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 <sys/cdefs.h>
29 __FBSDID("$FreeBSD$");
30
31 #include <dev/drm2/drmP.h>
32 #include <dev/drm2/i915/i915_drm.h>
33 #include <dev/drm2/i915/i915_drv.h>
34 #include <dev/drm2/i915/intel_drv.h>
35 #include <contrib/dev/acpica/include/acpi.h>
36 #include <contrib/dev/acpica/include/accommon.h>
37 #include <dev/acpica/acpivar.h>
38
39 #define PCI_ASLE 0xe4
40 #define PCI_ASLS 0xfc
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
50 #define OPREGION_SIGNATURE "IntelGraphicsMem"
51 #define MBOX_ACPI (1<<0)
52 #define MBOX_SWSCI (1<<1)
53 #define MBOX_ASLE (1<<2)
54
55 struct opregion_header {
56 u8 signature[16];
57 u32 size;
58 u32 opregion_ver;
59 u8 bios_ver[32];
60 u8 vbios_ver[16];
61 u8 driver_ver[16];
62 u32 mboxes;
63 u8 reserved[164];
64 } __attribute__((packed));
65
66 /* OpRegion mailbox #1: public ACPI methods */
67 struct opregion_acpi {
68 u32 drdy; /* driver readiness */
69 u32 csts; /* notification status */
70 u32 cevt; /* current event */
71 u8 rsvd1[20];
72 u32 didl[8]; /* supported display devices ID list */
73 u32 cpdl[8]; /* currently presented display list */
74 u32 cadl[8]; /* currently active display list */
75 u32 nadl[8]; /* next active devices list */
76 u32 aslp; /* ASL sleep time-out */
77 u32 tidx; /* toggle table index */
78 u32 chpd; /* current hotplug enable indicator */
79 u32 clid; /* current lid state*/
80 u32 cdck; /* current docking state */
81 u32 sxsw; /* Sx state resume */
82 u32 evts; /* ASL supported events */
83 u32 cnot; /* current OS notification */
84 u32 nrdy; /* driver status */
85 u8 rsvd2[60];
86 } __attribute__((packed));
87
88 /* OpRegion mailbox #2: SWSCI */
89 struct opregion_swsci {
90 u32 scic; /* SWSCI command|status|data */
91 u32 parm; /* command parameters */
92 u32 dslp; /* driver sleep time-out */
93 u8 rsvd[244];
94 } __attribute__((packed));
95
96 /* OpRegion mailbox #3: ASLE */
97 struct opregion_asle {
98 u32 ardy; /* driver readiness */
99 u32 aslc; /* ASLE interrupt command */
100 u32 tche; /* technology enabled indicator */
101 u32 alsi; /* current ALS illuminance reading */
102 u32 bclp; /* backlight brightness to set */
103 u32 pfit; /* panel fitting state */
104 u32 cblv; /* current brightness level */
105 u16 bclm[20]; /* backlight level duty cycle mapping table */
106 u32 cpfm; /* current panel fitting mode */
107 u32 epfm; /* enabled panel fitting modes */
108 u8 plut[74]; /* panel LUT and identifier */
109 u32 pfmb; /* PWM freq and min brightness */
110 u8 rsvd[102];
111 } __attribute__((packed));
112
113 /* ASLE irq request bits */
114 #define ASLE_SET_ALS_ILLUM (1 << 0)
115 #define ASLE_SET_BACKLIGHT (1 << 1)
116 #define ASLE_SET_PFIT (1 << 2)
117 #define ASLE_SET_PWM_FREQ (1 << 3)
118 #define ASLE_REQ_MSK 0xf
119
120 /* response bits of ASLE irq request */
121 #define ASLE_ALS_ILLUM_FAILED (1<<10)
122 #define ASLE_BACKLIGHT_FAILED (1<<12)
123 #define ASLE_PFIT_FAILED (1<<14)
124 #define ASLE_PWM_FREQ_FAILED (1<<16)
125
126 /* ASLE backlight brightness to set */
127 #define ASLE_BCLP_VALID (1<<31)
128 #define ASLE_BCLP_MSK (~(1<<31))
129
130 /* ASLE panel fitting request */
131 #define ASLE_PFIT_VALID (1<<31)
132 #define ASLE_PFIT_CENTER (1<<0)
133 #define ASLE_PFIT_STRETCH_TEXT (1<<1)
134 #define ASLE_PFIT_STRETCH_GFX (1<<2)
135
136 /* PWM frequency and minimum brightness */
137 #define ASLE_PFMB_BRIGHTNESS_MASK (0xff)
