1 /* $NetBSD: intel_opregion.c,v 1.6 2022/02/27 21:22:01 riastradh Exp $ */
2
3 /*
4 * Copyright 2008 Intel Corporation <hong.liu@intel.com>
5 * Copyright 2008 Red Hat <mjg@redhat.com>
6 *
7 * Permission is hereby granted, free of charge, to any person obtaining
8 * a copy of this software and associated documentation files (the
9 * "Software"), to deal in the Software without restriction, including
10 * without limitation the rights to use, copy, modify, merge, publish,
11 * distribute, sub license, and/or sell copies of the Software, and to
12 * permit persons to whom the Software is furnished to do so, subject to
13 * the following conditions:
14 *
15 * The above copyright notice and this permission notice (including the
16 * next paragraph) shall be included in all copies or substantial
17 * portions of the Software.
18 *
19 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
20 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
21 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
22 * NON-INFRINGEMENT. IN NO EVENT SHALL INTEL AND/OR ITS SUPPLIERS BE
23 * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
24 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
25 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
26 * SOFTWARE.
27 *
28 */
29
30 #include <sys/cdefs.h>
31 __KERNEL_RCSID(0, "$NetBSD: intel_opregion.c,v 1.6 2022/02/27 21:22:01 riastradh Exp $");
32
33 #ifdef __NetBSD__
34 #include <dev/acpi/acpi_display.h>
35 #endif
36
37 #include <linux/acpi.h>
38 #include <linux/dmi.h>
39 #include <linux/firmware.h>
40 #include <acpi/video.h>
41
42 #include <drm/i915_drm.h>
43
44 #include "display/intel_panel.h"
45
46 #include "i915_drv.h"
47 #include "intel_display_types.h"
48 #include "intel_opregion.h"
49
50 #define OPREGION_HEADER_OFFSET 0
51 #define OPREGION_ACPI_OFFSET 0x100
52 #define ACPI_CLID 0x01ac /* current lid state indicator */
53 #define ACPI_CDCK 0x01b0 /* current docking state indicator */
54 #define OPREGION_SWSCI_OFFSET 0x200
55 #define OPREGION_ASLE_OFFSET 0x300
56 #define OPREGION_VBT_OFFSET 0x400
57 #define OPREGION_ASLE_EXT_OFFSET 0x1C00
58
59 #define OPREGION_SIGNATURE "IntelGraphicsMem"
60 #define MBOX_ACPI (1<<0)
61 #define MBOX_SWSCI (1<<1)
62 #define MBOX_ASLE (1<<2)
63 #define MBOX_ASLE_EXT (1<<4)
64
65 struct opregion_header {
66 u8 signature[16];
67 u32 size;
68 struct {
69 u8 rsvd;
70 u8 revision;
71 u8 minor;
72 u8 major;
73 } __packed over;
74 u8 bios_ver[32];
75 u8 vbios_ver[16];
76 u8 driver_ver[16];
77 u32 mboxes;
78 u32 driver_model;
79 u32 pcon;
80 u8 dver[32];
81 u8 rsvd[124];
82 } __packed;
83
84 /* OpRegion mailbox #1: public ACPI methods */
85 struct opregion_acpi {
86 u32 drdy; /* driver readiness */
87 u32 csts; /* notification status */
88 u32 cevt; /* current event */
89 u8 rsvd1[20];
