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 <acpi/video.h>
34 #include <drm/i915_drm.h>
36 #include "intel_drv.h"
40 #define PCI_SWSCI 0xe8
41 #define PCI_SWSCI_SCISEL (1 << 15)
42 #define PCI_SWSCI_GSSCIE (1 << 0)
44 #define OPREGION_HEADER_OFFSET 0
45 #define OPREGION_ACPI_OFFSET 0x100
46 #define ACPI_CLID 0x01ac /* current lid state indicator */
47 #define ACPI_CDCK 0x01b0 /* current docking state indicator */
48 #define OPREGION_SWSCI_OFFSET 0x200
49 #define OPREGION_ASLE_OFFSET 0x300
50 #define OPREGION_VBT_OFFSET 0x400
52 #define OPREGION_SIGNATURE "IntelGraphicsMem"
53 #define MBOX_ACPI (1<<0)
54 #define MBOX_SWSCI (1<<1)
55 #define MBOX_ASLE (1<<2)
57 struct opregion_header {
68 /* OpRegion mailbox #1: public ACPI methods */
69 struct opregion_acpi {
70 u32 drdy; /* driver readiness */
71 u32 csts; /* notification status */
72 u32 cevt; /* current event */
74 u32 didl[8]; /* supported display devices ID list */
75 u32 cpdl[8]; /* currently presented display list */
76 u32 cadl[8]; /* currently active display list */
77 u32 nadl[8]; /* next active devices list */
78 u32 aslp; /* ASL sleep time-out */
79 u32 tidx; /* toggle table index */
80 u32 chpd; /* current hotplug enable indicator */
81 u32 clid; /* current lid state*/
82 u32 cdck; /* current docking state */
83 u32 sxsw; /* Sx state resume */
84 u32 evts; /* ASL supported events */
85 u32 cnot; /* current OS notification */
86 u32 nrdy; /* driver status */
90 /* OpRegion mailbox #2: SWSCI */
91 struct opregion_swsci {
92 u32 scic; /* SWSCI command|status|data */
93 u32 parm; /* command parameters */
94 u32 dslp; /* driver sleep time-out */
98 /* OpRegion mailbox #3: ASLE */
99 struct opregion_asle {
100 u32 ardy; /* driver readiness */
101 u32 aslc; /* ASLE interrupt command */
102 u32 tche; /* technology enabled indicator */
103 u32 alsi; /* current ALS illuminance reading */
104 u32 bclp; /* backlight brightness to set */
105 u32 pfit; /* panel fitting state */
106 u32 cblv; /* current brightness level */
107 u16 bclm[20]; /* backlight level duty cycle mapping table */
108 u32 cpfm; /* current panel fitting mode */
109 u32 epfm; /* enabled panel fitting modes */
110 u8 plut[74]; /* panel LUT and identifier */
111 u32 pfmb; /* PWM freq and min brightness */
112 u32 cddv; /* color correction default values */
113 u32 pcft; /* power conservation features */
114 u32 srot; /* supported rotation angles */
115 u32 iuer; /* IUER events */
119 /* Driver readiness indicator */
120 #define ASLE_ARDY_READY (1 << 0)
121 #define ASLE_ARDY_NOT_READY (0 << 0)
123 /* ASLE Interrupt Command (ASLC) bits */
124 #define ASLC_SET_ALS_ILLUM (1 << 0)
125 #define ASLC_SET_BACKLIGHT (1 << 1)
126 #define ASLC_SET_PFIT (1 << 2)
127 #define ASLC_SET_PWM_FREQ (1 << 3)
128 #define ASLC_SUPPORTED_ROTATION_ANGLES (1 << 4)
129 #define ASLC_BUTTON_ARRAY (1 << 5)
130 #define ASLC_CONVERTIBLE_INDICATOR (1 << 6)
131 #define ASLC_DOCKING_INDICATOR (1 << 7)
132 #define ASLC_ISCT_STATE_CHANGE (1 << 8)
133 #define ASLC_REQ_MSK 0x1ff
135 #define ASLC_ALS_ILLUM_FAILED (1 << 10)
