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/debugfs.h>
30 #include <linux/dmi.h>
31 #include <acpi/video.h>
32
33 #include <drm/drm_edid.h>
34
35 #include "i915_drv.h"
36 #include "intel_acpi.h"
37 #include "intel_backlight.h"
38 #include "intel_display_types.h"
39 #include "intel_opregion.h"
40 #include "intel_pci_config.h"
41
42 #define OPREGION_HEADER_OFFSET 0
43 #define OPREGION_ACPI_OFFSET 0x100
44 #define ACPI_CLID 0x01ac /* current lid state indicator */
45 #define ACPI_CDCK 0x01b0 /* current docking state indicator */
46 #define OPREGION_SWSCI_OFFSET 0x200
47 #define OPREGION_ASLE_OFFSET 0x300
48 #define OPREGION_VBT_OFFSET 0x400
49 #define OPREGION_ASLE_EXT_OFFSET 0x1C00
50
51 #define OPREGION_SIGNATURE "IntelGraphicsMem"
52 #define MBOX_ACPI BIT(0) /* Mailbox #1 */
53 #define MBOX_SWSCI BIT(1) /* Mailbox #2 (obsolete from v2.x) */
54 #define MBOX_ASLE BIT(2) /* Mailbox #3 */
55 #define MBOX_ASLE_EXT BIT(4) /* Mailbox #5 */
56 #define MBOX_BACKLIGHT BIT(5) /* Mailbox #2 (valid from v3.x) */
57
58 #define PCON_HEADLESS_SKU BIT(13)
59
60 struct opregion_header {
61 u8 signature[16];
62 u32 size;
63 struct {
64 u8 rsvd;
65 u8 revision;
66 u8 minor;
67 u8 major;
68 } __packed over;
69 u8 bios_ver[32];
70 u8 vbios_ver[16];
71 u8 driver_ver[16];
72 u32 mboxes;
73 u32 driver_model;
74 u32 pcon;
75 u8 dver[32];
76 u8 rsvd[124];
77 } __packed;
78
79 /* OpRegion mailbox #1: public ACPI methods */
80 struct opregion_acpi {
81 u32 drdy; /* driver readiness */
82 u32 csts; /* notification status */
83 u32 cevt; /* current event */
84 u8 rsvd1[20];
85 u32 didl[8]; /* supported display devices ID list */
86 u32 cpdl[8]; /* currently presented display list */
87 u32 cadl[8]; /* currently active display list */
88 u32 nadl[8]; /* next active devices list */
89 u32 aslp; /* ASL sleep time-out */
90 u32 tidx; /* toggle table index */
91 u32 chpd; /* current hotplug enable indicator */
92 u32 clid; /* current lid state*/
93 u32 cdck; /* current docking state */
94 u32 sxsw; /* Sx state resume */
95 u32 evts; /* ASL supported events */
96 u32 cnot; /* current OS notification */
97 u32 nrdy; /* driver status */
98 u32 did2[7]; /* extended supported display devices ID list */
99 u32 cpd2[7]; /* extended attached display devices list */
100 u8 rsvd2[4];
101 } __packed;
102
103 /* OpRegion mailbox #2: SWSCI */
104 struct opregion_swsci {
105 u32 scic; /* SWSCI command|status|data */
106 u32 parm; /* command parameters */
107 u32 dslp; /* driver sleep time-out */
108 u8 rsvd[244];
109 } __packed;
110
111 /* OpRegion mailbox #3: ASLE */
112 struct opregion_asle {
113 u32 ardy; /* driver readiness */
114 u32 aslc; /* ASLE interrupt command */
115 u32 tche; /* technology enabled indicator */
116 u32 alsi; /* current ALS illuminance reading */
117 u32 bclp; /* backlight brightness to set */
118 u32 pfit; /* panel fitting state */
119 u32 cblv; /* current brightness level */
120 u16 bclm[20]; /* backlight level duty cycle mapping table */
121 u32 cpfm; /* current panel fitting mode */
122 u32 epfm; /* enabled panel fitting modes */
123 u8 plut[74]; /* panel LUT and identifier */
124 u32 pfmb; /* PWM freq and min brightness */
125 u32 cddv; /* color correction default values */
126 u32 pcft; /* power conservation features */
127 u32 srot; /* supported rotation angles */
128 u32 iuer; /* IUER events */
129 u64 fdss;
130 u32 fdsp;
131 u32 stat;
132 u64 rvda; /* Physical (2.0) or relative from opregion (2.1+)
133 * address of raw VBT data. */
134 u32 rvds; /* Size of raw vbt data */
135 u8 rsvd[58];
136 } __packed;
137
138 /* OpRegion mailbox #5: ASLE ext */
139 struct opregion_asle_ext {
140 u32 phed; /* Panel Header */
141 u8 bddc[256]; /* Panel EDID */
142 u8 rsvd[764];
143 } __packed;
144
145 /* Driver readiness indicator */
146 #define ASLE_ARDY_READY (1 << 0)
147 #define ASLE_ARDY_NOT_READY (0 << 0)
148
149 /* ASLE Interrupt Command (ASLC) bits */
150 #define ASLC_SET_ALS_ILLUM (1 << 0)
151 #define ASLC_SET_BACKLIGHT (1 << 1)
152 #define ASLC_SET_PFIT (1 << 2)
153 #define ASLC_SET_PWM_FREQ (1 << 3)
154 #define ASLC_SUPPORTED_ROTATION_ANGLES (1 << 4)
155 #define ASLC_BUTTON_ARRAY (1 << 5)
156 #define ASLC_CONVERTIBLE_INDICATOR (1 << 6)
157 #define ASLC_DOCKING_INDICATOR (1 << 7)
158 #define ASLC_ISCT_STATE_CHANGE (1 << 8)
159 #define ASLC_REQ_MSK 0x1ff
160 /* response bits */
161 #define ASLC_ALS_ILLUM_FAILED (1 << 10)
162 #define ASLC_BACKLIGHT_FAILED (1 << 12)
163 #define ASLC_PFIT_FAILED (1 << 14)
