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)
56 #define MBOX_ASLE_EXT (1<<4)
58 struct opregion_header {
72 /* OpRegion mailbox #1: public ACPI methods */
73 struct opregion_acpi {
74 u32 drdy; /* driver readiness */
75 u32 csts; /* notification status */
76 u32 cevt; /* current event */
78 u32 didl[8]; /* supported display devices ID list */
79 u32 cpdl[8]; /* currently presented display list */
80 u32 cadl[8]; /* currently active display list */
81 u32 nadl[8]; /* next active devices list */
82 u32 aslp; /* ASL sleep time-out */
83 u32 tidx; /* toggle table index */
84 u32 chpd; /* current hotplug enable indicator */
85 u32 clid; /* current lid state*/
86 u32 cdck; /* current docking state */
87 u32 sxsw; /* Sx state resume */
88 u32 evts; /* ASL supported events */
89 u32 cnot; /* current OS notification */
90 u32 nrdy; /* driver status */
91 u32 did2[7]; /* extended supported display devices ID list */
92 u32 cpd2[7]; /* extended attached display devices list */
96 /* OpRegion mailbox #2: SWSCI */
97 struct opregion_swsci {
98 u32 scic; /* SWSCI command|status|data */
99 u32 parm; /* command parameters */
100 u32 dslp; /* driver sleep time-out */
104 /* OpRegion mailbox #3: ASLE */
105 struct opregion_asle {
106 u32 ardy; /* driver readiness */
107 u32 aslc; /* ASLE interrupt command */
108 u32 tche; /* technology enabled indicator */
109 u32 alsi; /* current ALS illuminance reading */
110 u32 bclp; /* backlight brightness to set */
111 u32 pfit; /* panel fitting state */
112 u32 cblv; /* current brightness level */
113 u16 bclm[20]; /* backlight level duty cycle mapping table */
114 u32 cpfm; /* current panel fitting mode */
115 u32 epfm; /* enabled panel fitting modes */
116 u8 plut[74]; /* panel LUT and identifier */
117 u32 pfmb; /* PWM freq and min brightness */
118 u32 cddv; /* color correction default values */
119 u32 pcft; /* power conservation features */
120 u32 srot; /* supported rotation angles */
121 u32 iuer; /* IUER events */
128 /* Driver readiness indicator */
129 #define ASLE_ARDY_READY (1 << 0)
130 #define ASLE_ARDY_NOT_READY (0 << 0)
132 /* ASLE Interrupt Command (ASLC) bits */
133 #define ASLC_SET_ALS_ILLUM (1 << 0)
134 #define ASLC_SET_BACKLIGHT (1 << 1)
135 #define ASLC_SET_PFIT (1 << 2)
136 #define ASLC_SET_PWM_FREQ (1 << 3)
137 #define ASLC_SUPPORTED_ROTATION_ANGLES (1 << 4)
138 #define ASLC_BUTTON_ARRAY (1 << 5)
139 #define ASLC_CONVERTIBLE_INDICATOR (1 << 6)
140 #define ASLC_DOCKING_INDICATOR (1 << 7)
141 #define ASLC_ISCT_STATE_CHANGE (1 << 8)
142 #define ASLC_REQ_MSK 0x1ff
144 #define ASLC_ALS_ILLUM_FAILED (1 << 10)
145 #define ASLC_BACKLIGHT_FAILED (1 << 12)
