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"
33 #include <contrib/dev/acpica/source/include/acpi.h>
34 #include <contrib/dev/acpica/source/include/accommon.h>
35 #include <dev/acpica/acpivar.h>
39 #define PCI_SWSCI 0xe8
40 #define PCI_SWSCI_SCISEL (1 << 15)
41 #define PCI_SWSCI_GSSCIE (1 << 0)
43 #define OPREGION_HEADER_OFFSET 0
44 #define OPREGION_ACPI_OFFSET 0x100
45 #define ACPI_CLID 0x01ac /* current lid state indicator */
46 #define ACPI_CDCK 0x01b0 /* current docking state indicator */
47 #define OPREGION_SWSCI_OFFSET 0x200
48 #define OPREGION_ASLE_OFFSET 0x300
49 #define OPREGION_VBT_OFFSET 0x400
51 #define OPREGION_SIGNATURE "IntelGraphicsMem"
52 #define MBOX_ACPI (1<<0)
53 #define MBOX_SWSCI (1<<1)
54 #define MBOX_ASLE (1<<2)
56 struct opregion_header {
67 /* OpRegion mailbox #1: public ACPI methods */
68 struct opregion_acpi {
69 u32 drdy; /* driver readiness */
70 u32 csts; /* notification status */
71 u32 cevt; /* current event */
73 u32 didl[8]; /* supported display devices ID list */
74 u32 cpdl[8]; /* currently presented display list */
75 u32 cadl[8]; /* currently active display list */
76 u32 nadl[8]; /* next active devices list */
77 u32 aslp; /* ASL sleep time-out */
78 u32 tidx; /* toggle table index */
79 u32 chpd; /* current hotplug enable indicator */
80 u32 clid; /* current lid state*/
81 u32 cdck; /* current docking state */
82 u32 sxsw; /* Sx state resume */
83 u32 evts; /* ASL supported events */
84 u32 cnot; /* current OS notification */
85 u32 nrdy; /* driver status */
89 /* OpRegion mailbox #2: SWSCI */
90 struct opregion_swsci {
91 u32 scic; /* SWSCI command|status|data */
92 u32 parm; /* command parameters */
93 u32 dslp; /* driver sleep time-out */
97 /* OpRegion mailbox #3: ASLE */
98 struct opregion_asle {
99 u32 ardy; /* driver readiness */
100 u32 aslc; /* ASLE interrupt command */
101 u32 tche; /* technology enabled indicator */
102 u32 alsi; /* current ALS illuminance reading */
103 u32 bclp; /* backlight brightness to set */
104 u32 pfit; /* panel fitting state */
105 u32 cblv; /* current brightness level */
106 u16 bclm[20]; /* backlight level duty cycle mapping table */
107 u32 cpfm; /* current panel fitting mode */
108 u32 epfm; /* enabled panel fitting modes */
109 u8 plut[74]; /* panel LUT and identifier */
110 u32 pfmb; /* PWM freq and min brightness */
111 u32 cddv; /* color correction default values */
112 u32 pcft; /* power conservation features */
113 u32 srot; /* supported rotation angles */
114 u32 iuer; /* IUER events */
118 /* Driver readiness indicator */
119 #define ASLE_ARDY_READY (1 << 0)
120 #define ASLE_ARDY_NOT_READY (0 << 0)
122 /* ASLE Interrupt Command (ASLC) bits */
123 #define ASLC_SET_ALS_ILLUM (1 << 0)
124 #define ASLC_SET_BACKLIGHT (1 << 1)
125 #define ASLC_SET_PFIT (1 << 2)
126 #define ASLC_SET_PWM_FREQ (1 << 3)
127 #define ASLC_SUPPORTED_ROTATION_ANGLES (1 << 4)
128 #define ASLC_BUTTON_ARRAY (1 << 5)
129 #define ASLC_CONVERTIBLE_INDICATOR (1 << 6)
130 #define ASLC_DOCKING_INDICATOR (1 << 7)
131 #define ASLC_ISCT_STATE_CHANGE (1 << 8)
