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>
39 #define OPREGION_SZ (8*1024)
40 #define OPREGION_HEADER_OFFSET 0
41 #define OPREGION_ACPI_OFFSET 0x100
42 #define OPREGION_SWSCI_OFFSET 0x200
43 #define OPREGION_ASLE_OFFSET 0x300
44 #define OPREGION_VBT_OFFSET 0x1000
46 #define OPREGION_SIGNATURE "IntelGraphicsMem"
47 #define MBOX_ACPI (1<<0)
48 #define MBOX_SWSCI (1<<1)
49 #define MBOX_ASLE (1<<2)
51 struct opregion_header {
60 } __attribute__((packed));
62 /* OpRegion mailbox #1: public ACPI methods */
63 struct opregion_acpi {
64 u32 drdy; /* driver readiness */
65 u32 csts; /* notification status */
66 u32 cevt; /* current event */
68 u32 didl[8]; /* supported display devices ID list */
69 u32 cpdl[8]; /* currently presented display list */
70 u32 cadl[8]; /* currently active display list */
71 u32 nadl[8]; /* next active devices list */
72 u32 aslp; /* ASL sleep time-out */
73 u32 tidx; /* toggle table index */
74 u32 chpd; /* current hotplug enable indicator */
75 u32 clid; /* current lid state*/
76 u32 cdck; /* current docking state */
77 u32 sxsw; /* Sx state resume */
78 u32 evts; /* ASL supported events */
79 u32 cnot; /* current OS notification */
80 u32 nrdy; /* driver status */
82 } __attribute__((packed));
84 /* OpRegion mailbox #2: SWSCI */
85 struct opregion_swsci {
86 u32 scic; /* SWSCI command|status|data */
87 u32 parm; /* command parameters */
88 u32 dslp; /* driver sleep time-out */
90 } __attribute__((packed));
92 /* OpRegion mailbox #3: ASLE */
93 struct opregion_asle {
94 u32 ardy; /* driver readiness */
95 u32 aslc; /* ASLE interrupt command */
96 u32 tche; /* technology enabled indicator */
97 u32 alsi; /* current ALS illuminance reading */
98 u32 bclp; /* backlight brightness to set */
99 u32 pfit; /* panel fitting state */
100 u32 cblv; /* current brightness level */
101 u16 bclm[20]; /* backlight level duty cycle mapping table */
102 u32 cpfm; /* current panel fitting mode */
103 u32 epfm; /* enabled panel fitting modes */
104 u8 plut[74]; /* panel LUT and identifier */
105 u32 pfmb; /* PWM freq and min brightness */
107 } __attribute__((packed));
109 /* ASLE irq request bits */
110 #define ASLE_SET_ALS_ILLUM (1 << 0)
111 #define ASLE_SET_BACKLIGHT (1 << 1)
112 #define ASLE_SET_PFIT (1 << 2)
113 #define ASLE_SET_PWM_FREQ (1 << 3)
114 #define ASLE_REQ_MSK 0xf
116 /* response bits of ASLE irq request */
117 #define ASLE_ALS_ILLUM_FAILED (1<<10)
118 #define ASLE_BACKLIGHT_FAILED (1<<12)
119 #define ASLE_PFIT_FAILED (1<<14)
120 #define ASLE_PWM_FREQ_FAILED (1<<16)
122 /* ASLE backlight brightness to set */
123 #define ASLE_BCLP_VALID (1<<31)
124 #define ASLE_BCLP_MSK (~(1<<31))
126 /* ASLE panel fitting request */
127 #define ASLE_PFIT_VALID (1<<31)
128 #define ASLE_PFIT_CENTER (1<<0)
129 #define ASLE_PFIT_STRETCH_TEXT (1<<1)
130 #define ASLE_PFIT_STRETCH_GFX (1<<2)
132 /* PWM frequency and minimum brightness */
133 #define ASLE_PFMB_BRIGHTNESS_MASK (0xff)
134 #define ASLE_PFMB_BRIGHTNESS_VALID (1<<8)
135 #define ASLE_PFMB_PWM_MASK (0x7ffffe00)
136 #define ASLE_PFMB_PWM_VALID (1<<31)
138 #define ASLE_CBLV_VALID (1<<31)
140 #define ACPI_OTHER_OUTPUT (0<<8)
141 #define ACPI_VGA_OUTPUT (1<<8)
142 #define ACPI_TV_OUTPUT (2<<8)
143 #define ACPI_DIGITAL_OUTPUT (3<<8)
144 #define ACPI_LVDS_OUTPUT (4<<8)
146 static u32 asle_set_backlight(struct drm_device *dev, u32 bclp)
