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 /* Only present on Ironlake+ */
231 void intel_opregion_gse_intr(struct drm_device
*dev
)
233 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
234 struct opregion_asle
*asle
= dev_priv
->opregion
.asle
;
241 asle_req
= asle
->aslc
& ASLE_REQ_MSK
;
244 DRM_DEBUG_DRIVER("non asle set request??\n");
248 if (asle_req
& ASLE_SET_ALS_ILLUM
) {
249 DRM_DEBUG_DRIVER("Illum is not supported\n");
250 asle_stat
|= ASLE_ALS_ILLUM_FAILED
;
253 if (asle_req
& ASLE_SET_BACKLIGHT
)
254 asle_stat
|= asle_set_backlight(dev
, asle
->bclp
);
256 if (asle_req
& ASLE_SET_PFIT
) {
257 DRM_DEBUG_DRIVER("Pfit is not supported\n");
258 asle_stat
|= ASLE_PFIT_FAILED
;
261 if (asle_req
& ASLE_SET_PWM_FREQ
) {
262 DRM_DEBUG_DRIVER("PWM freq is not supported\n");
263 asle_stat
|= ASLE_PWM_FREQ_FAILED
;
266 asle
->aslc
= asle_stat
;
268 #define ASLE_ALS_EN (1<<0)
269 #define ASLE_BLC_EN (1<<1)
270 #define ASLE_PFIT_EN (1<<2)
271 #define ASLE_PFMB_EN (1<<3)
273 void intel_opregion_enable_asle(struct drm_device
*dev
)
275 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
276 struct opregion_asle
*asle
= dev_priv
->opregion
.asle
;
280 intel_enable_asle(dev
);
282 asle
->tche
= ASLE_ALS_EN
| ASLE_BLC_EN
| ASLE_PFIT_EN
|
288 #define ACPI_EV_DISPLAY_SWITCH (1<<0)
289 #define ACPI_EV_LID (1<<1)
290 #define ACPI_EV_DOCK (1<<2)
292 static struct intel_opregion
*system_opregion
;
294 static int intel_opregion_video_event(struct notifier_block
*nb
,
295 unsigned long val
, void *data
)
297 /* The only video events relevant to opregion are 0x80. These indicate
298 either a docking event, lid switch or display switch request. In
299 Linux, these are handled by the dock, button and video drivers.
300 We might want to fix the video driver to be opregion-aware in
301 future, but right now we just indicate to the firmware that the
302 request has been handled */
304 struct opregion_acpi
*acpi
;
306 if (!system_opregion
)
309 acpi
= system_opregion
->acpi
;
315 static struct notifier_block intel_opregion_notifier
= {
316 .notifier_call
= intel_opregion_video_event
,
320 * Initialise the DIDL field in opregion. This passes a list of devices to
321 * the firmware. Values are defined by section B.4.2 of the ACPI specification
325 static void intel_didl_outputs(struct drm_device
*dev
)
327 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
328 struct intel_opregion
*opregion
= &dev_priv
->opregion
;
329 struct drm_connector
*connector
;
331 struct acpi_device
*acpi_dev
, *acpi_cdev
, *acpi_video_bus
= NULL
;
332 unsigned long long device_id
;
336 handle
= DEVICE_ACPI_HANDLE(&dev
->pdev
->dev
);
337 if (!handle
|| ACPI_FAILURE(acpi_bus_get_device(handle
, &acpi_dev
)))
340 if (acpi_is_video_device(acpi_dev
))
341 acpi_video_bus
= acpi_dev
;
343 list_for_each_entry(acpi_cdev
, &acpi_dev
->children
, node
) {
344 if (acpi_is_video_device(acpi_cdev
)) {
345 acpi_video_bus
= acpi_cdev
;
351 if (!acpi_video_bus
) {
352 printk(KERN_WARNING
"No ACPI video bus found\n");
356 list_for_each_entry(acpi_cdev
, &acpi_video_bus
->children
, node
) {
358 dev_printk (KERN_ERR
, &dev
->pdev
->dev
,
359 "More than 8 outputs detected\n");
363 acpi_evaluate_integer(acpi_cdev
