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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 "display/intel_panel.h"
34
35#include "i915_drv.h"
36#include "intel_acpi.h"
37#include "intel_display_types.h"
38#include "intel_opregion.h"
39
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
47#define OPREGION_ASLE_EXT_OFFSET 0x1C00
48
49#define OPREGION_SIGNATURE "IntelGraphicsMem"
50#define MBOX_ACPI (1<<0)
51#define MBOX_SWSCI (1<<1)
52#define MBOX_ASLE (1<<2)
53#define MBOX_ASLE_EXT (1<<4)
54
55struct opregion_header {
56 u8 signature[16];
57 u32 size;
58 struct {
59 u8 rsvd;
60 u8 revision;
61 u8 minor;
62 u8 major;
63 } __packed over;
64 u8 bios_ver[32];
65 u8 vbios_ver[16];
66 u8 driver_ver[16];
67 u32 mboxes;
68 u32 driver_model;
69 u32 pcon;
70 u8 dver[32];
71 u8 rsvd[124];
72} __packed;
73
74/* OpRegion mailbox #1: public ACPI methods */
75struct opregion_acpi {
76 u32 drdy; /* driver readiness */
77 u32 csts; /* notification status */
78 u32 cevt; /* current event */
79 u8 rsvd1[20];
80 u32 didl[8]; /* supported display devices ID list */
81 u32 cpdl[8]; /* currently presented display list */
82 u32 cadl[8]; /* currently active display list */
83 u32 nadl[8]; /* next active devices list */
84 u32 aslp; /* ASL sleep time-out */
85 u32 tidx; /* toggle table index */
86 u32 chpd; /* current hotplug enable indicator */
87 u32 clid; /* current lid state*/
88 u32 cdck; /* current docking state */
89 u32 sxsw; /* Sx state resume */
90 u32 evts; /* ASL supported events */
91 u32 cnot; /* current OS notification */
92 u32 nrdy; /* driver status */
93 u32 did2[7]; /* extended supported display devices ID list */
94 u32 cpd2[7]; /* extended attached display devices list */
95 u8 rsvd2[4];
96} __packed;
97
98/* OpRegion mailbox #2: SWSCI */
99struct opregion_swsci {
100 u32 scic; /* SWSCI command|status|data */
101 u32 parm; /* command parameters */
102 u32 dslp; /* driver sleep time-out */
103 u8 rsvd[244];
104} __packed;
105
106/* OpRegion mailbox #3: ASLE */
107struct opregion_asle {
108 u32 ardy; /* driver readiness */
109 u32 aslc; /* ASLE interrupt command */
110 u32 tche; /* technology enabled indicator */
111 u32 alsi; /* current ALS illuminance reading */
112 u32 bclp; /* backlight brightness to set */
113 u32 pfit; /* panel fitting state */
114 u32 cblv; /* current brightness level */
115 u16 bclm[20]; /* backlight level duty cycle mapping table */
116 u32 cpfm; /* current panel fitting mode */
117 u32 epfm; /* enabled panel fitting modes */
118 u8 plut[74]; /* panel LUT and identifier */
119 u32 pfmb; /* PWM freq and min brightness */
120 u32 cddv; /* color correction default values */
121 u32 pcft; /* power conservation features */
122 u32 srot; /* supported rotation angles */
123 u32 iuer; /* IUER events */
124 u64 fdss;
125 u32 fdsp;
126 u32 stat;
127 u64 rvda; /* Physical (2.0) or relative from opregion (2.1+)
128 * address of raw VBT data. */
129 u32 rvds; /* Size of raw vbt data */
130 u8 rsvd[58];
131} __packed;
132
133/* OpRegion mailbox #5: ASLE ext */
134struct opregion_asle_ext {
135 u32 phed; /* Panel Header */
136 u8 bddc[256]; /* Panel EDID */
137 u8 rsvd[764];
138} __packed;
139
140/* Driver readiness indicator */
141#define ASLE_ARDY_READY (1 << 0)
142#define ASLE_ARDY_NOT_READY (0 << 0)
143
144/* ASLE Interrupt Command (ASLC) bits */
145#define ASLC_SET_ALS_ILLUM (1 << 0)
146#define ASLC_SET_BACKLIGHT (1 << 1)
147#define ASLC_SET_PFIT (1 << 2)
148#define ASLC_SET_PWM_FREQ (1 << 3)
149#define ASLC_SUPPORTED_ROTATION_ANGLES (1 << 4)
150#define ASLC_BUTTON_ARRAY (1 << 5)
151#define ASLC_CONVERTIBLE_INDICATOR (1 << 6)
152#define ASLC_DOCKING_INDICATOR (1 << 7)
153#define ASLC_ISCT_STATE_CHANGE (1 << 8)
154#define ASLC_REQ_MSK 0x1ff
155/* response bits */
156#define ASLC_ALS_ILLUM_FAILED (1 << 10)
157#define ASLC_BACKLIGHT_FAILED (1 << 12)
158#define ASLC_PFIT_FAILED (1 << 14)
159#define ASLC_PWM_FREQ_FAILED (1 << 16)
160#define ASLC_ROTATION_ANGLES_FAILED (1 << 18)
161#define ASLC_BUTTON_ARRAY_FAILED (1 << 20)
