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1/*
2 * Copyright 2008 Intel Corporation <hong.liu@intel.com>
3 * Copyright 2008 Red Hat <mjg@redhat.com>
4 *
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:
12 *
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.
16 *
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
24 * SOFTWARE.
25 *
26 */
27
28#include <linux/acpi.h>
29#include <linux/dmi.h>
30#include <linux/firmware.h>
31#include <acpi/video.h>
32
33#include <drm/drm_edid.h>
34
35#include "i915_drv.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"
41
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
50
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) */
57
58#define PCON_HEADLESS_SKU BIT(13)
59
60struct opregion_header {
61 u8 signature[16];
62 u32 size;
63 struct {
64 u8 rsvd;
65 u8 revision;
66 u8 minor;
67 u8 major;
68 } __packed over;
69 u8 bios_ver[32];
70 u8 vbios_ver[16];
71 u8 driver_ver[16];
72 u32 mboxes;
73 u32 driver_model;
74 u32 pcon;
75 u8 dver[32];
76 u8 rsvd[124];
77} __packed;
78
79/* OpRegion mailbox #1: public ACPI methods */
80struct opregion_acpi {
81 u32 drdy; /* driver readiness */
82 u32 csts; /* notification status */
83 u32 cevt; /* current event */
84 u8 rsvd1[20];
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 */
100 u8 rsvd2[4];
101} __packed;
102
103/* OpRegion mailbox #2: SWSCI */
104struct opregion_swsci {
105 u32 scic; /* SWSCI command|status|data */
106 u32 parm; /* command parameters */
107 u32 dslp; /* driver sleep time-out */
108 u8 rsvd[244];
109} __packed;
110
111/* OpRegion mailbox #3: ASLE */
112struct 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 */
129 u64 fdss;
130 u32 fdsp;
131 u32 stat;
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 */
135 u8 rsvd[58];
136} __packed;
137
138/* OpRegion mailbox #5: ASLE ext */
139struct opregion_asle_ext {
140 u32 phed; /* Panel Header */
141 u8 bddc[256]; /* Panel EDID */
142 u8 rsvd[764];
143} __packed;
144
145/* Driver readiness indicator */
146#define ASLE_ARDY_READY (1 << 0)
147#define ASLE_ARDY_NOT_READY (0 << 0)
148
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
160/* response bits */
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)
170
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)
176
177/* ASLE backlight brightness to set */
178#define ASLE_BCLP_VALID (1<<31)
179#define ASLE_BCLP_MSK (~(1<<31))
180
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)
186
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)
192
193#define ASLE_CBLV_VALID (1<<31)
194
195/* IUER */
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)
203
204#define ASLE_PHED_EDID_VALID_MASK 0x3
205
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
217
218#define SWSCI_FUNCTION_CODE(main, sub) \
219 ((main) << SWSCI_SCIC_MAIN_FUNCTION_SHIFT | \
220 (sub) << SWSCI_SCIC_SUB_FUNCTION_SHIFT)
221
222/* SWSCI: Get BIOS Data (GBDA) */
223#define SWSCI_GBDA 4
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)
231
232/* SWSCI: System BIOS Callbacks (SBCB) */
233#define SWSCI_SBCB 6
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)
250
251#define MAX_DSLP 1500
252
253#define OPREGION_SIZE (8 * 1024)
254
