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 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
29
30 #include <linux/acpi.h>
31 #include <linux/acpi_io.h>
32 #include <acpi/video.h>
33
34 #include <drm/drmP.h>
35 #include <drm/i915_drm.h>
36 #include "i915_drv.h"
37 #include "intel_drv.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 #ifdef 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 __iomem *asle = dev_priv->opregion.asle;
155 u32 max;
156
157 DRM_DEBUG_DRIVER("bclp = 0x%08x\n", bclp);
158
159 if (!(bclp & ASLE_BCLP_VALID))
160 return ASLE_BACKLIGHT_FAILED;
161
162 bclp &= ASLE_BCLP_MSK;
163 if (bclp > 255)
164 return ASLE_BACKLIGHT_FAILED;
165
166 max = intel_panel_get_max_backlight(dev);
167 intel_panel_set_backlight(dev, bclp * max / 255);
168 iowrite32((bclp*0x64)/0xff | ASLE_CBLV_VALID, &asle->cblv);
169
170 return 0;
171 }
172
asle_set_als_illum(struct drm_device * dev,u32 alsi)173 static u32 asle_set_als_illum(struct drm_device *dev, u32 alsi)
174 {
175 /* alsi is the current ALS reading in lux. 0 indicates below sensor
176 range, 0xffff indicates above sensor range. 1-0xfffe are valid */
177 return 0;
178 }
179
asle_set_pwm_freq(struct drm_device * dev,u32 pfmb)180 static u32 asle_set_pwm_freq(struct drm_device *dev, u32 pfmb)
181 {
182 struct drm_i915_private *dev_priv = dev->dev_private;
183 if (pfmb & ASLE_PFMB_PWM_VALID) {
184 u32 blc_pwm_ctl = I915_READ(BLC_PWM_CTL);
185 u32 pwm = pfmb & ASLE_PFMB_PWM_MASK;
186 blc_pwm_ctl &= BACKLIGHT_DUTY_CYCLE_MASK;
187 pwm = pwm >> 9;
188 /* FIXME - what do we do with the PWM? */
189 }
190 return 0;
191 }
192
asle_set_pfit(struct drm_device * dev,u32 pfit)193 static u32 asle_set_pfit(struct drm_device *dev, u32 pfit)
194 {
195 /* Panel fitting is currently controlled by the X code, so this is a
196 noop until modesetting support works fully */
197 if (!(pfit & ASLE_PFIT_VALID))
198 return ASLE_PFIT_FAILED;
199 return 0;
200 }
201
intel_opregion_asle_intr(struct drm_device * dev)202 void intel_opregion_asle_intr(struct drm_device *dev)
203 {
204 struct drm_i915_private *dev_priv = dev->dev_private;
205 struct opregion_asle __iomem *asle = dev_priv->opregion.asle;
206 u32 asle_stat = 0;
207 u32 asle_req;
208
209 if (!asle)
210 return;
211
212 asle_req = ioread32(&asle->aslc) & ASLE_REQ_MSK;
213
214 if (!asle_req) {
215 DRM_DEBUG_DRIVER("non asle set request??\n");
216 return;
217 }
218
219 if (asle_req & ASLE_SET_ALS_ILLUM)
220 asle_stat |= asle_set_als_illum(dev, ioread32(&asle->alsi));
221
222 if (asle_req & ASLE_SET_BACKLIGHT)
223 asle_stat |= asle_set_backlight(dev, ioread32(&asle->bclp));
224
225 if (asle_req & ASLE_SET_PFIT)
226 asle_stat |= asle_set_pfit(dev, ioread32(&asle->pfit));
227
228 if (asle_req & ASLE_SET_PWM_FREQ)
229 asle_stat |= asle_set_pwm_freq(dev, ioread32(&asle->pfmb));
230
231 iowrite32(asle_stat, &asle->aslc);
232 }
233
