1 /*
2 * Copyright 2008 Intel Corporation <hong.liu@intel.com>
3 * Copyright 2008 Red Hat <mjg@redhat.com>
4 *
5 * Permission is hereby granted, free of charge, to any person obtaining
6 * a copy of this software and associated documentation files (the
7 * "Software"), to deal in the Software without restriction, including
8 * without limitation the rights to use, copy, modify, merge, publish,
9 * distribute, sub license, and/or sell copies of the Software, and to
10 * permit persons to whom the Software is furnished to do so, subject to
11 * the following conditions:
12 *
13 * The above copyright notice and this permission notice (including the
14 * next paragraph) shall be included in all copies or substantial
15 * portions of the Software.
16 *
17 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
18 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
19 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
20 * NON-INFRINGEMENT. IN NO EVENT SHALL INTEL AND/OR ITS SUPPLIERS BE
21 * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
22 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
23 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
24 * SOFTWARE.
25 *
26 */
27
28 #include <linux/acpi.h>
29 #include <linux/dmi.h>
30 #include <acpi/video.h>
31
32 #include <drm/drm_edid.h>
33
34 #include "i915_drv.h"
35 #include "intel_acpi.h"
36 #include "intel_backlight.h"
37 #include "intel_display_types.h"
38 #include "intel_opregion.h"
39 #include "intel_pci_config.h"
40
41 #define OPREGION_HEADER_OFFSET 0
42 #define OPREGION_ACPI_OFFSET 0x100
43 #define ACPI_CLID 0x01ac /* current lid state indicator */
44 #define ACPI_CDCK 0x01b0 /* current docking state indicator */
45 #define OPREGION_SWSCI_OFFSET 0x200
46 #define OPREGION_ASLE_OFFSET 0x300
47 #define OPREGION_VBT_OFFSET 0x400
48 #define OPREGION_ASLE_EXT_OFFSET 0x1C00
49
50 #define OPREGION_SIGNATURE "IntelGraphicsMem"
51 #define MBOX_ACPI BIT(0) /* Mailbox #1 */
52 #define MBOX_SWSCI BIT(1) /* Mailbox #2 (obsolete from v2.x) */
53 #define MBOX_ASLE BIT(2) /* Mailbox #3 */
54 #define MBOX_ASLE_EXT BIT(4) /* Mailbox #5 */
55 #define MBOX_BACKLIGHT BIT(5) /* Mailbox #2 (valid from v3.x) */
56
57 #define PCON_HEADLESS_SKU BIT(13)
58
59 struct opregion_header {
60 u8 signature[16];
61 u32 size;
62 struct {
63 u8 rsvd;
64 u8 revision;
65 u8 minor;
66 u8 major;
67 } __packed over;
68 u8 bios_ver[32];
69 u8 vbios_ver[16];
70 u8 driver_ver[16];
71 u32 mboxes;
72 u32 driver_model;
73 u32 pcon;
74 u8 dver[32];
75 u8 rsvd[124];
76 } __packed;
77
78 /* OpRegion mailbox #1: public ACPI methods */
79 struct opregion_acpi {
80 u32 drdy; /* driver readiness */
81 u32 csts; /* notification status */
82 u32 cevt; /* current event */
83 u8 rsvd1[20];
84 u32 didl[8]; /* supported display devices ID list */
85 u32 cpdl[8]; /* currently presented display list */
86 u32 cadl[8]; /* currently active display list */
87 u32 nadl[8]; /* next active devices list */
88 u32 aslp; /* ASL sleep time-out */
89 u32 tidx; /* toggle table index */
90 u32 chpd; /* current hotplug enable indicator */
91 u32 clid; /* current lid state*/
92 u32 cdck; /* current docking state */
93 u32 sxsw; /* Sx state resume */
94 u32 evts; /* ASL supported events */
95 u32 cnot; /* current OS notification */
96 u32 nrdy; /* driver status */
97 u32 did2[7]; /* extended supported display devices ID list */
98 u32 cpd2[7]; /* extended attached display devices list */
99 u8 rsvd2[4];
100 } __packed;
101
102 /* OpRegion mailbox #2: SWSCI */
103 struct opregion_swsci {
104 u32 scic; /* SWSCI command|status|data */
105 u32 parm; /* command parameters */
106 u32 dslp; /* driver sleep time-out */
107 u8 rsvd[244];
108 } __packed;
109
110 /* OpRegion mailbox #3: ASLE */
111 struct opregion_asle {
112 u32 ardy; /* driver readiness */
113 u32 aslc; /* ASLE interrupt command */
114 u32 tche; /* technology enabled indicator */
115 u32 alsi; /* current ALS illuminance reading */
116 u32 bclp; /* backlight brightness to set */
117 u32 pfit; /* panel fitting state */
118 u32 cblv; /* current brightness level */
119 u16 bclm[20]; /* backlight level duty cycle mapping table */
120 u32 cpfm; /* current panel fitting mode */
121 u32 epfm; /* enabled panel fitting modes */
122 u8 plut[74]; /* panel LUT and identifier */
123 u32 pfmb; /* PWM freq and min brightness */
124 u32 cddv; /* color correction default values */
125 u32 pcft; /* power conservation features */
126 u32 srot; /* supported rotation angles */
127 u32 iuer; /* IUER events */
128 u64 fdss;
129 u32 fdsp;
130 u32 stat;
131 u64 rvda; /* Physical (2.0) or relative from opregion (2.1+)
132 * address of raw VBT data. */
133 u32 rvds; /* Size of raw vbt data */
134 u8 rsvd[58];
135 } __packed;
136
137 /* OpRegion mailbox #5: ASLE ext */
138 struct opregion_asle_ext {
139 u32 phed; /* Panel Header */
140 u8 bddc[256]; /* Panel EDID */