90 u32 didl[8]; /* supported display devices ID list */
91 u32 cpdl[8]; /* currently presented display list */
92 u32 cadl[8]; /* currently active display list */
93 u32 nadl[8]; /* next active devices list */
94 u32 aslp; /* ASL sleep time-out */
95 u32 tidx; /* toggle table index */
96 u32 chpd; /* current hotplug enable indicator */
97 u32 clid; /* current lid state*/
98 u32 cdck; /* current docking state */
99 u32 sxsw; /* Sx state resume */
100 u32 evts; /* ASL supported events */
101 u32 cnot; /* current OS notification */
102 u32 nrdy; /* driver status */
103 u32 did2[7]; /* extended supported display devices ID list */
104 u32 cpd2[7]; /* extended attached display devices list */
105 u8 rsvd2[4];
106 } __packed;
107
108 /* OpRegion mailbox #2: SWSCI */
109 struct opregion_swsci {
110 u32 scic; /* SWSCI command|status|data */
111 u32 parm; /* command parameters */
112 u32 dslp; /* driver sleep time-out */
113 u8 rsvd[244];
114 } __packed;
115
116 /* OpRegion mailbox #3: ASLE */
117 struct opregion_asle {
118 u32 ardy; /* driver readiness */
119 u32 aslc; /* ASLE interrupt command */
120 u32 tche; /* technology enabled indicator */
121 u32 alsi; /* current ALS illuminance reading */
122 u32 bclp; /* backlight brightness to set */
123 u32 pfit; /* panel fitting state */
124 u32 cblv; /* current brightness level */
125 u16 bclm[20]; /* backlight level duty cycle mapping table */
126 u32 cpfm; /* current panel fitting mode */
127 u32 epfm; /* enabled panel fitting modes */
128 u8 plut[74]; /* panel LUT and identifier */
129 u32 pfmb; /* PWM freq and min brightness */
130 u32 cddv; /* color correction default values */
131 u32 pcft; /* power conservation features */
132 u32 srot; /* supported rotation angles */
133 u32 iuer; /* IUER events */
134 u64 fdss;
135 u32 fdsp;
136 u32 stat;
137 u64 rvda; /* Physical (2.0) or relative from opregion (2.1+)
138 * address of raw VBT data. */
139 u32 rvds; /* Size of raw vbt data */
140 u8 rsvd[58];
141 } __packed;
142
143 /* OpRegion mailbox #5: ASLE ext */
144 struct opregion_asle_ext {
145 u32 phed; /* Panel Header */
146 u8 bddc[256]; /* Panel EDID */
147 u8 rsvd[764];
148 } __packed;
149
150 /* Driver readiness indicator */
151 #define ASLE_ARDY_READY (1 << 0)
152 #define ASLE_ARDY_NOT_READY (0 << 0)
153
154 /* ASLE Interrupt Command (ASLC) bits */
155 #define ASLC_SET_ALS_ILLUM (1 << 0)
156 #define ASLC_SET_BACKLIGHT (1 << 1)
157 #define ASLC_SET_PFIT (1 << 2)
158 #define ASLC_SET_PWM_FREQ (1 << 3)
159 #define ASLC_SUPPORTED_ROTATION_ANGLES (1 << 4)
160 #define ASLC_BUTTON_ARRAY (1 << 5)
161 #define ASLC_CONVERTIBLE_INDICATOR (1 << 6)
162 #define ASLC_DOCKING_INDICATOR (1 << 7)
163 #define ASLC_ISCT_STATE_CHANGE (1 << 8)
164 #define ASLC_REQ_MSK 0x1ff
165 /* response bits */
166 #define ASLC_ALS_ILLUM_FAILED (1 << 10)
