS) == 0) {
527 if (power_supply_is_system_supplied() > 0)
528 DRM_DEBUG_DRIVER("pm: AC\n");
529 else
530 DRM_DEBUG_DRIVER("pm: DC\n");
531
532 radeon_pm_acpi_event_handler(rdev);
533 }
534
535 /* Check for pending SBIOS requests */
536 return radeon_atif_handler(rdev, entry);
Alberto Miloned7a29522010-07-06 11:40:24 -0400537}
538
539/* Call all ACPI methods here */
Alex Deucherc3c65162012-08-02 12:30:49 -0400540/**
541 * radeon_acpi_init - init driver acpi support
542 *
543 * @rdev: radeon_device pointer
544 *
545 * Verifies the AMD ACPI interfaces and registers with the acpi
546 * notifier chain (all asics).
547 * Returns 0 on success, error on failure.
548 */
Alberto Miloned7a29522010-07-06 11:40:24 -0400549int radeon_acpi_init(struct radeon_device *rdev)
550{
551 acpi_handle handle;
Luca Tettamantice3cf822012-07-30 21:16:06 +0200552 struct radeon_atif *atif = &rdev->atif;
Alex Deuchere3a15922012-08-16 11:13:43 -0400553 struct radeon_atcs *atcs = &rdev->atcs;
Alberto Miloned7a29522010-07-06 11:40:24 -0400554 int ret;
555
Alberto Miloned7a29522010-07-06 11:40:24 -0400556 /* Get the device handle */
557 handle = DEVICE_ACPI_HANDLE(&rdev->pdev->dev);
558
Jean Delvare48cc9b22011-11-30 17:36:39 +0100559 /* No need to proceed if we're sure that ATIF is not supported */
560 if (!ASIC_IS_AVIVO(rdev) || !rdev->bios || !handle)
561 return 0;
562
Alex Deuchere3a15922012-08-16 11:13:43 -0400563 /* Call the ATCS method */
564 ret = radeon_atcs_verify_interface(handle, atcs);
565 if (ret) {
566 DRM_DEBUG_DRIVER("Call to ATCS verify_interface failed: %d\n", ret);
567 }
Alberto Miloned7a29522010-07-06 11:40:24 -0400568
Alberto Miloned7a29522010-07-06 11:40:24 -0400569 /* Call the ATIF method */
Luca Tettamantice3cf822012-07-30 21:16:06 +0200570 ret = radeon_atif_verify_interface(handle, atif);
571 if (ret) {
Alex Deuchere3a15922012-08-16 11:13:43 -0400572 DRM_DEBUG_DRIVER("Call to ATIF verify_interface failed: %d\n", ret);
Luca Tettamantice3cf822012-07-30 21:16:06 +0200573 goto out;
574 }
Alberto Miloned7a29522010-07-06 11:40:24 -0400575
Luca Tettamantifda4b252012-07-30 21:20:35 +0200576 if (atif->notifications.brightness_change) {
577 struct drm_encoder *tmp;
578 struct radeon_encoder *target = NULL;
579
580 /* Find the encoder controlling the brightness */
581 list_for_each_entry(tmp, &rdev->ddev->mode_config.encoder_list,
582 head) {
583 struct radeon_encoder *enc = to_radeon_encoder(tmp);
Luca Tettamantifda4b252012-07-30 21:20:35 +0200584
585 if ((enc->devices & (ATOM_DEVICE_LCD_SUPPORT)) &&
Alex Deucher37e9b6a2012-08-03 11:39:43 -0400586 enc->enc_priv) {
587 if (rdev->is_atom_bios) {
588 struct radeon_encoder_atom_dig *dig = enc->enc_priv;
589 if (dig->bl_dev) {
590 target = enc;
591 break;
592 }
593 } else {
594 struct radeon_encoder_lvds *dig = enc->enc_priv;
595 if (dig->bl_dev) {
596 target = enc;
597 break;
598 }
599 }
Luca Tettamantifda4b252012-07-30 21:20:35 +0200600 }
601 }
602
Alex Deucher37e9b6a2012-08-03 11:39:43 -0400603 atif->encoder_for_bl = target;
Luca Tettamantifda4b252012-07-30 21:20:35 +0200604 if (!target) {
605 /* Brightness change notification is enabled, but we
606 * didn't find a backlight controller, this should
607 * never happen.
608 */
609 DRM_ERROR("Cannot find a backlight controller\n");
610 }
611 }
612
Luca Tettamantice3cf822012-07-30 21:16:06 +0200613 if (atif->functions.sbios_requests && !atif->functions.system_params) {
614 /* XXX check this workraround, if sbios request function is
615 * present we have to see how it's configured in the system
616 * params
617 */
618 atif->functions.system_params = true;
619 }
620
621 if (atif->functions.system_params) {
622 ret = radeon_atif_get_notification_params(handle,
623 &atif->notification_cfg);
624 if (ret) {
625 DRM_DEBUG_DRIVER("Call to GET_SYSTEM_PARAMS failed: %d\n",
626 ret);
627 /* Disable notification */
628 atif->notification_cfg.enabled = false;
629 }
630 }
631
632out:
Alex Deucherc4917072012-07-31 17:14:35 -0400633 rdev->acpi_nb.notifier_call = radeon_acpi_event;
634 register_acpi_notifier(&rdev->acpi_nb);
635
Luca Tettamanti86504672012-07-29 17:04:43 +0200636 return ret;
Alberto Miloned7a29522010-07-06 11:40:24 -0400637}
638
Alex Deucherc3c65162012-08-02 12:30:49 -0400639/**
640 * radeon_acpi_fini - tear down driver acpi support
641 *
642 * @rdev: radeon_device pointer
643 *
644 * Unregisters with the acpi notifier chain (all asics).
645 */
Alex Deucherc4917072012-07-31 17:14:35 -0400646void radeon_acpi_fini(struct radeon_device *rdev)
647{
648 unregister_acpi_notifier(&rdev->acpi_nb);
649}