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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> | |
fcd70cd3 | 32 | #include <drm/drm_probe_helper.h> |
d7a2952f | 33 | #include "radeon.h" |
9e05b2f4 | 34 | #include "radeon_acpi.h" |
fda4b25c | 35 | #include "atom.h" |
d7a2952f | 36 | |
73559847 AD |
37 | #if defined(CONFIG_VGA_SWITCHEROO) |
38 | bool radeon_atpx_dgpu_req_power_for_displays(void); | |
39 | #else | |
40 | static inline bool radeon_atpx_dgpu_req_power_for_displays(void) { return false; } | |
41 | #endif | |
42 | ||
c4917074 AD |
43 | #define ACPI_AC_CLASS "ac_adapter" |
44 | ||
45 | extern void radeon_pm_acpi_event_handler(struct radeon_device *rdev); | |
46 | ||
fd64ca8a LT |
47 | struct atif_verify_interface { |
48 | u16 size; /* structure size in bytes (includes size field) */ | |
49 | u16 version; /* version */ | |
50 | u32 notification_mask; /* supported notifications mask */ | |
51 | u32 function_bits; /* supported functions bit vector */ | |
52 | } __packed; | |
53 | ||
ce3cf821 | 54 | struct atif_system_params { |
fda4b25c LT |
55 | u16 size; /* structure size in bytes (includes size field) */ |
56 | u32 valid_mask; /* valid flags mask */ | |
57 | u32 flags; /* flags */ | |
58 | u8 command_code; /* notify command code */ | |
59 | } __packed; | |
60 | ||
61 | struct atif_sbios_requests { | |
62 | u16 size; /* structure size in bytes (includes size field) */ | |
63 | u32 pending; /* pending sbios requests */ | |
64 | u8 panel_exp_mode; /* panel expansion mode */ | |
65 | u8 thermal_gfx; /* thermal state: target gfx controller */ | |
66 | u8 thermal_state; /* thermal state: state id (0: exit state, non-0: state) */ | |
67 | u8 forced_power_gfx; /* forced power state: target gfx controller */ | |
68 | u8 forced_power_state; /* forced power state: state id */ | |
69 | u8 system_power_src; /* system power source */ | |
70 | u8 backlight_level; /* panel backlight level (0-255) */ | |
ce3cf821 LT |
71 | } __packed; |
72 | ||
73 | #define ATIF_NOTIFY_MASK 0x3 | |
74 | #define ATIF_NOTIFY_NONE 0 | |
75 | #define ATIF_NOTIFY_81 1 | |
76 | #define ATIF_NOTIFY_N 2 | |
77 | ||
e3a15920 AD |
78 | struct atcs_verify_interface { |
79 | u16 size; /* structure size in bytes (includes size field) */ | |
80 | u16 version; /* version */ | |
81 | u32 function_bits; /* supported functions bit vector */ | |
82 | } __packed; | |
83 | ||
e37e6a0e | 84 | #define ATCS_VALID_FLAGS_MASK 0x3 |
dc50ba7f | 85 | |
e37e6a0e AD |
86 | struct atcs_pref_req_input { |
87 | u16 size; /* structure size in bytes (includes size field) */ | |
88 | u16 client_id; /* client id (bit 2-0: func num, 7-3: dev num, 15-8: bus num) */ | |
89 | u16 valid_flags_mask; /* valid flags mask */ | |
90 | u16 flags; /* flags */ | |
91 | u8 req_type; /* request type */ | |
92 | u8 perf_req; /* performance request */ | |
93 | } __packed; | |
dc50ba7f | 94 | |
e37e6a0e AD |
95 | struct atcs_pref_req_output { |
96 | u16 size; /* structure size in bytes (includes size field) */ | |
97 | u8 ret_val; /* return value */ | |
98 | } __packed; | |
dc50ba7f | 99 | |
d7a2952f | 100 | /* Call the ATIF method |
d7a2952f | 101 | */ |
c3c65160 AD |
102 | /** |
103 | * radeon_atif_call - call an ATIF method | |
d7a2952f | 104 | * |
c3c65160 AD |
105 | * @handle: acpi handle |
106 | * @function: the ATIF function to execute | |
107 | * @params: ATIF function params | |
108 | * | |
109 | * Executes the requested ATIF function (all asics). | |
110 | * Returns a pointer to the acpi output buffer. | |
d7a2952f | 111 | */ |
86504672 LT |
112 | static union acpi_object *radeon_atif_call(acpi_handle handle, int function, |