141 u8 rsvd[764];
142 } __packed;
143
144 /* Driver readiness indicator */
145 #define ASLE_ARDY_READY (1 << 0)
146 #define ASLE_ARDY_NOT_READY (0 << 0)
147
148 /* ASLE Interrupt Command (ASLC) bits */
149 #define ASLC_SET_ALS_ILLUM (1 << 0)
150 #define ASLC_SET_BACKLIGHT (1 << 1)
151 #define ASLC_SET_PFIT (1 << 2)
152 #define ASLC_SET_PWM_FREQ (1 << 3)
153 #define ASLC_SUPPORTED_ROTATION_ANGLES (1 << 4)
154 #define ASLC_BUTTON_ARRAY (1 << 5)
155 #define ASLC_CONVERTIBLE_INDICATOR (1 << 6)
156 #define ASLC_DOCKING_INDICATOR (1 << 7)
157 #define ASLC_ISCT_STATE_CHANGE (1 << 8)
158 #define ASLC_REQ_MSK 0x1ff
159 /* response bits */
160 #define ASLC_ALS_ILLUM_FAILED (1 << 10)
161 #define ASLC_BACKLIGHT_FAILED (1 << 12)
162 #define ASLC_PFIT_FAILED (1 << 14)
163 #define ASLC_PWM_FREQ_FAILED (1 << 16)
164 #define ASLC_ROTATION_ANGLES_FAILED (1 << 18)
165 #define ASLC_BUTTON_ARRAY_FAILED (1 << 20)
166 #define ASLC_CONVERTIBLE_FAILED (1 << 22)
167 #define ASLC_DOCKING_FAILED (1 << 24)
168 #define ASLC_ISCT_STATE_FAILED (1 << 26)
169
170 /* Technology enabled indicator */
171 #define ASLE_TCHE_ALS_EN (1 << 0)
172 #define ASLE_TCHE_BLC_EN (1 << 1)
173 #define ASLE_TCHE_PFIT_EN (1 << 2)
174 #define ASLE_TCHE_PFMB_EN (1 << 3)
175
176 /* ASLE backlight brightness to set */
177 #define ASLE_BCLP_VALID (1<<31)
178 #define ASLE_BCLP_MSK (~(1<<31))
179
180 /* ASLE panel fitting request */
181 #define ASLE_PFIT_VALID (1<<31)
182 #define ASLE_PFIT_CENTER (1<<0)
183 #define ASLE_PFIT_STRETCH_TEXT (1<<1)
184 #define ASLE_PFIT_STRETCH_GFX (1<<2)
185
186 /* PWM frequency and minimum brightness */
187 #define ASLE_PFMB_BRIGHTNESS_MASK (0xff)
188 #define ASLE_PFMB_BRIGHTNESS_VALID (1<<8)
189 #define ASLE_PFMB_PWM_MASK (0x7ffffe00)
190 #define ASLE_PFMB_PWM_VALID (1<<31)
191
192 #define ASLE_CBLV_VALID (1<<31)
193
194 /* IUER */
195 #define ASLE_IUER_DOCKING (1 << 7)
196 #define ASLE_IUER_CONVERTIBLE (1 << 6)
197 #define ASLE_IUER_ROTATION_LOCK_BTN (1 << 4)
198 #define ASLE_IUER_VOLUME_DOWN_BTN (1 << 3)
199 #define ASLE_IUER_VOLUME_UP_BTN (1 << 2)
200 #define ASLE_IUER_WINDOWS_BTN (1 << 1)
201 #define ASLE_IUER_POWER_BTN (1 << 0)
202
203 #define ASLE_PHED_EDID_VALID_MASK 0x3
204
205 /* Software System Control Interrupt (SWSCI) */
206 #define SWSCI_SCIC_INDICATOR (1 << 0)
207 #define SWSCI_SCIC_MAIN_FUNCTION_SHIFT 1
208 #define SWSCI_SCIC_MAIN_FUNCTION_MASK (0xf << 1)
209 #define SWSCI_SCIC_SUB_FUNCTION_SHIFT 8
210 #define SWSCI_SCIC_SUB_FUNCTION_MASK (0xff << 8)
211 #define SWSCI_SCIC_EXIT_PARAMETER_SHIFT 8
212 #define SWSCI_SCIC_EXIT_PARAMETER_MASK (0xff << 8)
213 #define SWSCI_SCIC_EXIT_STATUS_SHIFT 5
214 #define SWSCI_SCIC_EXIT_STATUS_MASK (7 << 5)
215 #define SWSCI_SCIC_EXIT_STATUS_SUCCESS 1
216
217 #define SWSCI_FUNCTION_CODE(main, sub) \
218 ((main) << SWSCI_SCIC_MAIN_FUNCTION_SHIFT | \
219 (sub) << SWSCI_SCIC_SUB_FUNCTION_SHIFT)
220
221 /* SWSCI: Get BIOS Data (GBDA) */
222 #define SWSCI_GBDA 4
223 #define SWSCI_GBDA_SUPPORTED_CALLS SWSCI_FUNCTION_CODE(SWSCI_GBDA, 0)
224 #define SWSCI_GBDA_REQUESTED_CALLBACKS SWSCI_FUNCTION_CODE(SWSCI_GBDA, 1)
225 #define SWSCI_GBDA_BOOT_DISPLAY_PREF SWSCI_FUNCTION_CODE(SWSCI_GBDA, 4)
226 #define SWSCI_GBDA_PANEL_DETAILS SWSCI_FUNCTION_CODE(SWSCI_GBDA, 5)
227 #define SWSCI_GBDA_TV_STANDARD SWSCI_FUNCTION_CODE(SWSCI_GBDA, 6)
228 #define SWSCI_GBDA_INTERNAL_GRAPHICS SWSCI_FUNCTION_CODE(SWSCI_GBDA, 7)
229 #define SWSCI_GBDA_SPREAD_SPECTRUM SWSCI_FUNCTION_CODE(SWSCI_GBDA, 10)
230
231 /* SWSCI: System BIOS Callbacks (SBCB) */
232 #define SWSCI_SBCB 6
233 #define SWSCI_SBCB_SUPPORTED_CALLBACKS SWSCI_FUNCTION_CODE(SWSCI_SBCB, 0)
234 #define SWSCI_SBCB_INIT_COMPLETION SWSCI_FUNCTION_CODE(SWSCI_SBCB, 1)
235 #define SWSCI_SBCB_PRE_HIRES_SET_MODE SWSCI_FUNCTION_CODE(SWSCI_SBCB, 3)
236 #define SWSCI_SBCB_POST_HIRES_SET_MODE SWSCI_FUNCTION_CODE(SWSCI_SBCB, 4)
237 #define SWSCI_SBCB_DISPLAY_SWITCH SWSCI_FUNCTION_CODE(SWSCI_SBCB, 5)
238 #define SWSCI_SBCB_SET_TV_FORMAT SWSCI_FUNCTION_CODE(SWSCI_SBCB, 6)
239 #define SWSCI_SBCB_ADAPTER_POWER_STATE SWSCI_FUNCTION_CODE(SWSCI_SBCB, 7)
240 #define SWSCI_SBCB_DISPLAY_POWER_STATE SWSCI_FUNCTION_CODE(SWSCI_SBCB, 8)
241 #define SWSCI_SBCB_SET_BOOT_DISPLAY SWSCI_FUNCTION_CODE(SWSCI_SBCB, 9)
242 #define SWSCI_SBCB_SET_PANEL_DETAILS SWSCI_FUNCTION_CODE(SWSCI_SBCB, 10)
243 #define SWSCI_SBCB_SET_INTERNAL_GFX SWSCI_FUNCTION_CODE(SWSCI_SBCB, 11)
244 #define SWSCI_SBCB_POST_HIRES_TO_DOS_FS SWSCI_FUNCTION_CODE(SWSCI_SBCB, 16)
245 #define SWSCI_SBCB_SUSPEND_RESUME SWSCI_FUNCTION_CODE(SWSCI_SBCB, 17)
246 #define SWSCI_SBCB_SET_SPREAD_SPECTRUM SWSCI_FUNCTION_CODE(SWSCI_SBCB, 18)
247 #define SWSCI_SBCB_POST_VBE_PM SWSCI_FUNCTION_CODE(SWSCI_SBCB, 19)
248 #define SWSCI_SBCB_ENABLE_DISABLE_AUDIO SWSCI_FUNCTION_CODE(SWSCI_SBCB, 21)
249
250 #define MAX_DSLP 1500
251
252 #define OPREGION_SIZE (8 * 1024)
253
254 struct intel_opregion {
