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>
40 #define OPREGION_HEADER_OFFSET 0
41 #define OPREGION_ACPI_OFFSET 0x100
42 #define ACPI_CLID 0x01ac /* current lid state indicator */
43 #define ACPI_CDCK 0x01b0 /* current docking state indicator */
44 #define OPREGION_SWSCI_OFFSET 0x200
45 #define OPREGION_ASLE_OFFSET 0x300
46 #define OPREGION_VBT_OFFSET 0x400
48 #define OPREGION_SIGNATURE "IntelGraphicsMem"
49 #define MBOX_ACPI (1<<0)
50 #define MBOX_SWSCI (1<<1)
51 #define MBOX_ASLE (1<<2)
53 struct opregion_header {
62 } __attribute__((packed));
64 /* OpRegion mailbox #1: public ACPI methods */
65 struct opregion_acpi {
66 u32 drdy; /* driver readiness */
67 u32 csts; /* notification status */
68 u32 cevt; /* current event */
70 u32 didl[8]; /* supported display devices ID list */
71 u32 cpdl[8]; /* currently presented display list */
72 u32 cadl[8]; /* currently active display list */
73 u32 nadl[8]; /* next active devices list */
74 u32 aslp; /* ASL sleep time-out */
75 u32 tidx; /* toggle table index */
76 u32 chpd; /* current hotplug enable indicator */
77 u32 clid; /* current lid state*/
78 u32 cdck; /* current docking state */
79 u32 sxsw; /* Sx state resume */
80 u32 evts; /* ASL supported events */
81 u32 cnot; /* current OS notification */
82 u32 nrdy; /* driver status */
84 } __attribute__((packed));
86 /* OpRegion mailbox #2: SWSCI */
87 struct opregion_swsci {
88 u32 scic; /* SWSCI command|status|data */
89 u32 parm; /* command parameters */
90 u32 dslp; /* driver sleep time-out */
92 } __attribute__((packed));
94 /* OpRegion mailbox #3: ASLE */
95 struct opregion_asle {
96 u32 ardy; /* driver readiness */
97 u32 aslc; /* ASLE interrupt command */
98 u32 tche; /* technology enabled indicator */
99 u32 alsi; /* current ALS illuminance reading */
100 u32 bclp; /* backlight brightness to set */
101 u32 pfit; /* panel fitting state */
102 u32 cblv; /* current brightness level */
103 u16 bclm[20]; /* backlight level duty cycle mapping table */
104 u32 cpfm; /* current panel fitting mode */
105 u32 epfm; /* enabled panel fitting modes */
106 u8 plut[74]; /* panel LUT and identifier */
107 u32 pfmb; /* PWM freq and min brightness */
109 } __attribute__((packed));
111 /* Driver readiness indicator */
112 #define ASLE_ARDY_READY (1 << 0)
113 #define ASLE_ARDY_NOT_READY (0 << 0)
115 /* ASLE irq request bits */
116 #define ASLE_SET_ALS_ILLUM (1 << 0)
117 #define ASLE_SET_BACKLIGHT (1 << 1)
118 #define ASLE_SET_PFIT (1 << 2)
119 #define ASLE_SET_PWM_FREQ (1 << 3)
120 #define ASLE_REQ_MSK 0xf
122 /* response bits of ASLE irq request */
123 #define ASLE_ALS_ILLUM_FAILED (1<<10)
124 #define ASLE_BACKLIGHT_FAILED (1<<12)
125 #define ASLE_PFIT_FAILED (1<<14)
126 #define ASLE_PWM_FREQ_FAILED (1<<16)
128 /* Technology enabled indicator */
129 #define ASLE_TCHE_ALS_EN (1 << 0)
130 #define ASLE_TCHE_BLC_EN (1 << 1)
131 #define ASLE_TCHE_PFIT_EN (1 << 2)
132 #define ASLE_TCHE_PFMB_EN (1 << 3)