136 #define ASLC_BACKLIGHT_FAILED (1 << 12)
137 #define ASLC_PFIT_FAILED (1 << 14)
138 #define ASLC_PWM_FREQ_FAILED (1 << 16)
139 #define ASLC_ROTATION_ANGLES_FAILED (1 << 18)
140 #define ASLC_BUTTON_ARRAY_FAILED (1 << 20)
141 #define ASLC_CONVERTIBLE_FAILED (1 << 22)
142 #define ASLC_DOCKING_FAILED (1 << 24)
143 #define ASLC_ISCT_STATE_FAILED (1 << 26)
145 /* Technology enabled indicator */
146 #define ASLE_TCHE_ALS_EN (1 << 0)
147 #define ASLE_TCHE_BLC_EN (1 << 1)
148 #define ASLE_TCHE_PFIT_EN (1 << 2)
149 #define ASLE_TCHE_PFMB_EN (1 << 3)
151 /* ASLE backlight brightness to set */
152 #define ASLE_BCLP_VALID (1<<31)
153 #define ASLE_BCLP_MSK (~(1<<31))
155 /* ASLE panel fitting request */
156 #define ASLE_PFIT_VALID (1<<31)
157 #define ASLE_PFIT_CENTER (1<<0)
158 #define ASLE_PFIT_STRETCH_TEXT (1<<1)
159 #define ASLE_PFIT_STRETCH_GFX (1<<2)
161 /* PWM frequency and minimum brightness */
162 #define ASLE_PFMB_BRIGHTNESS_MASK (0xff)
163 #define ASLE_PFMB_BRIGHTNESS_VALID (1<<8)
164 #define ASLE_PFMB_PWM_MASK (0x7ffffe00)
165 #define ASLE_PFMB_PWM_VALID (1<<31)
167 #define ASLE_CBLV_VALID (1<<31)
170 #define ASLE_IUER_DOCKING (1 << 7)
171 #define ASLE_IUER_CONVERTIBLE (1 << 6)
172 #define ASLE_IUER_ROTATION_LOCK_BTN (1 << 4)
173 #define ASLE_IUER_VOLUME_DOWN_BTN (1 << 3)
174 #define ASLE_IUER_VOLUME_UP_BTN (1 << 2)
175 #define ASLE_IUER_WINDOWS_BTN (1 << 1)
176 #define ASLE_IUER_POWER_BTN (1 << 0)
178 /* Software System Control Interrupt (SWSCI) */
179 #define SWSCI_SCIC_INDICATOR (1 << 0)
180 #define SWSCI_SCIC_MAIN_FUNCTION_SHIFT 1
181 #define SWSCI_SCIC_MAIN_FUNCTION_MASK (0xf << 1)
182 #define SWSCI_SCIC_SUB_FUNCTION_SHIFT 8
183 #define SWSCI_SCIC_SUB_FUNCTION_MASK (0xff << 8)
184 #define SWSCI_SCIC_EXIT_PARAMETER_SHIFT 8
185 #define SWSCI_SCIC_EXIT_PARAMETER_MASK (0xff << 8)
186 #define SWSCI_SCIC_EXIT_STATUS_SHIFT 5
187 #define SWSCI_SCIC_EXIT_STATUS_MASK (7 << 5)
188 #define SWSCI_SCIC_EXIT_STATUS_SUCCESS 1
190 #define SWSCI_FUNCTION_CODE(main, sub) \
191 ((main) << SWSCI_SCIC_MAIN_FUNCTION_SHIFT | \
192 (sub) << SWSCI_SCIC_SUB_FUNCTION_SHIFT)
194 /* SWSCI: Get BIOS Data (GBDA) */
196 #define SWSCI_GBDA_SUPPORTED_CALLS SWSCI_FUNCTION_CODE(SWSCI_GBDA, 0)
197 #define SWSCI_GBDA_REQUESTED_CALLBACKS SWSCI_FUNCTION_CODE(SWSCI_GBDA, 1)
198 #define SWSCI_GBDA_BOOT_DISPLAY_PREF SWSCI_FUNCTION_CODE(SWSCI_GBDA, 4)
199 #define SWSCI_GBDA_PANEL_DETAILS SWSCI_FUNCTION_CODE(SWSCI_GBDA, 5)
200 #define SWSCI_GBDA_TV_STANDARD SWSCI_FUNCTION_CODE(SWSCI_GBDA, 6)
201 #define SWSCI_GBDA_INTERNAL_GRAPHICS SWSCI_FUNCTION_CODE(SWSCI_GBDA, 7)
202 #define SWSCI_GBDA_SPREAD_SPECTRUM SWSCI_FUNCTION_CODE(SWSCI_GBDA, 10)
204 /* SWSCI: System BIOS Callbacks (SBCB) */
206 #define SWSCI_SBCB_SUPPORTED_CALLBACKS SWSCI_FUNCTION_CODE(SWSCI_SBCB, 0)
207 #define SWSCI_SBCB_INIT_COMPLETION SWSCI_FUNCTION_CODE(SWSCI_SBCB, 1)
208 #define SWSCI_SBCB_PRE_HIRES_SET_MODE SWSCI_FUNCTION_CODE(SWSCI_SBCB, 3)
209 #define SWSCI_SBCB_POST_HIRES_SET_MODE SWSCI_FUNCTION_CODE(SWSCI_SBCB, 4)
210 #define SWSCI_SBCB_DISPLAY_SWITCH SWSCI_FUNCTION_CODE(SWSCI_SBCB, 5)