138 #define ASLE_PFMB_BRIGHTNESS_VALID (1<<8)
139 #define ASLE_PFMB_PWM_MASK (0x7ffffe00)
140 #define ASLE_PFMB_PWM_VALID (1<<31)
141
142 #define ASLE_CBLV_VALID (1<<31)
143
144 #define ACPI_OTHER_OUTPUT (0<<8)
145 #define ACPI_VGA_OUTPUT (1<<8)
146 #define ACPI_TV_OUTPUT (2<<8)
147 #define ACPI_DIGITAL_OUTPUT (3<<8)
148 #define ACPI_LVDS_OUTPUT (4<<8)
149
150 #if defined(CONFIG_ACPI)
asle_set_backlight(struct drm_device * dev,u32 bclp)151 static u32 asle_set_backlight(struct drm_device *dev, u32 bclp)
152 {
153 struct drm_i915_private *dev_priv = dev->dev_private;
154 struct opregion_asle *asle = dev_priv->opregion.asle;
155 u32 max;
156
157 if (!(bclp & ASLE_BCLP_VALID))
158 return ASLE_BACKLIGHT_FAILED;
159
160 bclp &= ASLE_BCLP_MSK;
161 if (bclp > 255)
162 return ASLE_BACKLIGHT_FAILED;
163
164 max = intel_panel_get_max_backlight(dev);
165 intel_panel_set_backlight(dev, bclp * max / 255);
166 asle->cblv = (bclp*0x64)/0xff | ASLE_CBLV_VALID;
167
168 return 0;
169 }
170
asle_set_als_illum(struct drm_device * dev,u32 alsi)171 static u32 asle_set_als_illum(struct drm_device *dev, u32 alsi)
172 {
173 /* alsi is the current ALS reading in lux. 0 indicates below sensor
174 range, 0xffff indicates above sensor range. 1-0xfffe are valid */
175 return 0;
176 }
177
asle_set_pwm_freq(struct drm_device * dev,u32 pfmb)178 static u32 asle_set_pwm_freq(struct drm_device *dev, u32 pfmb)
179 {
180 struct drm_i915_private *dev_priv = dev->dev_private;
181 if (pfmb & ASLE_PFMB_PWM_VALID) {
182 u32 blc_pwm_ctl = I915_READ(BLC_PWM_CTL);
183 u32 pwm = pfmb & ASLE_PFMB_PWM_MASK;
184 blc_pwm_ctl &= BACKLIGHT_DUTY_CYCLE_MASK;
185 pwm = pwm >> 9;
186 /* FIXME - what do we do with the PWM? */
187 }
188 return 0;
189 }
190
asle_set_pfit(struct drm_device * dev,u32 pfit)191 static u32 asle_set_pfit(struct drm_device *dev, u32 pfit)
192 {
193 /* Panel fitting is currently controlled by the X code, so this is a
194 noop until modesetting support works fully */
195 if (!(pfit & ASLE_PFIT_VALID))
196 return ASLE_PFIT_FAILED;
197 return 0;
198 }
199
intel_opregion_asle_intr(struct drm_device * dev)200 void intel_opregion_asle_intr(struct drm_device *dev)
201 {
202 struct drm_i915_private *dev_priv = dev->dev_private;
203 struct opregion_asle *asle = dev_priv->opregion.asle;
204 u32 asle_stat = 0;
205 u32 asle_req;
206
207 if (!asle)
208 return;
209
210 asle_req = asle->aslc & ASLE_REQ_MSK;
211
212 if (!asle_req) {
213 DRM_DEBUG("non asle set request??\n");
214 return;
215 }
216
217 if (asle_req & ASLE_SET_ALS_ILLUM)
218 asle_stat |= asle_set_als_illum(dev, asle->alsi);
219
220 if (asle_req & ASLE_SET_BACKLIGHT)
221 asle_stat |= asle_set_backlight(dev, asle->bclp);
222
223 if (asle_req & ASLE_SET_PFIT)
224 asle_stat |= asle_set_pfit(dev, asle->pfit);
225
226 if (asle_req & ASLE_SET_PWM_FREQ)
227 asle_stat |= asle_set_pwm_freq(dev, asle->pfmb);
228
229 asle->aslc = asle_stat;
230 }
231
intel_opregion_gse_intr(struct drm_device * dev)232 void intel_opregion_gse_intr(struct drm_device *dev)
233 {
234 struct drm_i915_private *dev_priv = dev->dev_private;
235 struct opregion_asle *asle = dev_priv->opregion.asle;
236 u32 asle_stat = 0;
237 u32 asle_req;
238
239 if (!asle)
240 return;
241
242 asle_req = asle->aslc & ASLE_REQ_MSK;
243
244 if (!asle_req) {
245 DRM_DEBUG("non asle set request??\n");
246 return;
247 }
248
249 if (asle_req & ASLE_SET_ALS_ILLUM) {
250 DRM_DEBUG("Illum is not supported\n");
251 asle_stat |= ASLE_ALS_ILLUM_FAILED;