255 struct intel_display *display;
256
257 struct opregion_header *header;
258 struct opregion_acpi *acpi;
259 struct opregion_swsci *swsci;
260 u32 swsci_gbda_sub_functions;
261 u32 swsci_sbcb_sub_functions;
262 struct opregion_asle *asle;
263 struct opregion_asle_ext *asle_ext;
264 void *rvda;
265 const void *vbt;
266 u32 vbt_size;
267 struct work_struct asle_work;
268 struct notifier_block acpi_notifier;
269 };
270
check_swsci_function(struct intel_display * display,u32 function)271 static int check_swsci_function(struct intel_display *display, u32 function)
272 {
273 struct intel_opregion *opregion = display->opregion;
274 struct opregion_swsci *swsci;
275 u32 main_function, sub_function;
276
277 if (!opregion)
278 return -ENODEV;
279
280 swsci = opregion->swsci;
281 if (!swsci)
282 return -ENODEV;
283
284 main_function = (function & SWSCI_SCIC_MAIN_FUNCTION_MASK) >>
285 SWSCI_SCIC_MAIN_FUNCTION_SHIFT;
286 sub_function = (function & SWSCI_SCIC_SUB_FUNCTION_MASK) >>
287 SWSCI_SCIC_SUB_FUNCTION_SHIFT;
288
289 /* Check if we can call the function. See swsci_setup for details. */
290 if (main_function == SWSCI_SBCB) {
291 if ((opregion->swsci_sbcb_sub_functions &
292 (1 << sub_function)) == 0)
293 return -EINVAL;
294 } else if (main_function == SWSCI_GBDA) {
295 if ((opregion->swsci_gbda_sub_functions &
296 (1 << sub_function)) == 0)
297 return -EINVAL;
298 }
299
300 return 0;
301 }
302
swsci(struct intel_display * display,u32 function,u32 parm,u32 * parm_out)303 static int swsci(struct intel_display *display,
304 u32 function, u32 parm, u32 *parm_out)
305 {
306 struct opregion_swsci *swsci;
307 struct pci_dev *pdev = to_pci_dev(display->drm->dev);
308 u32 scic, dslp;
309 u16 swsci_val;
310 int ret;
311
312 ret = check_swsci_function(display, function);
313 if (ret)
314 return ret;
315
316 swsci = display->opregion->swsci;
317
318 /* Driver sleep timeout in ms. */
319 dslp = swsci->dslp;
320 if (!dslp) {
321 /* The spec says 2ms should be the default, but it's too small
322 * for some machines. */
323 dslp = 50;
324 } else if (dslp > MAX_DSLP) {
325 /* Hey bios, trust must be earned. */
326 DRM_INFO_ONCE("ACPI BIOS requests an excessive sleep of %u ms, "
327 "using %u ms instead\n", dslp, MAX_DSLP);
328 dslp = MAX_DSLP;
329 }
330
331 /* The spec tells us to do this, but we are the only user... */
332 scic = swsci->scic;
333 if (scic & SWSCI_SCIC_INDICATOR) {
334 drm_dbg(display->drm, "SWSCI request already in progress\n");
335 return -EBUSY;
336 }
337
338 scic = function | SWSCI_SCIC_INDICATOR;
339
340 swsci->parm = parm;
341 swsci->scic = scic;
342
343 /* Ensure SCI event is selected and event trigger is cleared. */
344 pci_read_config_word(pdev, SWSCI, &swsci_val);
345 if (!(swsci_val & SWSCI_SCISEL) || (swsci_val & SWSCI_GSSCIE)) {
346 swsci_val |= SWSCI_SCISEL;
347 swsci_val &= ~SWSCI_GSSCIE;
348 pci_write_config_word(pdev, SWSCI, swsci_val);
349 }
350
351 /* Use event trigger to tell bios to check the mail. */
352 swsci_val |= SWSCI_GSSCIE;
353 pci_write_config_word(pdev, SWSCI, swsci_val);
354
355 /* Poll for the result. */
356 #define C (((scic = swsci->scic) & SWSCI_SCIC_INDICATOR) == 0)
357 if (wait_for(C, dslp)) {
358 drm_dbg(display->drm, "SWSCI request timed out\n");
359 return -ETIMEDOUT;
360 }
361
362 scic = (scic & SWSCI_SCIC_EXIT_STATUS_MASK) >>
363 SWSCI_SCIC_EXIT_STATUS_SHIFT;
364
365 /* Note: scic == 0 is an error! */
366 if (scic != SWSCI_SCIC_EXIT_STATUS_SUCCESS) {
367 drm_dbg(display->drm, "SWSCI request error %u\n", scic);
368 return -EIO;
369 }
370
371 if (parm_out)
372 *parm_out = swsci->parm;
373
374 return 0;
375
376 #undef C
377 }
378
379 #define DISPLAY_TYPE_CRT 0
380 #define DISPLAY_TYPE_TV 1
381 #define DISPLAY_TYPE_EXTERNAL_FLAT_PANEL 2
382 #define DISPLAY_TYPE_INTERNAL_FLAT_PANEL 3
383
intel_opregion_notify_encoder(struct intel_encoder * encoder,bool enable)384 int intel_opregion_notify_encoder(struct intel_encoder *encoder,
385 bool enable)
386 {
387 struct intel_display *display = to_intel_display(encoder);
388 u32 parm = 0;
389 u32 type = 0;
390 u32 port;
391 int ret;
392
393 /* don't care about old stuff for now */
394 if (!HAS_DDI(display))
395 return 0;
396
397 /* Avoid port out of bounds checks if SWSCI isn't there. */
398 ret = check_swsci_function(display, SWSCI_SBCB_DISPLAY_POWER_STATE);
399 if (ret)
400 return ret;
401
402 if (encoder->type == INTEL_OUTPUT_DSI)
403 port = 0;
404 else
405 port = encoder->port;
406
407 if (port == PORT_E) {
408 port = 0;
409 } else {
410 parm |= 1 << port;
411 port++;
412 }
413
414 /*
415 * The port numbering and mapping here is bizarre. The now-obsolete
416 * swsci spec supports ports numbered [0..4]. Port E is handled as a
417 * special case, but port F and beyond are not. The functionality is
418 * supposed to be obsolete for new platforms. Just bail out if the port
419 * number is out of bounds after mapping.