164 #define ASLC_PWM_FREQ_FAILED (1 << 16)
165 #define ASLC_ROTATION_ANGLES_FAILED (1 << 18)
166 #define ASLC_BUTTON_ARRAY_FAILED (1 << 20)
167 #define ASLC_CONVERTIBLE_FAILED (1 << 22)
168 #define ASLC_DOCKING_FAILED (1 << 24)
169 #define ASLC_ISCT_STATE_FAILED (1 << 26)
170
171 /* Technology enabled indicator */
172 #define ASLE_TCHE_ALS_EN (1 << 0)
173 #define ASLE_TCHE_BLC_EN (1 << 1)
174 #define ASLE_TCHE_PFIT_EN (1 << 2)
175 #define ASLE_TCHE_PFMB_EN (1 << 3)
176
177 /* ASLE backlight brightness to set */
178 #define ASLE_BCLP_VALID (1<<31)
179 #define ASLE_BCLP_MSK (~(1<<31))
180
181 /* ASLE panel fitting request */
182 #define ASLE_PFIT_VALID (1<<31)
183 #define ASLE_PFIT_CENTER (1<<0)
184 #define ASLE_PFIT_STRETCH_TEXT (1<<1)
185 #define ASLE_PFIT_STRETCH_GFX (1<<2)
186
187 /* PWM frequency and minimum brightness */
188 #define ASLE_PFMB_BRIGHTNESS_MASK (0xff)
189 #define ASLE_PFMB_BRIGHTNESS_VALID (1<<8)
190 #define ASLE_PFMB_PWM_MASK (0x7ffffe00)
191 #define ASLE_PFMB_PWM_VALID (1<<31)
192
193 #define ASLE_CBLV_VALID (1<<31)
194
195 /* IUER */
196 #define ASLE_IUER_DOCKING (1 << 7)
197 #define ASLE_IUER_CONVERTIBLE (1 << 6)
198 #define ASLE_IUER_ROTATION_LOCK_BTN (1 << 4)
199 #define ASLE_IUER_VOLUME_DOWN_BTN (1 << 3)
200 #define ASLE_IUER_VOLUME_UP_BTN (1 << 2)
201 #define ASLE_IUER_WINDOWS_BTN (1 << 1)
202 #define ASLE_IUER_POWER_BTN (1 << 0)
203
204 #define ASLE_PHED_EDID_VALID_MASK 0x3
205
206 /* Software System Control Interrupt (SWSCI) */
207 #define SWSCI_SCIC_INDICATOR (1 << 0)
208 #define SWSCI_SCIC_MAIN_FUNCTION_SHIFT 1
209 #define SWSCI_SCIC_MAIN_FUNCTION_MASK (0xf << 1)
210 #define SWSCI_SCIC_SUB_FUNCTION_SHIFT 8
211 #define SWSCI_SCIC_SUB_FUNCTION_MASK (0xff << 8)
212 #define SWSCI_SCIC_EXIT_PARAMETER_SHIFT 8
213 #define SWSCI_SCIC_EXIT_PARAMETER_MASK (0xff << 8)
214 #define SWSCI_SCIC_EXIT_STATUS_SHIFT 5
215 #define SWSCI_SCIC_EXIT_STATUS_MASK (7 << 5)
216 #define SWSCI_SCIC_EXIT_STATUS_SUCCESS 1
217
218 #define SWSCI_FUNCTION_CODE(main, sub) \
219 ((main) << SWSCI_SCIC_MAIN_FUNCTION_SHIFT | \
220 (sub) << SWSCI_SCIC_SUB_FUNCTION_SHIFT)
221
222 /* SWSCI: Get BIOS Data (GBDA) */
223 #define SWSCI_GBDA 4
224 #define SWSCI_GBDA_SUPPORTED_CALLS SWSCI_FUNCTION_CODE(SWSCI_GBDA, 0)
225 #define SWSCI_GBDA_REQUESTED_CALLBACKS SWSCI_FUNCTION_CODE(SWSCI_GBDA, 1)
226 #define SWSCI_GBDA_BOOT_DISPLAY_PREF SWSCI_FUNCTION_CODE(SWSCI_GBDA, 4)
227 #define SWSCI_GBDA_PANEL_DETAILS SWSCI_FUNCTION_CODE(SWSCI_GBDA, 5)
228 #define SWSCI_GBDA_TV_STANDARD SWSCI_FUNCTION_CODE(SWSCI_GBDA, 6)
229 #define SWSCI_GBDA_INTERNAL_GRAPHICS SWSCI_FUNCTION_CODE(SWSCI_GBDA, 7)
230 #define SWSCI_GBDA_SPREAD_SPECTRUM SWSCI_FUNCTION_CODE(SWSCI_GBDA, 10)
231
232 /* SWSCI: System BIOS Callbacks (SBCB) */
233 #define SWSCI_SBCB 6
234 #define SWSCI_SBCB_SUPPORTED_CALLBACKS SWSCI_FUNCTION_CODE(SWSCI_SBCB, 0)
235 #define SWSCI_SBCB_INIT_COMPLETION SWSCI_FUNCTION_CODE(SWSCI_SBCB, 1)
236 #define SWSCI_SBCB_PRE_HIRES_SET_MODE SWSCI_FUNCTION_CODE(SWSCI_SBCB, 3)
237 #define SWSCI_SBCB_POST_HIRES_SET_MODE SWSCI_FUNCTION_CODE(SWSCI_SBCB, 4)
238 #define SWSCI_SBCB_DISPLAY_SWITCH SWSCI_FUNCTION_CODE(SWSCI_SBCB, 5)
239 #define SWSCI_SBCB_SET_TV_FORMAT SWSCI_FUNCTION_CODE(SWSCI_SBCB, 6)
240 #define SWSCI_SBCB_ADAPTER_POWER_STATE SWSCI_FUNCTION_CODE(SWSCI_SBCB, 7)
241 #define SWSCI_SBCB_DISPLAY_POWER_STATE SWSCI_FUNCTION_CODE(SWSCI_SBCB, 8)
242 #define SWSCI_SBCB_SET_BOOT_DISPLAY SWSCI_FUNCTION_CODE(SWSCI_SBCB, 9)
243 #define SWSCI_SBCB_SET_PANEL_DETAILS SWSCI_FUNCTION_CODE(SWSCI_SBCB, 10)
244 #define SWSCI_SBCB_SET_INTERNAL_GFX SWSCI_FUNCTION_CODE(SWSCI_SBCB, 11)
245 #define SWSCI_SBCB_POST_HIRES_TO_DOS_FS SWSCI_FUNCTION_CODE(SWSCI_SBCB, 16)
246 #define SWSCI_SBCB_SUSPEND_RESUME SWSCI_FUNCTION_CODE(SWSCI_SBCB, 17)
247 #define SWSCI_SBCB_SET_SPREAD_SPECTRUM SWSCI_FUNCTION_CODE(SWSCI_SBCB, 18)
248 #define SWSCI_SBCB_POST_VBE_PM SWSCI_FUNCTION_CODE(SWSCI_SBCB, 19)
249 #define SWSCI_SBCB_ENABLE_DISABLE_AUDIO SWSCI_FUNCTION_CODE(SWSCI_SBCB, 21)
250
251 #define MAX_DSLP 1500
252
253 #define OPREGION_SIZE (8 * 1024)
254
255 struct intel_opregion {
256 struct intel_display *display;
257
258 struct opregion_header *header;
259 struct opregion_acpi *acpi;
260 struct opregion_swsci *swsci;
261 u32 swsci_gbda_sub_functions;
262 u32 swsci_sbcb_sub_functions;
263 struct opregion_asle *asle;
264 struct opregion_asle_ext *asle_ext;
265 void *rvda;
266 const void *vbt;
267 u32 vbt_size;
268 struct work_struct asle_work;
269 struct notifier_block acpi_notifier;