167 #define ASLC_BACKLIGHT_FAILED (1 << 12)
168 #define ASLC_PFIT_FAILED (1 << 14)
169 #define ASLC_PWM_FREQ_FAILED (1 << 16)
170 #define ASLC_ROTATION_ANGLES_FAILED (1 << 18)
171 #define ASLC_BUTTON_ARRAY_FAILED (1 << 20)
172 #define ASLC_CONVERTIBLE_FAILED (1 << 22)
173 #define ASLC_DOCKING_FAILED (1 << 24)
174 #define ASLC_ISCT_STATE_FAILED (1 << 26)
175
176 /* Technology enabled indicator */
177 #define ASLE_TCHE_ALS_EN (1 << 0)
178 #define ASLE_TCHE_BLC_EN (1 << 1)
179 #define ASLE_TCHE_PFIT_EN (1 << 2)
180 #define ASLE_TCHE_PFMB_EN (1 << 3)
181
182 /* ASLE backlight brightness to set */
183 #define ASLE_BCLP_VALID (1<<31)
184 #define ASLE_BCLP_MSK (~(1<<31))
185
186 /* ASLE panel fitting request */
187 #define ASLE_PFIT_VALID (1<<31)
188 #define ASLE_PFIT_CENTER (1<<0)
189 #define ASLE_PFIT_STRETCH_TEXT (1<<1)
190 #define ASLE_PFIT_STRETCH_GFX (1<<2)
191
192 /* PWM frequency and minimum brightness */
193 #define ASLE_PFMB_BRIGHTNESS_MASK (0xff)
194 #define ASLE_PFMB_BRIGHTNESS_VALID (1<<8)
195 #define ASLE_PFMB_PWM_MASK (0x7ffffe00)
196 #define ASLE_PFMB_PWM_VALID (1<<31)
197
198 #define ASLE_CBLV_VALID (1<<31)
199
200 /* IUER */
201 #define ASLE_IUER_DOCKING (1 << 7)
202 #define ASLE_IUER_CONVERTIBLE (1 << 6)
203 #define ASLE_IUER_ROTATION_LOCK_BTN (1 << 4)
204 #define ASLE_IUER_VOLUME_DOWN_BTN (1 << 3)
205 #define ASLE_IUER_VOLUME_UP_BTN (1 << 2)
206 #define ASLE_IUER_WINDOWS_BTN (1 << 1)
207 #define ASLE_IUER_POWER_BTN (1 << 0)
208
209 /* Software System Control Interrupt (SWSCI) */
210 #define SWSCI_SCIC_INDICATOR (1 << 0)
211 #define SWSCI_SCIC_MAIN_FUNCTION_SHIFT 1
212 #define SWSCI_SCIC_MAIN_FUNCTION_MASK (0xf << 1)
213 #define SWSCI_SCIC_SUB_FUNCTION_SHIFT 8
214 #define SWSCI_SCIC_SUB_FUNCTION_MASK (0xff << 8)
215 #define SWSCI_SCIC_EXIT_PARAMETER_SHIFT 8
216 #define SWSCI_SCIC_EXIT_PARAMETER_MASK (0xff << 8)
217 #define SWSCI_SCIC_EXIT_STATUS_SHIFT 5
218 #define SWSCI_SCIC_EXIT_STATUS_MASK (7 << 5)
219 #define SWSCI_SCIC_EXIT_STATUS_SUCCESS 1
220
221 #define SWSCI_FUNCTION_CODE(main, sub) \
222 ((main) << SWSCI_SCIC_MAIN_FUNCTION_SHIFT | \
223 (sub) << SWSCI_SCIC_SUB_FUNCTION_SHIFT)
224
225 /* SWSCI: Get BIOS Data (GBDA) */
226 #define SWSCI_GBDA 4
227 #define SWSCI_GBDA_SUPPORTED_CALLS SWSCI_FUNCTION_CODE(SWSCI_GBDA, 0)
228 #define SWSCI_GBDA_REQUESTED_CALLBACKS SWSCI_FUNCTION_CODE(SWSCI_GBDA, 1)
229 #define SWSCI_GBDA_BOOT_DISPLAY_PREF SWSCI_FUNCTION_CODE(SWSCI_GBDA, 4)
230 #define SWSCI_GBDA_PANEL_DETAILS SWSCI_FUNCTION_CODE(SWSCI_GBDA, 5)
231 #define SWSCI_GBDA_TV_STANDARD SWSCI_FUNCTION_CODE(SWSCI_GBDA, 6)
232 #define SWSCI_GBDA_INTERNAL_GRAPHICS SWSCI_FUNCTION_CODE(SWSCI_GBDA, 7)
233 #define SWSCI_GBDA_SPREAD_SPECTRUM SWSCI_FUNCTION_CODE(SWSCI_GBDA, 10)
234
235 /* SWSCI: System BIOS Callbacks (SBCB) */
236 #define SWSCI_SBCB 6
