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 <linux/acpi_io.h>
32 #include <acpi/video.h>
35 #include <drm/i915_drm.h>
37 #include "intel_drv.h"
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)
55 struct opregion_header {
64 } __attribute__((packed));
66 /* OpRegion mailbox #1: public ACPI methods */
67 struct opregion_acpi {
68 u32 drdy; /* driver readiness */
69 u32 csts; /* notification status */
70 u32 cevt; /* current event */
72 u32 didl[8]; /* supported display devices ID list */
73 u32 cpdl[8]; /* currently presented display list */
74 u32 cadl[8]; /* currently active display list */
75 u32 nadl[8]; /* next active devices list */
76 u32 aslp; /* ASL sleep time-out */
77 u32 tidx; /* toggle table index */
78 u32 chpd; /* current hotplug enable indicator */
79 u32 clid; /* current lid state*/
80 u32 cdck; /* current docking state */
81 u32 sxsw; /* Sx state resume */
82 u32 evts; /* ASL supported events */
83 u32 cnot; /* current OS notification */
84 u32 nrdy; /* driver status */
86 } __attribute__((packed));
88 /* OpRegion mailbox #2: SWSCI */
89 struct opregion_swsci {
90 u32 scic; /* SWSCI command|status|data */
91 u32 parm; /* command parameters */
92 u32 dslp; /* driver sleep time-out */
94 } __attribute__((packed));
96 /* OpRegion mailbox #3: ASLE */
97 struct opregion_asle {
98 u32 ardy; /* driver readiness */
99 u32 aslc; /* ASLE interrupt command */
100 u32 tche; /* technology enabled indicator */
101 u32 alsi; /* current ALS illuminance reading */
102 u32 bclp; /* backlight brightness to set */
103 u32 pfit; /* panel fitting state */
104 u32 cblv; /* current brightness level */
105 u16 bclm[20]; /* backlight level duty cycle mapping table */
106 u32 cpfm; /* current panel fitting mode */
107 u32 epfm; /* enabled panel fitting modes */
108 u8 plut[74]; /* panel LUT and identifier */
109 u32 pfmb; /* PWM freq and min brightness */
111 } __attribute__((packed));
113 /* ASLE irq request bits */
114 #define ASLE_SET_ALS_ILLUM (1 << 0)
115 #define ASLE_SET_BACKLIGHT (1 << 1)
116 #define ASLE_SET_PFIT (1 << 2)
117 #define ASLE_SET_PWM_FREQ (1 << 3)
118 #define ASLE_REQ_MSK 0xf
120 /* response bits of ASLE irq request */
121 #define ASLE_ALS_ILLUM_FAILED (1<<10)
122 #define ASLE_BACKLIGHT_FAILED (1<<12)
123 #define ASLE_PFIT_FAILED (1<<14)
124 #define ASLE_PWM_FREQ_FAILED (1<<16)
126 /* ASLE backlight brightness to set */
127 #define ASLE_BCLP_VALID (1<<31)
128 #define ASLE_BCLP_MSK (~(1<<31))
130 /* ASLE panel fitting request */
131 #define ASLE_PFIT_VALID (1<<31)
132 #define ASLE_PFIT_CENTER (1<<0)
133 #define ASLE_PFIT_STRETCH_TEXT (1<<1)
134 #define ASLE_PFIT_STRETCH_GFX (1<<2)
136 /* PWM frequency and minimum brightness */
137 #define ASLE_PFMB_BRIGHTNESS_MASK (0xff)
138 #define ASLE_PFMB_BRIGHTNESS_VALID (1<<8)
139 #define ASLE_PFMB_PWM_MASK (0x7ffffe00)
140 #define ASLE_PFMB_PWM_VALID (1<<31)
142 #define ASLE_CBLV_VALID (1<<31)
144 #define ACPI_OTHER_OUTPUT (0<<8)