252 }
253
254 if (asle_req & ASLE_SET_BACKLIGHT)
255 asle_stat |= asle_set_backlight(dev, asle->bclp);
256
257 if (asle_req & ASLE_SET_PFIT) {
258 DRM_DEBUG("Pfit is not supported\n");
259 asle_stat |= ASLE_PFIT_FAILED;
260 }
261
262 if (asle_req & ASLE_SET_PWM_FREQ) {
263 DRM_DEBUG("PWM freq is not supported\n");
264 asle_stat |= ASLE_PWM_FREQ_FAILED;
265 }
266
267 asle->aslc = asle_stat;
268 }
269 #define ASLE_ALS_EN (1<<0)
270 #define ASLE_BLC_EN (1<<1)
271 #define ASLE_PFIT_EN (1<<2)
272 #define ASLE_PFMB_EN (1<<3)
273
intel_opregion_enable_asle(struct drm_device * dev)274 void intel_opregion_enable_asle(struct drm_device *dev)
275 {
276 struct drm_i915_private *dev_priv = dev->dev_private;
277 struct opregion_asle *asle = dev_priv->opregion.asle;
278
279 if (asle) {
280 if (IS_MOBILE(dev))
281 intel_enable_asle(dev);
282
283 asle->tche = ASLE_ALS_EN | ASLE_BLC_EN | ASLE_PFIT_EN |
284 ASLE_PFMB_EN;
285 asle->ardy = 1;
286 }
287 }
288
289 #define ACPI_EV_DISPLAY_SWITCH (1<<0)
290 #define ACPI_EV_LID (1<<1)
291 #define ACPI_EV_DOCK (1<<2)
292
293 static struct intel_opregion *system_opregion;
294
295 #if 0
296 static int intel_opregion_video_event(struct notifier_block *nb,
297 unsigned long val, void *data)
298 {
299 /* The only video events relevant to opregion are 0x80. These indicate
300 either a docking event, lid switch or display switch request. In
301 Linux, these are handled by the dock, button and video drivers.
302 */
303 struct opregion_acpi *acpi;
304 struct acpi_bus_event *event = data;
305 int ret = NOTIFY_OK;
306
307 if (strcmp(event->device_class, ACPI_VIDEO_CLASS) != 0)
308 return NOTIFY_DONE;
309
310 if (!system_opregion)
311 return NOTIFY_DONE;
312
313 acpi = system_opregion->acpi;
314
315 if (event->type == 0x80 && !(acpi->cevt & 0x1))
316 ret = NOTIFY_BAD;
317
318 acpi->csts = 0;
319
320 return ret;
321 }
322
323 static struct notifier_block intel_opregion_notifier = {
324 .notifier_call = intel_opregion_video_event,
325 };
326 #endif
327
328 /*
329 * Initialise the DIDL field in opregion. This passes a list of devices to
330 * the firmware. Values are defined by section B.4.2 of the ACPI specification
331 * (version 3)
332 */
333
acpi_is_video_device(ACPI_HANDLE devh)334 static int acpi_is_video_device(ACPI_HANDLE devh) {
335 ACPI_HANDLE h;
336 if (ACPI_FAILURE(AcpiGetHandle(devh, "_DOD", &h)) ||
337 ACPI_FAILURE(AcpiGetHandle(devh, "_DOS", &h))) {
338 return 0;
339 }
340 return 1;
341 }
342
intel_didl_outputs(struct drm_device * dev)343 static void intel_didl_outputs(struct drm_device *dev)
344 {
345 struct drm_i915_private *dev_priv = dev->dev_private;
346 struct intel_opregion *opregion = &dev_priv->opregion;
347 struct drm_connector *connector;
348 u32 device_id;
349 ACPI_HANDLE handle, acpi_video_bus, acpi_cdev;
350 ACPI_STATUS status;
351 int i = 0;
352
353 handle = acpi_get_handle(dev->dev);
354 if (!handle)
355 return;
356
357 if (acpi_is_video_device(handle))
358 acpi_video_bus = handle;
359 else {
360 acpi_cdev = NULL;
361 acpi_video_bus = NULL;
362 while (AcpiGetNextObject(ACPI_TYPE_DEVICE, handle, acpi_cdev,
363 &acpi_cdev) != AE_NOT_FOUND) {
364 if (acpi_is_video_device(acpi_cdev)) {
365 acpi_video_bus = acpi_cdev;
366 break;
367 }
368 }
369 #if 0
370 list_for_each_entry(acpi_cdev, &acpi_dev->children, node) {
371 if (acpi_is_video_device(acpi_cdev)) {
372 acpi_video_bus = acpi_cdev;
373 break;
374 }
375 }
376 #endif