237 #define SWSCI_SBCB_SUPPORTED_CALLBACKS SWSCI_FUNCTION_CODE(SWSCI_SBCB, 0)
238 #define SWSCI_SBCB_INIT_COMPLETION SWSCI_FUNCTION_CODE(SWSCI_SBCB, 1)
239 #define SWSCI_SBCB_PRE_HIRES_SET_MODE SWSCI_FUNCTION_CODE(SWSCI_SBCB, 3)
240 #define SWSCI_SBCB_POST_HIRES_SET_MODE SWSCI_FUNCTION_CODE(SWSCI_SBCB, 4)
241 #define SWSCI_SBCB_DISPLAY_SWITCH SWSCI_FUNCTION_CODE(SWSCI_SBCB, 5)
242 #define SWSCI_SBCB_SET_TV_FORMAT SWSCI_FUNCTION_CODE(SWSCI_SBCB, 6)
243 #define SWSCI_SBCB_ADAPTER_POWER_STATE SWSCI_FUNCTION_CODE(SWSCI_SBCB, 7)
244 #define SWSCI_SBCB_DISPLAY_POWER_STATE SWSCI_FUNCTION_CODE(SWSCI_SBCB, 8)
245 #define SWSCI_SBCB_SET_BOOT_DISPLAY SWSCI_FUNCTION_CODE(SWSCI_SBCB, 9)
246 #define SWSCI_SBCB_SET_PANEL_DETAILS SWSCI_FUNCTION_CODE(SWSCI_SBCB, 10)
247 #define SWSCI_SBCB_SET_INTERNAL_GFX SWSCI_FUNCTION_CODE(SWSCI_SBCB, 11)
248 #define SWSCI_SBCB_POST_HIRES_TO_DOS_FS SWSCI_FUNCTION_CODE(SWSCI_SBCB, 16)
249 #define SWSCI_SBCB_SUSPEND_RESUME SWSCI_FUNCTION_CODE(SWSCI_SBCB, 17)
250 #define SWSCI_SBCB_SET_SPREAD_SPECTRUM SWSCI_FUNCTION_CODE(SWSCI_SBCB, 18)
251 #define SWSCI_SBCB_POST_VBE_PM SWSCI_FUNCTION_CODE(SWSCI_SBCB, 19)
252 #define SWSCI_SBCB_ENABLE_DISABLE_AUDIO SWSCI_FUNCTION_CODE(SWSCI_SBCB, 21)
253
254 /*
255 * ACPI Specification, Revision 5.0, Appendix B.3.2 _DOD (Enumerate All Devices
256 * Attached to the Display Adapter).
257 */
258 #define ACPI_DISPLAY_INDEX_SHIFT 0
259 #define ACPI_DISPLAY_INDEX_MASK (0xf << 0)
260 #define ACPI_DISPLAY_PORT_ATTACHMENT_SHIFT 4
261 #define ACPI_DISPLAY_PORT_ATTACHMENT_MASK (0xf << 4)
262 #define ACPI_DISPLAY_TYPE_SHIFT 8
263 #define ACPI_DISPLAY_TYPE_MASK (0xf << 8)
264 #define ACPI_DISPLAY_TYPE_OTHER (0 << 8)
265 #define ACPI_DISPLAY_TYPE_VGA (1 << 8)
266 #define ACPI_DISPLAY_TYPE_TV (2 << 8)
267 #define ACPI_DISPLAY_TYPE_EXTERNAL_DIGITAL (3 << 8)
268 #define ACPI_DISPLAY_TYPE_INTERNAL_DIGITAL (4 << 8)
269 #define ACPI_VENDOR_SPECIFIC_SHIFT 12
270 #define ACPI_VENDOR_SPECIFIC_MASK (0xf << 12)
271 #define ACPI_BIOS_CAN_DETECT (1 << 16)
272 #define ACPI_DEPENDS_ON_VGA (1 << 17)
273 #define ACPI_PIPE_ID_SHIFT 18
274 #define ACPI_PIPE_ID_MASK (7 << 18)
275 #define ACPI_DEVICE_ID_SCHEME (1 << 31)
276
277 #define MAX_DSLP 1500
278
swsci(struct drm_i915_private * dev_priv,u32 function,u32 parm,u32 * parm_out)279 static int swsci(struct drm_i915_private *dev_priv,
280 u32 function, u32 parm, u32 *parm_out)
281 {
282 struct opregion_swsci *swsci = dev_priv->opregion.swsci;
283 struct pci_dev *pdev = dev_priv->drm.pdev;
284 u32 main_function, sub_function, scic;
285 u16 swsci_val;
286 u32 dslp;
287
288 if (!swsci)
289 return -ENODEV;
290
291 main_function = (function & SWSCI_SCIC_MAIN_FUNCTION_MASK) >>
292 SWSCI_SCIC_MAIN_FUNCTION_SHIFT;
293 sub_function = (function & SWSCI_SCIC_SUB_FUNCTION_MASK) >>
294 SWSCI_SCIC_SUB_FUNCTION_SHIFT;
295
