2 * Copyright 2008 Intel Corporation <hong.liu@intel.com>
3 * Copyright 2008 Red Hat <mjg@redhat.com>
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:
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.
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
26 * $FreeBSD: src/sys/dev/drm2/i915/intel_opregion.c,v 1.1 2012/05/22 11:07:44 kib Exp $
30 #include <drm/i915_drm.h>
32 #include "intel_drv.h"
37 #define OPREGION_HEADER_OFFSET 0
38 #define OPREGION_ACPI_OFFSET 0x100
39 #define ACPI_CLID 0x01ac /* current lid state indicator */
40 #define ACPI_CDCK 0x01b0 /* current docking state indicator */
41 #define OPREGION_SWSCI_OFFSET 0x200
42 #define OPREGION_ASLE_OFFSET 0x300
43 #define OPREGION_VBT_OFFSET 0x400
45 #define OPREGION_SIGNATURE "IntelGraphicsMem"
46 #define MBOX_ACPI (1<<0)
47 #define MBOX_SWSCI (1<<1)
48 #define MBOX_ASLE (1<<2)
50 struct opregion_header {
59 } __attribute__((packed));
61 /* OpRegion mailbox #1: public ACPI methods */
62 struct opregion_acpi {
63 u32 drdy; /* driver readiness */
64 u32 csts; /* notification status */
65 u32 cevt; /* current event */
67 u32 didl[8]; /* supported display devices ID list */
68 u32 cpdl[8]; /* currently presented display list */
69 u32 cadl[8]; /* currently active display list */
70 u32 nadl[8]; /* next active devices list */
71 u32 aslp; /* ASL sleep time-out */
72 u32 tidx; /* toggle table index */
73 u32 chpd; /* current hotplug enable indicator */
74 u32 clid; /* current lid state*/
75 u32 cdck; /* current docking state */
76 u32 sxsw; /* Sx state resume */
77 u32 evts; /* ASL supported events */
78 u32 cnot; /* current OS notification */
79 u32 nrdy; /* driver status */
81 } __attribute__((packed));
83 /* OpRegion mailbox #2: SWSCI */
84 struct opregion_swsci {
85 u32 scic; /* SWSCI command|status|data */
86 u32 parm; /* command parameters */
87 u32 dslp; /* driver sleep time-out */
89 } __attribute__((packed));
91 /* OpRegion mailbox #3: ASLE */
92 struct opregion_asle {
93 u32 ardy; /* driver readiness */
94 u32 aslc; /* ASLE interrupt command */
95 u32 tche; /* technology enabled indicator */
96 u32 alsi; /* current ALS illuminance reading */
97 u32 bclp; /* backlight brightness to set */
98 u32 pfit; /* panel fitting state */
99 u32 cblv; /* current brightness level */
100 u16 bclm[20]; /* backlight level duty cycle mapping table */
101 u32 cpfm; /* current panel fitting mode */
102 u32 epfm; /* enabled panel fitting modes */
103 u8 plut[74]; /* panel LUT and identifier */
104 u32 pfmb; /* PWM freq and min brightness */
106 } __attribute__((packed));
108 /* ASLE irq request bits */
109 #define ASLE_SET_ALS_ILLUM (1 << 0)
110 #define ASLE_SET_BACKLIGHT (1 << 1)
111 #define ASLE_SET_PFIT (1 << 2)
112 #define ASLE_SET_PWM_FREQ (1 << 3)
113 #define ASLE_REQ_MSK 0xf
115 /* response bits of ASLE irq request */
116 #define ASLE_ALS_ILLUM_FAILED (1<<10)
117 #define ASLE_BACKLIGHT_FAILED (1<<12)
118 #define ASLE_PFIT_FAILED (1<<14)
119 #define ASLE_PWM_FREQ_FAILED (1<<16)
121 /* ASLE backlight brightness to set */
122 #define ASLE_BCLP_VALID (1<<31)
123 #define ASLE_BCLP_MSK (~(1<<31))
125 /* ASLE panel fitting request */
126 #define ASLE_PFIT_VALID (1<<31)
127 #define ASLE_PFIT_CENTER (1<<0)
128 #define ASLE_PFIT_STRETCH_TEXT (1<<1)
129 #define ASLE_PFIT_STRETCH_GFX (1<<2)
131 /* PWM frequency and minimum brightness */
132 #define ASLE_PFMB_BRIGHTNESS_MASK (0xff)