148 struct drm_i915_private *dev_priv = dev->dev_private;
149 struct opregion_asle *asle = dev_priv->opregion.asle;
150 u32 blc_pwm_ctl, blc_pwm_ctl2;
151 u32 max_backlight, level, shift;
153 if (!(bclp & ASLE_BCLP_VALID))
154 return ASLE_BACKLIGHT_FAILED;
156 bclp &= ASLE_BCLP_MSK;
157 if (bclp < 0 || bclp > 255)
158 return ASLE_BACKLIGHT_FAILED;
160 blc_pwm_ctl = I915_READ(BLC_PWM_CTL);
161 blc_pwm_ctl2 = I915_READ(BLC_PWM_CTL2);
163 if (IS_I965G(dev) && (blc_pwm_ctl2 & BLM_COMBINATION_MODE))
164 pci_write_config_dword(dev->pdev, PCI_LBPC, bclp);
166 if (IS_PINEVIEW(dev)) {
167 blc_pwm_ctl &= ~(BACKLIGHT_DUTY_CYCLE_MASK - 1);
168 max_backlight = (blc_pwm_ctl & BACKLIGHT_MODULATION_FREQ_MASK) >>
169 BACKLIGHT_MODULATION_FREQ_SHIFT;
170 shift = BACKLIGHT_DUTY_CYCLE_SHIFT + 1;
172 blc_pwm_ctl &= ~BACKLIGHT_DUTY_CYCLE_MASK;
173 max_backlight = ((blc_pwm_ctl & BACKLIGHT_MODULATION_FREQ_MASK) >>
174 BACKLIGHT_MODULATION_FREQ_SHIFT) * 2;
175 shift = BACKLIGHT_DUTY_CYCLE_SHIFT;
177 level = (bclp * max_backlight) / 255;
178 I915_WRITE(BLC_PWM_CTL, blc_pwm_ctl | (level << shift));
180 asle->cblv = (bclp*0x64)/0xff | ASLE_CBLV_VALID;
185 static u32 asle_set_als_illum(struct drm_device *dev, u32 alsi)
187 /* alsi is the current ALS reading in lux. 0 indicates below sensor
188 range, 0xffff indicates above sensor range. 1-0xfffe are valid */
192 static u32 asle_set_pwm_freq(struct drm_device *dev, u32 pfmb)
194 struct drm_i915_private *dev_priv = dev->dev_private;
195 if (pfmb & ASLE_PFMB_PWM_VALID) {
196 u32 blc_pwm_ctl = I915_READ(BLC_PWM_CTL);
197 u32 pwm = pfmb & ASLE_PFMB_PWM_MASK;
198 blc_pwm_ctl &= BACKLIGHT_DUTY_CYCLE_MASK;
200 /* FIXME - what do we do with the PWM? */
205 static u32 asle_set_pfit(struct drm_device *dev, u32 pfit)
207 /* Panel fitting is currently controlled by the X code, so this is a
208 noop until modesetting support works fully */
209 if (!(pfit & ASLE_PFIT_VALID))
210 return ASLE_PFIT_FAILED;
214 void opregion_asle_intr(struct drm_device *dev)
216 struct drm_i915_private *dev_priv = dev->dev_private;
217 struct opregion_asle *asle = dev_priv->opregion.asle;
224 asle_req = asle->aslc & ASLE_REQ_MSK;
227 DRM_DEBUG_DRIVER("non asle set request??\n");
231 if (asle_req & ASLE_SET_ALS_ILLUM)
232 asle_stat |= asle_set_als_illum(dev, asle->alsi);
234 if (asle_req & ASLE_SET_BACKLIGHT)
235 asle_stat |= asle_set_backlight(dev, asle->bclp);
237 if (asle_req & ASLE_SET_PFIT)
238 asle_stat |= asle_set_pfit(dev, asle->pfit);
240 if (asle_req & ASLE_SET_PWM_FREQ)
241 asle_stat |= asle_set_pwm_freq(dev, asle->pfmb);
243 asle->aslc = asle_stat;
246 static u32 asle_set_backlight_ironlake(struct drm_device *dev, u32 bclp)
248 struct drm_i915_private *dev_priv = dev->dev_private;
249 struct opregion_asle *asle = dev_priv->opregion.asle;
250 u32 cpu_pwm_ctl, pch_pwm_ctl2;
251 u32 max_backlight, level;
253 if (!(bclp & ASLE_BCLP_VALID))
254 return ASLE_BACKLIGHT_FAILED;
256 bclp &= ASLE_BCLP_MSK;
257 if (bclp < 0 || bclp > 255)
258 return ASLE_BACKLIGHT_FAILED;
260 cpu_pwm_ctl = I915_READ(BLC_PWM_CPU_CTL);
261 pch_pwm_ctl2 = I915_READ(BLC_PWM_PCH_CTL2);
262 /* get the max PWM frequency */
263 max_backlight = (pch_pwm_ctl2 >> 16) & BACKLIGHT_DUTY_CYCLE_MASK;
264 /* calculate the expected PMW frequency */
265 level = (bclp * max_backlight) / 255;
266 /* reserve the high 16 bits */