145 #define ACPI_VGA_OUTPUT (1<<8)
146 #define ACPI_TV_OUTPUT (2<<8)
147 #define ACPI_DIGITAL_OUTPUT (3<<8)
148 #define ACPI_LVDS_OUTPUT (4<<8)
151 static u32 asle_set_backlight(struct drm_device *dev, u32 bclp)
153 struct drm_i915_private *dev_priv = dev->dev_private;
154 struct opregion_asle __iomem *asle = dev_priv->opregion.asle;
157 if (!(bclp & ASLE_BCLP_VALID))
158 return ASLE_BACKLIGHT_FAILED;
160 bclp &= ASLE_BCLP_MSK;
162 return ASLE_BACKLIGHT_FAILED;
164 max = intel_panel_get_max_backlight(dev);
165 intel_panel_set_backlight(dev, bclp * max / 255);
166 iowrite32((bclp*0x64)/0xff | ASLE_CBLV_VALID, &asle->cblv);
171 static u32 asle_set_als_illum(struct drm_device *dev, u32 alsi)
173 /* alsi is the current ALS reading in lux. 0 indicates below sensor
174 range, 0xffff indicates above sensor range. 1-0xfffe are valid */
178 static u32 asle_set_pwm_freq(struct drm_device *dev, u32 pfmb)
180 struct drm_i915_private *dev_priv = dev->dev_private;
181 if (pfmb & ASLE_PFMB_PWM_VALID) {
182 u32 blc_pwm_ctl = I915_READ(BLC_PWM_CTL);
183 u32 pwm = pfmb & ASLE_PFMB_PWM_MASK;
184 blc_pwm_ctl &= BACKLIGHT_DUTY_CYCLE_MASK;
186 /* FIXME - what do we do with the PWM? */
191 static u32 asle_set_pfit(struct drm_device *dev, u32 pfit)
193 /* Panel fitting is currently controlled by the X code, so this is a
194 noop until modesetting support works fully */
195 if (!(pfit & ASLE_PFIT_VALID))
196 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 void intel_opregion_gse_intr(struct drm_device *dev)
234 struct drm_i915_private *dev_priv = dev->dev_private;
235 struct opregion_asle __iomem *asle = dev_priv->opregion.asle;
242 asle_req = ioread32(&asle->aslc) & ASLE_REQ_MSK;
245 DRM_DEBUG_DRIVER("non asle set request??\n");
249 if (asle_req & ASLE_SET_ALS_ILLUM) {
250 DRM_DEBUG_DRIVER("Illum is not supported\n");
251 asle_stat |= ASLE_ALS_ILLUM_FAILED;
254 if (asle_req & ASLE_SET_BACKLIGHT)
255 asle_stat |= asle_set_backlight(dev, ioread32(&asle->bclp));
257 if (asle_req & ASLE_SET_PFIT) {
258 DRM_DEBUG_DRIVER("Pfit is not supported\n");
259 asle_stat |= ASLE_PFIT_FAILED;
262 if (asle_req & ASLE_SET_PWM_FREQ) {
263 DRM_DEBUG_DRIVER("PWM freq is not supported\n");
264 asle_stat |= ASLE_PWM_FREQ_FAILED;
267 iowrite32(asle_stat, &asle->aslc);
269 #define ASLE_ALS_EN (1<<0)
270 #define ASLE_BLC_EN (1<<1)
271 #define ASLE_PFIT_EN (1<<2)
272 #define ASLE_PFMB_EN (1<<3)
274 void intel_opregion_enable_asle(struct drm_device *dev)
276 struct drm_i915_private *dev_priv = dev->dev_private;
277 struct opregion_asle __iomem *asle = dev_priv->opregion.asle;
281 intel_enable_asle(dev);
283 iowrite32(ASLE_ALS_EN | ASLE_BLC_EN | ASLE_PFIT_EN |
286 iowrite32(1, &asle->ardy);
290 #define ACPI_EV_DISPLAY_SWITCH (1<<0)
291 #define ACPI_EV_LID (1<<1)
292 #define ACPI_EV_DOCK (1<<2)
294 static struct intel_opregion *system_opregion;
296 static int intel_opregion_video_event(struct notifier_block *nb,
297 unsigned long val, void *data)
