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
29 #include <drm/i915_drm.h>
31 #include "intel_drv.h"
38 #define OPREGION_HEADER_OFFSET 0
39 #define OPREGION_ACPI_OFFSET 0x100
40 #define ACPI_CLID 0x01ac /* current lid state indicator */
41 #define ACPI_CDCK 0x01b0 /* current docking state indicator */
42 #define OPREGION_SWSCI_OFFSET 0x200
43 #define OPREGION_ASLE_OFFSET 0x300
44 #define OPREGION_VBT_OFFSET 0x400
46 #define OPREGION_SIGNATURE "IntelGraphicsMem"
47 #define MBOX_ACPI (1<<0)
48 #define MBOX_SWSCI (1<<1)
49 #define MBOX_ASLE (1<<2)
51 struct opregion_header {
60 } __attribute__((packed));
62 /* OpRegion mailbox #1: public ACPI methods */
63 struct opregion_acpi {
64 u32 drdy; /* driver readiness */
65 u32 csts; /* notification status */
66 u32 cevt; /* current event */
68 u32 didl[8]; /* supported display devices ID list */
69 u32 cpdl[8]; /* currently presented display list */
70 u32 cadl[8]; /* currently active display list */
71 u32 nadl[8]; /* next active devices list */
72 u32 aslp; /* ASL sleep time-out */
73 u32 tidx; /* toggle table index */
74 u32 chpd; /* current hotplug enable indicator */
75 u32 clid; /* current lid state*/
76 u32 cdck; /* current docking state */
77 u32 sxsw; /* Sx state resume */
78 u32 evts; /* ASL supported events */
79 u32 cnot; /* current OS notification */
80 u32 nrdy; /* driver status */
82 } __attribute__((packed));
84 /* OpRegion mailbox #2: SWSCI */
85 struct opregion_swsci {
86 u32 scic; /* SWSCI command|status|data */
87 u32 parm; /* command parameters */
88 u32 dslp; /* driver sleep time-out */
90 } __attribute__((packed));
92 /* OpRegion mailbox #3: ASLE */
93 struct opregion_asle {
94 u32 ardy; /* driver readiness */
95 u32 aslc; /* ASLE interrupt command */
96 u32 tche; /* technology enabled indicator */
97 u32 alsi; /* current ALS illuminance reading */
98 u32 bclp; /* backlight brightness to set */
99 u32 pfit; /* panel fitting state */
100 u32 cblv; /* current brightness level */
101 u16 bclm[20]; /* backlight level duty cycle mapping table */
102 u32 cpfm; /* current panel fitting mode */
103 u32 epfm; /* enabled panel fitting modes */
104 u8 plut[74]; /* panel LUT and identifier */
105 u32 pfmb; /* PWM freq and min brightness */
107 } __attribute__((packed));
109 /* ASLE irq request bits */
110 #define ASLE_SET_ALS_ILLUM (1 << 0)
111 #define ASLE_SET_BACKLIGHT (1 << 1)
112 #define ASLE_SET_PFIT (1 << 2)
113 #define ASLE_SET_PWM_FREQ (1 << 3)
114 #define ASLE_REQ_MSK 0xf
116 /* response bits of ASLE irq request */
117 #define ASLE_ALS_ILLUM_FAILED (1<<10)
118 #define ASLE_BACKLIGHT_FAILED (1<<12)
119 #define ASLE_PFIT_FAILED (1<<14)
120 #define ASLE_PWM_FREQ_FAILED (1<<16)
122 /* ASLE backlight brightness to set */
123 #define ASLE_BCLP_VALID (1<<31)
124 #define ASLE_BCLP_MSK (~(1<<31))
126 /* ASLE panel fitting request */
127 #define ASLE_PFIT_VALID (1<<31)
128 #define ASLE_PFIT_CENTER (1<<0)
129 #define ASLE_PFIT_STRETCH_TEXT (1<<1)
130 #define ASLE_PFIT_STRETCH_GFX (1<<2)
132 /* PWM frequency and minimum brightness */
133 #define ASLE_PFMB_BRIGHTNESS_MASK (0xff)
134 #define ASLE_PFMB_BRIGHTNESS_VALID (1<<8)
135 #define ASLE_PFMB_PWM_MASK (0x7ffffe00)
136 #define ASLE_PFMB_PWM_VALID (1<<31)
138 #define ASLE_CBLV_VALID (1<<31)
140 #define ACPI_OTHER_OUTPUT (0<<8)
141 #define ACPI_VGA_OUTPUT (1<<8)
142 #define ACPI_TV_OUTPUT (2<<8)
143 #define ACPI_DIGITAL_OUTPUT (3<<8)
144 #define ACPI_LVDS_OUTPUT (4<<8)
147 static u32 asle_set_backlight(struct drm_device *dev, u32 bclp)