146 #define ASLC_PFIT_FAILED (1 << 14)
147 #define ASLC_PWM_FREQ_FAILED (1 << 16)
148 #define ASLC_ROTATION_ANGLES_FAILED (1 << 18)
149 #define ASLC_BUTTON_ARRAY_FAILED (1 << 20)
150 #define ASLC_CONVERTIBLE_FAILED (1 << 22)
151 #define ASLC_DOCKING_FAILED (1 << 24)
152 #define ASLC_ISCT_STATE_FAILED (1 << 26)
154 /* Technology enabled indicator */
155 #define ASLE_TCHE_ALS_EN (1 << 0)
156 #define ASLE_TCHE_BLC_EN (1 << 1)
157 #define ASLE_TCHE_PFIT_EN (1 << 2)
158 #define ASLE_TCHE_PFMB_EN (1 << 3)
160 /* ASLE backlight brightness to set */
161 #define ASLE_BCLP_VALID (1<<31)
162 #define ASLE_BCLP_MSK (~(1<<31))
164 /* ASLE panel fitting request */
165 #define ASLE_PFIT_VALID (1<<31)
166 #define ASLE_PFIT_CENTER (1<<0)
167 #define ASLE_PFIT_STRETCH_TEXT (1<<1)
168 #define ASLE_PFIT_STRETCH_GFX (1<<2)
170 /* PWM frequency and minimum brightness */
171 #define ASLE_PFMB_BRIGHTNESS_MASK (0xff)
172 #define ASLE_PFMB_BRIGHTNESS_VALID (1<<8)
173 #define ASLE_PFMB_PWM_MASK (0x7ffffe00)
174 #define ASLE_PFMB_PWM_VALID (1<<31)
176 #define ASLE_CBLV_VALID (1<<31)
179 #define ASLE_IUER_DOCKING (1 << 7)
180 #define ASLE_IUER_CONVERTIBLE (1 << 6)
181 #define ASLE_IUER_ROTATION_LOCK_BTN (1 << 4)
182 #define ASLE_IUER_VOLUME_DOWN_BTN (1 << 3)
183 #define ASLE_IUER_VOLUME_UP_BTN (1 << 2)
184 #define ASLE_IUER_WINDOWS_BTN (1 << 1)
185 #define ASLE_IUER_POWER_BTN (1 << 0)
187 /* Software System Control Interrupt (SWSCI) */
188 #define SWSCI_SCIC_INDICATOR (1 << 0)
189 #define SWSCI_SCIC_MAIN_FUNCTION_SHIFT 1
190 #define SWSCI_SCIC_MAIN_FUNCTION_MASK (0xf << 1)
191 #define SWSCI_SCIC_SUB_FUNCTION_SHIFT 8
192 #define SWSCI_SCIC_SUB_FUNCTION_MASK (0xff << 8)
193 #define SWSCI_SCIC_EXIT_PARAMETER_SHIFT 8
194 #define SWSCI_SCIC_EXIT_PARAMETER_MASK (0xff << 8)
195 #define SWSCI_SCIC_EXIT_STATUS_SHIFT 5
196 #define SWSCI_SCIC_EXIT_STATUS_MASK (7 << 5)
197 #define SWSCI_SCIC_EXIT_STATUS_SUCCESS 1
199 #define SWSCI_FUNCTION_CODE(main, sub) \
200 ((main) << SWSCI_SCIC_MAIN_FUNCTION_SHIFT | \
201 (sub) << SWSCI_SCIC_SUB_FUNCTION_SHIFT)
203 /* SWSCI: Get BIOS Data (GBDA) */
205 #define SWSCI_GBDA_SUPPORTED_CALLS SWSCI_FUNCTION_CODE(SWSCI_GBDA, 0)
206 #define SWSCI_GBDA_REQUESTED_CALLBACKS SWSCI_FUNCTION_CODE(SWSCI_GBDA, 1)
207 #define SWSCI_GBDA_BOOT_DISPLAY_PREF SWSCI_FUNCTION_CODE(SWSCI_GBDA, 4)
208 #define SWSCI_GBDA_PANEL_DETAILS SWSCI_FUNCTION_CODE(SWSCI_GBDA, 5)
209 #define SWSCI_GBDA_TV_STANDARD SWSCI_FUNCTION_CODE(SWSCI_GBDA, 6)
210 #define SWSCI_GBDA_INTERNAL_GRAPHICS SWSCI_FUNCTION_CODE(SWSCI_GBDA, 7)
211 #define SWSCI_GBDA_SPREAD_SPECTRUM SWSCI_FUNCTION_CODE(SWSCI_GBDA, 10)
213 /* SWSCI: System BIOS Callbacks (SBCB) */