377 }
378
379 if (!acpi_video_bus) {
380 device_printf(dev->dev, "No ACPI video bus found\n");
381 return;
382 }
383
384 acpi_cdev = NULL;
385 while (AcpiGetNextObject(ACPI_TYPE_DEVICE, acpi_video_bus, acpi_cdev,
386 &acpi_cdev) != AE_NOT_FOUND) {
387 if (i >= 8) {
388 device_printf(dev->dev, "More than 8 outputs detected\n");
389 return;
390 }
391 status = acpi_GetInteger(acpi_cdev, "_ADR", &device_id);
392 if (ACPI_SUCCESS(status)) {
393 if (!device_id)
394 goto blind_set;
395 opregion->acpi->didl[i] = (u32)(device_id & 0x0f0f);
396 i++;
397 }
398 }
399 #if 0
400 list_for_each_entry(acpi_cdev, &acpi_video_bus->children, node) {
401 if (i >= 8) {
402 dev_printk(KERN_ERR, &dev->pdev->dev,
403 "More than 8 outputs detected\n");
404 return;
405 }
406 status =
407 acpi_evaluate_integer(acpi_cdev->handle, "_ADR",
408 NULL, &device_id);
409 if (ACPI_SUCCESS(status)) {
410 if (!device_id)
411 goto blind_set;
412 opregion->acpi->didl[i] = (u32)(device_id & 0x0f0f);
413 i++;
414 }
415 }
416 #endif
417
418 end:
419 /* If fewer than 8 outputs, the list must be null terminated */
420 if (i < 8)
421 opregion->acpi->didl[i] = 0;
422 return;
423
424 blind_set:
425 i = 0;
426 list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
427 int output_type = ACPI_OTHER_OUTPUT;
428 if (i >= 8) {
429 device_printf(dev->dev,
430 "More than 8 outputs detected\n");
431 return;
432 }
433 switch (connector->connector_type) {
434 case DRM_MODE_CONNECTOR_VGA:
435 case DRM_MODE_CONNECTOR_DVIA:
436 output_type = ACPI_VGA_OUTPUT;
437 break;
438 case DRM_MODE_CONNECTOR_Composite:
439 case DRM_MODE_CONNECTOR_SVIDEO:
440 case DRM_MODE_CONNECTOR_Component:
441 case DRM_MODE_CONNECTOR_9PinDIN:
442 output_type = ACPI_TV_OUTPUT;
443 break;
444 case DRM_MODE_CONNECTOR_DVII:
445 case DRM_MODE_CONNECTOR_DVID:
446 case DRM_MODE_CONNECTOR_DisplayPort:
447 case DRM_MODE_CONNECTOR_HDMIA:
448 case DRM_MODE_CONNECTOR_HDMIB:
449 output_type = ACPI_DIGITAL_OUTPUT;
450 break;
451 case DRM_MODE_CONNECTOR_LVDS:
452 output_type = ACPI_LVDS_OUTPUT;
453 break;
454 }
455 opregion->acpi->didl[i] |= (1<<31) | output_type | i;
456 i++;
457 }
458 goto end;
459 }
460
intel_setup_cadls(struct drm_device * dev)461 static void intel_setup_cadls(struct drm_device *dev)
462 {
463 struct drm_i915_private *dev_priv = dev->dev_private;
464 struct intel_opregion *opregion = &dev_priv->opregion;
465 int i = 0;
466 u32 disp_id;
467
468 /* Initialize the CADL field by duplicating the DIDL values.
469 * Technically, this is not always correct as display outputs may exist,
470 * but not active. This initialization is necessary for some Clevo
471 * laptops that check this field before processing the brightness and
472 * display switching hotkeys. Just like DIDL, CADL is NULL-terminated if
473 * there are less than eight devices. */
474 do {
475 disp_id = opregion->acpi->didl[i];
476 opregion->acpi->cadl[i] = disp_id;
477 } while (++i < 8 && disp_id != 0);
478 }
479
intel_opregion_init(struct drm_device * dev)480 void intel_opregion_init(struct drm_device *dev)
481 {
482 struct drm_i915_private *dev_priv = dev->dev_private;
483 struct intel_opregion *opregion = &dev_priv->opregion;
484
485 if (!opregion->header)
486 return;
487
488 if (opregion->acpi) {
489 if (drm_core_check_feature(dev, DRIVER_MODESET)) {
490 intel_didl_outputs(dev);
491 intel_setup_cadls(dev);
492 }
493
494 /* Notify BIOS we are ready to handle ACPI video ext notifs.
