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 ACPI_CLID 0x01ac /* current lid state indicator */
43 #define ACPI_CDCK 0x01b0 /* current docking state indicator */
44 #define OPREGION_SWSCI_OFFSET 0x200
45 #define OPREGION_ASLE_OFFSET 0x300
46 #define OPREGION_VBT_OFFSET 0x400
48 #define OPREGION_SIGNATURE "IntelGraphicsMem"
49 #define MBOX_ACPI (1<<0)
50 #define MBOX_SWSCI (1<<1)
51 #define MBOX_ASLE (1<<2)
53 struct opregion_header
{
62 } __attribute__((packed
));
64 /* OpRegion mailbox #1: public ACPI methods */
65 struct opregion_acpi
{
66 u32 drdy
; /* driver readiness */
67 u32 csts
; /* notification status */
68 u32 cevt
; /* current event */
70 u32 didl
[8]; /* supported display devices ID list */
71 u32 cpdl
[8]; /* currently presented display list */
72 u32 cadl
[8]; /* currently active display list */
73 u32 nadl
[8]; /* next active devices list */
74 u32 aslp
; /* ASL sleep time-out */
75 u32 tidx
; /* toggle table index */
76 u32 chpd
; /* current hotplug enable indicator */
77 u32 clid
; /* current lid state*/
78 u32 cdck
; /* current docking state */
79 u32 sxsw
; /* Sx state resume */
80 u32 evts
; /* ASL supported events */
81 u32 cnot
; /* current OS notification */
82 u32 nrdy
; /* driver status */
84 } __attribute__((packed
));
86 /* OpRegion mailbox #2: SWSCI */
87 struct opregion_swsci
{
88 u32 scic
; /* SWSCI command|status|data */
89 u32 parm
; /* command parameters */
90 u32 dslp
; /* driver sleep time-out */
92 } __attribute__((packed
));
94 /* OpRegion mailbox #3: ASLE */
95 struct opregion_asle
{
96 u32 ardy
; /* driver readiness */
97 u32 aslc
; /* ASLE interrupt command */
98 u32 tche
; /* technology enabled indicator */
99 u32 alsi
; /* current ALS illuminance reading */
100 u32 bclp
; /* backlight brightness to set */
101 u32 pfit
; /* panel fitting state */
102 u32 cblv
; /* current brightness level */
103 u16 bclm
[20]; /* backlight level duty cycle mapping table */
104 u32 cpfm
; /* current panel fitting mode */
105 u32 epfm
; /* enabled panel fitting modes */
106 u8 plut
[74]; /* panel LUT and identifier */
107 u32 pfmb
; /* PWM freq and min brightness */
109 } __attribute__((packed
));
111 /* ASLE irq request bits */
112 #define ASLE_SET_ALS_ILLUM (1 << 0)
113 #define ASLE_SET_BACKLIGHT (1 << 1)
114 #define ASLE_SET_PFIT (1 << 2)
115 #define ASLE_SET_PWM_FREQ (1 << 3)
116 #define ASLE_REQ_MSK 0xf
118 /* response bits of ASLE irq request */
119 #define ASLE_ALS_ILLUM_FAILED (1<<10)
120 #define ASLE_BACKLIGHT_FAILED (1<<12)
121 #define ASLE_PFIT_FAILED (1<<14)
122 #define ASLE_PWM_FREQ_FAILED (1<<16)
124 /* ASLE backlight brightness to set */
125 #define ASLE_BCLP_VALID (1<<31)
126 #define ASLE_BCLP_MSK (~(1<<31))
128 /* ASLE panel fitting request */
129 #define ASLE_PFIT_VALID (1<<31)
130 #define ASLE_PFIT_CENTER (1<<0)
131 #define ASLE_PFIT_STRETCH_TEXT (1<<1)
132 #define ASLE_PFIT_STRETCH_GFX (1<<2)
134 /* PWM frequency and minimum brightness */
135 #define ASLE_PFMB_BRIGHTNESS_MASK (0xff)
