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 <linux/acpi_io.h>
30 #include <acpi/video.h>
35 #include "intel_drv.h"
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 0x400
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)
147 static u32 asle_set_backlight(struct drm_device *dev, u32 bclp)
149 struct drm_i915_private *dev_priv = dev->dev_private;
150 struct opregion_asle *asle = dev_priv->opregion.asle;
153 if (!(bclp & ASLE_BCLP_VALID))
154 return ASLE_BACKLIGHT_FAILED;
156 bclp &= ASLE_BCLP_MSK;
158 return ASLE_BACKLIGHT_FAILED;
160 max = intel_panel_get_max_backlight(dev);
161 intel_panel_set_backlight(dev, bclp * max / 255);
162 asle->cblv = (bclp*0x64)/0xff | ASLE_CBLV_VALID;
167 static u32 asle_set_als_illum(struct drm_device *dev, u32 alsi)
169 /* alsi is the current ALS reading in lux. 0 indicates below sensor
170 range, 0xffff indicates above sensor range. 1-0xfffe are valid */
174 static u32 asle_set_pwm_freq(struct drm_device *dev, u32 pfmb)
176 struct drm_i915_private *dev_priv = dev->dev_private;
177 if (pfmb & ASLE_PFMB_PWM_VALID) {
178 u32 blc_pwm_ctl = I915_READ(BLC_PWM_CTL);
179 u32 pwm = pfmb & ASLE_PFMB_PWM_MASK;
180 blc_pwm_ctl &= BACKLIGHT_DUTY_CYCLE_MASK;
182 /* FIXME - what do we do with the PWM? */
187 static u32 asle_set_pfit(struct drm_device *dev, u32 pfit)
189 /* Panel fitting is currently controlled by the X code, so this is a
190 noop until modesetting support works fully */
191 if (!(pfit & ASLE_PFIT_VALID))
192 return ASLE_PFIT_FAILED;
196 void intel_opregion_asle_intr(struct drm_device *dev)
198 struct drm_i915_private *dev_priv = dev->dev_private;
199 struct opregion_asle *asle = dev_priv->opregion.asle;
206 asle_req = asle->aslc & ASLE_REQ_MSK;
209 DRM_DEBUG_DRIVER("non asle set request??\n");
213 if (asle_req & ASLE_SET_ALS_ILLUM)
214 asle_stat |= asle_set_als_illum(dev, asle->alsi);
216 if (asle_req & ASLE_SET_BACKLIGHT)
217 asle_stat |= asle_set_backlight(dev, asle->bclp);
219 if (asle_req & ASLE_SET_PFIT)
220 asle_stat |= asle_set_pfit(dev, asle->pfit);
222 if (asle_req & ASLE_SET_PWM_FREQ)
223 asle_stat |= asle_set_pwm_freq(dev, asle->pfmb);
225 asle->aslc = asle_stat;
228 /* Only present on Ironlake+ */
229 void intel_opregion_gse_intr(struct drm_device *dev)
231 struct drm_i915_private *dev_priv = dev->dev_private;
232 struct opregion_asle *asle = dev_priv->opregion.asle;
239 asle_req = asle->aslc & ASLE_REQ_MSK;
242 DRM_DEBUG_DRIVER("non asle set request??\n");
246 if (asle_req & ASLE_SET_ALS_ILLUM) {
247 DRM_DEBUG_DRIVER("Illum is not supported\n");
248 asle_stat |= ASLE_ALS_ILLUM_FAILED;
251 if (asle_req & ASLE_SET_BACKLIGHT)
252 asle_stat |= asle_set_backlight(dev, asle->bclp);
254 if (asle_req & ASLE_SET_PFIT) {
255 DRM_DEBUG_DRIVER("Pfit is not supported\n");
256 asle_stat |= ASLE_PFIT_FAILED;
259 if (asle_req & ASLE_SET_PWM_FREQ) {
260 DRM_DEBUG_DRIVER("PWM freq is not supported\n");
261 asle_stat |= ASLE_PWM_FREQ_FAILED;
264 asle->aslc = asle_stat;
266 #define ASLE_ALS_EN (1<<0)
267 #define ASLE_BLC_EN (1<<1)
268 #define ASLE_PFIT_EN (1<<2)
269 #define ASLE_PFMB_EN (1<<3)
271 void intel_opregion_enable_asle(struct drm_device *dev)
273 struct drm_i915_private *dev_priv = dev->dev_private;
274 struct opregion_asle *asle = dev_priv->opregion.asle;
278 intel_enable_asle(dev);
280 asle->tche = ASLE_ALS_EN | ASLE_BLC_EN | ASLE_PFIT_EN |
286 #define ACPI_EV_DISPLAY_SWITCH (1<<0)
287 #define ACPI_EV_LID (1<<1)
288 #define ACPI_EV_DOCK (1<<2)
290 static struct intel_opregion *system_opregion;
292 static int intel_opregion_video_event(struct notifier_block *nb,
293 unsigned long val, void *data)
