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/dmi.h>
30 #include <linux/firmware.h>
31 #include <acpi/video.h>
33 #include <drm/drm_edid.h>
36 #include "intel_acpi.h"
37 #include "intel_backlight.h"
38 #include "intel_display_types.h"
39 #include "intel_opregion.h"
40 #include "intel_pci_config.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
49 #define OPREGION_ASLE_EXT_OFFSET 0x1C00
51 #define OPREGION_SIGNATURE "IntelGraphicsMem"
52 #define MBOX_ACPI BIT(0) /* Mailbox #1 */
53 #define MBOX_SWSCI BIT(1) /* Mailbox #2 (obsolete from v2.x) */
54 #define MBOX_ASLE BIT(2) /* Mailbox #3 */
55 #define MBOX_ASLE_EXT BIT(4) /* Mailbox #5 */
56 #define MBOX_BACKLIGHT BIT(5) /* Mailbox #2 (valid from v3.x) */
58 #define PCON_HEADLESS_SKU BIT(13)
60 struct opregion_header
{
79 /* OpRegion mailbox #1: public ACPI methods */
80 struct opregion_acpi
{
81 u32 drdy
; /* driver readiness */
82 u32 csts
; /* notification status */
83 u32 cevt
; /* current event */
85 u32 didl
[8]; /* supported display devices ID list */
86 u32 cpdl
[8]; /* currently presented display list */
87 u32 cadl
[8]; /* currently active display list */
88 u32 nadl
[8]; /* next active devices list */
89 u32 aslp
; /* ASL sleep time-out */
90 u32 tidx
; /* toggle table index */
91 u32 chpd
; /* current hotplug enable indicator */
92 u32 clid
; /* current lid state*/
93 u32 cdck
; /* current docking state */
94 u32 sxsw
; /* Sx state resume */
95 u32 evts
; /* ASL supported events */
96 u32 cnot
; /* current OS notification */
97 u32 nrdy
; /* driver status */
98 u32 did2
[7]; /* extended supported display devices ID list */
99 u32 cpd2
[7]; /* extended attached display devices list */
103 /* OpRegion mailbox #2: SWSCI */
104 struct opregion_swsci
{
105 u32 scic
; /* SWSCI command|status|data */
106 u32 parm
; /* command parameters */
107 u32 dslp
; /* driver sleep time-out */
111 /* OpRegion mailbox #3: ASLE */
112 struct opregion_asle
{
113 u32 ardy
; /* driver readiness */
114 u32 aslc
; /* ASLE interrupt command */
115 u32 tche
; /* technology enabled indicator */
116 u32 alsi
; /* current ALS illuminance reading */
117 u32 bclp
; /* backlight brightness to set */
118 u32 pfit
; /* panel fitting state */
119 u32 cblv
; /* current brightness level */
120 u16 bclm
[20]; /* backlight level duty cycle mapping table */
121 u32 cpfm
; /* current panel fitting mode */
122 u32 epfm
; /* enabled panel fitting modes */
123 u8 plut
[74]; /* panel LUT and identifier */
124 u32 pfmb
; /* PWM freq and min brightness */
125 u32 cddv
; /* color correction default values */
126 u32 pcft
; /* power conservation features */
127 u32 srot
; /* supported rotation angles */
128 u32 iuer
; /* IUER events */
132 u64 rvda
; /* Physical (2.0) or relative from opregion (2.1+)
133 * address of raw VBT data. */
134 u32 rvds
; /* Size of raw vbt data */
138 /* OpRegion mailbox #5: ASLE ext */
139 struct opregion_asle_ext
{
140 u32 phed
; /* Panel Header */
141 u8 bddc
[256]; /* Panel EDID */
145 /* Driver readiness indicator */
146 #define ASLE_ARDY_READY (1 << 0)
147 #define ASLE_ARDY_NOT_READY (0 << 0)
149 /* ASLE Interrupt Command (ASLC) bits */
150 #define ASLC_SET_ALS_ILLUM (1 << 0)
151 #define ASLC_SET_BACKLIGHT (1 << 1)
152 #define ASLC_SET_PFIT (1 << 2)
153 #define ASLC_SET_PWM_FREQ (1 << 3)
154 #define ASLC_SUPPORTED_ROTATION_ANGLES (1 << 4)
155 #define ASLC_BUTTON_ARRAY (1 << 5)
156 #define ASLC_CONVERTIBLE_INDICATOR (1 << 6)
157 #define ASLC_DOCKING_INDICATOR (1 << 7)
158 #define ASLC_ISCT_STATE_CHANGE (1 << 8)
159 #define ASLC_REQ_MSK 0x1ff
161 #define ASLC_ALS_ILLUM_FAILED (1 << 10)
162 #define ASLC_BACKLIGHT_FAILED (1 << 12)
163 #define ASLC_PFIT_FAILED (1 << 14)
164 #define ASLC_PWM_FREQ_FAILED (1 << 16)
165 #define ASLC_ROTATION_ANGLES_FAILED (1 << 18)
166 #define ASLC_BUTTON_ARRAY_FAILED (1 << 20)