136 #define ASLE_PFMB_BRIGHTNESS_VALID (1<<8)
137 #define ASLE_PFMB_PWM_MASK (0x7ffffe00)
138 #define ASLE_PFMB_PWM_VALID (1<<31)
140 #define ASLE_CBLV_VALID (1<<31)
142 #define ACPI_OTHER_OUTPUT (0<<8)
143 #define ACPI_VGA_OUTPUT (1<<8)
144 #define ACPI_TV_OUTPUT (2<<8)
145 #define ACPI_DIGITAL_OUTPUT (3<<8)
146 #define ACPI_LVDS_OUTPUT (4<<8)
149 static u32
asle_set_backlight(struct drm_device
*dev
, u32 bclp
)
151 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
152 struct opregion_asle
*asle
= dev_priv
->opregion
.asle
;
155 if (!(bclp
& ASLE_BCLP_VALID
))
156 return ASLE_BACKLIGHT_FAILED
;
158 bclp
&= ASLE_BCLP_MSK
;
160 return ASLE_BACKLIGHT_FAILED
;
162 max
= intel_panel_get_max_backlight(dev
);
163 intel_panel_set_backlight(dev
, bclp
* max
/ 255);
164 asle
->cblv
= (bclp
*0x64)/0xff | ASLE_CBLV_VALID
;
169 static u32
asle_set_als_illum(struct drm_device
*dev
, u32 alsi
)
171 /* alsi is the current ALS reading in lux. 0 indicates below sensor
172 range, 0xffff indicates above sensor range. 1-0xfffe are valid */
176 static u32
asle_set_pwm_freq(struct drm_device
*dev
, u32 pfmb
)
178 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
179 if (pfmb
& ASLE_PFMB_PWM_VALID
) {
180 u32 blc_pwm_ctl
= I915_READ(BLC_PWM_CTL
);
181 u32 pwm
= pfmb
& ASLE_PFMB_PWM_MASK
;
182 blc_pwm_ctl
&= BACKLIGHT_DUTY_CYCLE_MASK
;
184 /* FIXME - what do we do with the PWM? */
189 static u32
asle_set_pfit(struct drm_device
*dev
, u32 pfit
)
191 /* Panel fitting is currently controlled by the X code, so this is a
192 noop until modesetting support works fully */
193 if (!(pfit
& ASLE_PFIT_VALID
))
194 return ASLE_PFIT_FAILED
;
198 void intel_opregion_asle_intr(struct drm_device
*dev
)
200 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
201 struct opregion_asle
*asle
= dev_priv
->opregion
.asle
;
208 asle_req
= asle
->aslc
& ASLE_REQ_MSK
;
211 DRM_DEBUG_DRIVER("non asle set request??\n");
215 if (asle_req
& ASLE_SET_ALS_ILLUM
)
216 asle_stat
|= asle_set_als_illum(dev
, asle
->alsi
);
218 if (asle_req
& ASLE_SET_BACKLIGHT
)
219 asle_stat
|= asle_set_backlight(dev
, asle
->bclp
);
221 if (asle_req
& ASLE_SET_PFIT
)
222 asle_stat
|= asle_set_pfit(dev
, asle
->pfit
);
224 if (asle_req
& ASLE_SET_PWM_FREQ
)
225 asle_stat
|= asle_set_pwm_freq(dev
, asle
->pfmb
);
227 asle
->aslc
= asle_stat
;
230 void intel_opregion_gse_intr(struct drm_device
*dev
)
232 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
233 struct opregion_asle
*asle
= dev_priv
->opregion
.asle
;
240 asle_req
= asle
->aslc
& ASLE_REQ_MSK
;
243 DRM_DEBUG_DRIVER("non asle set request??\n");
247 if (asle_req
& ASLE_SET_ALS_ILLUM
) {
248 DRM_DEBUG_DRIVER("Illum is not supported\n");
249 asle_stat
|= ASLE_ALS_ILLUM_FAILED
;
252 if (asle_req
& ASLE_SET_BACKLIGHT
)
253 asle_stat
|= asle_set_backlight(dev
, asle
->bclp
);
255 if (asle_req
& ASLE_SET_PFIT
) {
256 DRM_DEBUG_DRIVER("Pfit is not supported\n");
257 asle_stat
|= ASLE_PFIT_FAILED
;
260 if (asle_req
& ASLE_SET_PWM_FREQ