134 /* ASLE backlight brightness to set */
135 #define ASLE_BCLP_VALID (1<<31)
136 #define ASLE_BCLP_MSK (~(1<<31))
138 /* ASLE panel fitting request */
139 #define ASLE_PFIT_VALID (1<<31)
140 #define ASLE_PFIT_CENTER (1<<0)
141 #define ASLE_PFIT_STRETCH_TEXT (1<<1)
142 #define ASLE_PFIT_STRETCH_GFX (1<<2)
144 /* PWM frequency and minimum brightness */
145 #define ASLE_PFMB_BRIGHTNESS_MASK (0xff)
146 #define ASLE_PFMB_BRIGHTNESS_VALID (1<<8)
147 #define ASLE_PFMB_PWM_MASK (0x7ffffe00)
148 #define ASLE_PFMB_PWM_VALID (1<<31)
150 #define ASLE_CBLV_VALID (1<<31)
152 #define ACPI_OTHER_OUTPUT (0<<8)
153 #define ACPI_VGA_OUTPUT (1<<8)
154 #define ACPI_TV_OUTPUT (2<<8)
155 #define ACPI_DIGITAL_OUTPUT (3<<8)
156 #define ACPI_LVDS_OUTPUT (4<<8)
158 static u32 asle_set_backlight(struct drm_device *dev, u32 bclp)
160 struct drm_i915_private *dev_priv = dev->dev_private;
161 struct opregion_asle __iomem *asle = dev_priv->opregion.asle;
163 DRM_DEBUG_DRIVER("bclp = 0x%08x\n", bclp);
165 if (!(bclp & ASLE_BCLP_VALID))
166 return ASLE_BACKLIGHT_FAILED;
168 bclp &= ASLE_BCLP_MSK;
170 return ASLE_BACKLIGHT_FAILED;
172 intel_panel_set_backlight(dev, bclp, 255);
173 iowrite32((bclp*0x64)/0xff | ASLE_CBLV_VALID, &asle->cblv);
178 static u32 asle_set_als_illum(struct drm_device *dev, u32 alsi)
180 /* alsi is the current ALS reading in lux. 0 indicates below sensor
181 range, 0xffff indicates above sensor range. 1-0xfffe are valid */
182 DRM_DEBUG_DRIVER("Illum is not supported\n");
183 return ASLE_ALS_ILLUM_FAILED;
186 static u32 asle_set_pwm_freq(struct drm_device *dev, u32 pfmb)
188 DRM_DEBUG_DRIVER("PWM freq is not supported\n");
189 return ASLE_PWM_FREQ_FAILED;
192 static u32 asle_set_pfit(struct drm_device *dev, u32 pfit)
194 /* Panel fitting is currently controlled by the X code, so this is a
195 noop until modesetting support works fully */
196 DRM_DEBUG_DRIVER("Pfit is not supported\n");
197 return ASLE_PFIT_FAILED;
200 void intel_opregion_asle_intr(struct drm_device *dev)
202 struct drm_i915_private *dev_priv = dev->dev_private;
203 struct opregion_asle __iomem *asle = dev_priv->opregion.asle;
210 asle_req = ioread32(&asle->aslc) & ASLE_REQ_MSK;
213 DRM_DEBUG_DRIVER("non asle set request??\n");
217 if (asle_req & ASLE_SET_ALS_ILLUM)
218 asle_stat |= asle_set_als_illum(dev, ioread32(&asle->alsi));
220 if (asle_req & ASLE_SET_BACKLIGHT)
221 asle_stat |= asle_set_backlight(dev, ioread32(&asle->bclp));
223 if (asle_req & ASLE_SET_PFIT)
224 asle_stat |= asle_set_pfit(dev, ioread32(&asle->pfit));
226 if (asle_req & ASLE_SET_PWM_FREQ)
227 asle_stat |= asle_set_pwm_freq(dev, ioread32(&asle->pfmb));
229 iowrite32(asle_stat, &asle->aslc);
232 #define ACPI_EV_DISPLAY_SWITCH (1<<0)
233 #define ACPI_EV_LID (1<<1)
234 #define ACPI_EV_DOCK (1<<2)
236 static struct intel_opregion *system_opregion;
239 static int intel_opregion_video_event(struct notifier_block *nb,
240 unsigned long val, void *data)