113 | struct acpi_buffer *params) | |
d7a2952f AM |
114 | { |
115 | acpi_status status; | |
116 | union acpi_object atif_arg_elements[2]; | |
117 | struct acpi_object_list atif_arg; | |
86504672 | 118 | struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; |
d7a2952f AM |
119 | |
120 | atif_arg.count = 2; | |
121 | atif_arg.pointer = &atif_arg_elements[0]; | |
122 | ||
123 | atif_arg_elements[0].type = ACPI_TYPE_INTEGER; | |
86504672 LT |
124 | atif_arg_elements[0].integer.value = function; |
125 | ||
126 | if (params) { | |
127 | atif_arg_elements[1].type = ACPI_TYPE_BUFFER; | |
128 | atif_arg_elements[1].buffer.length = params->length; | |
129 | atif_arg_elements[1].buffer.pointer = params->pointer; | |
130 | } else { | |
131 | /* We need a second fake parameter */ | |
132 | atif_arg_elements[1].type = ACPI_TYPE_INTEGER; | |
133 | atif_arg_elements[1].integer.value = 0; | |
134 | } | |
d7a2952f AM |
135 | |
136 | status = acpi_evaluate_object(handle, "ATIF", &atif_arg, &buffer); | |
137 | ||
138 | /* Fail only if calling the method fails and ATIF is supported */ | |
139 | if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) { | |
bc96f942 JD |
140 | DRM_DEBUG_DRIVER("failed to evaluate ATIF got %s\n", |
141 | acpi_format_exception(status)); | |
d7a2952f | 142 | kfree(buffer.pointer); |
86504672 | 143 | return NULL; |
d7a2952f AM |
144 | } |
145 | ||
86504672 | 146 | return buffer.pointer; |
d7a2952f AM |
147 | } |
148 | ||
c3c65160 AD |
149 | /** |
150 | * radeon_atif_parse_notification - parse supported notifications | |
151 | * | |
152 | * @n: supported notifications struct | |
153 | * @mask: supported notifications mask from ATIF | |
154 | * | |
155 | * Use the supported notifications mask from ATIF function | |
156 | * ATIF_FUNCTION_VERIFY_INTERFACE to determine what notifications | |
157 | * are supported (all asics). | |
158 | */ | |
fd64ca8a LT |
159 | static void radeon_atif_parse_notification(struct radeon_atif_notifications *n, u32 mask) |
160 | { | |
161 | n->display_switch = mask & ATIF_DISPLAY_SWITCH_REQUEST_SUPPORTED; | |
162 | n->expansion_mode_change = mask & ATIF_EXPANSION_MODE_CHANGE_REQUEST_SUPPORTED; | |
163 | n->thermal_state = mask & ATIF_THERMAL_STATE_CHANGE_REQUEST_SUPPORTED; | |
164 | n->forced_power_state = mask & ATIF_FORCED_POWER_STATE_CHANGE_REQUEST_SUPPORTED; | |
165 | n->system_power_state = mask & ATIF_SYSTEM_POWER_SOURCE_CHANGE_REQUEST_SUPPORTED; | |
166 | n->display_conf_change = mask & ATIF_DISPLAY_CONF_CHANGE_REQUEST_SUPPORTED; | |
167 | n->px_gfx_switch = mask & ATIF_PX_GFX_SWITCH_REQUEST_SUPPORTED; | |
168 | n->brightness_change = mask & ATIF_PANEL_BRIGHTNESS_CHANGE_REQUEST_SUPPORTED; | |
169 | n->dgpu_display_event = mask & ATIF_DGPU_DISPLAY_EVENT_SUPPORTED; | |
170 | } | |
171 | ||
c3c65160 AD |
172 | /** |
173 | * radeon_atif_parse_functions - parse supported functions | |
174 | * | |
175 | * @f: supported functions struct | |
176 | * @mask: supported functions mask from ATIF | |
177 | * | |
178 | * Use the supported functions mask from ATIF function | |
179 | * ATIF_FUNCTION_VERIFY_INTERFACE to determine what functions | |
180 | * are supported (all asics). | |
181 | */ | |
fd64ca8a LT |
182 | static void radeon_atif_parse_functions(struct radeon_atif_functions *f, u32 mask) |
183 | { | |
184 | f->system_params = mask & ATIF_GET_SYSTEM_PARAMETERS_SUPPORTED; | |
185 | f->sbios_requests = mask & ATIF_GET_SYSTEM_BIOS_REQUESTS_SUPPORTED; | |
186 | f->select_active_disp = mask & ATIF_SELECT_ACTIVE_DISPLAYS_SUPPORTED; | |
187 | f->lid_state = mask & ATIF_GET_LID_STATE_SUPPORTED; | |
188 | f->get_tv_standard = mask & ATIF_GET_TV_STANDARD_FROM_CMOS_SUPPORTED; | |