133 #define ASLE_PFMB_BRIGHTNESS_VALID (1<<8)
134 #define ASLE_PFMB_PWM_MASK (0x7ffffe00)
135 #define ASLE_PFMB_PWM_VALID (1<<31)
137 #define ASLE_CBLV_VALID (1<<31)
139 #define ACPI_OTHER_OUTPUT (0<<8)
140 #define ACPI_VGA_OUTPUT (1<<8)
141 #define ACPI_TV_OUTPUT (2<<8)
142 #define ACPI_DIGITAL_OUTPUT (3<<8)
143 #define ACPI_LVDS_OUTPUT (4<<8)
146 static u32 asle_set_backlight(struct drm_device *dev, u32 bclp)
148 struct drm_i915_private *dev_priv = dev->dev_private;
149 struct opregion_asle *asle = dev_priv->opregion.asle;
152 if (!(bclp & ASLE_BCLP_VALID))
153 return ASLE_BACKLIGHT_FAILED;
155 bclp &= ASLE_BCLP_MSK;
157 return ASLE_BACKLIGHT_FAILED;
159 max = intel_panel_get_max_backlight(dev);
160 intel_panel_set_backlight(dev, bclp * max / 255);
161 asle->cblv = (bclp*0x64)/0xff | ASLE_CBLV_VALID;
166 static u32 asle_set_als_illum(struct drm_device *dev, u32 alsi)
168 /* alsi is the current ALS reading in lux. 0 indicates below sensor
169 range, 0xffff indicates above sensor range. 1-0xfffe are valid */
173 static u32 asle_set_pwm_freq(struct drm_device *dev, u32 pfmb)
175 struct drm_i915_private *dev_priv = dev->dev_private;
176 if (pfmb & ASLE_PFMB_PWM_VALID) {
177 u32 blc_pwm_ctl = I915_READ(BLC_PWM_CTL);
178 u32 pwm = pfmb & ASLE_PFMB_PWM_MASK;
179 blc_pwm_ctl &= BACKLIGHT_DUTY_CYCLE_MASK;
181 /* FIXME - what do we do with the PWM? */
186 static u32 asle_set_pfit(struct drm_device *dev, u32 pfit)
188 /* Panel fitting is currently controlled by the X code, so this is a
189 noop until modesetting support works fully */
190 if (!(pfit & ASLE_PFIT_VALID))
191 return ASLE_PFIT_FAILED;
195 void intel_opregion_asle_intr(struct drm_device *dev)
197 struct drm_i915_private *dev_priv = dev->dev_private;
198 struct opregion_asle *asle = dev_priv->opregion.asle;
205 asle_req = asle->aslc & ASLE_REQ_MSK;
208 DRM_DEBUG("non asle set request??\n");
212 if (asle_req & ASLE_SET_ALS_ILLUM)
213 asle_stat |= asle_set_als_illum(dev, asle->alsi);
215 if (asle_req & ASLE_SET_BACKLIGHT)
216 asle_stat |= asle_set_backlight(dev, asle->bclp);
218 if (asle_req & ASLE_SET_PFIT)
219 asle_stat |= asle_set_pfit(dev, asle->pfit);
221 if (asle_req & ASLE_SET_PWM_FREQ)
222 asle_stat |= asle_set_pwm_freq(dev, asle->pfmb);
224 asle->aslc = asle_stat;
227 void intel_opregion_gse_intr(struct drm_device *dev)
229 struct drm_i915_private *dev_priv = dev->dev_private;
230 struct opregion_asle *asle = dev_priv->opregion.asle;
237 asle_req = asle->aslc & ASLE_REQ_MSK;
240 DRM_DEBUG("non asle set request??\n");
244 if (asle_req & ASLE_SET_ALS_ILLUM) {
245 DRM_DEBUG("Illum is not supported\n");
246 asle_stat |= ASLE_ALS_ILLUM_FAILED;
249 if (asle_req & ASLE_SET_BACKLIGHT)
250 asle_stat |= asle_set_backlight(dev, asle->bclp);
252 if (asle_req & ASLE_SET_PFIT) {
253 DRM_DEBUG("Pfit is not supported\n");
254 asle_stat |= ASLE_PFIT_FAILED;
257 if (asle_req & ASLE_SET_PWM_FREQ) {
258 DRM_DEBUG("PWM freq is not supported\n");
259 asle_stat |= ASLE_PWM_FREQ_FAILED;
262 asle->aslc = asle_stat;
264 #define ASLE_ALS_EN (1<<0)
265 #define ASLE_BLC_EN (1<<1)
266 #define ASLE_PFIT_EN (1<<2)
267 #define ASLE_PFMB_EN (1<<3)
269 void intel_opregion_enable_asle(struct drm_device *dev)
271 struct drm_i915_private *dev_priv = dev->dev_private;
272 struct opregion_asle *asle = dev_priv->opregion.asle;
276 intel_enable_asle(dev);
