Commit | Line | Data |
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efd4e418 AD |
1 | /* |
2 | * Copyright 2012 Advanced Micro Devices, Inc. | |
3 | * | |
4 | * Permission is hereby granted, free of charge, to any person obtaining a | |
5 | * copy of this software and associated documentation files (the "Software"), | |
6 | * to deal in the Software without restriction, including without limitation | |
7 | * the rights to use, copy, modify, merge, publish, distribute, sublicense, | |
8 | * and/or sell copies of the Software, and to permit persons to whom the | |
9 | * Software is furnished to do so, subject to the following conditions: | |
10 | * | |
11 | * The above copyright notice and this permission notice shall be included in | |
12 | * all copies or substantial portions of the Software. | |
13 | * | |
14 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR | |
15 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | |
16 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL | |
17 | * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR | |
18 | * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, | |
19 | * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR | |
20 | * OTHER DEALINGS IN THE SOFTWARE. | |
21 | * | |
22 | */ | |
23 | ||
d7a2952f AM |
24 | #include <linux/pci.h> |
25 | #include <linux/acpi.h> | |
26 | #include <linux/slab.h> | |
c4917074 | 27 | #include <linux/power_supply.h> |
73559847 | 28 | #include <linux/pm_runtime.h> |
fda4b25c | 29 | #include <acpi/video.h> |
760285e7 DH |
30 | #include <drm/drmP.h> |
31 | #include <drm/drm_crtc_helper.h> | |
d7a2952f | 32 | #include "radeon.h" |
9e05b2f4 | 33 | #include "radeon_acpi.h" |
fda4b25c | 34 | #include "atom.h" |
d7a2952f | 35 | |
73559847 AD |
36 | #if defined(CONFIG_VGA_SWITCHEROO) |
37 | bool radeon_atpx_dgpu_req_power_for_displays(void); | |
38 | #else | |
39 | static inline bool radeon_atpx_dgpu_req_power_for_displays(void) { return false; } | |
40 | #endif | |
41 | ||
c4917074 AD |
42 | #define ACPI_AC_CLASS "ac_adapter" |
43 | ||
44 | extern void radeon_pm_acpi_event_handler(struct radeon_device *rdev); | |
45 | ||
fd64ca8a LT |
46 | struct atif_verify_interface { |
47 | u16 size; /* structure size in bytes (includes size field) */ | |
48 | u16 version; /* version */ | |
49 | u32 notification_mask; /* supported notifications mask */ | |
50 | u32 function_bits; /* supported functions bit vector */ | |
51 | } __packed; | |
52 | ||
ce3cf821 | 53 | struct atif_system_params { |
fda4b25c LT |
54 | u16 size; /* structure size in bytes (includes size field) */ |
55 | u32 valid_mask; /* valid flags mask */ | |
56 | u32 flags; /* flags */ | |
57 | u8 command_code; /* notify command code */ | |
58 | } __packed; | |
59 | ||
60 | struct atif_sbios_requests { | |
61 | u16 size; /* structure size in bytes (includes size field) */ | |
62 | u32 pending; /* pending sbios requests */ | |
63 | u8 panel_exp_mode; /* panel expansion mode */ | |
64 | u8 thermal_gfx; /* thermal state: target gfx controller */ | |
65 | u8 thermal_state; /* thermal state: state id (0: exit state, non-0: state) */ | |
66 | u8 forced_power_gfx; /* forced power state: target gfx controller */ | |
67 | u8 forced_power_state; /* forced power state: state id */ | |
68 | u8 system_power_src; /* system power source */ | |
69 | u8 backlight_level; /* panel backlight level (0-255) */ | |
ce3cf821 LT |
70 | } __packed; |
71 | ||
72 | #define ATIF_NOTIFY_MASK 0x3 | |
73 | #define ATIF_NOTIFY_NONE 0 | |
74 | #define ATIF_NOTIFY_81 1 | |
75 | #define ATIF_NOTIFY_N 2 | |
76 | ||
e3a15920 AD |
77 | struct atcs_verify_interface { |
78 | u16 size; /* structure size in bytes (includes size field) */ | |
79 | u16 version; /* version */ | |
80 | u32 function_bits; /* supported functions bit vector */ | |