189 | f->set_tv_standard = mask & ATIF_SET_TV_STANDARD_IN_CMOS_SUPPORTED; | |
190 | f->get_panel_expansion_mode = mask & ATIF_GET_PANEL_EXPANSION_MODE_FROM_CMOS_SUPPORTED; | |
191 | f->set_panel_expansion_mode = mask & ATIF_SET_PANEL_EXPANSION_MODE_IN_CMOS_SUPPORTED; | |
192 | f->temperature_change = mask & ATIF_TEMPERATURE_CHANGE_NOTIFICATION_SUPPORTED; | |
193 | f->graphics_device_types = mask & ATIF_GET_GRAPHICS_DEVICE_TYPES_SUPPORTED; | |
194 | } | |
195 | ||
c3c65160 AD |
196 | /** |
197 | * radeon_atif_verify_interface - verify ATIF | |
198 | * | |
199 | * @handle: acpi handle | |
200 | * @atif: radeon atif struct | |
201 | * | |
202 | * Execute the ATIF_FUNCTION_VERIFY_INTERFACE ATIF function | |
203 | * to initialize ATIF and determine what features are supported | |
204 | * (all asics). | |
205 | * returns 0 on success, error on failure. | |
206 | */ | |
fd64ca8a LT |
207 | static int radeon_atif_verify_interface(acpi_handle handle, |
208 | struct radeon_atif *atif) | |
209 | { | |
210 | union acpi_object *info; | |
211 | struct atif_verify_interface output; | |
212 | size_t size; | |
213 | int err = 0; | |
214 | ||
215 | info = radeon_atif_call(handle, ATIF_FUNCTION_VERIFY_INTERFACE, NULL); | |
216 | if (!info) | |
217 | return -EIO; | |
218 | ||
219 | memset(&output, 0, sizeof(output)); | |
220 | ||
221 | size = *(u16 *) info->buffer.pointer; | |
222 | if (size < 12) { | |
a1871936 | 223 | DRM_INFO("ATIF buffer is too small: %zu\n", size); |
fd64ca8a LT |
224 | err = -EINVAL; |
225 | goto out; | |
226 | } | |
227 | size = min(sizeof(output), size); | |
228 | ||
229 | memcpy(&output, info->buffer.pointer, size); | |
230 | ||
231 | /* TODO: check version? */ | |
232 | DRM_DEBUG_DRIVER("ATIF version %u\n", output.version); | |
233 | ||
234 | radeon_atif_parse_notification(&atif->notifications, output.notification_mask); | |
235 | radeon_atif_parse_functions(&atif->functions, output.function_bits); | |
236 | ||
237 | out: | |
238 | kfree(info); | |
239 | return err; | |
240 | } | |
241 | ||
c3c65160 AD |
242 | /** |
243 | * radeon_atif_get_notification_params - determine notify configuration | |
244 | * | |
245 | * @handle: acpi handle | |
246 | * @n: atif notification configuration struct | |
247 | * | |
248 | * Execute the ATIF_FUNCTION_GET_SYSTEM_PARAMETERS ATIF function | |
249 | * to determine if a notifier is used and if so which one | |
250 | * (all asics). This is either Notify(VGA, 0x81) or Notify(VGA, n) | |
251 | * where n is specified in the result if a notifier is used. | |
252 | * Returns 0 on success, error on failure. | |
253 | */ | |
ce3cf821 LT |
254 | static int radeon_atif_get_notification_params(acpi_handle handle, |
255 | struct radeon_atif_notification_cfg *n) | |
256 | { | |
257 | union acpi_object *info; | |
258 | struct atif_system_params params; | |
259 | size_t size; | |
260 | int err = 0; | |
261 | ||
262 | info = radeon_atif_call(handle, ATIF_FUNCTION_GET_SYSTEM_PARAMETERS, NULL); | |
263 | if (!info) { | |
264 | err = -EIO; | |
265 | goto out; | |
266 | } | |
267 | ||
268 | size = *(u16 *) info->buffer.pointer; | |
269 | if (size < 10) { | |
270 | err = -EINVAL; | |
271 | goto out; | |
272 | } | |
273 | ||
274 | memset(¶ms, 0, sizeof(params)); | |
275 | size = min(sizeof(params), size); | |
276 | memcpy(¶ms, info->buffer.pointer, size); | |
277 | ||
fda4b25c LT |
278 | DRM_DEBUG_DRIVER("SYSTEM_PARAMS: mask = %#x, flags = %#x\n", |
279 | params.flags, params.valid_mask); | |
ce3cf821 LT |
280 | params.flags = params.flags & params.valid_mask; |
281 | ||
282 | if ((params.flags & ATIF_NOTIFY_MASK) == ATIF_NOTIFY_NONE) { | |
283 | n->enabled = false; | |
