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 #include <linux/acpi.h>
29 #include <acpi/video.h>
32 #include <drm/i915_drm.h>
34 #include "intel_drv.h"
38 #define PCI_SWSCI 0xe8
39 #define PCI_SWSCI_SCISEL (1 << 15)
40 #define PCI_SWSCI_GSSCIE (1 << 0)
42 #define OPREGION_HEADER_OFFSET 0
43 #define OPREGION_ACPI_OFFSET 0x100
44 #define ACPI_CLID 0x01ac /* current lid state indicator */
45 #define ACPI_CDCK 0x01b0 /* current docking state indicator */
46 #define OPREGION_SWSCI_OFFSET 0x200
47 #define OPREGION_ASLE_OFFSET 0x300
48 #define OPREGION_VBT_OFFSET 0x400
50 #define OPREGION_SIGNATURE "IntelGraphicsMem"
51 #define MBOX_ACPI (1<<0)
52 #define MBOX_SWSCI (1<<1)
53 #define MBOX_ASLE (1<<2)
54 #define MBOX_ASLE_EXT (1<<4)
56 struct opregion_header {
70 /* OpRegion mailbox #1: public ACPI methods */
71 struct opregion_acpi {
72 u32 drdy; /* driver readiness */
73 u32 csts; /* notification status */
74 u32 cevt; /* current event */
76 u32 didl[8]; /* supported display devices ID list */
77 u32 cpdl[8]; /* currently presented display list */
78 u32 cadl[8]; /* currently active display list */
79 u32 nadl[8]; /* next active devices list */
80 u32 aslp; /* ASL sleep time-out */
81 u32 tidx; /* toggle table index */
82 u32 chpd; /* current hotplug enable indicator */
83 u32 clid; /* current lid state*/
84 u32 cdck; /* current docking state */
85 u32 sxsw; /* Sx state resume */
86 u32 evts; /* ASL supported events */
87 u32 cnot; /* current OS notification */
88 u32 nrdy; /* driver status */
89 u32 did2[7]; /* extended supported display devices ID list */
90 u32 cpd2[7]; /* extended attached display devices list */
94 /* OpRegion mailbox #2: SWSCI */
95 struct opregion_swsci {
96 u32 scic; /* SWSCI command|status|data */
97 u32 parm; /* command parameters */
98 u32 dslp; /* driver sleep time-out */
102 /* OpRegion mailbox #3: ASLE */
103 struct opregion_asle {
104 u32 ardy; /* driver readiness */
105 u32 aslc; /* ASLE interrupt command */
106 u32 tche; /* technology enabled indicator */
107 u32 alsi; /* current ALS illuminance reading */
108 u32 bclp; /* backlight brightness to set */
109 u32 pfit; /* panel fitting state */
110 u32 cblv; /* current brightness level */
111 u16 bclm[20]; /* backlight level duty cycle mapping table */
112 u32 cpfm; /* current panel fitting mode */
113 u32 epfm; /* enabled panel fitting modes */
114 u8 plut[74]; /* panel LUT and identifier */
115 u32 pfmb; /* PWM freq and min brightness */
116 u32 cddv; /* color correction default values */
117 u32 pcft; /* power conservation features */
118 u32 srot; /* supported rotation angles */
119 u32 iuer; /* IUER events */
126 /* Driver readiness indicator */
127 #define ASLE_ARDY_READY (1 << 0)
128 #define ASLE_ARDY_NOT_READY (0 << 0)
130 /* ASLE Interrupt Command (ASLC) bits */
131 #define ASLC_SET_ALS_ILLUM (1 << 0)
132 #define ASLC_SET_BACKLIGHT (1 << 1)
133 #define ASLC_SET_PFIT (1 << 2)
134 #define ASLC_SET_PWM_FREQ (1 << 3)
135 #define ASLC_SUPPORTED_ROTATION_ANGLES (1 << 4)
136 #define ASLC_BUTTON_ARRAY (1 << 5)
137 #define ASLC_CONVERTIBLE_INDICATOR (1 << 6)
138 #define ASLC_DOCKING_INDICATOR (1 << 7)
139 #define ASLC_ISCT_STATE_CHANGE (1 << 8)