215 #define SWSCI_SBCB_SUPPORTED_CALLBACKS SWSCI_FUNCTION_CODE(SWSCI_SBCB, 0)
216 #define SWSCI_SBCB_INIT_COMPLETION SWSCI_FUNCTION_CODE(SWSCI_SBCB, 1)
217 #define SWSCI_SBCB_PRE_HIRES_SET_MODE SWSCI_FUNCTION_CODE(SWSCI_SBCB, 3)
218 #define SWSCI_SBCB_POST_HIRES_SET_MODE SWSCI_FUNCTION_CODE(SWSCI_SBCB, 4)
219 #define SWSCI_SBCB_DISPLAY_SWITCH SWSCI_FUNCTION_CODE(SWSCI_SBCB, 5)
220 #define SWSCI_SBCB_SET_TV_FORMAT SWSCI_FUNCTION_CODE(SWSCI_SBCB, 6)
221 #define SWSCI_SBCB_ADAPTER_POWER_STATE SWSCI_FUNCTION_CODE(SWSCI_SBCB, 7)
222 #define SWSCI_SBCB_DISPLAY_POWER_STATE SWSCI_FUNCTION_CODE(SWSCI_SBCB, 8)
223 #define SWSCI_SBCB_SET_BOOT_DISPLAY SWSCI_FUNCTION_CODE(SWSCI_SBCB, 9)
224 #define SWSCI_SBCB_SET_PANEL_DETAILS SWSCI_FUNCTION_CODE(SWSCI_SBCB, 10)
225 #define SWSCI_SBCB_SET_INTERNAL_GFX SWSCI_FUNCTION_CODE(SWSCI_SBCB, 11)
226 #define SWSCI_SBCB_POST_HIRES_TO_DOS_FS SWSCI_FUNCTION_CODE(SWSCI_SBCB, 16)
227 #define SWSCI_SBCB_SUSPEND_RESUME SWSCI_FUNCTION_CODE(SWSCI_SBCB, 17)
228 #define SWSCI_SBCB_SET_SPREAD_SPECTRUM SWSCI_FUNCTION_CODE(SWSCI_SBCB, 18)
229 #define SWSCI_SBCB_POST_VBE_PM SWSCI_FUNCTION_CODE(SWSCI_SBCB, 19)
230 #define SWSCI_SBCB_ENABLE_DISABLE_AUDIO SWSCI_FUNCTION_CODE(SWSCI_SBCB, 21)
232 #define ACPI_OTHER_OUTPUT (0<<8)
233 #define ACPI_VGA_OUTPUT (1<<8)
234 #define ACPI_TV_OUTPUT (2<<8)
235 #define ACPI_DIGITAL_OUTPUT (3<<8)
236 #define ACPI_LVDS_OUTPUT (4<<8)
238 #define MAX_DSLP 1500
241 static int swsci(struct drm_device *dev, u32 function, u32 parm, u32 *parm_out)
243 struct drm_i915_private *dev_priv = dev->dev_private;
244 struct opregion_swsci __iomem *swsci = dev_priv->opregion.swsci;
245 u32 main_function, sub_function, scic;
252 main_function = (function & SWSCI_SCIC_MAIN_FUNCTION_MASK) >>
253 SWSCI_SCIC_MAIN_FUNCTION_SHIFT;
254 sub_function = (function & SWSCI_SCIC_SUB_FUNCTION_MASK) >>
255 SWSCI_SCIC_SUB_FUNCTION_SHIFT;
257 /* Check if we can call the function. See swsci_setup for details. */
258 if (main_function == SWSCI_SBCB) {
259 if ((dev_priv->opregion.swsci_sbcb_sub_functions &
260 (1 << sub_function)) == 0)
262 } else if (main_function == SWSCI_GBDA) {
263 if ((dev_priv->opregion.swsci_gbda_sub_functions &
264 (1 << sub_function)) == 0)
268 /* Driver sleep timeout in ms. */
269 dslp = ioread32(&swsci->dslp);
271 /* The spec says 2ms should be the default, but it's too small
272 * for some machines. */
274 } else if (dslp > MAX_DSLP) {
275 /* Hey bios, trust must be earned. */
276 DRM_INFO_ONCE("ACPI BIOS requests an excessive sleep of %u ms, "
277 "using %u ms instead\n", dslp, MAX_DSLP);
281 /* The spec tells us to do this, but we are the only user... */
282 scic = ioread32(&swsci->scic);