284 | n->command_code = 0; | |
285 | } else if ((params.flags & ATIF_NOTIFY_MASK) == ATIF_NOTIFY_81) { | |
286 | n->enabled = true; | |
287 | n->command_code = 0x81; | |
288 | } else { | |
289 | if (size < 11) { | |
290 | err = -EINVAL; | |
291 | goto out; | |
292 | } | |
293 | n->enabled = true; | |
294 | n->command_code = params.command_code; | |
295 | } | |
296 | ||
297 | out: | |
fda4b25c LT |
298 | DRM_DEBUG_DRIVER("Notification %s, command code = %#x\n", |
299 | (n->enabled ? "enabled" : "disabled"), | |
300 | n->command_code); | |
ce3cf821 LT |
301 | kfree(info); |
302 | return err; | |
303 | } | |
304 | ||
c3c65160 AD |
305 | /** |
306 | * radeon_atif_get_sbios_requests - get requested sbios event | |
307 | * | |
308 | * @handle: acpi handle | |
309 | * @req: atif sbios request struct | |
310 | * | |
311 | * Execute the ATIF_FUNCTION_GET_SYSTEM_BIOS_REQUESTS ATIF function | |
312 | * to determine what requests the sbios is making to the driver | |
313 | * (all asics). | |
314 | * Returns 0 on success, error on failure. | |
315 | */ | |
fda4b25c LT |
316 | static int radeon_atif_get_sbios_requests(acpi_handle handle, |
317 | struct atif_sbios_requests *req) | |
318 | { | |
319 | union acpi_object *info; | |
320 | size_t size; | |
321 | int count = 0; | |
322 | ||
323 | info = radeon_atif_call(handle, ATIF_FUNCTION_GET_SYSTEM_BIOS_REQUESTS, NULL); | |
324 | if (!info) | |
325 | return -EIO; | |
326 | ||
327 | size = *(u16 *)info->buffer.pointer; | |
328 | if (size < 0xd) { | |
329 | count = -EINVAL; | |
330 | goto out; | |
331 | } | |
332 | memset(req, 0, sizeof(*req)); | |
333 | ||
334 | size = min(sizeof(*req), size); | |
335 | memcpy(req, info->buffer.pointer, size); | |
336 | DRM_DEBUG_DRIVER("SBIOS pending requests: %#x\n", req->pending); | |
337 | ||
338 | count = hweight32(req->pending); | |
339 | ||
340 | out: | |
341 | kfree(info); | |
342 | return count; | |
343 | } | |
344 | ||
c3c65160 AD |
345 | /** |
346 | * radeon_atif_handler - handle ATIF notify requests | |
347 | * | |
348 | * @rdev: radeon_device pointer | |
349 | * @event: atif sbios request struct | |
350 | * | |
351 | * Checks the acpi event and if it matches an atif event, | |
352 | * handles it. | |
353 | * Returns NOTIFY code | |
354 | */ | |
afe2068d | 355 | static int radeon_atif_handler(struct radeon_device *rdev, |
fda4b25c LT |
356 | struct acpi_bus_event *event) |
357 | { | |
358 | struct radeon_atif *atif = &rdev->atif; | |
359 | struct atif_sbios_requests req; | |
360 | acpi_handle handle; | |
361 | int count; | |
362 | ||
363 | DRM_DEBUG_DRIVER("event, device_class = %s, type = %#x\n", | |
364 | event->device_class, event->type); | |
365 | ||
366 | if (strcmp(event->device_class, ACPI_VIDEO_CLASS) != 0) | |
367 | return NOTIFY_DONE; | |
368 | ||
369 | if (!atif->notification_cfg.enabled || | |
370 | event->type != atif->notification_cfg.command_code) | |
371 | /* Not our event */ | |
372 | return NOTIFY_DONE; | |
373 | ||
374 | /* Check pending SBIOS requests */ | |
3a83f992 | 375 | handle = ACPI_HANDLE(&rdev->pdev->dev); |
fda4b25c LT |
376 | count = radeon_atif_get_sbios_requests(handle, &req); |
377 | ||
378 | if (count <= 0) | |
379 | return NOTIFY_DONE; | |
380 | ||
381 | DRM_DEBUG_DRIVER("ATIF: %d pending SBIOS requests\n", count); | |
382 | ||
383 | if (req.pending & ATIF_PANEL_BRIGHTNESS_CHANGE_REQUEST) { | |
37e9b6a6 | 384 | struct radeon_encoder *enc = atif->encoder_for_bl; |
fda4b25c LT |
385 | |
386 | if (enc) { | |
fda4b25c LT |
387 | DRM_DEBUG_DRIVER("Changing brightness to %d\n", |
388 | req.backlight_level); | |
389 | ||
37e9b6a6 | 390 | radeon_set_backlight_level(rdev, enc, req.backlight_level); |
