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
28 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
30 #include <linux/acpi.h>
31 #include <linux/acpi_io.h>
32 #include <acpi/video.h>
35 #include <drm/i915_drm.h>
37 #include "intel_drv.h"
41 #define PCI_SWSCI 0xe8
42 #define PCI_SWSCI_SCISEL (1 << 15)
43 #define PCI_SWSCI_GSSCIE (1 << 0)
45 #define OPREGION_HEADER_OFFSET 0
46 #define OPREGION_ACPI_OFFSET 0x100
47 #define ACPI_CLID 0x01ac /* current lid state indicator */
48 #define ACPI_CDCK 0x01b0 /* current docking state indicator */
49 #define OPREGION_SWSCI_OFFSET 0x200
50 #define OPREGION_ASLE_OFFSET 0x300
51 #define OPREGION_VBT_OFFSET 0x400
53 #define OPREGION_SIGNATURE "IntelGraphicsMem"
54 #define MBOX_ACPI (1<<0)
55 #define MBOX_SWSCI (1<<1)
56 #define MBOX_ASLE (1<<2)
58 struct opregion_header {
67 } __attribute__((packed));
69 /* OpRegion mailbox #1: public ACPI methods */
70 struct opregion_acpi {
71 u32 drdy; /* driver readiness */
72 u32 csts; /* notification status */
73 u32 cevt; /* current event */
75 u32 didl[8]; /* supported display devices ID list */
76 u32 cpdl[8]; /* currently presented display list */
77 u32 cadl[8]; /* currently active display list */
78 u32 nadl[8]; /* next active devices list */
79 u32 aslp; /* ASL sleep time-out */
80 u32 tidx; /* toggle table index */
81 u32 chpd; /* current hotplug enable indicator */
82 u32 clid; /* current lid state*/
83 u32 cdck; /* current docking state */
84 u32 sxsw; /* Sx state resume */
85 u32 evts; /* ASL supported events */
86 u32 cnot; /* current OS notification */
87 u32 nrdy; /* driver status */
89 } __attribute__((packed));
91 /* OpRegion mailbox #2: SWSCI */
92 struct opregion_swsci {
93 u32 scic; /* SWSCI command|status|data */
94 u32 parm; /* command parameters */
95 u32 dslp; /* driver sleep time-out */
97 } __attribute__((packed));
99 /* OpRegion mailbox #3: ASLE */
100 struct opregion_asle {
101 u32 ardy; /* driver readiness */
102 u32 aslc; /* ASLE interrupt command */
103 u32 tche; /* technology enabled indicator */
104 u32 alsi; /* current ALS illuminance reading */
105 u32 bclp; /* backlight brightness to set */
106 u32 pfit; /* panel fitting state */
107 u32 cblv; /* current brightness level */
108 u16 bclm[20]; /* backlight level duty cycle mapping table */
109 u32 cpfm; /* current panel fitting mode */
110 u32 epfm; /* enabled panel fitting modes */
111 u8 plut[74]; /* panel LUT and identifier */
112 u32 pfmb; /* PWM freq and min brightness */
114 } __attribute__((packed));
116 /* Driver readiness indicator */
117 #define ASLE_ARDY_READY (1 << 0)
118 #define ASLE_ARDY_NOT_READY (0 << 0)
120 /* ASLE irq request bits */
121 #define ASLE_SET_ALS_ILLUM (1 << 0)
122 #define ASLE_SET_BACKLIGHT (1 << 1)
