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 {
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 */
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 */
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 */
113 u32 cddv; /* color correction default values */
114 u32 pcft; /* power conservation features */
115 u32 srot; /* supported rotation angles */
116 u32 iuer; /* IUER events */
120 /* Driver readiness indicator */
121 #define ASLE_ARDY_READY (1 << 0)
122 #define ASLE_ARDY_NOT_READY (0 << 0)
124 /* ASLE Interrupt Command (ASLC) bits */
125 #define ASLC_SET_ALS_ILLUM (1 << 0)
126 #define ASLC_SET_BACKLIGHT (1 << 1)
127 #define ASLC_SET_PFIT (1 << 2)
128 #define ASLC_SET_PWM_FREQ (1 << 3)
129 #define ASLC_SUPPORTED_ROTATION_ANGLES (1 << 4)
130 #define ASLC_BUTTON_ARRAY (1 << 5)
131 #define ASLC_CONVERTIBLE_INDICATOR (1 << 6)
132 #define ASLC_DOCKING_INDICATOR (1 << 7)
133 #define ASLC_ISCT_STATE_CHANGE (1 << 8)
134 #define ASLC_REQ_MSK 0x1ff
136 #define ASLC_ALS_ILLUM_FAILED (1 << 10)
137 #define ASLC_BACKLIGHT_FAILED (1 << 12)
138 #define ASLC_PFIT_FAILED (1 << 14)
139 #define ASLC_PWM_FREQ_FAILED (1 << 16)
140 #define ASLC_ROTATION_ANGLES_FAILED (1 << 18)
141 #define ASLC_BUTTON_ARRAY_FAILED (1 << 20)
142 #define ASLC_CONVERTIBLE_FAILED (1 << 22)
143 #define ASLC_DOCKING_FAILED (1 << 24)
144 #define ASLC_ISCT_STATE_FAILED (1 << 26)
146 /* Technology enabled indicator */
147 #define ASLE_TCHE_ALS_EN (1 << 0)
148 #define ASLE_TCHE_BLC_EN (1 << 1)
149 #define ASLE_TCHE_PFIT_EN (1 << 2)
150 #define ASLE_TCHE_PFMB_EN (1 << 3)
152 /* ASLE backlight brightness to set */
153 #define ASLE_BCLP_VALID (1<<31)
154 #define ASLE_BCLP_MSK (~(1<<31))
156 /* ASLE panel fitting request */
157 #define ASLE_PFIT_VALID (1<<31)
158 #define ASLE_PFIT_CENTER (1<<0)
159 #define ASLE_PFIT_STRETCH_TEXT (1<<1)
160 #define ASLE_PFIT_STRETCH_GFX (1<<2)
162 /* PWM frequency and minimum brightness */
163 #define ASLE_PFMB_BRIGHTNESS_MASK (0xff)
164 #define ASLE_PFMB_BRIGHTNESS_VALID (1<<8)
165 #define ASLE_PFMB_PWM_MASK (0x7ffffe00)
166 #define ASLE_PFMB_PWM_VALID (1<<31)
168 #define ASLE_CBLV_VALID (1<<31)
171 #define ASLE_IUER_DOCKING (1 << 7)
172 #define ASLE_IUER_CONVERTIBLE (1 << 6)
173 #define ASLE_IUER_ROTATION_LOCK_BTN (1 << 4)
174 #define ASLE_IUER_VOLUME_DOWN_BTN (1 << 3)
175 #define ASLE_IUER_VOLUME_UP_BTN (1 << 2)
176 #define ASLE_IUER_WINDOWS_BTN (1 << 1)
177 #define ASLE_IUER_POWER_BTN (1 << 0)
179 /* Software System Control Interrupt (SWSCI) */
180 #define SWSCI_SCIC_INDICATOR (1 << 0)
181 #define SWSCI_SCIC_MAIN_FUNCTION_SHIFT 1
182 #define SWSCI_SCIC_MAIN_FUNCTION_MASK (0xf << 1)
183 #define SWSCI_SCIC_SUB_FUNCTION_SHIFT 8
184 #define SWSCI_SCIC_SUB_FUNCTION_MASK (0xff << 8)
185 #define SWSCI_SCIC_EXIT_PARAMETER_SHIFT 8