fda4b25c | 391 | |
cd23492a | 392 | #if defined(CONFIG_BACKLIGHT_CLASS_DEVICE) || defined(CONFIG_BACKLIGHT_CLASS_DEVICE_MODULE) |
37e9b6a6 AD |
393 | if (rdev->is_atom_bios) { |
394 | struct radeon_encoder_atom_dig *dig = enc->enc_priv; | |
395 | backlight_force_update(dig->bl_dev, | |
396 | BACKLIGHT_UPDATE_HOTKEY); | |
397 | } else { | |
398 | struct radeon_encoder_lvds *dig = enc->enc_priv; | |
399 | backlight_force_update(dig->bl_dev, | |
400 | BACKLIGHT_UPDATE_HOTKEY); | |
401 | } | |
cd23492a | 402 | #endif |
fda4b25c LT |
403 | } |
404 | } | |
73559847 AD |
405 | if (req.pending & ATIF_DGPU_DISPLAY_EVENT) { |
406 | if ((rdev->flags & RADEON_IS_PX) && | |
407 | radeon_atpx_dgpu_req_power_for_displays()) { | |
408 | pm_runtime_get_sync(rdev->ddev->dev); | |
409 | /* Just fire off a uevent and let userspace tell us what to do */ | |
410 | drm_helper_hpd_irq_event(rdev->ddev); | |
411 | pm_runtime_mark_last_busy(rdev->ddev->dev); | |
412 | pm_runtime_put_autosuspend(rdev->ddev->dev); | |
413 | } | |
414 | } | |
fda4b25c LT |
415 | /* TODO: check other events */ |
416 | ||
92fdf89a LT |
417 | /* We've handled the event, stop the notifier chain. The ACPI interface |
418 | * overloads ACPI_VIDEO_NOTIFY_PROBE, we don't want to send that to | |
419 | * userspace if the event was generated only to signal a SBIOS | |
420 | * request. | |
421 | */ | |
422 | return NOTIFY_BAD; | |
fda4b25c LT |
423 | } |
424 | ||
e3a15920 AD |
425 | /* Call the ATCS method |
426 | */ | |
427 | /** | |
428 | * radeon_atcs_call - call an ATCS method | |
429 | * | |
430 | * @handle: acpi handle | |
431 | * @function: the ATCS function to execute | |
432 | * @params: ATCS function params | |
433 | * | |
434 | * Executes the requested ATCS function (all asics). | |
435 | * Returns a pointer to the acpi output buffer. | |
436 | */ | |
437 | static union acpi_object *radeon_atcs_call(acpi_handle handle, int function, | |
438 | struct acpi_buffer *params) | |
439 | { | |
440 | acpi_status status; | |
441 | union acpi_object atcs_arg_elements[2]; | |
442 | struct acpi_object_list atcs_arg; | |
443 | struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; | |
444 | ||
445 | atcs_arg.count = 2; | |
446 | atcs_arg.pointer = &atcs_arg_elements[0]; | |
447 | ||
448 | atcs_arg_elements[0].type = ACPI_TYPE_INTEGER; | |
449 | atcs_arg_elements[0].integer.value = function; | |
450 | ||
451 | if (params) { | |
452 | atcs_arg_elements[1].type = ACPI_TYPE_BUFFER; | |
453 | atcs_arg_elements[1].buffer.length = params->length; | |
454 | atcs_arg_elements[1].buffer.pointer = params->pointer; | |
455 | } else { | |
456 | /* We need a second fake parameter */ | |
457 | atcs_arg_elements[1].type = ACPI_TYPE_INTEGER; | |
458 | atcs_arg_elements[1].integer.value = 0; | |
459 | } | |
460 | ||
461 | status = acpi_evaluate_object(handle, "ATCS", &atcs_arg, &buffer); | |
462 | ||
463 | /* Fail only if calling the method fails and ATIF is supported */ | |
464 | if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) { | |
465 | DRM_DEBUG_DRIVER("failed to evaluate ATCS got %s\n", | |
466 | acpi_format_exception(status)); | |
467 | kfree(buffer.pointer); | |
468 | return NULL; | |
469 | } | |
470 | ||
471 | return buffer.pointer; | |
472 | } | |
473 | ||
474 | /** | |
475 | * radeon_atcs_parse_functions - parse supported functions | |
476 | * | |
477 | * @f: supported functions struct | |
478 | * @mask: supported functions mask from ATCS | |
479 | * | |
480 | * Use the supported functions mask from ATCS function | |
481 | * ATCS_FUNCTION_VERIFY_INTERFACE to determine what functions | |
482 | * are supported (all asics). | |