242 /* The only video events relevant to opregion are 0x80. These indicate
243 either a docking event, lid switch or display switch request. In
244 Linux, these are handled by the dock, button and video drivers.
247 struct opregion_acpi __iomem *acpi;
248 struct acpi_bus_event *event = data;
251 if (strcmp(event->device_class, ACPI_VIDEO_CLASS) != 0)
254 if (!system_opregion)
257 acpi = system_opregion->acpi;
259 if (event->type == 0x80 &&
260 (ioread32(&acpi->cevt) & 1) == 0)
263 iowrite32(0, &acpi->csts);
268 static struct notifier_block intel_opregion_notifier = {
269 .notifier_call = intel_opregion_video_event,
273 static int acpi_is_video_device(ACPI_HANDLE devh) {
275 if (ACPI_FAILURE(AcpiGetHandle(devh, "_DOD", &h)) ||
276 ACPI_FAILURE(AcpiGetHandle(devh, "_DOS", &h))) {
283 * Initialise the DIDL field in opregion. This passes a list of devices to
284 * the firmware. Values are defined by section B.4.2 of the ACPI specification
288 static void intel_didl_outputs(struct drm_device *dev)
290 struct drm_i915_private *dev_priv = dev->dev_private;
291 struct intel_opregion *opregion = &dev_priv->opregion;
292 struct drm_connector *connector;
293 ACPI_HANDLE handle, acpi_cdev, acpi_video_bus;
299 handle = acpi_get_handle(dev->dev);
303 if (acpi_is_video_device(handle))
304 acpi_video_bus = handle;
307 acpi_video_bus = NULL;
308 while (AcpiGetNextObject(ACPI_TYPE_DEVICE, handle, acpi_cdev,
309 &acpi_cdev) != AE_NOT_FOUND) {
310 if (acpi_is_video_device(acpi_cdev)) {
311 acpi_video_bus = acpi_cdev;
317 if (!acpi_video_bus) {
318 pr_warn("No ACPI video bus found\n");
323 while (AcpiGetNextObject(ACPI_TYPE_DEVICE, acpi_video_bus, acpi_cdev,
324 &acpi_cdev) != AE_NOT_FOUND) {
326 device_printf(dev->dev,
327 "More than 8 outputs detected via ACPI\n");
330 status = acpi_GetInteger(acpi_cdev, "_ADR", &device_id);
331 if (ACPI_SUCCESS(status)) {
334 iowrite32((u32)(device_id & 0x0f0f),
335 &opregion->acpi->didl[i]);
341 /* If fewer than 8 outputs, the list must be null terminated */
343 iowrite32(0, &opregion->acpi->didl[i]);
348 list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
349 int output_type = ACPI_OTHER_OUTPUT;
351 device_printf(dev->dev,
352 "More than 8 outputs in connector list\n");
355 switch (connector->connector_type) {
356 case DRM_MODE_CONNECTOR_VGA:
357 case DRM_MODE_CONNECTOR_DVIA:
358 output_type = ACPI_VGA_OUTPUT;
360 case DRM_MODE_CONNECTOR_Composite:
361 case DRM_MODE_CONNECTOR_SVIDEO:
362 case DRM_MODE_CONNECTOR_Component:
363 case DRM_MODE_CONNECTOR_9PinDIN:
364 output_type = ACPI_TV_OUTPUT;
366 case DRM_MODE_CONNECTOR_DVII:
367 case DRM_MODE_CONNECTOR_DVID:
368 case DRM_MODE_CONNECTOR_DisplayPort:
369 case DRM_MODE_CONNECTOR_HDMIA:
370 case DRM_MODE_CONNECTOR_HDMIB:
371 output_type = ACPI_DIGITAL_OUTPUT;
373 case DRM_MODE_CONNECTOR_LVDS:
374 output_type = ACPI_LVDS_OUTPUT;
377 temp = ioread32(&opregion->acpi->didl[i]);
378 iowrite32(temp | (1<<31) | output_type | i,
379 &opregion->acpi->didl[i]);
385 static void intel_setup_cadls(struct drm_device *dev)
387 struct drm_i915_private *dev_priv = dev->dev_private;
388 struct intel_opregion *opregion = &dev_priv->opregion;
392 /* Initialize the CADL field by duplicating the DIDL values.