) {
261 DRM_DEBUG_DRIVER("PWM freq is not supported\n");
262 asle_stat
|= ASLE_PWM_FREQ_FAILED
;
265 asle
->aslc
= asle_stat
;
267 #define ASLE_ALS_EN (1<<0)
268 #define ASLE_BLC_EN (1<<1)
269 #define ASLE_PFIT_EN (1<<2)
270 #define ASLE_PFMB_EN (1<<3)
272 void intel_opregion_enable_asle(struct drm_device
*dev
)
274 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
275 struct opregion_asle
*asle
= dev_priv
->opregion
.asle
;
279 intel_enable_asle(dev
);
281 asle
->tche
= ASLE_ALS_EN
| ASLE_BLC_EN
| ASLE_PFIT_EN
|
287 #define ACPI_EV_DISPLAY_SWITCH (1<<0)
288 #define ACPI_EV_LID (1<<1)
289 #define ACPI_EV_DOCK (1<<2)
291 static struct intel_opregion
*system_opregion
;
293 static int intel_opregion_video_event(struct notifier_block
*nb
,
294 unsigned long val
, void *data
)
296 /* The only video events relevant to opregion are 0x80. These indicate
297 either a docking event, lid switch or display switch request. In
298 Linux, these are handled by the dock, button and video drivers.
301 struct opregion_acpi
*acpi
;
302 struct acpi_bus_event
*event
= data
;
305 if (strcmp(event
->device_class
, ACPI_VIDEO_CLASS
) != 0)
308 if (!system_opregion
)
311 acpi
= system_opregion
->acpi
;
313 if (event
->type
== 0x80 && !(acpi
->cevt
& 0x1))
321 static struct notifier_block intel_opregion_notifier
= {
322 .notifier_call
= intel_opregion_video_event
,
326 * Initialise the DIDL field in opregion. This passes a list of devices to
327 * the firmware. Values are defined by section B.4.2 of the ACPI specification
331 static void intel_didl_outputs(struct drm_device
*dev
)
333 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
334 struct intel_opregion
*opregion
= &dev_priv
->opregion
;
335 struct drm_connector
*connector
;
337 struct acpi_device
*acpi_dev
, *acpi_cdev
, *acpi_video_bus
= NULL
;
338 unsigned long long device_id
;
342 handle
= DEVICE_ACPI_HANDLE(&dev
->pdev
->dev
);
343 if (!handle
|| ACPI_FAILURE(acpi_bus_get_device(handle
, &acpi_dev
)))
346 if (acpi_is_video_device(acpi_dev
))
347 acpi_video_bus
= acpi_dev
;
349 list_for_each_entry(acpi_cdev
, &acpi_dev
->children
, node
) {
350 if (acpi_is_video_device(acpi_cdev
)) {
351 acpi_video_bus
= acpi_cdev
;
357 if (!acpi_video_bus
) {
358 printk(KERN_WARNING
"No ACPI video bus found\n");
362 list_for_each_entry(acpi_cdev
, &acpi_video_bus
->children
, node
) {
364 dev_printk (KERN_ERR
, &dev
->pdev
->dev
,
365 "More than 8 outputs detected\n");
369 acpi_evaluate_integer(acpi_cdev
->handle
, "_ADR",
371 if (ACPI_SUCCESS(status
)) {
374 opregion
->acpi
->didl
[i
] = (u32
)(device_id
& 0x0f0f);
380 /* If fewer than 8 outputs, the list must be null terminated */
382 opregion
->acpi
->didl
[i
] = 0;
387 list_for_each_entry(connector
, &dev
->mode_config
.connector_list
, head
) {
388 int output_type
= ACPI_OTHER_OUTPUT
;
390 dev_printk (KERN_ERR
, &dev
->pdev
->dev
,
391 "More than 8 outputs detected\n");
394 switch (connector
->connector_type
) {
395 case DRM_MODE_CONNECTOR_VGA