167 #define ASLC_CONVERTIBLE_FAILED (1 << 22)
168 #define ASLC_DOCKING_FAILED (1 << 24)
169 #define ASLC_ISCT_STATE_FAILED (1 << 26)
171 /* Technology enabled indicator */
172 #define ASLE_TCHE_ALS_EN (1 << 0)
173 #define ASLE_TCHE_BLC_EN (1 << 1)
174 #define ASLE_TCHE_PFIT_EN (1 << 2)
175 #define ASLE_TCHE_PFMB_EN (1 << 3)
177 /* ASLE backlight brightness to set */
178 #define ASLE_BCLP_VALID (1<<31)
179 #define ASLE_BCLP_MSK (~(1<<31))
181 /* ASLE panel fitting request */
182 #define ASLE_PFIT_VALID (1<<31)
183 #define ASLE_PFIT_CENTER (1<<0)
184 #define ASLE_PFIT_STRETCH_TEXT (1<<1)
185 #define ASLE_PFIT_STRETCH_GFX (1<<2)
187 /* PWM frequency and minimum brightness */
188 #define ASLE_PFMB_BRIGHTNESS_MASK (0xff)
189 #define ASLE_PFMB_BRIGHTNESS_VALID (1<<8)
190 #define ASLE_PFMB_PWM_MASK (0x7ffffe00)
191 #define ASLE_PFMB_PWM_VALID (1<<31)
193 #define ASLE_CBLV_VALID (1<<31)
196 #define ASLE_IUER_DOCKING (1 << 7)
197 #define ASLE_IUER_CONVERTIBLE (1 << 6)
198 #define ASLE_IUER_ROTATION_LOCK_BTN (1 << 4)
199 #define ASLE_IUER_VOLUME_DOWN_BTN (1 << 3)
200 #define ASLE_IUER_VOLUME_UP_BTN (1 << 2)
201 #define ASLE_IUER_WINDOWS_BTN (1 << 1)
202 #define ASLE_IUER_POWER_BTN (1 << 0)
204 #define ASLE_PHED_EDID_VALID_MASK 0x3
206 /* Software System Control Interrupt (SWSCI) */
207 #define SWSCI_SCIC_INDICATOR (1 << 0)
208 #define SWSCI_SCIC_MAIN_FUNCTION_SHIFT 1
209 #define SWSCI_SCIC_MAIN_FUNCTION_MASK (0xf << 1)
210 #define SWSCI_SCIC_SUB_FUNCTION_SHIFT 8
211 #define SWSCI_SCIC_SUB_FUNCTION_MASK (0xff << 8)
212 #define SWSCI_SCIC_EXIT_PARAMETER_SHIFT 8
213 #define SWSCI_SCIC_EXIT_PARAMETER_MASK (0xff << 8)
214 #define SWSCI_SCIC_EXIT_STATUS_SHIFT 5
215 #define SWSCI_SCIC_EXIT_STATUS_MASK (7 << 5)
216 #define SWSCI_SCIC_EXIT_STATUS_SUCCESS 1
218 #define SWSCI_FUNCTION_CODE(main, sub) \
219 ((main) << SWSCI_SCIC_MAIN_FUNCTION_SHIFT | \
220 (sub) << SWSCI_SCIC_SUB_FUNCTION_SHIFT)
222 /* SWSCI: Get BIOS Data (GBDA) */
224 #define SWSCI_GBDA_SUPPORTED_CALLS SWSCI_FUNCTION_CODE(SWSCI_GBDA, 0)
225 #define SWSCI_GBDA_REQUESTED_CALLBACKS SWSCI_FUNCTION_CODE(SWSCI_GBDA, 1)
226 #define SWSCI_GBDA_BOOT_DISPLAY_PREF SWSCI_FUNCTION_CODE(SWSCI_GBDA, 4)
227 #define SWSCI_GBDA_PANEL_DETAILS SWSCI_FUNCTION_CODE(SWSCI_GBDA, 5)
228 #define SWSCI_GBDA_TV_STANDARD SWSCI_FUNCTION_CODE(SWSCI_GBDA, 6)
229 #define SWSCI_GBDA_INTERNAL_GRAPHICS SWSCI_FUNCTION_CODE(SWSCI_GBDA, 7)
230 #define SWSCI_GBDA_SPREAD_SPECTRUM SWSCI_FUNCTION_CODE(SWSCI_GBDA, 10)
232 /* SWSCI: System BIOS Callbacks (SBCB) */
234 #define SWSCI_SBCB_SUPPORTED_CALLBACKS SWSCI_FUNCTION_CODE(SWSCI_SBCB, 0)
235 #define SWSCI_SBCB_INIT_COMPLETION SWSCI_FUNCTION_CODE(SWSCI_SBCB, 1)
236 #define SWSCI_SBCB_PRE_HIRES_SET_MODE SWSCI_FUNCTION_CODE(SWSCI_SBCB, 3)
237 #define SWSCI_SBCB_POST_HIRES_SET_MODE SWSCI_FUNCTION_CODE(SWSCI_SBCB, 4)
238 #define SWSCI_SBCB_DISPLAY_SWITCH SWSCI_FUNCTION_CODE(SWSCI_SBCB, 5)
239 #define SWSCI_SBCB_SET_TV_FORMAT SWSCI_FUNCTION_CODE(SWSCI_SBCB, 6)
240 #define SWSCI_SBCB_ADAPTER_POWER_STATE SWSCI_FUNCTION_CODE(SWSCI_SBCB, 7)
241 #define SWSCI_SBCB_DISPLAY_POWER_STATE SWSCI_FUNCTION_CODE(SWSCI_SBCB, 8)
242 #define SWSCI_SBCB_SET_BOOT_DISPLAY SWSCI_FUNCTION_CODE(SWSCI_SBCB, 9)
243 #define SWSCI_SBCB_SET_PANEL_DETAILS SWSCI_FUNCTION_CODE(SWSCI_SBCB, 10)
244 #define SWSCI_SBCB_SET_INTERNAL_GFX SWSCI_FUNCTION_CODE(SWSCI_SBCB, 11)
245 #define SWSCI_SBCB_POST_HIRES_TO_DOS_FS SWSCI_FUNCTION_CODE(SWSCI_SBCB, 16)
246 #define SWSCI_SBCB_SUSPEND_RESUME SWSCI_FUNCTION_CODE(SWSCI_SBCB, 17)
247 #define SWSCI_SBCB_SET_SPREAD_SPECTRUM SWSCI_FUNCTION_CODE(SWSCI_SBCB, 18)
248 #define SWSCI_SBCB_POST_VBE_PM SWSCI_FUNCTION_CODE(SWSCI_SBCB, 19)
249 #define SWSCI_SBCB_ENABLE_DISABLE_AUDIO SWSCI_FUNCTION_CODE(SWSCI_SBCB, 21)
251 #define MAX_DSLP 1500
253 #define OPREGION_SIZE (8 * 1024)
255 struct intel_opregion
{
256 struct drm_i915_private
*i915
;
