Loading...
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 "drmP.h"
35#include "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
55struct 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 */
67struct 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 */
89struct 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 */
97struct 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
151static 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 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 iowrite32((bclp*0x64)/0xff | ASLE_CBLV_VALID, &asle->cblv);
167
168 return 0;
169}
170
171static 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
178static 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
191static 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
200void intel_opregion_asle_intr(struct drm_device *dev)
201{
202 struct drm_i915_private *dev_priv = dev->dev_private;
203 struct opregion_asle __iomem *asle = dev_priv->opregion.asle;
204 u32 asle_stat = 0;
205 u32 asle_req;
206
207 if (!asle)
208 return;
209
210 asle_req = ioread32(&asle->aslc) & ASLE_REQ_MSK;
211
212 if (!asle_req) {
213 DRM_DEBUG_DRIVER("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, ioread32(&asle->alsi));
219
220 if (asle_req & ASLE_SET_BACKLIGHT)
221 asle_stat |= asle_set_backlight(dev, ioread32(&asle->bclp));
222
223 if (asle_req & ASLE_SET_PFIT)
224 asle_stat |= asle_set_pfit(dev, ioread32(&asle->pfit));
225
226 if (asle_req & ASLE_SET_PWM_FREQ)
227 asle_stat |= asle_set_pwm_freq(dev, ioread32(&asle->pfmb));
228
229 iowrite32(asle_stat, &asle->aslc);
230}
231
232void intel_opregion_gse_intr(struct drm_device *dev)
233{
234 struct drm_i915_private *dev_priv = dev->dev_private;
235 struct opregion_asle __iomem *asle = dev_priv->opregion.asle;
236 u32 asle_stat = 0;
237 u32 asle_req;
238
239 if (!asle)
240 return;
241
242 asle_req = ioread32(&asle->aslc) & ASLE_REQ_MSK;
243
244 if (!asle_req) {
245 DRM_DEBUG_DRIVER("non asle set request??\n");
246 return;
247 }
248
249 if (asle_req & ASLE_SET_ALS_ILLUM) {
250 DRM_DEBUG_DRIVER("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, ioread32(&asle->bclp));
256
257 if (asle_req & ASLE_SET_PFIT) {
258 DRM_DEBUG_DRIVER("Pfit is not supported\n");
259 asle_stat |= ASLE_PFIT_FAILED;
260 }
261
262 if (asle_req & ASLE_SET_PWM_FREQ) {
263 DRM_DEBUG_DRIVER("PWM freq is not supported\n");
264 asle_stat |= ASLE_PWM_FREQ_FAILED;
265 }
266
267 iowrite32(asle_stat, &asle->aslc);
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
274void intel_opregion_enable_asle(struct drm_device *dev)
275{
276 struct drm_i915_private *dev_priv = dev->dev_private;
277 struct opregion_asle __iomem *asle = dev_priv->opregion.asle;
278
279 if (asle) {
280 if (IS_MOBILE(dev))
281 intel_enable_asle(dev);
282
283 iowrite32(ASLE_ALS_EN | ASLE_BLC_EN | ASLE_PFIT_EN |
284 ASLE_PFMB_EN,
285 &asle->tche);
286 iowrite32(1, &asle->ardy);
287 }
288}
289
290#define ACPI_EV_DISPLAY_SWITCH (1<<0)
291#define ACPI_EV_LID (1<<1)
292#define ACPI_EV_DOCK (1<<2)
293
294static struct intel_opregion *system_opregion;
295
296static 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
304 struct opregion_acpi __iomem *acpi;
305 struct acpi_bus_event *event = data;
306 int ret = NOTIFY_OK;
307
308 if (strcmp(event->device_class, ACPI_VIDEO_CLASS) != 0)
309 return NOTIFY_DONE;
310
311 if (!system_opregion)
312 return NOTIFY_DONE;
313
314 acpi = system_opregion->acpi;