267 cpu_pwm_ctl &= ~(BACKLIGHT_DUTY_CYCLE_MASK);
268 /* write the updated PWM frequency */
269 I915_WRITE(BLC_PWM_CPU_CTL, cpu_pwm_ctl | level);
271 asle->cblv = (bclp*0x64)/0xff | ASLE_CBLV_VALID;
276 void ironlake_opregion_gse_intr(struct drm_device *dev)
278 struct drm_i915_private *dev_priv = dev->dev_private;
279 struct opregion_asle *asle = dev_priv->opregion.asle;
286 asle_req = asle->aslc & ASLE_REQ_MSK;
289 DRM_DEBUG_DRIVER("non asle set request??\n");
293 if (asle_req & ASLE_SET_ALS_ILLUM) {
294 DRM_DEBUG_DRIVER("Illum is not supported\n");
295 asle_stat |= ASLE_ALS_ILLUM_FAILED;
298 if (asle_req & ASLE_SET_BACKLIGHT)
299 asle_stat |= asle_set_backlight_ironlake(dev, asle->bclp);
301 if (asle_req & ASLE_SET_PFIT) {
302 DRM_DEBUG_DRIVER("Pfit is not supported\n");
303 asle_stat |= ASLE_PFIT_FAILED;
306 if (asle_req & ASLE_SET_PWM_FREQ) {
307 DRM_DEBUG_DRIVER("PWM freq is not supported\n");
308 asle_stat |= ASLE_PWM_FREQ_FAILED;
311 asle->aslc = asle_stat;
313 #define ASLE_ALS_EN (1<<0)
314 #define ASLE_BLC_EN (1<<1)
315 #define ASLE_PFIT_EN (1<<2)
316 #define ASLE_PFMB_EN (1<<3)
318 void opregion_enable_asle(struct drm_device *dev)
320 struct drm_i915_private *dev_priv = dev->dev_private;
321 struct opregion_asle *asle = dev_priv->opregion.asle;
324 if (IS_MOBILE(dev)) {
325 unsigned long irqflags;
327 spin_lock_irqsave(&dev_priv->user_irq_lock, irqflags);
328 intel_enable_asle(dev);
329 spin_unlock_irqrestore(&dev_priv->user_irq_lock,
333 asle->tche = ASLE_ALS_EN | ASLE_BLC_EN | ASLE_PFIT_EN |
339 #define ACPI_EV_DISPLAY_SWITCH (1<<0)
340 #define ACPI_EV_LID (1<<1)
341 #define ACPI_EV_DOCK (1<<2)
343 static struct intel_opregion *system_opregion;
345 static int intel_opregion_video_event(struct notifier_block *nb,
346 unsigned long val, void *data)
348 /* The only video events relevant to opregion are 0x80. These indicate
349 either a docking event, lid switch or display switch request. In
350 Linux, these are handled by the dock, button and video drivers.
351 We might want to fix the video driver to be opregion-aware in
352 future, but right now we just indicate to the firmware that the
353 request has been handled */
355 struct opregion_acpi *acpi;
357 if (!system_opregion)
360 acpi = system_opregion->acpi;
366 static struct notifier_block intel_opregion_notifier = {
367 .notifier_call = intel_opregion_video_event,
371 * Initialise the DIDL field in opregion. This passes a list of devices to
372 * the firmware. Values are defined by section B.4.2 of the ACPI specification
376 static void intel_didl_outputs(struct drm_device *dev)
378 struct drm_i915_private *dev_priv = dev->dev_private;
379 struct intel_opregion *opregion = &dev_priv->opregion;
380 struct drm_connector *connector;
382 struct acpi_device *acpi_dev, *acpi_cdev, *acpi_video_bus = NULL;
383 unsigned long long device_id;
387 handle = DEVICE_ACPI_HANDLE(&dev->pdev->dev);
388 if (!handle || ACPI_FAILURE(acpi_bus_get_device(handle, &acpi_dev)))
391 if (acpi_is_video_device(acpi_dev))
392 acpi_video_bus = acpi_dev;
394 list_for_each_entry(acpi_cdev, &acpi_dev->children, node) {
395 if (acpi_is_video_device(acpi_cdev)) {
396 acpi_video_bus = acpi_cdev;
402 if (!acpi_video_bus) {
403 printk(KERN_WARNING "No ACPI video bus found\n");
407 list_for_each_entry(acpi_cdev, &acpi_video_bus->children, node) {
409 dev_printk (KERN_ERR, &dev->pdev->dev,