258 struct opregion_header
*header
;
259 struct opregion_acpi
*acpi
;
260 struct opregion_swsci
*swsci
;
261 u32 swsci_gbda_sub_functions
;
262 u32 swsci_sbcb_sub_functions
;
263 struct opregion_asle
*asle
;
264 struct opregion_asle_ext
*asle_ext
;
269 struct work_struct asle_work
;
270 struct notifier_block acpi_notifier
;
273 static int check_swsci_function(struct drm_i915_private
*i915
, u32 function
)
275 struct intel_opregion
*opregion
= i915
->display
.opregion
;
276 struct opregion_swsci
*swsci
;
277 u32 main_function
, sub_function
;
282 swsci
= opregion
->swsci
;
286 main_function
= (function
& SWSCI_SCIC_MAIN_FUNCTION_MASK
) >>
287 SWSCI_SCIC_MAIN_FUNCTION_SHIFT
;
288 sub_function
= (function
& SWSCI_SCIC_SUB_FUNCTION_MASK
) >>
289 SWSCI_SCIC_SUB_FUNCTION_SHIFT
;
291 /* Check if we can call the function. See swsci_setup for details. */
292 if (main_function
== SWSCI_SBCB
) {
293 if ((opregion
->swsci_sbcb_sub_functions
&
294 (1 << sub_function
)) == 0)
296 } else if (main_function
== SWSCI_GBDA
) {
297 if ((opregion
->swsci_gbda_sub_functions
&
298 (1 << sub_function
)) == 0)
305 static int swsci(struct drm_i915_private
*dev_priv
,
306 u32 function
, u32 parm
, u32
*parm_out
)
308 struct opregion_swsci
*swsci
;
309 struct pci_dev
*pdev
= to_pci_dev(dev_priv
->drm
.dev
);
314 ret
= check_swsci_function(dev_priv
, function
);
318 swsci
= dev_priv
->display
.opregion
->swsci
;
320 /* Driver sleep timeout in ms. */
323 /* The spec says 2ms should be the default, but it's too small
324 * for some machines. */
326 } else if (dslp
> MAX_DSLP
) {
327 /* Hey bios, trust must be earned. */
328 DRM_INFO_ONCE("ACPI BIOS requests an excessive sleep of %u ms, "
329 "using %u ms instead\n", dslp
, MAX_DSLP
);
333 /* The spec tells us to do this, but we are the only user... */
335 if (scic
& SWSCI_SCIC_INDICATOR
) {
336 drm_dbg(&dev_priv
->drm
, "SWSCI request already in progress\n");
340 scic
= function
| SWSCI_SCIC_INDICATOR
;
345 /* Ensure SCI event is selected and event trigger is cleared. */
346 pci_read_config_word(pdev
, SWSCI
, &swsci_val
);
347 if (!(swsci_val
& SWSCI_SCISEL
) || (swsci_val
& SWSCI_GSSCIE
)) {
348 swsci_val
|= SWSCI_SCISEL
;
349 swsci_val
&= ~SWSCI_GSSCIE
;
350 pci_write_config_word(pdev
, SWSCI
, swsci_val
);
353 /* Use event trigger to tell bios to check the mail. */
354 swsci_val
|= SWSCI_GSSCIE
;
355 pci_write_config_word(pdev
, SWSCI
, swsci_val
);
357 /* Poll for the result. */
358 #define C (((scic = swsci->scic) & SWSCI_SCIC_INDICATOR) == 0)
359 if (wait_for(C
, dslp
)) {
360 drm_dbg(&dev_priv
->drm
, "SWSCI request timed out\n");
364 scic
= (scic
& SWSCI_SCIC_EXIT_STATUS_MASK
) >>
365 SWSCI_SCIC_EXIT_STATUS_SHIFT
;
367 /* Note: scic == 0 is an error! */
368 if (scic
!= SWSCI_SCIC_EXIT_STATUS_SUCCESS
) {
369 drm_dbg(&dev_priv
->drm
, "SWSCI request error %u\n", scic
);
374 *parm_out
= swsci
->parm
;
381 #define DISPLAY_TYPE_CRT 0
382 #define DISPLAY_TYPE_TV 1
383 #define DISPLAY_TYPE_EXTERNAL_FLAT_PANEL 2
384 #define DISPLAY_TYPE_INTERNAL_FLAT_PANEL 3
386 int intel_opregion_notify_encoder(struct intel_encoder
*intel_encoder
,
389 struct drm_i915_private
*dev_priv
= to_i915(intel_encoder
->base
.dev
);
395 /* don't care about old stuff for now */
396 if (!HAS_DDI(dev_priv
))
399 /* Avoid port out of bounds checks if SWSCI isn't there. */
400 ret
= check_swsci_function(dev_priv
, SWSCI_SBCB_DISPLAY_POWER_STATE
);
404 if (intel_encoder
->type
== INTEL_OUTPUT_DSI
)
407 port
= intel_encoder
->port
;
409 if (port
== PORT_E
) {
417 * The port numbering and mapping here is bizarre. The now-obsolete
418 * swsci spec supports ports numbered [0..4]. Port E is handled as a
419 * special case, but port F and beyond are not. The functionality is
420 * supposed to be obsolete for new platforms. Just bail out if the port
421 * number is out of bounds after mapping.