315
316 if (event->type == 0x80 &&
317 (ioread32(&acpi->cevt) & 1) == 0)
318 ret = NOTIFY_BAD;
319
320 iowrite32(0, &acpi->csts);
321
322 return ret;
323}
324
325static struct notifier_block intel_opregion_notifier = {
326 .notifier_call = intel_opregion_video_event,
327};
328
329/*
330 * Initialise the DIDL field in opregion. This passes a list of devices to
331 * the firmware. Values are defined by section B.4.2 of the ACPI specification
332 * (version 3)
333 */
334
335static void intel_didl_outputs(struct drm_device *dev)
336{
337 struct drm_i915_private *dev_priv = dev->dev_private;
338 struct intel_opregion *opregion = &dev_priv->opregion;
339 struct drm_connector *connector;
340 acpi_handle handle;
341 struct acpi_device *acpi_dev, *acpi_cdev, *acpi_video_bus = NULL;
342 unsigned long long device_id;
343 acpi_status status;
344 u32 temp;
345 int i = 0;
346
347 handle = DEVICE_ACPI_HANDLE(&dev->pdev->dev);
348 if (!handle || ACPI_FAILURE(acpi_bus_get_device(handle, &acpi_dev)))
349 return;
350
351 if (acpi_is_video_device(acpi_dev))
352 acpi_video_bus = acpi_dev;
353 else {
354 list_for_each_entry(acpi_cdev, &acpi_dev->children, node) {
355 if (acpi_is_video_device(acpi_cdev)) {
356 acpi_video_bus = acpi_cdev;
357 break;
358 }
359 }
360 }
361
362 if (!acpi_video_bus) {
363 pr_warn("No ACPI video bus found\n");
364 return;
365 }
366
367 list_for_each_entry(acpi_cdev, &acpi_video_bus->children, node) {
368 if (i >= 8) {
369 dev_printk(KERN_ERR, &dev->pdev->dev,
370 "More than 8 outputs detected\n");
371 return;
372 }
373 status =
374 acpi_evaluate_integer(acpi_cdev->handle, "_ADR",
375 NULL, &device_id);
376 if (ACPI_SUCCESS(status)) {
377 if (!device_id)
378 goto blind_set;
379 iowrite32((u32)(device_id & 0x0f0f),
380 &opregion->acpi->didl[i]);
381 i++;
382 }
383 }
384
385end:
386 /* If fewer than 8 outputs, the list must be null terminated */
387 if (i < 8)
388 iowrite32(0, &opregion->acpi->didl[i]);
389 return;
390
391blind_set:
392 i = 0;
393 list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
394 int output_type = ACPI_OTHER_OUTPUT;
395 if (i >= 8) {
396 dev_printk(KERN_ERR, &dev->pdev->dev,
397 "More than 8 outputs detected\n");
398 return;
399 }
400 switch (connector->connector_type) {
401 case DRM_MODE_CONNECTOR_VGA:
402 case DRM_MODE_CONNECTOR_DVIA:
403 output_type = ACPI_VGA_OUTPUT;
404 break;
405 case DRM_MODE_CONNECTOR_Composite:
406 case DRM_MODE_CONNECTOR_SVIDEO:
407 case DRM_MODE_CONNECTOR_Component:
408 case DRM_MODE_CONNECTOR_9PinDIN:
409 output_type = ACPI_TV_OUTPUT;
410 break;
411 case DRM_MODE_CONNECTOR_DVII:
412 case DRM_MODE_CONNECTOR_DVID:
413 case DRM_MODE_CONNECTOR_DisplayPort:
414 case DRM_MODE_CONNECTOR_HDMIA:
415 case DRM_MODE_CONNECTOR_HDMIB:
416 output_type = ACPI_DIGITAL_OUTPUT;
417 break;
418 case DRM_MODE_CONNECTOR_LVDS:
419 output_type = ACPI_LVDS_OUTPUT;
420 break;
421 }
422 temp = ioread32(&opregion->acpi->didl[i]);
423 iowrite32(temp | (1<<31) | output_type | i,
424 &opregion->acpi->didl[i]);
425 i++;
426 }
427 goto end;
428}
429
430void intel_opregion_init(struct drm_device *dev)
431{
432 struct drm_i915_private *dev_priv = dev->dev_private;
433 struct intel_opregion *opregion = &dev_priv->opregion;
434
435 if (!opregion->header)
436 return;
437
438 if (opregion->acpi) {
439 if (drm_core_check_feature(dev, DRIVER_MODESET))
440 intel_didl_outputs(dev);
441
442 /* Notify BIOS we are ready to handle ACPI video ext notifs.