81 | } __packed; | |
82 | ||
e37e6a0e | 83 | #define ATCS_VALID_FLAGS_MASK 0x3 |
dc50ba7f | 84 | |
e37e6a0e AD |
85 | struct atcs_pref_req_input { |
86 | u16 size; /* structure size in bytes (includes size field) */ | |
87 | u16 client_id; /* client id (bit 2-0: func num, 7-3: dev num, 15-8: bus num) */ | |
88 | u16 valid_flags_mask; /* valid flags mask */ | |
89 | u16 flags; /* flags */ | |
90 | u8 req_type; /* request type */ | |
91 | u8 perf_req; /* performance request */ | |
92 | } __packed; | |
dc50ba7f | 93 | |
e37e6a0e AD |
94 | struct atcs_pref_req_output { |
95 | u16 size; /* structure size in bytes (includes size field) */ | |
96 | u8 ret_val; /* return value */ | |
97 | } __packed; | |
dc50ba7f | 98 | |
d7a2952f | 99 | /* Call the ATIF method |
d7a2952f | 100 | */ |
c3c65160 AD |
101 | /** |
102 | * radeon_atif_call - call an ATIF method | |
d7a2952f | 103 | * |
c3c65160 AD |
104 | * @handle: acpi handle |
105 | * @function: the ATIF function to execute | |
106 | * @params: ATIF function params | |
107 | * | |
108 | * Executes the requested ATIF function (all asics). | |
109 | * Returns a pointer to the acpi output buffer. | |
d7a2952f | 110 | */ |
86504672 LT |
111 | static union acpi_object *radeon_atif_call(acpi_handle handle, int function, |
112 | struct acpi_buffer *params) | |
d7a2952f AM |
113 | { |
114 | acpi_status status; | |
115 | union acpi_object atif_arg_elements[2]; | |
116 | struct acpi_object_list atif_arg; | |
86504672 | 117 | struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; |
d7a2952f AM |
118 | |
119 | atif_arg.count = 2; | |
120 | atif_arg.pointer = &atif_arg_elements[0]; | |
121 | ||
122 | atif_arg_elements[0].type = ACPI_TYPE_INTEGER; | |
86504672 LT |
123 | atif_arg_elements[0].integer.value = function; |
124 | ||
125 | if (params) { | |
126 | atif_arg_elements[1].type = ACPI_TYPE_BUFFER; | |
127 | atif_arg_elements[1].buffer.length = params->length; | |
128 | atif_arg_elements[1].buffer.pointer = params->pointer; | |
129 | } else { | |
130 | /* We need a second fake parameter */ | |
131 | atif_arg_elements[1].type = ACPI_TYPE_INTEGER; | |
132 | atif_arg_elements[1].integer.value = 0; | |
133 | } | |
d7a2952f AM |
134 | |
135 | status = acpi_evaluate_object(handle, "ATIF", &atif_arg, &buffer); | |
136 | ||
137 | /* Fail only if calling the method fails and ATIF is supported */ | |
138 | if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) { | |
bc96f942 JD |
139 | DRM_DEBUG_DRIVER("failed to evaluate ATIF got %s\n", |
140 | acpi_format_exception(status)); | |
d7a2952f | 141 | kfree(buffer.pointer); |
86504672 | 142 | return NULL; |
d7a2952f AM |
143 | } |
144 | ||
86504672 | 145 | return buffer.pointer; |
d7a2952f AM |
146 | } |
147 | ||
c3c65160 AD |
148 | /** |
149 | * radeon_atif_parse_notification - parse supported notifications | |
150 | * | |
151 | * @n: supported notifications struct | |
152 | * @mask: supported notifications mask from ATIF | |
153 | * | |
154 | * Use the supported notifications mask from ATIF function | |
155 | * ATIF_FUNCTION_VERIFY_INTERFACE to determine what notifications | |
156 | * are supported (all asics). | |
157 | */ | |
fd64ca8a LT |
158 | static void radeon_atif_parse_notification(struct radeon_atif_notifications *n, u32 mask) |
159 | { | |
160 | n->display_switch = mask & ATIF_DISPLAY_SWITCH_REQUEST_SUPPORTED; | |
161 | n->expansion_mode_change = mask & ATIF_EXPANSION_MODE_CHANGE_REQUEST_SUPPORTED; | |
162 | n->thermal_state = mask & ATIF_THERMAL_STATE_CHANGE_REQUEST_SUPPORTED; | |
163 | n->forced_power_state = mask & ATIF_FORCED_POWER_STATE_CHANGE_REQUEST_SUPPORTED; | |
164 | n->system_power_state = mask & ATIF_SYSTEM_POWER_SOURCE_CHANGE_REQUEST_SUPPORTED; | |
165 | n->display_conf_change = mask & ATIF_DISPLAY_CONF_CHANGE_REQUEST_SUPPORTED; | |