393 * Technically, this is not always correct as display outputs may exist,
394 * but not active. This initialization is necessary for some Clevo
395 * laptops that check this field before processing the brightness and
396 * display switching hotkeys. Just like DIDL, CADL is NULL-terminated if
397 * there are less than eight devices. */
399 disp_id = ioread32(&opregion->acpi->didl[i]);
400 iowrite32(disp_id, &opregion->acpi->cadl[i]);
401 } while (++i < 8 && disp_id != 0);
404 void intel_opregion_init(struct drm_device *dev)
406 struct drm_i915_private *dev_priv = dev->dev_private;
407 struct intel_opregion *opregion = &dev_priv->opregion;
409 if (!opregion->header)
412 if (opregion->acpi) {
413 if (drm_core_check_feature(dev, DRIVER_MODESET)) {
414 intel_didl_outputs(dev);
415 intel_setup_cadls(dev);
418 /* Notify BIOS we are ready to handle ACPI video ext notifs.
419 * Right now, all the events are handled by the ACPI video module.
420 * We don't actually need to do anything with them. */
421 iowrite32(0, &opregion->acpi->csts);
422 iowrite32(1, &opregion->acpi->drdy);
424 system_opregion = opregion;
427 if (opregion->asle) {
428 iowrite32(ASLE_TCHE_BLC_EN, &opregion->asle->tche);
429 iowrite32(ASLE_ARDY_READY, &opregion->asle->ardy);
433 void intel_opregion_fini(struct drm_device *dev)
435 struct drm_i915_private *dev_priv = dev->dev_private;
436 struct intel_opregion *opregion = &dev_priv->opregion;
438 if (!opregion->header)
442 iowrite32(ASLE_ARDY_NOT_READY, &opregion->asle->ardy);
444 if (opregion->acpi) {
445 iowrite32(0, &opregion->acpi->drdy);
447 system_opregion = NULL;
450 /* just clear all opregion memory pointers now */
451 pmap_unmapdev((vm_offset_t)opregion->header, OPREGION_SIZE);
452 opregion->header = NULL;
453 opregion->acpi = NULL;
454 opregion->swsci = NULL;
455 opregion->asle = NULL;
456 opregion->vbt = NULL;
459 int intel_opregion_setup(struct drm_device *dev)
461 struct drm_i915_private *dev_priv = dev->dev_private;
462 struct intel_opregion *opregion = &dev_priv->opregion;
465 char buf[sizeof(OPREGION_SIGNATURE)];
468 pci_read_config_dword(dev->pdev, PCI_ASLS, &asls);
469 DRM_DEBUG_DRIVER("graphic opregion physical addr: 0x%x\n", asls);
471 DRM_DEBUG_DRIVER("ACPI OpRegion not supported!\n");
475 base = (void *)pmap_mapbios(asls, OPREGION_SIZE);
479 memcpy_fromio(buf, base, sizeof(buf));
481 if (memcmp(buf, OPREGION_SIGNATURE, 16)) {
482 DRM_DEBUG_DRIVER("opregion signature mismatch\n");
486 opregion->header = (struct opregion_header *)base;
487 opregion->vbt = base + OPREGION_VBT_OFFSET;
489 opregion->lid_state = (u32 *)(base + ACPI_CLID);
491 mboxes = ioread32(&opregion->header->mboxes);
492 if (mboxes & MBOX_ACPI) {
493 DRM_DEBUG_DRIVER("Public ACPI methods supported\n");
494 opregion->acpi = (struct opregion_acpi *)(base + OPREGION_ACPI_OFFSET);
497 if (mboxes & MBOX_SWSCI) {
498 DRM_DEBUG_DRIVER("SWSCI supported\n");
499 opregion->swsci = (struct opregion_swsci *)(base + OPREGION_SWSCI_OFFSET);
501 if (mboxes & MBOX_ASLE) {
502 DRM_DEBUG_DRIVER("ASLE supported\n");
503 opregion->asle = (struct opregion_asle *)(base + OPREGION_ASLE_OFFSET);
505 iowrite32(ASLE_ARDY_NOT_READY, &opregion->asle->ardy);
511 pmap_unmapdev((vm_offset_t)base, OPREGION_SIZE);