483 | */ | |
484 | static void radeon_atcs_parse_functions(struct radeon_atcs_functions *f, u32 mask) | |
485 | { | |
486 | f->get_ext_state = mask & ATCS_GET_EXTERNAL_STATE_SUPPORTED; | |
487 | f->pcie_perf_req = mask & ATCS_PCIE_PERFORMANCE_REQUEST_SUPPORTED; | |
488 | f->pcie_dev_rdy = mask & ATCS_PCIE_DEVICE_READY_NOTIFICATION_SUPPORTED; | |
489 | f->pcie_bus_width = mask & ATCS_SET_PCIE_BUS_WIDTH_SUPPORTED; | |
490 | } | |
491 | ||
492 | /** | |
493 | * radeon_atcs_verify_interface - verify ATCS | |
494 | * | |
495 | * @handle: acpi handle | |
496 | * @atcs: radeon atcs struct | |
497 | * | |
498 | * Execute the ATCS_FUNCTION_VERIFY_INTERFACE ATCS function | |
499 | * to initialize ATCS and determine what features are supported | |
500 | * (all asics). | |
501 | * returns 0 on success, error on failure. | |
502 | */ | |
503 | static int radeon_atcs_verify_interface(acpi_handle handle, | |
504 | struct radeon_atcs *atcs) | |
505 | { | |
506 | union acpi_object *info; | |
507 | struct atcs_verify_interface output; | |
508 | size_t size; | |
509 | int err = 0; | |
510 | ||
511 | info = radeon_atcs_call(handle, ATCS_FUNCTION_VERIFY_INTERFACE, NULL); | |
512 | if (!info) | |
513 | return -EIO; | |
514 | ||
515 | memset(&output, 0, sizeof(output)); | |
516 | ||
517 | size = *(u16 *) info->buffer.pointer; | |
518 | if (size < 8) { | |
a1871936 | 519 | DRM_INFO("ATCS buffer is too small: %zu\n", size); |
e3a15920 AD |
520 | err = -EINVAL; |
521 | goto out; | |
522 | } | |
523 | size = min(sizeof(output), size); | |
524 | ||
525 | memcpy(&output, info->buffer.pointer, size); | |
526 | ||
527 | /* TODO: check version? */ | |
528 | DRM_DEBUG_DRIVER("ATCS version %u\n", output.version); | |
529 | ||
530 | radeon_atcs_parse_functions(&atcs->functions, output.function_bits); | |
531 | ||
532 | out: | |
533 | kfree(info); | |
534 | return err; | |
535 | } | |
536 | ||
e37e6a0e AD |
537 | /** |
538 | * radeon_acpi_is_pcie_performance_request_supported | |
539 | * | |
540 | * @rdev: radeon_device pointer | |
541 | * | |
542 | * Check if the ATCS pcie_perf_req and pcie_dev_rdy methods | |
543 | * are supported (all asics). | |
544 | * returns true if supported, false if not. | |
545 | */ | |
546 | bool radeon_acpi_is_pcie_performance_request_supported(struct radeon_device *rdev) | |
547 | { | |
548 | struct radeon_atcs *atcs = &rdev->atcs; | |
549 | ||
550 | if (atcs->functions.pcie_perf_req && atcs->functions.pcie_dev_rdy) | |
551 | return true; | |
552 | ||
553 | return false; | |
554 | } | |
555 | ||
556 | /** | |
557 | * radeon_acpi_pcie_notify_device_ready | |
558 | * | |
559 | * @rdev: radeon_device pointer | |
560 | * | |
561 | * Executes the PCIE_DEVICE_READY_NOTIFICATION method | |
562 | * (all asics). | |
563 | * returns 0 on success, error on failure. | |
564 | */ | |
565 | int radeon_acpi_pcie_notify_device_ready(struct radeon_device *rdev) | |
566 | { | |
567 | acpi_handle handle; | |
568 | union acpi_object *info; | |
569 | struct radeon_atcs *atcs = &rdev->atcs; | |
570 | ||
571 | /* Get the device handle */ | |
3a83f992 | 572 | handle = ACPI_HANDLE(&rdev->pdev->dev); |
e37e6a0e AD |
573 | if (!handle) |
574 | return -EINVAL; | |
575 | ||
576 | if (!atcs->functions.pcie_dev_rdy) | |
577 | return -EINVAL; | |
578 | ||
579 | info = radeon_atcs_call(handle, ATCS_FUNCTION_PCIE_DEVICE_READY_NOTIFICATION, NULL); | |
580 | if (!info) | |
581 | return -EIO; | |
582 | ||
583 | kfree(info); | |
584 | ||
585 | return 0; | |
586 | } | |
587 | ||
588 | /** | |
589 | * radeon_acpi_pcie_performance_request | |
590 | * | |
591 | * @rdev: radeon_device pointer | |
592 | * @perf_req: requested perf level (pcie gen speed) | |