166 | n->px_gfx_switch = mask & ATIF_PX_GFX_SWITCH_REQUEST_SUPPORTED; | |
167 | n->brightness_change = mask & ATIF_PANEL_BRIGHTNESS_CHANGE_REQUEST_SUPPORTED; | |
168 | n->dgpu_display_event = mask & ATIF_DGPU_DISPLAY_EVENT_SUPPORTED; | |
169 | } | |
170 | ||
c3c65160 AD |
171 | /** |
172 | * radeon_atif_parse_functions - parse supported functions | |
173 | * | |
174 | * @f: supported functions struct | |
175 | * @mask: supported functions mask from ATIF | |
176 | * | |
177 | * Use the supported functions mask from ATIF function | |
178 | * ATIF_FUNCTION_VERIFY_INTERFACE to determine what functions | |
179 | * are supported (all asics). | |
180 | */ | |
fd64ca8a LT |
181 | static void radeon_atif_parse_functions(struct radeon_atif_functions *f, u32 mask) |
182 | { | |
183 | f->system_params = mask & ATIF_GET_SYSTEM_PARAMETERS_SUPPORTED; | |
184 | f->sbios_requests = mask & ATIF_GET_SYSTEM_BIOS_REQUESTS_SUPPORTED; | |
185 | f->select_active_disp = mask & ATIF_SELECT_ACTIVE_DISPLAYS_SUPPORTED; | |
186 | f->lid_state = mask & ATIF_GET_LID_STATE_SUPPORTED; | |
187 | f->get_tv_standard = mask & ATIF_GET_TV_STANDARD_FROM_CMOS_SUPPORTED; | |
188 | f->set_tv_standard = mask & ATIF_SET_TV_STANDARD_IN_CMOS_SUPPORTED; | |
189 | f->get_panel_expansion_mode = mask & ATIF_GET_PANEL_EXPANSION_MODE_FROM_CMOS_SUPPORTED; | |
190 | f->set_panel_expansion_mode = mask & ATIF_SET_PANEL_EXPANSION_MODE_IN_CMOS_SUPPORTED; | |
191 | f->temperature_change = mask & ATIF_TEMPERATURE_CHANGE_NOTIFICATION_SUPPORTED; | |
192 | f->graphics_device_types = mask & ATIF_GET_GRAPHICS_DEVICE_TYPES_SUPPORTED; | |
193 | } | |
194 | ||
c3c65160 AD |
195 | /** |
196 | * radeon_atif_verify_interface - verify ATIF | |
197 | * | |
198 | * @handle: acpi handle | |
199 | * @atif: radeon atif struct | |
200 | * | |
201 | * Execute the ATIF_FUNCTION_VERIFY_INTERFACE ATIF function | |
202 | * to initialize ATIF and determine what features are supported | |
203 | * (all asics). | |
204 | * returns 0 on success, error on failure. | |
205 | */ | |
fd64ca8a LT |
206 | static int radeon_atif_verify_interface(acpi_handle handle, |
207 | struct radeon_atif *atif) | |
208 | { | |
209 | union acpi_object *info; | |
210 | struct atif_verify_interface output; | |
211 | size_t size; | |
212 | int err = 0; | |
213 | ||
214 | info = radeon_atif_call(handle, ATIF_FUNCTION_VERIFY_INTERFACE, NULL); | |
215 | if (!info) | |
216 | return -EIO; | |
217 | ||
218 | memset(&output, 0, sizeof(output)); | |
219 | ||
220 | size = *(u16 *) info->buffer.pointer; | |
221 | if (size < 12) { | |
a1871936 | 222 | DRM_INFO("ATIF buffer is too small: %zu\n", size); |
fd64ca8a LT |
223 | err = -EINVAL; |
224 | goto out; | |
225 | } | |
226 | size = min(sizeof(output), size); | |
227 | ||
228 | memcpy(&output, info->buffer.pointer, size); | |
229 | ||
230 | /* TODO: check version? */ | |
231 | DRM_DEBUG_DRIVER("ATIF version %u\n", output.version); | |
232 | ||
233 | radeon_atif_parse_notification(&atif->notifications, output.notification_mask); | |
234 | radeon_atif_parse_functions(&atif->functions, output.function_bits); | |
235 | ||
236 | out: | |
237 | kfree(info); | |
238 | return err; | |
239 | } | |
240 | ||
c3c65160 AD |
241 | /** |
242 | * radeon_atif_get_notification_params - determine notify configuration | |
243 | * | |
244 | * @handle: acpi handle | |
245 | * @n: atif notification configuration struct | |
246 | * | |
247 | * Execute the ATIF_FUNCTION_GET_SYSTEM_PARAMETERS ATIF function | |
248 | * to determine if a notifier is used and if so which one | |
249 | * (all asics). This is either Notify(VGA, 0x81) or Notify(VGA, n) | |
250 | * where n is specified in the result if a notifier is used. | |
251 | * Returns 0 on success, error on failure. | |
252 | */ | |
ce3cf821 LT |