443 * Right now, all the events are handled by the ACPI video module.
444 * We don't actually need to do anything with them. */
445 iowrite32(0, &opregion->acpi->csts);
446 iowrite32(1, &opregion->acpi->drdy);
447
448 system_opregion = opregion;
449 register_acpi_notifier(&intel_opregion_notifier);
450 }
451
452 if (opregion->asle)
453 intel_opregion_enable_asle(dev);
454}
455
456void intel_opregion_fini(struct drm_device *dev)
457{
458 struct drm_i915_private *dev_priv = dev->dev_private;
459 struct intel_opregion *opregion = &dev_priv->opregion;
460
461 if (!opregion->header)
462 return;
463
464 if (opregion->acpi) {
465 iowrite32(0, &opregion->acpi->drdy);
466
467 system_opregion = NULL;
468 unregister_acpi_notifier(&intel_opregion_notifier);
469 }
470
471 /* just clear all opregion memory pointers now */
472 iounmap(opregion->header);
473 opregion->header = NULL;
474 opregion->acpi = NULL;
475 opregion->swsci = NULL;
476 opregion->asle = NULL;
477 opregion->vbt = NULL;
478}
479#endif
480
481int intel_opregion_setup(struct drm_device *dev)
482{
483 struct drm_i915_private *dev_priv = dev->dev_private;
484 struct intel_opregion *opregion = &dev_priv->opregion;
485 void __iomem *base;
486 u32 asls, mboxes;
487 char buf[sizeof(OPREGION_SIGNATURE)];
488 int err = 0;
489
490 pci_read_config_dword(dev->pdev, PCI_ASLS, &asls);
491 DRM_DEBUG_DRIVER("graphic opregion physical addr: 0x%x\n", asls);
492 if (asls == 0) {
493 DRM_DEBUG_DRIVER("ACPI OpRegion not supported!\n");
494 return -ENOTSUPP;
495 }
496
497 base = acpi_os_ioremap(asls, OPREGION_SIZE);
498 if (!base)
499 return -ENOMEM;
500
501 memcpy_fromio(buf, base, sizeof(buf));
502
503 if (memcmp(buf, OPREGION_SIGNATURE, 16)) {
504 DRM_DEBUG_DRIVER("opregion signature mismatch\n");
505 err = -EINVAL;
506 goto err_out;
507 }
508 opregion->header = base;
509 opregion->vbt = base + OPREGION_VBT_OFFSET;
510
511 opregion->lid_state = base + ACPI_CLID;
512
513 mboxes = ioread32(&opregion->header->mboxes);
514 if (mboxes & MBOX_ACPI) {
515 DRM_DEBUG_DRIVER("Public ACPI methods supported\n");
516 opregion->acpi = base + OPREGION_ACPI_OFFSET;
517 }
518
519 if (mboxes & MBOX_SWSCI) {
520 DRM_DEBUG_DRIVER("SWSCI supported\n");
521 opregion->swsci = base + OPREGION_SWSCI_OFFSET;
522 }
523 if (mboxes & MBOX_ASLE) {
524 DRM_DEBUG_DRIVER("ASLE supported\n");
525 opregion->asle = base + OPREGION_ASLE_OFFSET;
526 }
527
528 return 0;
529
530err_out:
531 iounmap(base);
532 return err;
533}