intel_opregion_gse_intr(struct drm_device * dev)234 void intel_opregion_gse_intr(struct drm_device *dev)
235 {
236 struct drm_i915_private *dev_priv = dev->dev_private;
237 struct opregion_asle __iomem *asle = dev_priv->opregion.asle;
238 u32 asle_stat = 0;
239 u32 asle_req;
240
241 if (!asle)
242 return;
243
244 asle_req = ioread32(&asle->aslc) & ASLE_REQ_MSK;
245
246 if (!asle_req) {
247 DRM_DEBUG_DRIVER("non asle set request??\n");
248 return;
249 }
250
251 if (asle_req & ASLE_SET_ALS_ILLUM) {
252 DRM_DEBUG_DRIVER("Illum is not supported\n");
253 asle_stat |= ASLE_ALS_ILLUM_FAILED;
254 }
255
256 if (asle_req & ASLE_SET_BACKLIGHT)
257 asle_stat |= asle_set_backlight(dev, ioread32(&asle->bclp));
258
259 if (asle_req & ASLE_SET_PFIT) {
260 DRM_DEBUG_DRIVER("Pfit is not supported\n");
261 asle_stat |= ASLE_PFIT_FAILED;
262 }
263
264 if (asle_req & ASLE_SET_PWM_FREQ) {
265 DRM_DEBUG_DRIVER("PWM freq is not supported\n");
266 asle_stat |= ASLE_PWM_FREQ_FAILED;
267 }
268
269 iowrite32(asle_stat, &asle->aslc);
270 }
271 #define ASLE_ALS_EN (1<<0)
272 #define ASLE_BLC_EN (1<<1)
273 #define ASLE_PFIT_EN (1<<2)
274 #define ASLE_PFMB_EN (1<<3)
275
intel_opregion_enable_asle(struct drm_device * dev)276 void intel_opregion_enable_asle(struct drm_device *dev)
277 {
278 struct drm_i915_private *dev_priv = dev->dev_private;
279 struct opregion_asle __iomem *asle = dev_priv->opregion.asle;
280
281 if (asle) {
282 if (IS_MOBILE(dev))
283 intel_enable_asle(dev);
284
285 iowrite32(ASLE_ALS_EN | ASLE_BLC_EN | ASLE_PFIT_EN |
286 ASLE_PFMB_EN,
287 &asle->tche);
288 iowrite32(1, &asle->ardy);
289 }
290 }
291
292 #define ACPI_EV_DISPLAY_SWITCH (1<<0)
293 #define ACPI_EV_LID (1<<1)
294 #define ACPI_EV_DOCK (1<<2)
295
296 static struct intel_opregion *system_opregion;
297
intel_opregion_video_event(struct notifier_block * nb,unsigned long val,void * data)298 static int intel_opregion_video_event(struct notifier_block *nb,
299 unsigned long val, void *data)
300 {
301 /* The only video events relevant to opregion are 0x80. These indicate
302 either a docking event, lid switch or display switch request. In
303 Linux, these are handled by the dock, button and video drivers.
304 */
305
306 struct opregion_acpi __iomem *acpi;
307 struct acpi_bus_event *event = data;
308 int ret = NOTIFY_OK;
309
310 if (strcmp(event->device_class, ACPI_VIDEO_CLASS) != 0)
311 return NOTIFY_DONE;
312
313 if (!system_opregion)
314 return NOTIFY_DONE;
315
316 acpi = system_opregion->acpi;
317
318 if (event->type == 0x80 &&
319 (ioread32(&acpi->cevt) & 1) == 0)
320 ret = NOTIFY_BAD;
321
322 iowrite32(0, &acpi->csts);
323
324 return ret;
325 }
326
327 static struct notifier_block intel_opregion_notifier = {
328 .notifier_call = intel_opregion_video_event,
329 };
330
331 /*
332 * Initialise the DIDL field in opregion. This passes a list of devices to
333 * the firmware. Values are defined by section B.4.2 of the ACPI specification
334 * (version 3)
335 */
336