270 };
271
check_swsci_function(struct intel_display * display,u32 function)272 static int check_swsci_function(struct intel_display *display, u32 function)
273 {
274 struct intel_opregion *opregion = display->opregion;
275 struct opregion_swsci *swsci;
276 u32 main_function, sub_function;
277
278 if (!opregion)
279 return -ENODEV;
280
281 swsci = opregion->swsci;
282 if (!swsci)
283 return -ENODEV;
284
285 main_function = (function & SWSCI_SCIC_MAIN_FUNCTION_MASK) >>
286 SWSCI_SCIC_MAIN_FUNCTION_SHIFT;
287 sub_function = (function & SWSCI_SCIC_SUB_FUNCTION_MASK) >>
288 SWSCI_SCIC_SUB_FUNCTION_SHIFT;
289
290 /* Check if we can call the function. See swsci_setup for details. */
291 if (main_function == SWSCI_SBCB) {
292 if ((opregion->swsci_sbcb_sub_functions &
293 (1 << sub_function)) == 0)
294 return -EINVAL;
295 } else if (main_function == SWSCI_GBDA) {
296 if ((opregion->swsci_gbda_sub_functions &
297 (1 << sub_function)) == 0)
298 return -EINVAL;
299 }
300
301 return 0;
302 }
303
swsci(struct intel_display * display,u32 function,u32 parm,u32 * parm_out)304 static int swsci(struct intel_display *display,
305 u32 function, u32 parm, u32 *parm_out)
306 {
307 struct opregion_swsci *swsci;
308 struct pci_dev *pdev = to_pci_dev(display->drm->dev);
309 u32 scic, dslp;
310 u16 swsci_val;
311 int ret;
312
313 ret = check_swsci_function(display, function);
314 if (ret)
315 return ret;
316
317 swsci = display->opregion->swsci;
318
319 /* Driver sleep timeout in ms. */
320 dslp = swsci->dslp;
321 if (!dslp) {
322 /* The spec says 2ms should be the default, but it's too small
323 * for some machines. */
324 dslp = 50;
325 } else if (dslp > MAX_DSLP) {
326 /* Hey bios, trust must be earned. */
327 DRM_INFO_ONCE("ACPI BIOS requests an excessive sleep of %u ms, "
328 "using %u ms instead\n", dslp, MAX_DSLP);
329 dslp = MAX_DSLP;
330 }
331
332 /* The spec tells us to do this, but we are the only user... */
333 scic = swsci->scic;
334 if (scic & SWSCI_SCIC_INDICATOR) {
335 drm_dbg(display->drm, "SWSCI request already in progress\n");
336 return -EBUSY;
337 }
338
339 scic = function | SWSCI_SCIC_INDICATOR;
340
341 swsci->parm = parm;
342 swsci->scic = scic;
343
344 /* Ensure SCI event is selected and event trigger is cleared. */
345 pci_read_config_word(pdev, SWSCI, &swsci_val);
346 if (!(swsci_val & SWSCI_SCISEL) || (swsci_val & SWSCI_GSSCIE)) {
347 swsci_val |= SWSCI_SCISEL;
348 swsci_val &= ~SWSCI_GSSCIE;
349 pci_write_config_word(pdev, SWSCI, swsci_val);
350 }
351
352 /* Use event trigger to tell bios to check the mail. */
353 swsci_val |= SWSCI_GSSCIE;
354 pci_write_config_word(pdev, SWSCI, swsci_val);
355
356 /* Poll for the result. */
357 #define C (((scic = swsci->scic) & SWSCI_SCIC_INDICATOR) == 0)
358 if (wait_for(C, dslp)) {
359 drm_dbg(display->drm, "SWSCI request timed out\n");
360 return -ETIMEDOUT;
361 }
362
363 scic = (scic & SWSCI_SCIC_EXIT_STATUS_MASK) >>
364 SWSCI_SCIC_EXIT_STATUS_SHIFT;
365
366 /* Note: scic == 0 is an error! */
367 if (scic != SWSCI_SCIC_EXIT_STATUS_SUCCESS) {
368 drm_dbg(display->drm, "SWSCI request error %u\n", scic);
369 return -EIO;
370 }
371
372 if (parm_out)
373 *parm_out = swsci->parm;
374
375 return 0;
376
377 #undef C
378 }
379
380 #define DISPLAY_TYPE_CRT 0
381 #define DISPLAY_TYPE_TV 1
382 #define DISPLAY_TYPE_EXTERNAL_FLAT_PANEL 2
383 #define DISPLAY_TYPE_INTERNAL_FLAT_PANEL 3
384
intel_opregion_notify_encoder(struct intel_encoder * encoder,bool enable)385 int intel_opregion_notify_encoder(struct intel_encoder *encoder,
386 bool enable)
387 {
388 struct intel_display *display = to_intel_display(encoder);
389 u32 parm = 0;
390 u32 type = 0;
391 u32 port;
392 int ret;
393
394 /* don't care about old stuff for now */
395 if (!HAS_DDI(display))
396 return 0;
397
398 /* Avoid port out of bounds checks if SWSCI isn't there. */
399 ret = check_swsci_function(display, SWSCI_SBCB_DISPLAY_POWER_STATE);
400 if (ret)
401 return ret;
402
403 if (encoder->type == INTEL_OUTPUT_DSI)
404 port = 0;
405 else
406 port = encoder->port;
407
408 if (port == PORT_E) {
409 port = 0;
410 } else {
411 parm |= 1 << port;
412 port++;
413 }
414
415 /*
416 * The port numbering and mapping here is bizarre. The now-obsolete
417 * swsci spec supports ports numbered [0..4]. Port E is handled as a
418 * special case, but port F and beyond are not. The functionality is
419 * supposed to be obsolete for new platforms. Just bail out if the port
420 * number is out of bounds after mapping.