283 if (scic & SWSCI_SCIC_INDICATOR) {
284 DRM_DEBUG_DRIVER("SWSCI request already in progress\n");
288 scic = function | SWSCI_SCIC_INDICATOR;
290 iowrite32(parm, &swsci->parm);
291 iowrite32(scic, &swsci->scic);
293 /* Ensure SCI event is selected and event trigger is cleared. */
294 pci_read_config_word(dev->pdev, PCI_SWSCI, &pci_swsci);
295 if (!(pci_swsci & PCI_SWSCI_SCISEL) || (pci_swsci & PCI_SWSCI_GSSCIE)) {
296 pci_swsci |= PCI_SWSCI_SCISEL;
297 pci_swsci &= ~PCI_SWSCI_GSSCIE;
298 pci_write_config_word(dev->pdev, PCI_SWSCI, pci_swsci);
301 /* Use event trigger to tell bios to check the mail. */
302 pci_swsci |= PCI_SWSCI_GSSCIE;
303 pci_write_config_word(dev->pdev, PCI_SWSCI, pci_swsci);
305 /* Poll for the result. */
306 #define C (((scic = ioread32(&swsci->scic)) & SWSCI_SCIC_INDICATOR) == 0)
307 if (wait_for(C, dslp)) {
308 DRM_DEBUG_DRIVER("SWSCI request timed out\n");
312 scic = (scic & SWSCI_SCIC_EXIT_STATUS_MASK) >>
313 SWSCI_SCIC_EXIT_STATUS_SHIFT;
315 /* Note: scic == 0 is an error! */
316 if (scic != SWSCI_SCIC_EXIT_STATUS_SUCCESS) {
317 DRM_DEBUG_DRIVER("SWSCI request error %u\n", scic);
322 *parm_out = ioread32(&swsci->parm);
329 #define DISPLAY_TYPE_CRT 0
330 #define DISPLAY_TYPE_TV 1
331 #define DISPLAY_TYPE_EXTERNAL_FLAT_PANEL 2
332 #define DISPLAY_TYPE_INTERNAL_FLAT_PANEL 3
334 int intel_opregion_notify_encoder(struct intel_encoder *intel_encoder,
337 struct drm_device *dev = intel_encoder->base.dev;
342 /* don't care about old stuff for now */
346 port = intel_ddi_get_encoder_port(intel_encoder);
347 if (port == PORT_E) {
357 switch (intel_encoder->type) {
358 case INTEL_OUTPUT_ANALOG:
359 type = DISPLAY_TYPE_CRT;
361 case INTEL_OUTPUT_UNKNOWN:
362 case INTEL_OUTPUT_DISPLAYPORT:
363 case INTEL_OUTPUT_HDMI:
364 case INTEL_OUTPUT_DP_MST:
365 type = DISPLAY_TYPE_EXTERNAL_FLAT_PANEL;
367 case INTEL_OUTPUT_EDP:
368 type = DISPLAY_TYPE_INTERNAL_FLAT_PANEL;
371 WARN_ONCE(1, "unsupported intel_encoder type %d\n",
372 intel_encoder->type);
376 parm |= type << (16 + port * 3);
378 return swsci(dev, SWSCI_SBCB_DISPLAY_POWER_STATE, parm, NULL);
381 static const struct {
382 pci_power_t pci_power_state;
384 } power_state_map[] = {
389 { PCI_D3cold, 0x04 },
392 int intel_opregion_notify_adapter(struct drm_device *dev, pci_power_t state)
399 for (i = 0; i < ARRAY_SIZE(power_state_map); i++) {
400 if (state == power_state_map[i].pci_power_state)
401 return swsci(dev, SWSCI_SBCB_ADAPTER_POWER_STATE,
402 power_state_map[i].parm, NULL);
409 * If the vendor backlight interface is not in use and ACPI backlight interface
410 * is broken, do not bother processing backlight change requests from firmware.