495 * Right now, all the events are handled by the ACPI video module.
496 * We don't actually need to do anything with them. */
497 opregion->acpi->csts = 0;
498 opregion->acpi->drdy = 1;
499
500 system_opregion = opregion;
501 #if 0
502 register_acpi_notifier(&intel_opregion_notifier);
503 #endif
504 }
505
506 if (opregion->asle)
507 intel_opregion_enable_asle(dev);
508 }
509
intel_opregion_fini(struct drm_device * dev)510 void intel_opregion_fini(struct drm_device *dev)
511 {
512 struct drm_i915_private *dev_priv = dev->dev_private;
513 struct intel_opregion *opregion = &dev_priv->opregion;
514
515 if (!opregion->header)
516 return;
517
518 if (opregion->acpi) {
519 opregion->acpi->drdy = 0;
520
521 system_opregion = NULL;
522 #if 0
523 unregister_acpi_notifier(&intel_opregion_notifier);
524 #endif
525 }
526
527 /* just clear all opregion memory pointers now */
528 pmap_unmapdev((vm_offset_t)opregion->header, OPREGION_SIZE);
529 opregion->header = NULL;
530 opregion->acpi = NULL;
531 opregion->swsci = NULL;
532 opregion->asle = NULL;
533 opregion->vbt = NULL;
534 }
535 #else
536 int
intel_opregion_init(struct drm_device * dev)537 intel_opregion_init(struct drm_device *dev)
538 {
539
540 return (0);
541 }
542
543 void
intel_opregion_fini(struct drm_device * dev)544 intel_opregion_fini(struct drm_device *dev)
545 {
546 struct drm_i915_private *dev_priv;
547 struct intel_opregion *opregion;
548
549 dev_priv = dev->dev_private;
550 opregion = &dev_priv->opregion;
551
552 if (opregion->header == NULL)
553 return;
554
555 pmap_unmapdev((vm_offset_t)opregion->header, OPREGION_SIZE);
556 opregion->header = NULL;
557 opregion->acpi = NULL;
558 opregion->swsci = NULL;
559 opregion->asle = NULL;
560 opregion->vbt = NULL;
561 }
562 #endif
563
intel_opregion_setup(struct drm_device * dev)564 int intel_opregion_setup(struct drm_device *dev)
565 {
566 struct drm_i915_private *dev_priv = dev->dev_private;
567 struct intel_opregion *opregion = &dev_priv->opregion;
568 char *base;
569 u32 asls, mboxes;
570 int err = 0;
571
572 asls = pci_read_config(dev->dev, PCI_ASLS, 4);
573 DRM_DEBUG("graphic opregion physical addr: 0x%x\n", asls);
574 if (asls == 0) {
575 DRM_DEBUG("ACPI OpRegion not supported!\n");
576 return -ENOTSUP;
577 }
578
579 base = (void *)pmap_mapbios(asls, OPREGION_SIZE);
580 if (!base)
581 return -ENOMEM;
582
583 if (memcmp(base, OPREGION_SIGNATURE, 16)) {
584 DRM_DEBUG("opregion signature mismatch\n");
585 err = -EINVAL;
586 goto err_out;
587 }
588 opregion->header = (struct opregion_header *)base;
589 opregion->vbt = base + OPREGION_VBT_OFFSET;
590
591 opregion->lid_state = (u32 *)(base + ACPI_CLID);
592
593 mboxes = opregion->header->mboxes;
594 if (mboxes & MBOX_ACPI) {
595 DRM_DEBUG("Public ACPI methods supported\n");
596 opregion->acpi = (struct opregion_acpi *)(base +
597 OPREGION_ACPI_OFFSET);
598 }
599
600 if (mboxes & MBOX_SWSCI) {
601 DRM_DEBUG("SWSCI supported\n");
602 opregion->swsci = (struct opregion_swsci *)(base +
603 OPREGION_SWSCI_OFFSET);
604 }
605 if (mboxes & MBOX_ASLE) {
606 DRM_DEBUG("ASLE supported\n");
607 opregion->asle = (struct opregion_asle *)(base +
608 OPREGION_ASLE_OFFSET);
609 }
610
611 return 0;
612
613 err_out:
614 pmap_unmapdev((vm_offset_t)base, OPREGION_SIZE);
615 return err;
616 }
617