253 | static int radeon_atif_get_notification_params(acpi_handle handle, |
254 | struct radeon_atif_notification_cfg *n) | |
255 | { | |
256 | union acpi_object *info; | |
257 | struct atif_system_params params; | |
258 | size_t size; | |
259 | int err = 0; | |
260 | ||
261 | info = radeon_atif_call(handle, ATIF_FUNCTION_GET_SYSTEM_PARAMETERS, NULL); | |
262 | if (!info) { | |
263 | err = -EIO; | |
264 | goto out; | |
265 | } | |
266 | ||
267 | size = *(u16 *) info->buffer.pointer; | |
268 | if (size < 10) { | |
269 | err = -EINVAL; | |
270 | goto out; | |
271 | } | |
272 | ||
273 | memset(¶ms, 0, sizeof(params)); | |
274 | size = min(sizeof(params), size); | |
275 | memcpy(¶ms, info->buffer.pointer, size); | |
276 | ||
fda4b25c LT |
277 | DRM_DEBUG_DRIVER("SYSTEM_PARAMS: mask = %#x, flags = %#x\n", |
278 | params.flags, params.valid_mask); | |
ce3cf821 LT |
279 | params.flags = params.flags & params.valid_mask; |
280 | ||
281 | if ((params.flags & ATIF_NOTIFY_MASK) == ATIF_NOTIFY_NONE) { | |
282 | n->enabled = false; | |
283 | n->command_code = 0; | |
284 | } else if ((params.flags & ATIF_NOTIFY_MASK) == ATIF_NOTIFY_81) { | |
285 | n->enabled = true; | |
286 | n->command_code = 0x81; | |
287 | } else { | |
288 | if (size < 11) { | |
289 | err = -EINVAL; | |
290 | goto out; | |
291 | } | |
292 | n->enabled = true; | |
293 | n->command_code = params.command_code; | |
294 | } | |
295 | ||
296 | out: | |
fda4b25c LT |
297 | DRM_DEBUG_DRIVER("Notification %s, command code = %#x\n", |
298 | (n->enabled ? "enabled" : "disabled"), | |
299 | n->command_code); | |
ce3cf821 LT |
300 | kfree(info); |
301 | return err; | |
302 | } | |
303 | ||
c3c65160 AD |
304 | /** |
305 | * radeon_atif_get_sbios_requests - get requested sbios event | |
306 | * | |
307 | * @handle: acpi handle | |
308 | * @req: atif sbios request struct | |
309 | * | |
310 | * Execute the ATIF_FUNCTION_GET_SYSTEM_BIOS_REQUESTS ATIF function | |
311 | * to determine what requests the sbios is making to the driver | |
312 | * (all asics). | |
313 | * Returns 0 on success, error on failure. | |
314 | */ | |
fda4b25c LT |
315 | static int radeon_atif_get_sbios_requests(acpi_handle handle, |
316 | struct atif_sbios_requests *req) | |
317 | { | |
318 | union acpi_object *info; | |
319 | size_t size; | |
320 | int count = 0; | |
321 | ||
322 | info = radeon_atif_call(handle, ATIF_FUNCTION_GET_SYSTEM_BIOS_REQUESTS, NULL); | |
323 | if (!info) | |
324 | return -EIO; | |
325 | ||
326 | size = *(u16 *)info->buffer.pointer; | |
327 | if (size < 0xd) { | |
328 | count = -EINVAL; | |
329 | goto out; | |
330 | } | |
331 | memset(req, 0, sizeof(*req)); | |
332 | ||
333 | size = min(sizeof(*req), size); | |
334 | memcpy(req, info->buffer.pointer, size); | |
335 | DRM_DEBUG_DRIVER("SBIOS pending requests: %#x\n", req->pending); | |
336 | ||
337 | count = hweight32(req->pending); | |
338 | ||
339 | out: | |
340 | kfree(info); | |
341 | return count; | |
342 | } | |
343 | ||
c3c65160 AD |
344 | /** |
345 | * radeon_atif_handler - handle ATIF notify requests | |
346 | * | |
347 | * @rdev: radeon_device pointer | |
348 | * @event: atif sbios request struct | |
349 | * | |
350 | * Checks the acpi event and if it matches an atif event, | |
351 | * handles it. | |
352 | * Returns NOTIFY code | |
353 | */ | |
fda4b25c LT |
354 | int radeon_atif_handler(struct radeon_device *rdev, |
355 | struct acpi_bus_event *event) | |
356 | { | |
357 | struct radeon_atif *atif = &rdev->atif; | |
358 | struct atif_sbios_requests req; | |
359 | acpi_handle handle; | |
360 | int count; | |
361 | ||
362 | DRM_DEBUG_DRIVER("event, device_class = %s, type = %#x\n", | |
363 | event->device_class, event->type); | |
364 | ||
365 | if (strcmp(event->device_class, ACPI_VIDEO_CLASS) != 0) | |
366 | return NOTIFY_DONE; | |
367 | ||