149 struct drm_i915_private *dev_priv = dev->dev_private;
150 struct opregion_asle __iomem *asle = dev_priv->opregion.asle;
153 DRM_DEBUG_DRIVER("bclp = 0x%08x\n", bclp);
155 if (!(bclp & ASLE_BCLP_VALID))
156 return ASLE_BACKLIGHT_FAILED;
158 bclp &= ASLE_BCLP_MSK;
160 return ASLE_BACKLIGHT_FAILED;
162 max = intel_panel_get_max_backlight(dev);
163 intel_panel_set_backlight(dev, bclp * max / 255);
164 iowrite32((bclp*0x64)/0xff | ASLE_CBLV_VALID, &asle->cblv);
169 static u32 asle_set_als_illum(struct drm_device *dev, u32 alsi)
171 /* alsi is the current ALS reading in lux. 0 indicates below sensor
172 range, 0xffff indicates above sensor range. 1-0xfffe are valid */
176 static u32 asle_set_pwm_freq(struct drm_device *dev, u32 pfmb)
178 struct drm_i915_private *dev_priv = dev->dev_private;
179 if (pfmb & ASLE_PFMB_PWM_VALID) {
180 u32 blc_pwm_ctl = I915_READ(BLC_PWM_CTL);
181 u32 pwm = pfmb & ASLE_PFMB_PWM_MASK;
182 blc_pwm_ctl &= BACKLIGHT_DUTY_CYCLE_MASK;
184 /* FIXME - what do we do with the PWM? */
189 static u32 asle_set_pfit(struct drm_device *dev, u32 pfit)
191 /* Panel fitting is currently controlled by the X code, so this is a
192 noop until modesetting support works fully */
193 if (!(pfit & ASLE_PFIT_VALID))
194 return ASLE_PFIT_FAILED;
198 void intel_opregion_asle_intr(struct drm_device *dev)
200 struct drm_i915_private *dev_priv = dev->dev_private;
201 struct opregion_asle __iomem *asle = dev_priv->opregion.asle;
208 asle_req = ioread32(&asle->aslc) & ASLE_REQ_MSK;
211 DRM_DEBUG_DRIVER("non asle set request??\n");
215 if (asle_req & ASLE_SET_ALS_ILLUM)
216 asle_stat |= asle_set_als_illum(dev, ioread32(&asle->alsi));
218 if (asle_req & ASLE_SET_BACKLIGHT)
219 asle_stat |= asle_set_backlight(dev, ioread32(&asle->bclp));
221 if (asle_req & ASLE_SET_PFIT)
222 asle_stat |= asle_set_pfit(dev, ioread32(&asle->pfit));
224 if (asle_req & ASLE_SET_PWM_FREQ)
225 asle_stat |= asle_set_pwm_freq(dev, ioread32(&asle->pfmb));
227 iowrite32(asle_stat, &asle->aslc);
230 void intel_opregion_gse_intr(struct drm_device *dev)
232 struct drm_i915_private *dev_priv = dev->dev_private;
233 struct opregion_asle __iomem *asle = dev_priv->opregion.asle;
240 asle_req = ioread32(&asle->aslc) & ASLE_REQ_MSK;
243 DRM_DEBUG_DRIVER("non asle set request??\n");
247 if (asle_req & ASLE_SET_ALS_ILLUM) {
248 DRM_DEBUG_DRIVER("Illum is not supported\n");
249 asle_stat |= ASLE_ALS_ILLUM_FAILED;
252 if (asle_req & ASLE_SET_BACKLIGHT)
253 asle_stat |= asle_set_backlight(dev, ioread32(&asle->bclp));
255 if (asle_req & ASLE_SET_PFIT) {
256 DRM_DEBUG_DRIVER("Pfit is not supported\n");
257 asle_stat |= ASLE_PFIT_FAILED;
260 if (asle_req & ASLE_SET_PWM_FREQ) {
261 DRM_DEBUG_DRIVER("PWM freq is not supported\n");
262 asle_stat |= ASLE_PWM_FREQ_FAILED;
265 iowrite32(asle_stat, &asle->aslc);
267 #define ASLE_ALS_EN (1<<0)
268 #define ASLE_BLC_EN (1<<1)
269 #define ASLE_PFIT_EN (1<<2)
270 #define ASLE_PFMB_EN (1<<3)
272 void intel_opregion_enable_asle(struct drm_device *dev)
274 struct drm_i915_private *dev_priv = dev->dev_private;
275 struct opregion_asle __iomem *asle = dev_priv->opregion.asle;
279 intel_enable_asle(dev);
281 iowrite32(ASLE_ALS_EN | ASLE_BLC_EN | ASLE_PFIT_EN |
284 iowrite32(1, &asle->ardy);
288 #define ACPI_EV_DISPLAY_SWITCH (1<<0)
289 #define ACPI_EV_LID (1<<1)
290 #define ACPI_EV_DOCK (1<<2)
292 static struct intel_opregion *system_opregion;
294 static int intel_opregion_video_event(struct notifier_block *nb,
295 unsigned long val, void *data)