140 #define ASLC_REQ_MSK 0x1ff
142 #define ASLC_ALS_ILLUM_FAILED (1 << 10)
143 #define ASLC_BACKLIGHT_FAILED (1 << 12)
144 #define ASLC_PFIT_FAILED (1 << 14)
145 #define ASLC_PWM_FREQ_FAILED (1 << 16)
146 #define ASLC_ROTATION_ANGLES_FAILED (1 << 18)
147 #define ASLC_BUTTON_ARRAY_FAILED (1 << 20)
148 #define ASLC_CONVERTIBLE_FAILED (1 << 22)
149 #define ASLC_DOCKING_FAILED (1 << 24)
150 #define ASLC_ISCT_STATE_FAILED (1 << 26)
152 /* Technology enabled indicator */
153 #define ASLE_TCHE_ALS_EN (1 << 0)
154 #define ASLE_TCHE_BLC_EN (1 << 1)
155 #define ASLE_TCHE_PFIT_EN (1 << 2)
156 #define ASLE_TCHE_PFMB_EN (1 << 3)
158 /* ASLE backlight brightness to set */
159 #define ASLE_BCLP_VALID (1<<31)
160 #define ASLE_BCLP_MSK (~(1<<31))
162 /* ASLE panel fitting request */
163 #define ASLE_PFIT_VALID (1<<31)
164 #define ASLE_PFIT_CENTER (1<<0)
165 #define ASLE_PFIT_STRETCH_TEXT (1<<1)
166 #define ASLE_PFIT_STRETCH_GFX (1<<2)
168 /* PWM frequency and minimum brightness */
169 #define ASLE_PFMB_BRIGHTNESS_MASK (0xff)
170 #define ASLE_PFMB_BRIGHTNESS_VALID (1<<8)
171 #define ASLE_PFMB_PWM_MASK (0x7ffffe00)
172 #define ASLE_PFMB_PWM_VALID (1<<31)
174 #define ASLE_CBLV_VALID (1<<31)
177 #define ASLE_IUER_DOCKING (1 << 7)
178 #define ASLE_IUER_CONVERTIBLE (1 << 6)
179 #define ASLE_IUER_ROTATION_LOCK_BTN (1 << 4)
180 #define ASLE_IUER_VOLUME_DOWN_BTN (1 << 3)
181 #define ASLE_IUER_VOLUME_UP_BTN (1 << 2)
182 #define ASLE_IUER_WINDOWS_BTN (1 << 1)
183 #define ASLE_IUER_POWER_BTN (1 << 0)
185 /* Software System Control Interrupt (SWSCI) */
186 #define SWSCI_SCIC_INDICATOR (1 << 0)
187 #define SWSCI_SCIC_MAIN_FUNCTION_SHIFT 1
188 #define SWSCI_SCIC_MAIN_FUNCTION_MASK (0xf << 1)
189 #define SWSCI_SCIC_SUB_FUNCTION_SHIFT 8
190 #define SWSCI_SCIC_SUB_FUNCTION_MASK (0xff << 8)
191 #define SWSCI_SCIC_EXIT_PARAMETER_SHIFT 8
192 #define SWSCI_SCIC_EXIT_PARAMETER_MASK (0xff << 8)
193 #define SWSCI_SCIC_EXIT_STATUS_SHIFT 5
194 #define SWSCI_SCIC_EXIT_STATUS_MASK (7 << 5)
195 #define SWSCI_SCIC_EXIT_STATUS_SUCCESS 1
197 #define SWSCI_FUNCTION_CODE(main, sub) \
198 ((main) << SWSCI_SCIC_MAIN_FUNCTION_SHIFT | \
199 (sub) << SWSCI_SCIC_SUB_FUNCTION_SHIFT)
201 /* SWSCI: Get BIOS Data (GBDA) */
203 #define SWSCI_GBDA_SUPPORTED_CALLS SWSCI_FUNCTION_CODE(SWSCI_GBDA, 0)
204 #define SWSCI_GBDA_REQUESTED_CALLBACKS SWSCI_FUNCTION_CODE(SWSCI_GBDA, 1)
205 #define SWSCI_GBDA_BOOT_DISPLAY_PREF SWSCI_FUNCTION_CODE(SWSCI_GBDA, 4)
206 #define SWSCI_GBDA_PANEL_DETAILS SWSCI_FUNCTION_CODE(SWSCI_GBDA, 5)
207 #define SWSCI_GBDA_TV_STANDARD SWSCI_FUNCTION_CODE(SWSCI_GBDA, 6)
208 #define SWSCI_GBDA_INTERNAL_GRAPHICS SWSCI_FUNCTION_CODE(SWSCI_GBDA, 7)
209 #define SWSCI_GBDA_SPREAD_SPECTRUM SWSCI_FUNCTION_CODE(SWSCI_GBDA, 10)
211 /* SWSCI: System BIOS Callbacks (SBCB) */
213 #define SWSCI_SBCB_SUPPORTED_CALLBACKS SWSCI_FUNCTION_CODE(SWSCI_SBCB, 0)
214 #define SWSCI_SBCB_INIT_COMPLETION SWSCI_FUNCTION_CODE(SWSCI_SBCB, 1)
215 #define SWSCI_SBCB_PRE_HIRES_SET_MODE SWSCI_FUNCTION_CODE(SWSCI_SBCB, 3)
216 #define SWSCI_SBCB_POST_HIRES_SET_MODE SWSCI_FUNCTION_CODE(SWSCI_SBCB, 4)
217 #define SWSCI_SBCB_DISPLAY_SWITCH SWSCI_FUNCTION_CODE(SWSCI_SBCB, 5)
218 #define SWSCI_SBCB_SET_TV_FORMAT SWSCI_FUNCTION_CODE(SWSCI_SBCB, 6)