299 /* The only video events relevant to opregion are 0x80. These indicate
300 either a docking event, lid switch or display switch request. In
301 Linux, these are handled by the dock, button and video drivers.
304 struct opregion_acpi __iomem *acpi;
305 struct acpi_bus_event *event = data;
308 if (strcmp(event->device_class, ACPI_VIDEO_CLASS) != 0)
311 if (!system_opregion)
314 acpi = system_opregion->acpi;
316 if (event->type == 0x80 &&
317 (ioread32(&acpi->cevt) & 1) == 0)
320 iowrite32(0, &acpi->csts);
325 static struct notifier_block intel_opregion_notifier = {
326 .notifier_call = intel_opregion_video_event,
330 * Initialise the DIDL field in opregion. This passes a list of devices to
331 * the firmware. Values are defined by section B.4.2 of the ACPI specification
335 static void intel_didl_outputs(struct drm_device *dev)
337 struct drm_i915_private *dev_priv = dev->dev_private;
338 struct intel_opregion *opregion = &dev_priv->opregion;
339 struct drm_connector *connector;
341 struct acpi_device *acpi_dev, *acpi_cdev, *acpi_video_bus = NULL;
342 unsigned long long device_id;
347 handle = DEVICE_ACPI_HANDLE(&dev->pdev->dev);
348 if (!handle || ACPI_FAILURE(acpi_bus_get_device(handle, &acpi_dev)))
351 if (acpi_is_video_device(acpi_dev))
352 acpi_video_bus = acpi_dev;
354 list_for_each_entry(acpi_cdev, &acpi_dev->children, node) {
355 if (acpi_is_video_device(acpi_cdev)) {
356 acpi_video_bus = acpi_cdev;
362 if (!acpi_video_bus) {
363 pr_warn("No ACPI video bus found\n");
367 list_for_each_entry(acpi_cdev, &acpi_video_bus->children, node) {
369 dev_printk(KERN_ERR, &dev->pdev->dev,
370 "More than 8 outputs detected\n");
374 acpi_evaluate_integer(acpi_cdev->handle, "_ADR",
376 if (ACPI_SUCCESS(status)) {
379 iowrite32((u32)(device_id & 0x0f0f),
380 &opregion->acpi->didl[i]);
386 /* If fewer than 8 outputs, the list must be null terminated */
388 iowrite32(0, &opregion->acpi->didl[i]);
393 list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
394 int output_type = ACPI_OTHER_OUTPUT;
396 dev_printk(KERN_ERR, &dev->pdev->dev,
397 "More than 8 outputs detected\n");
400 switch (connector->connector_type) {
401 case DRM_MODE_CONNECTOR_VGA:
402 case DRM_MODE_CONNECTOR_DVIA:
403 output_type = ACPI_VGA_OUTPUT;
405 case DRM_MODE_CONNECTOR_Composite:
406 case DRM_MODE_CONNECTOR_SVIDEO:
407 case DRM_MODE_CONNECTOR_Component:
408 case DRM_MODE_CONNECTOR_9PinDIN:
409 output_type = ACPI_TV_OUTPUT;
411 case DRM_MODE_CONNECTOR_DVII:
412 case DRM_MODE_CONNECTOR_DVID:
413 case DRM_MODE_CONNECTOR_DisplayPort:
414 case DRM_MODE_CONNECTOR_HDMIA:
415 case DRM_MODE_CONNECTOR_HDMIB:
416 output_type = ACPI_DIGITAL_OUTPUT;
418 case DRM_MODE_CONNECTOR_LVDS:
419 output_type = ACPI_LVDS_OUTPUT;
422 temp = ioread32(&opregion->acpi->didl[i]);
423 iowrite32(temp | (1<<31) | output_type | i,
424 &opregion->acpi->didl[i]);
430 static void intel_setup_cadls(struct drm_device *dev)
432 struct drm_i915_private *dev_priv = dev->dev_private;
433 struct intel_opregion *opregion = &dev_priv->opregion;
437 /* Initialize the CADL field by duplicating the DIDL values.