123 #define ASLE_SET_PFIT (1 << 2)
124 #define ASLE_SET_PWM_FREQ (1 << 3)
125 #define ASLE_REQ_MSK 0xf
127 /* response bits of ASLE irq request */
128 #define ASLE_ALS_ILLUM_FAILED (1<<10)
129 #define ASLE_BACKLIGHT_FAILED (1<<12)
130 #define ASLE_PFIT_FAILED (1<<14)
131 #define ASLE_PWM_FREQ_FAILED (1<<16)
133 /* Technology enabled indicator */
134 #define ASLE_TCHE_ALS_EN (1 << 0)
135 #define ASLE_TCHE_BLC_EN (1 << 1)
136 #define ASLE_TCHE_PFIT_EN (1 << 2)
137 #define ASLE_TCHE_PFMB_EN (1 << 3)
139 /* ASLE backlight brightness to set */
140 #define ASLE_BCLP_VALID (1<<31)
141 #define ASLE_BCLP_MSK (~(1<<31))
143 /* ASLE panel fitting request */
144 #define ASLE_PFIT_VALID (1<<31)
145 #define ASLE_PFIT_CENTER (1<<0)
146 #define ASLE_PFIT_STRETCH_TEXT (1<<1)
147 #define ASLE_PFIT_STRETCH_GFX (1<<2)
149 /* PWM frequency and minimum brightness */
150 #define ASLE_PFMB_BRIGHTNESS_MASK (0xff)
151 #define ASLE_PFMB_BRIGHTNESS_VALID (1<<8)
152 #define ASLE_PFMB_PWM_MASK (0x7ffffe00)
153 #define ASLE_PFMB_PWM_VALID (1<<31)
155 #define ASLE_CBLV_VALID (1<<31)
157 /* Software System Control Interrupt (SWSCI) */
158 #define SWSCI_SCIC_INDICATOR (1 << 0)
159 #define SWSCI_SCIC_MAIN_FUNCTION_SHIFT 1
160 #define SWSCI_SCIC_MAIN_FUNCTION_MASK (0xf << 1)
161 #define SWSCI_SCIC_SUB_FUNCTION_SHIFT 8
162 #define SWSCI_SCIC_SUB_FUNCTION_MASK (0xff << 8)
163 #define SWSCI_SCIC_EXIT_PARAMETER_SHIFT 8
164 #define SWSCI_SCIC_EXIT_PARAMETER_MASK (0xff << 8)
165 #define SWSCI_SCIC_EXIT_STATUS_SHIFT 5
166 #define SWSCI_SCIC_EXIT_STATUS_MASK (7 << 5)
167 #define SWSCI_SCIC_EXIT_STATUS_SUCCESS 1
169 #define SWSCI_FUNCTION_CODE(main, sub) \
170 ((main) << SWSCI_SCIC_MAIN_FUNCTION_SHIFT | \
171 (sub) << SWSCI_SCIC_SUB_FUNCTION_SHIFT)
173 /* SWSCI: Get BIOS Data (GBDA) */
175 #define SWSCI_GBDA_SUPPORTED_CALLS SWSCI_FUNCTION_CODE(SWSCI_GBDA, 0)
176 #define SWSCI_GBDA_REQUESTED_CALLBACKS SWSCI_FUNCTION_CODE(SWSCI_GBDA, 1)
177 #define SWSCI_GBDA_BOOT_DISPLAY_PREF SWSCI_FUNCTION_CODE(SWSCI_GBDA, 4)
178 #define SWSCI_GBDA_PANEL_DETAILS SWSCI_FUNCTION_CODE(SWSCI_GBDA, 5)
179 #define SWSCI_GBDA_TV_STANDARD SWSCI_FUNCTION_CODE(SWSCI_GBDA, 6)
180 #define SWSCI_GBDA_INTERNAL_GRAPHICS SWSCI_FUNCTION_CODE(SWSCI_GBDA, 7)
181 #define SWSCI_GBDA_SPREAD_SPECTRUM SWSCI_FUNCTION_CODE(SWSCI_GBDA, 10)
183 /* SWSCI: System BIOS Callbacks (SBCB) */
185 #define SWSCI_SBCB_SUPPORTED_CALLBACKS SWSCI_FUNCTION_CODE(SWSCI_SBCB, 0)
186 #define SWSCI_SBCB_INIT_COMPLETION SWSCI_FUNCTION_CODE(SWSCI_SBCB, 1)
187 #define SWSCI_SBCB_PRE_HIRES_SET_MODE SWSCI_FUNCTION_CODE(SWSCI_SBCB, 3)
188 #define SWSCI_SBCB_POST_HIRES_SET_MODE SWSCI_FUNCTION_CODE(SWSCI_SBCB, 4)
189 #define SWSCI_SBCB_DISPLAY_SWITCH SWSCI_FUNCTION_CODE(SWSCI_SBCB, 5)