424 drm_dbg_kms(&dev_priv
->drm
,
425 "[ENCODER:%d:%s] port %c (index %u) out of bounds for display power state notification\n",
426 intel_encoder
->base
.base
.id
, intel_encoder
->base
.name
,
427 port_name(intel_encoder
->port
), port
);
434 switch (intel_encoder
->type
) {
435 case INTEL_OUTPUT_ANALOG
:
436 type
= DISPLAY_TYPE_CRT
;
438 case INTEL_OUTPUT_DDI
:
439 case INTEL_OUTPUT_DP
:
440 case INTEL_OUTPUT_HDMI
:
441 case INTEL_OUTPUT_DP_MST
:
442 type
= DISPLAY_TYPE_EXTERNAL_FLAT_PANEL
;
444 case INTEL_OUTPUT_EDP
:
445 case INTEL_OUTPUT_DSI
:
446 type
= DISPLAY_TYPE_INTERNAL_FLAT_PANEL
;
449 drm_WARN_ONCE(&dev_priv
->drm
, 1,
450 "unsupported intel_encoder type %d\n",
451 intel_encoder
->type
);
455 parm
|= type
<< (16 + port
* 3);
457 return swsci(dev_priv
, SWSCI_SBCB_DISPLAY_POWER_STATE
, parm
, NULL
);
460 static const struct {
461 pci_power_t pci_power_state
;
463 } power_state_map
[] = {
468 { PCI_D3cold
, 0x04 },
471 int intel_opregion_notify_adapter(struct drm_i915_private
*dev_priv
,
476 if (!HAS_DDI(dev_priv
))
479 for (i
= 0; i
< ARRAY_SIZE(power_state_map
); i
++) {
480 if (state
== power_state_map
[i
].pci_power_state
)
481 return swsci(dev_priv
, SWSCI_SBCB_ADAPTER_POWER_STATE
,
482 power_state_map
[i
].parm
, NULL
);
488 static u32
asle_set_backlight(struct drm_i915_private
*dev_priv
, u32 bclp
)
490 struct intel_connector
*connector
;
491 struct drm_connector_list_iter conn_iter
;
492 struct opregion_asle
*asle
= dev_priv
->display
.opregion
->asle
;
494 drm_dbg(&dev_priv
->drm
, "bclp = 0x%08x\n", bclp
);
496 if (acpi_video_get_backlight_type() == acpi_backlight_native
) {
497 drm_dbg_kms(&dev_priv
->drm
,
498 "opregion backlight request ignored\n");
502 if (!(bclp
& ASLE_BCLP_VALID
))
503 return ASLC_BACKLIGHT_FAILED
;
505 bclp
&= ASLE_BCLP_MSK
;
507 return ASLC_BACKLIGHT_FAILED
;
509 drm_modeset_lock(&dev_priv
->drm
.mode_config
.connection_mutex
, NULL
);
512 * Update backlight on all connectors that support backlight (usually
515 drm_dbg_kms(&dev_priv
->drm
, "updating opregion backlight %d/255\n",
517 drm_connector_list_iter_begin(&dev_priv
->drm
, &conn_iter
);
518 for_each_intel_connector_iter(connector
, &conn_iter
)
519 intel_backlight_set_acpi(connector
->base
.state
, bclp
, 255);
520 drm_connector_list_iter_end(&conn_iter
);
521 asle
->cblv
= DIV_ROUND_UP(bclp
* 100, 255) | ASLE_CBLV_VALID
;
523 drm_modeset_unlock(&dev_priv
->drm
.mode_config
.connection_mutex
);
529 static u32
asle_set_als_illum(struct drm_i915_private
*dev_priv
, u32 alsi
)
531 /* alsi is the current ALS reading in lux. 0 indicates below sensor
532 range, 0xffff indicates above sensor range. 1-0xfffe are valid */
533 drm_dbg(&dev_priv
->drm
, "Illum is not supported\n");
534 return ASLC_ALS_ILLUM_FAILED
;
537 static u32
asle_set_pwm_freq(struct drm_i915_private
*dev_priv
, u32 pfmb
)
539 drm_dbg(&dev_priv
->drm
, "PWM freq is not supported\n");
540 return ASLC_PWM_FREQ_FAILED
;
543 static u32
asle_set_pfit(struct drm_i915_private
*dev_priv
, u32 pfit
)
545 /* Panel fitting is currently controlled by the X code, so this is a
546 noop until modesetting support works fully */
547 drm_dbg(&dev_priv
->drm
, "Pfit is not supported\n");
548 return ASLC_PFIT_FAILED
;
551 static u32
asle_set_supported_rotation_angles(struct drm_i915_private
*dev_priv
, u32 srot
)
553 drm_dbg(&dev_priv
->drm
, "SROT is not supported\n");
554 return ASLC_ROTATION_ANGLES_FAILED
;
557 static u32
asle_set_button_array(struct drm_i915_private
*dev_priv
, u32 iuer
)
560 drm_dbg(&dev_priv
->drm
,
561 "Button array event is not supported (nothing)\n");
562 if (iuer
& ASLE_IUER_ROTATION_LOCK_BTN
)
563 drm_dbg(&dev_priv
->drm
,
564 "Button array event is not supported (rotation lock)\n");
565 if (iuer
& ASLE_IUER_VOLUME_DOWN_BTN
)
566 drm_dbg(&dev_priv
->drm
,
567 "Button array event is not supported (volume down)\n");
568 if (iuer
& ASLE_IUER_VOLUME_UP_BTN
)
569 drm_dbg(&dev_priv
->drm
,
570 "Button array event is not supported (volume up)\n");
571 if (iuer
& ASLE_IUER_WINDOWS_BTN
)
572 drm_dbg(&dev_priv
->drm
,
573 "Button array event is not supported (windows)\n");
574 if (iuer
& ASLE_IUER_POWER_BTN
)
575 drm_dbg(&dev_priv
->drm
,
576 "Button array event is not supported (power)\n");
578 return ASLC_BUTTON_ARRAY_FAILED
;
581 static u32
asle_set_convertible(struct drm_i915_private
*dev_priv
, u32 iuer
)
583 if (iuer
& ASLE_IUER_CONVERTIBLE
)
584 drm_dbg(&dev_priv
->drm
,
585 "Convertible is not supported (clamshell)\n");
587 drm_dbg(&dev_priv
->drm
,
588 "Convertible is not supported (slate)\n");
590 return ASLC_CONVERTIBLE_FAILED
;
593 static u32
asle_set_docking(struct drm_i915_private
*dev_priv
, u32 iuer
)
595 if (iuer
& ASLE_IUER_DOCKING
)
596 drm_dbg(&dev_priv
->drm
, "Docking is not supported (docked)\n");
598 drm_dbg(&dev_priv
->drm
,
599 "Docking is not supported (undocked)\n");
601 return ASLC_DOCKING_FAILED
;
604 static u32
asle_isct_state(struct drm_i915_private
