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>
34 #include "intel_drv.h"
39 #define OPREGION_HEADER_OFFSET 0
40 #define OPREGION_ACPI_OFFSET 0x100
41 #define OPREGION_SWSCI_OFFSET 0x200
42 #define OPREGION_ASLE_OFFSET 0x300
43 #define OPREGION_VBT_OFFSET 0x400
45 #define OPREGION_SIGNATURE "IntelGraphicsMem"
46 #define MBOX_ACPI (1<<0)
47 #define MBOX_SWSCI (1<<1)
48 #define MBOX_ASLE (1<<2)
50 struct opregion_header {
59 } __attribute__((packed));
61 /* OpRegion mailbox #1: public ACPI methods */
62 struct opregion_acpi {
63 u32 drdy; /* driver readiness */
64 u32 csts; /* notification status */
65 u32 cevt; /* current event */
67 u32 didl[8]; /* supported display devices ID list */
68 u32 cpdl[8]; /* currently presented display list */
69 u32 cadl[8]; /* currently active display list */
70 u32 nadl[8]; /* next active devices list */
71 u32 aslp; /* ASL sleep time-out */
72 u32 tidx; /* toggle table index */
73 u32 chpd; /* current hotplug enable indicator */
74 u32 clid; /* current lid state*/
75 u32 cdck; /* current docking state */
76 u32 sxsw; /* Sx state resume */
77 u32 evts; /* ASL supported events */
78 u32 cnot; /* current OS notification */
79 u32 nrdy; /* driver status */
81 } __attribute__((packed));
83 /* OpRegion mailbox #2: SWSCI */
84 struct opregion_swsci {
85 u32 scic; /* SWSCI command|status|data */
86 u32 parm; /* command parameters */
87 u32 dslp; /* driver sleep time-out */
89 } __attribute__((packed));
91 /* OpRegion mailbox #3: ASLE */
92 struct opregion_asle {
93 u32 ardy; /* driver readiness */
94 u32 aslc; /* ASLE interrupt command */
95 u32 tche; /* technology enabled indicator */
96 u32 alsi; /* current ALS illuminance reading */
97 u32 bclp; /* backlight brightness to set */
98 u32 pfit; /* panel fitting state */
99 u32 cblv; /* current brightness level */
100 u16 bclm[20]; /* backlight level duty cycle mapping table */
101 u32 cpfm; /* current panel fitting mode */
102 u32 epfm; /* enabled panel fitting modes */
103 u8 plut[74]; /* panel LUT and identifier */
104 u32 pfmb; /* PWM freq and min brightness */
106 } __attribute__((packed));
108 /* ASLE irq request bits */
109 #define ASLE_SET_ALS_ILLUM (1 << 0)
110 #define ASLE_SET_BACKLIGHT (1 << 1)
111 #define ASLE_SET_PFIT (1 << 2)
112 #define ASLE_SET_PWM_FREQ (1 << 3)
113 #define ASLE_REQ_MSK 0xf
115 /* response bits of ASLE irq request */
116 #define ASLE_ALS_ILLUM_FAILED (1<<10)
117 #define ASLE_BACKLIGHT_FAILED (1<<12)
118 #define ASLE_PFIT_FAILED (1<<14)
119 #define ASLE_PWM_FREQ_FAILED (1<<16)
121 /* ASLE backlight brightness to set */
122 #define ASLE_BCLP_VALID (1<<31)
123 #define ASLE_BCLP_MSK (~(1<<31))
125 /* ASLE panel fitting request */
126 #define ASLE_PFIT_VALID (1<<31)
127 #define ASLE_PFIT_CENTER (1<<0)
128 #define ASLE_PFIT_STRETCH_TEXT (1<<1)
129 #define ASLE_PFIT_STRETCH_GFX (1<<2)
131 /* PWM frequency and minimum brightness */