132 #define ASLC_REQ_MSK 0x1ff
134 #define ASLC_ALS_ILLUM_FAILED (1 << 10)
135 #define ASLC_BACKLIGHT_FAILED (1 << 12)
136 #define ASLC_PFIT_FAILED (1 << 14)
137 #define ASLC_PWM_FREQ_FAILED (1 << 16)
138 #define ASLC_ROTATION_ANGLES_FAILED (1 << 18)
139 #define ASLC_BUTTON_ARRAY_FAILED (1 << 20)
140 #define ASLC_CONVERTIBLE_FAILED (1 << 22)
141 #define ASLC_DOCKING_FAILED (1 << 24)
142 #define ASLC_ISCT_STATE_FAILED (1 << 26)
144 /* Technology enabled indicator */
145 #define ASLE_TCHE_ALS_EN (1 << 0)
146 #define ASLE_TCHE_BLC_EN (1 << 1)
147 #define ASLE_TCHE_PFIT_EN (1 << 2)
148 #define ASLE_TCHE_PFMB_EN (1 << 3)
150 /* ASLE backlight brightness to set */
151 #define ASLE_BCLP_VALID (1<<31)
152 #define ASLE_BCLP_MSK (~(1<<31))
154 /* ASLE panel fitting request */
155 #define ASLE_PFIT_VALID (1<<31)
156 #define ASLE_PFIT_CENTER (1<<0)
157 #define ASLE_PFIT_STRETCH_TEXT (1<<1)
158 #define ASLE_PFIT_STRETCH_GFX (1<<2)
160 /* PWM frequency and minimum brightness */
161 #define ASLE_PFMB_BRIGHTNESS_MASK (0xff)
162 #define ASLE_PFMB_BRIGHTNESS_VALID (1<<8)
163 #define ASLE_PFMB_PWM_MASK (0x7ffffe00)
164 #define ASLE_PFMB_PWM_VALID (1<<31)
166 #define ASLE_CBLV_VALID (1<<31)
169 #define ASLE_IUER_DOCKING (1 << 7)
170 #define ASLE_IUER_CONVERTIBLE (1 << 6)
171 #define ASLE_IUER_ROTATION_LOCK_BTN (1 << 4)
172 #define ASLE_IUER_VOLUME_DOWN_BTN (1 << 3)
173 #define ASLE_IUER_VOLUME_UP_BTN (1 << 2)
174 #define ASLE_IUER_WINDOWS_BTN (1 << 1)
175 #define ASLE_IUER_POWER_BTN (1 << 0)
177 /* Software System Control Interrupt (SWSCI) */
178 #define SWSCI_SCIC_INDICATOR (1 << 0)
179 #define SWSCI_SCIC_MAIN_FUNCTION_SHIFT 1
180 #define SWSCI_SCIC_MAIN_FUNCTION_MASK (0xf << 1)
181 #define SWSCI_SCIC_SUB_FUNCTION_SHIFT 8
182 #define SWSCI_SCIC_SUB_FUNCTION_MASK (0xff << 8)
183 #define SWSCI_SCIC_EXIT_PARAMETER_SHIFT 8
184 #define SWSCI_SCIC_EXIT_PARAMETER_MASK (0xff << 8)
185 #define SWSCI_SCIC_EXIT_STATUS_SHIFT 5
186 #define SWSCI_SCIC_EXIT_STATUS_MASK (7 << 5)
187 #define SWSCI_SCIC_EXIT_STATUS_SUCCESS 1
189 #define SWSCI_FUNCTION_CODE(main, sub) \
190 ((main) << SWSCI_SCIC_MAIN_FUNCTION_SHIFT | \
191 (sub) << SWSCI_SCIC_SUB_FUNCTION_SHIFT)
193 /* SWSCI: Get BIOS Data (GBDA) */
195 #define SWSCI_GBDA_SUPPORTED_CALLS SWSCI_FUNCTION_CODE(SWSCI_GBDA, 0)
196 #define SWSCI_GBDA_REQUESTED_CALLBACKS SWSCI_FUNCTION_CODE(SWSCI_GBDA, 1)
197 #define SWSCI_GBDA_BOOT_DISPLAY_PREF SWSCI_FUNCTION_CODE(SWSCI_GBDA, 4)
198 #define SWSCI_GBDA_PANEL_DETAILS SWSCI_FUNCTION_CODE(SWSCI_GBDA, 5)
199 #define SWSCI_GBDA_TV_STANDARD SWSCI_FUNCTION_CODE(SWSCI_GBDA, 6)
200 #define SWSCI_GBDA_INTERNAL_GRAPHICS SWSCI_FUNCTION_CODE(SWSCI_GBDA, 7)
201 #define SWSCI_GBDA_SPREAD_SPECTRUM SWSCI_FUNCTION_CODE(SWSCI_GBDA, 10)
203 /* SWSCI: System BIOS Callbacks (SBCB) */
205 #define SWSCI_SBCB_SUPPORTED_CALLBACKS SWSCI_FUNCTION_CODE(SWSCI_SBCB, 0)
206 #define SWSCI_SBCB_INIT_COMPLETION SWSCI_FUNCTION_CODE(SWSCI_SBCB, 1)
207 #define SWSCI_SBCB_PRE_HIRES_SET_MODE SWSCI_FUNCTION_CODE(SWSCI_SBCB, 3)
208 #define SWSCI_SBCB_POST_HIRES_SET_MODE SWSCI_FUNCTION_CODE(SWSCI_SBCB, 4)