*dev_priv
)
606 drm_dbg(&dev_priv
->drm
, "ISCT is not supported\n");
607 return ASLC_ISCT_STATE_FAILED
;
610 static void asle_work(struct work_struct
*work
)
612 struct intel_opregion
*opregion
=
613 container_of(work
, struct intel_opregion
, asle_work
);
614 struct drm_i915_private
*dev_priv
= opregion
->i915
;
615 struct opregion_asle
*asle
= opregion
->asle
;
622 aslc_req
= asle
->aslc
;
624 if (!(aslc_req
& ASLC_REQ_MSK
)) {
625 drm_dbg(&dev_priv
->drm
,
626 "No request on ASLC interrupt 0x%08x\n", aslc_req
);
630 if (aslc_req
& ASLC_SET_ALS_ILLUM
)
631 aslc_stat
|= asle_set_als_illum(dev_priv
, asle
->alsi
);
633 if (aslc_req
& ASLC_SET_BACKLIGHT
)
634 aslc_stat
|= asle_set_backlight(dev_priv
, asle
->bclp
);
636 if (aslc_req
& ASLC_SET_PFIT
)
637 aslc_stat
|= asle_set_pfit(dev_priv
, asle
->pfit
);
639 if (aslc_req
& ASLC_SET_PWM_FREQ
)
640 aslc_stat
|= asle_set_pwm_freq(dev_priv
, asle
->pfmb
);
642 if (aslc_req
& ASLC_SUPPORTED_ROTATION_ANGLES
)
643 aslc_stat
|= asle_set_supported_rotation_angles(dev_priv
,
646 if (aslc_req
& ASLC_BUTTON_ARRAY
)
647 aslc_stat
|= asle_set_button_array(dev_priv
, asle
->iuer
);
649 if (aslc_req
& ASLC_CONVERTIBLE_INDICATOR
)
650 aslc_stat
|= asle_set_convertible(dev_priv
, asle
->iuer
);
652 if (aslc_req
& ASLC_DOCKING_INDICATOR
)
653 aslc_stat
|= asle_set_docking(dev_priv
, asle
->iuer
);
655 if (aslc_req
& ASLC_ISCT_STATE_CHANGE
)
656 aslc_stat
|= asle_isct_state(dev_priv
);
658 asle
->aslc
= aslc_stat
;
661 bool intel_opregion_asle_present(struct drm_i915_private
*i915
)
663 return i915
->display
.opregion
&& i915
->display
.opregion
->asle
;
666 void intel_opregion_asle_intr(struct drm_i915_private
*i915
)
668 struct intel_opregion
*opregion
= i915
->display
.opregion
;
670 if (opregion
&& opregion
->asle
)
671 queue_work(i915
->unordered_wq
, &opregion
->asle_work
);
674 #define ACPI_EV_DISPLAY_SWITCH (1<<0)
675 #define ACPI_EV_LID (1<<1)
676 #define ACPI_EV_DOCK (1<<2)
679 * The only video events relevant to opregion are 0x80. These indicate either a
680 * docking event, lid switch or display switch request. In Linux, these are
681 * handled by the dock, button and video drivers.
683 static int intel_opregion_video_event(struct notifier_block
*nb
,
684 unsigned long val
, void *data
)
686 struct intel_opregion
*opregion
= container_of(nb
, struct intel_opregion
,
688 struct acpi_bus_event
*event
= data
;
689 struct opregion_acpi
*acpi
;
692 if (strcmp(event
->device_class
, ACPI_VIDEO_CLASS
) != 0)
695 acpi
= opregion
->acpi
;
697 if (event
->type
== 0x80 && ((acpi
->cevt
& 1) == 0))
706 * Initialise the DIDL field in opregion. This passes a list of devices to
707 * the firmware. Values are defined by section B.4.2 of the ACPI specification
711 static void set_did(struct intel_opregion
*opregion
, int i
, u32 val
)
713 if (i
< ARRAY_SIZE(opregion
->acpi
->didl
)) {
714 opregion
->acpi
->didl
[i
] = val
;
716 i
-= ARRAY_SIZE(opregion
->acpi
->didl
);
718 if (WARN_ON(i
>= ARRAY_SIZE(opregion
->acpi
->did2
)))
721 opregion
->acpi
->did2
[i
] = val
;
725 static void intel_didl_outputs(struct drm_i915_private
*dev_priv
)
727 struct intel_opregion
*opregion
= dev_priv
->display
.opregion
;
728 struct intel_connector
*connector
;
729 struct drm_connector_list_iter conn_iter
;
730 int i
= 0, max_outputs
;
733 * In theory, did2, the extended didl, gets added at opregion version
734 * 3.0. In practice, however, we're supposed to set it for earlier
735 * versions as well, since a BIOS that doesn't understand did2 should
736 * not look at it anyway. Use a variable so we can tweak this if a need
739 max_outputs
= ARRAY_SIZE(opregion
->acpi
->didl
) +
740 ARRAY_SIZE(opregion
->acpi
->did2
);
742 intel_acpi_device_id_update(dev_priv
);
744 drm_connector_list_iter_begin(&dev_priv
->drm
, &conn_iter
);
745 for_each_intel_connector_iter(connector
, &conn_iter
) {
747 set_did(opregion
, i
, connector
->acpi_device_id
);
750 drm_connector_list_iter_end(&conn_iter
);
752 drm_dbg_kms(&dev_priv
->drm
, "%d outputs detected\n", i
);
755 drm_err(&dev_priv
->drm
,
756 "More than %d outputs in connector list\n",
759 /* If fewer than max outputs, the list must be null terminated */
761 set_did(opregion
, i
, 0);
764 static void intel_setup_cadls(struct drm_i915_private
*dev_priv
)
766 struct intel_opregion
*opregion
= dev_priv
->display
.opregion
;
767 struct intel_connector
*connector
;
768 struct drm_connector_list_iter conn_iter
;
772 * Initialize the CADL field from the connector device ids. This is
773 * essentially the same as copying from the DIDL. Technically, this is
774 * not always correct as display outputs may exist, but not active. This
775 * initialization is necessary for some Clevo laptops that check this
776 * field before processing the brightness and display switching hotkeys.
778 * Note that internal panels should be at the front of the connector
779 * list already, ensuring they're not left out.