297 /* The only video events relevant to opregion are 0x80. These indicate
298 either a docking event, lid switch or display switch request. In
299 Linux, these are handled by the dock, button and video drivers.
302 struct opregion_acpi __iomem *acpi;
303 struct acpi_bus_event *event = data;
306 if (strcmp(event->device_class, ACPI_VIDEO_CLASS) != 0)
309 if (!system_opregion)
312 acpi = system_opregion->acpi;
314 if (event->type == 0x80 &&
315 (ioread32(&acpi->cevt) & 1) == 0)
318 iowrite32(0, &acpi->csts);
323 static struct notifier_block intel_opregion_notifier = {
324 .notifier_call = intel_opregion_video_event,
328 * Initialise the DIDL field in opregion. This passes a list of devices to
329 * the firmware. Values are defined by section B.4.2 of the ACPI specification
333 static void intel_didl_outputs(struct drm_device *dev)
335 struct drm_i915_private *dev_priv = dev->dev_private;
336 struct intel_opregion *opregion = &dev_priv->opregion;
337 struct drm_connector *connector;
339 struct acpi_device *acpi_dev, *acpi_cdev, *acpi_video_bus = NULL;
340 unsigned long long device_id;
345 handle = DEVICE_ACPI_HANDLE(&dev->pdev->dev);
346 if (!handle || ACPI_FAILURE(acpi_bus_get_device(handle, &acpi_dev)))
349 if (acpi_is_video_device(acpi_dev))
350 acpi_video_bus = acpi_dev;
352 list_for_each_entry(acpi_cdev, &acpi_dev->children, node) {
353 if (acpi_is_video_device(acpi_cdev)) {
354 acpi_video_bus = acpi_cdev;
360 if (!acpi_video_bus) {
361 pr_warn("No ACPI video bus found\n");
365 list_for_each_entry(acpi_cdev, &acpi_video_bus->children, node) {
367 dev_printk(KERN_ERR, &dev->pdev->dev,
368 "More than 8 outputs detected\n");
372 acpi_evaluate_integer(acpi_cdev->handle, "_ADR",
374 if (ACPI_SUCCESS(status)) {
377 iowrite32((u32)(device_id & 0x0f0f),
378 &opregion->acpi->didl[i]);
384 /* If fewer than 8 outputs, the list must be null terminated */
386 iowrite32(0, &opregion->acpi->didl[i]);
391 list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
392 int output_type = ACPI_OTHER_OUTPUT;
394 dev_printk(KERN_ERR, &dev->pdev->dev,
395 "More than 8 outputs detected\n");
398 switch (connector->connector_type) {
399 case DRM_MODE_CONNECTOR_VGA:
400 case DRM_MODE_CONNECTOR_DVIA:
401 output_type = ACPI_VGA_OUTPUT;
403 case DRM_MODE_CONNECTOR_Composite:
404 case DRM_MODE_CONNECTOR_SVIDEO:
405 case DRM_MODE_CONNECTOR_Component:
406 case DRM_MODE_CONNECTOR_9PinDIN:
407 output_type = ACPI_TV_OUTPUT;
409 case DRM_MODE_CONNECTOR_DVII:
410 case DRM_MODE_CONNECTOR_DVID:
411 case DRM_MODE_CONNECTOR_DisplayPort:
412 case DRM_MODE_CONNECTOR_HDMIA:
413 case DRM_MODE_CONNECTOR_HDMIB:
414 output_type = ACPI_DIGITAL_OUTPUT;
416 case DRM_MODE_CONNECTOR_LVDS:
417 output_type = ACPI_LVDS_OUTPUT;
420 temp = ioread32(&opregion->acpi->didl[i]);
421 iowrite32(temp | (1<<31) | output_type | i,
422 &opregion->acpi->didl[i]);
428 static void intel_setup_cadls(struct drm_device *dev)
430 struct drm_i915_private *dev_priv = dev->dev_private;
431 struct intel_opregion *opregion = &dev_priv->opregion;
435 /* Initialize the CADL field by duplicating the DIDL values.