190 #define SWSCI_SBCB_SET_TV_FORMAT SWSCI_FUNCTION_CODE(SWSCI_SBCB, 6)
191 #define SWSCI_SBCB_ADAPTER_POWER_STATE SWSCI_FUNCTION_CODE(SWSCI_SBCB, 7)
192 #define SWSCI_SBCB_DISPLAY_POWER_STATE SWSCI_FUNCTION_CODE(SWSCI_SBCB, 8)
193 #define SWSCI_SBCB_SET_BOOT_DISPLAY SWSCI_FUNCTION_CODE(SWSCI_SBCB, 9)
194 #define SWSCI_SBCB_SET_PANEL_DETAILS SWSCI_FUNCTION_CODE(SWSCI_SBCB, 10)
195 #define SWSCI_SBCB_SET_INTERNAL_GFX SWSCI_FUNCTION_CODE(SWSCI_SBCB, 11)
196 #define SWSCI_SBCB_POST_HIRES_TO_DOS_FS SWSCI_FUNCTION_CODE(SWSCI_SBCB, 16)
197 #define SWSCI_SBCB_SUSPEND_RESUME SWSCI_FUNCTION_CODE(SWSCI_SBCB, 17)
198 #define SWSCI_SBCB_SET_SPREAD_SPECTRUM SWSCI_FUNCTION_CODE(SWSCI_SBCB, 18)
199 #define SWSCI_SBCB_POST_VBE_PM SWSCI_FUNCTION_CODE(SWSCI_SBCB, 19)
200 #define SWSCI_SBCB_ENABLE_DISABLE_AUDIO SWSCI_FUNCTION_CODE(SWSCI_SBCB, 21)
202 #define ACPI_OTHER_OUTPUT (0<<8)
203 #define ACPI_VGA_OUTPUT (1<<8)
204 #define ACPI_TV_OUTPUT (2<<8)
205 #define ACPI_DIGITAL_OUTPUT (3<<8)
206 #define ACPI_LVDS_OUTPUT (4<<8)
209 static int swsci(struct drm_device *dev, u32 function, u32 parm, u32 *parm_out)
211 struct drm_i915_private *dev_priv = dev->dev_private;
212 struct opregion_swsci __iomem *swsci = dev_priv->opregion.swsci;
213 u32 main_function, sub_function, scic;
220 main_function = (function & SWSCI_SCIC_MAIN_FUNCTION_MASK) >>
221 SWSCI_SCIC_MAIN_FUNCTION_SHIFT;
222 sub_function = (function & SWSCI_SCIC_SUB_FUNCTION_MASK) >>
223 SWSCI_SCIC_SUB_FUNCTION_SHIFT;
225 /* Check if we can call the function. See swsci_setup for details. */
226 if (main_function == SWSCI_SBCB) {
227 if ((dev_priv->opregion.swsci_sbcb_sub_functions &
228 (1 << sub_function)) == 0)
230 } else if (main_function == SWSCI_GBDA) {
231 if ((dev_priv->opregion.swsci_gbda_sub_functions &
232 (1 << sub_function)) == 0)
236 /* Driver sleep timeout in ms. */
237 dslp = ioread32(&swsci->dslp);
240 } else if (dslp > 500) {
241 /* Hey bios, trust must be earned. */
242 WARN_ONCE(1, "excessive driver sleep timeout (DSPL) %u\n", dslp);
246 /* The spec tells us to do this, but we are the only user... */
247 scic = ioread32(&swsci->scic);
248 if (scic & SWSCI_SCIC_INDICATOR) {
249 DRM_DEBUG_DRIVER("SWSCI request already in progress\n");
253 scic = function | SWSCI_SCIC_INDICATOR;
255 iowrite32(parm, &swsci->parm);
256 iowrite32(scic, &swsci->scic);
258 /* Ensure SCI event is selected and event trigger is cleared. */
259 pci_read_config_word(dev->pdev, PCI_SWSCI, &pci_swsci);
260 if (!(pci_swsci & PCI_SWSCI_SCISEL) || (pci_swsci & PCI_SWSCI_GSSCIE)) {
261 pci_swsci |= PCI_SWSCI_SCISEL;
262 pci_swsci &= ~PCI_SWSCI_GSSCIE;
263 pci_write_config_word(dev->pdev, PCI_SWSCI, pci_swsci);
266 /* Use event trigger to tell bios to check the mail. */