162#define ASLC_CONVERTIBLE_FAILED (1 << 22)
163#define ASLC_DOCKING_FAILED (1 << 24)
164#define ASLC_ISCT_STATE_FAILED (1 << 26)
165
166/* Technology enabled indicator */
167#define ASLE_TCHE_ALS_EN (1 << 0)
168#define ASLE_TCHE_BLC_EN (1 << 1)
169#define ASLE_TCHE_PFIT_EN (1 << 2)
170#define ASLE_TCHE_PFMB_EN (1 << 3)
171
172/* ASLE backlight brightness to set */
173#define ASLE_BCLP_VALID (1<<31)
174#define ASLE_BCLP_MSK (~(1<<31))
175
176/* ASLE panel fitting request */
177#define ASLE_PFIT_VALID (1<<31)
178#define ASLE_PFIT_CENTER (1<<0)
179#define ASLE_PFIT_STRETCH_TEXT (1<<1)
180#define ASLE_PFIT_STRETCH_GFX (1<<2)
181
182/* PWM frequency and minimum brightness */
183#define ASLE_PFMB_BRIGHTNESS_MASK (0xff)
184#define ASLE_PFMB_BRIGHTNESS_VALID (1<<8)
185#define ASLE_PFMB_PWM_MASK (0x7ffffe00)
186#define ASLE_PFMB_PWM_VALID (1<<31)
187
188#define ASLE_CBLV_VALID (1<<31)
189
190/* IUER */
191#define ASLE_IUER_DOCKING (1 << 7)
192#define ASLE_IUER_CONVERTIBLE (1 << 6)
193#define ASLE_IUER_ROTATION_LOCK_BTN (1 << 4)
194#define ASLE_IUER_VOLUME_DOWN_BTN (1 << 3)
195#define ASLE_IUER_VOLUME_UP_BTN (1 << 2)
196#define ASLE_IUER_WINDOWS_BTN (1 << 1)
197#define ASLE_IUER_POWER_BTN (1 << 0)
198
199/* Software System Control Interrupt (SWSCI) */
200#define SWSCI_SCIC_INDICATOR (1 << 0)
201#define SWSCI_SCIC_MAIN_FUNCTION_SHIFT 1
202#define SWSCI_SCIC_MAIN_FUNCTION_MASK (0xf << 1)
203#define SWSCI_SCIC_SUB_FUNCTION_SHIFT 8
204#define SWSCI_SCIC_SUB_FUNCTION_MASK (0xff << 8)
205#define SWSCI_SCIC_EXIT_PARAMETER_SHIFT 8
206#define SWSCI_SCIC_EXIT_PARAMETER_MASK (0xff << 8)
207#define SWSCI_SCIC_EXIT_STATUS_SHIFT 5
208#define SWSCI_SCIC_EXIT_STATUS_MASK (7 << 5)
209#define SWSCI_SCIC_EXIT_STATUS_SUCCESS 1
210
211#define SWSCI_FUNCTION_CODE(main, sub) \
212 ((main) << SWSCI_SCIC_MAIN_FUNCTION_SHIFT | \
213 (sub) << SWSCI_SCIC_SUB_FUNCTION_SHIFT)
214
215/* SWSCI: Get BIOS Data (GBDA) */
216#define SWSCI_GBDA 4
217#define SWSCI_GBDA_SUPPORTED_CALLS SWSCI_FUNCTION_CODE(SWSCI_GBDA, 0)
218#define SWSCI_GBDA_REQUESTED_CALLBACKS SWSCI_FUNCTION_CODE(SWSCI_GBDA, 1)
219#define SWSCI_GBDA_BOOT_DISPLAY_PREF SWSCI_FUNCTION_CODE(SWSCI_GBDA, 4)
220#define SWSCI_GBDA_PANEL_DETAILS SWSCI_FUNCTION_CODE(SWSCI_GBDA, 5)
221#define SWSCI_GBDA_TV_STANDARD SWSCI_FUNCTION_CODE(SWSCI_GBDA, 6)
222#define SWSCI_GBDA_INTERNAL_GRAPHICS SWSCI_FUNCTION_CODE(SWSCI_GBDA, 7)
223#define SWSCI_GBDA_SPREAD_SPECTRUM SWSCI_FUNCTION_CODE(SWSCI_GBDA, 10)
224
225/* SWSCI: System BIOS Callbacks (SBCB) */
226#define SWSCI_SBCB 6
227#define SWSCI_SBCB_SUPPORTED_CALLBACKS SWSCI_FUNCTION_CODE(SWSCI_SBCB, 0)
228#define SWSCI_SBCB_INIT_COMPLETION SWSCI_FUNCTION_CODE(SWSCI_SBCB, 1)
229#define SWSCI_SBCB_PRE_HIRES_SET_MODE SWSCI_FUNCTION_CODE(SWSCI_SBCB, 3)
230#define SWSCI_SBCB_POST_HIRES_SET_MODE SWSCI_FUNCTION_CODE(SWSCI_SBCB, 4)
231#define SWSCI_SBCB_DISPLAY_SWITCH SWSCI_FUNCTION_CODE(SWSCI_SBCB, 5)
232#define SWSCI_SBCB_SET_TV_FORMAT SWSCI_FUNCTION_CODE(SWSCI_SBCB, 6)
233#define SWSCI_SBCB_ADAPTER_POWER_STATE SWSCI_FUNCTION_CODE(SWSCI_SBCB, 7)
234#define SWSCI_SBCB_DISPLAY_POWER_STATE SWSCI_FUNCTION_CODE(SWSCI_SBCB, 8)
235#define SWSCI_SBCB_SET_BOOT_DISPLAY SWSCI_FUNCTION_CODE(SWSCI_SBCB, 9)
236#define SWSCI_SBCB_SET_PANEL_DETAILS SWSCI_FUNCTION_CODE(SWSCI_SBCB, 10)
237#define SWSCI_SBCB_SET_INTERNAL_GFX SWSCI_FUNCTION_CODE(SWSCI_SBCB, 11)
238#define SWSCI_SBCB_POST_HIRES_TO_DOS_FS SWSCI_FUNCTION_CODE(SWSCI_SBCB, 16)
239#define SWSCI_SBCB_SUSPEND_RESUME SWSCI_FUNCTION_CODE(SWSCI_SBCB, 17)
240#define SWSCI_SBCB_SET_SPREAD_SPECTRUM SWSCI_FUNCTION_CODE(SWSCI_SBCB, 18)
241#define SWSCI_SBCB_POST_VBE_PM SWSCI_FUNCTION_CODE(SWSCI_SBCB, 19)
242#define SWSCI_SBCB_ENABLE_DISABLE_AUDIO SWSCI_FUNCTION_CODE(SWSCI_SBCB, 21)
243
244#define MAX_DSLP 1500
245
246static int swsci(struct drm_i915_private *dev_priv,
247 u32 function, u32 parm, u32 *parm_out)
248{
249 struct opregion_swsci *swsci = dev_priv->opregion.swsci;
250 struct pci_dev *pdev = dev_priv->drm.pdev;
251 u32 main_function, sub_function, scic;
252 u16 swsci_val;
253 u32 dslp;