209 #define SWSCI_SBCB_DISPLAY_SWITCH SWSCI_FUNCTION_CODE(SWSCI_SBCB, 5)
210 #define SWSCI_SBCB_SET_TV_FORMAT SWSCI_FUNCTION_CODE(SWSCI_SBCB, 6)
211 #define SWSCI_SBCB_ADAPTER_POWER_STATE SWSCI_FUNCTION_CODE(SWSCI_SBCB, 7)
212 #define SWSCI_SBCB_DISPLAY_POWER_STATE SWSCI_FUNCTION_CODE(SWSCI_SBCB, 8)
213 #define SWSCI_SBCB_SET_BOOT_DISPLAY SWSCI_FUNCTION_CODE(SWSCI_SBCB, 9)
214 #define SWSCI_SBCB_SET_PANEL_DETAILS SWSCI_FUNCTION_CODE(SWSCI_SBCB, 10)
215 #define SWSCI_SBCB_SET_INTERNAL_GFX SWSCI_FUNCTION_CODE(SWSCI_SBCB, 11)
216 #define SWSCI_SBCB_POST_HIRES_TO_DOS_FS SWSCI_FUNCTION_CODE(SWSCI_SBCB, 16)
217 #define SWSCI_SBCB_SUSPEND_RESUME SWSCI_FUNCTION_CODE(SWSCI_SBCB, 17)
218 #define SWSCI_SBCB_SET_SPREAD_SPECTRUM SWSCI_FUNCTION_CODE(SWSCI_SBCB, 18)
219 #define SWSCI_SBCB_POST_VBE_PM SWSCI_FUNCTION_CODE(SWSCI_SBCB, 19)
220 #define SWSCI_SBCB_ENABLE_DISABLE_AUDIO SWSCI_FUNCTION_CODE(SWSCI_SBCB, 21)
222 #define ACPI_OTHER_OUTPUT (0<<8)
223 #define ACPI_VGA_OUTPUT (1<<8)
224 #define ACPI_TV_OUTPUT (2<<8)
225 #define ACPI_DIGITAL_OUTPUT (3<<8)
226 #define ACPI_LVDS_OUTPUT (4<<8)
228 #define MAX_DSLP 1500
230 static int swsci(struct drm_device *dev, u32 function, u32 parm, u32 *parm_out)
232 struct drm_i915_private *dev_priv = dev->dev_private;
233 struct opregion_swsci __iomem *swsci = dev_priv->opregion.swsci;
234 u32 main_function, sub_function, scic;
241 main_function = (function & SWSCI_SCIC_MAIN_FUNCTION_MASK) >>
242 SWSCI_SCIC_MAIN_FUNCTION_SHIFT;
243 sub_function = (function & SWSCI_SCIC_SUB_FUNCTION_MASK) >>
244 SWSCI_SCIC_SUB_FUNCTION_SHIFT;
246 /* Check if we can call the function. See swsci_setup for details. */
247 if (main_function == SWSCI_SBCB) {
248 if ((dev_priv->opregion.swsci_sbcb_sub_functions &
249 (1 << sub_function)) == 0)
251 } else if (main_function == SWSCI_GBDA) {
252 if ((dev_priv->opregion.swsci_gbda_sub_functions &
253 (1 << sub_function)) == 0)
257 /* Driver sleep timeout in ms. */
258 dslp = ioread32(&swsci->dslp);
260 /* The spec says 2ms should be the default, but it's too small
261 * for some machines. */
263 } else if (dslp > MAX_DSLP) {
264 /* Hey bios, trust must be earned. */
265 DRM_INFO_ONCE("ACPI BIOS requests an excessive sleep of %u ms, "
266 "using %u ms instead\n", dslp, MAX_DSLP);
270 /* The spec tells us to do this, but we are the only user... */
271 scic = ioread32(&swsci->scic);
272 if (scic & SWSCI_SCIC_INDICATOR) {
273 DRM_DEBUG_DRIVER("SWSCI request already in progress\n");
277 scic = function | SWSCI_SCIC_INDICATOR;
279 iowrite32(parm, &swsci->parm);
280 iowrite32(scic, &swsci->scic);
282 /* Ensure SCI event is selected and event trigger is cleared. */
283 pci_read_config_word(dev->pdev, PCI_SWSCI, &pci_swsci);
284 if (!(pci_swsci & PCI_SWSCI_SCISEL) || (pci_swsci & PCI_SWSCI_GSSCIE)) {
285 pci_swsci |= PCI_SWSCI_SCISEL;
286 pci_swsci &= ~PCI_SWSCI_GSSCIE;
287 pci_write_config_word(dev->pdev, PCI_SWSCI, pci_swsci);
290 /* Use event trigger to tell bios to check the mail. */
291 pci_swsci |= PCI_SWSCI_GSSCIE;
292 pci_write_config_word(dev->pdev, PCI_SWSCI, pci_swsci);