intel_didl_outputs(struct drm_device * dev)337 static void intel_didl_outputs(struct drm_device *dev)
338 {
339 struct drm_i915_private *dev_priv = dev->dev_private;
340 struct intel_opregion *opregion = &dev_priv->opregion;
341 struct drm_connector *connector;
342 acpi_handle handle;
343 struct acpi_device *acpi_dev, *acpi_cdev, *acpi_video_bus = NULL;
344 unsigned long long device_id;
345 acpi_status status;
346 u32 temp;
347 int i = 0;
348
349 handle = DEVICE_ACPI_HANDLE(&dev->pdev->dev);
350 if (!handle || acpi_bus_get_device(handle, &acpi_dev))
351 return;
352
353 if (acpi_is_video_device(handle))
354 acpi_video_bus = acpi_dev;
355 else {
356 list_for_each_entry(acpi_cdev, &acpi_dev->children, node) {
357 if (acpi_is_video_device(acpi_cdev->handle)) {
358 acpi_video_bus = acpi_cdev;
359 break;
360 }
361 }
362 }
363
364 if (!acpi_video_bus) {
365 pr_warn("No ACPI video bus found\n");
366 return;
367 }
368
369 list_for_each_entry(acpi_cdev, &acpi_video_bus->children, node) {
370 if (i >= 8) {
371 dev_printk(KERN_ERR, &dev->pdev->dev,
372 "More than 8 outputs detected\n");
373 return;
374 }
375 status =
376 acpi_evaluate_integer(acpi_cdev->handle, "_ADR",
377 NULL, &device_id);
378 if (ACPI_SUCCESS(status)) {
379 if (!device_id)
380 goto blind_set;
381 iowrite32((u32)(device_id & 0x0f0f),
382 &opregion->acpi->didl[i]);
383 i++;
384 }
385 }
386
387 end:
388 /* If fewer than 8 outputs, the list must be null terminated */
389 if (i < 8)
390 iowrite32(0, &opregion->acpi->didl[i]);
391 return;
392
393 blind_set:
394 i = 0;
395 list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
396 int output_type = ACPI_OTHER_OUTPUT;
397 if (i >= 8) {
398 dev_printk(KERN_ERR, &dev->pdev->dev,
399 "More than 8 outputs detected\n");
400 return;
401 }
402 switch (connector->connector_type) {
403 case DRM_MODE_CONNECTOR_VGA:
404 case DRM_MODE_CONNECTOR_DVIA:
405 output_type = ACPI_VGA_OUTPUT;
406 break;
407 case DRM_MODE_CONNECTOR_Composite:
408 case DRM_MODE_CONNECTOR_SVIDEO:
409 case DRM_MODE_CONNECTOR_Component:
410 case DRM_MODE_CONNECTOR_9PinDIN:
411 output_type = ACPI_TV_OUTPUT;
412 break;
413 case DRM_MODE_CONNECTOR_DVII:
414 case DRM_MODE_CONNECTOR_DVID:
415 case DRM_MODE_CONNECTOR_DisplayPort:
416 case DRM_MODE_CONNECTOR_HDMIA:
417 case DRM_MODE_CONNECTOR_HDMIB:
418 output_type = ACPI_DIGITAL_OUTPUT;
419 break;
420 case DRM_MODE_CONNECTOR_LVDS:
421 output_type = ACPI_LVDS_OUTPUT;
422 break;
423 }
424 temp = ioread32(&opregion->acpi->didl[i]);
425 iowrite32(temp | (1<<31) | output_type | i,
426 &opregion->acpi->didl[i]);
427 i++;
428 }
429 goto end;
430 }
431
intel_setup_cadls(struct drm_device * dev)432 static void intel_setup_cadls(struct drm_device *dev)
433 {
434 struct drm_i915_private *dev_priv = dev->dev_private;
435 struct intel_opregion *opregion = &dev_priv->opregion;
436 int i = 0;
437 u32 disp_id;
438
439 /* Initialize the CADL field by duplicating the DIDL values.