255struct intel_opregion {
256 struct drm_i915_private *i915;
257
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;
265 void *rvda;
266 void *vbt_firmware;
267 const void *vbt;
268 u32 vbt_size;
269 struct work_struct asle_work;
270 struct notifier_block acpi_notifier;
271};
272
273static int check_swsci_function(struct drm_i915_private *i915, u32 function)
274{
275 struct intel_opregion *opregion = i915->display.opregion;
276 struct opregion_swsci *swsci;
277 u32 main_function, sub_function;
278
279 if (!opregion)
280 return -ENODEV;
281
282 swsci = opregion->swsci;
283 if (!swsci)
284 return -ENODEV;
285
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;
290
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)
295 return -EINVAL;
296 } else if (main_function == SWSCI_GBDA) {
297 if ((opregion->swsci_gbda_sub_functions &
298 (1 << sub_function)) == 0)
299 return -EINVAL;
300 }
301
302 return 0;
303}
304
305static int swsci(struct drm_i915_private *dev_priv,
306 u32 function, u32 parm, u32 *parm_out)
307{
308 struct opregion_swsci *swsci;
309 struct pci_dev *pdev = to_pci_dev(dev_priv->drm.dev);
310 u32 scic, dslp;
311 u16 swsci_val;
312 int ret;
313
314 ret = check_swsci_function(dev_priv, function);
315 if (ret)
316 return ret;
317
318 swsci = dev_priv->display.opregion->swsci;
319
320 /* Driver sleep timeout in ms. */
321 dslp = swsci->dslp;
322 if (!dslp) {
323 /* The spec says 2ms should be the default, but it's too small
324 * for some machines. */
325 dslp = 50;
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);
330 dslp = MAX_DSLP;
331 }
332
333 /* The spec tells us to do this, but we are the only user... */
334 scic = swsci->scic;
335 if (scic & SWSCI_SCIC_INDICATOR) {
336 drm_dbg(&dev_priv->drm, "SWSCI request already in progress\n");
337 return -EBUSY;
338 }
339
340 scic = function | SWSCI_SCIC_INDICATOR;
341
342 swsci->parm = parm;
343 swsci->scic = scic;
344
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);
351 }
352
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);
356
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");
361 return -ETIMEDOUT;
362 }
363
364 scic = (scic & SWSCI_SCIC_EXIT_STATUS_MASK) >>
365 SWSCI_SCIC_EXIT_STATUS_SHIFT;
366
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);
370 return -EIO;
371 }
372
373 if (parm_out)
374 *parm_out = swsci->parm;
375
376 return 0;
377
378#undef C
379}
380
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
385
386int intel_opregion_notify_encoder(struct intel_encoder *intel_encoder,
387 bool enable)
388{
389 struct drm_i915_private *dev_priv = to_i915(intel_encoder->base.dev);
390 u32 parm = 0;
391 u32 type = 0;
392 u32 port;
393 int ret;
394
395 /* don't care about old stuff for now */
396 if (!HAS_DDI(dev_priv))
397 return 0;
398
399 /* Avoid port out of bounds checks if SWSCI isn't there. */
400 ret = check_swsci_function(dev_priv, SWSCI_SBCB_DISPLAY_POWER_STATE);
401 if (ret)
402 return ret;
403
404 if (intel_encoder->type == INTEL_OUTPUT_DSI)
405 port = 0;
406 else
407 port = intel_encoder->port;
408
409 if (port == PORT_E) {
410 port = 0;
411 } else {
412 parm |= 1 << port;
413 port++;
414 }
415
416 /*
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.