412 static bool should_ignore_backlight_request(void)
414 return acpi_video_backlight_support() &&
415 !acpi_video_verify_backlight_support();
418 static u32 asle_set_backlight(struct drm_device *dev, u32 bclp)
420 struct drm_i915_private *dev_priv = dev->dev_private;
421 struct intel_connector *intel_connector;
422 struct opregion_asle __iomem *asle = dev_priv->opregion.asle;
424 DRM_DEBUG_DRIVER("bclp = 0x%08x\n", bclp);
426 if (should_ignore_backlight_request()) {
427 DRM_DEBUG_KMS("opregion backlight request ignored\n");
431 if (!(bclp & ASLE_BCLP_VALID))
432 return ASLC_BACKLIGHT_FAILED;
434 bclp &= ASLE_BCLP_MSK;
436 return ASLC_BACKLIGHT_FAILED;
438 drm_modeset_lock(&dev->mode_config.connection_mutex, NULL);
441 * Update backlight on all connectors that support backlight (usually
444 DRM_DEBUG_KMS("updating opregion backlight %d/255\n", bclp);
445 list_for_each_entry(intel_connector, &dev->mode_config.connector_list, base.head)
446 intel_panel_set_backlight_acpi(intel_connector, bclp, 255);
447 iowrite32(DIV_ROUND_UP(bclp * 100, 255) | ASLE_CBLV_VALID, &asle->cblv);
449 drm_modeset_unlock(&dev->mode_config.connection_mutex);
455 static u32 asle_set_als_illum(struct drm_device *dev, u32 alsi)
457 /* alsi is the current ALS reading in lux. 0 indicates below sensor
458 range, 0xffff indicates above sensor range. 1-0xfffe are valid */
459 DRM_DEBUG_DRIVER("Illum is not supported\n");
460 return ASLC_ALS_ILLUM_FAILED;
463 static u32 asle_set_pwm_freq(struct drm_device *dev, u32 pfmb)
465 DRM_DEBUG_DRIVER("PWM freq is not supported\n");
466 return ASLC_PWM_FREQ_FAILED;
469 static u32 asle_set_pfit(struct drm_device *dev, u32 pfit)
471 /* Panel fitting is currently controlled by the X code, so this is a
472 noop until modesetting support works fully */
473 DRM_DEBUG_DRIVER("Pfit is not supported\n");
474 return ASLC_PFIT_FAILED;
477 static u32 asle_set_supported_rotation_angles(struct drm_device *dev, u32 srot)
479 DRM_DEBUG_DRIVER("SROT is not supported\n");
480 return ASLC_ROTATION_ANGLES_FAILED;
483 static u32 asle_set_button_array(struct drm_device *dev, u32 iuer)
486 DRM_DEBUG_DRIVER("Button array event is not supported (nothing)\n");
487 if (iuer & ASLE_IUER_ROTATION_LOCK_BTN)
488 DRM_DEBUG_DRIVER("Button array event is not supported (rotation lock)\n");
489 if (iuer & ASLE_IUER_VOLUME_DOWN_BTN)
490 DRM_DEBUG_DRIVER("Button array event is not supported (volume down)\n");
491 if (iuer & ASLE_IUER_VOLUME_UP_BTN)
492 DRM_DEBUG_DRIVER("Button array event is not supported (volume up)\n");
493 if (iuer & ASLE_IUER_WINDOWS_BTN)
494 DRM_DEBUG_DRIVER("Button array event is not supported (windows)\n");
495 if (iuer & ASLE_IUER_POWER_BTN)
496 DRM_DEBUG_DRIVER("Button array event is not supported (power)\n");
498 return ASLC_BUTTON_ARRAY_FAILED;
501 static u32 asle_set_convertible(struct drm_device *dev, u32 iuer)
503 if (iuer & ASLE_IUER_CONVERTIBLE)
504 DRM_DEBUG_DRIVER("Convertible is not supported (clamshell)\n");
506 DRM_DEBUG_DRIVER("Convertible is not supported (slate)\n");
508 return ASLC_CONVERTIBLE_FAILED;
511 static u32 asle_set_docking(struct drm_device *dev, u32 iuer)
513 if (iuer & ASLE_IUER_DOCKING)
514 DRM_DEBUG_DRIVER("Docking is not supported (docked)\n");
516 DRM_DEBUG_DRIVER("Docking is not supported (undocked)\n");
518 return ASLC_DOCKING_FAILED;
521 static u32 asle_isct_state(struct drm_device *dev)
523 DRM_DEBUG_DRIVER("ISCT is not supported\n");
524 return ASLC_ISCT_STATE_FAILED;