219 #define SWSCI_SBCB_ADAPTER_POWER_STATE SWSCI_FUNCTION_CODE(SWSCI_SBCB, 7)
220 #define SWSCI_SBCB_DISPLAY_POWER_STATE SWSCI_FUNCTION_CODE(SWSCI_SBCB, 8)
221 #define SWSCI_SBCB_SET_BOOT_DISPLAY SWSCI_FUNCTION_CODE(SWSCI_SBCB, 9)
222 #define SWSCI_SBCB_SET_PANEL_DETAILS SWSCI_FUNCTION_CODE(SWSCI_SBCB, 10)
223 #define SWSCI_SBCB_SET_INTERNAL_GFX SWSCI_FUNCTION_CODE(SWSCI_SBCB, 11)
224 #define SWSCI_SBCB_POST_HIRES_TO_DOS_FS SWSCI_FUNCTION_CODE(SWSCI_SBCB, 16)
225 #define SWSCI_SBCB_SUSPEND_RESUME SWSCI_FUNCTION_CODE(SWSCI_SBCB, 17)
226 #define SWSCI_SBCB_SET_SPREAD_SPECTRUM SWSCI_FUNCTION_CODE(SWSCI_SBCB, 18)
227 #define SWSCI_SBCB_POST_VBE_PM SWSCI_FUNCTION_CODE(SWSCI_SBCB, 19)
228 #define SWSCI_SBCB_ENABLE_DISABLE_AUDIO SWSCI_FUNCTION_CODE(SWSCI_SBCB, 21)
230 #define ACPI_OTHER_OUTPUT (0<<8)
231 #define ACPI_VGA_OUTPUT (1<<8)
232 #define ACPI_TV_OUTPUT (2<<8)
233 #define ACPI_DIGITAL_OUTPUT (3<<8)
234 #define ACPI_LVDS_OUTPUT (4<<8)
236 #define MAX_DSLP 1500
239 static int swsci(struct drm_device *dev, u32 function, u32 parm, u32 *parm_out)
241 struct drm_i915_private *dev_priv = dev->dev_private;
242 struct opregion_swsci *swsci = dev_priv->opregion.swsci;
243 u32 main_function, sub_function, scic;
250 main_function = (function & SWSCI_SCIC_MAIN_FUNCTION_MASK) >>
251 SWSCI_SCIC_MAIN_FUNCTION_SHIFT;
252 sub_function = (function & SWSCI_SCIC_SUB_FUNCTION_MASK) >>
253 SWSCI_SCIC_SUB_FUNCTION_SHIFT;
255 /* Check if we can call the function. See swsci_setup for details. */
256 if (main_function == SWSCI_SBCB) {
257 if ((dev_priv->opregion.swsci_sbcb_sub_functions &
258 (1 << sub_function)) == 0)
260 } else if (main_function == SWSCI_GBDA) {
261 if ((dev_priv->opregion.swsci_gbda_sub_functions &
262 (1 << sub_function)) == 0)
266 /* Driver sleep timeout in ms. */
269 /* The spec says 2ms should be the default, but it's too small
270 * for some machines. */
272 } else if (dslp > MAX_DSLP) {
273 /* Hey bios, trust must be earned. */
274 DRM_INFO_ONCE("ACPI BIOS requests an excessive sleep of %u ms, "
275 "using %u ms instead\n", dslp, MAX_DSLP);
279 /* The spec tells us to do this, but we are the only user... */
281 if (scic & SWSCI_SCIC_INDICATOR) {
282 DRM_DEBUG_DRIVER("SWSCI request already in progress\n");
286 scic = function | SWSCI_SCIC_INDICATOR;
291 /* Ensure SCI event is selected and event trigger is cleared. */
292 pci_read_config_word(dev->pdev, PCI_SWSCI, &pci_swsci);
293 if (!(pci_swsci & PCI_SWSCI_SCISEL) || (pci_swsci & PCI_SWSCI_GSSCIE)) {
294 pci_swsci |= PCI_SWSCI_SCISEL;
295 pci_swsci &= ~PCI_SWSCI_GSSCIE;
296 pci_write_config_word(dev->pdev, PCI_SWSCI, pci_swsci);
299 /* Use event trigger to tell bios to check the mail. */
300 pci_swsci |= PCI_SWSCI_GSSCIE;
301 pci_write_config_word(dev->pdev, PCI_SWSCI, pci_swsci);
303 /* Poll for the result. */
304 #define C (((scic = swsci->scic) & SWSCI_SCIC_INDICATOR) == 0)
305 if (wait_for(C, dslp)) {
306 DRM_DEBUG_DRIVER("SWSCI request timed out\n");
310 scic = (scic & SWSCI_SCIC_EXIT_STATUS_MASK) >>
311 SWSCI_SCIC_EXIT_STATUS_SHIFT;
313 /* Note: scic == 0 is an error! */
314 if (scic != SWSCI_SCIC_EXIT_STATUS_SUCCESS) {
315 DRM_DEBUG_DRIVER("SWSCI request error %u\n", scic);