436 * Technically, this is not always correct as display outputs may exist,
437 * but not active. This initialization is necessary for some Clevo
438 * laptops that check this field before processing the brightness and
439 * display switching hotkeys. Just like DIDL, CADL is NULL-terminated if
440 * there are less than eight devices. */
442 disp_id = ioread32(&opregion->acpi->didl[i]);
443 iowrite32(disp_id, &opregion->acpi->cadl[i]);
444 } while (++i < 8 && disp_id != 0);
447 void intel_opregion_init(struct drm_device *dev)
449 struct drm_i915_private *dev_priv = dev->dev_private;
450 struct intel_opregion *opregion = &dev_priv->opregion;
452 if (!opregion->header)
455 if (opregion->acpi) {
456 if (drm_core_check_feature(dev, DRIVER_MODESET)) {
457 intel_didl_outputs(dev);
458 intel_setup_cadls(dev);
461 /* Notify BIOS we are ready to handle ACPI video ext notifs.
462 * Right now, all the events are handled by the ACPI video module.
463 * We don't actually need to do anything with them. */
464 iowrite32(0, &opregion->acpi->csts);
465 iowrite32(1, &opregion->acpi->drdy);
467 system_opregion = opregion;
468 register_acpi_notifier(&intel_opregion_notifier);
472 intel_opregion_enable_asle(dev);
475 void intel_opregion_fini(struct drm_device *dev)
477 struct drm_i915_private *dev_priv = dev->dev_private;
478 struct intel_opregion *opregion = &dev_priv->opregion;
480 if (!opregion->header)
483 if (opregion->acpi) {
484 iowrite32(0, &opregion->acpi->drdy);
486 system_opregion = NULL;
487 unregister_acpi_notifier(&intel_opregion_notifier);
490 /* just clear all opregion memory pointers now */
491 iounmap(opregion->header);
492 opregion->header = NULL;
493 opregion->acpi = NULL;
494 opregion->swsci = NULL;
495 opregion->asle = NULL;
496 opregion->vbt = NULL;
500 int intel_opregion_setup(struct drm_device *dev)
502 struct drm_i915_private *dev_priv = dev->dev_private;
503 struct intel_opregion *opregion = &dev_priv->opregion;
506 char buf[sizeof(OPREGION_SIGNATURE)];
509 asls = pci_read_config(dev->dev, PCI_ASLS, 4);
510 DRM_DEBUG_DRIVER("graphic opregion physical addr: 0x%x\n", asls);
512 DRM_DEBUG_DRIVER("ACPI OpRegion not supported!\n");
516 base = (void *)pmap_mapbios(asls, OPREGION_SIZE);
520 memcpy_fromio(buf, base, sizeof(buf));
522 if (memcmp(buf, OPREGION_SIGNATURE, 16)) {
523 DRM_DEBUG_DRIVER("opregion signature mismatch\n");
527 opregion->header = (struct opregion_header *)base;
528 opregion->vbt = base + OPREGION_VBT_OFFSET;
530 opregion->lid_state = (u32 *)(base + ACPI_CLID);
532 mboxes = ioread32(&opregion->header->mboxes);
533 if (mboxes & MBOX_ACPI) {
534 DRM_DEBUG_DRIVER("Public ACPI methods supported\n");
535 opregion->acpi = (struct opregion_acpi *)(base + OPREGION_ACPI_OFFSET);
538 if (mboxes & MBOX_SWSCI) {
539 DRM_DEBUG_DRIVER("SWSCI supported\n");
540 opregion->swsci = (struct opregion_swsci *)(base + OPREGION_SWSCI_OFFSET);
542 if (mboxes & MBOX_ASLE) {
543 DRM_DEBUG_DRIVER("ASLE supported\n");
544 opregion->asle = (struct opregion_asle *)(base + OPREGION_ASLE_OFFSET);
550 pmap_unmapdev((vm_offset_t)base, OPREGION_SIZE);