254
255 if (!swsci)
256 return -ENODEV;
257
258 main_function = (function & SWSCI_SCIC_MAIN_FUNCTION_MASK) >>
259 SWSCI_SCIC_MAIN_FUNCTION_SHIFT;
260 sub_function = (function & SWSCI_SCIC_SUB_FUNCTION_MASK) >>
261 SWSCI_SCIC_SUB_FUNCTION_SHIFT;
262
263 /* Check if we can call the function. See swsci_setup for details. */
264 if (main_function == SWSCI_SBCB) {
265 if ((dev_priv->opregion.swsci_sbcb_sub_functions &
266 (1 << sub_function)) == 0)
267 return -EINVAL;
268 } else if (main_function == SWSCI_GBDA) {
269 if ((dev_priv->opregion.swsci_gbda_sub_functions &
270 (1 << sub_function)) == 0)
271 return -EINVAL;
272 }
273
274 /* Driver sleep timeout in ms. */
275 dslp = swsci->dslp;
276 if (!dslp) {
277 /* The spec says 2ms should be the default, but it's too small
278 * for some machines. */
279 dslp = 50;
280 } else if (dslp > MAX_DSLP) {
281 /* Hey bios, trust must be earned. */
282 DRM_INFO_ONCE("ACPI BIOS requests an excessive sleep of %u ms, "
283 "using %u ms instead\n", dslp, MAX_DSLP);
284 dslp = MAX_DSLP;
285 }
286
287 /* The spec tells us to do this, but we are the only user... */
288 scic = swsci->scic;
289 if (scic & SWSCI_SCIC_INDICATOR) {
290 drm_dbg(&dev_priv->drm, "SWSCI request already in progress\n");
291 return -EBUSY;
292 }
293
294 scic = function | SWSCI_SCIC_INDICATOR;
295
296 swsci->parm = parm;
297 swsci->scic = scic;
298
299 /* Ensure SCI event is selected and event trigger is cleared. */
300 pci_read_config_word(pdev, SWSCI, &swsci_val);
301 if (!(swsci_val & SWSCI_SCISEL) || (swsci_val & SWSCI_GSSCIE)) {
302 swsci_val |= SWSCI_SCISEL;
303 swsci_val &= ~SWSCI_GSSCIE;
304 pci_write_config_word(pdev, SWSCI, swsci_val);
305 }
306
307 /* Use event trigger to tell bios to check the mail. */
308 swsci_val |= SWSCI_GSSCIE;
309 pci_write_config_word(pdev, SWSCI, swsci_val);
310
311 /* Poll for the result. */
312#define C (((scic = swsci->scic) & SWSCI_SCIC_INDICATOR) == 0)
313 if (wait_for(C, dslp)) {
314 drm_dbg(&dev_priv->drm, "SWSCI request timed out\n");
315 return -ETIMEDOUT;
316 }
317
318 scic = (scic & SWSCI_SCIC_EXIT_STATUS_MASK) >>
319 SWSCI_SCIC_EXIT_STATUS_SHIFT;
320
321 /* Note: scic == 0 is an error! */
322 if (scic != SWSCI_SCIC_EXIT_STATUS_SUCCESS) {
323 drm_dbg(&dev_priv->drm, "SWSCI request error %u\n", scic);
324 return -EIO;
325 }
326
327 if (parm_out)
328 *parm_out = swsci->parm;
329
330 return 0;
331
332#undef C
333}
334
335#define DISPLAY_TYPE_CRT 0
336#define DISPLAY_TYPE_TV 1
337#define DISPLAY_TYPE_EXTERNAL_FLAT_PANEL 2
338#define DISPLAY_TYPE_INTERNAL_FLAT_PANEL 3
339
340int intel_opregion_notify_encoder(struct intel_encoder *intel_encoder,
341 bool enable)
342{
343 struct drm_i915_private *dev_priv = to_i915(intel_encoder->base.dev);
344 u32 parm = 0;
345 u32 type = 0;
346 u32 port;
347
348 /* don't care about old stuff for now */
349 if (!HAS_DDI(dev_priv))
350 return 0;
351
352 if (intel_encoder->type == INTEL_OUTPUT_DSI)
353 port = 0;
354 else
355 port = intel_encoder->port;
356
357 if (port == PORT_E) {
358 port = 0;
359 } else {
360 parm |= 1 << port;
361 port++;
362 }
363
364 if (!enable)
365 parm |= 4 << 8;
366
367 switch (intel_encoder->type) {
368 case INTEL_OUTPUT_ANALOG:
369 type = DISPLAY_TYPE_CRT;
370 break;
371 case INTEL_OUTPUT_DDI:
372 case INTEL_OUTPUT_DP:
373 case INTEL_OUTPUT_HDMI:
374 case INTEL_OUTPUT_DP_MST:
375 type = DISPLAY_TYPE_EXTERNAL_FLAT_PANEL;
376 break;
377 case INTEL_OUTPUT_EDP:
378 case INTEL_OUTPUT_DSI:
379 type = DISPLAY_TYPE_INTERNAL_FLAT_PANEL;
380 break;
381 default:
382 drm_WARN_ONCE(&dev_priv->drm, 1,
383 "unsupported intel_encoder type %d\n",
384 intel_encoder->type);
385 return -EINVAL;
386 }
387
388 parm |= type << (16 + port * 3);
389
390 return swsci(dev_priv, SWSCI_SBCB_DISPLAY_POWER_STATE, parm, NULL);
391}
392
393static const struct {
394 pci_power_t pci_power_state;
395 u32 parm;
396} power_state_map[] = {
397 { PCI_D0, 0x00 },
398 { PCI_D1, 0x01 },
399 { PCI_D2, 0x02 },
400 { PCI_D3hot, 0x04 },
401 { PCI_D3cold, 0x04 },
402};
403