421 */
422 if (port > 4) {
423 drm_dbg_kms(display->drm,
424 "[ENCODER:%d:%s] port %c (index %u) out of bounds for display power state notification\n",
425 encoder->base.base.id, encoder->base.name,
426 port_name(encoder->port), port);
427 return -EINVAL;
428 }
429
430 if (!enable)
431 parm |= 4 << 8;
432
433 switch (encoder->type) {
434 case INTEL_OUTPUT_ANALOG:
435 type = DISPLAY_TYPE_CRT;
436 break;
437 case INTEL_OUTPUT_DDI:
438 case INTEL_OUTPUT_DP:
439 case INTEL_OUTPUT_HDMI:
440 case INTEL_OUTPUT_DP_MST:
441 type = DISPLAY_TYPE_EXTERNAL_FLAT_PANEL;
442 break;
443 case INTEL_OUTPUT_EDP:
444 case INTEL_OUTPUT_DSI:
445 type = DISPLAY_TYPE_INTERNAL_FLAT_PANEL;
446 break;
447 default:
448 drm_WARN_ONCE(display->drm, 1,
449 "unsupported intel_encoder type %d\n",
450 encoder->type);
451 return -EINVAL;
452 }
453
454 parm |= type << (16 + port * 3);
455
456 return swsci(display, SWSCI_SBCB_DISPLAY_POWER_STATE, parm, NULL);
457 }
458
459 static const struct {
460 pci_power_t pci_power_state;
461 u32 parm;
462 } power_state_map[] = {
463 { PCI_D0, 0x00 },
464 { PCI_D1, 0x01 },
465 { PCI_D2, 0x02 },
466 { PCI_D3hot, 0x04 },
467 { PCI_D3cold, 0x04 },
468 };
469
intel_opregion_notify_adapter(struct intel_display * display,pci_power_t state)470 int intel_opregion_notify_adapter(struct intel_display *display,
471 pci_power_t state)
472 {
473 int i;
474
475 if (!HAS_DDI(display))
476 return 0;
477
478 for (i = 0; i < ARRAY_SIZE(power_state_map); i++) {
479 if (state == power_state_map[i].pci_power_state)
480 return swsci(display, SWSCI_SBCB_ADAPTER_POWER_STATE,
481 power_state_map[i].parm, NULL);
482 }
483
484 return -EINVAL;
485 }
486
asle_set_backlight(struct intel_display * display,u32 bclp)487 static u32 asle_set_backlight(struct intel_display *display, u32 bclp)
488 {
489 struct intel_connector *connector;
490 struct drm_connector_list_iter conn_iter;
491 struct opregion_asle *asle = display->opregion->asle;
492
493 drm_dbg(display->drm, "bclp = 0x%08x\n", bclp);
494
495 if (acpi_video_get_backlight_type() == acpi_backlight_native) {
496 drm_dbg_kms(display->drm,
497 "opregion backlight request ignored\n");
498 return 0;
499 }
500
501 if (!(bclp & ASLE_BCLP_VALID))
502 return ASLC_BACKLIGHT_FAILED;
503
504 bclp &= ASLE_BCLP_MSK;
505 if (bclp > 255)
506 return ASLC_BACKLIGHT_FAILED;
507
508 drm_modeset_lock(&display->drm->mode_config.connection_mutex, NULL);
509
510 /*
511 * Update backlight on all connectors that support backlight (usually
512 * only one).
513 */
514 drm_dbg_kms(display->drm, "updating opregion backlight %d/255\n",
515 bclp);
516 drm_connector_list_iter_begin(display->drm, &conn_iter);
517 for_each_intel_connector_iter(connector, &conn_iter)
518 intel_backlight_set_acpi(connector->base.state, bclp, 255);
519 drm_connector_list_iter_end(&conn_iter);
520 asle->cblv = DIV_ROUND_UP(bclp * 100, 255) | ASLE_CBLV_VALID;
521
522 drm_modeset_unlock(&display->drm->mode_config.connection_mutex);
523
524
525 return 0;
526 }
527
asle_set_als_illum(struct intel_display * display,u32 alsi)528 static u32 asle_set_als_illum(struct intel_display *display, u32 alsi)
529 {
530 /* alsi is the current ALS reading in lux. 0 indicates below sensor
531 range, 0xffff indicates above sensor range. 1-0xfffe are valid */
532 drm_dbg(display->drm, "Illum is not supported\n");
533 return ASLC_ALS_ILLUM_FAILED;
534 }
535
asle_set_pwm_freq(struct intel_display * display,u32 pfmb)536 static u32 asle_set_pwm_freq(struct intel_display *display, u32 pfmb)
537 {
538 drm_dbg(display->drm, "PWM freq is not supported\n");
539 return ASLC_PWM_FREQ_FAILED;
540 }
541
asle_set_pfit(struct intel_display * display,u32 pfit)542 static u32 asle_set_pfit(struct intel_display *display, u32 pfit)
543 {
544 /* Panel fitting is currently controlled by the X code, so this is a
545 noop until modesetting support works fully */
546 drm_dbg(display->drm, "Pfit is not supported\n");
547 return ASLC_PFIT_FAILED;
548 }
549
asle_set_supported_rotation_angles(struct intel_display * display,u32 srot)550 static u32 asle_set_supported_rotation_angles(struct intel_display *display, u32 srot)
551 {
552 drm_dbg(display->drm, "SROT is not supported\n");
553 return ASLC_ROTATION_ANGLES_FAILED;
554 }
555
asle_set_button_array(struct intel_display * display,u32 iuer)556 static u32 asle_set_button_array(struct intel_display *display, u32 iuer)
557 {
558 if (!iuer)
559 drm_dbg(display->drm,
560 "Button array event is not supported (nothing)\n");
561 if (iuer & ASLE_IUER_ROTATION_LOCK_BTN)
562 drm_dbg(display->drm,
563 "Button array event is not supported (rotation lock)\n");
564 if (iuer & ASLE_IUER_VOLUME_DOWN_BTN)
565 drm_dbg(display->drm,
566 "Button array event is not supported (volume down)\n");
567 if (iuer & ASLE_IUER_VOLUME_UP_BTN)
568 drm_dbg(display->drm,
569 "Button array event is not supported (volume up)\n");
570 if (iuer & ASLE_IUER_WINDOWS_BTN)
571 drm_dbg(display->drm,
572 "Button array event is not supported (windows)\n");
573 if (iuer & ASLE_IUER_POWER_BTN)
574 drm_dbg(display->drm,
575 "Button array event is not supported (power)\n");
576
577 return ASLC_BUTTON_ARRAY_FAILED;
578 }
579
asle_set_convertible(struct intel_display * display,u32 iuer)580 static u32 asle_set_convertible(struct intel_display *display, u32 iuer)
581 {
582 if (iuer & ASLE_IUER_CONVERTIBLE)
583 drm_dbg(display->drm,
584 "Convertible is not supported (clamshell)\n");
585 else
586 drm_dbg(display->drm,
587 "Convertible is not supported (slate)\n");
588
589 return ASLC_CONVERTIBLE_FAILED;
590 }
591
asle_set_docking(struct intel_display * display,u32 iuer)592 static u32 asle_set_docking(struct intel_display *display, u32 iuer)
593 {
594 if (iuer & ASLE_IUER_DOCKING)
595 drm_dbg(display->drm, "Docking is not supported (docked)\n");
596 else
597 drm_dbg(display->drm,
598 "Docking is not supported (undocked)\n");
599
600 return ASLC_DOCKING_FAILED;