440 * Technically, this is not always correct as display outputs may exist,
441 * but not active. This initialization is necessary for some Clevo
442 * laptops that check this field before processing the brightness and
443 * display switching hotkeys. Just like DIDL, CADL is NULL-terminated if
444 * there are less than eight devices. */
445 do {
446 disp_id = ioread32(&opregion->acpi->didl[i]);
447 iowrite32(disp_id, &opregion->acpi->cadl[i]);
448 } while (++i < 8 && disp_id != 0);
449 }
450
intel_opregion_init(struct drm_device * dev)451 void intel_opregion_init(struct drm_device *dev)
452 {
453 struct drm_i915_private *dev_priv = dev->dev_private;
454 struct intel_opregion *opregion = &dev_priv->opregion;
455
456 if (!opregion->header)
457 return;
458
459 if (opregion->acpi) {
460 if (drm_core_check_feature(dev, DRIVER_MODESET)) {
461 intel_didl_outputs(dev);
462 intel_setup_cadls(dev);
463 }
464
465 /* Notify BIOS we are ready to handle ACPI video ext notifs.
466 * Right now, all the events are handled by the ACPI video module.
467 * We don't actually need to do anything with them. */
468 iowrite32(0, &opregion->acpi->csts);
469 iowrite32(1, &opregion->acpi->drdy);
470
471 system_opregion = opregion;
472 register_acpi_notifier(&intel_opregion_notifier);
473 }
474
475 if (opregion->asle)
476 intel_opregion_enable_asle(dev);
477 }
478
intel_opregion_fini(struct drm_device * dev)479 void intel_opregion_fini(struct drm_device *dev)
480 {
481 struct drm_i915_private *dev_priv = dev->dev_private;
482 struct intel_opregion *opregion = &dev_priv->opregion;
483
484 if (!opregion->header)
485 return;
486
487 if (opregion->acpi) {
488 iowrite32(0, &opregion->acpi->drdy);
489
490 system_opregion = NULL;
491 unregister_acpi_notifier(&intel_opregion_notifier);
492 }
493
494 /* just clear all opregion memory pointers now */
495 iounmap(opregion->header);
496 opregion->header = NULL;
497 opregion->acpi = NULL;
498 opregion->swsci = NULL;
499 opregion->asle = NULL;
500 opregion->vbt = NULL;
501 }
502 #endif
503
intel_opregion_setup(struct drm_device * dev)504 int intel_opregion_setup(struct drm_device *dev)
505 {
506 struct drm_i915_private *dev_priv = dev->dev_private;
507 struct intel_opregion *opregion = &dev_priv->opregion;
508 void __iomem *base;
509 u32 asls, mboxes;
510 char buf[sizeof(OPREGION_SIGNATURE)];
511 int err = 0;
512
513 pci_read_config_dword(dev->pdev, PCI_ASLS, &asls);
514 DRM_DEBUG_DRIVER("graphic opregion physical addr: 0x%x\n", asls);
515 if (asls == 0) {
516 DRM_DEBUG_DRIVER("ACPI OpRegion not supported!\n");
517 return -ENOTSUPP;
518 }
519
520 base = acpi_os_ioremap(asls, OPREGION_SIZE);
521 if (!base)
522 return -ENOMEM;
523
524 memcpy_fromio(buf, base, sizeof(buf));
525
526 if (memcmp(buf, OPREGION_SIGNATURE, 16)) {
527 DRM_DEBUG_DRIVER("opregion signature mismatch\n");
528 err = -EINVAL;
529 goto err_out;
530 }
531 opregion->header = base;
532 opregion->vbt = base + OPREGION_VBT_OFFSET;
533
534 opregion->lid_state = base + ACPI_CLID;
535
536 mboxes = ioread32(&opregion->header->mboxes);
537 if (mboxes & MBOX_ACPI) {
538 DRM_DEBUG_DRIVER("Public ACPI methods supported\n");
539 opregion->acpi = base + OPREGION_ACPI_OFFSET;
540 }
541
542 if (mboxes & MBOX_SWSCI) {
543 DRM_DEBUG_DRIVER("SWSCI supported\n");
544 opregion->swsci = base + OPREGION_SWSCI_OFFSET;
545 }
546 if (mboxes & MBOX_ASLE) {
547 DRM_DEBUG_DRIVER("ASLE supported\n");
548 opregion->asle = base + OPREGION_ASLE_OFFSET;
549 }
550
551 return 0;
552
553 err_out:
554 iounmap(base);
555 return err;
556 }
557