294 /* Poll for the result. */
295 #define C (((scic = ioread32(&swsci->scic)) & SWSCI_SCIC_INDICATOR) == 0)
296 if (wait_for(C, dslp)) {
297 DRM_DEBUG_DRIVER("SWSCI request timed out\n");
301 scic = (scic & SWSCI_SCIC_EXIT_STATUS_MASK) >>
302 SWSCI_SCIC_EXIT_STATUS_SHIFT;
304 /* Note: scic == 0 is an error! */
305 if (scic != SWSCI_SCIC_EXIT_STATUS_SUCCESS) {
306 DRM_DEBUG_DRIVER("SWSCI request error %u\n", scic);
311 *parm_out = ioread32(&swsci->parm);
318 #define DISPLAY_TYPE_CRT 0
319 #define DISPLAY_TYPE_TV 1
320 #define DISPLAY_TYPE_EXTERNAL_FLAT_PANEL 2
321 #define DISPLAY_TYPE_INTERNAL_FLAT_PANEL 3
323 int intel_opregion_notify_encoder(struct intel_encoder *intel_encoder,
326 struct drm_device *dev = intel_encoder->base.dev;
331 /* don't care about old stuff for now */
335 port = intel_ddi_get_encoder_port(intel_encoder);
336 if (port == PORT_E) {
346 switch (intel_encoder->type) {
347 case INTEL_OUTPUT_ANALOG:
348 type = DISPLAY_TYPE_CRT;
350 case INTEL_OUTPUT_UNKNOWN:
351 case INTEL_OUTPUT_DISPLAYPORT:
352 case INTEL_OUTPUT_HDMI:
353 type = DISPLAY_TYPE_EXTERNAL_FLAT_PANEL;
355 case INTEL_OUTPUT_EDP:
356 type = DISPLAY_TYPE_INTERNAL_FLAT_PANEL;
359 WARN_ONCE(1, "unsupported intel_encoder type %d\n",
360 intel_encoder->type);
364 parm |= type << (16 + port * 3);
366 return swsci(dev, SWSCI_SBCB_DISPLAY_POWER_STATE, parm, NULL);
369 static const struct {
370 pci_power_t pci_power_state;
372 } power_state_map[] = {
377 { PCI_D3cold, 0x04 },
380 int intel_opregion_notify_adapter(struct drm_device *dev, pci_power_t state)
387 for (i = 0; i < ARRAY_SIZE(power_state_map); i++) {
388 if (state == power_state_map[i].pci_power_state)
389 return swsci(dev, SWSCI_SBCB_ADAPTER_POWER_STATE,
390 power_state_map[i].parm, NULL);
396 static u32 asle_set_backlight(struct drm_device *dev, u32 bclp)
398 struct drm_i915_private *dev_priv = dev->dev_private;
399 struct intel_connector *intel_connector;
400 struct opregion_asle __iomem *asle = dev_priv->opregion.asle;
402 DRM_DEBUG_DRIVER("bclp = 0x%08x\n", bclp);
404 if (!(bclp & ASLE_BCLP_VALID))
405 return ASLC_BACKLIGHT_FAILED;
407 bclp &= ASLE_BCLP_MSK;
409 return ASLC_BACKLIGHT_FAILED;
411 mutex_lock(&dev->mode_config.mutex);
414 * Update backlight on all connectors that support backlight (usually
417 DRM_DEBUG_KMS("updating opregion backlight %d/255\n", bclp);
418 list_for_each_entry(intel_connector, &dev->mode_config.connector_list, base.head)
419 intel_panel_set_backlight(intel_connector, bclp, 255);
420 iowrite32(DIV_ROUND_UP(bclp * 100, 255) | ASLE_CBLV_VALID, &asle->cblv);
422 mutex_unlock(&dev->mode_config.mutex);
428 static u32 asle_set_als_illum(struct drm_device *dev, u32 alsi)
430 /* alsi is the current ALS reading in lux. 0 indicates below sensor
431 range, 0xffff indicates above sensor range. 1-0xfffe are valid */
432 DRM_DEBUG_DRIVER("Illum is not supported\n");
433 return ASLC_ALS_ILLUM_FAILED;
436 static u32 asle_set_pwm_freq(struct drm_device *dev, u32 pfmb)
438 DRM_DEBUG_DRIVER("PWM freq is not supported\n");
439 return ASLC_PWM_FREQ_FAILED;