368 | if (!atif->notification_cfg.enabled || | |
369 | event->type != atif->notification_cfg.command_code) | |
370 | /* Not our event */ | |
371 | return NOTIFY_DONE; | |
372 | ||
373 | /* Check pending SBIOS requests */ | |
3a83f992 | 374 | handle = ACPI_HANDLE(&rdev->pdev->dev); |
fda4b25c LT |
375 | count = radeon_atif_get_sbios_requests(handle, &req); |
376 | ||
377 | if (count <= 0) | |
378 | return NOTIFY_DONE; | |
379 | ||
380 | DRM_DEBUG_DRIVER("ATIF: %d pending SBIOS requests\n", count); | |
381 | ||
382 | if (req.pending & ATIF_PANEL_BRIGHTNESS_CHANGE_REQUEST) { | |
37e9b6a6 | 383 | struct radeon_encoder *enc = atif->encoder_for_bl; |
fda4b25c LT |
384 | |
385 | if (enc) { | |
fda4b25c LT |
386 | DRM_DEBUG_DRIVER("Changing brightness to %d\n", |
387 | req.backlight_level); | |
388 | ||
37e9b6a6 | 389 | radeon_set_backlight_level(rdev, enc, req.backlight_level); |
fda4b25c | 390 | |
cd23492a | 391 | #if defined(CONFIG_BACKLIGHT_CLASS_DEVICE) || defined(CONFIG_BACKLIGHT_CLASS_DEVICE_MODULE) |
37e9b6a6 AD |
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 | } | |
cd23492a | 401 | #endif |
fda4b25c LT |
402 | } |
403 | } | |
73559847 AD |
404 | if (req.pending & ATIF_DGPU_DISPLAY_EVENT) { |
405 | if ((rdev->flags & RADEON_IS_PX) && | |
406 | radeon_atpx_dgpu_req_power_for_displays()) { | |
407 | pm_runtime_get_sync(rdev->ddev->dev); | |
408 | /* Just fire off a uevent and let userspace tell us what to do */ | |
409 | drm_helper_hpd_irq_event(rdev->ddev); | |
410 | pm_runtime_mark_last_busy(rdev->ddev->dev); | |
411 | pm_runtime_put_autosuspend(rdev->ddev->dev); | |
412 | } | |
413 | } | |
fda4b25c LT |
414 | /* TODO: check other events */ |
415 | ||
92fdf89a LT |
416 | /* We've handled the event, stop the notifier chain. The ACPI interface |
417 | * overloads ACPI_VIDEO_NOTIFY_PROBE, we don't want to send that to | |
418 | * userspace if the event was generated only to signal a SBIOS | |
419 | * request. | |
420 | */ | |
421 | return NOTIFY_BAD; | |
fda4b25c LT |
422 | } |
423 | ||
e3a15920 AD |
424 | /* Call the ATCS method |
425 | */ | |
426 | /** | |
427 | * radeon_atcs_call - call an ATCS method | |
428 | * | |
429 | * @handle: acpi handle | |
430 | * @function: the ATCS function to execute | |
431 | * @params: ATCS function params | |
432 | * | |
433 | * Executes the requested ATCS function (all asics). | |
434 | * Returns a pointer to the acpi output buffer. | |
435 | */ | |
436 | static union acpi_object *radeon_atcs_call(acpi_handle handle, int function, | |
437 | struct acpi_buffer *params) | |
438 | { | |
439 | acpi_status status; | |
440 | union acpi_object atcs_arg_elements[2]; | |
441 | struct acpi_object_list atcs_arg; | |
442 | struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; | |
443 | ||
444 | atcs_arg.count = 2; | |
445 | atcs_arg.pointer = &atcs_arg_elements[0]; | |
446 | ||
447 | atcs_arg_elements[0].type = ACPI_TYPE_INTEGER; | |
448 | atcs_arg_elements[0].integer.value = function; | |
449 | ||
450 | if (params) { | |
451 | atcs_arg_elements[1].type = ACPI_TYPE_BUFFER; | |
452 | atcs_arg_elements[1].buffer.length = params->length; | |
453 | atcs_arg_elements[1].buffer.pointer = params->pointer; | |
454 | } else { | |
455 | /* We need a second fake parameter */ | |
456 | atcs_arg_elements[1].type = ACPI_TYPE_INTEGER; | |
457 | atcs_arg_elements[1].integer.value = 0; | |
458 | } | |
459 | ||
460 | status = acpi_evaluate_object(handle, "ATCS", &atcs_arg, &buffer); | |
461 | ||
462 | /* Fail only if calling the method fails and ATIF is supported */ | |
463 | if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) { | |
464 | DRM_DEBUG_DRIVER("failed to evaluate ATCS got %s\n", | |
465 | acpi_format_exception(status)); | |
466 | kfree(buffer.pointer); | |
467 | return NULL; | |
468 | } | |
469 | ||