267 pci_swsci |= PCI_SWSCI_GSSCIE;
268 pci_write_config_word(dev->pdev, PCI_SWSCI, pci_swsci);
270 /* Poll for the result. */
271 #define C (((scic = ioread32(&swsci->scic)) & SWSCI_SCIC_INDICATOR) == 0)
272 if (wait_for(C, dslp)) {
273 DRM_DEBUG_DRIVER("SWSCI request timed out\n");
277 scic = (scic & SWSCI_SCIC_EXIT_STATUS_MASK) >>
278 SWSCI_SCIC_EXIT_STATUS_SHIFT;
280 /* Note: scic == 0 is an error! */
281 if (scic != SWSCI_SCIC_EXIT_STATUS_SUCCESS) {
282 DRM_DEBUG_DRIVER("SWSCI request error %u\n", scic);
287 *parm_out = ioread32(&swsci->parm);
294 static u32 asle_set_backlight(struct drm_device *dev, u32 bclp)
296 struct drm_i915_private *dev_priv = dev->dev_private;
297 struct opregion_asle __iomem *asle = dev_priv->opregion.asle;
299 DRM_DEBUG_DRIVER("bclp = 0x%08x\n", bclp);
301 if (!(bclp & ASLE_BCLP_VALID))
302 return ASLE_BACKLIGHT_FAILED;
304 bclp &= ASLE_BCLP_MSK;
306 return ASLE_BACKLIGHT_FAILED;
308 intel_panel_set_backlight(dev, bclp, 255);
309 iowrite32((bclp*0x64)/0xff | ASLE_CBLV_VALID, &asle->cblv);
314 static u32 asle_set_als_illum(struct drm_device *dev, u32 alsi)
316 /* alsi is the current ALS reading in lux. 0 indicates below sensor
317 range, 0xffff indicates above sensor range. 1-0xfffe are valid */
318 DRM_DEBUG_DRIVER("Illum is not supported\n");
319 return ASLE_ALS_ILLUM_FAILED;
322 static u32 asle_set_pwm_freq(struct drm_device *dev, u32 pfmb)
324 DRM_DEBUG_DRIVER("PWM freq is not supported\n");
325 return ASLE_PWM_FREQ_FAILED;
328 static u32 asle_set_pfit(struct drm_device *dev, u32 pfit)
330 /* Panel fitting is currently controlled by the X code, so this is a
331 noop until modesetting support works fully */
332 DRM_DEBUG_DRIVER("Pfit is not supported\n");
333 return ASLE_PFIT_FAILED;
336 void intel_opregion_asle_intr(struct drm_device *dev)
338 struct drm_i915_private *dev_priv = dev->dev_private;
339 struct opregion_asle __iomem *asle = dev_priv->opregion.asle;
346 asle_req = ioread32(&asle->aslc) & ASLE_REQ_MSK;
349 DRM_DEBUG_DRIVER("non asle set request??\n");
353 if (asle_req & ASLE_SET_ALS_ILLUM)
354 asle_stat |= asle_set_als_illum(dev, ioread32(&asle->alsi));
356 if (asle_req & ASLE_SET_BACKLIGHT)
357 asle_stat |= asle_set_backlight(dev, ioread32(&asle->bclp));
359 if (asle_req & ASLE_SET_PFIT)
360 asle_stat |= asle_set_pfit(dev, ioread32(&asle->pfit));
362 if (asle_req & ASLE_SET_PWM_FREQ)
363 asle_stat |= asle_set_pwm_freq(dev, ioread32(&asle->pfmb));
365 iowrite32(asle_stat, &asle->aslc);
368 #define ACPI_EV_DISPLAY_SWITCH (1<<0)
369 #define ACPI_EV_LID (1<<1)
370 #define ACPI_EV_DOCK (1<<2)
372 static struct intel_opregion *system_opregion;
374 static int intel_opregion_video_event(struct notifier_block *nb,
375 unsigned long val, void *data)