593 | * @advertise: set advertise caps flag if set | |
594 | * | |
595 | * Executes the PCIE_PERFORMANCE_REQUEST method to | |
596 | * change the pcie gen speed (all asics). | |
597 | * returns 0 on success, error on failure. | |
598 | */ | |
599 | int radeon_acpi_pcie_performance_request(struct radeon_device *rdev, | |
600 | u8 perf_req, bool advertise) | |
601 | { | |
602 | acpi_handle handle; | |
603 | union acpi_object *info; | |
604 | struct radeon_atcs *atcs = &rdev->atcs; | |
605 | struct atcs_pref_req_input atcs_input; | |
606 | struct atcs_pref_req_output atcs_output; | |
607 | struct acpi_buffer params; | |
608 | size_t size; | |
609 | u32 retry = 3; | |
610 | ||
611 | /* Get the device handle */ | |
3a83f992 | 612 | handle = ACPI_HANDLE(&rdev->pdev->dev); |
e37e6a0e AD |
613 | if (!handle) |
614 | return -EINVAL; | |
615 | ||
616 | if (!atcs->functions.pcie_perf_req) | |
617 | return -EINVAL; | |
618 | ||
619 | atcs_input.size = sizeof(struct atcs_pref_req_input); | |
620 | /* client id (bit 2-0: func num, 7-3: dev num, 15-8: bus num) */ | |
621 | atcs_input.client_id = rdev->pdev->devfn | (rdev->pdev->bus->number << 8); | |
622 | atcs_input.valid_flags_mask = ATCS_VALID_FLAGS_MASK; | |
623 | atcs_input.flags = ATCS_WAIT_FOR_COMPLETION; | |
624 | if (advertise) | |
625 | atcs_input.flags |= ATCS_ADVERTISE_CAPS; | |
626 | atcs_input.req_type = ATCS_PCIE_LINK_SPEED; | |
627 | atcs_input.perf_req = perf_req; | |
628 | ||
629 | params.length = sizeof(struct atcs_pref_req_input); | |
630 | params.pointer = &atcs_input; | |
631 | ||
632 | while (retry--) { | |
633 | info = radeon_atcs_call(handle, ATCS_FUNCTION_PCIE_PERFORMANCE_REQUEST, ¶ms); | |
634 | if (!info) | |
635 | return -EIO; | |
636 | ||
637 | memset(&atcs_output, 0, sizeof(atcs_output)); | |
638 | ||
639 | size = *(u16 *) info->buffer.pointer; | |
640 | if (size < 3) { | |
641 | DRM_INFO("ATCS buffer is too small: %zu\n", size); | |
642 | kfree(info); | |
643 | return -EINVAL; | |
644 | } | |
645 | size = min(sizeof(atcs_output), size); | |
646 | ||
647 | memcpy(&atcs_output, info->buffer.pointer, size); | |
648 | ||
649 | kfree(info); | |
650 | ||
651 | switch (atcs_output.ret_val) { | |
652 | case ATCS_REQUEST_REFUSED: | |
653 | default: | |
654 | return -EINVAL; | |
655 | case ATCS_REQUEST_COMPLETE: | |
656 | return 0; | |
657 | case ATCS_REQUEST_IN_PROGRESS: | |
658 | udelay(10); | |
659 | break; | |
660 | } | |
661 | } | |
662 | ||
663 | return 0; | |
664 | } | |
665 | ||
c3c65160 AD |
666 | /** |
667 | * radeon_acpi_event - handle notify events | |
668 | * | |
669 | * @nb: notifier block | |
670 | * @val: val | |
671 | * @data: acpi event | |
672 | * | |
673 | * Calls relevant radeon functions in response to various | |
674 | * acpi events. | |
675 | * Returns NOTIFY code | |
676 | */ | |
c4917074 AD |
677 | static int radeon_acpi_event(struct notifier_block *nb, |
678 | unsigned long val, | |
679 | void *data) | |
680 | { | |
681 | struct radeon_device *rdev = container_of(nb, struct radeon_device, acpi_nb); | |
682 | struct acpi_bus_event *entry = (struct acpi_bus_event *)data; | |
683 | ||
684 | if (strcmp(entry->device_class, ACPI_AC_CLASS) == 0) { | |
685 | if (power_supply_is_system_supplied() > 0) | |
686 | DRM_DEBUG_DRIVER("pm: AC\n"); | |
687 | else | |
688 | DRM_DEBUG_DRIVER("pm: DC\n"); | |
689 | ||
690 | radeon_pm_acpi_event_handler(rdev); | |
691 | } | |
692 | ||
693 | /* Check for pending SBIOS requests */ | |
694 | return radeon_atif_handler(rdev, entry); | |
d7a2952f AM |
695 | } |
696 | ||
697 | /* Call all ACPI methods here */ | |
c3c65160 AD |
698 | /** |