470 | return buffer.pointer; | |
471 | } | |
472 | ||
473 | /** | |
474 | * radeon_atcs_parse_functions - parse supported functions | |
475 | * | |
476 | * @f: supported functions struct | |
477 | * @mask: supported functions mask from ATCS | |
478 | * | |
479 | * Use the supported functions mask from ATCS function | |
480 | * ATCS_FUNCTION_VERIFY_INTERFACE to determine what functions | |
481 | * are supported (all asics). | |
482 | */ | |
483 | static void radeon_atcs_parse_functions(struct radeon_atcs_functions *f, u32 mask) | |
484 | { | |
485 | f->get_ext_state = mask & ATCS_GET_EXTERNAL_STATE_SUPPORTED; | |
486 | f->pcie_perf_req = mask & ATCS_PCIE_PERFORMANCE_REQUEST_SUPPORTED; | |
487 | f->pcie_dev_rdy = mask & ATCS_PCIE_DEVICE_READY_NOTIFICATION_SUPPORTED; | |
488 | f->pcie_bus_width = mask & ATCS_SET_PCIE_BUS_WIDTH_SUPPORTED; | |
489 | } | |
490 | ||
491 | /** | |
492 | * radeon_atcs_verify_interface - verify ATCS | |
493 | * | |
494 | * @handle: acpi handle | |
495 | * @atcs: radeon atcs struct | |
496 | * | |
497 | * Execute the ATCS_FUNCTION_VERIFY_INTERFACE ATCS function | |
498 | * to initialize ATCS and determine what features are supported | |
499 | * (all asics). | |
500 | * returns 0 on success, error on failure. | |
501 | */ | |
502 | static int radeon_atcs_verify_interface(acpi_handle handle, | |
503 | struct radeon_atcs *atcs) | |
504 | { | |
505 | union acpi_object *info; | |
506 | struct atcs_verify_interface output; | |
507 | size_t size; | |
508 | int err = 0; | |
509 | ||
510 | info = radeon_atcs_call(handle, ATCS_FUNCTION_VERIFY_INTERFACE, NULL); | |
511 | if (!info) | |
512 | return -EIO; | |
513 | ||
514 | memset(&output, 0, sizeof(output)); | |
515 | ||
516 | size = *(u16 *) info->buffer.pointer; | |
517 | if (size < 8) { | |
a1871936 | 518 | DRM_INFO("ATCS buffer is too small: %zu\n", size); |
e3a15920 AD |
519 | err = -EINVAL; |
520 | goto out; | |
521 | } | |
522 | size = min(sizeof(output), size); | |
523 | ||
524 | memcpy(&output, info->buffer.pointer, size); | |
525 | ||
526 | /* TODO: check version? */ | |
527 | DRM_DEBUG_DRIVER("ATCS version %u\n", output.version); | |
528 | ||
529 | radeon_atcs_parse_functions(&atcs->functions, output.function_bits); | |
530 | ||
531 | out: | |
532 | kfree(info); | |
533 | return err; | |
534 | } | |
535 | ||
e37e6a0e AD |
536 | /** |
537 | * radeon_acpi_is_pcie_performance_request_supported | |
538 | * | |
539 | * @rdev: radeon_device pointer | |
540 | * | |
541 | * Check if the ATCS pcie_perf_req and pcie_dev_rdy methods | |
542 | * are supported (all asics). | |
543 | * returns true if supported, false if not. | |
544 | */ | |
545 | bool radeon_acpi_is_pcie_performance_request_supported(struct radeon_device *rdev) | |
546 | { | |
547 | struct radeon_atcs *atcs = &rdev->atcs; | |
548 | ||
549 | if (atcs->functions.pcie_perf_req && atcs->functions.pcie_dev_rdy) | |
550 | return true; | |
551 | ||
552 | return false; | |
553 | } | |
554 | ||
555 | /** | |
556 | * radeon_acpi_pcie_notify_device_ready | |
557 | * | |
558 | * @rdev: radeon_device pointer | |
559 | * | |
560 | * Executes the PCIE_DEVICE_READY_NOTIFICATION method | |
561 | * (all asics). | |
562 | * returns 0 on success, error on failure. | |
563 | */ | |
564 | int radeon_acpi_pcie_notify_device_ready(struct radeon_device *rdev) | |
565 | { | |
566 | acpi_handle handle; | |
567 | union acpi_object *info; | |
568 | struct radeon_atcs *atcs = &rdev->atcs; | |
569 | ||
570 | /* Get the device handle */ | |
3a83f992 | 571 | handle = ACPI_HANDLE(&rdev->pdev->dev); |
e37e6a0e AD |
572 | if (!handle) |
573 | return -EINVAL; | |
574 | ||
575 | if (!atcs->functions.pcie_dev_rdy) | |
576 | return -EINVAL; | |
577 | ||
578 | info = radeon_atcs_call(handle, ATCS_FUNCTION_PCIE_DEVICE_READY_NOTIFICATION, NULL); | |