781 drm_connector_list_iter_begin(&dev_priv
->drm
, &conn_iter
);
782 for_each_intel_connector_iter(connector
, &conn_iter
) {
783 if (i
>= ARRAY_SIZE(opregion
->acpi
->cadl
))
785 opregion
->acpi
->cadl
[i
++] = connector
->acpi_device_id
;
787 drm_connector_list_iter_end(&conn_iter
);
789 /* If fewer than 8 active devices, the list must be null terminated */
790 if (i
< ARRAY_SIZE(opregion
->acpi
->cadl
))
791 opregion
->acpi
->cadl
[i
] = 0;
794 static void swsci_setup(struct drm_i915_private
*dev_priv
)
796 struct intel_opregion
*opregion
= dev_priv
->display
.opregion
;
797 bool requested_callbacks
= false;
800 /* Sub-function code 0 is okay, let's allow them. */
801 opregion
->swsci_gbda_sub_functions
= 1;
802 opregion
->swsci_sbcb_sub_functions
= 1;
804 /* We use GBDA to ask for supported GBDA calls. */
805 if (swsci(dev_priv
, SWSCI_GBDA_SUPPORTED_CALLS
, 0, &tmp
) == 0) {
806 /* make the bits match the sub-function codes */
808 opregion
->swsci_gbda_sub_functions
|= tmp
;
812 * We also use GBDA to ask for _requested_ SBCB callbacks. The driver
813 * must not call interfaces that are not specifically requested by the
816 if (swsci(dev_priv
, SWSCI_GBDA_REQUESTED_CALLBACKS
, 0, &tmp
) == 0) {
817 /* here, the bits already match sub-function codes */
818 opregion
->swsci_sbcb_sub_functions
|= tmp
;
819 requested_callbacks
= true;
823 * But we use SBCB to ask for _supported_ SBCB calls. This does not mean
824 * the callback is _requested_. But we still can't call interfaces that
827 if (swsci(dev_priv
, SWSCI_SBCB_SUPPORTED_CALLBACKS
, 0, &tmp
) == 0) {
828 /* make the bits match the sub-function codes */
829 u32 low
= tmp
& 0x7ff;
830 u32 high
= tmp
& ~0xfff; /* bit 11 is reserved */
831 tmp
= (high
<< 4) | (low
<< 1) | 1;
833 /* best guess what to do with supported wrt requested */
834 if (requested_callbacks
) {
835 u32 req
= opregion
->swsci_sbcb_sub_functions
;
836 if ((req
& tmp
) != req
)
837 drm_dbg(&dev_priv
->drm
,
838 "SWSCI BIOS requested (%08x) SBCB callbacks that are not supported (%08x)\n",
840 /* XXX: for now, trust the requested callbacks */
841 /* opregion->swsci_sbcb_sub_functions &= tmp; */
843 opregion
->swsci_sbcb_sub_functions
|= tmp
;
847 drm_dbg(&dev_priv
->drm
,
848 "SWSCI GBDA callbacks %08x, SBCB callbacks %08x\n",
849 opregion
->swsci_gbda_sub_functions
,
850 opregion
->swsci_sbcb_sub_functions
);
853 static int intel_no_opregion_vbt_callback(const struct dmi_system_id
*id
)
855 DRM_DEBUG_KMS("Falling back to manually reading VBT from "
856 "VBIOS ROM for %s\n", id
->ident
);
860 static const struct dmi_system_id intel_no_opregion_vbt
[] = {
862 .callback
= intel_no_opregion_vbt_callback
,
863 .ident
= "ThinkCentre A57",
865 DMI_MATCH(DMI_SYS_VENDOR
, "LENOVO"),
866 DMI_MATCH(DMI_PRODUCT_NAME
, "97027RG"),
872 static int intel_load_vbt_firmware(struct drm_i915_private
*dev_priv
)
874 struct intel_opregion
*opregion
= dev_priv
->display
.opregion
;
875 const struct firmware
*fw
= NULL
;
876 const char *name
= dev_priv
->display
.params
.vbt_firmware
;
882 ret
= request_firmware(&fw
, name
, dev_priv
->drm
.dev
);
884 drm_err(&dev_priv
->drm
,
885 "Requesting VBT firmware \"%s\" failed (%d)\n",
890 if (intel_bios_is_valid_vbt(fw
->data
, fw
->size
)) {
891 opregion
->vbt_firmware
= kmemdup(fw
->data
, fw
->size
, GFP_KERNEL
);
892 if (opregion
->vbt_firmware
) {
893 drm_dbg_kms(&dev_priv
->drm
,
894 "Found valid VBT firmware \"%s\"\n", name
);
895 opregion
->vbt
= opregion
->vbt_firmware
;
896 opregion
->vbt_size
= fw
->size
;
902 drm_dbg_kms(&dev_priv
->drm
, "Invalid VBT firmware \"%s\"\n",
907 release_firmware(fw
);
912 int intel_opregion_setup(struct drm_i915_private
*dev_priv
)
914 struct intel_opregion
*opregion
;
915 struct pci_dev
*pdev
= to_pci_dev(dev_priv
->drm
.dev
);
917 char buf
[sizeof(OPREGION_SIGNATURE
)];
923 BUILD_BUG_ON(sizeof(struct opregion_header
) != 0x100);
924 BUILD_BUG_ON(sizeof(struct opregion_acpi
) != 0x100);
925 BUILD_BUG_ON(sizeof(struct opregion_swsci
) != 0x100);
926 BUILD_BUG_ON(sizeof(struct opregion_asle
) != 0x100);
927 BUILD_BUG_ON(sizeof(struct opregion_asle_ext
) != 0x400);
929 pci_read_config_dword(pdev
, ASLS
, &asls
);
930 drm_dbg(&dev_priv
->drm
, "graphic opregion physical addr: 0x%x\n",
933 drm_dbg(&dev_priv
->drm
, "ACPI OpRegion not supported!\n");
937 opregion
= kzalloc(sizeof(*opregion
), GFP_KERNEL
);
941 opregion
->i915
= dev_priv
;
942 dev_priv
->display
.opregion
= opregion
;
944 INIT_WORK(&opregion
->asle_work
, asle_work
);
946 base
= memremap(asls
, OPREGION_SIZE
, MEMREMAP_WB
);
952 memcpy(buf
, base
, sizeof(buf
));
954 if (memcmp(buf
, OPREGION_SIGNATURE
, 16)) {
955 drm_dbg(&dev_priv
->drm
, "opregion signature mismatch\n");
959 opregion
->header
= base
;
961 drm_dbg(&dev_priv
->drm
, "ACPI OpRegion version %u.%u.%u\n",
962 opregion
->header
->over
.major
,
963 opregion
->header
->over
.minor
,
964 opregion
->header
->over
.revision
);
966 mboxes
= opregion
->header
->mboxes
;
967 if (mboxes
& MBOX_ACPI
) {
968 drm_dbg(&dev_priv
->drm
, "Public ACPI methods supported\n");
969 opregion
->acpi
= base
+ OPREGION_ACPI_OFFSET
;
971 * Indicate we handle monitor hotplug events ourselves so we do
972 * not need ACPI notifications for them. Disabling these avoids
973 * triggering the AML code doing the notifation, which may be
974 * broken as Windows also seems to disable these.