601 }
602
asle_isct_state(struct intel_display * display)603 static u32 asle_isct_state(struct intel_display *display)
604 {
605 drm_dbg(display->drm, "ISCT is not supported\n");
606 return ASLC_ISCT_STATE_FAILED;
607 }
608
asle_work(struct work_struct * work)609 static void asle_work(struct work_struct *work)
610 {
611 struct intel_opregion *opregion =
612 container_of(work, struct intel_opregion, asle_work);
613 struct intel_display *display = opregion->display;
614 struct opregion_asle *asle = opregion->asle;
615 u32 aslc_stat = 0;
616 u32 aslc_req;
617
618 if (!asle)
619 return;
620
621 aslc_req = asle->aslc;
622
623 if (!(aslc_req & ASLC_REQ_MSK)) {
624 drm_dbg(display->drm,
625 "No request on ASLC interrupt 0x%08x\n", aslc_req);
626 return;
627 }
628
629 if (aslc_req & ASLC_SET_ALS_ILLUM)
630 aslc_stat |= asle_set_als_illum(display, asle->alsi);
631
632 if (aslc_req & ASLC_SET_BACKLIGHT)
633 aslc_stat |= asle_set_backlight(display, asle->bclp);
634
635 if (aslc_req & ASLC_SET_PFIT)
636 aslc_stat |= asle_set_pfit(display, asle->pfit);
637
638 if (aslc_req & ASLC_SET_PWM_FREQ)
639 aslc_stat |= asle_set_pwm_freq(display, asle->pfmb);
640
641 if (aslc_req & ASLC_SUPPORTED_ROTATION_ANGLES)
642 aslc_stat |= asle_set_supported_rotation_angles(display,
643 asle->srot);
644
645 if (aslc_req & ASLC_BUTTON_ARRAY)
646 aslc_stat |= asle_set_button_array(display, asle->iuer);
647
648 if (aslc_req & ASLC_CONVERTIBLE_INDICATOR)
649 aslc_stat |= asle_set_convertible(display, asle->iuer);
650
651 if (aslc_req & ASLC_DOCKING_INDICATOR)
652 aslc_stat |= asle_set_docking(display, asle->iuer);
653
654 if (aslc_req & ASLC_ISCT_STATE_CHANGE)
655 aslc_stat |= asle_isct_state(display);
656
657 asle->aslc = aslc_stat;
658 }
659
intel_opregion_asle_present(struct intel_display * display)660 bool intel_opregion_asle_present(struct intel_display *display)
661 {
662 return display->opregion && display->opregion->asle;
663 }
664
intel_opregion_asle_intr(struct intel_display * display)665 void intel_opregion_asle_intr(struct intel_display *display)
666 {
667 struct drm_i915_private *i915 = to_i915(display->drm);
668 struct intel_opregion *opregion = display->opregion;
669
670 if (opregion && opregion->asle)
671 queue_work(i915->unordered_wq, &opregion->asle_work);
672 }
673
674 #define ACPI_EV_DISPLAY_SWITCH (1<<0)
675 #define ACPI_EV_LID (1<<1)
676 #define ACPI_EV_DOCK (1<<2)
677
678 /*
679 * The only video events relevant to opregion are 0x80. These indicate either a
680 * docking event, lid switch or display switch request. In Linux, these are
681 * handled by the dock, button and video drivers.
682 */
intel_opregion_video_event(struct notifier_block * nb,unsigned long val,void * data)683 static int intel_opregion_video_event(struct notifier_block *nb,
684 unsigned long val, void *data)
685 {
686 struct intel_opregion *opregion = container_of(nb, struct intel_opregion,
687 acpi_notifier);
688 struct acpi_bus_event *event = data;
689 struct opregion_acpi *acpi;
690 int ret = NOTIFY_OK;
691
692 if (strcmp(event->device_class, ACPI_VIDEO_CLASS) != 0)
693 return NOTIFY_DONE;
694
695 acpi = opregion->acpi;
696
697 if (event->type == 0x80 && ((acpi->cevt & 1) == 0))
698 ret = NOTIFY_BAD;
699
700 acpi->csts = 0;
701
702 return ret;
703 }
704
705 /*
706 * Initialise the DIDL field in opregion. This passes a list of devices to
707 * the firmware. Values are defined by section B.4.2 of the ACPI specification
708 * (version 3)
709 */
710
set_did(struct intel_opregion * opregion,int i,u32 val)711 static void set_did(struct intel_opregion *opregion, int i, u32 val)
712 {
713 if (i < ARRAY_SIZE(opregion->acpi->didl)) {
714 opregion->acpi->didl[i] = val;
715 } else {
716 i -= ARRAY_SIZE(opregion->acpi->didl);
717
718 if (WARN_ON(i >= ARRAY_SIZE(opregion->acpi->did2)))
719 return;
720
721 opregion->acpi->did2[i] = val;
722 }
723 }
724
intel_didl_outputs(struct intel_display * display)725 static void intel_didl_outputs(struct intel_display *display)
726 {
727 struct intel_opregion *opregion = display->opregion;
728 struct intel_connector *connector;
729 struct drm_connector_list_iter conn_iter;
730 int i = 0, max_outputs;
731
732 /*
733 * In theory, did2, the extended didl, gets added at opregion version
734 * 3.0. In practice, however, we're supposed to set it for earlier
735 * versions as well, since a BIOS that doesn't understand did2 should
736 * not look at it anyway. Use a variable so we can tweak this if a need
737 * arises later.
738 */
739 max_outputs = ARRAY_SIZE(opregion->acpi->didl) +
740 ARRAY_SIZE(opregion->acpi->did2);
741
742 intel_acpi_device_id_update(display);
743
744 drm_connector_list_iter_begin(display->drm, &conn_iter);
745 for_each_intel_connector_iter(connector, &conn_iter) {
746 if (i < max_outputs)
747 set_did(opregion, i, connector->acpi_device_id);
748 i++;
749 }
750 drm_connector_list_iter_end(&conn_iter);
751
752 drm_dbg_kms(display->drm, "%d outputs detected\n", i);
753
754 if (i > max_outputs)
755 drm_err(display->drm,
756 "More than %d outputs in connector list\n",
757 max_outputs);
758
759 /* If fewer than max outputs, the list must be null terminated */
760 if (i < max_outputs)
761 set_did(opregion, i, 0);
762 }
763
intel_setup_cadls(struct intel_display * display)764 static void intel_setup_cadls(struct intel_display *display)
765 {
766 struct intel_opregion *opregion = display->opregion;
767 struct intel_connector *connector;
768 struct drm_connector_list_iter conn_iter;
769 int i = 0;
770
771 /*
772 * Initialize the CADL field from the connector device ids. This is
773 * essentially the same as copying from the DIDL. Technically, this is
774 * not always correct as display outputs may exist, but not active. This
775 * initialization is necessary for some Clevo laptops that check this
776 * field before processing the brightness and display switching hotkeys.