377 /* The only video events relevant to opregion are 0x80. These indicate
378 either a docking event, lid switch or display switch request. In
379 Linux, these are handled by the dock, button and video drivers.
382 struct opregion_acpi __iomem *acpi;
383 struct acpi_bus_event *event = data;
386 if (strcmp(event->device_class, ACPI_VIDEO_CLASS) != 0)
389 if (!system_opregion)
392 acpi = system_opregion->acpi;
394 if (event->type == 0x80 &&
395 (ioread32(&acpi->cevt) & 1) == 0)
398 iowrite32(0, &acpi->csts);
403 static struct notifier_block intel_opregion_notifier = {
404 .notifier_call = intel_opregion_video_event,
408 * Initialise the DIDL field in opregion. This passes a list of devices to
409 * the firmware. Values are defined by section B.4.2 of the ACPI specification
413 static void intel_didl_outputs(struct drm_device *dev)
415 struct drm_i915_private *dev_priv = dev->dev_private;
416 struct intel_opregion *opregion = &dev_priv->opregion;
417 struct drm_connector *connector;
419 struct acpi_device *acpi_dev, *acpi_cdev, *acpi_video_bus = NULL;
420 unsigned long long device_id;
425 handle = DEVICE_ACPI_HANDLE(&dev->pdev->dev);
426 if (!handle || acpi_bus_get_device(handle, &acpi_dev))
429 if (acpi_is_video_device(handle))
430 acpi_video_bus = acpi_dev;
432 list_for_each_entry(acpi_cdev, &acpi_dev->children, node) {
433 if (acpi_is_video_device(acpi_cdev->handle)) {
434 acpi_video_bus = acpi_cdev;
440 if (!acpi_video_bus) {
441 pr_warn("No ACPI video bus found\n");
445 list_for_each_entry(acpi_cdev, &acpi_video_bus->children, node) {
447 dev_dbg(&dev->pdev->dev,
448 "More than 8 outputs detected via ACPI\n");
452 acpi_evaluate_integer(acpi_cdev->handle, "_ADR",
454 if (ACPI_SUCCESS(status)) {
457 iowrite32((u32)(device_id & 0x0f0f),
458 &opregion->acpi->didl[i]);
464 /* If fewer than 8 outputs, the list must be null terminated */
466 iowrite32(0, &opregion->acpi->didl[i]);
471 list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
472 int output_type = ACPI_OTHER_OUTPUT;
474 dev_dbg(&dev->pdev->dev,
475 "More than 8 outputs in connector list\n");
478 switch (connector->connector_type) {
479 case DRM_MODE_CONNECTOR_VGA:
480 case DRM_MODE_CONNECTOR_DVIA:
481 output_type = ACPI_VGA_OUTPUT;
483 case DRM_MODE_CONNECTOR_Composite:
484 case DRM_MODE_CONNECTOR_SVIDEO:
485 case DRM_MODE_CONNECTOR_Component:
486 case DRM_MODE_CONNECTOR_9PinDIN:
487 output_type = ACPI_TV_OUTPUT;
489 case DRM_MODE_CONNECTOR_DVII:
490 case DRM_MODE_CONNECTOR_DVID:
491 case DRM_MODE_CONNECTOR_DisplayPort:
492 case DRM_MODE_CONNECTOR_HDMIA:
493 case DRM_MODE_CONNECTOR_HDMIB:
494 output_type = ACPI_DIGITAL_OUTPUT;
496 case DRM_MODE_CONNECTOR_LVDS:
497 output_type = ACPI_LVDS_OUTPUT;
500 temp = ioread32(&opregion->acpi->didl[i]);