442 static u32 asle_set_pfit(struct drm_device *dev, u32 pfit)
444 /* Panel fitting is currently controlled by the X code, so this is a
445 noop until modesetting support works fully */
446 DRM_DEBUG_DRIVER("Pfit is not supported\n");
447 return ASLC_PFIT_FAILED;
450 static u32 asle_set_supported_rotation_angles(struct drm_device *dev, u32 srot)
452 DRM_DEBUG_DRIVER("SROT is not supported\n");
453 return ASLC_ROTATION_ANGLES_FAILED;
456 static u32 asle_set_button_array(struct drm_device *dev, u32 iuer)
459 DRM_DEBUG_DRIVER("Button array event is not supported (nothing)\n");
460 if (iuer & ASLE_IUER_ROTATION_LOCK_BTN)
461 DRM_DEBUG_DRIVER("Button array event is not supported (rotation lock)\n");
462 if (iuer & ASLE_IUER_VOLUME_DOWN_BTN)
463 DRM_DEBUG_DRIVER("Button array event is not supported (volume down)\n");
464 if (iuer & ASLE_IUER_VOLUME_UP_BTN)
465 DRM_DEBUG_DRIVER("Button array event is not supported (volume up)\n");
466 if (iuer & ASLE_IUER_WINDOWS_BTN)
467 DRM_DEBUG_DRIVER("Button array event is not supported (windows)\n");
468 if (iuer & ASLE_IUER_POWER_BTN)
469 DRM_DEBUG_DRIVER("Button array event is not supported (power)\n");
471 return ASLC_BUTTON_ARRAY_FAILED;
474 static u32 asle_set_convertible(struct drm_device *dev, u32 iuer)
476 if (iuer & ASLE_IUER_CONVERTIBLE)
477 DRM_DEBUG_DRIVER("Convertible is not supported (clamshell)\n");
479 DRM_DEBUG_DRIVER("Convertible is not supported (slate)\n");
481 return ASLC_CONVERTIBLE_FAILED;
484 static u32 asle_set_docking(struct drm_device *dev, u32 iuer)
486 if (iuer & ASLE_IUER_DOCKING)
487 DRM_DEBUG_DRIVER("Docking is not supported (docked)\n");
489 DRM_DEBUG_DRIVER("Docking is not supported (undocked)\n");
491 return ASLC_DOCKING_FAILED;
494 static u32 asle_isct_state(struct drm_device *dev)
496 DRM_DEBUG_DRIVER("ISCT is not supported\n");
497 return ASLC_ISCT_STATE_FAILED;
500 static void asle_work(struct work_struct *work)
502 struct intel_opregion *opregion =
503 container_of(work, struct intel_opregion, asle_work);
504 struct drm_i915_private *dev_priv =
505 container_of(opregion, struct drm_i915_private, opregion);
506 struct drm_device *dev = dev_priv->dev;
507 struct opregion_asle __iomem *asle = dev_priv->opregion.asle;
514 aslc_req = ioread32(&asle->aslc);
516 if (!(aslc_req & ASLC_REQ_MSK)) {
517 DRM_DEBUG_DRIVER("No request on ASLC interrupt 0x%08x\n",
522 if (aslc_req & ASLC_SET_ALS_ILLUM)
523 aslc_stat |= asle_set_als_illum(dev, ioread32(&asle->alsi));
525 if (aslc_req & ASLC_SET_BACKLIGHT)
526 aslc_stat |= asle_set_backlight(dev, ioread32(&asle->bclp));
528 if (aslc_req & ASLC_SET_PFIT)
529 aslc_stat |= asle_set_pfit(dev, ioread32(&asle->pfit));
531 if (aslc_req & ASLC_SET_PWM_FREQ)
532 aslc_stat |= asle_set_pwm_freq(dev, ioread32(&asle->pfmb));
534 if (aslc_req & ASLC_SUPPORTED_ROTATION_ANGLES)
535 aslc_stat |= asle_set_supported_rotation_angles(dev,
536 ioread32(&asle->srot));
538 if (aslc_req & ASLC_BUTTON_ARRAY)
539 aslc_stat |= asle_set_button_array(dev, ioread32(&asle->iuer));
541 if (aslc_req & ASLC_CONVERTIBLE_INDICATOR)
542 aslc_stat |= asle_set_convertible(dev, ioread32(&asle->iuer));