278 asle->tche = ASLE_ALS_EN | ASLE_BLC_EN | ASLE_PFIT_EN |
284 #define ACPI_EV_DISPLAY_SWITCH (1<<0)
285 #define ACPI_EV_LID (1<<1)
286 #define ACPI_EV_DOCK (1<<2)
288 static struct intel_opregion *system_opregion;
290 static int intel_opregion_video_event(struct notifier_block *nb,
291 unsigned long val, void *data)
293 /* The only video events relevant to opregion are 0x80. These indicate
294 either a docking event, lid switch or display switch request. In
295 Linux, these are handled by the dock, button and video drivers.
297 struct opregion_acpi *acpi;
298 struct acpi_bus_event *event = data;
301 if (strcmp(event->device_class, ACPI_VIDEO_CLASS) != 0)
304 if (!system_opregion)
307 acpi = system_opregion->acpi;
309 if (event->type == 0x80 && !(acpi->cevt & 0x1))
317 static struct notifier_block intel_opregion_notifier = {
318 .notifier_call = intel_opregion_video_event,
322 * Initialise the DIDL field in opregion. This passes a list of devices to
323 * the firmware. Values are defined by section B.4.2 of the ACPI specification
327 static void intel_didl_outputs(struct drm_device *dev)
329 struct drm_i915_private *dev_priv = dev->dev_private;
330 struct intel_opregion *opregion = &dev_priv->opregion;
331 struct drm_connector *connector;
333 struct acpi_device *acpi_dev, *acpi_cdev, *acpi_video_bus = NULL;
334 unsigned long long device_id;
338 handle = DEVICE_ACPI_HANDLE(&dev->pdev->dev);
339 if (!handle || ACPI_FAILURE(acpi_bus_get_device(handle, &acpi_dev)))
342 if (acpi_is_video_device(acpi_dev))
343 acpi_video_bus = acpi_dev;
345 list_for_each_entry(acpi_cdev, &acpi_dev->children, node) {
346 if (acpi_is_video_device(acpi_cdev)) {
347 acpi_video_bus = acpi_cdev;
353 if (!acpi_video_bus) {
354 printk(KERN_WARNING "No ACPI video bus found\n");
358 list_for_each_entry(acpi_cdev, &acpi_video_bus->children, node) {
360 dev_printk(KERN_ERR, &dev->pdev->dev,
361 "More than 8 outputs detected\n");
365 acpi_evaluate_integer(acpi_cdev->handle, "_ADR",
367 if (ACPI_SUCCESS(status)) {
370 opregion->acpi->didl[i] = (u32)(device_id & 0x0f0f);
376 /* If fewer than 8 outputs, the list must be null terminated */
378 opregion->acpi->didl[i] = 0;
383 list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
384 int output_type = ACPI_OTHER_OUTPUT;
386 device_printf(dev->dev,
387 "More than 8 outputs detected\n");
390 switch (connector->connector_type) {
391 case DRM_MODE_CONNECTOR_VGA:
392 case DRM_MODE_CONNECTOR_DVIA:
393 output_type = ACPI_VGA_OUTPUT;
395 case DRM_MODE_CONNECTOR_Composite:
396 case DRM_MODE_CONNECTOR_SVIDEO:
397 case DRM_MODE_CONNECTOR_Component:
398 case DRM_MODE_CONNECTOR_9PinDIN:
399 output_type = ACPI_TV_OUTPUT;
401 case DRM_MODE_CONNECTOR_DVII:
402 case DRM_MODE_CONNECTOR_DVID:
403 case DRM_MODE_CONNECTOR_DisplayPort:
404 case DRM_MODE_CONNECTOR_HDMIA:
405 case DRM_MODE_CONNECTOR_HDMIB:
406 output_type = ACPI_DIGITAL_OUTPUT;
408 case DRM_MODE_CONNECTOR_LVDS:
409 output_type = ACPI_LVDS_OUTPUT;
412 opregion->acpi->didl[i] |= (1<<31) | output_type | i;
418 void intel_opregion_init(struct drm_device *dev)
420 struct drm_i915_private *dev_priv = dev->dev_private;
421 struct intel_opregion *opregion = &dev_priv->opregion;
423 if (!opregion->header)
426 if (opregion->acpi) {
427 if (drm_core_check_feature(dev, DRIVER_MODESET))
428 intel_didl_outputs(dev);
430 /* Notify BIOS we are ready to handle ACPI video ext notifs.