211 #define SWSCI_SBCB_SET_TV_FORMAT SWSCI_FUNCTION_CODE(SWSCI_SBCB, 6)
212 #define SWSCI_SBCB_ADAPTER_POWER_STATE SWSCI_FUNCTION_CODE(SWSCI_SBCB, 7)
213 #define SWSCI_SBCB_DISPLAY_POWER_STATE SWSCI_FUNCTION_CODE(SWSCI_SBCB, 8)
214 #define SWSCI_SBCB_SET_BOOT_DISPLAY SWSCI_FUNCTION_CODE(SWSCI_SBCB, 9)
215 #define SWSCI_SBCB_SET_PANEL_DETAILS SWSCI_FUNCTION_CODE(SWSCI_SBCB, 10)
216 #define SWSCI_SBCB_SET_INTERNAL_GFX SWSCI_FUNCTION_CODE(SWSCI_SBCB, 11)
217 #define SWSCI_SBCB_POST_HIRES_TO_DOS_FS SWSCI_FUNCTION_CODE(SWSCI_SBCB, 16)
218 #define SWSCI_SBCB_SUSPEND_RESUME SWSCI_FUNCTION_CODE(SWSCI_SBCB, 17)
219 #define SWSCI_SBCB_SET_SPREAD_SPECTRUM SWSCI_FUNCTION_CODE(SWSCI_SBCB, 18)
220 #define SWSCI_SBCB_POST_VBE_PM SWSCI_FUNCTION_CODE(SWSCI_SBCB, 19)
221 #define SWSCI_SBCB_ENABLE_DISABLE_AUDIO SWSCI_FUNCTION_CODE(SWSCI_SBCB, 21)
223 #define ACPI_OTHER_OUTPUT (0<<8)
224 #define ACPI_VGA_OUTPUT (1<<8)
225 #define ACPI_TV_OUTPUT (2<<8)
226 #define ACPI_DIGITAL_OUTPUT (3<<8)
227 #define ACPI_LVDS_OUTPUT (4<<8)
229 #define MAX_DSLP 1500
232 static int swsci(struct drm_device *dev, u32 function, u32 parm, u32 *parm_out)
234 struct drm_i915_private *dev_priv = dev->dev_private;
235 struct opregion_swsci __iomem *swsci = dev_priv->opregion.swsci;
236 u32 main_function, sub_function, scic;
243 main_function = (function & SWSCI_SCIC_MAIN_FUNCTION_MASK) >>
244 SWSCI_SCIC_MAIN_FUNCTION_SHIFT;
245 sub_function = (function & SWSCI_SCIC_SUB_FUNCTION_MASK) >>
246 SWSCI_SCIC_SUB_FUNCTION_SHIFT;
248 /* Check if we can call the function. See swsci_setup for details. */
249 if (main_function == SWSCI_SBCB) {
250 if ((dev_priv->opregion.swsci_sbcb_sub_functions &
251 (1 << sub_function)) == 0)
253 } else if (main_function == SWSCI_GBDA) {
254 if ((dev_priv->opregion.swsci_gbda_sub_functions &
255 (1 << sub_function)) == 0)
259 /* Driver sleep timeout in ms. */
260 dslp = ioread32(&swsci->dslp);
262 /* The spec says 2ms should be the default, but it's too small
263 * for some machines. */
265 } else if (dslp > MAX_DSLP) {
266 /* Hey bios, trust must be earned. */
267 DRM_INFO_ONCE("ACPI BIOS requests an excessive sleep of %u ms, "
268 "using %u ms instead\n", dslp, MAX_DSLP);
272 /* The spec tells us to do this, but we are the only user... */
273 scic = ioread32(&swsci->scic);
274 if (scic & SWSCI_SCIC_INDICATOR) {
275 DRM_DEBUG_DRIVER("SWSCI request already in progress\n");
279 scic = function | SWSCI_SCIC_INDICATOR;
281 iowrite32(parm, &swsci->parm);
282 iowrite32(scic, &swsci->scic);
284 /* Ensure SCI event is selected and event trigger is cleared. */
285 pci_read_config_word(dev->pdev, PCI_SWSCI, &pci_swsci);
286 if (!(pci_swsci & PCI_SWSCI_SCISEL) || (pci_swsci & PCI_SWSCI_GSSCIE)) {
287 pci_swsci |= PCI_SWSCI_SCISEL;
288 pci_swsci &= ~PCI_SWSCI_GSSCIE;
289 pci_write_config_word(dev->pdev, PCI_SWSCI, pci_swsci);
292 /* Use event trigger to tell bios to check the mail. */
293 pci_swsci |= PCI_SWSCI_GSSCIE;
294 pci_write_config_word(dev->pdev, PCI_SWSCI, pci_swsci);