777 *
778 * Note that internal panels should be at the front of the connector
779 * list already, ensuring they're not left out.
780 */
781 drm_connector_list_iter_begin(display->drm, &conn_iter);
782 for_each_intel_connector_iter(connector, &conn_iter) {
783 if (i >= ARRAY_SIZE(opregion->acpi->cadl))
784 break;
785 opregion->acpi->cadl[i++] = connector->acpi_device_id;
786 }
787 drm_connector_list_iter_end(&conn_iter);
788
789 /* If fewer than 8 active devices, the list must be null terminated */
790 if (i < ARRAY_SIZE(opregion->acpi->cadl))
791 opregion->acpi->cadl[i] = 0;
792 }
793
swsci_setup(struct intel_display * display)794 static void swsci_setup(struct intel_display *display)
795 {
796 struct intel_opregion *opregion = display->opregion;
797 bool requested_callbacks = false;
798 u32 tmp;
799
800 /* Sub-function code 0 is okay, let's allow them. */
801 opregion->swsci_gbda_sub_functions = 1;
802 opregion->swsci_sbcb_sub_functions = 1;
803
804 /* We use GBDA to ask for supported GBDA calls. */
805 if (swsci(display, SWSCI_GBDA_SUPPORTED_CALLS, 0, &tmp) == 0) {
806 /* make the bits match the sub-function codes */
807 tmp <<= 1;
808 opregion->swsci_gbda_sub_functions |= tmp;
809 }
810
811 /*
812 * We also use GBDA to ask for _requested_ SBCB callbacks. The driver
813 * must not call interfaces that are not specifically requested by the
814 * bios.
815 */
816 if (swsci(display, SWSCI_GBDA_REQUESTED_CALLBACKS, 0, &tmp) == 0) {
817 /* here, the bits already match sub-function codes */
818 opregion->swsci_sbcb_sub_functions |= tmp;
819 requested_callbacks = true;
820 }
821
822 /*
823 * But we use SBCB to ask for _supported_ SBCB calls. This does not mean
824 * the callback is _requested_. But we still can't call interfaces that
825 * are not requested.
826 */
827 if (swsci(display, SWSCI_SBCB_SUPPORTED_CALLBACKS, 0, &tmp) == 0) {
828 /* make the bits match the sub-function codes */
829 u32 low = tmp & 0x7ff;
830 u32 high = tmp & ~0xfff; /* bit 11 is reserved */
831 tmp = (high << 4) | (low << 1) | 1;
832
833 /* best guess what to do with supported wrt requested */
834 if (requested_callbacks) {
835 u32 req = opregion->swsci_sbcb_sub_functions;
836 if ((req & tmp) != req)
837 drm_dbg(display->drm,
838 "SWSCI BIOS requested (%08x) SBCB callbacks that are not supported (%08x)\n",
839 req, tmp);
840 /* XXX: for now, trust the requested callbacks */
841 /* opregion->swsci_sbcb_sub_functions &= tmp; */
842 } else {
843 opregion->swsci_sbcb_sub_functions |= tmp;
844 }
845 }
846
847 drm_dbg(display->drm,
848 "SWSCI GBDA callbacks %08x, SBCB callbacks %08x\n",
849 opregion->swsci_gbda_sub_functions,
850 opregion->swsci_sbcb_sub_functions);
851 }
852
intel_no_opregion_vbt_callback(const struct dmi_system_id * id)853 static int intel_no_opregion_vbt_callback(const struct dmi_system_id *id)
854 {
855 DRM_DEBUG_KMS("Falling back to manually reading VBT from "
856 "VBIOS ROM for %s\n", id->ident);
857 return 1;
858 }
859
860 static const struct dmi_system_id intel_no_opregion_vbt[] = {
861 {
862 .callback = intel_no_opregion_vbt_callback,
863 .ident = "ThinkCentre A57",
864 .matches = {
865 DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
866 DMI_MATCH(DMI_PRODUCT_NAME, "97027RG"),
867 },
868 },
869 { }
870 };
871
intel_opregion_setup(struct intel_display * display)872 int intel_opregion_setup(struct intel_display *display)
873 {
874 struct intel_opregion *opregion;
875 struct pci_dev *pdev = to_pci_dev(display->drm->dev);
876 u32 asls, mboxes;
877 char buf[sizeof(OPREGION_SIGNATURE)];
878 int err = 0;
879 void *base;
880 const void *vbt;
881 u32 vbt_size;
882
883 BUILD_BUG_ON(sizeof(struct opregion_header) != 0x100);
884 BUILD_BUG_ON(sizeof(struct opregion_acpi) != 0x100);
885 BUILD_BUG_ON(sizeof(struct opregion_swsci) != 0x100);
886 BUILD_BUG_ON(sizeof(struct opregion_asle) != 0x100);
887 BUILD_BUG_ON(sizeof(struct opregion_asle_ext) != 0x400);
888
889 pci_read_config_dword(pdev, ASLS, &asls);
890 drm_dbg(display->drm, "graphic opregion physical addr: 0x%x\n",
891 asls);
892 if (asls == 0) {
893 drm_dbg(display->drm, "ACPI OpRegion not supported!\n");
894 return -ENOTSUPP;
895 }
896
897 opregion = kzalloc(sizeof(*opregion), GFP_KERNEL);
898 if (!opregion)
899 return -ENOMEM;
900
901 opregion->display = display;
902 display->opregion = opregion;
903
904 INIT_WORK(&opregion->asle_work, asle_work);
905
906 base = memremap(asls, OPREGION_SIZE, MEMREMAP_WB);
907 if (!base) {
908 err = -ENOMEM;
909 goto err_memremap;
910 }
911
912 memcpy(buf, base, sizeof(buf));
913
914 if (memcmp(buf, OPREGION_SIGNATURE, 16)) {
915 drm_dbg(display->drm, "opregion signature mismatch\n");
916 err = -EINVAL;
917 goto err_out;
918 }
919 opregion->header = base;
920
921 drm_dbg(display->drm, "ACPI OpRegion version %u.%u.%u\n",
922 opregion->header->over.major,
923 opregion->header->over.minor,
924 opregion->header->over.revision);
925
926 mboxes = opregion->header->mboxes;
927 if (mboxes & MBOX_ACPI) {
928 drm_dbg(display->drm, "Public ACPI methods supported\n");
929 opregion->acpi = base + OPREGION_ACPI_OFFSET;
930 /*
931 * Indicate we handle monitor hotplug events ourselves so we do
932 * not need ACPI notifications for them. Disabling these avoids
933 * triggering the AML code doing the notifation, which may be
934 * broken as Windows also seems to disable these.