404int intel_opregion_notify_adapter(struct drm_i915_private *dev_priv,
405 pci_power_t state)
406{
407 int i;
408
409 if (!HAS_DDI(dev_priv))
410 return 0;
411
412 for (i = 0; i < ARRAY_SIZE(power_state_map); i++) {
413 if (state == power_state_map[i].pci_power_state)
414 return swsci(dev_priv, SWSCI_SBCB_ADAPTER_POWER_STATE,
415 power_state_map[i].parm, NULL);
416 }
417
418 return -EINVAL;
419}
420
421static u32 asle_set_backlight(struct drm_i915_private *dev_priv, u32 bclp)
422{
423 struct intel_connector *connector;
424 struct drm_connector_list_iter conn_iter;
425 struct opregion_asle *asle = dev_priv->opregion.asle;
426 struct drm_device *dev = &dev_priv->drm;
427
428 drm_dbg(&dev_priv->drm, "bclp = 0x%08x\n", bclp);
429
430 if (acpi_video_get_backlight_type() == acpi_backlight_native) {
431 drm_dbg_kms(&dev_priv->drm,
432 "opregion backlight request ignored\n");
433 return 0;
434 }
435
436 if (!(bclp & ASLE_BCLP_VALID))
437 return ASLC_BACKLIGHT_FAILED;
438
439 bclp &= ASLE_BCLP_MSK;
440 if (bclp > 255)
441 return ASLC_BACKLIGHT_FAILED;
442
443 drm_modeset_lock(&dev->mode_config.connection_mutex, NULL);
444
445 /*
446 * Update backlight on all connectors that support backlight (usually
447 * only one).
448 */
449 drm_dbg_kms(&dev_priv->drm, "updating opregion backlight %d/255\n",
450 bclp);
451 drm_connector_list_iter_begin(dev, &conn_iter);
452 for_each_intel_connector_iter(connector, &conn_iter)
453 intel_panel_set_backlight_acpi(connector->base.state, bclp, 255);
454 drm_connector_list_iter_end(&conn_iter);
455 asle->cblv = DIV_ROUND_UP(bclp * 100, 255) | ASLE_CBLV_VALID;
456
457 drm_modeset_unlock(&dev->mode_config.connection_mutex);
458
459
460 return 0;
461}
462
463static u32 asle_set_als_illum(struct drm_i915_private *dev_priv, u32 alsi)
464{
465 /* alsi is the current ALS reading in lux. 0 indicates below sensor
466 range, 0xffff indicates above sensor range. 1-0xfffe are valid */
467 drm_dbg(&dev_priv->drm, "Illum is not supported\n");
468 return ASLC_ALS_ILLUM_FAILED;
469}
470
471static u32 asle_set_pwm_freq(struct drm_i915_private *dev_priv, u32 pfmb)
472{
473 drm_dbg(&dev_priv->drm, "PWM freq is not supported\n");
474 return ASLC_PWM_FREQ_FAILED;
475}
476
477static u32 asle_set_pfit(struct drm_i915_private *dev_priv, u32 pfit)
478{
479 /* Panel fitting is currently controlled by the X code, so this is a
480 noop until modesetting support works fully */
481 drm_dbg(&dev_priv->drm, "Pfit is not supported\n");
482 return ASLC_PFIT_FAILED;
483}
484
485static u32 asle_set_supported_rotation_angles(struct drm_i915_private *dev_priv, u32 srot)
486{
487 drm_dbg(&dev_priv->drm, "SROT is not supported\n");
488 return ASLC_ROTATION_ANGLES_FAILED;
489}
490
491static u32 asle_set_button_array(struct drm_i915_private *dev_priv, u32 iuer)
492{
493 if (!iuer)
494 drm_dbg(&dev_priv->drm,
495 "Button array event is not supported (nothing)\n");
496 if (iuer & ASLE_IUER_ROTATION_LOCK_BTN)
497 drm_dbg(&dev_priv->drm,
498 "Button array event is not supported (rotation lock)\n");
499 if (iuer & ASLE_IUER_VOLUME_DOWN_BTN)
500 drm_dbg(&dev_priv->drm,
501 "Button array event is not supported (volume down)\n");
502 if (iuer & ASLE_IUER_VOLUME_UP_BTN)
503 drm_dbg(&dev_priv->drm,
504 "Button array event is not supported (volume up)\n");
505 if (iuer & ASLE_IUER_WINDOWS_BTN)
506 drm_dbg(&dev_priv->drm,
507 "Button array event is not supported (windows)\n");
508 if (iuer & ASLE_IUER_POWER_BTN)
509 drm_dbg(&dev_priv->drm,
510 "Button array event is not supported (power)\n");
511
512 return ASLC_BUTTON_ARRAY_FAILED;
513}
514
515static u32 asle_set_convertible(struct drm_i915_private *dev_priv, u32 iuer)
516{
517 if (iuer & ASLE_IUER_CONVERTIBLE)
518 drm_dbg(&dev_priv->drm,
519 "Convertible is not supported (clamshell)\n");
520 else
521 drm_dbg(&dev_priv->drm,
522 "Convertible is not supported (slate)\n");
523
524 return ASLC_CONVERTIBLE_FAILED;
525}
526
527static u32 asle_set_docking(struct drm_i915_private *dev_priv, u32 iuer)
528{
529 if (iuer & ASLE_IUER_DOCKING)
530 drm_dbg(&dev_priv->drm, "Docking is not supported (docked)\n");