422 */
423 if (port > 4) {
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);
428 return -EINVAL;
429 }
430
431 if (!enable)
432 parm |= 4 << 8;
433
434 switch (intel_encoder->type) {
435 case INTEL_OUTPUT_ANALOG:
436 type = DISPLAY_TYPE_CRT;
437 break;
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;
443 break;
444 case INTEL_OUTPUT_EDP:
445 case INTEL_OUTPUT_DSI:
446 type = DISPLAY_TYPE_INTERNAL_FLAT_PANEL;
447 break;
448 default:
449 drm_WARN_ONCE(&dev_priv->drm, 1,
450 "unsupported intel_encoder type %d\n",
451 intel_encoder->type);
452 return -EINVAL;
453 }
454
455 parm |= type << (16 + port * 3);
456
457 return swsci(dev_priv, SWSCI_SBCB_DISPLAY_POWER_STATE, parm, NULL);
458}
459
460static const struct {
461 pci_power_t pci_power_state;
462 u32 parm;
463} power_state_map[] = {
464 { PCI_D0, 0x00 },
465 { PCI_D1, 0x01 },
466 { PCI_D2, 0x02 },
467 { PCI_D3hot, 0x04 },
468 { PCI_D3cold, 0x04 },
469};
470
471int intel_opregion_notify_adapter(struct drm_i915_private *dev_priv,
472 pci_power_t state)
473{
474 int i;
475
476 if (!HAS_DDI(dev_priv))
477 return 0;
478
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);
483 }
484
485 return -EINVAL;
486}
487
488static u32 asle_set_backlight(struct drm_i915_private *dev_priv, u32 bclp)
489{
490 struct intel_connector *connector;
491 struct drm_connector_list_iter conn_iter;
492 struct opregion_asle *asle = dev_priv->display.opregion->asle;
493
494 drm_dbg(&dev_priv->drm, "bclp = 0x%08x\n", bclp);
495
496 if (acpi_video_get_backlight_type() == acpi_backlight_native) {
497 drm_dbg_kms(&dev_priv->drm,
498 "opregion backlight request ignored\n");
499 return 0;
500 }
501
502 if (!(bclp & ASLE_BCLP_VALID))
503 return ASLC_BACKLIGHT_FAILED;
504
505 bclp &= ASLE_BCLP_MSK;
506 if (bclp > 255)
507 return ASLC_BACKLIGHT_FAILED;
508
509 drm_modeset_lock(&dev_priv->drm.mode_config.connection_mutex, NULL);
510
511 /*
512 * Update backlight on all connectors that support backlight (usually
513 * only one).
514 */
515 drm_dbg_kms(&dev_priv->drm, "updating opregion backlight %d/255\n",
516 bclp);
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;
522
523 drm_modeset_unlock(&dev_priv->drm.mode_config.connection_mutex);
524
525
526 return 0;
527}
528
529static u32 asle_set_als_illum(struct drm_i915_private *dev_priv, u32 alsi)
530{
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;
535}
536
537static u32 asle_set_pwm_freq(struct drm_i915_private *dev_priv, u32 pfmb)
538{
539 drm_dbg(&dev_priv->drm, "PWM freq is not supported\n");
540 return ASLC_PWM_FREQ_FAILED;
541}
542
543static u32 asle_set_pfit(struct drm_i915_private *dev_priv, u32 pfit)
544{
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;
549}
550
551static u32 asle_set_supported_rotation_angles(struct drm_i915_private *dev_priv, u32 srot)
552{
553 drm_dbg(&dev_priv->drm, "SROT is not supported\n");
554 return ASLC_ROTATION_ANGLES_FAILED;
555}
556
557static u32 asle_set_button_array(struct drm_i915_private *dev_priv, u32 iuer)
558{
559 if (!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");
577
578 return ASLC_BUTTON_ARRAY_FAILED;
579}
580
581static u32 asle_set_convertible(struct drm_i915_private *dev_priv, u32 iuer)
582{
583 if (iuer & ASLE_IUER_CONVERTIBLE)
584 drm_dbg(&dev_priv->drm,
585 "Convertible is not supported (clamshell)\n");
586 else
587 drm_dbg(&dev_priv->drm,
588 "Convertible is not supported (slate)\n");
589
590 return ASLC_CONVERTIBLE_FAILED;
591}
592
593static u32 asle_set_docking(struct drm_i915_private *dev_priv, u32 iuer)