186 #define SWSCI_SCIC_EXIT_PARAMETER_MASK (0xff << 8)
187 #define SWSCI_SCIC_EXIT_STATUS_SHIFT 5
188 #define SWSCI_SCIC_EXIT_STATUS_MASK (7 << 5)
189 #define SWSCI_SCIC_EXIT_STATUS_SUCCESS 1
191 #define SWSCI_FUNCTION_CODE(main, sub) \
192 ((main) << SWSCI_SCIC_MAIN_FUNCTION_SHIFT | \
193 (sub) << SWSCI_SCIC_SUB_FUNCTION_SHIFT)
195 /* SWSCI: Get BIOS Data (GBDA) */
197 #define SWSCI_GBDA_SUPPORTED_CALLS SWSCI_FUNCTION_CODE(SWSCI_GBDA, 0)
198 #define SWSCI_GBDA_REQUESTED_CALLBACKS SWSCI_FUNCTION_CODE(SWSCI_GBDA, 1)
199 #define SWSCI_GBDA_BOOT_DISPLAY_PREF SWSCI_FUNCTION_CODE(SWSCI_GBDA, 4)
200 #define SWSCI_GBDA_PANEL_DETAILS SWSCI_FUNCTION_CODE(SWSCI_GBDA, 5)
201 #define SWSCI_GBDA_TV_STANDARD SWSCI_FUNCTION_CODE(SWSCI_GBDA, 6)
202 #define SWSCI_GBDA_INTERNAL_GRAPHICS SWSCI_FUNCTION_CODE(SWSCI_GBDA, 7)
203 #define SWSCI_GBDA_SPREAD_SPECTRUM SWSCI_FUNCTION_CODE(SWSCI_GBDA, 10)
205 /* SWSCI: System BIOS Callbacks (SBCB) */
207 #define SWSCI_SBCB_SUPPORTED_CALLBACKS SWSCI_FUNCTION_CODE(SWSCI_SBCB, 0)
208 #define SWSCI_SBCB_INIT_COMPLETION SWSCI_FUNCTION_CODE(SWSCI_SBCB, 1)
209 #define SWSCI_SBCB_PRE_HIRES_SET_MODE SWSCI_FUNCTION_CODE(SWSCI_SBCB, 3)
210 #define SWSCI_SBCB_POST_HIRES_SET_MODE SWSCI_FUNCTION_CODE(SWSCI_SBCB, 4)
211 #define SWSCI_SBCB_DISPLAY_SWITCH SWSCI_FUNCTION_CODE(SWSCI_SBCB, 5)
212 #define SWSCI_SBCB_SET_TV_FORMAT SWSCI_FUNCTION_CODE(SWSCI_SBCB, 6)
213 #define SWSCI_SBCB_ADAPTER_POWER_STATE SWSCI_FUNCTION_CODE(SWSCI_SBCB, 7)
214 #define SWSCI_SBCB_DISPLAY_POWER_STATE SWSCI_FUNCTION_CODE(SWSCI_SBCB, 8)
215 #define SWSCI_SBCB_SET_BOOT_DISPLAY SWSCI_FUNCTION_CODE(SWSCI_SBCB, 9)
216 #define SWSCI_SBCB_SET_PANEL_DETAILS SWSCI_FUNCTION_CODE(SWSCI_SBCB, 10)
217 #define SWSCI_SBCB_SET_INTERNAL_GFX SWSCI_FUNCTION_CODE(SWSCI_SBCB, 11)
218 #define SWSCI_SBCB_POST_HIRES_TO_DOS_FS SWSCI_FUNCTION_CODE(SWSCI_SBCB, 16)
219 #define SWSCI_SBCB_SUSPEND_RESUME SWSCI_FUNCTION_CODE(SWSCI_SBCB, 17)
220 #define SWSCI_SBCB_SET_SPREAD_SPECTRUM SWSCI_FUNCTION_CODE(SWSCI_SBCB, 18)
221 #define SWSCI_SBCB_POST_VBE_PM SWSCI_FUNCTION_CODE(SWSCI_SBCB, 19)
222 #define SWSCI_SBCB_ENABLE_DISABLE_AUDIO SWSCI_FUNCTION_CODE(SWSCI_SBCB, 21)
224 #define ACPI_OTHER_OUTPUT (0<<8)
225 #define ACPI_VGA_OUTPUT (1<<8)
226 #define ACPI_TV_OUTPUT (2<<8)
227 #define ACPI_DIGITAL_OUTPUT (3<<8)
228 #define ACPI_LVDS_OUTPUT (4<<8)
230 #define MAX_DSLP 1500
233 static int swsci(struct drm_device *dev, u32 function, u32 parm, u32 *parm_out)
235 struct drm_i915_private *dev_priv = dev->dev_private;
236 struct opregion_swsci __iomem *swsci = dev_priv->opregion.swsci;
237 u32 main_function, sub_function, scic;
244 main_function = (function & SWSCI_SCIC_MAIN_FUNCTION_MASK) >>
245 SWSCI_SCIC_MAIN_FUNCTION_SHIFT;
246 sub_function = (function & SWSCI_SCIC_SUB_FUNCTION_MASK) >>
247 SWSCI_SCIC_SUB_FUNCTION_SHIFT;