699 | * radeon_acpi_init - init driver acpi support | |
700 | * | |
701 | * @rdev: radeon_device pointer | |
702 | * | |
703 | * Verifies the AMD ACPI interfaces and registers with the acpi | |
704 | * notifier chain (all asics). | |
705 | * Returns 0 on success, error on failure. | |
706 | */ | |
d7a2952f AM |
707 | int radeon_acpi_init(struct radeon_device *rdev) |
708 | { | |
709 | acpi_handle handle; | |
ce3cf821 | 710 | struct radeon_atif *atif = &rdev->atif; |
e3a15920 | 711 | struct radeon_atcs *atcs = &rdev->atcs; |
d7a2952f AM |
712 | int ret; |
713 | ||
d7a2952f | 714 | /* Get the device handle */ |
3a83f992 | 715 | handle = ACPI_HANDLE(&rdev->pdev->dev); |
d7a2952f | 716 | |
48cc9b2c JD |
717 | /* No need to proceed if we're sure that ATIF is not supported */ |
718 | if (!ASIC_IS_AVIVO(rdev) || !rdev->bios || !handle) | |
719 | return 0; | |
720 | ||
e3a15920 AD |
721 | /* Call the ATCS method */ |
722 | ret = radeon_atcs_verify_interface(handle, atcs); | |
723 | if (ret) { | |
724 | DRM_DEBUG_DRIVER("Call to ATCS verify_interface failed: %d\n", ret); | |
725 | } | |
726 | ||
d7a2952f | 727 | /* Call the ATIF method */ |
ce3cf821 LT |
728 | ret = radeon_atif_verify_interface(handle, atif); |
729 | if (ret) { | |
e3a15920 | 730 | DRM_DEBUG_DRIVER("Call to ATIF verify_interface failed: %d\n", ret); |
ce3cf821 LT |
731 | goto out; |
732 | } | |
733 | ||
fda4b25c LT |
734 | if (atif->notifications.brightness_change) { |
735 | struct drm_encoder *tmp; | |
736 | struct radeon_encoder *target = NULL; | |
737 | ||
738 | /* Find the encoder controlling the brightness */ | |
739 | list_for_each_entry(tmp, &rdev->ddev->mode_config.encoder_list, | |
740 | head) { | |
741 | struct radeon_encoder *enc = to_radeon_encoder(tmp); | |
fda4b25c LT |
742 | |
743 | if ((enc->devices & (ATOM_DEVICE_LCD_SUPPORT)) && | |
37e9b6a6 AD |
744 | enc->enc_priv) { |
745 | if (rdev->is_atom_bios) { | |
746 | struct radeon_encoder_atom_dig *dig = enc->enc_priv; | |
747 | if (dig->bl_dev) { | |
748 | target = enc; | |
749 | break; | |
750 | } | |
751 | } else { | |
752 | struct radeon_encoder_lvds *dig = enc->enc_priv; | |
753 | if (dig->bl_dev) { | |
754 | target = enc; | |
755 | break; | |
756 | } | |
757 | } | |
fda4b25c LT |
758 | } |
759 | } | |
760 | ||
37e9b6a6 | 761 | atif->encoder_for_bl = target; |
fda4b25c | 762 | } |
d7a2952f | 763 | |
ce3cf821 LT |
764 | if (atif->functions.sbios_requests && !atif->functions.system_params) { |
765 | /* XXX check this workraround, if sbios request function is | |
766 | * present we have to see how it's configured in the system | |
767 | * params | |
768 | */ | |
769 | atif->functions.system_params = true; | |
770 | } | |
771 | ||
772 | if (atif->functions.system_params) { | |
773 | ret = radeon_atif_get_notification_params(handle, | |
774 | &atif->notification_cfg); | |
775 | if (ret) { | |
776 | DRM_DEBUG_DRIVER("Call to GET_SYSTEM_PARAMS failed: %d\n", | |
777 | ret); | |
778 | /* Disable notification */ | |
779 | atif->notification_cfg.enabled = false; | |
780 | } | |
781 | } | |
d7a2952f | 782 | |
ce3cf821 | 783 | out: |
c4917074 AD |
784 | rdev->acpi_nb.notifier_call = radeon_acpi_event; |
785 | register_acpi_notifier(&rdev->acpi_nb); | |
786 | ||
86504672 | 787 | return ret; |
d7a2952f AM |
788 | } |
789 | ||
c3c65160 AD |
790 | /** |
791 | * radeon_acpi_fini - tear down driver acpi support | |
792 | * | |
793 | * @rdev: radeon_device pointer | |
794 | * | |
795 | * Unregisters with the acpi notifier chain (all asics). | |
796 | */ | |
c4917074 AD |
797 | void radeon_acpi_fini(struct radeon_device *rdev) |
798 | { | |
799 | unregister_acpi_notifier(&rdev->acpi_nb); | |
800 | } |