320 *parm_out = swsci->parm;
327 #define DISPLAY_TYPE_CRT 0
328 #define DISPLAY_TYPE_TV 1
329 #define DISPLAY_TYPE_EXTERNAL_FLAT_PANEL 2
330 #define DISPLAY_TYPE_INTERNAL_FLAT_PANEL 3
332 int intel_opregion_notify_encoder(struct intel_encoder *intel_encoder,
335 struct drm_device *dev = intel_encoder->base.dev;
340 /* don't care about old stuff for now */
344 if (intel_encoder->type == INTEL_OUTPUT_DSI)
347 port = intel_ddi_get_encoder_port(intel_encoder);
349 if (port == PORT_E) {
359 switch (intel_encoder->type) {
360 case INTEL_OUTPUT_ANALOG:
361 type = DISPLAY_TYPE_CRT;
363 case INTEL_OUTPUT_UNKNOWN:
364 case INTEL_OUTPUT_DISPLAYPORT:
365 case INTEL_OUTPUT_HDMI:
366 case INTEL_OUTPUT_DP_MST:
367 type = DISPLAY_TYPE_EXTERNAL_FLAT_PANEL;
369 case INTEL_OUTPUT_EDP:
370 case INTEL_OUTPUT_DSI:
371 type = DISPLAY_TYPE_INTERNAL_FLAT_PANEL;
374 WARN_ONCE(1, "unsupported intel_encoder type %d\n",
375 intel_encoder->type);
379 parm |= type << (16 + port * 3);
381 return swsci(dev, SWSCI_SBCB_DISPLAY_POWER_STATE, parm, NULL);
384 static const struct {
385 pci_power_t pci_power_state;
387 } power_state_map[] = {
392 { PCI_D3cold, 0x04 },
395 int intel_opregion_notify_adapter(struct drm_device *dev, pci_power_t state)
402 for (i = 0; i < ARRAY_SIZE(power_state_map); i++) {
403 if (state == power_state_map[i].pci_power_state)
404 return swsci(dev, SWSCI_SBCB_ADAPTER_POWER_STATE,
405 power_state_map[i].parm, NULL);
411 static u32 asle_set_backlight(struct drm_device *dev, u32 bclp)
413 struct drm_i915_private *dev_priv = dev->dev_private;
414 struct intel_connector *intel_connector;
415 struct opregion_asle *asle = dev_priv->opregion.asle;
417 DRM_DEBUG_DRIVER("bclp = 0x%08x\n", bclp);
419 if (acpi_video_get_backlight_type() == acpi_backlight_native) {
420 DRM_DEBUG_KMS("opregion backlight request ignored\n");
424 if (!(bclp & ASLE_BCLP_VALID))
425 return ASLC_BACKLIGHT_FAILED;
427 bclp &= ASLE_BCLP_MSK;
429 return ASLC_BACKLIGHT_FAILED;
431 drm_modeset_lock(&dev->mode_config.connection_mutex, NULL);
434 * Update backlight on all connectors that support backlight (usually
437 DRM_DEBUG_KMS("updating opregion backlight %d/255\n", bclp);
438 list_for_each_entry(intel_connector, &dev->mode_config.connector_list, base.head)
439 intel_panel_set_backlight_acpi(intel_connector, bclp, 255);
440 asle->cblv = DIV_ROUND_UP(bclp * 100, 255) | ASLE_CBLV_VALID;
442 drm_modeset_unlock(&dev->mode_config.connection_mutex);
448 static u32 asle_set_als_illum(struct drm_device *dev, u32 alsi)
450 /* alsi is the current ALS reading in lux. 0 indicates below sensor
451 range, 0xffff indicates above sensor range. 1-0xfffe are valid */
452 DRM_DEBUG_DRIVER("Illum is not supported\n");
453 return ASLC_ALS_ILLUM_FAILED;
456 static u32 asle_set_pwm_freq(struct drm_device *dev, u32 pfmb)
458 DRM_DEBUG_DRIVER("PWM freq is not supported\n");
459 return ASLC_PWM_FREQ_FAILED;
462 static u32 asle_set_pfit(struct drm_device *dev, u32 pfit)
464 /* Panel fitting is currently controlled by the X code, so this is a
465 noop until modesetting support works fully */
466 DRM_DEBUG_DRIVER("Pfit is not supported\n");
467 return ASLC_PFIT_FAILED;