296 /* Poll for the result. */
297 #define C (((scic = ioread32(&swsci->scic)) & SWSCI_SCIC_INDICATOR) == 0)
298 if (wait_for(C, dslp)) {
299 DRM_DEBUG_DRIVER("SWSCI request timed out\n");
303 scic = (scic & SWSCI_SCIC_EXIT_STATUS_MASK) >>
304 SWSCI_SCIC_EXIT_STATUS_SHIFT;
306 /* Note: scic == 0 is an error! */
307 if (scic != SWSCI_SCIC_EXIT_STATUS_SUCCESS) {
308 DRM_DEBUG_DRIVER("SWSCI request error %u\n", scic);
313 *parm_out = ioread32(&swsci->parm);
320 #define DISPLAY_TYPE_CRT 0
321 #define DISPLAY_TYPE_TV 1
322 #define DISPLAY_TYPE_EXTERNAL_FLAT_PANEL 2
323 #define DISPLAY_TYPE_INTERNAL_FLAT_PANEL 3
325 int intel_opregion_notify_encoder(struct intel_encoder *intel_encoder,
328 struct drm_device *dev = intel_encoder->base.dev;
333 /* don't care about old stuff for now */
337 port = intel_ddi_get_encoder_port(intel_encoder);
338 if (port == PORT_E) {
348 switch (intel_encoder->type) {
349 case INTEL_OUTPUT_ANALOG:
350 type = DISPLAY_TYPE_CRT;
352 case INTEL_OUTPUT_UNKNOWN:
353 case INTEL_OUTPUT_DISPLAYPORT:
354 case INTEL_OUTPUT_HDMI:
355 type = DISPLAY_TYPE_EXTERNAL_FLAT_PANEL;
357 case INTEL_OUTPUT_EDP:
358 type = DISPLAY_TYPE_INTERNAL_FLAT_PANEL;
361 WARN_ONCE(1, "unsupported intel_encoder type %d\n",
362 intel_encoder->type);
366 parm |= type << (16 + port * 3);
368 return swsci(dev, SWSCI_SBCB_DISPLAY_POWER_STATE, parm, NULL);
371 static const struct {
372 pci_power_t pci_power_state;
374 } power_state_map[] = {
379 { PCI_D3cold, 0x04 },
382 int intel_opregion_notify_adapter(struct drm_device *dev, pci_power_t state)
389 for (i = 0; i < ARRAY_SIZE(power_state_map); i++) {
390 if (state == power_state_map[i].pci_power_state)
391 return swsci(dev, SWSCI_SBCB_ADAPTER_POWER_STATE,
392 power_state_map[i].parm, NULL);
398 static u32 asle_set_backlight(struct drm_device *dev, u32 bclp)
400 struct drm_i915_private *dev_priv = dev->dev_private;
401 struct intel_connector *intel_connector;
402 struct opregion_asle __iomem *asle = dev_priv->opregion.asle;
404 DRM_DEBUG_DRIVER("bclp = 0x%08x\n", bclp);
406 if (!(bclp & ASLE_BCLP_VALID))
407 return ASLC_BACKLIGHT_FAILED;
409 bclp &= ASLE_BCLP_MSK;
411 return ASLC_BACKLIGHT_FAILED;
413 drm_modeset_lock(&dev->mode_config.connection_mutex, NULL);
416 * Update backlight on all connectors that support backlight (usually
419 DRM_DEBUG_KMS("updating opregion backlight %d/255\n", bclp);
420 list_for_each_entry(intel_connector, &dev->mode_config.connector_list, base.head)
421 intel_panel_set_backlight(intel_connector, bclp, 255);
422 iowrite32(DIV_ROUND_UP(bclp * 100, 255) | ASLE_CBLV_VALID, &asle->cblv);
424 drm_modeset_unlock(&dev->mode_config.connection_mutex);
430 static u32 asle_set_als_illum(struct drm_device *dev, u32 alsi)
432 /* alsi is the current ALS reading in lux. 0 indicates below sensor
433 range, 0xffff indicates above sensor range. 1-0xfffe are valid */
434 DRM_DEBUG_DRIVER("Illum is not supported\n");
435 return ASLC_ALS_ILLUM_FAILED;
438 static u32 asle_set_pwm_freq(struct drm_device *dev, u32 pfmb)
440 DRM_DEBUG_DRIVER("PWM freq is not supported\n");