935 */
936 opregion->acpi->chpd = 1;
937 }
938
939 if (mboxes & MBOX_SWSCI) {
940 u8 major = opregion->header->over.major;
941
942 if (major >= 3) {
943 drm_err(display->drm, "SWSCI Mailbox #2 present for opregion v3.x, ignoring\n");
944 } else {
945 if (major >= 2)
946 drm_dbg(display->drm, "SWSCI Mailbox #2 present for opregion v2.x\n");
947 drm_dbg(display->drm, "SWSCI supported\n");
948 opregion->swsci = base + OPREGION_SWSCI_OFFSET;
949 swsci_setup(display);
950 }
951 }
952
953 if (mboxes & MBOX_ASLE) {
954 drm_dbg(display->drm, "ASLE supported\n");
955 opregion->asle = base + OPREGION_ASLE_OFFSET;
956
957 opregion->asle->ardy = ASLE_ARDY_NOT_READY;
958 }
959
960 if (mboxes & MBOX_ASLE_EXT) {
961 drm_dbg(display->drm, "ASLE extension supported\n");
962 opregion->asle_ext = base + OPREGION_ASLE_EXT_OFFSET;
963 }
964
965 if (mboxes & MBOX_BACKLIGHT) {
966 drm_dbg(display->drm, "Mailbox #2 for backlight present\n");
967 }
968
969 if (dmi_check_system(intel_no_opregion_vbt))
970 goto out;
971
972 if (opregion->header->over.major >= 2 && opregion->asle &&
973 opregion->asle->rvda && opregion->asle->rvds) {
974 resource_size_t rvda = opregion->asle->rvda;
975
976 /*
977 * opregion 2.0: rvda is the physical VBT address.
978 *
979 * opregion 2.1+: rvda is unsigned, relative offset from
980 * opregion base, and should never point within opregion.
981 */
982 if (opregion->header->over.major > 2 ||
983 opregion->header->over.minor >= 1) {
984 drm_WARN_ON(display->drm, rvda < OPREGION_SIZE);
985
986 rvda += asls;
987 }
988
989 opregion->rvda = memremap(rvda, opregion->asle->rvds,
990 MEMREMAP_WB);
991
992 vbt = opregion->rvda;
993 vbt_size = opregion->asle->rvds;
994 if (intel_bios_is_valid_vbt(display, vbt, vbt_size)) {
995 drm_dbg_kms(display->drm,
996 "Found valid VBT in ACPI OpRegion (RVDA)\n");
997 opregion->vbt = vbt;
998 opregion->vbt_size = vbt_size;
999 goto out;
1000 } else {
1001 drm_dbg_kms(display->drm,
1002 "Invalid VBT in ACPI OpRegion (RVDA)\n");
1003 memunmap(opregion->rvda);
1004 opregion->rvda = NULL;
1005 }
1006 }
1007
1008 vbt = base + OPREGION_VBT_OFFSET;
1009 /*
1010 * The VBT specification says that if the ASLE ext mailbox is not used
1011 * its area is reserved, but on some CHT boards the VBT extends into the
1012 * ASLE ext area. Allow this even though it is against the spec, so we
1013 * do not end up rejecting the VBT on those boards (and end up not
1014 * finding the LCD panel because of this).
1015 */
1016 vbt_size = (mboxes & MBOX_ASLE_EXT) ?
1017 OPREGION_ASLE_EXT_OFFSET : OPREGION_SIZE;
1018 vbt_size -= OPREGION_VBT_OFFSET;
1019 if (intel_bios_is_valid_vbt(display, vbt, vbt_size)) {
1020 drm_dbg_kms(display->drm,
1021 "Found valid VBT in ACPI OpRegion (Mailbox #4)\n");
1022 opregion->vbt = vbt;
1023 opregion->vbt_size = vbt_size;
1024 } else {
1025 drm_dbg_kms(display->drm,
1026 "Invalid VBT in ACPI OpRegion (Mailbox #4)\n");
1027 }
1028
1029 out:
1030 return 0;
1031
1032 err_out:
1033 memunmap(base);
1034 err_memremap:
1035 kfree(opregion);
1036 display->opregion = NULL;
1037
1038 return err;
1039 }
1040
intel_use_opregion_panel_type_callback(const struct dmi_system_id * id)1041 static int intel_use_opregion_panel_type_callback(const struct dmi_system_id *id)
1042 {
1043 DRM_INFO("Using panel type from OpRegion on %s\n", id->ident);
1044 return 1;
1045 }
1046
1047 static const struct dmi_system_id intel_use_opregion_panel_type[] = {
1048 {
1049 .callback = intel_use_opregion_panel_type_callback,
1050 .ident = "Conrac GmbH IX45GM2",
1051 .matches = {DMI_MATCH(DMI_SYS_VENDOR, "Conrac GmbH"),
1052 DMI_MATCH(DMI_PRODUCT_NAME, "IX45GM2"),
1053 },
1054 },
1055 { }
1056 };
1057
1058 int
intel_opregion_get_panel_type(struct intel_display * display)1059 intel_opregion_get_panel_type(struct intel_display *display)
1060 {
1061 u32 panel_details;
1062 int ret;
1063
1064 ret = swsci(display, SWSCI_GBDA_PANEL_DETAILS, 0x0, &panel_details);
1065 if (ret)
1066 return ret;
1067
1068 ret = (panel_details >> 8) & 0xff;
1069 if (ret > 0x10) {
1070 drm_dbg_kms(display->drm,
1071 "Invalid OpRegion panel type 0x%x\n", ret);
1072 return -EINVAL;
1073 }
1074
1075 /* fall back to VBT panel type? */
1076 if (ret == 0x0) {
1077 drm_dbg_kms(display->drm, "No panel type in OpRegion\n");
1078 return -ENODEV;
1079 }
1080
1081 /*
1082 * So far we know that some machined must use it, others must not use it.
1083 * There doesn't seem to be any way to determine which way to go, except
1084 * via a quirk list :(
1085 */
1086 if (!dmi_check_system(intel_use_opregion_panel_type)) {
1087 drm_dbg_kms(display->drm,
1088 "Ignoring OpRegion panel type (%d)\n", ret - 1);
1089 return -ENODEV;
1090 }
1091
1092 return ret - 1;
1093 }
1094
1095 /**
1096 * intel_opregion_get_edid - Fetch EDID from ACPI OpRegion mailbox #5
1097 * @connector: eDP connector
1098 *
1099 * This reads the ACPI Opregion mailbox #5 to extract the EDID that is passed
1100 * to it.
1101 *
1102 * Returns:
1103 * The EDID in the OpRegion, or NULL if there is none or it's invalid.