976 opregion
->acpi
->chpd
= 1;
979 if (mboxes
& MBOX_SWSCI
) {
980 u8 major
= opregion
->header
->over
.major
;
983 drm_err(&dev_priv
->drm
, "SWSCI Mailbox #2 present for opregion v3.x, ignoring\n");
986 drm_dbg(&dev_priv
->drm
, "SWSCI Mailbox #2 present for opregion v2.x\n");
987 drm_dbg(&dev_priv
->drm
, "SWSCI supported\n");
988 opregion
->swsci
= base
+ OPREGION_SWSCI_OFFSET
;
989 swsci_setup(dev_priv
);
993 if (mboxes
& MBOX_ASLE
) {
994 drm_dbg(&dev_priv
->drm
, "ASLE supported\n");
995 opregion
->asle
= base
+ OPREGION_ASLE_OFFSET
;
997 opregion
->asle
->ardy
= ASLE_ARDY_NOT_READY
;
1000 if (mboxes
& MBOX_ASLE_EXT
) {
1001 drm_dbg(&dev_priv
->drm
, "ASLE extension supported\n");
1002 opregion
->asle_ext
= base
+ OPREGION_ASLE_EXT_OFFSET
;
1005 if (mboxes
& MBOX_BACKLIGHT
) {
1006 drm_dbg(&dev_priv
->drm
, "Mailbox #2 for backlight present\n");
1009 if (intel_load_vbt_firmware(dev_priv
) == 0)
1012 if (dmi_check_system(intel_no_opregion_vbt
))
1015 if (opregion
->header
->over
.major
>= 2 && opregion
->asle
&&
1016 opregion
->asle
->rvda
&& opregion
->asle
->rvds
) {
1017 resource_size_t rvda
= opregion
->asle
->rvda
;
1020 * opregion 2.0: rvda is the physical VBT address.
1022 * opregion 2.1+: rvda is unsigned, relative offset from
1023 * opregion base, and should never point within opregion.
1025 if (opregion
->header
->over
.major
> 2 ||
1026 opregion
->header
->over
.minor
>= 1) {
1027 drm_WARN_ON(&dev_priv
->drm
, rvda
< OPREGION_SIZE
);
1032 opregion
->rvda
= memremap(rvda
, opregion
->asle
->rvds
,
1035 vbt
= opregion
->rvda
;
1036 vbt_size
= opregion
->asle
->rvds
;
1037 if (intel_bios_is_valid_vbt(vbt
, vbt_size
)) {
1038 drm_dbg_kms(&dev_priv
->drm
,
1039 "Found valid VBT in ACPI OpRegion (RVDA)\n");
1040 opregion
->vbt
= vbt
;
1041 opregion
->vbt_size
= vbt_size
;
1044 drm_dbg_kms(&dev_priv
->drm
,
1045 "Invalid VBT in ACPI OpRegion (RVDA)\n");
1046 memunmap(opregion
->rvda
);
1047 opregion
->rvda
= NULL
;
1051 vbt
= base
+ OPREGION_VBT_OFFSET
;
1053 * The VBT specification says that if the ASLE ext mailbox is not used
1054 * its area is reserved, but on some CHT boards the VBT extends into the
1055 * ASLE ext area. Allow this even though it is against the spec, so we
1056 * do not end up rejecting the VBT on those boards (and end up not
1057 * finding the LCD panel because of this).
1059 vbt_size
= (mboxes
& MBOX_ASLE_EXT
) ?
1060 OPREGION_ASLE_EXT_OFFSET
: OPREGION_SIZE
;
1061 vbt_size
-= OPREGION_VBT_OFFSET
;
1062 if (intel_bios_is_valid_vbt(vbt
, vbt_size
)) {
1063 drm_dbg_kms(&dev_priv
->drm
,
1064 "Found valid VBT in ACPI OpRegion (Mailbox #4)\n");
1065 opregion
->vbt
= vbt
;
1066 opregion
->vbt_size
= vbt_size
;
1068 drm_dbg_kms(&dev_priv
->drm
,
1069 "Invalid VBT in ACPI OpRegion (Mailbox #4)\n");
1079 dev_priv
->display
.opregion
= NULL
;
1084 static int intel_use_opregion_panel_type_callback(const struct dmi_system_id
*id
)
1086 DRM_INFO("Using panel type from OpRegion on %s\n", id
->ident
);
1090 static const struct dmi_system_id intel_use_opregion_panel_type
[] = {
1092 .callback
= intel_use_opregion_panel_type_callback
,
1093 .ident
= "Conrac GmbH IX45GM2",
1094 .matches
= {DMI_MATCH(DMI_SYS_VENDOR
, "Conrac GmbH"),
1095 DMI_MATCH(DMI_PRODUCT_NAME
, "IX45GM2"),
1102 intel_opregion_get_panel_type(struct drm_i915_private
*dev_priv
)
1107 ret
= swsci(dev_priv
, SWSCI_GBDA_PANEL_DETAILS
, 0x0, &panel_details
);
1111 ret
= (panel_details
>> 8) & 0xff;
1113 drm_dbg_kms(&dev_priv
->drm
,
1114 "Invalid OpRegion panel type 0x%x\n", ret
);
1118 /* fall back to VBT panel type? */
1120 drm_dbg_kms(&dev_priv
->drm
, "No panel type in OpRegion\n");
1125 * So far we know that some machined must use it, others must not use it.