420 */
421 if (port > 4) {
422 drm_dbg_kms(display->drm,
423 "[ENCODER:%d:%s] port %c (index %u) out of bounds for display power state notification\n",
424 encoder->base.base.id, encoder->base.name,
425 port_name(encoder->port), port);
426 return -EINVAL;
427 }
428
429 if (!enable)
430 parm |= 4 << 8;
431
432 switch (encoder->type) {
433 case INTEL_OUTPUT_ANALOG:
434 type = DISPLAY_TYPE_CRT;
435 break;
436 case INTEL_OUTPUT_DDI:
437 case INTEL_OUTPUT_DP:
438 case INTEL_OUTPUT_HDMI:
439 case INTEL_OUTPUT_DP_MST:
440 type = DISPLAY_TYPE_EXTERNAL_FLAT_PANEL;
441 break;
442 case INTEL_OUTPUT_EDP:
443 case INTEL_OUTPUT_DSI:
444 type = DISPLAY_TYPE_INTERNAL_FLAT_PANEL;
445 break;
446 default:
447 drm_WARN_ONCE(display->drm, 1,
448 "unsupported intel_encoder type %d\n",
449 encoder->type);
450 return -EINVAL;
451 }
452
453 parm |= type << (16 + port * 3);
454
455 return swsci(display, SWSCI_SBCB_DISPLAY_POWER_STATE, parm, NULL);
456 }
457
458 static const struct {
459 pci_power_t pci_power_state;
460 u32 parm;
461 } power_state_map[] = {
462 { PCI_D0, 0x00 },
463 { PCI_D1, 0x01 },
464 { PCI_D2, 0x02 },
465 { PCI_D3hot, 0x04 },
466 { PCI_D3cold, 0x04 },
467 };
468
intel_opregion_notify_adapter(struct intel_display * display,pci_power_t state)469 int intel_opregion_notify_adapter(struct intel_display *display,
470 pci_power_t state)
471 {
472 int i;
473
474 if (!HAS_DDI(display))
475 return 0;
476
477 for (i = 0; i < ARRAY_SIZE(power_state_map); i++) {
478 if (state == power_state_map[i].pci_power_state)
479 return swsci(display, SWSCI_SBCB_ADAPTER_POWER_STATE,
480 power_state_map[i].parm, NULL);
481 }
482
483 return -EINVAL;
484 }
485
asle_set_backlight(struct intel_display * display,u32 bclp)486 static u32 asle_set_backlight(struct intel_display *display, u32 bclp)
487 {
488 struct intel_connector *connector;
489 struct drm_connector_list_iter conn_iter;
490 struct opregion_asle *asle = display->opregion->asle;
491
492 drm_dbg(display->drm, "bclp = 0x%08x\n", bclp);
493
494 if (acpi_video_get_backlight_type() == acpi_backlight_native) {
495 drm_dbg_kms(display->drm,
496 "opregion backlight request ignored\n");
497 return 0;
498 }
499
500 if (!(bclp & ASLE_BCLP_VALID))
501 return ASLC_BACKLIGHT_FAILED;
502
503 bclp &= ASLE_BCLP_MSK;
504 if (bclp > 255)
505 return ASLC_BACKLIGHT_FAILED;
506
507 drm_modeset_lock(&display->drm->mode_config.connection_mutex, NULL);
508
509 /*
510 * Update backlight on all connectors that support backlight (usually
511 * only one).
512 */
513 drm_dbg_kms(display->drm, "updating opregion backlight %d/255\n",
514 bclp);
515 drm_connector_list_iter_begin(display->drm, &conn_iter);
516 for_each_intel_connector_iter(connector, &conn_iter)
517 intel_backlight_set_acpi(connector->base.state, bclp, 255);
518 drm_connector_list_iter_end(&conn_iter);
519 asle->cblv = DIV_ROUND_UP(bclp * 100, 255) | ASLE_CBLV_VALID;
520
521 drm_modeset_unlock(&display->drm->mode_config.connection_mutex);
522
523
524 return 0;
525 }
526
asle_set_als_illum(struct intel_display * display,u32 alsi)527 static u32 asle_set_als_illum(struct intel_display *display, u32 alsi)
528 {
529 /* alsi is the current ALS reading in lux. 0 indicates below sensor
530 range, 0xffff indicates above sensor range. 1-0xfffe are valid */
531 drm_dbg(display->drm, "Illum is not supported\n");
532 return ASLC_ALS_ILLUM_FAILED;
533 }
534
asle_set_pwm_freq(struct intel_display * display,u32 pfmb)535 static u32 asle_set_pwm_freq(struct intel_display *display, u32 pfmb)
536 {
537 drm_dbg(display->drm, "PWM freq is not supported\n");
538 return ASLC_PWM_FREQ_FAILED;
539 }
540
asle_set_pfit(struct intel_display * display,u32 pfit)541 static u32 asle_set_pfit(struct intel_display *display, u32 pfit)
542 {
543 /* Panel fitting is currently controlled by the X code, so this is a
544 noop until modesetting support works fully */
545 drm_dbg(display->drm, "Pfit is not supported\n");
546 return ASLC_PFIT_FAILED;
547 }
548
asle_set_supported_rotation_angles(struct intel_display * display,u32 srot)549 static u32 asle_set_supported_rotation_angles(struct intel_display *display, u32 srot)
550 {
551 drm_dbg(display->drm, "SROT is not supported\n");
552 return ASLC_ROTATION_ANGLES_FAILED;
553 }
554
asle_set_button_array(struct intel_display * display,u32 iuer)555 static u32 asle_set_button_array(struct intel_display *display, u32 iuer)
556 {
557 if (!iuer)
558 drm_dbg(display->drm,
559 "Button array event is not supported (nothing)\n");
560 if (iuer & ASLE_IUER_ROTATION_LOCK_BTN)
561 drm_dbg(display->drm,
562 "Button array event is not supported (rotation lock)\n");
563 if (iuer & ASLE_IUER_VOLUME_DOWN_BTN)
564 drm_dbg(display->drm,
565 "Button array event is not supported (volume down)\n");
566 if (iuer & ASLE_IUER_VOLUME_UP_BTN)
567 drm_dbg(display->drm,
568 "Button array event is not supported (volume up)\n");
569 if (iuer & ASLE_IUER_WINDOWS_BTN)
570 drm_dbg(display->drm,
571 "Button array event is not supported (windows)\n");
572 if (iuer & ASLE_IUER_POWER_BTN)
573 drm_dbg(display->drm,
574 "Button array event is not supported (power)\n");
575
576 return ASLC_BUTTON_ARRAY_FAILED;
577 }
578
asle_set_convertible(struct intel_display * display,u32 iuer)579 static u32 asle_set_convertible(struct intel_display *display, u32 iuer)
580 {
581 if (iuer & ASLE_IUER_CONVERTIBLE)
582 drm_dbg(display->drm,
583 "Convertible is not supported (clamshell)\n");
584 else
585 drm_dbg(display->drm,
586 "Convertible is not supported (slate)\n");
587
588 return ASLC_CONVERTIBLE_FAILED;
589 }
590
asle_set_docking(struct intel_display * display,u32 iuer)591 static u32 asle_set_docking(struct intel_display *display, u32 iuer)
592 {
593 if (iuer & ASLE_IUER_DOCKING)
594 drm_dbg(display->drm, "Docking is not supported (docked)\n");
595 else
596 drm_dbg(display->drm,
597 "Docking is not supported (undocked)\n");
598
599 return ASLC_DOCKING_FAILED;