1104 *
1105 */
intel_opregion_get_edid(struct intel_connector * connector)1106 const struct drm_edid *intel_opregion_get_edid(struct intel_connector *connector)
1107 {
1108 struct intel_display *display = to_intel_display(connector);
1109 struct intel_opregion *opregion = display->opregion;
1110 const struct drm_edid *drm_edid;
1111 const void *edid;
1112 int len;
1113
1114 if (!opregion || !opregion->asle_ext)
1115 return NULL;
1116
1117 edid = opregion->asle_ext->bddc;
1118
1119 /* Validity corresponds to number of 128-byte blocks */
1120 len = (opregion->asle_ext->phed & ASLE_PHED_EDID_VALID_MASK) * 128;
1121 if (!len || mem_is_zero(edid, len))
1122 return NULL;
1123
1124 drm_edid = drm_edid_alloc(edid, len);
1125
1126 if (!drm_edid_valid(drm_edid)) {
1127 drm_dbg_kms(display->drm, "Invalid EDID in ACPI OpRegion (Mailbox #5)\n");
1128 drm_edid_free(drm_edid);
1129 drm_edid = NULL;
1130 }
1131
1132 return drm_edid;
1133 }
1134
intel_opregion_vbt_present(struct intel_display * display)1135 bool intel_opregion_vbt_present(struct intel_display *display)
1136 {
1137 struct intel_opregion *opregion = display->opregion;
1138
1139 if (!opregion || !opregion->vbt)
1140 return false;
1141
1142 return true;
1143 }
1144
intel_opregion_get_vbt(struct intel_display * display,size_t * size)1145 const void *intel_opregion_get_vbt(struct intel_display *display, size_t *size)
1146 {
1147 struct intel_opregion *opregion = display->opregion;
1148
1149 if (!opregion || !opregion->vbt)
1150 return NULL;
1151
1152 if (size)
1153 *size = opregion->vbt_size;
1154
1155 return kmemdup(opregion->vbt, opregion->vbt_size, GFP_KERNEL);
1156 }
1157
intel_opregion_headless_sku(struct intel_display * display)1158 bool intel_opregion_headless_sku(struct intel_display *display)
1159 {
1160 struct intel_opregion *opregion = display->opregion;
1161 struct opregion_header *header;
1162
1163 if (!opregion)
1164 return false;
1165
1166 header = opregion->header;
1167
1168 if (!header || header->over.major < 2 ||
1169 (header->over.major == 2 && header->over.minor < 3))
1170 return false;
1171
1172 return opregion->header->pcon & PCON_HEADLESS_SKU;
1173 }
1174
intel_opregion_register(struct intel_display * display)1175 void intel_opregion_register(struct intel_display *display)
1176 {
1177 struct intel_opregion *opregion = display->opregion;
1178
1179 if (!opregion)
1180 return;
1181
1182 if (opregion->acpi) {
1183 opregion->acpi_notifier.notifier_call =
1184 intel_opregion_video_event;
1185 register_acpi_notifier(&opregion->acpi_notifier);
1186 }
1187
1188 intel_opregion_resume(display);
1189 }
1190
intel_opregion_resume_display(struct intel_display * display)1191 static void intel_opregion_resume_display(struct intel_display *display)
1192 {
1193 struct intel_opregion *opregion = display->opregion;
1194
1195 if (opregion->acpi) {
1196 intel_didl_outputs(display);
1197 intel_setup_cadls(display);
1198
1199 /*
1200 * Notify BIOS we are ready to handle ACPI video ext notifs.
1201 * Right now, all the events are handled by the ACPI video
1202 * module. We don't actually need to do anything with them.
1203 */
1204 opregion->acpi->csts = 0;
1205 opregion->acpi->drdy = 1;
1206 }
1207
1208 if (opregion->asle) {
1209 opregion->asle->tche = ASLE_TCHE_BLC_EN;
1210 opregion->asle->ardy = ASLE_ARDY_READY;
1211 }
1212
1213 /* Some platforms abuse the _DSM to enable MUX */
1214 intel_dsm_get_bios_data_funcs_supported(display);
1215 }
1216
intel_opregion_resume(struct intel_display * display)1217 void intel_opregion_resume(struct intel_display *display)
1218 {
1219 struct intel_opregion *opregion = display->opregion;
1220
1221 if (!opregion)
1222 return;
1223
1224 if (HAS_DISPLAY(display))
1225 intel_opregion_resume_display(display);
1226
1227 intel_opregion_notify_adapter(display, PCI_D0);
1228 }
1229
intel_opregion_suspend_display(struct intel_display * display)1230 static void intel_opregion_suspend_display(struct intel_display *display)
1231 {
1232 struct intel_opregion *opregion = display->opregion;
1233
1234 if (opregion->asle)
1235 opregion->asle->ardy = ASLE_ARDY_NOT_READY;
1236
1237 cancel_work_sync(&opregion->asle_work);
1238
1239 if (opregion->acpi)
1240 opregion->acpi->drdy = 0;
1241 }
1242
intel_opregion_suspend(struct intel_display * display,pci_power_t state)1243 void intel_opregion_suspend(struct intel_display *display, pci_power_t state)
1244 {
1245 struct intel_opregion *opregion = display->opregion;
1246
1247 if (!opregion)
1248 return;
1249
1250 intel_opregion_notify_adapter(display, state);
1251
1252 if (HAS_DISPLAY(display))
1253 intel_opregion_suspend_display(display);
1254 }
1255
intel_opregion_unregister(struct intel_display * display)1256 void intel_opregion_unregister(struct intel_display *display)
1257 {
1258 struct intel_opregion *opregion = display->opregion;
1259
1260 intel_opregion_suspend(display, PCI_D1);
1261
1262 if (!opregion)
1263 return;
1264
1265 if (opregion->acpi_notifier.notifier_call) {
1266 unregister_acpi_notifier(&opregion->acpi_notifier);
1267 opregion->acpi_notifier.notifier_call = NULL;
1268 }
1269 }
1270
intel_opregion_cleanup(struct intel_display * display)1271 void intel_opregion_cleanup(struct intel_display *display)
1272 {
1273 struct intel_opregion *opregion = display->opregion;
1274
1275 if (!opregion)
1276 return;
1277
1278 memunmap(opregion->header);
1279 if (opregion->rvda)
1280 memunmap(opregion->rvda);
1281 kfree(opregion);
1282 display->opregion = NULL;
1283 }
1284
intel_opregion_show(struct seq_file * m,void * unused)1285 static int intel_opregion_show(struct seq_file *m, void *unused)
1286 {
1287 struct intel_display *display = m->private;
1288 struct intel_opregion *opregion = display->opregion;
1289
1290 if (opregion)
1291 seq_write(m, opregion->header, OPREGION_SIZE);
1292
1293 return 0;
1294 }
1295
1296 DEFINE_SHOW_ATTRIBUTE(intel_opregion);
1297
intel_opregion_debugfs_register(struct intel_display * display)1298 void intel_opregion_debugfs_register(struct intel_display *display)
1299 {
1300 struct drm_minor *minor = display->drm->primary;
1301
1302 debugfs_create_file("i915_opregion", 0444, minor->debugfs_root,
1303 display, &intel_opregion_fops);
1304 }
1305