527 static void asle_work(struct work_struct *work)
529 struct intel_opregion *opregion =
530 container_of(work, struct intel_opregion, asle_work);
531 struct drm_i915_private *dev_priv =
532 container_of(opregion, struct drm_i915_private, opregion);
533 struct drm_device *dev = dev_priv->dev;
534 struct opregion_asle __iomem *asle = dev_priv->opregion.asle;
541 aslc_req = ioread32(&asle->aslc);
543 if (!(aslc_req & ASLC_REQ_MSK)) {
544 DRM_DEBUG_DRIVER("No request on ASLC interrupt 0x%08x\n",
549 if (aslc_req & ASLC_SET_ALS_ILLUM)
550 aslc_stat |= asle_set_als_illum(dev, ioread32(&asle->alsi));
552 if (aslc_req & ASLC_SET_BACKLIGHT)
553 aslc_stat |= asle_set_backlight(dev, ioread32(&asle->bclp));
555 if (aslc_req & ASLC_SET_PFIT)
556 aslc_stat |= asle_set_pfit(dev, ioread32(&asle->pfit));
558 if (aslc_req & ASLC_SET_PWM_FREQ)
559 aslc_stat |= asle_set_pwm_freq(dev, ioread32(&asle->pfmb));
561 if (aslc_req & ASLC_SUPPORTED_ROTATION_ANGLES)
562 aslc_stat |= asle_set_supported_rotation_angles(dev,
563 ioread32(&asle->srot));
565 if (aslc_req & ASLC_BUTTON_ARRAY)
566 aslc_stat |= asle_set_button_array(dev, ioread32(&asle->iuer));
568 if (aslc_req & ASLC_CONVERTIBLE_INDICATOR)
569 aslc_stat |= asle_set_convertible(dev, ioread32(&asle->iuer));
571 if (aslc_req & ASLC_DOCKING_INDICATOR)
572 aslc_stat |= asle_set_docking(dev, ioread32(&asle->iuer));
574 if (aslc_req & ASLC_ISCT_STATE_CHANGE)
575 aslc_stat |= asle_isct_state(dev);
577 iowrite32(aslc_stat, &asle->aslc);
580 void intel_opregion_asle_intr(struct drm_device *dev)
582 struct drm_i915_private *dev_priv = dev->dev_private;
584 if (dev_priv->opregion.asle)
585 schedule_work(&dev_priv->opregion.asle_work);
588 #define ACPI_EV_DISPLAY_SWITCH (1<<0)
589 #define ACPI_EV_LID (1<<1)
590 #define ACPI_EV_DOCK (1<<2)
592 static struct intel_opregion *system_opregion;
594 static int intel_opregion_video_event(struct notifier_block *nb,
595 unsigned long val, void *data)
597 /* The only video events relevant to opregion are 0x80. These indicate
598 either a docking event, lid switch or display switch request. In
599 Linux, these are handled by the dock, button and video drivers.
602 struct opregion_acpi __iomem *acpi;
603 struct acpi_bus_event *event = data;
606 if (strcmp(event->device_class, ACPI_VIDEO_CLASS) != 0)
609 if (!system_opregion)
612 acpi = system_opregion->acpi;
614 if (event->type == 0x80 &&
615 (ioread32(&acpi->cevt) & 1) == 0)
618 iowrite32(0, &acpi->csts);
623 static struct notifier_block intel_opregion_notifier = {
624 .notifier_call = intel_opregion_video_event,
628 * Initialise the DIDL field in opregion. This passes a list of devices to
629 * the firmware. Values are defined by section B.4.2 of the ACPI specification
633 static void intel_didl_outputs(struct drm_device *dev)
635 struct drm_i915_private *dev_priv = dev->dev_private;
636 struct intel_opregion *opregion = &dev_priv->opregion;
637 struct drm_connector *connector;
639 struct acpi_device *acpi_dev, *acpi_cdev, *acpi_video_bus = NULL;
640 unsigned long long device_id;
645 handle = ACPI_HANDLE(&dev->pdev->dev);
646 if (!handle || acpi_bus_get_device(handle, &acpi_dev))
649 if (acpi_is_video_device(handle))
650 acpi_video_bus = acpi_dev;
652 list_for_each_entry(acpi_cdev, &acpi_dev->children, node) {
653 if (acpi_is_video_device(acpi_cdev->handle)) {
654 acpi_video_bus = acpi_cdev;
660 if (!acpi_video_bus) {
661 pr_warn("No ACPI video bus found\n");
665 list_for_each_entry(acpi_cdev, &acpi_video_bus->children, node) {