438 * Technically, this is not always correct as display outputs may exist,
439 * but not active. This initialization is necessary for some Clevo
440 * laptops that check this field before processing the brightness and
441 * display switching hotkeys. Just like DIDL, CADL is NULL-terminated if
442 * there are less than eight devices. */
444 disp_id = ioread32(&opregion->acpi->didl[i]);
445 iowrite32(disp_id, &opregion->acpi->cadl[i]);
446 } while (++i < 8 && disp_id != 0);
449 void intel_opregion_init(struct drm_device *dev)
451 struct drm_i915_private *dev_priv = dev->dev_private;
452 struct intel_opregion *opregion = &dev_priv->opregion;
454 if (!opregion->header)
457 if (opregion->acpi) {
458 if (drm_core_check_feature(dev, DRIVER_MODESET)) {
459 intel_didl_outputs(dev);
460 intel_setup_cadls(dev);
463 /* Notify BIOS we are ready to handle ACPI video ext notifs.
464 * Right now, all the events are handled by the ACPI video module.
465 * We don't actually need to do anything with them. */
466 iowrite32(0, &opregion->acpi->csts);
467 iowrite32(1, &opregion->acpi->drdy);
469 system_opregion = opregion;
470 register_acpi_notifier(&intel_opregion_notifier);
474 intel_opregion_enable_asle(dev);
477 void intel_opregion_fini(struct drm_device *dev)
479 struct drm_i915_private *dev_priv = dev->dev_private;
480 struct intel_opregion *opregion = &dev_priv->opregion;
482 if (!opregion->header)
485 if (opregion->acpi) {
486 iowrite32(0, &opregion->acpi->drdy);
488 system_opregion = NULL;
489 unregister_acpi_notifier(&intel_opregion_notifier);
492 /* just clear all opregion memory pointers now */
493 iounmap(opregion->header);
494 opregion->header = NULL;
495 opregion->acpi = NULL;
496 opregion->swsci = NULL;
497 opregion->asle = NULL;
498 opregion->vbt = NULL;
502 int intel_opregion_setup(struct drm_device *dev)
504 struct drm_i915_private *dev_priv = dev->dev_private;
505 struct intel_opregion *opregion = &dev_priv->opregion;
508 char buf[sizeof(OPREGION_SIGNATURE)];
511 pci_read_config_dword(dev->pdev, PCI_ASLS, &asls);
512 DRM_DEBUG_DRIVER("graphic opregion physical addr: 0x%x\n", asls);
514 DRM_DEBUG_DRIVER("ACPI OpRegion not supported!\n");
518 base = acpi_os_ioremap(asls, OPREGION_SIZE);
522 memcpy_fromio(buf, base, sizeof(buf));
524 if (memcmp(buf, OPREGION_SIGNATURE, 16)) {
525 DRM_DEBUG_DRIVER("opregion signature mismatch\n");
529 opregion->header = base;
530 opregion->vbt = base + OPREGION_VBT_OFFSET;
532 opregion->lid_state = base + ACPI_CLID;
534 mboxes = ioread32(&opregion->header->mboxes);
535 if (mboxes & MBOX_ACPI) {
536 DRM_DEBUG_DRIVER("Public ACPI methods supported\n");
537 opregion->acpi = base + OPREGION_ACPI_OFFSET;
540 if (mboxes & MBOX_SWSCI) {
541 DRM_DEBUG_DRIVER("SWSCI supported\n");
542 opregion->swsci = base + OPREGION_SWSCI_OFFSET;
544 if (mboxes & MBOX_ASLE) {
545 DRM_DEBUG_DRIVER("ASLE supported\n");
546 opregion->asle = base + OPREGION_ASLE_OFFSET;