531 else
532 drm_dbg(&dev_priv->drm,
533 "Docking is not supported (undocked)\n");
534
535 return ASLC_DOCKING_FAILED;
536}
537
538static u32 asle_isct_state(struct drm_i915_private *dev_priv)
539{
540 drm_dbg(&dev_priv->drm, "ISCT is not supported\n");
541 return ASLC_ISCT_STATE_FAILED;
542}
543
544static void asle_work(struct work_struct *work)
545{
546 struct intel_opregion *opregion =
547 container_of(work, struct intel_opregion, asle_work);
548 struct drm_i915_private *dev_priv =
549 container_of(opregion, struct drm_i915_private, opregion);
550 struct opregion_asle *asle = dev_priv->opregion.asle;
551 u32 aslc_stat = 0;
552 u32 aslc_req;
553
554 if (!asle)
555 return;
556
557 aslc_req = asle->aslc;
558
559 if (!(aslc_req & ASLC_REQ_MSK)) {
560 drm_dbg(&dev_priv->drm,
561 "No request on ASLC interrupt 0x%08x\n", aslc_req);
562 return;
563 }
564
565 if (aslc_req & ASLC_SET_ALS_ILLUM)
566 aslc_stat |= asle_set_als_illum(dev_priv, asle->alsi);
567
568 if (aslc_req & ASLC_SET_BACKLIGHT)
569 aslc_stat |= asle_set_backlight(dev_priv, asle->bclp);
570
571 if (aslc_req & ASLC_SET_PFIT)
572 aslc_stat |= asle_set_pfit(dev_priv, asle->pfit);
573
574 if (aslc_req & ASLC_SET_PWM_FREQ)
575 aslc_stat |= asle_set_pwm_freq(dev_priv, asle->pfmb);
576
577 if (aslc_req & ASLC_SUPPORTED_ROTATION_ANGLES)
578 aslc_stat |= asle_set_supported_rotation_angles(dev_priv,
579 asle->srot);
580
581 if (aslc_req & ASLC_BUTTON_ARRAY)
582 aslc_stat |= asle_set_button_array(dev_priv, asle->iuer);
583
584 if (aslc_req & ASLC_CONVERTIBLE_INDICATOR)
585 aslc_stat |= asle_set_convertible(dev_priv, asle->iuer);
586
587 if (aslc_req & ASLC_DOCKING_INDICATOR)
588 aslc_stat |= asle_set_docking(dev_priv, asle->iuer);
589
590 if (aslc_req & ASLC_ISCT_STATE_CHANGE)
591 aslc_stat |= asle_isct_state(dev_priv);
592
593 asle->aslc = aslc_stat;
594}
595
596void intel_opregion_asle_intr(struct drm_i915_private *dev_priv)
597{
598 if (dev_priv->opregion.asle)
599 schedule_work(&dev_priv->opregion.asle_work);
600}
601
602#define ACPI_EV_DISPLAY_SWITCH (1<<0)
603#define ACPI_EV_LID (1<<1)
604#define ACPI_EV_DOCK (1<<2)
605
606/*
607 * The only video events relevant to opregion are 0x80. These indicate either a
608 * docking event, lid switch or display switch request. In Linux, these are
609 * handled by the dock, button and video drivers.
610 */
611static int intel_opregion_video_event(struct notifier_block *nb,
612 unsigned long val, void *data)
613{
614 struct intel_opregion *opregion = container_of(nb, struct intel_opregion,
615 acpi_notifier);
616 struct acpi_bus_event *event = data;
617 struct opregion_acpi *acpi;
618 int ret = NOTIFY_OK;
619
620 if (strcmp(event->device_class, ACPI_VIDEO_CLASS) != 0)
621 return NOTIFY_DONE;
622
623 acpi = opregion->acpi;
624
625 if (event->type == 0x80 && ((acpi->cevt & 1) == 0))
626 ret = NOTIFY_BAD;
627
628 acpi->csts = 0;
629
630 return ret;
631}
632
633/*
634 * Initialise the DIDL field in opregion. This passes a list of devices to
635 * the firmware. Values are defined by section B.4.2 of the ACPI specification
636 * (version 3)
637 */
638
639static void set_did(struct intel_opregion *opregion, int i, u32 val)
640{
641 if (i < ARRAY_SIZE(opregion->acpi->didl)) {
642 opregion->acpi->didl[i] = val;
643 } else {
644 i -= ARRAY_SIZE(opregion->acpi->didl);
645
646 if (WARN_ON(i >= ARRAY_SIZE(opregion->acpi->did2)))
647 return;
648
649 opregion->acpi->did2[i] = val;
650 }
651}
652
653static void intel_didl_outputs(struct drm_i915_private *dev_priv)
654{
655 struct intel_opregion *opregion = &dev_priv->opregion;
656 struct intel_connector *connector;
657 struct drm_connector_list_iter conn_iter;
658 int i = 0, max_outputs;
659
660 /*
661 * In theory, did2, the extended didl, gets added at opregion version
662 * 3.0. In practice, however, we're supposed to set it for earlier
663 * versions as well, since a BIOS that doesn't understand did2 should
664 * not look at it anyway. Use a variable so we can tweak this if a need
665 * arises later.