667 dev_dbg(&dev->pdev->dev,
668 "More than 8 outputs detected via ACPI\n");
672 acpi_evaluate_integer(acpi_cdev->handle, "_ADR",
674 if (ACPI_SUCCESS(status)) {
677 iowrite32((u32)(device_id & 0x0f0f),
678 &opregion->acpi->didl[i]);
684 /* If fewer than 8 outputs, the list must be null terminated */
686 iowrite32(0, &opregion->acpi->didl[i]);
691 list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
692 int output_type = ACPI_OTHER_OUTPUT;
694 dev_dbg(&dev->pdev->dev,
695 "More than 8 outputs in connector list\n");
698 switch (connector->connector_type) {
699 case DRM_MODE_CONNECTOR_VGA:
700 case DRM_MODE_CONNECTOR_DVIA:
701 output_type = ACPI_VGA_OUTPUT;
703 case DRM_MODE_CONNECTOR_Composite:
704 case DRM_MODE_CONNECTOR_SVIDEO:
705 case DRM_MODE_CONNECTOR_Component:
706 case DRM_MODE_CONNECTOR_9PinDIN:
707 output_type = ACPI_TV_OUTPUT;
709 case DRM_MODE_CONNECTOR_DVII:
710 case DRM_MODE_CONNECTOR_DVID:
711 case DRM_MODE_CONNECTOR_DisplayPort:
712 case DRM_MODE_CONNECTOR_HDMIA:
713 case DRM_MODE_CONNECTOR_HDMIB:
714 output_type = ACPI_DIGITAL_OUTPUT;
716 case DRM_MODE_CONNECTOR_LVDS:
717 output_type = ACPI_LVDS_OUTPUT;
720 temp = ioread32(&opregion->acpi->didl[i]);
721 iowrite32(temp | (1<<31) | output_type | i,
722 &opregion->acpi->didl[i]);
728 static void intel_setup_cadls(struct drm_device *dev)
730 struct drm_i915_private *dev_priv = dev->dev_private;
731 struct intel_opregion *opregion = &dev_priv->opregion;
735 /* Initialize the CADL field by duplicating the DIDL values.
736 * Technically, this is not always correct as display outputs may exist,
737 * but not active. This initialization is necessary for some Clevo
738 * laptops that check this field before processing the brightness and
739 * display switching hotkeys. Just like DIDL, CADL is NULL-terminated if
740 * there are less than eight devices. */
742 disp_id = ioread32(&opregion->acpi->didl[i]);
743 iowrite32(disp_id, &opregion->acpi->cadl[i]);
744 } while (++i < 8 && disp_id != 0);
747 void intel_opregion_init(struct drm_device *dev)
749 struct drm_i915_private *dev_priv = dev->dev_private;
750 struct intel_opregion *opregion = &dev_priv->opregion;
752 if (!opregion->header)
755 if (opregion->acpi) {
756 intel_didl_outputs(dev);
757 intel_setup_cadls(dev);
759 /* Notify BIOS we are ready to handle ACPI video ext notifs.
760 * Right now, all the events are handled by the ACPI video module.
761 * We don't actually need to do anything with them. */
762 iowrite32(0, &opregion->acpi->csts);
763 iowrite32(1, &opregion->acpi->drdy);
765 system_opregion = opregion;
766 register_acpi_notifier(&intel_opregion_notifier);
769 if (opregion->asle) {
770 iowrite32(ASLE_TCHE_BLC_EN, &opregion->asle->tche);
771 iowrite32(ASLE_ARDY_READY, &opregion->asle->ardy);
775 void intel_opregion_fini(struct drm_device *dev)
777 struct drm_i915_private *dev_priv = dev->dev_private;
778 struct intel_opregion *opregion = &dev_priv->opregion;
780 if (!opregion->header)
784 iowrite32(ASLE_ARDY_NOT_READY, &opregion->asle->ardy);
786 cancel_work_sync(&dev_priv->opregion.asle_work);
788 if (opregion->acpi) {
789 iowrite32(0, &opregion->acpi->drdy);
791 system_opregion = NULL;
792 unregister_acpi_notifier(&intel_opregion_notifier);
795 /* just clear all opregion memory pointers now */
796 iounmap(opregion->header);
797 opregion->header = NULL;
798 opregion->acpi = NULL;
799 opregion->swsci = NULL;
800 opregion->asle = NULL;
801 opregion->vbt = NULL;
802 opregion->lid_state = NULL;