1126 * There doesn't seem to be any way to determine which way to go, except
1127 * via a quirk list :(
1129 if (!dmi_check_system(intel_use_opregion_panel_type
)) {
1130 drm_dbg_kms(&dev_priv
->drm
,
1131 "Ignoring OpRegion panel type (%d)\n", ret
- 1);
1139 * intel_opregion_get_edid - Fetch EDID from ACPI OpRegion mailbox #5
1140 * @intel_connector: eDP connector
1142 * This reads the ACPI Opregion mailbox #5 to extract the EDID that is passed
1146 * The EDID in the OpRegion, or NULL if there is none or it's invalid.
1149 const struct drm_edid
*intel_opregion_get_edid(struct intel_connector
*intel_connector
)
1151 struct drm_connector
*connector
= &intel_connector
->base
;
1152 struct drm_i915_private
*i915
= to_i915(connector
->dev
);
1153 struct intel_opregion
*opregion
= i915
->display
.opregion
;
1154 const struct drm_edid
*drm_edid
;
1158 if (!opregion
|| !opregion
->asle_ext
)
1161 edid
= opregion
->asle_ext
->bddc
;
1163 /* Validity corresponds to number of 128-byte blocks */
1164 len
= (opregion
->asle_ext
->phed
& ASLE_PHED_EDID_VALID_MASK
) * 128;
1165 if (!len
|| !memchr_inv(edid
, 0, len
))
1168 drm_edid
= drm_edid_alloc(edid
, len
);
1170 if (!drm_edid_valid(drm_edid
)) {
1171 drm_dbg_kms(&i915
->drm
, "Invalid EDID in ACPI OpRegion (Mailbox #5)\n");
1172 drm_edid_free(drm_edid
);
1179 const void *intel_opregion_get_vbt(struct drm_i915_private
*i915
, size_t *size
)
1181 struct intel_opregion
*opregion
= i915
->display
.opregion
;
1183 if (!opregion
|| !opregion
->vbt
)
1187 *size
= opregion
->vbt_size
;
1189 return opregion
->vbt
;
1192 bool intel_opregion_headless_sku(struct drm_i915_private
*i915
)
1194 struct intel_opregion
*opregion
= i915
->display
.opregion
;
1195 struct opregion_header
*header
;
1200 header
= opregion
->header
;
1202 if (!header
|| header
->over
.major
< 2 ||
1203 (header
->over
.major
== 2 && header
->over
.minor
< 3))
1206 return opregion
->header
->pcon
& PCON_HEADLESS_SKU
;
1209 void intel_opregion_register(struct drm_i915_private
*i915
)
1211 struct intel_opregion
*opregion
= i915
->display
.opregion
;
1216 if (opregion
->acpi
) {
1217 opregion
->acpi_notifier
.notifier_call
=
1218 intel_opregion_video_event
;
1219 register_acpi_notifier(&opregion
->acpi_notifier
);
1222 intel_opregion_resume(i915
);
1225 static void intel_opregion_resume_display(struct drm_i915_private
*i915
)
1227 struct intel_opregion
*opregion
= i915
->display
.opregion
;
1229 if (opregion
->acpi
) {
1230 intel_didl_outputs(i915
);
1231 intel_setup_cadls(i915
);
1234 * Notify BIOS we are ready to handle ACPI video ext notifs.
1235 * Right now, all the events are handled by the ACPI video
1236 * module. We don't actually need to do anything with them.
1238 opregion
->acpi
->csts
= 0;
1239 opregion
->acpi
->drdy
= 1;
1242 if (opregion
->asle
) {
1243 opregion
->asle
->tche
= ASLE_TCHE_BLC_EN
;
1244 opregion
->asle
->ardy
= ASLE_ARDY_READY
;
1247 /* Some platforms abuse the _DSM to enable MUX */
1248 intel_dsm_get_bios_data_funcs_supported(i915
);
1251 void intel_opregion_resume(struct drm_i915_private
*i915
)
1253 struct intel_opregion
*opregion
= i915
->display
.opregion
;
1258 if (HAS_DISPLAY(i915
))
1259 intel_opregion_resume_display(i915
);
1261 intel_opregion_notify_adapter(i915
, PCI_D0
);
1264 static void intel_opregion_suspend_display(struct drm_i915_private
*i915
)
1266 struct intel_opregion
*opregion
= i915
->display
.opregion
;
1269 opregion
->asle
->ardy
= ASLE_ARDY_NOT_READY
;
1271 cancel_work_sync(&opregion
->asle_work
);
1274 opregion
->acpi
->drdy
= 0;
1277 void intel_opregion_suspend(struct drm_i915_private
*i915
, pci_power_t state
)
1279 struct intel_opregion
*opregion
= i915
->display
.opregion
;
1284 intel_opregion_notify_adapter(i915
, state
);
1286 if (HAS_DISPLAY(i915
))
1287 intel_opregion_suspend_display(i915
);
1290 void intel_opregion_unregister(struct drm_i915_private
*i915
)
1292 struct intel_opregion
*opregion
= i915
->display
.opregion
;
1294 intel_opregion_suspend(i915
, PCI_D1
);
1299 if (opregion
->acpi_notifier
.notifier_call
) {
1300 unregister_acpi_notifier(&opregion
->acpi_notifier
);
1301 opregion
->acpi_notifier
.notifier_call
= NULL
;
1305 void intel_opregion_cleanup(struct drm_i915_private
*i915
)
1307 struct intel_opregion
*opregion
= i915
->display
.opregion
;
1312 memunmap(opregion
->header
);
1314 memunmap(opregion
->rvda
);
1315 kfree(opregion
->vbt_firmware
);
1317 i915
->display
.opregion
= NULL
;
1320 static int intel_opregion_show(struct seq_file
*m
, void *unused
)
1322 struct drm_i915_private
*i915
= m
->private;
1323 struct intel_opregion
*opregion
= i915
->display
.opregion
;
1326 seq_write(m
, opregion
->header
, OPREGION_SIZE
);
1331 DEFINE_SHOW_ATTRIBUTE(intel_opregion
);
1333 void intel_opregion_debugfs_register(struct drm_i915_private
*i915
)
1335 struct drm_minor
*minor
= i915
->drm
.primary
;
1337 debugfs_create_file("i915_opregion", 0444, minor
->debugfs_root
,
1338 i915
, &intel_opregion_fops
);