295 /* The only video events relevant to opregion are 0x80. These indicate
296 either a docking event, lid switch or display switch request. In
297 Linux, these are handled by the dock, button and video drivers.
298 We might want to fix the video driver to be opregion-aware in
299 future, but right now we just indicate to the firmware that the
300 request has been handled */
302 struct opregion_acpi *acpi;
304 if (!system_opregion)
307 acpi = system_opregion->acpi;
313 static struct notifier_block intel_opregion_notifier = {
314 .notifier_call = intel_opregion_video_event,
318 * Initialise the DIDL field in opregion. This passes a list of devices to
319 * the firmware. Values are defined by section B.4.2 of the ACPI specification
323 static void intel_didl_outputs(struct drm_device *dev)
325 struct drm_i915_private *dev_priv = dev->dev_private;
326 struct intel_opregion *opregion = &dev_priv->opregion;
327 struct drm_connector *connector;
329 struct acpi_device *acpi_dev, *acpi_cdev, *acpi_video_bus = NULL;
330 unsigned long long device_id;
334 handle = DEVICE_ACPI_HANDLE(&dev->pdev->dev);
335 if (!handle || ACPI_FAILURE(acpi_bus_get_device(handle, &acpi_dev)))
338 if (acpi_is_video_device(acpi_dev))
339 acpi_video_bus = acpi_dev;
341 list_for_each_entry(acpi_cdev, &acpi_dev->children, node) {
342 if (acpi_is_video_device(acpi_cdev)) {
343 acpi_video_bus = acpi_cdev;
349 if (!acpi_video_bus) {
350 printk(KERN_WARNING "No ACPI video bus found\n");
354 list_for_each_entry(acpi_cdev, &acpi_video_bus->children, node) {
356 dev_printk (KERN_ERR, &dev->pdev->dev,
357 "More than 8 outputs detected\n");
361 acpi_evaluate_integer(acpi_cdev->handle, "_ADR",
363 if (ACPI_SUCCESS(status)) {
366 opregion->acpi->didl[i] = (u32)(device_id & 0x0f0f);
372 /* If fewer than 8 outputs, the list must be null terminated */
374 opregion->acpi->didl[i] = 0;
379 list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
380 int output_type = ACPI_OTHER_OUTPUT;
382 dev_printk (KERN_ERR, &dev->pdev->dev,
383 "More than 8 outputs detected\n");
386 switch (connector->connector_type) {
387 case DRM_MODE_CONNECTOR_VGA:
388 case DRM_MODE_CONNECTOR_DVIA:
389 output_type = ACPI_VGA_OUTPUT;
391 case DRM_MODE_CONNECTOR_Composite:
392 case DRM_MODE_CONNECTOR_SVIDEO:
393 case DRM_MODE_CONNECTOR_Component:
394 case DRM_MODE_CONNECTOR_9PinDIN:
395 output_type = ACPI_TV_OUTPUT;
397 case DRM_MODE_CONNECTOR_DVII:
398 case DRM_MODE_CONNECTOR_DVID:
399 case DRM_MODE_CONNECTOR_DisplayPort:
400 case DRM_MODE_CONNECTOR_HDMIA:
401 case DRM_MODE_CONNECTOR_HDMIB:
402 output_type = ACPI_DIGITAL_OUTPUT;
404 case DRM_MODE_CONNECTOR_LVDS:
405 output_type = ACPI_LVDS_OUTPUT;
408 opregion->acpi->didl[i] |= (1<<31) | output_type | i;
414 void intel_opregion_init(struct drm_device *dev)
416 struct drm_i915_private *dev_priv = dev->dev_private;
417 struct intel_opregion *opregion = &dev_priv->opregion;
419 if (!opregion->header)
422 if (opregion->acpi) {
423 if (drm_core_check_feature(dev, DRIVER_MODESET))
424 intel_didl_outputs(dev);
426 /* Notify BIOS we are ready to handle ACPI video ext notifs.
427 * Right now, all the events are handled by the ACPI video module.
428 * We don't actually need to do anything with them. */
429 opregion->acpi->csts = 0;
430 opregion->acpi->drdy = 1;
432 system_opregion = opregion;
433 register_acpi_notifier(&intel_opregion_notifier);
437 intel_opregion_enable_asle(dev);
440 void intel_opregion_fini(struct drm_device *dev)
442 struct drm_i915_private *dev_priv = dev->dev_private;
443 struct intel_opregion *opregion = &dev_priv->opregion;
445 if (!opregion->header)
448 if (opregion->acpi) {
449 opregion->acpi->drdy = 0;
451 system_opregion = NULL;
452 unregister_acpi_notifier(&intel_opregion_notifier);
455 /* just clear all opregion memory pointers now */
456 iounmap(opregion->header);
457 opregion->header = NULL;
458 opregion->acpi = NULL;
459 opregion->swsci = NULL;
460 opregion->asle = NULL;
461 opregion->vbt = NULL;
465 int intel_opregion_setup(struct drm_device *dev)
467 struct drm_i915_private *dev_priv = dev->dev_private;
468 struct intel_opregion *opregion = &dev_priv->opregion;
473 pci_read_config_dword(dev->pdev, PCI_ASLS, &asls);
474 DRM_DEBUG_DRIVER("graphic opregion physical addr: 0x%x\n", asls);
476 DRM_DEBUG_DRIVER("ACPI OpRegion not supported!\n");
480 base = acpi_os_ioremap(asls, OPREGION_SIZE);
484 if (memcmp(base, OPREGION_SIGNATURE, 16)) {
485 DRM_DEBUG_DRIVER("opregion signature mismatch\n");
489 opregion->header = base;
490 opregion->vbt = base + OPREGION_VBT_OFFSET;
492 mboxes = opregion->header->mboxes;
493 if (mboxes & MBOX_ACPI) {
494 DRM_DEBUG_DRIVER("Public ACPI methods supported\n");
495 opregion->acpi = base + OPREGION_ACPI_OFFSET;
498 if (mboxes & MBOX_SWSCI) {
499 DRM_DEBUG_DRIVER("SWSCI supported\n");
500 opregion->swsci = base + OPREGION_SWSCI_OFFSET;
502 if (mboxes & MBOX_ASLE) {
503 DRM_DEBUG_DRIVER("ASLE supported\n");
504 opregion->asle = base + OPREGION_ASLE_OFFSET;