:
396 case DRM_MODE_CONNECTOR_DVIA
:
397 output_type
= ACPI_VGA_OUTPUT
;
399 case DRM_MODE_CONNECTOR_Composite
:
400 case DRM_MODE_CONNECTOR_SVIDEO
:
401 case DRM_MODE_CONNECTOR_Component
:
402 case DRM_MODE_CONNECTOR_9PinDIN
:
403 output_type
= ACPI_TV_OUTPUT
;
405 case DRM_MODE_CONNECTOR_DVII
:
406 case DRM_MODE_CONNECTOR_DVID
:
407 case DRM_MODE_CONNECTOR_DisplayPort
:
408 case DRM_MODE_CONNECTOR_HDMIA
:
409 case DRM_MODE_CONNECTOR_HDMIB
:
410 output_type
= ACPI_DIGITAL_OUTPUT
;
412 case DRM_MODE_CONNECTOR_LVDS
:
413 output_type
= ACPI_LVDS_OUTPUT
;
416 opregion
->acpi
->didl
[i
] |= (1<<31) | output_type
| i
;
422 void intel_opregion_init(struct drm_device
*dev
)
424 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
425 struct intel_opregion
*opregion
= &dev_priv
->opregion
;
427 if (!opregion
->header
)
430 if (opregion
->acpi
) {
431 if (drm_core_check_feature(dev
, DRIVER_MODESET
))
432 intel_didl_outputs(dev
);
434 /* Notify BIOS we are ready to handle ACPI video ext notifs.
435 * Right now, all the events are handled by the ACPI video module.
436 * We don't actually need to do anything with them. */
437 opregion
->acpi
->csts
= 0;
438 opregion
->acpi
->drdy
= 1;
440 system_opregion
= opregion
;
441 register_acpi_notifier(&intel_opregion_notifier
);
445 intel_opregion_enable_asle(dev
);
448 void intel_opregion_fini(struct drm_device
*dev
)
450 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
451 struct intel_opregion
*opregion
= &dev_priv
->opregion
;
453 if (!opregion
->header
)
456 if (opregion
->acpi
) {
457 opregion
->acpi
->drdy
= 0;
459 system_opregion
= NULL
;
460 unregister_acpi_notifier(&intel_opregion_notifier
);
463 /* just clear all opregion memory pointers now */
464 iounmap(opregion
->header
);
465 opregion
->header
= NULL
;
466 opregion
->acpi
= NULL
;
467 opregion
->swsci
= NULL
;
468 opregion
->asle
= NULL
;
469 opregion
->vbt
= NULL
;
473 int intel_opregion_setup(struct drm_device
*dev
)
475 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
476 struct intel_opregion
*opregion
= &dev_priv
->opregion
;
481 pci_read_config_dword(dev
->pdev
, PCI_ASLS
, &asls
);
482 DRM_DEBUG_DRIVER("graphic opregion physical addr: 0x%x\n", asls
);
484 DRM_DEBUG_DRIVER("ACPI OpRegion not supported!\n");
488 base
= acpi_os_ioremap(asls
, OPREGION_SIZE
);
492 if (memcmp(base
, OPREGION_SIGNATURE
, 16)) {
493 DRM_DEBUG_DRIVER("opregion signature mismatch\n");
497 opregion
->header
= base
;
498 opregion
->vbt
= base
+ OPREGION_VBT_OFFSET
;
500 opregion
->lid_state
= base
+ ACPI_CLID
;
502 mboxes
= opregion
->header
->mboxes
;
503 if (mboxes
& MBOX_ACPI
) {
504 DRM_DEBUG_DRIVER("Public ACPI methods supported\n");
505 opregion
->acpi
= base
+ OPREGION_ACPI_OFFSET
;
508 if (mboxes
& MBOX_SWSCI
) {
509 DRM_DEBUG_DRIVER("SWSCI supported\n");
510 opregion
->swsci
= base
+ OPREGION_SWSCI_OFFSET
;
512 if (mboxes
& MBOX_ASLE
) {
513 DRM_DEBUG_DRIVER("ASLE supported\n");
514 opregion
->asle
= base
+ OPREGION_ASLE_OFFSET
;