249 /* Check if we can call the function. See swsci_setup for details. */
250 if (main_function == SWSCI_SBCB) {
251 if ((dev_priv->opregion.swsci_sbcb_sub_functions &
252 (1 << sub_function)) == 0)
254 } else if (main_function == SWSCI_GBDA) {
255 if ((dev_priv->opregion.swsci_gbda_sub_functions &
256 (1 << sub_function)) == 0)
260 /* Driver sleep timeout in ms. */
261 dslp = ioread32(&swsci->dslp);
263 /* The spec says 2ms should be the default, but it's too small
264 * for some machines. */
266 } else if (dslp > MAX_DSLP) {
267 /* Hey bios, trust must be earned. */
268 DRM_INFO_ONCE("ACPI BIOS requests an excessive sleep of %u ms, "
269 "using %u ms instead\n", dslp, MAX_DSLP);
273 /* The spec tells us to do this, but we are the only user... */
274 scic = ioread32(&swsci->scic);
275 if (scic & SWSCI_SCIC_INDICATOR) {
276 DRM_DEBUG_DRIVER("SWSCI request already in progress\n");
280 scic = function | SWSCI_SCIC_INDICATOR;
282 iowrite32(parm, &swsci->parm);
283 iowrite32(scic, &swsci->scic);
285 /* Ensure SCI event is selected and event trigger is cleared. */
286 pci_read_config_word(dev->pdev, PCI_SWSCI, &pci_swsci);
287 if (!(pci_swsci & PCI_SWSCI_SCISEL) || (pci_swsci & PCI_SWSCI_GSSCIE)) {
288 pci_swsci |= PCI_SWSCI_SCISEL;
289 pci_swsci &= ~PCI_SWSCI_GSSCIE;
290 pci_write_config_word(dev->pdev, PCI_SWSCI, pci_swsci);
293 /* Use event trigger to tell bios to check the mail. */
294 pci_swsci |= PCI_SWSCI_GSSCIE;
295 pci_write_config_word(dev->pdev, PCI_SWSCI, pci_swsci);
297 /* Poll for the result. */
298 #define C (((scic = ioread32(&swsci->scic)) & SWSCI_SCIC_INDICATOR) == 0)
299 if (wait_for(C, dslp)) {
300 DRM_DEBUG_DRIVER("SWSCI request timed out\n");
304 scic = (scic & SWSCI_SCIC_EXIT_STATUS_MASK) >>
305 SWSCI_SCIC_EXIT_STATUS_SHIFT;
307 /* Note: scic == 0 is an error! */
308 if (scic != SWSCI_SCIC_EXIT_STATUS_SUCCESS) {
309 DRM_DEBUG_DRIVER("SWSCI request error %u\n", scic);
314 *parm_out = ioread32(&swsci->parm);
321 #define DISPLAY_TYPE_CRT 0
322 #define DISPLAY_TYPE_TV 1
323 #define DISPLAY_TYPE_EXTERNAL_FLAT_PANEL 2
324 #define DISPLAY_TYPE_INTERNAL_FLAT_PANEL 3
326 int intel_opregion_notify_encoder(struct intel_encoder *intel_encoder,
329 struct drm_device *dev = intel_encoder->base.dev;
334 /* don't care about old stuff for now */
338 port = intel_ddi_get_encoder_port(intel_encoder);
339 if (port == PORT_E) {
349 switch (intel_encoder->type) {
350 case INTEL_OUTPUT_ANALOG:
351 type = DISPLAY_TYPE_CRT;
353 case INTEL_OUTPUT_UNKNOWN:
354 case INTEL_OUTPUT_DISPLAYPORT:
355 case INTEL_OUTPUT_HDMI:
356 type = DISPLAY_TYPE_EXTERNAL_FLAT_PANEL;
358 case INTEL_OUTPUT_EDP:
359 type = DISPLAY_TYPE_INTERNAL_FLAT_PANEL;
362 WARN_ONCE(1, "unsupported intel_encoder type %d\n",
363 intel_encoder->type);
367 parm |= type << (16 + port * 3);