666 */
667 max_outputs = ARRAY_SIZE(opregion->acpi->didl) +
668 ARRAY_SIZE(opregion->acpi->did2);
669
670 intel_acpi_device_id_update(dev_priv);
671
672 drm_connector_list_iter_begin(&dev_priv->drm, &conn_iter);
673 for_each_intel_connector_iter(connector, &conn_iter) {
674 if (i < max_outputs)
675 set_did(opregion, i, connector->acpi_device_id);
676 i++;
677 }
678 drm_connector_list_iter_end(&conn_iter);
679
680 drm_dbg_kms(&dev_priv->drm, "%d outputs detected\n", i);
681
682 if (i > max_outputs)
683 drm_err(&dev_priv->drm,
684 "More than %d outputs in connector list\n",
685 max_outputs);
686
687 /* If fewer than max outputs, the list must be null terminated */
688 if (i < max_outputs)
689 set_did(opregion, i, 0);
690}
691
692static void intel_setup_cadls(struct drm_i915_private *dev_priv)
693{
694 struct intel_opregion *opregion = &dev_priv->opregion;
695 struct intel_connector *connector;
696 struct drm_connector_list_iter conn_iter;
697 int i = 0;
698
699 /*
700 * Initialize the CADL field from the connector device ids. This is
701 * essentially the same as copying from the DIDL. Technically, this is
702 * not always correct as display outputs may exist, but not active. This
703 * initialization is necessary for some Clevo laptops that check this
704 * field before processing the brightness and display switching hotkeys.
705 *
706 * Note that internal panels should be at the front of the connector
707 * list already, ensuring they're not left out.
708 */
709 drm_connector_list_iter_begin(&dev_priv->drm, &conn_iter);
710 for_each_intel_connector_iter(connector, &conn_iter) {
711 if (i >= ARRAY_SIZE(opregion->acpi->cadl))
712 break;
713 opregion->acpi->cadl[i++] = connector->acpi_device_id;
714 }
715 drm_connector_list_iter_end(&conn_iter);
716
717 /* If fewer than 8 active devices, the list must be null terminated */
718 if (i < ARRAY_SIZE(opregion->acpi->cadl))
719 opregion->acpi->cadl[i] = 0;
720}
721
722static void swsci_setup(struct drm_i915_private *dev_priv)
723{
724 struct intel_opregion *opregion = &dev_priv->opregion;
725 bool requested_callbacks = false;
726 u32 tmp;
727
728 /* Sub-function code 0 is okay, let's allow them. */
729 opregion->swsci_gbda_sub_functions = 1;
730 opregion->swsci_sbcb_sub_functions = 1;
731
732 /* We use GBDA to ask for supported GBDA calls. */
733 if (swsci(dev_priv, SWSCI_GBDA_SUPPORTED_CALLS, 0, &tmp) == 0) {
734 /* make the bits match the sub-function codes */
735 tmp <<= 1;
736 opregion->swsci_gbda_sub_functions |= tmp;
737 }
738
739 /*
740 * We also use GBDA to ask for _requested_ SBCB callbacks. The driver
741 * must not call interfaces that are not specifically requested by the
742 * bios.
743 */
744 if (swsci(dev_priv, SWSCI_GBDA_REQUESTED_CALLBACKS, 0, &tmp) == 0) {
745 /* here, the bits already match sub-function codes */
746 opregion->swsci_sbcb_sub_functions |= tmp;
747 requested_callbacks = true;
748 }
749
750 /*
751 * But we use SBCB to ask for _supported_ SBCB calls. This does not mean
752 * the callback is _requested_. But we still can't call interfaces that
753 * are not requested.
754 */
755 if (swsci(dev_priv, SWSCI_SBCB_SUPPORTED_CALLBACKS, 0, &tmp) == 0) {
756 /* make the bits match the sub-function codes */
757 u32 low = tmp & 0x7ff;
758 u32 high = tmp & ~0xfff; /* bit 11 is reserved */
759 tmp = (high << 4) | (low << 1) | 1;
760
761 /* best guess what to do with supported wrt requested */
762 if (requested_callbacks) {
763 u32 req = opregion->swsci_sbcb_sub_functions;
764 if ((req & tmp) != req)
765 drm_dbg(&dev_priv->drm,
766 "SWSCI BIOS requested (%08x) SBCB callbacks that are not supported (%08x)\n",
767 req, tmp);
768 /* XXX: for now, trust the requested callbacks */
769 /* opregion->swsci_sbcb_sub_functions &= tmp; */
770 } else {
771 opregion->swsci_sbcb_sub_functions |= tmp;
772 }
773 }
774
775 drm_dbg(&dev_priv->drm,
776 "SWSCI GBDA callbacks %08x, SBCB callbacks %08x\n",
777 opregion->swsci_gbda_sub_functions,
778 opregion->swsci_sbcb_sub_functions);
779}
780
781static int intel_no_opregion_vbt_callback(const struct dmi_system_id *id)
782{
783 DRM_DEBUG_KMS("Falling back to manually reading VBT from "
784 "VBIOS ROM for %s\n", id->ident);
785 return 1;
786}
787
788static const struct dmi_system_id intel_no_opregion_vbt[] = {
789 {
790 .callback = intel_no_opregion_vbt_callback,
791 .ident = "ThinkCentre A57",
792 .matches = {
793 DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
794 DMI_MATCH(DMI_PRODUCT_NAME, "97027RG"),
795 },
796 },
797 { }
798};
799
800static int intel_load_vbt_firmware(struct drm_i915_private *dev_priv)
801{
802 struct intel_opregion *opregion = &dev_priv->opregion;
803 const struct firmware *fw = NULL;
804 const char *name = dev_priv->params.vbt_firmware;
805 int ret;
806
807 if (!name || !*name)