501 iowrite32(temp | (1<<31) | output_type | i,
502 &opregion->acpi->didl[i]);
508 static void intel_setup_cadls(struct drm_device *dev)
510 struct drm_i915_private *dev_priv = dev->dev_private;
511 struct intel_opregion *opregion = &dev_priv->opregion;
515 /* Initialize the CADL field by duplicating the DIDL values.
516 * Technically, this is not always correct as display outputs may exist,
517 * but not active. This initialization is necessary for some Clevo
518 * laptops that check this field before processing the brightness and
519 * display switching hotkeys. Just like DIDL, CADL is NULL-terminated if
520 * there are less than eight devices. */
522 disp_id = ioread32(&opregion->acpi->didl[i]);
523 iowrite32(disp_id, &opregion->acpi->cadl[i]);
524 } while (++i < 8 && disp_id != 0);
527 void intel_opregion_init(struct drm_device *dev)
529 struct drm_i915_private *dev_priv = dev->dev_private;
530 struct intel_opregion *opregion = &dev_priv->opregion;
532 if (!opregion->header)
535 if (opregion->acpi) {
536 if (drm_core_check_feature(dev, DRIVER_MODESET)) {
537 intel_didl_outputs(dev);
538 intel_setup_cadls(dev);
541 /* Notify BIOS we are ready to handle ACPI video ext notifs.
542 * Right now, all the events are handled by the ACPI video module.
543 * We don't actually need to do anything with them. */
544 iowrite32(0, &opregion->acpi->csts);
545 iowrite32(1, &opregion->acpi->drdy);
547 system_opregion = opregion;
548 register_acpi_notifier(&intel_opregion_notifier);
551 if (opregion->asle) {
552 iowrite32(ASLE_TCHE_BLC_EN, &opregion->asle->tche);
553 iowrite32(ASLE_ARDY_READY, &opregion->asle->ardy);
557 void intel_opregion_fini(struct drm_device *dev)
559 struct drm_i915_private *dev_priv = dev->dev_private;
560 struct intel_opregion *opregion = &dev_priv->opregion;
562 if (!opregion->header)
566 iowrite32(ASLE_ARDY_NOT_READY, &opregion->asle->ardy);
568 if (opregion->acpi) {
569 iowrite32(0, &opregion->acpi->drdy);
571 system_opregion = NULL;
572 unregister_acpi_notifier(&intel_opregion_notifier);
575 /* just clear all opregion memory pointers now */
576 iounmap(opregion->header);
577 opregion->header = NULL;
578 opregion->acpi = NULL;
579 opregion->swsci = NULL;
580 opregion->asle = NULL;
581 opregion->vbt = NULL;
584 static void swsci_setup(struct drm_device *dev)
586 struct drm_i915_private *dev_priv = dev->dev_private;
587 struct intel_opregion *opregion = &dev_priv->opregion;
588 bool requested_callbacks = false;
591 /* Sub-function code 0 is okay, let's allow them. */
592 opregion->swsci_gbda_sub_functions = 1;
593 opregion->swsci_sbcb_sub_functions = 1;
595 /* We use GBDA to ask for supported GBDA calls. */
596 if (swsci(dev, SWSCI_GBDA_SUPPORTED_CALLS, 0, &tmp) == 0) {