->handle
, "_ADR",
365 if (ACPI_SUCCESS(status
)) {
368 opregion
->acpi
->didl
[i
] = (u32
)(device_id
& 0x0f0f);
374 /* If fewer than 8 outputs, the list must be null terminated */
376 opregion
->acpi
->didl
[i
] = 0;
381 list_for_each_entry(connector
, &dev
->mode_config
.connector_list
, head
) {
382 int output_type
= ACPI_OTHER_OUTPUT
;
384 dev_printk (KERN_ERR
, &dev
->pdev
->dev
,
385 "More than 8 outputs detected\n");
388 switch (connector
->connector_type
) {
389 case DRM_MODE_CONNECTOR_VGA
:
390 case DRM_MODE_CONNECTOR_DVIA
:
391 output_type
= ACPI_VGA_OUTPUT
;
393 case DRM_MODE_CONNECTOR_Composite
:
394 case DRM_MODE_CONNECTOR_SVIDEO
:
395 case DRM_MODE_CONNECTOR_Component
:
396 case DRM_MODE_CONNECTOR_9PinDIN
:
397 output_type
= ACPI_TV_OUTPUT
;
399 case DRM_MODE_CONNECTOR_DVII
:
400 case DRM_MODE_CONNECTOR_DVID
:
401 case DRM_MODE_CONNECTOR_DisplayPort
:
402 case DRM_MODE_CONNECTOR_HDMIA
:
403 case DRM_MODE_CONNECTOR_HDMIB
:
404 output_type
= ACPI_DIGITAL_OUTPUT
;
406 case DRM_MODE_CONNECTOR_LVDS
:
407 output_type
= ACPI_LVDS_OUTPUT
;
410 opregion
->acpi
->didl
[i
] |= (1<<31) | output_type
| i
;
416 void intel_opregion_init(struct drm_device
*dev
)
418 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
419 struct intel_opregion
*opregion
= &dev_priv
->opregion
;
421 if (!opregion
->header
)
424 if (opregion
->acpi
) {
425 if (drm_core_check_feature(dev
, DRIVER_MODESET
))
426 intel_didl_outputs(dev
);
428 /* Notify BIOS we are ready to handle ACPI video ext notifs.
429 * Right now, all the events are handled by the ACPI video module.
430 * We don't actually need to do anything with them. */
431 opregion
->acpi
->csts
= 0;
432 opregion
->acpi
->drdy
= 1;
434 system_opregion
= opregion
;
435 register_acpi_notifier(&intel_opregion_notifier
);
439 intel_opregion_enable_asle(dev
);
442 void intel_opregion_fini(struct drm_device
*dev
)
444 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
445 struct intel_opregion
*opregion
= &dev_priv
->opregion
;
447 if (!opregion
->header
)
450 if (opregion
->acpi
) {
451 opregion
->acpi
->drdy
= 0;
453 system_opregion
= NULL
;
454 unregister_acpi_notifier(&intel_opregion_notifier
);
457 /* just clear all opregion memory pointers now */
458 iounmap(opregion
->header
);
459 opregion
->header
= NULL
;
460 opregion
->acpi
= NULL
;
461 opregion
->swsci
= NULL
;
462 opregion
->asle
= NULL
;
463 opregion
->vbt
= NULL
;
467 int intel_opregion_setup(struct drm_device
*dev
)
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
= acpi_os_ioremap(asls
, OPREGION_SIZE
);
486 if (memcmp(base
, OPREGION_SIGNATURE
, 16)) {
487 DRM_DEBUG_DRIVER("opregion signature mismatch\n");
491 opregion
->header
= base
;
492 opregion
->vbt
= base
+ OPREGION_VBT_OFFSET
;
494 opregion
->lid_state
= base
+ ACPI_CLID
;
496 mboxes
= opregion
->header
->mboxes
;
497 if (mboxes
& MBOX_ACPI
) {
498 DRM_DEBUG_DRIVER("Public ACPI methods supported\n");
499 opregion
->acpi
= base
+ OPREGION_ACPI_OFFSET
;
502 if (mboxes
& MBOX_SWSCI
) {
503 DRM_DEBUG_DRIVER("SWSCI supported\n");
504 opregion
->swsci
= base
+ OPREGION_SWSCI_OFFSET
;
506 if (mboxes
& MBOX_ASLE
) {
507 DRM_DEBUG_DRIVER("ASLE supported\n");
508 opregion
->asle
= base
+ OPREGION_ASLE_OFFSET
;