808 return -ENOENT;
809
810 ret = request_firmware(&fw, name, &dev_priv->drm.pdev->dev);
811 if (ret) {
812 drm_err(&dev_priv->drm,
813 "Requesting VBT firmware \"%s\" failed (%d)\n",
814 name, ret);
815 return ret;
816 }
817
818 if (intel_bios_is_valid_vbt(fw->data, fw->size)) {
819 opregion->vbt_firmware = kmemdup(fw->data, fw->size, GFP_KERNEL);
820 if (opregion->vbt_firmware) {
821 drm_dbg_kms(&dev_priv->drm,
822 "Found valid VBT firmware \"%s\"\n", name);
823 opregion->vbt = opregion->vbt_firmware;
824 opregion->vbt_size = fw->size;
825 ret = 0;
826 } else {
827 ret = -ENOMEM;
828 }
829 } else {
830 drm_dbg_kms(&dev_priv->drm, "Invalid VBT firmware \"%s\"\n",
831 name);
832 ret = -EINVAL;
833 }
834
835 release_firmware(fw);
836
837 return ret;
838}
839
840int intel_opregion_setup(struct drm_i915_private *dev_priv)
841{
842 struct intel_opregion *opregion = &dev_priv->opregion;
843 struct pci_dev *pdev = dev_priv->drm.pdev;
844 u32 asls, mboxes;
845 char buf[sizeof(OPREGION_SIGNATURE)];
846 int err = 0;
847 void *base;
848 const void *vbt;
849 u32 vbt_size;
850
851 BUILD_BUG_ON(sizeof(struct opregion_header) != 0x100);
852 BUILD_BUG_ON(sizeof(struct opregion_acpi) != 0x100);
853 BUILD_BUG_ON(sizeof(struct opregion_swsci) != 0x100);
854 BUILD_BUG_ON(sizeof(struct opregion_asle) != 0x100);
855 BUILD_BUG_ON(sizeof(struct opregion_asle_ext) != 0x400);
856
857 pci_read_config_dword(pdev, ASLS, &asls);
858 drm_dbg(&dev_priv->drm, "graphic opregion physical addr: 0x%x\n",
859 asls);
860 if (asls == 0) {
861 drm_dbg(&dev_priv->drm, "ACPI OpRegion not supported!\n");
862 return -ENOTSUPP;
863 }
864
865 INIT_WORK(&opregion->asle_work, asle_work);
866
867 base = memremap(asls, OPREGION_SIZE, MEMREMAP_WB);
868 if (!base)
869 return -ENOMEM;
870
871 memcpy(buf, base, sizeof(buf));
872
873 if (memcmp(buf, OPREGION_SIGNATURE, 16)) {
874 drm_dbg(&dev_priv->drm, "opregion signature mismatch\n");
875 err = -EINVAL;
876 goto err_out;
877 }
878 opregion->header = base;
879 opregion->lid_state = base + ACPI_CLID;
880
881 drm_dbg(&dev_priv->drm, "ACPI OpRegion version %u.%u.%u\n",
882 opregion->header->over.major,
883 opregion->header->over.minor,
884 opregion->header->over.revision);
885
886 mboxes = opregion->header->mboxes;
887 if (mboxes & MBOX_ACPI) {
888 drm_dbg(&dev_priv->drm, "Public ACPI methods supported\n");
889 opregion->acpi = base + OPREGION_ACPI_OFFSET;
890 /*
891 * Indicate we handle monitor hotplug events ourselves so we do
892 * not need ACPI notifications for them. Disabling these avoids
893 * triggering the AML code doing the notifation, which may be
894 * broken as Windows also seems to disable these.
895 */
896 opregion->acpi->chpd = 1;
897 }
898
899 if (mboxes & MBOX_SWSCI) {
900 drm_dbg(&dev_priv->drm, "SWSCI supported\n");
901 opregion->swsci = base + OPREGION_SWSCI_OFFSET;
902 swsci_setup(dev_priv);
903 }
904
905 if (mboxes & MBOX_ASLE) {
906 drm_dbg(&dev_priv->drm, "ASLE supported\n");
907 opregion->asle = base + OPREGION_ASLE_OFFSET;
908
909 opregion->asle->ardy = ASLE_ARDY_NOT_READY;
910 }
911
912 if (mboxes & MBOX_ASLE_EXT)
913 drm_dbg(&dev_priv->drm, "ASLE extension supported\n");
914
915 if (intel_load_vbt_firmware(dev_priv) == 0)
916 goto out;
917
918 if (dmi_check_system(intel_no_opregion_vbt))
919 goto out;
920
921 if (opregion->header->over.major >= 2 && opregion->asle &&
922 opregion->asle->rvda && opregion->asle->rvds) {
923 resource_size_t rvda = opregion->asle->rvda;
924
925 /*
926 * opregion 2.0: rvda is the physical VBT address.
927 *
928 * opregion 2.1+: rvda is unsigned, relative offset from
929 * opregion base, and should never point within opregion.
930 */
931 if (opregion->header->over.major > 2 ||
932 opregion->header->over.minor >= 1) {
933 drm_WARN_ON(&dev_priv->drm, rvda < OPREGION_SIZE);
934
935 rvda += asls;
936 }
937
938 opregion->rvda = memremap(rvda, opregion->asle->rvds,
939 MEMREMAP_WB);
940
941 vbt = opregion->rvda;
942 vbt_size = opregion->asle->rvds;
943 if (intel_bios_is_valid_vbt(vbt, vbt_size)) {
944 drm_dbg_kms(&dev_priv->drm,
945 "Found valid VBT in ACPI OpRegion (RVDA)\n");
946 opregion->vbt = vbt;
947 opregion->vbt_size = vbt_size;
948 goto out;
949 } else {
950 drm_dbg_kms(&dev_priv->drm,
951 "Invalid VBT in ACPI OpRegion (RVDA)\n");
952 memunmap(opregion->rvda);
953 opregion->rvda = NULL;
954 }
955 }
956
957 vbt = base + OPREGION_VBT_OFFSET;
958 /*
959 * The VBT specification says that if the ASLE ext mailbox is not used
960 * its area is reserved, but on some CHT boards the VBT extends into the
961 * ASLE ext area. Allow this even though it is against the spec, so we
962 * do not end up rejecting the VBT on those boards (and end up not
963 * finding the LCD panel because of this).
964 */
965 vbt_size = (mboxes & MBOX_ASLE_EXT) ?