369 return swsci(dev, SWSCI_SBCB_DISPLAY_POWER_STATE, parm, NULL);
372 static const struct {
373 pci_power_t pci_power_state;
375 } power_state_map[] = {
380 { PCI_D3cold, 0x04 },
383 int intel_opregion_notify_adapter(struct drm_device *dev, pci_power_t state)
390 for (i = 0; i < ARRAY_SIZE(power_state_map); i++) {
391 if (state == power_state_map[i].pci_power_state)
392 return swsci(dev, SWSCI_SBCB_ADAPTER_POWER_STATE,
393 power_state_map[i].parm, NULL);
399 static u32 asle_set_backlight(struct drm_device *dev, u32 bclp)
401 struct drm_i915_private *dev_priv = dev->dev_private;
402 struct intel_connector *intel_connector;
403 struct opregion_asle __iomem *asle = dev_priv->opregion.asle;
405 DRM_DEBUG_DRIVER("bclp = 0x%08x\n", bclp);
407 if (!(bclp & ASLE_BCLP_VALID))
408 return ASLC_BACKLIGHT_FAILED;
410 bclp &= ASLE_BCLP_MSK;
412 return ASLC_BACKLIGHT_FAILED;
414 mutex_lock(&dev->mode_config.mutex);
417 * Update backlight on all connectors that support backlight (usually
420 DRM_DEBUG_KMS("updating opregion backlight %d/255\n", bclp);
421 list_for_each_entry(intel_connector, &dev->mode_config.connector_list, base.head)
422 intel_panel_set_backlight(intel_connector, bclp, 255);
423 iowrite32(DIV_ROUND_UP(bclp * 100, 255) | ASLE_CBLV_VALID, &asle->cblv);
425 mutex_unlock(&dev->mode_config.mutex);
431 static u32 asle_set_als_illum(struct drm_device *dev, u32 alsi)
433 /* alsi is the current ALS reading in lux. 0 indicates below sensor
434 range, 0xffff indicates above sensor range. 1-0xfffe are valid */
435 DRM_DEBUG_DRIVER("Illum is not supported\n");
436 return ASLC_ALS_ILLUM_FAILED;
439 static u32 asle_set_pwm_freq(struct drm_device *dev, u32 pfmb)
441 DRM_DEBUG_DRIVER("PWM freq is not supported\n");
442 return ASLC_PWM_FREQ_FAILED;
445 static u32 asle_set_pfit(struct drm_device *dev, u32 pfit)
447 /* Panel fitting is currently controlled by the X code, so this is a
448 noop until modesetting support works fully */
449 DRM_DEBUG_DRIVER("Pfit is not supported\n");
450 return ASLC_PFIT_FAILED;
453 static u32 asle_set_supported_rotation_angles(struct drm_device *dev, u32 srot)
455 DRM_DEBUG_DRIVER("SROT is not supported\n");
456 return ASLC_ROTATION_ANGLES_FAILED;
459 static u32 asle_set_button_array(struct drm_device *dev, u32 iuer)
462 DRM_DEBUG_DRIVER("Button array event is not supported (nothing)\n");
463 if (iuer & ASLE_IUER_ROTATION_LOCK_BTN)
464 DRM_DEBUG_DRIVER("Button array event is not supported (rotation lock)\n");
465 if (iuer & ASLE_IUER_VOLUME_DOWN_BTN)
466 DRM_DEBUG_DRIVER("Button array event is not supported (volume down)\n");
467 if (iuer & ASLE_IUER_VOLUME_UP_BTN)
468 DRM_DEBUG_DRIVER("Button array event is not supported (volume up)\n");
469 if (iuer & ASLE_IUER_WINDOWS_BTN)