441 return ASLC_PWM_FREQ_FAILED;
444 static u32 asle_set_pfit(struct drm_device *dev, u32 pfit)
446 /* Panel fitting is currently controlled by the X code, so this is a
447 noop until modesetting support works fully */
448 DRM_DEBUG_DRIVER("Pfit is not supported\n");
449 return ASLC_PFIT_FAILED;
452 static u32 asle_set_supported_rotation_angles(struct drm_device *dev, u32 srot)
454 DRM_DEBUG_DRIVER("SROT is not supported\n");
455 return ASLC_ROTATION_ANGLES_FAILED;
458 static u32 asle_set_button_array(struct drm_device *dev, u32 iuer)
461 DRM_DEBUG_DRIVER("Button array event is not supported (nothing)\n");
462 if (iuer & ASLE_IUER_ROTATION_LOCK_BTN)
463 DRM_DEBUG_DRIVER("Button array event is not supported (rotation lock)\n");
464 if (iuer & ASLE_IUER_VOLUME_DOWN_BTN)
465 DRM_DEBUG_DRIVER("Button array event is not supported (volume down)\n");
466 if (iuer & ASLE_IUER_VOLUME_UP_BTN)
467 DRM_DEBUG_DRIVER("Button array event is not supported (volume up)\n");
468 if (iuer & ASLE_IUER_WINDOWS_BTN)
469 DRM_DEBUG_DRIVER("Button array event is not supported (windows)\n");
470 if (iuer & ASLE_IUER_POWER_BTN)
471 DRM_DEBUG_DRIVER("Button array event is not supported (power)\n");
473 return ASLC_BUTTON_ARRAY_FAILED;
476 static u32 asle_set_convertible(struct drm_device *dev, u32 iuer)
478 if (iuer & ASLE_IUER_CONVERTIBLE)
479 DRM_DEBUG_DRIVER("Convertible is not supported (clamshell)\n");
481 DRM_DEBUG_DRIVER("Convertible is not supported (slate)\n");
483 return ASLC_CONVERTIBLE_FAILED;
486 static u32 asle_set_docking(struct drm_device *dev, u32 iuer)
488 if (iuer & ASLE_IUER_DOCKING)
489 DRM_DEBUG_DRIVER("Docking is not supported (docked)\n");
491 DRM_DEBUG_DRIVER("Docking is not supported (undocked)\n");
493 return ASLC_DOCKING_FAILED;
496 static u32 asle_isct_state(struct drm_device *dev)
498 DRM_DEBUG_DRIVER("ISCT is not supported\n");
499 return ASLC_ISCT_STATE_FAILED;
502 static void asle_work(struct work_struct *work)
504 struct intel_opregion *opregion =
505 container_of(work, struct intel_opregion, asle_work);
506 struct drm_i915_private *dev_priv =
507 container_of(opregion, struct drm_i915_private, opregion);
508 struct drm_device *dev = dev_priv->dev;
509 struct opregion_asle __iomem *asle = dev_priv->opregion.asle;
516 aslc_req = ioread32(&asle->aslc);
518 if (!(aslc_req & ASLC_REQ_MSK)) {
519 DRM_DEBUG_DRIVER("No request on ASLC interrupt 0x%08x\n",
524 if (aslc_req & ASLC_SET_ALS_ILLUM)
525 aslc_stat |= asle_set_als_illum(dev, ioread32(&asle->alsi));
527 if (aslc_req & ASLC_SET_BACKLIGHT)
528 aslc_stat |= asle_set_backlight(dev, ioread32(&asle->bclp));
530 if (aslc_req & ASLC_SET_PFIT)
531 aslc_stat |= asle_set_pfit(dev, ioread32(&asle->pfit));
533 if (aslc_req & ASLC_SET_PWM_FREQ)
534 aslc_stat |= asle_set_pwm_freq(dev, ioread32(&asle->pfmb));
536 if (aslc_req & ASLC_SUPPORTED_ROTATION_ANGLES)
537 aslc_stat |= asle_set_supported_rotation_angles(dev,
538 ioread32(&asle->srot));
540 if (aslc_req & ASLC_BUTTON_ARRAY)
541 aslc_stat |= asle_set_button_array(dev, ioread32(&asle->iuer));