594{
595 if (iuer & ASLE_IUER_DOCKING)
596 drm_dbg(&dev_priv->drm, "Docking is not supported (docked)\n");
597 else
598 drm_dbg(&dev_priv->drm,
599 "Docking is not supported (undocked)\n");
600
601 return ASLC_DOCKING_FAILED;
602}
603
604static u32 asle_isct_state(struct drm_i915_private *dev_priv)
605{
606 drm_dbg(&dev_priv->drm, "ISCT is not supported\n");
607 return ASLC_ISCT_STATE_FAILED;
608}
609
610static void asle_work(struct work_struct *work)
611{
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;
616 u32 aslc_stat = 0;
617 u32 aslc_req;
618
619 if (!asle)
620 return;
621
622 aslc_req = asle->aslc;
623
624 if (!(aslc_req & ASLC_REQ_MSK)) {
625 drm_dbg(&dev_priv->drm,
626 "No request on ASLC interrupt 0x%08x\n", aslc_req);
627 return;
628 }
629
630 if (aslc_req & ASLC_SET_ALS_ILLUM)
631 aslc_stat |= asle_set_als_illum(dev_priv, asle->alsi);
632
633 if (aslc_req & ASLC_SET_BACKLIGHT)
634 aslc_stat |= asle_set_backlight(dev_priv, asle->bclp);
635
636 if (aslc_req & ASLC_SET_PFIT)
637 aslc_stat |= asle_set_pfit(dev_priv, asle->pfit);
638
639 if (aslc_req & ASLC_SET_PWM_FREQ)
640 aslc_stat |= asle_set_pwm_freq(dev_priv, asle->pfmb);
641
642 if (aslc_req & ASLC_SUPPORTED_ROTATION_ANGLES)
643 aslc_stat |= asle_set_supported_rotation_angles(dev_priv,
644 asle->srot);
645
646 if (aslc_req & ASLC_BUTTON_ARRAY)
647 aslc_stat |= asle_set_button_array(dev_priv, asle->iuer);
648
649 if (aslc_req & ASLC_CONVERTIBLE_INDICATOR)
650 aslc_stat |= asle_set_convertible(dev_priv, asle->iuer);
651
652 if (aslc_req & ASLC_DOCKING_INDICATOR)
653 aslc_stat |= asle_set_docking(dev_priv, asle->iuer);
654
655 if (aslc_req & ASLC_ISCT_STATE_CHANGE)
656 aslc_stat |= asle_isct_state(dev_priv);
657
658 asle->aslc = aslc_stat;
659}
660
661bool intel_opregion_asle_present(struct drm_i915_private *i915)
662{
663 return i915->display.opregion && i915->display.opregion->asle;
664}
665
666void intel_opregion_asle_intr(struct drm_i915_private *i915)
667{
668 struct intel_opregion *opregion = i915->display.opregion;
669
670 if (opregion && opregion->asle)
671 queue_work(i915->unordered_wq, &opregion->asle_work);
672}
673
674#define ACPI_EV_DISPLAY_SWITCH (1<<0)
675#define ACPI_EV_LID (1<<1)
676#define ACPI_EV_DOCK (1<<2)
677
678/*
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.
682 */
683static int intel_opregion_video_event(struct notifier_block *nb,
684 unsigned long val, void *data)
685{
686 struct intel_opregion *opregion = container_of(nb, struct intel_opregion,
687 acpi_notifier);
688 struct acpi_bus_event *event = data;
689 struct opregion_acpi *acpi;
690 int ret = NOTIFY_OK;
691
692 if (strcmp(event->device_class, ACPI_VIDEO_CLASS) != 0)
693 return NOTIFY_DONE;
694
695 acpi = opregion->acpi;
696
697 if (event->type == 0x80 && ((acpi->cevt & 1) == 0))
698 ret = NOTIFY_BAD;
699
700 acpi->csts = 0;
701
702 return ret;
703}
704
705/*
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
708 * (version 3)
709 */
710
711static void set_did(struct intel_opregion *opregion, int i, u32 val)
712{
713 if (i < ARRAY_SIZE(opregion->acpi->didl)) {
714 opregion->acpi->didl[i] = val;
715 } else {
716 i -= ARRAY_SIZE(opregion->acpi->didl);
717
718 if (WARN_ON(i >= ARRAY_SIZE(opregion->acpi->did2)))
719 return;
720
721 opregion->acpi->did2[i] = val;
722 }
723}
724
725static void intel_didl_outputs(struct drm_i915_private *dev_priv)
726{
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;
731
732 /*
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
737 * arises later.