470 static u32 asle_set_supported_rotation_angles(struct drm_device *dev, u32 srot)
472 DRM_DEBUG_DRIVER("SROT is not supported\n");
473 return ASLC_ROTATION_ANGLES_FAILED;
476 static u32 asle_set_button_array(struct drm_device *dev, u32 iuer)
479 DRM_DEBUG_DRIVER("Button array event is not supported (nothing)\n");
480 if (iuer & ASLE_IUER_ROTATION_LOCK_BTN)
481 DRM_DEBUG_DRIVER("Button array event is not supported (rotation lock)\n");
482 if (iuer & ASLE_IUER_VOLUME_DOWN_BTN)
483 DRM_DEBUG_DRIVER("Button array event is not supported (volume down)\n");
484 if (iuer & ASLE_IUER_VOLUME_UP_BTN)
485 DRM_DEBUG_DRIVER("Button array event is not supported (volume up)\n");
486 if (iuer & ASLE_IUER_WINDOWS_BTN)
487 DRM_DEBUG_DRIVER("Button array event is not supported (windows)\n");
488 if (iuer & ASLE_IUER_POWER_BTN)
489 DRM_DEBUG_DRIVER("Button array event is not supported (power)\n");
491 return ASLC_BUTTON_ARRAY_FAILED;
494 static u32 asle_set_convertible(struct drm_device *dev, u32 iuer)
496 if (iuer & ASLE_IUER_CONVERTIBLE)
497 DRM_DEBUG_DRIVER("Convertible is not supported (clamshell)\n");
499 DRM_DEBUG_DRIVER("Convertible is not supported (slate)\n");
501 return ASLC_CONVERTIBLE_FAILED;
504 static u32 asle_set_docking(struct drm_device *dev, u32 iuer)
506 if (iuer & ASLE_IUER_DOCKING)
507 DRM_DEBUG_DRIVER("Docking is not supported (docked)\n");
509 DRM_DEBUG_DRIVER("Docking is not supported (undocked)\n");
511 return ASLC_DOCKING_FAILED;
514 static u32 asle_isct_state(struct drm_device *dev)
516 DRM_DEBUG_DRIVER("ISCT is not supported\n");
517 return ASLC_ISCT_STATE_FAILED;
520 static void asle_work(struct work_struct *work)
522 struct intel_opregion *opregion =
523 container_of(work, struct intel_opregion, asle_work);
524 struct drm_i915_private *dev_priv =
525 container_of(opregion, struct drm_i915_private, opregion);
526 struct drm_device *dev = dev_priv->dev;
527 struct opregion_asle *asle = dev_priv->opregion.asle;
534 aslc_req = asle->aslc;
536 if (!(aslc_req & ASLC_REQ_MSK)) {
537 DRM_DEBUG_DRIVER("No request on ASLC interrupt 0x%08x\n",
542 if (aslc_req & ASLC_SET_ALS_ILLUM)
543 aslc_stat |= asle_set_als_illum(dev, asle->alsi);
545 if (aslc_req & ASLC_SET_BACKLIGHT)
546 aslc_stat |= asle_set_backlight(dev, asle->bclp);
548 if (aslc_req & ASLC_SET_PFIT)
549 aslc_stat |= asle_set_pfit(dev, asle->pfit);
551 if (aslc_req & ASLC_SET_PWM_FREQ)
552 aslc_stat |= asle_set_pwm_freq(dev, asle->pfmb);
554 if (aslc_req & ASLC_SUPPORTED_ROTATION_ANGLES)
555 aslc_stat |= asle_set_supported_rotation_angles(dev,
558 if (aslc_req & ASLC_BUTTON_ARRAY)
559 aslc_stat |= asle_set_button_array(dev, asle->iuer);
561 if (aslc_req & ASLC_CONVERTIBLE_INDICATOR)
562 aslc_stat |= asle_set_convertible(dev, asle->iuer);
564 if (aslc_req & ASLC_DOCKING_INDICATOR)
565 aslc_stat |= asle_set_docking(dev, asle->iuer);
567 if (aslc_req & ASLC_ISCT_STATE_CHANGE)
568 aslc_stat |= asle_isct_state(dev);
570 asle->aslc = aslc_stat;
573 void intel_opregion_asle_intr(struct drm_device *dev)
575 struct drm_i915_private *dev_priv = dev->dev_private;
577 if (dev_priv->opregion.asle)
578 schedule_work(&dev_priv->opregion.asle_work);
581 #define ACPI_EV_DISPLAY_SWITCH (1<<0)
582 #define ACPI_EV_LID (1<<1)