544 if (aslc_req & ASLC_DOCKING_INDICATOR)
545 aslc_stat |= asle_set_docking(dev, ioread32(&asle->iuer));
547 if (aslc_req & ASLC_ISCT_STATE_CHANGE)
548 aslc_stat |= asle_isct_state(dev);
550 iowrite32(aslc_stat, &asle->aslc);
553 void intel_opregion_asle_intr(struct drm_device *dev)
555 struct drm_i915_private *dev_priv = dev->dev_private;
557 if (dev_priv->opregion.asle)
558 schedule_work(&dev_priv->opregion.asle_work);
561 #define ACPI_EV_DISPLAY_SWITCH (1<<0)
562 #define ACPI_EV_LID (1<<1)
563 #define ACPI_EV_DOCK (1<<2)
565 static struct intel_opregion *system_opregion;
568 static int intel_opregion_video_event(struct notifier_block *nb,
569 unsigned long val, void *data)
571 /* The only video events relevant to opregion are 0x80. These indicate
572 either a docking event, lid switch or display switch request. In
573 Linux, these are handled by the dock, button and video drivers.
576 struct opregion_acpi __iomem *acpi;
577 struct acpi_bus_event *event = data;
580 if (strcmp(event->device_class, ACPI_VIDEO_CLASS) != 0)
583 if (!system_opregion)
586 acpi = system_opregion->acpi;
588 if (event->type == 0x80 &&
589 (ioread32(&acpi->cevt) & 1) == 0)
592 iowrite32(0, &acpi->csts);
597 static struct notifier_block intel_opregion_notifier = {
598 .notifier_call = intel_opregion_video_event,
602 static int acpi_is_video_device(ACPI_HANDLE devh) {
604 if (ACPI_FAILURE(AcpiGetHandle(devh, "_DOD", &h)) ||
605 ACPI_FAILURE(AcpiGetHandle(devh, "_DOS", &h))) {
612 * Initialise the DIDL field in opregion. This passes a list of devices to
613 * the firmware. Values are defined by section B.4.2 of the ACPI specification
617 static void intel_didl_outputs(struct drm_device *dev)
619 struct drm_i915_private *dev_priv = dev->dev_private;
620 struct intel_opregion *opregion = &dev_priv->opregion;
621 struct drm_connector *connector;
622 ACPI_HANDLE handle, acpi_cdev, acpi_video_bus;
628 handle = acpi_get_handle(dev->dev);
632 if (acpi_is_video_device(handle))
633 acpi_video_bus = handle;
636 acpi_video_bus = NULL;
637 while (AcpiGetNextObject(ACPI_TYPE_DEVICE, handle, acpi_cdev,
638 &acpi_cdev) != AE_NOT_FOUND) {
639 if (acpi_is_video_device(acpi_cdev)) {
640 acpi_video_bus = acpi_cdev;
646 if (!acpi_video_bus) {
647 pr_warn("No ACPI video bus found\n");
652 while (AcpiGetNextObject(ACPI_TYPE_DEVICE, acpi_video_bus, acpi_cdev,
653 &acpi_cdev) != AE_NOT_FOUND) {
655 device_printf(dev->dev,
656 "More than 8 outputs detected via ACPI\n");
659 status = acpi_GetInteger(acpi_cdev, "_ADR", &device_id);
660 if (ACPI_SUCCESS(status)) {
663 iowrite32((u32)(device_id & 0x0f0f),
664 &opregion->acpi->didl[i]);
670 /* If fewer than 8 outputs, the list must be null terminated */
672 iowrite32(0, &opregion->acpi->didl[i]);
677 list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
678 int output_type = ACPI_OTHER_OUTPUT;
680 device_printf(dev->dev,
681 "More than 8 outputs in connector list\n");
684 switch (connector->connector_type) {
685 case DRM_MODE_CONNECTOR_VGA:
686 case DRM_MODE_CONNECTOR_DVIA:
687 output_type = ACPI_VGA_OUTPUT;