470 DRM_DEBUG_DRIVER("Button array event is not supported (windows)\n");
471 if (iuer & ASLE_IUER_POWER_BTN)
472 DRM_DEBUG_DRIVER("Button array event is not supported (power)\n");
474 return ASLC_BUTTON_ARRAY_FAILED;
477 static u32 asle_set_convertible(struct drm_device *dev, u32 iuer)
479 if (iuer & ASLE_IUER_CONVERTIBLE)
480 DRM_DEBUG_DRIVER("Convertible is not supported (clamshell)\n");
482 DRM_DEBUG_DRIVER("Convertible is not supported (slate)\n");
484 return ASLC_CONVERTIBLE_FAILED;
487 static u32 asle_set_docking(struct drm_device *dev, u32 iuer)
489 if (iuer & ASLE_IUER_DOCKING)
490 DRM_DEBUG_DRIVER("Docking is not supported (docked)\n");
492 DRM_DEBUG_DRIVER("Docking is not supported (undocked)\n");
494 return ASLC_DOCKING_FAILED;
497 static u32 asle_isct_state(struct drm_device *dev)
499 DRM_DEBUG_DRIVER("ISCT is not supported\n");
500 return ASLC_ISCT_STATE_FAILED;
503 static void asle_work(struct work_struct *work)
505 struct intel_opregion *opregion =
506 container_of(work, struct intel_opregion, asle_work);
507 struct drm_i915_private *dev_priv =
508 container_of(opregion, struct drm_i915_private, opregion);
509 struct drm_device *dev = dev_priv->dev;
510 struct opregion_asle __iomem *asle = dev_priv->opregion.asle;
517 aslc_req = ioread32(&asle->aslc);
519 if (!(aslc_req & ASLC_REQ_MSK)) {
520 DRM_DEBUG_DRIVER("No request on ASLC interrupt 0x%08x\n",
525 if (aslc_req & ASLC_SET_ALS_ILLUM)
526 aslc_stat |= asle_set_als_illum(dev, ioread32(&asle->alsi));
528 if (aslc_req & ASLC_SET_BACKLIGHT)
529 aslc_stat |= asle_set_backlight(dev, ioread32(&asle->bclp));
531 if (aslc_req & ASLC_SET_PFIT)
532 aslc_stat |= asle_set_pfit(dev, ioread32(&asle->pfit));
534 if (aslc_req & ASLC_SET_PWM_FREQ)
535 aslc_stat |= asle_set_pwm_freq(dev, ioread32(&asle->pfmb));
537 if (aslc_req & ASLC_SUPPORTED_ROTATION_ANGLES)
538 aslc_stat |= asle_set_supported_rotation_angles(dev,
539 ioread32(&asle->srot));
541 if (aslc_req & ASLC_BUTTON_ARRAY)
542 aslc_stat |= asle_set_button_array(dev, ioread32(&asle->iuer));
544 if (aslc_req & ASLC_CONVERTIBLE_INDICATOR)
545 aslc_stat |= asle_set_convertible(dev, ioread32(&asle->iuer));
547 if (aslc_req & ASLC_DOCKING_INDICATOR)
548 aslc_stat |= asle_set_docking(dev, ioread32(&asle->iuer));
550 if (aslc_req & ASLC_ISCT_STATE_CHANGE)
551 aslc_stat |= asle_isct_state(dev);
553 iowrite32(aslc_stat, &asle->aslc);
556 void intel_opregion_asle_intr(struct drm_device *dev)
558 struct drm_i915_private *dev_priv = dev->dev_private;
560 if (dev_priv->opregion.asle)
561 schedule_work(&dev_priv->opregion.asle_work);
564 #define ACPI_EV_DISPLAY_SWITCH (1<<0)
565 #define ACPI_EV_LID (1<<1)
566 #define ACPI_EV_DOCK (1<<2)
568 static struct intel_opregion *system_opregion;
570 static int intel_opregion_video_event(struct notifier_block *nb,
571 unsigned long val, void *data)