410 "More than 8 outputs detected\n");
414 acpi_evaluate_integer(acpi_cdev->handle, "_ADR",
416 if (ACPI_SUCCESS(status)) {
419 opregion->acpi->didl[i] = (u32)(device_id & 0x0f0f);
425 /* If fewer than 8 outputs, the list must be null terminated */
427 opregion->acpi->didl[i] = 0;
432 list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
433 int output_type = ACPI_OTHER_OUTPUT;
435 dev_printk (KERN_ERR, &dev->pdev->dev,
436 "More than 8 outputs detected\n");
439 switch (connector->connector_type) {
440 case DRM_MODE_CONNECTOR_VGA:
441 case DRM_MODE_CONNECTOR_DVIA:
442 output_type = ACPI_VGA_OUTPUT;
444 case DRM_MODE_CONNECTOR_Composite:
445 case DRM_MODE_CONNECTOR_SVIDEO:
446 case DRM_MODE_CONNECTOR_Component:
447 case DRM_MODE_CONNECTOR_9PinDIN:
448 output_type = ACPI_TV_OUTPUT;
450 case DRM_MODE_CONNECTOR_DVII:
451 case DRM_MODE_CONNECTOR_DVID:
452 case DRM_MODE_CONNECTOR_DisplayPort:
453 case DRM_MODE_CONNECTOR_HDMIA:
454 case DRM_MODE_CONNECTOR_HDMIB:
455 output_type = ACPI_DIGITAL_OUTPUT;
457 case DRM_MODE_CONNECTOR_LVDS:
458 output_type = ACPI_LVDS_OUTPUT;
461 opregion->acpi->didl[i] |= (1<<31) | output_type | i;
467 int intel_opregion_init(struct drm_device *dev, int resume)
469 struct drm_i915_private *dev_priv = dev->dev_private;
470 struct intel_opregion *opregion = &dev_priv->opregion;
475 pci_read_config_dword(dev->pdev, PCI_ASLS, &asls);
476 DRM_DEBUG_DRIVER("graphic opregion physical addr: 0x%x\n", asls);
478 DRM_DEBUG_DRIVER("ACPI OpRegion not supported!\n");
482 base = ioremap(asls, OPREGION_SZ);
486 opregion->header = base;
487 if (memcmp(opregion->header->signature, OPREGION_SIGNATURE, 16)) {
488 DRM_DEBUG_DRIVER("opregion signature mismatch\n");
493 mboxes = opregion->header->mboxes;
494 if (mboxes & MBOX_ACPI) {
495 DRM_DEBUG_DRIVER("Public ACPI methods supported\n");
496 opregion->acpi = base + OPREGION_ACPI_OFFSET;
497 if (drm_core_check_feature(dev, DRIVER_MODESET))
498 intel_didl_outputs(dev);
500 DRM_DEBUG_DRIVER("Public ACPI methods not supported\n");
504 opregion->enabled = 1;
506 if (mboxes & MBOX_SWSCI) {
507 DRM_DEBUG_DRIVER("SWSCI supported\n");
508 opregion->swsci = base + OPREGION_SWSCI_OFFSET;
510 if (mboxes & MBOX_ASLE) {
511 DRM_DEBUG_DRIVER("ASLE supported\n");
512 opregion->asle = base + OPREGION_ASLE_OFFSET;
513 opregion_enable_asle(dev);
517 acpi_video_register();
520 /* Notify BIOS we are ready to handle ACPI video ext notifs.
521 * Right now, all the events are handled by the ACPI video module.
522 * We don't actually need to do anything with them. */
523 opregion->acpi->csts = 0;
524 opregion->acpi->drdy = 1;
526 system_opregion = opregion;
527 register_acpi_notifier(&intel_opregion_notifier);
532 iounmap(opregion->header);
533 opregion->header = NULL;
534 acpi_video_register();
538 void intel_opregion_free(struct drm_device *dev, int suspend)
540 struct drm_i915_private *dev_priv = dev->dev_private;
541 struct intel_opregion *opregion = &dev_priv->opregion;
543 if (!opregion->enabled)
547 acpi_video_unregister();
549 opregion->acpi->drdy = 0;
551 system_opregion = NULL;
552 unregister_acpi_notifier(&intel_opregion_notifier);
554 /* just clear all opregion memory pointers now */
555 iounmap(opregion->header);
556 opregion->header = NULL;
557 opregion->acpi = NULL;
558 opregion->swsci = NULL;
559 opregion->asle = NULL;
561 opregion->enabled = 0;