132 #define ASLE_PFMB_BRIGHTNESS_MASK (0xff)
133 #define ASLE_PFMB_BRIGHTNESS_VALID (1<<8)
134 #define ASLE_PFMB_PWM_MASK (0x7ffffe00)
135 #define ASLE_PFMB_PWM_VALID (1<<31)
137 #define ASLE_CBLV_VALID (1<<31)
139 #define ACPI_OTHER_OUTPUT (0<<8)
140 #define ACPI_VGA_OUTPUT (1<<8)
141 #define ACPI_TV_OUTPUT (2<<8)
142 #define ACPI_DIGITAL_OUTPUT (3<<8)
143 #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;
152 if (!(bclp & ASLE_BCLP_VALID))
153 return ASLE_BACKLIGHT_FAILED;
155 bclp &= ASLE_BCLP_MSK;
157 return ASLE_BACKLIGHT_FAILED;
159 max = intel_panel_get_max_backlight(dev);
160 intel_panel_set_backlight(dev, bclp * max / 255);
161 asle->cblv = (bclp*0x64)/0xff | ASLE_CBLV_VALID;
166 static u32 asle_set_als_illum(struct drm_device *dev, u32 alsi)
168 /* alsi is the current ALS reading in lux. 0 indicates below sensor
169 range, 0xffff indicates above sensor range. 1-0xfffe are valid */
173 static u32 asle_set_pwm_freq(struct drm_device *dev, u32 pfmb)
175 struct drm_i915_private *dev_priv = dev->dev_private;
176 if (pfmb & ASLE_PFMB_PWM_VALID) {
177 u32 blc_pwm_ctl = I915_READ(BLC_PWM_CTL);
178 u32 pwm = pfmb & ASLE_PFMB_PWM_MASK;
179 blc_pwm_ctl &= BACKLIGHT_DUTY_CYCLE_MASK;
181 /* FIXME - what do we do with the PWM? */
186 static u32 asle_set_pfit(struct drm_device *dev, u32 pfit)
188 /* Panel fitting is currently controlled by the X code, so this is a
189 noop until modesetting support works fully */
190 if (!(pfit & ASLE_PFIT_VALID))
191 return ASLE_PFIT_FAILED;
195 void intel_opregion_asle_intr(struct drm_device *dev)
197 struct drm_i915_private *dev_priv = dev->dev_private;
198 struct opregion_asle *asle = dev_priv->opregion.asle;
205 asle_req = asle->aslc & ASLE_REQ_MSK;
208 DRM_DEBUG_DRIVER("non asle set request??\n");
212 if (asle_req & ASLE_SET_ALS_ILLUM)
213 asle_stat |= asle_set_als_illum(dev, asle->alsi);
215 if (asle_req & ASLE_SET_BACKLIGHT)
216 asle_stat |= asle_set_backlight(dev, asle->bclp);
218 if (asle_req & ASLE_SET_PFIT)
219 asle_stat |= asle_set_pfit(dev, asle->pfit);
221 if (asle_req & ASLE_SET_PWM_FREQ)
222 asle_stat |= asle_set_pwm_freq(dev, asle->pfmb);
224 asle->aslc = asle_stat;
227 /* Only present on Ironlake+ */
228 void intel_opregion_gse_intr(struct drm_device *dev)
230 struct drm_i915_private *dev_priv = dev->dev_private;
231 struct opregion_asle *asle = dev_priv->opregion.asle;
238 asle_req = asle->aslc & ASLE_REQ_MSK;
241 DRM_DEBUG_DRIVER("non asle set request??\n");
245 if (asle_req & ASLE_SET_ALS_ILLUM) {
246 DRM_DEBUG_DRIVER("Illum is not supported\n");
247 asle_stat |= ASLE_ALS_ILLUM_FAILED;
250 if (asle_req & ASLE_SET_BACKLIGHT)
251 asle_stat |= asle_set_backlight(dev, asle->bclp);
253 if (asle_req & ASLE_SET_PFIT) {
254 DRM_DEBUG_DRIVER("Pfit is not supported\n");
255 asle_stat |= ASLE_PFIT_FAILED;
258 if (asle_req & ASLE_SET_PWM_FREQ) {
259 DRM_DEBUG_DRIVER("PWM freq is not supported\n");
260 asle_stat |= ASLE_PWM_FREQ_FAILED;