738 */
739 max_outputs = ARRAY_SIZE(opregion->acpi->didl) +
740 ARRAY_SIZE(opregion->acpi->did2);
741
742 intel_acpi_device_id_update(dev_priv);
743
744 drm_connector_list_iter_begin(&dev_priv->drm, &conn_iter);
745 for_each_intel_connector_iter(connector, &conn_iter) {
746 if (i < max_outputs)
747 set_did(opregion, i, connector->acpi_device_id);
748 i++;
749 }
750 drm_connector_list_iter_end(&conn_iter);
751
752 drm_dbg_kms(&dev_priv->drm, "%d outputs detected\n", i);
753
754 if (i > max_outputs)
755 drm_err(&dev_priv->drm,
756 "More than %d outputs in connector list\n",
757 max_outputs);
758
759 /* If fewer than max outputs, the list must be null terminated */
760 if (i < max_outputs)
761 set_did(opregion, i, 0);
762}
763
764static void intel_setup_cadls(struct drm_i915_private *dev_priv)
765{
766 struct intel_opregion *opregion = dev_priv->display.opregion;
767 struct intel_connector *connector;
768 struct drm_connector_list_iter conn_iter;
769 int i = 0;
770
771 /*
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.
777 *
778 * Note that internal panels should be at the front of the connector
779 * list already, ensuring they're not left out.
780 */
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))
784 break;
785 opregion->acpi->cadl[i++] = connector->acpi_device_id;
786 }
787 drm_connector_list_iter_end(&conn_iter);
788
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;
792}
793
794static void swsci_setup(struct drm_i915_private *dev_priv)
795{
796 struct intel_opregion *opregion = dev_priv->display.opregion;
797 bool requested_callbacks = false;
798 u32 tmp;
799
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;
803
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 */
807 tmp <<= 1;
808 opregion->swsci_gbda_sub_functions |= tmp;
809 }
810
811 /*
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
814 * bios.
815 */
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;
820 }
821
822 /*
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
825 * are not requested.
826 */
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;
832
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",
839 req, tmp);
840 /* XXX: for now, trust the requested callbacks */
841 /* opregion->swsci_sbcb_sub_functions &= tmp; */
842 } else {
843 opregion->swsci_sbcb_sub_functions |= tmp;
844 }
845 }
846
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);
851}
852
853static int intel_no_opregion_vbt_callback(const struct dmi_system_id *id)
854{
855 DRM_DEBUG_KMS("Falling back to manually reading VBT from "
856 "VBIOS ROM for %s\n", id->ident);
857 return 1;
858}
859
860static const struct dmi_system_id intel_no_opregion_vbt[] = {
861 {
862 .callback = intel_no_opregion_vbt_callback,
863 .ident = "ThinkCentre A57",
864 .matches = {
865 DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
866 DMI_MATCH(DMI_PRODUCT_NAME, "97027RG"),
867 },
868 },
869 { }
870};
871
872static int intel_load_vbt_firmware(struct drm_i915_private *dev_priv)
873{
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;
877 int ret;
878
879 if (!name || !*name)
880 return -ENOENT;
881
882 ret = request_firmware(&fw, name, dev_priv->drm.dev);
883 if (ret) {
884 drm_err(&dev_priv->drm,
885 "Requesting VBT firmware \"%s\" failed (%d)\n",
886 name, ret);
887 return ret;
888 }
889
890 if (intel_bios_is_valid_vbt(dev_priv, 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;
897 ret = 0;
898 } else {
899 ret = -ENOMEM;
900 }