600 }
601
asle_isct_state(struct intel_display * display)602 static u32 asle_isct_state(struct intel_display *display)
603 {
604 drm_dbg(display->drm, "ISCT is not supported\n");
605 return ASLC_ISCT_STATE_FAILED;
606 }
607
asle_work(struct work_struct * work)608 static void asle_work(struct work_struct *work)
609 {
610 struct intel_opregion *opregion =
611 container_of(work, struct intel_opregion, asle_work);
612 struct intel_display *display = opregion->display;
613 struct opregion_asle *asle = opregion->asle;
614 u32 aslc_stat = 0;
615 u32 aslc_req;
616
617 if (!asle)
618 return;
619
620 aslc_req = asle->aslc;
621
622 if (!(aslc_req & ASLC_REQ_MSK)) {
623 drm_dbg(display->drm,
624 "No request on ASLC interrupt 0x%08x\n", aslc_req);
625 return;
626 }
627
628 if (aslc_req & ASLC_SET_ALS_ILLUM)
629 aslc_stat |= asle_set_als_illum(display, asle->alsi);
630
631 if (aslc_req & ASLC_SET_BACKLIGHT)
632 aslc_stat |= asle_set_backlight(display, asle->bclp);
633
634 if (aslc_req & ASLC_SET_PFIT)
635 aslc_stat |= asle_set_pfit(display, asle->pfit);
636
637 if (aslc_req & ASLC_SET_PWM_FREQ)
638 aslc_stat |= asle_set_pwm_freq(display, asle->pfmb);
639
640 if (aslc_req & ASLC_SUPPORTED_ROTATION_ANGLES)
641 aslc_stat |= asle_set_supported_rotation_angles(display,
642 asle->srot);
643
644 if (aslc_req & ASLC_BUTTON_ARRAY)
645 aslc_stat |= asle_set_button_array(display, asle->iuer);
646
647 if (aslc_req & ASLC_CONVERTIBLE_INDICATOR)
648 aslc_stat |= asle_set_convertible(display, asle->iuer);
649
650 if (aslc_req & ASLC_DOCKING_INDICATOR)
651 aslc_stat |= asle_set_docking(display, asle->iuer);
652
653 if (aslc_req & ASLC_ISCT_STATE_CHANGE)
654 aslc_stat |= asle_isct_state(display);
655
656 asle->aslc = aslc_stat;
657 }
658
intel_opregion_asle_present(struct intel_display * display)659 bool intel_opregion_asle_present(struct intel_display *display)
660 {
661 return display->opregion && display->opregion->asle;
662 }
663
intel_opregion_asle_intr(struct intel_display * display)664 void intel_opregion_asle_intr(struct intel_display *display)
665 {
666 struct drm_i915_private *i915 = to_i915(display->drm);
667 struct intel_opregion *opregion = display->opregion;
668
669 if (opregion && opregion->asle)
670 queue_work(i915->unordered_wq, &opregion->asle_work);
671 }
672
673 #define ACPI_EV_DISPLAY_SWITCH (1<<0)
674 #define ACPI_EV_LID (1<<1)
675 #define ACPI_EV_DOCK (1<<2)
676
677 /*
678 * The only video events relevant to opregion are 0x80. These indicate either a
679 * docking event, lid switch or display switch request. In Linux, these are
680 * handled by the dock, button and video drivers.
681 */
intel_opregion_video_event(struct notifier_block * nb,unsigned long val,void * data)682 static int intel_opregion_video_event(struct notifier_block *nb,
683 unsigned long val, void *data)
684 {
685 struct intel_opregion *opregion = container_of(nb, struct intel_opregion,
686 acpi_notifier);
687 struct acpi_bus_event *event = data;
688 struct opregion_acpi *acpi;
689 int ret = NOTIFY_OK;
690
691 if (strcmp(event->device_class, ACPI_VIDEO_CLASS) != 0)
692 return NOTIFY_DONE;
693
694 acpi = opregion->acpi;
695
696 if (event->type == 0x80 && ((acpi->cevt & 1) == 0))
697 ret = NOTIFY_BAD;
698
699 acpi->csts = 0;
700
701 return ret;
702 }
703
704 /*
705 * Initialise the DIDL field in opregion. This passes a list of devices to
706 * the firmware. Values are defined by section B.4.2 of the ACPI specification
707 * (version 3)
708 */
709
set_did(struct intel_opregion * opregion,int i,u32 val)710 static void set_did(struct intel_opregion *opregion, int i, u32 val)
711 {
712 if (i < ARRAY_SIZE(opregion->acpi->didl)) {
713 opregion->acpi->didl[i] = val;
714 } else {
715 i -= ARRAY_SIZE(opregion->acpi->didl);
716
717 if (WARN_ON(i >= ARRAY_SIZE(opregion->acpi->did2)))
718 return;
719
720 opregion->acpi->did2[i] = val;
721 }
722 }
723
intel_didl_outputs(struct intel_display * display)724 static void intel_didl_outputs(struct intel_display *display)
725 {
726 struct intel_opregion *opregion = display->opregion;
727 struct intel_connector *connector;
728 struct drm_connector_list_iter conn_iter;
729 int i = 0, max_outputs;
730
731 /*
732 * In theory, did2, the extended didl, gets added at opregion version
733 * 3.0. In practice, however, we're supposed to set it for earlier
734 * versions as well, since a BIOS that doesn't understand did2 should
735 * not look at it anyway. Use a variable so we can tweak this if a need
736 * arises later.
737 */
738 max_outputs = ARRAY_SIZE(opregion->acpi->didl) +
739 ARRAY_SIZE(opregion->acpi->did2);
740
741 intel_acpi_device_id_update(display);
742
743 drm_connector_list_iter_begin(display->drm, &conn_iter);
744 for_each_intel_connector_iter(connector, &conn_iter) {
745 if (i < max_outputs)
746 set_did(opregion, i, connector->acpi_device_id);
747 i++;
748 }
749 drm_connector_list_iter_end(&conn_iter);
750
751 drm_dbg_kms(display->drm, "%d outputs detected\n", i);
752
753 if (i > max_outputs)
754 drm_err(display->drm,
755 "More than %d outputs in connector list\n",
756 max_outputs);
757
758 /* If fewer than max outputs, the list must be null terminated */
759 if (i < max_outputs)
760 set_did(opregion, i, 0);
761 }
762
intel_setup_cadls(struct intel_display * display)763 static void intel_setup_cadls(struct intel_display *display)
764 {
765 struct intel_opregion *opregion = display->opregion;
766 struct intel_connector *connector;
767 struct drm_connector_list_iter conn_iter;
768 int i = 0;
769
770 /*
771 * Initialize the CADL field from the connector device ids. This is
772 * essentially the same as copying from the DIDL. Technically, this is
773 * not always correct as display outputs may exist, but not active. This
774 * initialization is necessary for some Clevo laptops that check this
775 * field before processing the brightness and display switching hotkeys.