597 /* make the bits match the sub-function codes */
599 opregion->swsci_gbda_sub_functions |= tmp;
603 * We also use GBDA to ask for _requested_ SBCB callbacks. The driver
604 * must not call interfaces that are not specifically requested by the
607 if (swsci(dev, SWSCI_GBDA_REQUESTED_CALLBACKS, 0, &tmp) == 0) {
608 /* here, the bits already match sub-function codes */
609 opregion->swsci_sbcb_sub_functions |= tmp;
610 requested_callbacks = true;
614 * But we use SBCB to ask for _supported_ SBCB calls. This does not mean
615 * the callback is _requested_. But we still can't call interfaces that
618 if (swsci(dev, SWSCI_SBCB_SUPPORTED_CALLBACKS, 0, &tmp) == 0) {
619 /* make the bits match the sub-function codes */
620 u32 low = tmp & 0x7ff;
621 u32 high = tmp & ~0xfff; /* bit 11 is reserved */
622 tmp = (high << 4) | (low << 1) | 1;
624 /* best guess what to do with supported wrt requested */
625 if (requested_callbacks) {
626 u32 req = opregion->swsci_sbcb_sub_functions;
627 if ((req & tmp) != req)
628 DRM_DEBUG_DRIVER("SWSCI BIOS requested (%08x) SBCB callbacks that are not supported (%08x)\n", req, tmp);
629 /* XXX: for now, trust the requested callbacks */
630 /* opregion->swsci_sbcb_sub_functions &= tmp; */
632 opregion->swsci_sbcb_sub_functions |= tmp;
636 DRM_DEBUG_DRIVER("SWSCI GBDA callbacks %08x, SBCB callbacks %08x\n",
637 opregion->swsci_gbda_sub_functions,
638 opregion->swsci_sbcb_sub_functions);
640 #else /* CONFIG_ACPI */
641 static inline void swsci_setup(struct drm_device *dev) {}
642 #endif /* CONFIG_ACPI */
644 int intel_opregion_setup(struct drm_device *dev)
646 struct drm_i915_private *dev_priv = dev->dev_private;
647 struct intel_opregion *opregion = &dev_priv->opregion;
650 char buf[sizeof(OPREGION_SIGNATURE)];
653 pci_read_config_dword(dev->pdev, PCI_ASLS, &asls);
654 DRM_DEBUG_DRIVER("graphic opregion physical addr: 0x%x\n", asls);
656 DRM_DEBUG_DRIVER("ACPI OpRegion not supported!\n");
660 base = acpi_os_ioremap(asls, OPREGION_SIZE);
664 memcpy_fromio(buf, base, sizeof(buf));
666 if (memcmp(buf, OPREGION_SIGNATURE, 16)) {
667 DRM_DEBUG_DRIVER("opregion signature mismatch\n");
671 opregion->header = base;
672 opregion->vbt = base + OPREGION_VBT_OFFSET;
674 opregion->lid_state = base + ACPI_CLID;
676 mboxes = ioread32(&opregion->header->mboxes);
677 if (mboxes & MBOX_ACPI) {
678 DRM_DEBUG_DRIVER("Public ACPI methods supported\n");
679 opregion->acpi = base + OPREGION_ACPI_OFFSET;
682 if (mboxes & MBOX_SWSCI) {
683 DRM_DEBUG_DRIVER("SWSCI supported\n");
684 opregion->swsci = base + OPREGION_SWSCI_OFFSET;
687 if (mboxes & MBOX_ASLE) {
688 DRM_DEBUG_DRIVER("ASLE supported\n");
689 opregion->asle = base + OPREGION_ASLE_OFFSET;
691 iowrite32(ASLE_ARDY_NOT_READY, &opregion->asle->ardy);