901 } else {
902 drm_dbg_kms(&dev_priv->drm, "Invalid VBT firmware \"%s\"\n",
903 name);
904 ret = -EINVAL;
905 }
906
907 release_firmware(fw);
908
909 return ret;
910}
911
912int intel_opregion_setup(struct drm_i915_private *dev_priv)
913{
914 struct intel_opregion *opregion;
915 struct pci_dev *pdev = to_pci_dev(dev_priv->drm.dev);
916 u32 asls, mboxes;
917 char buf[sizeof(OPREGION_SIGNATURE)];
918 int err = 0;
919 void *base;
920 const void *vbt;
921 u32 vbt_size;
922
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);
928
929 pci_read_config_dword(pdev, ASLS, &asls);
930 drm_dbg(&dev_priv->drm, "graphic opregion physical addr: 0x%x\n",
931 asls);
932 if (asls == 0) {
933 drm_dbg(&dev_priv->drm, "ACPI OpRegion not supported!\n");
934 return -ENOTSUPP;
935 }
936
937 opregion = kzalloc(sizeof(*opregion), GFP_KERNEL);
938 if (!opregion)
939 return -ENOMEM;
940
941 opregion->i915 = dev_priv;
942 dev_priv->display.opregion = opregion;
943
944 INIT_WORK(&opregion->asle_work, asle_work);
945
946 base = memremap(asls, OPREGION_SIZE, MEMREMAP_WB);
947 if (!base) {
948 err = -ENOMEM;
949 goto err_memremap;
950 }
951
952 memcpy(buf, base, sizeof(buf));
953
954 if (memcmp(buf, OPREGION_SIGNATURE, 16)) {
955 drm_dbg(&dev_priv->drm, "opregion signature mismatch\n");
956 err = -EINVAL;
957 goto err_out;
958 }
959 opregion->header = base;
960
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);
965
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;
970 /*
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.
975 */
976 opregion->acpi->chpd = 1;
977 }
978
979 if (mboxes & MBOX_SWSCI) {
980 u8 major = opregion->header->over.major;
981
982 if (major >= 3) {
983 drm_err(&dev_priv->drm, "SWSCI Mailbox #2 present for opregion v3.x, ignoring\n");
984 } else {
985 if (major >= 2)
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);
990 }
991 }
992
993 if (mboxes & MBOX_ASLE) {
994 drm_dbg(&dev_priv->drm, "ASLE supported\n");
995 opregion->asle = base + OPREGION_ASLE_OFFSET;
996
997 opregion->asle->ardy = ASLE_ARDY_NOT_READY;
998 }
999
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;
1003 }
1004
1005 if (mboxes & MBOX_BACKLIGHT) {
1006 drm_dbg(&dev_priv->drm, "Mailbox #2 for backlight present\n");
1007 }
1008
1009 if (intel_load_vbt_firmware(dev_priv) == 0)
1010 goto out;
1011
1012 if (dmi_check_system(intel_no_opregion_vbt))
1013 goto out;
1014
1015 if (opregion->header->over.major >= 2 && opregion->asle &&
1016 opregion->asle->rvda && opregion->asle->rvds) {
1017 resource_size_t rvda = opregion->asle->rvda;
1018
1019 /*
1020 * opregion 2.0: rvda is the physical VBT address.
1021 *
1022 * opregion 2.1+: rvda is unsigned, relative offset from
1023 * opregion base, and should never point within opregion.
1024 */
1025 if (opregion->header->over.major > 2 ||
1026 opregion->header->over.minor >= 1) {
1027 drm_WARN_ON(&dev_priv->drm, rvda < OPREGION_SIZE);
1028
1029 rvda += asls;
1030 }
1031
1032 opregion->rvda = memremap(rvda, opregion->asle->rvds,
1033 MEMREMAP_WB);
1034
1035 vbt = opregion->rvda;
1036 vbt_size = opregion->asle->rvds;
1037 if (intel_bios_is_valid_vbt(dev_priv, 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;
1042 goto out;
1043 } else {
1044 drm_dbg_kms(&dev_priv->drm,
1045 "Invalid VBT in ACPI OpRegion (RVDA)\n");
1046 memunmap(opregion->rvda);
1047 opregion->rvda = NULL;
1048 }
1049 }
1050
1051 vbt = base + OPREGION_VBT_OFFSET;
1052 /*
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).