689 case DRM_MODE_CONNECTOR_Composite:
690 case DRM_MODE_CONNECTOR_SVIDEO:
691 case DRM_MODE_CONNECTOR_Component:
692 case DRM_MODE_CONNECTOR_9PinDIN:
693 output_type = ACPI_TV_OUTPUT;
695 case DRM_MODE_CONNECTOR_DVII:
696 case DRM_MODE_CONNECTOR_DVID:
697 case DRM_MODE_CONNECTOR_DisplayPort:
698 case DRM_MODE_CONNECTOR_HDMIA:
699 case DRM_MODE_CONNECTOR_HDMIB:
700 output_type = ACPI_DIGITAL_OUTPUT;
702 case DRM_MODE_CONNECTOR_LVDS:
703 output_type = ACPI_LVDS_OUTPUT;
706 temp = ioread32(&opregion->acpi->didl[i]);
707 iowrite32(temp | (1<<31) | output_type | i,
708 &opregion->acpi->didl[i]);
714 static void intel_setup_cadls(struct drm_device *dev)
716 struct drm_i915_private *dev_priv = dev->dev_private;
717 struct intel_opregion *opregion = &dev_priv->opregion;
721 /* Initialize the CADL field by duplicating the DIDL values.
722 * Technically, this is not always correct as display outputs may exist,
723 * but not active. This initialization is necessary for some Clevo
724 * laptops that check this field before processing the brightness and
725 * display switching hotkeys. Just like DIDL, CADL is NULL-terminated if
726 * there are less than eight devices. */
728 disp_id = ioread32(&opregion->acpi->didl[i]);
729 iowrite32(disp_id, &opregion->acpi->cadl[i]);
730 } while (++i < 8 && disp_id != 0);
733 void intel_opregion_init(struct drm_device *dev)
735 struct drm_i915_private *dev_priv = dev->dev_private;
736 struct intel_opregion *opregion = &dev_priv->opregion;
738 if (!opregion->header)
741 if (opregion->acpi) {
742 if (drm_core_check_feature(dev, DRIVER_MODESET)) {
743 intel_didl_outputs(dev);
744 intel_setup_cadls(dev);
747 /* Notify BIOS we are ready to handle ACPI video ext notifs.
748 * Right now, all the events are handled by the ACPI video module.
749 * We don't actually need to do anything with them. */
750 iowrite32(0, &opregion->acpi->csts);
751 iowrite32(1, &opregion->acpi->drdy);
753 system_opregion = opregion;
756 if (opregion->asle) {
757 iowrite32(ASLE_TCHE_BLC_EN, &opregion->asle->tche);
758 iowrite32(ASLE_ARDY_READY, &opregion->asle->ardy);
762 void intel_opregion_fini(struct drm_device *dev)
764 struct drm_i915_private *dev_priv = dev->dev_private;
765 struct intel_opregion *opregion = &dev_priv->opregion;
767 if (!opregion->header)
771 iowrite32(ASLE_ARDY_NOT_READY, &opregion->asle->ardy);
773 cancel_work_sync(&dev_priv->opregion.asle_work);
775 if (opregion->acpi) {
776 iowrite32(0, &opregion->acpi->drdy);
778 system_opregion = NULL;
781 /* just clear all opregion memory pointers now */
782 pmap_unmapdev((vm_offset_t)opregion->header, OPREGION_SIZE);
783 opregion->header = NULL;
784 opregion->acpi = NULL;
785 opregion->swsci = NULL;
786 opregion->asle = NULL;
787 opregion->vbt = NULL;
788 opregion->lid_state = NULL;
791 static void swsci_setup(struct drm_device *dev)
793 struct drm_i915_private *dev_priv = dev->dev_private;
794 struct intel_opregion *opregion = &dev_priv->opregion;
795 bool requested_callbacks = false;
798 /* Sub-function code 0 is okay, let's allow them. */