583 #define ACPI_EV_DOCK (1<<2)
585 static struct intel_opregion *system_opregion;
587 static int intel_opregion_video_event(struct notifier_block *nb,
588 unsigned long val, void *data)
590 /* The only video events relevant to opregion are 0x80. These indicate
591 either a docking event, lid switch or display switch request. In
592 Linux, these are handled by the dock, button and video drivers.
595 struct acpi_bus_event *event = data;
596 struct opregion_acpi *acpi;
599 if (strcmp(event->device_class, ACPI_VIDEO_CLASS) != 0)
602 if (!system_opregion)
605 acpi = system_opregion->acpi;
607 if (event->type == 0x80 && ((acpi->cevt & 1) == 0))
615 static struct notifier_block intel_opregion_notifier = {
616 .notifier_call = intel_opregion_video_event,
620 * Initialise the DIDL field in opregion. This passes a list of devices to
621 * the firmware. Values are defined by section B.4.2 of the ACPI specification
625 static u32 get_did(struct intel_opregion *opregion, int i)
629 if (i < ARRAY_SIZE(opregion->acpi->didl)) {
630 did = opregion->acpi->didl[i];
632 i -= ARRAY_SIZE(opregion->acpi->didl);
634 if (WARN_ON(i >= ARRAY_SIZE(opregion->acpi->did2)))
637 did = opregion->acpi->did2[i];
643 static void set_did(struct intel_opregion *opregion, int i, u32 val)
645 if (i < ARRAY_SIZE(opregion->acpi->didl)) {
646 opregion->acpi->didl[i] = val;
648 i -= ARRAY_SIZE(opregion->acpi->didl);
650 if (WARN_ON(i >= ARRAY_SIZE(opregion->acpi->did2)))
653 opregion->acpi->did2[i] = val;
657 static void intel_didl_outputs(struct drm_device *dev)
659 struct drm_i915_private *dev_priv = dev->dev_private;
660 struct intel_opregion *opregion = &dev_priv->opregion;
661 struct drm_connector *connector;
663 struct acpi_device *acpi_dev, *acpi_cdev, *acpi_video_bus = NULL;
664 unsigned long long device_id;
666 u32 temp, max_outputs;
669 handle = ACPI_HANDLE(&dev->pdev->dev);
670 if (!handle || acpi_bus_get_device(handle, &acpi_dev))
673 if (acpi_is_video_device(handle))
674 acpi_video_bus = acpi_dev;
676 list_for_each_entry(acpi_cdev, &acpi_dev->children, node) {
677 if (acpi_is_video_device(acpi_cdev->handle)) {
678 acpi_video_bus = acpi_cdev;
684 if (!acpi_video_bus) {
685 DRM_DEBUG_KMS("No ACPI video bus found\n");
690 * In theory, did2, the extended didl, gets added at opregion version
691 * 3.0. In practice, however, we're supposed to set it for earlier
692 * versions as well, since a BIOS that doesn't understand did2 should
693 * not look at it anyway. Use a variable so we can tweak this if a need
696 max_outputs = ARRAY_SIZE(opregion->acpi->didl) +
697 ARRAY_SIZE(opregion->acpi->did2);
699 list_for_each_entry(acpi_cdev, &acpi_video_bus->children, node) {
700 if (i >= max_outputs) {
701 DRM_DEBUG_KMS("More than %u outputs detected via ACPI\n",
705 status = acpi_evaluate_integer(acpi_cdev->handle, "_ADR",
707 if (ACPI_SUCCESS(status)) {
710 set_did(opregion, i++, (u32)(device_id & 0x0f0f));
715 DRM_DEBUG_KMS("%d outputs detected\n", i);
717 /* If fewer than max outputs, the list must be null terminated */
719 set_did(opregion, i, 0);
724 list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
725 int output_type = ACPI_OTHER_OUTPUT;
726 if (i >= max_outputs) {
