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 DRM_DEBUG_DRIVER("bclp = 0x%08x\n", bclp
);
159 if (!(bclp
& ASLE_BCLP_VALID
))
160 return ASLE_BACKLIGHT_FAILED
;
162 bclp
&= ASLE_BCLP_MSK
;
164 return ASLE_BACKLIGHT_FAILED
;
166 max
= intel_panel_get_max_backlight(dev
);
167 intel_panel_set_backlight(dev
, bclp
* max
/ 255);
168 iowrite32((bclp
*0x64)/0xff | ASLE_CBLV_VALID
, &asle
->cblv
);
173 static u32
asle_set_als_illum(struct drm_device
*dev
, u32 alsi
)
175 /* alsi is the current ALS reading in lux. 0 indicates below sensor
176 range, 0xffff indicates above sensor range. 1-0xfffe are valid */
180 static u32
asle_set_pwm_freq(struct drm_device
*dev
, u32 pfmb
)
182 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
183 if (pfmb
& ASLE_PFMB_PWM_VALID
) {
184 u32 blc_pwm_ctl
= I915_READ(BLC_PWM_CTL
);
185 u32 pwm
= pfmb
& ASLE_PFMB_PWM_MASK
;
186 blc_pwm_ctl
&= BACKLIGHT_DUTY_CYCLE_MASK
;
188 /* FIXME - what do we do with the PWM? */
193 static u32
asle_set_pfit(struct drm_device
*dev
, u32 pfit
)
195 /* Panel fitting is currently controlled by the X code, so this is a
196 noop until modesetting support works fully */
197 if (!(pfit
& ASLE_PFIT_VALID
))
198 return ASLE_PFIT_FAILED
;
202 void intel_opregion_asle_intr(struct drm_device
*dev
)
204 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
205 struct opregion_asle __iomem
*asle
= dev_priv
->opregion
.asle
;
212 asle_req
= ioread32(&asle
->aslc
) & ASLE_REQ_MSK
;
215 DRM_DEBUG_DRIVER("non asle set request??\n");
219 if (asle_req
& ASLE_SET_ALS_ILLUM
)
220 asle_stat
|= asle_set_als_illum(dev
, ioread32(&asle
->alsi
));
222 if (asle_req
& ASLE_SET_BACKLIGHT
)
223 asle_stat
|= asle_set_backlight(dev
, ioread32(&asle
->bclp
));
225 if (asle_req
& ASLE_SET_PFIT
)
226 asle_stat
|= asle_set_pfit(dev
, ioread32(&asle
->pfit
));
228 if (asle_req
& ASLE_SET_PWM_FREQ
)
229 asle_stat
|= asle_set_pwm_freq(dev
, ioread32(&asle
->pfmb
));
231 iowrite32(asle_stat
, &asle
->aslc
);
234 void intel_opregion_gse_intr(struct drm_device
*dev
)
236 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
237 struct opregion_asle __iomem
*asle
= dev_priv
->opregion
.asle
;
244 asle_req
= ioread32(&asle
->aslc
) & ASLE_REQ_MSK
;
247 DRM_DEBUG_DRIVER("non asle set request??\n");
251 if (asle_req
& ASLE_SET_ALS_ILLUM
) {
252 DRM_DEBUG_DRIVER("Illum is not supported\n");
253 asle_stat
|= ASLE_ALS_ILLUM_FAILED
;
256 if (asle_req
& ASLE_SET_BACKLIGHT
)
257 asle_stat
|= asle_set_backlight(dev
, ioread32(&asle
->bclp
));
259 if (asle_req
& ASLE_SET_PFIT
) {
260 DRM_DEBUG_DRIVER("Pfit is not supported\n");
261 asle_stat
|= ASLE_PFIT_FAILED
;
264 if (asle_req
& ASLE_SET_PWM_FREQ
) {
265 DRM_DEBUG_DRIVER("PWM freq is not supported\n");
266 asle_stat
|= ASLE_PWM_FREQ_FAILED
;
269 iowrite32(asle_stat
, &asle
->aslc
);
271 #define ASLE_ALS_EN (1<<0)
272 #define ASLE_BLC_EN (1<<1)
273 #define ASLE_PFIT_EN (1<<2)
274 #define ASLE_PFMB_EN (1<<3)
276 void intel_opregion_enable_asle(struct drm_device
*dev
)
278 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
279 struct opregion_asle __iomem
*asle
= dev_priv
->opregion
.asle
;
283 intel_enable_asle(dev
);
285 iowrite32(ASLE_ALS_EN
| ASLE_BLC_EN
| ASLE_PFIT_EN
|
288 iowrite32(1, &asle
->ardy
);
292 #define ACPI_EV_DISPLAY_SWITCH (1<<0)
293 #define ACPI_EV_LID (1<<1)
294 #define ACPI_EV_DOCK (1<<2)
296 static struct intel_opregion
*system_opregion
;
298 static int intel_opregion_video_event(struct notifier_block
*nb
,
299 unsigned long val
, void *data
)