799 opregion->swsci_gbda_sub_functions = 1;
800 opregion->swsci_sbcb_sub_functions = 1;
802 /* We use GBDA to ask for supported GBDA calls. */
803 if (swsci(dev, SWSCI_GBDA_SUPPORTED_CALLS, 0, &tmp) == 0) {
804 /* make the bits match the sub-function codes */
806 opregion->swsci_gbda_sub_functions |= tmp;
810 * We also use GBDA to ask for _requested_ SBCB callbacks. The driver
811 * must not call interfaces that are not specifically requested by the
814 if (swsci(dev, SWSCI_GBDA_REQUESTED_CALLBACKS, 0, &tmp) == 0) {
815 /* here, the bits already match sub-function codes */
816 opregion->swsci_sbcb_sub_functions |= tmp;
817 requested_callbacks = true;
821 * But we use SBCB to ask for _supported_ SBCB calls. This does not mean
822 * the callback is _requested_. But we still can't call interfaces that
825 if (swsci(dev, SWSCI_SBCB_SUPPORTED_CALLBACKS, 0, &tmp) == 0) {
826 /* make the bits match the sub-function codes */
827 u32 low = tmp & 0x7ff;
828 u32 high = tmp & ~0xfff; /* bit 11 is reserved */
829 tmp = (high << 4) | (low << 1) | 1;
831 /* best guess what to do with supported wrt requested */
832 if (requested_callbacks) {
833 u32 req = opregion->swsci_sbcb_sub_functions;
834 if ((req & tmp) != req)
835 DRM_DEBUG_DRIVER("SWSCI BIOS requested (%08x) SBCB callbacks that are not supported (%08x)\n", req, tmp);
836 /* XXX: for now, trust the requested callbacks */
837 /* opregion->swsci_sbcb_sub_functions &= tmp; */
839 opregion->swsci_sbcb_sub_functions |= tmp;
843 DRM_DEBUG_DRIVER("SWSCI GBDA callbacks %08x, SBCB callbacks %08x\n",
844 opregion->swsci_gbda_sub_functions,
845 opregion->swsci_sbcb_sub_functions);
848 int intel_opregion_setup(struct drm_device *dev)
850 struct drm_i915_private *dev_priv = dev->dev_private;
851 struct intel_opregion *opregion = &dev_priv->opregion;
854 char buf[sizeof(OPREGION_SIGNATURE)];
857 pci_read_config_dword(dev->pdev, PCI_ASLS, &asls);
858 DRM_DEBUG_DRIVER("graphic opregion physical addr: 0x%x\n", asls);
860 DRM_DEBUG_DRIVER("ACPI OpRegion not supported!\n");
864 #define MAX_DSLP 1500
867 INIT_WORK(&opregion->asle_work, asle_work);
870 base = (void *)pmap_mapbios(asls, OPREGION_SIZE);
874 memcpy_fromio(buf, base, sizeof(buf));
876 if (memcmp(buf, OPREGION_SIGNATURE, 16)) {
877 DRM_DEBUG_DRIVER("opregion signature mismatch\n");
881 opregion->header = (struct opregion_header *)base;
882 opregion->vbt = base + OPREGION_VBT_OFFSET;
884 opregion->lid_state = (u32 *)(base + ACPI_CLID);
886 mboxes = ioread32(&opregion->header->mboxes);
887 if (mboxes & MBOX_ACPI) {
888 DRM_DEBUG_DRIVER("Public ACPI methods supported\n");
889 opregion->acpi = (struct opregion_acpi *)(base + OPREGION_ACPI_OFFSET);
892 if (mboxes & MBOX_SWSCI) {
893 DRM_DEBUG_DRIVER("SWSCI supported\n");
894 opregion->swsci = (struct opregion_swsci *)(base + OPREGION_SWSCI_OFFSET);
897 if (mboxes & MBOX_ASLE) {
898 DRM_DEBUG_DRIVER("ASLE supported\n");
899 opregion->asle = (struct opregion_asle *)(base + OPREGION_ASLE_OFFSET);
901 iowrite32(ASLE_ARDY_NOT_READY, &opregion->asle->ardy);
907 pmap_unmapdev((vm_offset_t)base, OPREGION_SIZE);