727 DRM_DEBUG_KMS("More than %u outputs in connector list\n",
731 switch (connector->connector_type) {
732 case DRM_MODE_CONNECTOR_VGA:
733 case DRM_MODE_CONNECTOR_DVIA:
734 output_type = ACPI_VGA_OUTPUT;
736 case DRM_MODE_CONNECTOR_Composite:
737 case DRM_MODE_CONNECTOR_SVIDEO:
738 case DRM_MODE_CONNECTOR_Component:
739 case DRM_MODE_CONNECTOR_9PinDIN:
740 output_type = ACPI_TV_OUTPUT;
742 case DRM_MODE_CONNECTOR_DVII:
743 case DRM_MODE_CONNECTOR_DVID:
744 case DRM_MODE_CONNECTOR_DisplayPort:
745 case DRM_MODE_CONNECTOR_HDMIA:
746 case DRM_MODE_CONNECTOR_HDMIB:
747 output_type = ACPI_DIGITAL_OUTPUT;
749 case DRM_MODE_CONNECTOR_LVDS:
750 output_type = ACPI_LVDS_OUTPUT;
753 temp = get_did(opregion, i);
754 set_did(opregion, i, temp | (1 << 31) | output_type | i);
760 static void intel_setup_cadls(struct drm_device *dev)
762 struct drm_i915_private *dev_priv = dev->dev_private;
763 struct intel_opregion *opregion = &dev_priv->opregion;
767 /* Initialize the CADL field by duplicating the DIDL values.
768 * Technically, this is not always correct as display outputs may exist,
769 * but not active. This initialization is necessary for some Clevo
770 * laptops that check this field before processing the brightness and
771 * display switching hotkeys. Just like DIDL, CADL is NULL-terminated if
772 * there are less than eight devices. */
774 disp_id = get_did(opregion, i);
775 opregion->acpi->cadl[i] = disp_id;
776 } while (++i < 8 && disp_id != 0);
779 void intel_opregion_init(struct drm_device *dev)
781 struct drm_i915_private *dev_priv = dev->dev_private;
782 struct intel_opregion *opregion = &dev_priv->opregion;
784 if (!opregion->header)
787 if (opregion->acpi) {
788 intel_didl_outputs(dev);
789 intel_setup_cadls(dev);
791 /* Notify BIOS we are ready to handle ACPI video ext notifs.
792 * Right now, all the events are handled by the ACPI video module.
793 * We don't actually need to do anything with them. */
794 opregion->acpi->csts = 0;
795 opregion->acpi->drdy = 1;
797 system_opregion = opregion;
798 register_acpi_notifier(&intel_opregion_notifier);
801 if (opregion->asle) {
802 opregion->asle->tche = ASLE_TCHE_BLC_EN;
803 opregion->asle->ardy = ASLE_ARDY_READY;
807 void intel_opregion_fini(struct drm_device *dev)
809 struct drm_i915_private *dev_priv = dev->dev_private;
810 struct intel_opregion *opregion = &dev_priv->opregion;
812 if (!opregion->header)
816 opregion->asle->ardy = ASLE_ARDY_NOT_READY;
818 cancel_work_sync(&dev_priv->opregion.asle_work);
820 if (opregion->acpi) {
821 opregion->acpi->drdy = 0;
823 system_opregion = NULL;
824 unregister_acpi_notifier(&intel_opregion_notifier);
827 /* just clear all opregion memory pointers now */
828 memunmap(opregion->header);
829 opregion->header = NULL;
830 opregion->acpi = NULL;
831 opregion->swsci = NULL;
832 opregion->asle = NULL;
833 opregion->vbt = NULL;
834 opregion->lid_state = NULL;
837 static void swsci_setup(struct drm_device *dev)
839 struct drm_i915_private *dev_priv = dev->dev_private;
840 struct intel_opregion *opregion = &dev_priv->opregion;
841 bool requested_callbacks = false;
844 /* Sub-function code 0 is okay, let's allow them. */
845 opregion->swsci_gbda_sub_functions = 1;