301 /* The only video events relevant to opregion are 0x80. These indicate
302 either a docking event, lid switch or display switch request. In
303 Linux, these are handled by the dock, button and video drivers.
306 struct opregion_acpi __iomem
*acpi
;
307 struct acpi_bus_event
*event
= data
;
310 if (strcmp(event
->device_class
, ACPI_VIDEO_CLASS
) != 0)
313 if (!system_opregion
)
316 acpi
= system_opregion
->acpi
;
318 if (event
->type
== 0x80 &&
319 (ioread32(&acpi
->cevt
) & 1) == 0)
322 iowrite32(0, &acpi
->csts
);
327 static struct notifier_block intel_opregion_notifier
= {
328 .notifier_call
= intel_opregion_video_event
,
332 * Initialise the DIDL field in opregion. This passes a list of devices to
333 * the firmware. Values are defined by section B.4.2 of the ACPI specification
337 static void intel_didl_outputs(struct drm_device
*dev
)
339 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
340 struct intel_opregion
*opregion
= &dev_priv
->opregion
;
341 struct drm_connector
*connector
;
343 struct acpi_device
*acpi_dev
, *acpi_cdev
, *acpi_video_bus
= NULL
;
344 unsigned long long device_id
;
349 handle
= DEVICE_ACPI_HANDLE(&dev
->pdev
->dev
);
350 if (!handle
|| acpi_bus_get_device(handle
, &acpi_dev
))
353 if (acpi_is_video_device(acpi_dev
))
354 acpi_video_bus
= acpi_dev
;
356 list_for_each_entry(acpi_cdev
, &acpi_dev
->children
, node
) {
357 if (acpi_is_video_device(acpi_cdev
)) {
358 acpi_video_bus
= acpi_cdev
;
364 if (!acpi_video_bus
) {
365 pr_warn("No ACPI video bus found\n");
369 list_for_each_entry(acpi_cdev
, &acpi_video_bus
->children
, node
) {
371 dev_printk(KERN_ERR
, &dev
->pdev
->dev
,
372 "More than 8 outputs detected\n");
376 acpi_evaluate_integer(acpi_cdev
->handle
, "_ADR",
378 if (ACPI_SUCCESS(status
)) {
381 iowrite32((u32
)(device_id
& 0x0f0f),
382 &opregion
->acpi
->didl
[i
]);
388 /* If fewer than 8 outputs, the list must be null terminated */
390 iowrite32(0, &opregion
->acpi
->didl
[i
]);
395 list_for_each_entry(connector
, &dev
->mode_config
.connector_list
, head
) {
396 int output_type
= ACPI_OTHER_OUTPUT
;
398 dev_printk(KERN_ERR
, &dev
->pdev
->dev
,
399 "More than 8 outputs detected\n");
402 switch (connector
->connector_type
) {
403 case DRM_MODE_CONNECTOR_VGA
:
404 case DRM_MODE_CONNECTOR_DVIA
:
405 output_type
= ACPI_VGA_OUTPUT
;
407 case DRM_MODE_CONNECTOR_Composite
:
408 case DRM_MODE_CONNECTOR_SVIDEO
:
409 case DRM_MODE_CONNECTOR_Component
:
410 case DRM_MODE_CONNECTOR_9PinDIN
:
411 output_type
= ACPI_TV_OUTPUT
;
413 case DRM_MODE_CONNECTOR_DVII
:
414 case DRM_MODE_CONNECTOR_DVID
:
415 case DRM_MODE_CONNECTOR_DisplayPort
:
416 case DRM_MODE_CONNECTOR_HDMIA
:
417 case DRM_MODE_CONNECTOR_HDMIB
:
418 output_type
= ACPI_DIGITAL_OUTPUT
;
420 case DRM_MODE_CONNECTOR_LVDS
:
421 output_type
= ACPI_LVDS_OUTPUT
;
424 temp
= ioread32(&opregion
->acpi
->didl
[i
]);
425 iowrite32(temp
| (1<<31) | output_type
| i
,
426 &opregion
->acpi
->didl
[i
]);
432 static void intel_setup_cadls(struct drm_device
*dev
)
434 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
435 struct intel_opregion
*opregion
= &dev_priv
->opregion
;
439 /* Initialize the CADL field by duplicating the DIDL values.