543 if (aslc_req & ASLC_CONVERTIBLE_INDICATOR)
544 aslc_stat |= asle_set_convertible(dev, ioread32(&asle->iuer));
546 if (aslc_req & ASLC_DOCKING_INDICATOR)
547 aslc_stat |= asle_set_docking(dev, ioread32(&asle->iuer));
549 if (aslc_req & ASLC_ISCT_STATE_CHANGE)
550 aslc_stat |= asle_isct_state(dev);
552 iowrite32(aslc_stat, &asle->aslc);
555 void intel_opregion_asle_intr(struct drm_device *dev)
557 struct drm_i915_private *dev_priv = dev->dev_private;
559 if (dev_priv->opregion.asle)
560 schedule_work(&dev_priv->opregion.asle_work);
563 #define ACPI_EV_DISPLAY_SWITCH (1<<0)
564 #define ACPI_EV_LID (1<<1)
565 #define ACPI_EV_DOCK (1<<2)
567 static struct intel_opregion *system_opregion;
569 static int intel_opregion_video_event(struct notifier_block *nb,
570 unsigned long val, void *data)
572 /* The only video events relevant to opregion are 0x80. These indicate
573 either a docking event, lid switch or display switch request. In
574 Linux, these are handled by the dock, button and video drivers.
577 struct opregion_acpi __iomem *acpi;
578 struct acpi_bus_event *event = data;
581 if (strcmp(event->device_class, ACPI_VIDEO_CLASS) != 0)
584 if (!system_opregion)
587 acpi = system_opregion->acpi;
589 if (event->type == 0x80 &&
590 (ioread32(&acpi->cevt) & 1) == 0)
593 iowrite32(0, &acpi->csts);
598 static struct notifier_block intel_opregion_notifier = {
599 .notifier_call = intel_opregion_video_event,
603 * Initialise the DIDL field in opregion. This passes a list of devices to
604 * the firmware. Values are defined by section B.4.2 of the ACPI specification
608 static void intel_didl_outputs(struct drm_device *dev)
610 struct drm_i915_private *dev_priv = dev->dev_private;
611 struct intel_opregion *opregion = &dev_priv->opregion;
612 struct drm_connector *connector;
614 struct acpi_device *acpi_dev, *acpi_cdev, *acpi_video_bus = NULL;
615 unsigned long long device_id;
620 handle = ACPI_HANDLE(&dev->pdev->dev);
621 if (!handle || acpi_bus_get_device(handle, &acpi_dev))
624 if (acpi_is_video_device(handle))
625 acpi_video_bus = acpi_dev;
627 list_for_each_entry(acpi_cdev, &acpi_dev->children, node) {
628 if (acpi_is_video_device(acpi_cdev->handle)) {
629 acpi_video_bus = acpi_cdev;
635 if (!acpi_video_bus) {
636 pr_warn("No ACPI video bus found\n");
640 list_for_each_entry(acpi_cdev, &acpi_video_bus->children, node) {
642 dev_dbg(&dev->pdev->dev,
643 "More than 8 outputs detected via ACPI\n");
647 acpi_evaluate_integer(acpi_cdev->handle, "_ADR",
649 if (ACPI_SUCCESS(status)) {
652 iowrite32((u32)(device_id & 0x0f0f),
653 &opregion->acpi->didl[i]);
659 /* If fewer than 8 outputs, the list must be null terminated */
661 iowrite32(0, &opregion->acpi->didl[i]);
666 list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
667 int output_type = ACPI_OTHER_OUTPUT;
669 dev_dbg(&dev->pdev->dev,
670 "More than 8 outputs in connector list\n");
673 switch (connector->connector_type) {
674 case DRM_MODE_CONNECTOR_VGA:
675 case DRM_MODE_CONNECTOR_DVIA:
676 output_type = ACPI_VGA_OUTPUT;
678 case DRM_MODE_CONNECTOR_Composite:
679 case DRM_MODE_CONNECTOR_SVIDEO:
680 case DRM_MODE_CONNECTOR_Component:
681 case DRM_MODE_CONNECTOR_9PinDIN:
682 output_type = ACPI_TV_OUTPUT;
684 case DRM_MODE_CONNECTOR_DVII:
685 case DRM_MODE_CONNECTOR_DVID:
686 case DRM_MODE_CONNECTOR_DisplayPort:
687 case DRM_MODE_CONNECTOR_HDMIA:
688 case DRM_MODE_CONNECTOR_HDMIB:
689 output_type = ACPI_DIGITAL_OUTPUT;
691 case DRM_MODE_CONNECTOR_LVDS:
692 output_type = ACPI_LVDS_OUTPUT;
695 temp = ioread32(&opregion->acpi->didl[i]);
696 iowrite32(temp | (1<<31) | output_type | i,
697 &opregion->acpi->didl[i]);
703 static void intel_setup_cadls(struct drm_device *dev)
705 struct drm_i915_private *dev_priv = dev->dev_private;
706 struct intel_opregion *opregion = &dev_priv->opregion;
710 /* Initialize the CADL field by duplicating the DIDL values.
711 * Technically, this is not always correct as display outputs may exist,
712 * but not active. This initialization is necessary for some Clevo
713 * laptops that check this field before processing the brightness and
714 * display switching hotkeys. Just like DIDL, CADL is NULL-terminated if
715 * there are less than eight devices. */
717 disp_id = ioread32(&opregion->acpi->didl[i]);
718 iowrite32(disp_id, &opregion->acpi->cadl[i]);
719 } while (++i < 8 && disp_id != 0);
722 void intel_opregion_init(struct drm_device *dev)
724 struct drm_i915_private *dev_priv = dev->dev_private;
725 struct intel_opregion *opregion = &dev_priv->opregion;
727 if (!opregion->header)
730 if (opregion->acpi) {
731 if (drm_core_check_feature(dev, DRIVER_MODESET)) {
732 intel_didl_outputs(dev);
733 intel_setup_cadls(dev);
736 /* Notify BIOS we are ready to handle ACPI video ext notifs.
737 * Right now, all the events are handled by the ACPI video module.
738 * We don't actually need to do anything with them. */
739 iowrite32(0, &opregion->acpi->csts);
740 iowrite32(1, &opregion->acpi->drdy);
742 system_opregion = opregion;
743 register_acpi_notifier(&intel_opregion_notifier);
746 if (opregion->asle) {
747 iowrite32(ASLE_TCHE_BLC_EN, &opregion->asle->tche);
748 iowrite32(ASLE_ARDY_READY, &opregion->asle->ardy);
752 void intel_opregion_fini(struct drm_device *dev)
754 struct drm_i915_private *dev_priv = dev->dev_private;
755 struct intel_opregion *opregion = &dev_priv->opregion;
757 if (!opregion->header)
761 iowrite32(ASLE_ARDY_NOT_READY, &opregion->asle->ardy);
763 cancel_work_sync(&dev_priv->opregion.asle_work);
765 if (opregion->acpi) {
766 iowrite32(0, &opregion->acpi->drdy);
768 system_opregion = NULL;
769 unregister_acpi_notifier(&intel_opregion_notifier);
772 /* just clear all opregion memory pointers now */
773 iounmap(opregion->header);
774 opregion->header = NULL;
775 opregion->acpi = NULL;
776 opregion->swsci = NULL;
777 opregion->asle = NULL;
778 opregion->vbt = NULL;
779 opregion->lid_state = NULL;
782 static void swsci_setup(struct drm_device *dev)
784 struct drm_i915_private *dev_priv = dev->dev_private;
785 struct intel_opregion *opregion = &dev_priv->opregion;
786 bool requested_callbacks = false;