846 opregion->swsci_sbcb_sub_functions = 1;
848 /* We use GBDA to ask for supported GBDA calls. */
849 if (swsci(dev, SWSCI_GBDA_SUPPORTED_CALLS, 0, &tmp) == 0) {
850 /* make the bits match the sub-function codes */
852 opregion->swsci_gbda_sub_functions |= tmp;
856 * We also use GBDA to ask for _requested_ SBCB callbacks. The driver
857 * must not call interfaces that are not specifically requested by the
860 if (swsci(dev, SWSCI_GBDA_REQUESTED_CALLBACKS, 0, &tmp) == 0) {
861 /* here, the bits already match sub-function codes */
862 opregion->swsci_sbcb_sub_functions |= tmp;
863 requested_callbacks = true;
867 * But we use SBCB to ask for _supported_ SBCB calls. This does not mean
868 * the callback is _requested_. But we still can't call interfaces that
871 if (swsci(dev, SWSCI_SBCB_SUPPORTED_CALLBACKS, 0, &tmp) == 0) {
872 /* make the bits match the sub-function codes */
873 u32 low = tmp & 0x7ff;
874 u32 high = tmp & ~0xfff; /* bit 11 is reserved */
875 tmp = (high << 4) | (low << 1) | 1;
877 /* best guess what to do with supported wrt requested */
878 if (requested_callbacks) {
879 u32 req = opregion->swsci_sbcb_sub_functions;
880 if ((req & tmp) != req)
881 DRM_DEBUG_DRIVER("SWSCI BIOS requested (%08x) SBCB callbacks that are not supported (%08x)\n", req, tmp);
882 /* XXX: for now, trust the requested callbacks */
883 /* opregion->swsci_sbcb_sub_functions &= tmp; */
885 opregion->swsci_sbcb_sub_functions |= tmp;
889 DRM_DEBUG_DRIVER("SWSCI GBDA callbacks %08x, SBCB callbacks %08x\n",
890 opregion->swsci_gbda_sub_functions,
891 opregion->swsci_sbcb_sub_functions);
893 #else /* CONFIG_ACPI */
894 static inline void swsci_setup(struct drm_device *dev) {}
895 #endif /* CONFIG_ACPI */
897 int intel_opregion_setup(struct drm_device *dev)
899 struct drm_i915_private *dev_priv = dev->dev_private;
900 struct intel_opregion *opregion = &dev_priv->opregion;
902 char buf[sizeof(OPREGION_SIGNATURE)];
906 BUILD_BUG_ON(sizeof(struct opregion_header) != 0x100);
907 BUILD_BUG_ON(sizeof(struct opregion_acpi) != 0x100);
908 BUILD_BUG_ON(sizeof(struct opregion_swsci) != 0x100);
909 BUILD_BUG_ON(sizeof(struct opregion_asle) != 0x100);
911 pci_read_config_dword(dev->pdev, PCI_ASLS, &asls);
912 DRM_DEBUG_DRIVER("graphic opregion physical addr: 0x%x\n", asls);
914 DRM_DEBUG_DRIVER("ACPI OpRegion not supported!\n");
919 INIT_WORK(&opregion->asle_work, asle_work);
922 base = memremap(asls, OPREGION_SIZE, MEMREMAP_WB);
926 memcpy(buf, base, sizeof(buf));
928 if (memcmp(buf, OPREGION_SIGNATURE, 16)) {
929 DRM_DEBUG_DRIVER("opregion signature mismatch\n");
933 opregion->header = base;
934 opregion->vbt = base + OPREGION_VBT_OFFSET;
936 opregion->lid_state = base + ACPI_CLID;
938 mboxes = opregion->header->mboxes;
939 if (mboxes & MBOX_ACPI) {
940 DRM_DEBUG_DRIVER("Public ACPI methods supported\n");
941 opregion->acpi = base + OPREGION_ACPI_OFFSET;
944 if (mboxes & MBOX_SWSCI) {
945 DRM_DEBUG_DRIVER("SWSCI supported\n");
946 opregion->swsci = base + OPREGION_SWSCI_OFFSET;
949 if (mboxes & MBOX_ASLE) {
950 DRM_DEBUG_DRIVER("ASLE supported\n");
951 opregion->asle = base + OPREGION_ASLE_OFFSET;
953 opregion->asle->ardy = ASLE_ARDY_NOT_READY;