431 * Right now, all the events are handled by the ACPI video module.
432 * We don't actually need to do anything with them. */
433 opregion->acpi->csts = 0;
434 opregion->acpi->drdy = 1;
436 system_opregion = opregion;
437 register_acpi_notifier(&intel_opregion_notifier);
441 intel_opregion_enable_asle(dev);
444 void intel_opregion_fini(struct drm_device *dev)
446 struct drm_i915_private *dev_priv = dev->dev_private;
447 struct intel_opregion *opregion = &dev_priv->opregion;
449 if (!opregion->header)
452 if (opregion->acpi) {
453 opregion->acpi->drdy = 0;
455 system_opregion = NULL;
456 unregister_acpi_notifier(&intel_opregion_notifier);
459 /* just clear all opregion memory pointers now */
460 iounmap(opregion->header);
461 opregion->header = NULL;
462 opregion->acpi = NULL;
463 opregion->swsci = NULL;
464 opregion->asle = NULL;
465 opregion->vbt = NULL;
469 intel_opregion_init(struct drm_device *dev)
476 intel_opregion_fini(struct drm_device *dev)
478 struct drm_i915_private *dev_priv;
479 struct intel_opregion *opregion;
481 dev_priv = dev->dev_private;
482 opregion = &dev_priv->opregion;
484 if (opregion->header == NULL)
487 pmap_unmapdev((vm_offset_t)opregion->header, OPREGION_SIZE);
488 opregion->header = NULL;
489 opregion->acpi = NULL;
490 opregion->swsci = NULL;
491 opregion->asle = NULL;
492 opregion->vbt = NULL;
496 int intel_opregion_setup(struct drm_device *dev)
498 struct drm_i915_private *dev_priv = dev->dev_private;
499 struct intel_opregion *opregion = &dev_priv->opregion;
504 asls = pci_read_config(dev->dev, PCI_ASLS, 4);
505 DRM_DEBUG("graphic opregion physical addr: 0x%x\n", asls);
507 DRM_DEBUG("ACPI OpRegion not supported!\n");
511 base = (void *)pmap_mapbios(asls, OPREGION_SIZE);
515 if (memcmp(base, OPREGION_SIGNATURE, 16)) {
516 DRM_DEBUG("opregion signature mismatch\n");
520 opregion->header = (struct opregion_header *)base;
521 opregion->vbt = base + OPREGION_VBT_OFFSET;
523 opregion->lid_state = (u32 *)(base + ACPI_CLID);
525 mboxes = opregion->header->mboxes;
526 if (mboxes & MBOX_ACPI) {
527 DRM_DEBUG("Public ACPI methods supported\n");
528 opregion->acpi = (struct opregion_acpi *)(base +
529 OPREGION_ACPI_OFFSET);
532 if (mboxes & MBOX_SWSCI) {
533 DRM_DEBUG("SWSCI supported\n");
534 opregion->swsci = (struct opregion_swsci *)(base +
535 OPREGION_SWSCI_OFFSET);
537 if (mboxes & MBOX_ASLE) {
538 DRM_DEBUG("ASLE supported\n");
539 opregion->asle = (struct opregion_asle *)(base +
540 OPREGION_ASLE_OFFSET);
546 pmap_unmapdev((vm_offset_t)base, OPREGION_SIZE);