789 /* Sub-function code 0 is okay, let's allow them. */
790 opregion->swsci_gbda_sub_functions = 1;
791 opregion->swsci_sbcb_sub_functions = 1;
793 /* We use GBDA to ask for supported GBDA calls. */
794 if (swsci(dev, SWSCI_GBDA_SUPPORTED_CALLS, 0, &tmp) == 0) {
795 /* make the bits match the sub-function codes */
797 opregion->swsci_gbda_sub_functions |= tmp;
801 * We also use GBDA to ask for _requested_ SBCB callbacks. The driver
802 * must not call interfaces that are not specifically requested by the
805 if (swsci(dev, SWSCI_GBDA_REQUESTED_CALLBACKS, 0, &tmp) == 0) {
806 /* here, the bits already match sub-function codes */
807 opregion->swsci_sbcb_sub_functions |= tmp;
808 requested_callbacks = true;
812 * But we use SBCB to ask for _supported_ SBCB calls. This does not mean
813 * the callback is _requested_. But we still can't call interfaces that
816 if (swsci(dev, SWSCI_SBCB_SUPPORTED_CALLBACKS, 0, &tmp) == 0) {
817 /* make the bits match the sub-function codes */
818 u32 low = tmp & 0x7ff;
819 u32 high = tmp & ~0xfff; /* bit 11 is reserved */
820 tmp = (high << 4) | (low << 1) | 1;
822 /* best guess what to do with supported wrt requested */
823 if (requested_callbacks) {
824 u32 req = opregion->swsci_sbcb_sub_functions;
825 if ((req & tmp) != req)
826 DRM_DEBUG_DRIVER("SWSCI BIOS requested (%08x) SBCB callbacks that are not supported (%08x)\n", req, tmp);
827 /* XXX: for now, trust the requested callbacks */
828 /* opregion->swsci_sbcb_sub_functions &= tmp; */
830 opregion->swsci_sbcb_sub_functions |= tmp;
834 DRM_DEBUG_DRIVER("SWSCI GBDA callbacks %08x, SBCB callbacks %08x\n",
835 opregion->swsci_gbda_sub_functions,
836 opregion->swsci_sbcb_sub_functions);
838 #else /* CONFIG_ACPI */
839 static inline void swsci_setup(struct drm_device *dev) {}
840 #endif /* CONFIG_ACPI */
842 int intel_opregion_setup(struct drm_device *dev)
844 struct drm_i915_private *dev_priv = dev->dev_private;
845 struct intel_opregion *opregion = &dev_priv->opregion;
848 char buf[sizeof(OPREGION_SIGNATURE)];
851 pci_read_config_dword(dev->pdev, PCI_ASLS, &asls);
852 DRM_DEBUG_DRIVER("graphic opregion physical addr: 0x%x\n", asls);
854 DRM_DEBUG_DRIVER("ACPI OpRegion not supported!\n");
859 INIT_WORK(&opregion->asle_work, asle_work);
862 base = acpi_os_ioremap(asls, OPREGION_SIZE);
866 memcpy_fromio(buf, base, sizeof(buf));
868 if (memcmp(buf, OPREGION_SIGNATURE, 16)) {
869 DRM_DEBUG_DRIVER("opregion signature mismatch\n");
873 opregion->header = base;
874 opregion->vbt = base + OPREGION_VBT_OFFSET;
876 opregion->lid_state = base + ACPI_CLID;
878 mboxes = ioread32(&opregion->header->mboxes);
879 if (mboxes & MBOX_ACPI) {
880 DRM_DEBUG_DRIVER("Public ACPI methods supported\n");
881 opregion->acpi = base + OPREGION_ACPI_OFFSET;
884 if (mboxes & MBOX_SWSCI) {
885 DRM_DEBUG_DRIVER("SWSCI supported\n");
886 opregion->swsci = base + OPREGION_SWSCI_OFFSET;
889 if (mboxes & MBOX_ASLE) {
890 DRM_DEBUG_DRIVER("ASLE supported\n");
891 opregion->asle = base + OPREGION_ASLE_OFFSET;
893 iowrite32(ASLE_ARDY_NOT_READY, &opregion->asle->ardy);