1058 */
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(dev_priv, 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;
1067 } else {
1068 drm_dbg_kms(&dev_priv->drm,
1069 "Invalid VBT in ACPI OpRegion (Mailbox #4)\n");
1070 }
1071
1072out:
1073 return 0;
1074
1075err_out:
1076 memunmap(base);
1077err_memremap:
1078 kfree(opregion);
1079 dev_priv->display.opregion = NULL;
1080
1081 return err;
1082}
1083
1084static int intel_use_opregion_panel_type_callback(const struct dmi_system_id *id)
1085{
1086 DRM_INFO("Using panel type from OpRegion on %s\n", id->ident);
1087 return 1;
1088}
1089
1090static const struct dmi_system_id intel_use_opregion_panel_type[] = {
1091 {
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"),
1096 },
1097 },
1098 { }
1099};
1100
1101int
1102intel_opregion_get_panel_type(struct drm_i915_private *dev_priv)
1103{
1104 u32 panel_details;
1105 int ret;
1106
1107 ret = swsci(dev_priv, SWSCI_GBDA_PANEL_DETAILS, 0x0, &panel_details);
1108 if (ret)
1109 return ret;
1110
1111 ret = (panel_details >> 8) & 0xff;
1112 if (ret > 0x10) {
1113 drm_dbg_kms(&dev_priv->drm,
1114 "Invalid OpRegion panel type 0x%x\n", ret);
1115 return -EINVAL;
1116 }
1117
1118 /* fall back to VBT panel type? */
1119 if (ret == 0x0) {
1120 drm_dbg_kms(&dev_priv->drm, "No panel type in OpRegion\n");
1121 return -ENODEV;
1122 }
1123
1124 /*
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 :(
1128 */
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);
1132 return -ENODEV;
1133 }
1134
1135 return ret - 1;
1136}
1137
1138/**
1139 * intel_opregion_get_edid - Fetch EDID from ACPI OpRegion mailbox #5
1140 * @intel_connector: eDP connector
1141 *
1142 * This reads the ACPI Opregion mailbox #5 to extract the EDID that is passed
1143 * to it.
1144 *
1145 * Returns:
1146 * The EDID in the OpRegion, or NULL if there is none or it's invalid.
1147 *
1148 */
1149const struct drm_edid *intel_opregion_get_edid(struct intel_connector *intel_connector)
1150{
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;
1155 const void *edid;
1156 int len;
1157
1158 if (!opregion || !opregion->asle_ext)
1159 return NULL;
1160
1161 edid = opregion->asle_ext->bddc;
1162
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))
1166 return NULL;
1167
1168 drm_edid = drm_edid_alloc(edid, len);
1169
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);
1173 drm_edid = NULL;
1174 }
1175
1176 return drm_edid;
1177}
1178
1179const void *intel_opregion_get_vbt(struct drm_i915_private *i915, size_t *size)
1180{
1181 struct intel_opregion *opregion = i915->display.opregion;
1182
1183 if (!opregion || !opregion->vbt)
1184 return NULL;
1185
1186 if (size)
1187 *size = opregion->vbt_size;
1188
1189 return opregion->vbt;
1190}
1191
1192bool intel_opregion_headless_sku(struct drm_i915_private *i915)
1193{
1194 struct intel_opregion *opregion = i915->display.opregion;
1195 struct opregion_header *header;
1196
1197 if (!opregion)
1198 return false;
1199
1200 header = opregion->header;
1201
1202 if (!header || header->over.major < 2 ||
1203 (header->over.major == 2 && header->over.minor < 3))
1204 return false;
1205
1206 return opregion->header->pcon & PCON_HEADLESS_SKU;
1207}
1208
1209void intel_opregion_register(struct drm_i915_private *i915)
1210{
1211 struct intel_opregion *opregion = i915->display.opregion;
1212
1213 if (!opregion)
1214 return;
1215
1216 if (opregion->acpi) {
1217 opregion->acpi_notifier.notifier_call =
1218 intel_opregion_video_event;
1219 register_acpi_notifier(&opregion->acpi_notifier);
1220 }
1221
1222 intel_opregion_resume(i915);
1223}
1224
1225static void intel_opregion_resume_display(struct drm_i915_private *i915)
1226{
1227 struct intel_opregion *opregion = i915->display.opregion;
1228
1229 if (opregion->acpi) {
1230 intel_didl_outputs(i915);
1231 intel_setup_cadls(i915);
1232
1233 /*
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.