966 OPREGION_ASLE_EXT_OFFSET : OPREGION_SIZE;
967 vbt_size -= OPREGION_VBT_OFFSET;
968 if (intel_bios_is_valid_vbt(vbt, vbt_size)) {
969 drm_dbg_kms(&dev_priv->drm,
970 "Found valid VBT in ACPI OpRegion (Mailbox #4)\n");
971 opregion->vbt = vbt;
972 opregion->vbt_size = vbt_size;
973 } else {
974 drm_dbg_kms(&dev_priv->drm,
975 "Invalid VBT in ACPI OpRegion (Mailbox #4)\n");
976 }
977
978out:
979 return 0;
980
981err_out:
982 memunmap(base);
983 return err;
984}
985
986static int intel_use_opregion_panel_type_callback(const struct dmi_system_id *id)
987{
988 DRM_INFO("Using panel type from OpRegion on %s\n", id->ident);
989 return 1;
990}
991
992static const struct dmi_system_id intel_use_opregion_panel_type[] = {
993 {
994 .callback = intel_use_opregion_panel_type_callback,
995 .ident = "Conrac GmbH IX45GM2",
996 .matches = {DMI_MATCH(DMI_SYS_VENDOR, "Conrac GmbH"),
997 DMI_MATCH(DMI_PRODUCT_NAME, "IX45GM2"),
998 },
999 },
1000 { }
1001};
1002
1003int
1004intel_opregion_get_panel_type(struct drm_i915_private *dev_priv)
1005{
1006 u32 panel_details;
1007 int ret;
1008
1009 ret = swsci(dev_priv, SWSCI_GBDA_PANEL_DETAILS, 0x0, &panel_details);
1010 if (ret) {
1011 drm_dbg_kms(&dev_priv->drm,
1012 "Failed to get panel details from OpRegion (%d)\n",
1013 ret);
1014 return ret;
1015 }
1016
1017 ret = (panel_details >> 8) & 0xff;
1018 if (ret > 0x10) {
1019 drm_dbg_kms(&dev_priv->drm,
1020 "Invalid OpRegion panel type 0x%x\n", ret);
1021 return -EINVAL;
1022 }
1023
1024 /* fall back to VBT panel type? */
1025 if (ret == 0x0) {
1026 drm_dbg_kms(&dev_priv->drm, "No panel type in OpRegion\n");
1027 return -ENODEV;
1028 }
1029
1030 /*
1031 * So far we know that some machined must use it, others must not use it.
1032 * There doesn't seem to be any way to determine which way to go, except
1033 * via a quirk list :(
1034 */
1035 if (!dmi_check_system(intel_use_opregion_panel_type)) {
1036 drm_dbg_kms(&dev_priv->drm,
1037 "Ignoring OpRegion panel type (%d)\n", ret - 1);
1038 return -ENODEV;
1039 }
1040
1041 return ret - 1;
1042}
1043
1044void intel_opregion_register(struct drm_i915_private *i915)
1045{
1046 struct intel_opregion *opregion = &i915->opregion;
1047
1048 if (!opregion->header)
1049 return;
1050
1051 if (opregion->acpi) {
1052 opregion->acpi_notifier.notifier_call =
1053 intel_opregion_video_event;
1054 register_acpi_notifier(&opregion->acpi_notifier);
1055 }
1056
1057 intel_opregion_resume(i915);
1058}
1059
1060void intel_opregion_resume(struct drm_i915_private *i915)
1061{
1062 struct intel_opregion *opregion = &i915->opregion;
1063
1064 if (!opregion->header)
1065 return;
1066
1067 if (opregion->acpi) {
1068 intel_didl_outputs(i915);
1069 intel_setup_cadls(i915);
1070
1071 /*
1072 * Notify BIOS we are ready to handle ACPI video ext notifs.
1073 * Right now, all the events are handled by the ACPI video
1074 * module. We don't actually need to do anything with them.
1075 */
1076 opregion->acpi->csts = 0;
1077 opregion->acpi->drdy = 1;
1078 }
1079
1080 if (opregion->asle) {
1081 opregion->asle->tche = ASLE_TCHE_BLC_EN;
1082 opregion->asle->ardy = ASLE_ARDY_READY;
1083 }
1084
1085 intel_opregion_notify_adapter(i915, PCI_D0);
1086}
1087
1088void intel_opregion_suspend(struct drm_i915_private *i915, pci_power_t state)
1089{
1090 struct intel_opregion *opregion = &i915->opregion;
1091
1092 if (!opregion->header)
1093 return;
1094
1095 intel_opregion_notify_adapter(i915, state);
1096
1097 if (opregion->asle)
1098 opregion->asle->ardy = ASLE_ARDY_NOT_READY;
1099
1100 cancel_work_sync(&i915->opregion.asle_work);
1101
1102 if (opregion->acpi)
1103 opregion->acpi->drdy = 0;
1104}
1105
1106void intel_opregion_unregister(struct drm_i915_private *i915)
1107{
1108 struct intel_opregion *opregion = &i915->opregion;
1109
1110 intel_opregion_suspend(i915, PCI_D1);
1111
1112 if (!opregion->header)
1113 return;
1114
1115 if (opregion->acpi_notifier.notifier_call) {
1116 unregister_acpi_notifier(&opregion->acpi_notifier);
1117 opregion->acpi_notifier.notifier_call = NULL;
1118 }
1119
1120 /* just clear all opregion memory pointers now */
1121 memunmap(opregion->header);
1122 if (opregion->rvda) {
1123 memunmap(opregion->rvda);
1124 opregion->rvda = NULL;
1125 }
1126 if (opregion->vbt_firmware) {
1127 kfree(opregion->vbt_firmware);
1128 opregion->vbt_firmware = NULL;
1129 }
1130 opregion->header = NULL;
1131 opregion->acpi = NULL;
1132 opregion->swsci = NULL;
1133 opregion->asle = NULL;
1134 opregion->vbt = NULL;
1135 opregion->lid_state = NULL;
1136}