573 /* The only video events relevant to opregion are 0x80. These indicate
574 either a docking event, lid switch or display switch request. In
575 Linux, these are handled by the dock, button and video drivers.
578 struct opregion_acpi __iomem *acpi;
579 struct acpi_bus_event *event = data;
582 if (strcmp(event->device_class, ACPI_VIDEO_CLASS) != 0)
585 if (!system_opregion)
588 acpi = system_opregion->acpi;
590 if (event->type == 0x80 &&
591 (ioread32(&acpi->cevt) & 1) == 0)
594 iowrite32(0, &acpi->csts);
599 static struct notifier_block intel_opregion_notifier = {
600 .notifier_call = intel_opregion_video_event,
604 * Initialise the DIDL field in opregion. This passes a list of devices to
605 * the firmware. Values are defined by section B.4.2 of the ACPI specification
609 static void intel_didl_outputs(struct drm_device *dev)
611 struct drm_i915_private *dev_priv = dev->dev_private;
612 struct intel_opregion *opregion = &dev_priv->opregion;
613 struct drm_connector *connector;
615 struct acpi_device *acpi_dev, *acpi_cdev, *acpi_video_bus = NULL;
616 unsigned long long device_id;
621 handle = ACPI_HANDLE(&dev->pdev->dev);
622 if (!handle || acpi_bus_get_device(handle, &acpi_dev))
625 if (acpi_is_video_device(handle))
626 acpi_video_bus = acpi_dev;
628 list_for_each_entry(acpi_cdev, &acpi_dev->children, node) {
629 if (acpi_is_video_device(acpi_cdev->handle)) {
630 acpi_video_bus = acpi_cdev;
636 if (!acpi_video_bus) {
637 pr_warn("No ACPI video bus found\n");
641 list_for_each_entry(acpi_cdev, &acpi_video_bus->children, node) {
643 dev_dbg(&dev->pdev->dev,
644 "More than 8 outputs detected via ACPI\n");
648 acpi_evaluate_integer(acpi_cdev->handle, "_ADR",
650 if (ACPI_SUCCESS(status)) {
653 iowrite32((u32)(device_id & 0x0f0f),
654 &opregion->acpi->didl[i]);
660 /* If fewer than 8 outputs, the list must be null terminated */
662 iowrite32(0, &opregion->acpi->didl[i]);
667 list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
668 int output_type = ACPI_OTHER_OUTPUT;
670 dev_dbg(&dev->pdev->dev,
671 "More than 8 outputs in connector list\n");
674 switch (connector->connector_type) {
675 case DRM_MODE_CONNECTOR_VGA:
676 case DRM_MODE_CONNECTOR_DVIA:
677 output_type = ACPI_VGA_OUTPUT;
679 case DRM_MODE_CONNECTOR_Composite:
680 case DRM_MODE_CONNECTOR_SVIDEO:
681 case DRM_MODE_CONNECTOR_Component:
682 case DRM_MODE_CONNECTOR_9PinDIN:
683 output_type = ACPI_TV_OUTPUT;
685 case DRM_MODE_CONNECTOR_DVII:
686 case DRM_MODE_CONNECTOR_DVID:
687 case DRM_MODE_CONNECTOR_DisplayPort:
688 case DRM_MODE_CONNECTOR_HDMIA:
689 case DRM_MODE_CONNECTOR_HDMIB:
690 output_type = ACPI_DIGITAL_OUTPUT;
692 case DRM_MODE_CONNECTOR_LVDS:
693 output_type = ACPI_LVDS_OUTPUT;
696 temp = ioread32(&opregion->acpi->didl[i]);
697 iowrite32(temp | (1<<31) | output_type | i,