776 *
777 * Note that internal panels should be at the front of the connector
778 * list already, ensuring they're not left out.
779 */
780 drm_connector_list_iter_begin(display->drm, &conn_iter);
781 for_each_intel_connector_iter(connector, &conn_iter) {
782 if (i >= ARRAY_SIZE(opregion->acpi->cadl))
783 break;
784 opregion->acpi->cadl[i++] = connector->acpi_device_id;
785 }
786 drm_connector_list_iter_end(&conn_iter);
787
788 /* If fewer than 8 active devices, the list must be null terminated */
789 if (i < ARRAY_SIZE(opregion->acpi->cadl))
790 opregion->acpi->cadl[i] = 0;
791 }
792
swsci_setup(struct intel_display * display)793 static void swsci_setup(struct intel_display *display)
794 {
795 struct intel_opregion *opregion = display->opregion;
796 bool requested_callbacks = false;
797 u32 tmp;
798
799 /* Sub-function code 0 is okay, let's allow them. */
800 opregion->swsci_gbda_sub_functions = 1;
801 opregion->swsci_sbcb_sub_functions = 1;
802
803 /* We use GBDA to ask for supported GBDA calls. */
804 if (swsci(display, SWSCI_GBDA_SUPPORTED_CALLS, 0, &tmp) == 0) {
805 /* make the bits match the sub-function codes */
806 tmp <<= 1;
807 opregion->swsci_gbda_sub_functions |= tmp;
808 }
809
810 /*
811 * We also use GBDA to ask for _requested_ SBCB callbacks. The driver
812 * must not call interfaces that are not specifically requested by the
813 * bios.
814 */
815 if (swsci(display, SWSCI_GBDA_REQUESTED_CALLBACKS, 0, &tmp) == 0) {
816 /* here, the bits already match sub-function codes */
817 opregion->swsci_sbcb_sub_functions |= tmp;
818 requested_callbacks = true;
819 }
820
821 /*
822 * But we use SBCB to ask for _supported_ SBCB calls. This does not mean
823 * the callback is _requested_. But we still can't call interfaces that
824 * are not requested.
825 */
826 if (swsci(display, SWSCI_SBCB_SUPPORTED_CALLBACKS, 0, &tmp) == 0) {
827 /* make the bits match the sub-function codes */
828 u32 low = tmp & 0x7ff;
829 u32 high = tmp & ~0xfff; /* bit 11 is reserved */
830 tmp = (high << 4) | (low << 1) | 1;
831
832 /* best guess what to do with supported wrt requested */
833 if (requested_callbacks) {
834 u32 req = opregion->swsci_sbcb_sub_functions;
835 if ((req & tmp) != req)
836 drm_dbg(display->drm,
837 "SWSCI BIOS requested (%08x) SBCB callbacks that are not supported (%08x)\n",
838 req, tmp);
839 /* XXX: for now, trust the requested callbacks */
840 /* opregion->swsci_sbcb_sub_functions &= tmp; */
841 } else {
842 opregion->swsci_sbcb_sub_functions |= tmp;
843 }
844 }
845
846 drm_dbg(display->drm,
847 "SWSCI GBDA callbacks %08x, SBCB callbacks %08x\n",
848 opregion->swsci_gbda_sub_functions,
849 opregion->swsci_sbcb_sub_functions);
850 }
851
intel_no_opregion_vbt_callback(const struct dmi_system_id * id)852 static int intel_no_opregion_vbt_callback(const struct dmi_system_id *id)
853 {
854 DRM_DEBUG_KMS("Falling back to manually reading VBT from "
855 "VBIOS ROM for %s\n", id->ident);
856 return 1;
857 }
858
859 static const struct dmi_system_id intel_no_opregion_vbt[] = {
860 {
861 .callback = intel_no_opregion_vbt_callback,
862 .ident = "ThinkCentre A57",
863 .matches = {
864 DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
865 DMI_MATCH(DMI_PRODUCT_NAME, "97027RG"),
866 },
867 },
868 { }
869 };
870
intel_opregion_setup(struct intel_display * display)871 int intel_opregion_setup(struct intel_display *display)
872 {
873 struct intel_opregion *opregion;
874 struct pci_dev *pdev = to_pci_dev(display->drm->dev);
875 u32 asls, mboxes;
876 char buf[sizeof(OPREGION_SIGNATURE)];
877 int err = 0;
878 void *base;
879 const void *vbt;
880 u32 vbt_size;
881
882 BUILD_BUG_ON(sizeof(struct opregion_header) != 0x100);
883 BUILD_BUG_ON(sizeof(struct opregion_acpi) != 0x100);
884 BUILD_BUG_ON(sizeof(struct opregion_swsci) != 0x100);
885 BUILD_BUG_ON(sizeof(struct opregion_asle) != 0x100);
886 BUILD_BUG_ON(sizeof(struct opregion_asle_ext) != 0x400);
887
888 pci_read_config_dword(pdev, ASLS, &asls);
889 drm_dbg(display->drm, "graphic opregion physical addr: 0x%x\n",
890 asls);
891 if (asls == 0) {
892 drm_dbg(display->drm, "ACPI OpRegion not supported!\n");
893 return -ENOTSUPP;
894 }
895
896 opregion = kzalloc(sizeof(*opregion), GFP_KERNEL);
897 if (!opregion)
898 return -ENOMEM;
899
900 opregion->display = display;
901 display->opregion = opregion;
902
903 INIT_WORK(&opregion->asle_work, asle_work);
904
905 base = memremap(asls, OPREGION_SIZE, MEMREMAP_WB);
906 if (!base) {
907 err = -ENOMEM;
908 goto err_memremap;
909 }
910
911 memcpy(buf, base, sizeof(buf));
912
913 if (memcmp(buf, OPREGION_SIGNATURE, 16)) {
914 drm_dbg(display->drm, "opregion signature mismatch\n");
915 err = -EINVAL;
916 goto err_out;
917 }
918 opregion->header = base;
919
920 drm_dbg(display->drm, "ACPI OpRegion version %u.%u.%u\n",
921 opregion->header->over.major,
922 opregion->header->over.minor,
923 opregion->header->over.revision);
924
925 mboxes = opregion->header->mboxes;
926 if (mboxes & MBOX_ACPI) {
927 drm_dbg(display->drm, "Public ACPI methods supported\n");
928 opregion->acpi = base + OPREGION_ACPI_OFFSET;
929 /*
930 * Indicate we handle monitor hotplug events ourselves so we do
931 * not need ACPI notifications for them. Disabling these avoids
932 * triggering the AML code doing the notifation, which may be
933 * broken as Windows also seems to disable these.