263 asle->aslc = asle_stat;
265 #define ASLE_ALS_EN (1<<0)
266 #define ASLE_BLC_EN (1<<1)
267 #define ASLE_PFIT_EN (1<<2)
268 #define ASLE_PFMB_EN (1<<3)
270 void intel_opregion_enable_asle(struct drm_device *dev)
272 struct drm_i915_private *dev_priv = dev->dev_private;
273 struct opregion_asle *asle = dev_priv->opregion.asle;
276 if (IS_MOBILE(dev)) {
277 unsigned long irqflags;
279 spin_lock_irqsave(&dev_priv->user_irq_lock, irqflags);
280 intel_enable_asle(dev);
281 spin_unlock_irqrestore(&dev_priv->user_irq_lock,
285 asle->tche = ASLE_ALS_EN | ASLE_BLC_EN | ASLE_PFIT_EN |
291 #define ACPI_EV_DISPLAY_SWITCH (1<<0)
292 #define ACPI_EV_LID (1<<1)
293 #define ACPI_EV_DOCK (1<<2)
295 static struct intel_opregion *system_opregion;
297 static int intel_opregion_video_event(struct notifier_block *nb,
298 unsigned long val, void *data)
300 /* The only video events relevant to opregion are 0x80. These indicate
301 either a docking event, lid switch or display switch request. In
302 Linux, these are handled by the dock, button and video drivers.
303 We might want to fix the video driver to be opregion-aware in
304 future, but right now we just indicate to the firmware that the
305 request has been handled */
307 struct opregion_acpi *acpi;
309 if (!system_opregion)
312 acpi = system_opregion->acpi;
318 static struct notifier_block intel_opregion_notifier = {
319 .notifier_call = intel_opregion_video_event,
323 * Initialise the DIDL field in opregion. This passes a list of devices to
324 * the firmware. Values are defined by section B.4.2 of the ACPI specification
328 static void intel_didl_outputs(struct drm_device *dev)
330 struct drm_i915_private *dev_priv = dev->dev_private;
331 struct intel_opregion *opregion = &dev_priv->opregion;
332 struct drm_connector *connector;
334 struct acpi_device *acpi_dev, *acpi_cdev, *acpi_video_bus = NULL;
335 unsigned long long device_id;
339 handle = DEVICE_ACPI_HANDLE(&dev->pdev->dev);
340 if (!handle || ACPI_FAILURE(acpi_bus_get_device(handle, &acpi_dev)))
343 if (acpi_is_video_device(acpi_dev))
344 acpi_video_bus = acpi_dev;
346 list_for_each_entry(acpi_cdev, &acpi_dev->children, node) {
347 if (acpi_is_video_device(acpi_cdev)) {
348 acpi_video_bus = acpi_cdev;
354 if (!acpi_video_bus) {
355 printk(KERN_WARNING "No ACPI video bus found\n");
359 list_for_each_entry(acpi_cdev, &acpi_video_bus->children, node) {
361 dev_printk (KERN_ERR, &dev->pdev->dev,
362 "More than 8 outputs detected\n");
366 acpi_evaluate_integer(acpi_cdev->handle, "_ADR",
368 if (ACPI_SUCCESS(status)) {
371 opregion->acpi->didl[i] = (u32)(device_id & 0x0f0f);
377 /* If fewer than 8 outputs, the list must be null terminated */
379 opregion->acpi->didl[i] = 0;
384 list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
385 int output_type = ACPI_OTHER_OUTPUT;
387 dev_printk (KERN_ERR, &dev->pdev->dev,
388 "More than 8 outputs detected\n");