698 &opregion->acpi->didl[i]);
704 static void intel_setup_cadls(struct drm_device *dev)
706 struct drm_i915_private *dev_priv = dev->dev_private;
707 struct intel_opregion *opregion = &dev_priv->opregion;
711 /* Initialize the CADL field by duplicating the DIDL values.
712 * Technically, this is not always correct as display outputs may exist,
713 * but not active. This initialization is necessary for some Clevo
714 * laptops that check this field before processing the brightness and
715 * display switching hotkeys. Just like DIDL, CADL is NULL-terminated if
716 * there are less than eight devices. */
718 disp_id = ioread32(&opregion->acpi->didl[i]);
719 iowrite32(disp_id, &opregion->acpi->cadl[i]);
720 } while (++i < 8 && disp_id != 0);
723 void intel_opregion_init(struct drm_device *dev)
725 struct drm_i915_private *dev_priv = dev->dev_private;
726 struct intel_opregion *opregion = &dev_priv->opregion;
728 if (!opregion->header)
731 if (opregion->acpi) {
732 if (drm_core_check_feature(dev, DRIVER_MODESET)) {
733 intel_didl_outputs(dev);
734 intel_setup_cadls(dev);
737 /* Notify BIOS we are ready to handle ACPI video ext notifs.
738 * Right now, all the events are handled by the ACPI video module.
739 * We don't actually need to do anything with them. */
740 iowrite32(0, &opregion->acpi->csts);
741 iowrite32(1, &opregion->acpi->drdy);
743 system_opregion = opregion;
744 register_acpi_notifier(&intel_opregion_notifier);
747 if (opregion->asle) {
748 iowrite32(ASLE_TCHE_BLC_EN, &opregion->asle->tche);
749 iowrite32(ASLE_ARDY_READY, &opregion->asle->ardy);
753 void intel_opregion_fini(struct drm_device *dev)
755 struct drm_i915_private *dev_priv = dev->dev_private;
756 struct intel_opregion *opregion = &dev_priv->opregion;
758 if (!opregion->header)
762 iowrite32(ASLE_ARDY_NOT_READY, &opregion->asle->ardy);
764 cancel_work_sync(&dev_priv->opregion.asle_work);
766 if (opregion->acpi) {
767 iowrite32(0, &opregion->acpi->drdy);
769 system_opregion = NULL;
770 unregister_acpi_notifier(&intel_opregion_notifier);
773 /* just clear all opregion memory pointers now */
774 iounmap(opregion->header);
775 opregion->header = NULL;
776 opregion->acpi = NULL;
777 opregion->swsci = NULL;
778 opregion->asle = NULL;
779 opregion->vbt = NULL;
780 opregion->lid_state = NULL;
783 static void swsci_setup(struct drm_device *dev)
785 struct drm_i915_private *dev_priv = dev->dev_private;
786 struct intel_opregion *opregion = &dev_priv->opregion;
787 bool requested_callbacks = false;
790 /* Sub-function code 0 is okay, let's allow them. */
791 opregion->swsci_gbda_sub_functions = 1;
792 opregion->swsci_sbcb_sub_functions = 1;
794 /* We use GBDA to ask for supported GBDA calls. */
795 if (swsci(dev, SWSCI_GBDA_SUPPORTED_CALLS, 0, &tmp) == 0) {