934 */
935 opregion->acpi->chpd = 1;
936 }
937
938 if (mboxes & MBOX_SWSCI) {
939 u8 major = opregion->header->over.major;
940
941 if (major >= 3) {
942 drm_err(display->drm, "SWSCI Mailbox #2 present for opregion v3.x, ignoring\n");
943 } else {
944 if (major >= 2)
945 drm_dbg(display->drm, "SWSCI Mailbox #2 present for opregion v2.x\n");
946 drm_dbg(display->drm, "SWSCI supported\n");
947 opregion->swsci = base + OPREGION_SWSCI_OFFSET;
948 swsci_setup(display);
949 }
950 }
951
952 if (mboxes & MBOX_ASLE) {
953 drm_dbg(display->drm, "ASLE supported\n");
954 opregion->asle = base + OPREGION_ASLE_OFFSET;
955
956 opregion->asle->ardy = ASLE_ARDY_NOT_READY;
957 }
958
959 if (mboxes & MBOX_ASLE_EXT) {
960 drm_dbg(display->drm, "ASLE extension supported\n");
961 opregion->asle_ext = base + OPREGION_ASLE_EXT_OFFSET;
962 }
963
964 if (mboxes & MBOX_BACKLIGHT) {
965 drm_dbg(display->drm, "Mailbox #2 for backlight present\n");
966 }
967
968 if (dmi_check_system(intel_no_opregion_vbt))
969 goto out;
970
971 if (opregion->header->over.major >= 2 && opregion->asle &&
972 opregion->asle->rvda && opregion->asle->rvds) {
973 resource_size_t rvda = opregion->asle->rvda;
974
975 /*
976 * opregion 2.0: rvda is the physical VBT address.
977 *
978 * opregion 2.1+: rvda is unsigned, relative offset from
979 * opregion base, and should never point within opregion.
980 */
981 if (opregion->header->over.major > 2 ||
982 opregion->header->over.minor >= 1) {
983 drm_WARN_ON(display->drm, rvda < OPREGION_SIZE);
984
985 rvda += asls;
986 }
987
988 opregion->rvda = memremap(rvda, opregion->asle->rvds,
989 MEMREMAP_WB);
990
991 vbt = opregion->rvda;
992 vbt_size = opregion->asle->rvds;
993 if (intel_bios_is_valid_vbt(display, vbt, vbt_size)) {
994 drm_dbg_kms(display->drm,
995 "Found valid VBT in ACPI OpRegion (RVDA)\n");
996 opregion->vbt = vbt;
997 opregion->vbt_size = vbt_size;
998 goto out;
999 } else {
1000 drm_dbg_kms(display->drm,
1001 "Invalid VBT in ACPI OpRegion (RVDA)\n");
1002 memunmap(opregion->rvda);
1003 opregion->rvda = NULL;
1004 }
1005 }
1006
1007 vbt = base + OPREGION_VBT_OFFSET;
1008 /*
1009 * The VBT specification says that if the ASLE ext mailbox is not used
1010 * its area is reserved, but on some CHT boards the VBT extends into the
1011 * ASLE ext area. Allow this even though it is against the spec, so we
1012 * do not end up rejecting the VBT on those boards (and end up not
1013 * finding the LCD panel because of this).
1014 */
1015 vbt_size = (mboxes & MBOX_ASLE_EXT) ?
1016 OPREGION_ASLE_EXT_OFFSET : OPREGION_SIZE;
1017 vbt_size -= OPREGION_VBT_OFFSET;
1018 if (intel_bios_is_valid_vbt(display, vbt, vbt_size)) {
1019 drm_dbg_kms(display->drm,
1020 "Found valid VBT in ACPI OpRegion (Mailbox #4)\n");
1021 opregion->vbt = vbt;
1022 opregion->vbt_size = vbt_size;
1023 } else {
1024 drm_dbg_kms(display->drm,
1025 "Invalid VBT in ACPI OpRegion (Mailbox #4)\n");
1026 }
1027
1028 out:
1029 return 0;
1030
1031 err_out:
1032 memunmap(base);
1033 err_memremap:
1034 kfree(opregion);
1035 display->opregion = NULL;
1036
1037 return err;
1038 }
1039
intel_use_opregion_panel_type_callback(const struct dmi_system_id * id)1040 static int intel_use_opregion_panel_type_callback(const struct dmi_system_id *id)
1041 {
1042 DRM_INFO("Using panel type from OpRegion on %s\n", id->ident);
1043 return 1;
1044 }
1045
1046 static const struct dmi_system_id intel_use_opregion_panel_type[] = {
1047 {
1048 .callback = intel_use_opregion_panel_type_callback,
1049 .ident = "Conrac GmbH IX45GM2",
1050 .matches = {DMI_MATCH(DMI_SYS_VENDOR, "Conrac GmbH"),
1051 DMI_MATCH(DMI_PRODUCT_NAME, "IX45GM2"),
1052 },
1053 },
1054 { }
1055 };
1056
1057 int
intel_opregion_get_panel_type(struct intel_display * display)1058 intel_opregion_get_panel_type(struct intel_display *display)
1059 {
1060 u32 panel_details;
1061 int ret;
1062
1063 ret = swsci(display, SWSCI_GBDA_PANEL_DETAILS, 0x0, &panel_details);
1064 if (ret)
1065 return ret;
1066
1067 ret = (panel_details >> 8) & 0xff;
1068 if (ret > 0x10) {
1069 drm_dbg_kms(display->drm,
1070 "Invalid OpRegion panel type 0x%x\n", ret);
1071 return -EINVAL;
1072 }
1073
1074 /* fall back to VBT panel type? */
1075 if (ret == 0x0) {
1076 drm_dbg_kms(display->drm, "No panel type in OpRegion\n");
1077 return -ENODEV;
1078 }
1079
1080 /*
1081 * So far we know that some machined must use it, others must not use it.
1082 * There doesn't seem to be any way to determine which way to go, except
1083 * via a quirk list :(
1084 */
1085 if (!dmi_check_system(intel_use_opregion_panel_type)) {
1086 drm_dbg_kms(display->drm,
1087 "Ignoring OpRegion panel type (%d)\n", ret - 1);
1088 return -ENODEV;
1089 }
1090
1091 return ret - 1;
1092 }
1093
1094 /**
1095 * intel_opregion_get_edid - Fetch EDID from ACPI OpRegion mailbox #5
1096 * @connector: eDP connector
1097 *
1098 * This reads the ACPI Opregion mailbox #5 to extract the EDID that is passed
1099 * to it.
1100 *
1101 * Returns:
1102 * The EDID in the OpRegion, or NULL if there is none or it's invalid.