440 * Technically, this is not always correct as display outputs may exist,
441 * but not active. This initialization is necessary for some Clevo
442 * laptops that check this field before processing the brightness and
443 * display switching hotkeys. Just like DIDL, CADL is NULL-terminated if
444 * there are less than eight devices. */
446 disp_id
= ioread32(&opregion
->acpi
->didl
[i
]);
447 iowrite32(disp_id
, &opregion
->acpi
->cadl
[i
]);
448 } while (++i
< 8 && disp_id
!= 0);
451 void intel_opregion_init(struct drm_device
*dev
)
453 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
454 struct intel_opregion
*opregion
= &dev_priv
->opregion
;
456 if (!opregion
->header
)
459 if (opregion
->acpi
) {
460 if (drm_core_check_feature(dev
, DRIVER_MODESET
)) {
461 intel_didl_outputs(dev
);
462 intel_setup_cadls(dev
);
465 /* Notify BIOS we are ready to handle ACPI video ext notifs.
466 * Right now, all the events are handled by the ACPI video module.
467 * We don't actually need to do anything with them. */
468 iowrite32(0, &opregion
->acpi
->csts
);
469 iowrite32(1, &opregion
->acpi
->drdy
);
471 system_opregion
= opregion
;
472 register_acpi_notifier(&intel_opregion_notifier
);
476 intel_opregion_enable_asle(dev
);
479 void intel_opregion_fini(struct drm_device
*dev
)
481 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
482 struct intel_opregion
*opregion
= &dev_priv
->opregion
;
484 if (!opregion
->header
)
487 if (opregion
->acpi
) {
488 iowrite32(0, &opregion
->acpi
->drdy
);
490 system_opregion
= NULL
;
491 unregister_acpi_notifier(&intel_opregion_notifier
);
494 /* just clear all opregion memory pointers now */
495 iounmap(opregion
->header
);
496 opregion
->header
= NULL
;
497 opregion
->acpi
= NULL
;
498 opregion
->swsci
= NULL
;
499 opregion
->asle
= NULL
;
500 opregion
->vbt
= NULL
;
504 int intel_opregion_setup(struct drm_device
*dev
)
506 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
507 struct intel_opregion
*opregion
= &dev_priv
->opregion
;
510 char buf
[sizeof(OPREGION_SIGNATURE
)];
513 pci_read_config_dword(dev
->pdev
, PCI_ASLS
, &asls
);
514 DRM_DEBUG_DRIVER("graphic opregion physical addr: 0x%x\n", asls
);
516 DRM_DEBUG_DRIVER("ACPI OpRegion not supported!\n");
520 base
= acpi_os_ioremap(asls
, OPREGION_SIZE
);
524 memcpy_fromio(buf
, base
, sizeof(buf
));
526 if (memcmp(buf
, OPREGION_SIGNATURE
, 16)) {
527 DRM_DEBUG_DRIVER("opregion signature mismatch\n");
531 opregion
->header
= base
;
532 opregion
->vbt
= base
+ OPREGION_VBT_OFFSET
;
534 opregion
->lid_state
= base
+ ACPI_CLID
;
536 mboxes
= ioread32(&opregion
->header
->mboxes
);
537 if (mboxes
& MBOX_ACPI
) {
538 DRM_DEBUG_DRIVER("Public ACPI methods supported\n");
539 opregion
->acpi
= base
+ OPREGION_ACPI_OFFSET
;
542 if (mboxes
& MBOX_SWSCI
) {
543 DRM_DEBUG_DRIVER("SWSCI supported\n");
544 opregion
->swsci
= base
+ OPREGION_SWSCI_OFFSET
;
546 if (mboxes
& MBOX_ASLE
) {
547 DRM_DEBUG_DRIVER("ASLE supported\n");
548 opregion
->asle
= base
+ OPREGION_ASLE_OFFSET
;