579 | if (!info) | |
580 | return -EIO; | |
581 | ||
582 | kfree(info); | |
583 | ||
584 | return 0; | |
585 | } | |
586 | ||
587 | /** | |
588 | * radeon_acpi_pcie_performance_request | |
589 | * | |
590 | * @rdev: radeon_device pointer | |
591 | * @perf_req: requested perf level (pcie gen speed) | |
592 | * @advertise: set advertise caps flag if set | |
593 | * | |
594 | * Executes the PCIE_PERFORMANCE_REQUEST method to | |
595 | * change the pcie gen speed (all asics). | |
596 | * returns 0 on success, error on failure. | |
597 | */ | |
598 | int radeon_acpi_pcie_performance_request(struct radeon_device *rdev, | |
599 | u8 perf_req, bool advertise) | |
600 | { | |
601 | acpi_handle handle; | |
602 | union acpi_object *info; | |
603 | struct radeon_atcs *atcs = &rdev->atcs; | |
604 | struct atcs_pref_req_input atcs_input; | |
605 | struct atcs_pref_req_output atcs_output; | |
606 | struct acpi_buffer params; | |
607 | size_t size; | |
608 | u32 retry = 3; | |
609 | ||
610 | /* Get the device handle */ | |
3a83f992 | 611 | handle = ACPI_HANDLE(&rdev->pdev->dev); |
e37e6a0e AD |
612 | if (!handle) |
613 | return -EINVAL; | |
614 | ||
615 | if (!atcs->functions.pcie_perf_req) | |
616 | return -EINVAL; | |
617 | ||
618 | atcs_input.size = sizeof(struct atcs_pref_req_input); | |
619 | /* client id (bit 2-0: func num, 7-3: dev num, 15-8: bus num) */ | |
620 | atcs_input.client_id = rdev->pdev->devfn | (rdev->pdev->bus->number << 8); | |
621 | atcs_input.valid_flags_mask = ATCS_VALID_FLAGS_MASK; | |
622 | atcs_input.flags = ATCS_WAIT_FOR_COMPLETION; | |
623 | if (advertise) | |
624 | atcs_input.flags |= ATCS_ADVERTISE_CAPS; | |
625 | atcs_input.req_type = ATCS_PCIE_LINK_SPEED; | |
626 | atcs_input.perf_req = perf_req; | |
627 | ||
628 | params.length = sizeof(struct atcs_pref_req_input); | |
629 | params.pointer = &atcs_input; | |
630 | ||
631 | while (retry--) { | |
632 | info = radeon_atcs_call(handle, ATCS_FUNCTION_PCIE_PERFORMANCE_REQUEST, ¶ms); | |
633 | if (!info) | |
634 | return -EIO; | |
635 | ||
636 | memset(&atcs_output, 0, sizeof(atcs_output)); | |
637 | ||
638 | size = *(u16 *) info->buffer.pointer; | |
639 | if (size < 3) { | |
640 | DRM_INFO("ATCS buffer is too small: %zu\n", size); | |
641 | kfree(info); | |
642 | return -EINVAL; | |
643 | } | |
644 | size = min(sizeof(atcs_output), size); | |
645 | ||
646 | memcpy(&atcs_output, info->buffer.pointer, size); | |
647 | ||
648 | kfree(info); | |
649 | ||
650 | switch (atcs_output.ret_val) { | |
651 | case ATCS_REQUEST_REFUSED: | |
652 | default: | |
653 | return -EINVAL; | |
654 | case ATCS_REQUEST_COMPLETE: | |
655 | return 0; | |
656 | case ATCS_REQUEST_IN_PROGRESS: | |
657 | udelay(10); | |
658 | break; | |
659 | } | |
660 | } | |
661 | ||
662 | return 0; | |
663 | } | |
664 | ||
c3c65160 AD |
665 | /** |
666 | * radeon_acpi_event - handle notify events | |
667 | * | |
668 | * @nb: notifier block | |
669 | * @val: val | |
670 | * @data: acpi event | |
671 | * | |
672 | * Calls relevant radeon functions in response to various | |
673 | * acpi events. | |
674 | * Returns NOTIFY code | |
675 | */ | |
c4917074 AD |
676 | static int radeon_acpi_event(struct notifier_block *nb, |
677 | unsigned long val, | |
678 | void *data) | |
679 | { | |
680 | struct radeon_device *rdev = container_of(nb, struct radeon_device, acpi_nb); | |
681 | struct acpi_bus_event *entry = (struct acpi_bus_event *)data; | |
682 | ||
683 | if (strcmp(entry->device_class, ACPI_AC_CLASS) == 0) { | |
684 | if (power_supply_is_system_supplied() > 0) | |
685 | DRM_DEBUG_DRIVER("pm: AC\n"); | |
686 | else | |
687 | DRM_DEBUG_DRIVER("pm: DC\n"); | |
688 | ||
689 | radeon_pm_acpi_event_handler(rdev); | |
690 | } | |
691 | ||
692 | /* Check for pending SBIOS requests */ | |
693 | return radeon_atif_handler(rdev, entry); | |