805 static void swsci_setup(struct drm_device *dev)
807 struct drm_i915_private *dev_priv = dev->dev_private;
808 struct intel_opregion *opregion = &dev_priv->opregion;
809 bool requested_callbacks = false;
812 /* Sub-function code 0 is okay, let's allow them. */
813 opregion->swsci_gbda_sub_functions = 1;
814 opregion->swsci_sbcb_sub_functions = 1;
816 /* We use GBDA to ask for supported GBDA calls. */
817 if (swsci(dev, SWSCI_GBDA_SUPPORTED_CALLS, 0, &tmp) == 0) {
818 /* make the bits match the sub-function codes */
820 opregion->swsci_gbda_sub_functions |= tmp;
824 * We also use GBDA to ask for _requested_ SBCB callbacks. The driver
825 * must not call interfaces that are not specifically requested by the
828 if (swsci(dev, SWSCI_GBDA_REQUESTED_CALLBACKS, 0, &tmp) == 0) {
829 /* here, the bits already match sub-function codes */
830 opregion->swsci_sbcb_sub_functions |= tmp;
831 requested_callbacks = true;
835 * But we use SBCB to ask for _supported_ SBCB calls. This does not mean
836 * the callback is _requested_. But we still can't call interfaces that
839 if (swsci(dev, SWSCI_SBCB_SUPPORTED_CALLBACKS, 0, &tmp) == 0) {
840 /* make the bits match the sub-function codes */
841 u32 low = tmp & 0x7ff;
842 u32 high = tmp & ~0xfff; /* bit 11 is reserved */
843 tmp = (high << 4) | (low << 1) | 1;
845 /* best guess what to do with supported wrt requested */
846 if (requested_callbacks) {
847 u32 req = opregion->swsci_sbcb_sub_functions;
848 if ((req & tmp) != req)
849 DRM_DEBUG_DRIVER("SWSCI BIOS requested (%08x) SBCB callbacks that are not supported (%08x)\n", req, tmp);
850 /* XXX: for now, trust the requested callbacks */
851 /* opregion->swsci_sbcb_sub_functions &= tmp; */
853 opregion->swsci_sbcb_sub_functions |= tmp;
857 DRM_DEBUG_DRIVER("SWSCI GBDA callbacks %08x, SBCB callbacks %08x\n",
858 opregion->swsci_gbda_sub_functions,
859 opregion->swsci_sbcb_sub_functions);
861 #else /* CONFIG_ACPI */
862 static inline void swsci_setup(struct drm_device *dev) {}
863 #endif /* CONFIG_ACPI */
865 int intel_opregion_setup(struct drm_device *dev)
867 struct drm_i915_private *dev_priv = dev->dev_private;
868 struct intel_opregion *opregion = &dev_priv->opregion;
871 char buf[sizeof(OPREGION_SIGNATURE)];
874 BUILD_BUG_ON(sizeof(struct opregion_header) != 0x100);
875 BUILD_BUG_ON(sizeof(struct opregion_acpi) != 0x100);
876 BUILD_BUG_ON(sizeof(struct opregion_swsci) != 0x100);
877 BUILD_BUG_ON(sizeof(struct opregion_asle) != 0x100);
879 pci_read_config_dword(dev->pdev, PCI_ASLS, &asls);
880 DRM_DEBUG_DRIVER("graphic opregion physical addr: 0x%x\n", asls);
882 DRM_DEBUG_DRIVER("ACPI OpRegion not supported!\n");
887 INIT_WORK(&opregion->asle_work, asle_work);
890 base = acpi_os_ioremap(asls, OPREGION_SIZE);
894 memcpy_fromio(buf, base, sizeof(buf));
896 if (memcmp(buf, OPREGION_SIGNATURE, 16)) {
897 DRM_DEBUG_DRIVER("opregion signature mismatch\n");
901 opregion->header = base;
902 opregion->vbt = base + OPREGION_VBT_OFFSET;
904 opregion->lid_state = base + ACPI_CLID;
906 mboxes = ioread32(&opregion->header->mboxes);
907 if (mboxes & MBOX_ACPI) {
908 DRM_DEBUG_DRIVER("Public ACPI methods supported\n");
909 opregion->acpi = base + OPREGION_ACPI_OFFSET;
912 if (mboxes & MBOX_SWSCI) {
913 DRM_DEBUG_DRIVER("SWSCI supported\n");
914 opregion->swsci = base + OPREGION_SWSCI_OFFSET;
917 if (mboxes & MBOX_ASLE) {
918 DRM_DEBUG_DRIVER("ASLE supported\n");
919 opregion->asle = base + OPREGION_ASLE_OFFSET;
921 iowrite32(ASLE_ARDY_NOT_READY, &opregion->asle->ardy);