391 switch (connector->connector_type) {
392 case DRM_MODE_CONNECTOR_VGA:
393 case DRM_MODE_CONNECTOR_DVIA:
394 output_type = ACPI_VGA_OUTPUT;
396 case DRM_MODE_CONNECTOR_Composite:
397 case DRM_MODE_CONNECTOR_SVIDEO:
398 case DRM_MODE_CONNECTOR_Component:
399 case DRM_MODE_CONNECTOR_9PinDIN:
400 output_type = ACPI_TV_OUTPUT;
402 case DRM_MODE_CONNECTOR_DVII:
403 case DRM_MODE_CONNECTOR_DVID:
404 case DRM_MODE_CONNECTOR_DisplayPort:
405 case DRM_MODE_CONNECTOR_HDMIA:
406 case DRM_MODE_CONNECTOR_HDMIB:
407 output_type = ACPI_DIGITAL_OUTPUT;
409 case DRM_MODE_CONNECTOR_LVDS:
410 output_type = ACPI_LVDS_OUTPUT;
413 opregion->acpi->didl[i] |= (1<<31) | output_type | i;
419 void intel_opregion_init(struct drm_device *dev)
421 struct drm_i915_private *dev_priv = dev->dev_private;
422 struct intel_opregion *opregion = &dev_priv->opregion;
424 if (!opregion->header)
427 if (opregion->acpi) {
428 if (drm_core_check_feature(dev, DRIVER_MODESET))
429 intel_didl_outputs(dev);
431 /* Notify BIOS we are ready to handle ACPI video ext notifs.
432 * Right now, all the events are handled by the ACPI video module.
433 * We don't actually need to do anything with them. */
434 opregion->acpi->csts = 0;
435 opregion->acpi->drdy = 1;
437 system_opregion = opregion;
438 register_acpi_notifier(&intel_opregion_notifier);
442 intel_opregion_enable_asle(dev);
445 void intel_opregion_fini(struct drm_device *dev)
447 struct drm_i915_private *dev_priv = dev->dev_private;
448 struct intel_opregion *opregion = &dev_priv->opregion;
450 if (!opregion->header)
453 if (opregion->acpi) {
454 opregion->acpi->drdy = 0;
456 system_opregion = NULL;
457 unregister_acpi_notifier(&intel_opregion_notifier);
460 /* just clear all opregion memory pointers now */
461 iounmap(opregion->header);
462 opregion->header = NULL;
463 opregion->acpi = NULL;
464 opregion->swsci = NULL;
465 opregion->asle = NULL;
466 opregion->vbt = NULL;
470 int intel_opregion_setup(struct drm_device *dev)
472 struct drm_i915_private *dev_priv = dev->dev_private;
473 struct intel_opregion *opregion = &dev_priv->opregion;
478 pci_read_config_dword(dev->pdev, PCI_ASLS, &asls);
479 DRM_DEBUG_DRIVER("graphic opregion physical addr: 0x%x\n", asls);
481 DRM_DEBUG_DRIVER("ACPI OpRegion not supported!\n");
485 base = ioremap(asls, OPREGION_SIZE);
489 if (memcmp(base, OPREGION_SIGNATURE, 16)) {
490 DRM_DEBUG_DRIVER("opregion signature mismatch\n");
494 opregion->header = base;
495 opregion->vbt = base + OPREGION_VBT_OFFSET;
497 mboxes = opregion->header->mboxes;
498 if (mboxes & MBOX_ACPI) {
499 DRM_DEBUG_DRIVER("Public ACPI methods supported\n");
500 opregion->acpi = base + OPREGION_ACPI_OFFSET;
503 if (mboxes & MBOX_SWSCI) {
504 DRM_DEBUG_DRIVER("SWSCI supported\n");
505 opregion->swsci = base + OPREGION_SWSCI_OFFSET;
507 if (mboxes & MBOX_ASLE) {
508 DRM_DEBUG_DRIVER("ASLE supported\n");
509 opregion->asle = base + OPREGION_ASLE_OFFSET;