d7a2952f AM |
694 | } |
695 | ||
696 | /* Call all ACPI methods here */ | |
c3c65160 AD |
697 | /** |
698 | * radeon_acpi_init - init driver acpi support | |
699 | * | |
700 | * @rdev: radeon_device pointer | |
701 | * | |
702 | * Verifies the AMD ACPI interfaces and registers with the acpi | |
703 | * notifier chain (all asics). | |
704 | * Returns 0 on success, error on failure. | |
705 | */ | |
d7a2952f AM |
706 | int radeon_acpi_init(struct radeon_device *rdev) |
707 | { | |
708 | acpi_handle handle; | |
ce3cf821 | 709 | struct radeon_atif *atif = &rdev->atif; |
e3a15920 | 710 | struct radeon_atcs *atcs = &rdev->atcs; |
d7a2952f AM |
711 | int ret; |
712 | ||
d7a2952f | 713 | /* Get the device handle */ |
3a83f992 | 714 | handle = ACPI_HANDLE(&rdev->pdev->dev); |
d7a2952f | 715 | |
48cc9b2c JD |
716 | /* No need to proceed if we're sure that ATIF is not supported */ |
717 | if (!ASIC_IS_AVIVO(rdev) || !rdev->bios || !handle) | |
718 | return 0; | |
719 | ||
e3a15920 AD |
720 | /* Call the ATCS method */ |
721 | ret = radeon_atcs_verify_interface(handle, atcs); | |
722 | if (ret) { | |
723 | DRM_DEBUG_DRIVER("Call to ATCS verify_interface failed: %d\n", ret); | |
724 | } | |
725 | ||
d7a2952f | 726 | /* Call the ATIF method */ |
ce3cf821 LT |
727 | ret = radeon_atif_verify_interface(handle, atif); |
728 | if (ret) { | |
e3a15920 | 729 | DRM_DEBUG_DRIVER("Call to ATIF verify_interface failed: %d\n", ret); |
ce3cf821 LT |
730 | goto out; |
731 | } | |
732 | ||
fda4b25c LT |
733 | if (atif->notifications.brightness_change) { |
734 | struct drm_encoder *tmp; | |
735 | struct radeon_encoder *target = NULL; | |
736 | ||
737 | /* Find the encoder controlling the brightness */ | |
738 | list_for_each_entry(tmp, &rdev->ddev->mode_config.encoder_list, | |
739 | head) { | |
740 | struct radeon_encoder *enc = to_radeon_encoder(tmp); | |
fda4b25c LT |
741 | |
742 | if ((enc->devices & (ATOM_DEVICE_LCD_SUPPORT)) && | |
37e9b6a6 AD |
743 | enc->enc_priv) { |
744 | if (rdev->is_atom_bios) { | |
745 | struct radeon_encoder_atom_dig *dig = enc->enc_priv; | |
746 | if (dig->bl_dev) { | |
747 | target = enc; | |
748 | break; | |
749 | } | |
750 | } else { | |
751 | struct radeon_encoder_lvds *dig = enc->enc_priv; | |
752 | if (dig->bl_dev) { | |
753 | target = enc; | |
754 | break; | |
755 | } | |
756 | } | |
fda4b25c LT |
757 | } |
758 | } | |
759 | ||
37e9b6a6 | 760 | atif->encoder_for_bl = target; |
fda4b25c | 761 | } |
d7a2952f | 762 | |
ce3cf821 LT |
763 | if (atif->functions.sbios_requests && !atif->functions.system_params) { |
764 | /* XXX check this workraround, if sbios request function is | |
765 | * present we have to see how it's configured in the system | |
766 | * params | |
767 | */ | |
768 | atif->functions.system_params = true; | |
769 | } | |
770 | ||
771 | if (atif->functions.system_params) { | |
772 | ret = radeon_atif_get_notification_params(handle, | |
773 | &atif->notification_cfg); | |
774 | if (ret) { | |
775 | DRM_DEBUG_DRIVER("Call to GET_SYSTEM_PARAMS failed: %d\n", | |
776 | ret); | |
777 | /* Disable notification */ | |
778 | atif->notification_cfg.enabled = false; | |
779 | } | |
780 | } | |
d7a2952f | 781 | |
ce3cf821 | 782 | out: |
c4917074 AD |
783 | rdev->acpi_nb.notifier_call = radeon_acpi_event; |
784 | register_acpi_notifier(&rdev->acpi_nb); | |
785 | ||
86504672 | 786 | return ret; |
d7a2952f AM |
787 | } |
788 | ||
c3c65160 AD |
789 | /** |
790 | * radeon_acpi_fini - tear down driver acpi support | |
791 | * | |
792 | * @rdev: radeon_device pointer | |
793 | * | |
794 | * Unregisters with the acpi notifier chain (all asics). | |
795 | */ | |
c4917074 AD |
796 | void radeon_acpi_fini(struct radeon_device *rdev) |
797 | { | |
798 | unregister_acpi_notifier(&rdev->acpi_nb); | |
799 | } |