796 /* make the bits match the sub-function codes */
798 opregion->swsci_gbda_sub_functions |= tmp;
802 * We also use GBDA to ask for _requested_ SBCB callbacks. The driver
803 * must not call interfaces that are not specifically requested by the
806 if (swsci(dev, SWSCI_GBDA_REQUESTED_CALLBACKS, 0, &tmp) == 0) {
807 /* here, the bits already match sub-function codes */
808 opregion->swsci_sbcb_sub_functions |= tmp;
809 requested_callbacks = true;
813 * But we use SBCB to ask for _supported_ SBCB calls. This does not mean
814 * the callback is _requested_. But we still can't call interfaces that
817 if (swsci(dev, SWSCI_SBCB_SUPPORTED_CALLBACKS, 0, &tmp) == 0) {
818 /* make the bits match the sub-function codes */
819 u32 low = tmp & 0x7ff;
820 u32 high = tmp & ~0xfff; /* bit 11 is reserved */
821 tmp = (high << 4) | (low << 1) | 1;
823 /* best guess what to do with supported wrt requested */
824 if (requested_callbacks) {
825 u32 req = opregion->swsci_sbcb_sub_functions;
826 if ((req & tmp) != req)
827 DRM_DEBUG_DRIVER("SWSCI BIOS requested (%08x) SBCB callbacks that are not supported (%08x)\n", req, tmp);
828 /* XXX: for now, trust the requested callbacks */
829 /* opregion->swsci_sbcb_sub_functions &= tmp; */
831 opregion->swsci_sbcb_sub_functions |= tmp;
835 DRM_DEBUG_DRIVER("SWSCI GBDA callbacks %08x, SBCB callbacks %08x\n",
836 opregion->swsci_gbda_sub_functions,
837 opregion->swsci_sbcb_sub_functions);
839 #else /* CONFIG_ACPI */
840 static inline void swsci_setup(struct drm_device *dev) {}
841 #endif /* CONFIG_ACPI */
843 int intel_opregion_setup(struct drm_device *dev)
845 struct drm_i915_private *dev_priv = dev->dev_private;
846 struct intel_opregion *opregion = &dev_priv->opregion;
849 char buf[sizeof(OPREGION_SIGNATURE)];
852 pci_read_config_dword(dev->pdev, PCI_ASLS, &asls);
853 DRM_DEBUG_DRIVER("graphic opregion physical addr: 0x%x\n", asls);
855 DRM_DEBUG_DRIVER("ACPI OpRegion not supported!\n");
860 INIT_WORK(&opregion->asle_work, asle_work);
863 base = acpi_os_ioremap(asls, OPREGION_SIZE);
867 memcpy_fromio(buf, base, sizeof(buf));
869 if (memcmp(buf, OPREGION_SIGNATURE, 16)) {
870 DRM_DEBUG_DRIVER("opregion signature mismatch\n");
874 opregion->header = base;
875 opregion->vbt = base + OPREGION_VBT_OFFSET;
877 opregion->lid_state = base + ACPI_CLID;
879 mboxes = ioread32(&opregion->header->mboxes);
880 if (mboxes & MBOX_ACPI) {
881 DRM_DEBUG_DRIVER("Public ACPI methods supported\n");
882 opregion->acpi = base + OPREGION_ACPI_OFFSET;
885 if (mboxes & MBOX_SWSCI) {
886 DRM_DEBUG_DRIVER("SWSCI supported\n");
887 opregion->swsci = base + OPREGION_SWSCI_OFFSET;
890 if (mboxes & MBOX_ASLE) {
891 DRM_DEBUG_DRIVER("ASLE supported\n");
892 opregion->asle = base + OPREGION_ASLE_OFFSET;
894 iowrite32(ASLE_ARDY_NOT_READY, &opregion->asle->ardy);