1237 */
1238 opregion->acpi->csts = 0;
1239 opregion->acpi->drdy = 1;
1240 }
1241
1242 if (opregion->asle) {
1243 opregion->asle->tche = ASLE_TCHE_BLC_EN;
1244 opregion->asle->ardy = ASLE_ARDY_READY;
1245 }
1246
1247 /* Some platforms abuse the _DSM to enable MUX */
1248 intel_dsm_get_bios_data_funcs_supported(i915);
1249}
1250
1251void intel_opregion_resume(struct drm_i915_private *i915)
1252{
1253 struct intel_opregion *opregion = i915->display.opregion;
1254
1255 if (!opregion)
1256 return;
1257
1258 if (HAS_DISPLAY(i915))
1259 intel_opregion_resume_display(i915);
1260
1261 intel_opregion_notify_adapter(i915, PCI_D0);
1262}
1263
1264static void intel_opregion_suspend_display(struct drm_i915_private *i915)
1265{
1266 struct intel_opregion *opregion = i915->display.opregion;
1267
1268 if (opregion->asle)
1269 opregion->asle->ardy = ASLE_ARDY_NOT_READY;
1270
1271 cancel_work_sync(&opregion->asle_work);
1272
1273 if (opregion->acpi)
1274 opregion->acpi->drdy = 0;
1275}
1276
1277void intel_opregion_suspend(struct drm_i915_private *i915, pci_power_t state)
1278{
1279 struct intel_opregion *opregion = i915->display.opregion;
1280
1281 if (!opregion)
1282 return;
1283
1284 intel_opregion_notify_adapter(i915, state);
1285
1286 if (HAS_DISPLAY(i915))
1287 intel_opregion_suspend_display(i915);
1288}
1289
1290void intel_opregion_unregister(struct drm_i915_private *i915)
1291{
1292 struct intel_opregion *opregion = i915->display.opregion;
1293
1294 intel_opregion_suspend(i915, PCI_D1);
1295
1296 if (!opregion)
1297 return;
1298
1299 if (opregion->acpi_notifier.notifier_call) {
1300 unregister_acpi_notifier(&opregion->acpi_notifier);
1301 opregion->acpi_notifier.notifier_call = NULL;
1302 }
1303}
1304
1305void intel_opregion_cleanup(struct drm_i915_private *i915)
1306{
1307 struct intel_opregion *opregion = i915->display.opregion;
1308
1309 if (!opregion)
1310 return;
1311
1312 memunmap(opregion->header);
1313 if (opregion->rvda)
1314 memunmap(opregion->rvda);
1315 kfree(opregion->vbt_firmware);
1316 kfree(opregion);
1317 i915->display.opregion = NULL;
1318}
1319
1320static int intel_opregion_show(struct seq_file *m, void *unused)
1321{
1322 struct drm_i915_private *i915 = m->private;
1323 struct intel_opregion *opregion = i915->display.opregion;
1324
1325 if (opregion)
1326 seq_write(m, opregion->header, OPREGION_SIZE);
1327
1328 return 0;
1329}
1330
1331DEFINE_SHOW_ATTRIBUTE(intel_opregion);
1332
1333void intel_opregion_debugfs_register(struct drm_i915_private *i915)
1334{
1335 struct drm_minor *minor = i915->drm.primary;
1336
1337 debugfs_create_file("i915_opregion", 0444, minor->debugfs_root,
1338 i915, &intel_opregion_fops);
1339}