1103 *
1104 */
intel_opregion_get_edid(struct intel_connector * connector)1105 const struct drm_edid *intel_opregion_get_edid(struct intel_connector *connector)
1106 {
1107 struct intel_display *display = to_intel_display(connector);
1108 struct intel_opregion *opregion = display->opregion;
1109 const struct drm_edid *drm_edid;
1110 const void *edid;
1111 int len;
1112
1113 if (!opregion || !opregion->asle_ext)
1114 return NULL;
1115
1116 edid = opregion->asle_ext->bddc;
1117
1118 /* Validity corresponds to number of 128-byte blocks */
1119 len = (opregion->asle_ext->phed & ASLE_PHED_EDID_VALID_MASK) * 128;
1120 if (!len || mem_is_zero(edid, len))
1121 return NULL;
1122
1123 drm_edid = drm_edid_alloc(edid, len);
1124
1125 if (!drm_edid_valid(drm_edid)) {
1126 drm_dbg_kms(display->drm, "Invalid EDID in ACPI OpRegion (Mailbox #5)\n");
1127 drm_edid_free(drm_edid);
1128 drm_edid = NULL;
1129 }
1130
1131 return drm_edid;
1132 }
1133
intel_opregion_vbt_present(struct intel_display * display)1134 bool intel_opregion_vbt_present(struct intel_display *display)
1135 {
1136 struct intel_opregion *opregion = display->opregion;
1137
1138 if (!opregion || !opregion->vbt)
1139 return false;
1140
1141 return true;
1142 }
1143
intel_opregion_get_vbt(struct intel_display * display,size_t * size)1144 const void *intel_opregion_get_vbt(struct intel_display *display, size_t *size)
1145 {
1146 struct intel_opregion *opregion = display->opregion;
1147
1148 if (!opregion || !opregion->vbt)
1149 return NULL;
1150
1151 if (size)
1152 *size = opregion->vbt_size;
1153
1154 return kmemdup(opregion->vbt, opregion->vbt_size, GFP_KERNEL);
1155 }
1156
intel_opregion_headless_sku(struct intel_display * display)1157 bool intel_opregion_headless_sku(struct intel_display *display)
1158 {
1159 struct intel_opregion *opregion = display->opregion;
1160 struct opregion_header *header;
1161
1162 if (!opregion)
1163 return false;
1164
1165 header = opregion->header;
1166
1167 if (!header || header->over.major < 2 ||
1168 (header->over.major == 2 && header->over.minor < 3))
1169 return false;
1170
1171 return opregion->header->pcon & PCON_HEADLESS_SKU;
1172 }
1173
intel_opregion_register(struct intel_display * display)1174 void intel_opregion_register(struct intel_display *display)
1175 {
1176 struct intel_opregion *opregion = display->opregion;
1177
1178 if (!opregion)
1179 return;
1180
1181 if (opregion->acpi) {
1182 opregion->acpi_notifier.notifier_call =
1183 intel_opregion_video_event;
1184 register_acpi_notifier(&opregion->acpi_notifier);
1185 }
1186
1187 intel_opregion_resume(display);
1188 }
1189
intel_opregion_resume_display(struct intel_display * display)1190 static void intel_opregion_resume_display(struct intel_display *display)
1191 {
1192 struct intel_opregion *opregion = display->opregion;
1193
1194 if (opregion->acpi) {
1195 intel_didl_outputs(display);
1196 intel_setup_cadls(display);
1197
1198 /*
1199 * Notify BIOS we are ready to handle ACPI video ext notifs.
1200 * Right now, all the events are handled by the ACPI video
1201 * module. We don't actually need to do anything with them.
1202 */
1203 opregion->acpi->csts = 0;
1204 opregion->acpi->drdy = 1;
1205 }
1206
1207 if (opregion->asle) {
1208 opregion->asle->tche = ASLE_TCHE_BLC_EN;
1209 opregion->asle->ardy = ASLE_ARDY_READY;
1210 }
1211
1212 /* Some platforms abuse the _DSM to enable MUX */
1213 intel_dsm_get_bios_data_funcs_supported(display);
1214 }
1215
intel_opregion_resume(struct intel_display * display)1216 void intel_opregion_resume(struct intel_display *display)
1217 {
1218 struct intel_opregion *opregion = display->opregion;
1219
1220 if (!opregion)
1221 return;
1222
1223 if (HAS_DISPLAY(display))
1224 intel_opregion_resume_display(display);
1225
1226 intel_opregion_notify_adapter(display, PCI_D0);
1227 }
1228
intel_opregion_suspend_display(struct intel_display * display)1229 static void intel_opregion_suspend_display(struct intel_display *display)
1230 {
1231 struct intel_opregion *opregion = display->opregion;
1232
1233 if (opregion->asle)
1234 opregion->asle->ardy = ASLE_ARDY_NOT_READY;
1235
1236 cancel_work_sync(&opregion->asle_work);
1237
1238 if (opregion->acpi)
1239 opregion->acpi->drdy = 0;
1240 }
1241
intel_opregion_suspend(struct intel_display * display,pci_power_t state)1242 void intel_opregion_suspend(struct intel_display *display, pci_power_t state)
1243 {
1244 struct intel_opregion *opregion = display->opregion;
1245
1246 if (!opregion)
1247 return;
1248
1249 intel_opregion_notify_adapter(display, state);
1250
1251 if (HAS_DISPLAY(display))
1252 intel_opregion_suspend_display(display);
1253 }
1254
intel_opregion_unregister(struct intel_display * display)1255 void intel_opregion_unregister(struct intel_display *display)
1256 {
1257 struct intel_opregion *opregion = display->opregion;
1258
1259 intel_opregion_suspend(display, PCI_D1);
1260
1261 if (!opregion)
1262 return;
1263
1264 if (opregion->acpi_notifier.notifier_call) {
1265 unregister_acpi_notifier(&opregion->acpi_notifier);
1266 opregion->acpi_notifier.notifier_call = NULL;
1267 }
1268 }
1269
intel_opregion_cleanup(struct intel_display * display)1270 void intel_opregion_cleanup(struct intel_display *display)
1271 {
1272 struct intel_opregion *opregion = display->opregion;
1273
1274 if (!opregion)
1275 return;
1276
1277 memunmap(opregion->header);
1278 if (opregion->rvda)
1279 memunmap(opregion->rvda);
1280 kfree(opregion);
1281 display->opregion = NULL;
1282 }
1283
intel_opregion_show(struct seq_file * m,void * unused)1284 static int intel_opregion_show(struct seq_file *m, void *unused)
1285 {
1286 struct intel_display *display = m->private;
1287 struct intel_opregion *opregion = display->opregion;
1288
1289 if (opregion)
1290 seq_write(m, opregion->header, OPREGION_SIZE);
1291
1292 return 0;
1293 }
1294
1295 DEFINE_SHOW_ATTRIBUTE(intel_opregion);
1296
intel_opregion_debugfs_register(struct intel_display * display)1297 void intel_opregion_debugfs_register(struct intel_display *display)
1298 {
1299 struct drm_minor *minor = display->drm->primary;
1300
1301 debugfs_create_file("i915_opregion", 0444, minor->debugfs_root,
1302 display, &intel_opregion_fops);
1303 }
1304