296 /* Check if we can call the function. See swsci_setup for details. */
297 if (main_function == SWSCI_SBCB) {
298 if ((dev_priv->opregion.swsci_sbcb_sub_functions &
299 (1 << sub_function)) == 0)
300 return -EINVAL;
301 } else if (main_function == SWSCI_GBDA) {
302 if ((dev_priv->opregion.swsci_gbda_sub_functions &
303 (1 << sub_function)) == 0)
304 return -EINVAL;
305 }
306
307 /* Driver sleep timeout in ms. */
308 dslp = swsci->dslp;
309 if (!dslp) {
310 /* The spec says 2ms should be the default, but it's too small
311 * for some machines. */
312 dslp = 50;
313 } else if (dslp > MAX_DSLP) {
314 /* Hey bios, trust must be earned. */
315 DRM_INFO_ONCE("ACPI BIOS requests an excessive sleep of %u ms, "
316 "using %u ms instead\n", dslp, MAX_DSLP);
317 dslp = MAX_DSLP;
318 }
319
320 /* The spec tells us to do this, but we are the only user... */
321 scic = swsci->scic;
322 if (scic & SWSCI_SCIC_INDICATOR) {
323 DRM_DEBUG_DRIVER("SWSCI request already in progress\n");
324 return -EBUSY;
325 }
326
327 scic = function | SWSCI_SCIC_INDICATOR;
328
329 swsci->parm = parm;
330 swsci->scic = scic;
331
332 /* Ensure SCI event is selected and event trigger is cleared. */
333 pci_read_config_word(pdev, SWSCI, &swsci_val);
334 if (!(swsci_val & SWSCI_SCISEL) || (swsci_val & SWSCI_GSSCIE)) {
335 swsci_val |= SWSCI_SCISEL;
336 swsci_val &= ~SWSCI_GSSCIE;
337 pci_write_config_word(pdev, SWSCI, swsci_val);
338 }
339
340 /* Use event trigger to tell bios to check the mail. */
341 swsci_val |= SWSCI_GSSCIE;
342 pci_write_config_word(pdev, SWSCI, swsci_val);
343
344 /* Poll for the result. */
345 #define C (((scic = swsci->scic) & SWSCI_SCIC_INDICATOR) == 0)
346 if (wait_for(C, dslp)) {
347 DRM_DEBUG_DRIVER("SWSCI request timed out\n");
348 return -ETIMEDOUT;
349 }
350
351 scic = (scic & SWSCI_SCIC_EXIT_STATUS_MASK) >>
352 SWSCI_SCIC_EXIT_STATUS_SHIFT;
353
354 /* Note: scic == 0 is an error! */
355 if (scic != SWSCI_SCIC_EXIT_STATUS_SUCCESS) {
356 DRM_DEBUG_DRIVER("SWSCI request error %u\n", scic);
357 return -EIO;
358 }
359
360 if (parm_out)
361 *parm_out = swsci->parm;
362
363 return 0;
364
365 #undef C
366 }
367
368 #define DISPLAY_TYPE_CRT 0
369 #define DISPLAY_TYPE_TV 1
370 #define DISPLAY_TYPE_EXTERNAL_FLAT_PANEL 2
371 #define DISPLAY_TYPE_INTERNAL_FLAT_PANEL 3
372
intel_opregion_notify_encoder(struct intel_encoder * intel_encoder,bool enable)373 int intel_opregion_notify_encoder(struct intel_encoder *intel_encoder,
374 bool enable)
375 {
376 struct drm_i915_private *dev_priv = to_i915(intel_encoder->base.dev);
377 u32 parm = 0;
378 u32 type = 0;
379 u32 port;
380
381 /* don't care about old stuff for now */
382 if (!HAS_DDI(dev_priv))
383 return 0;
384
385 if (intel_encoder->type == INTEL_OUTPUT_DSI)
386 port = 0;
387 else
388 port = intel_encoder->port;
389
390 if (port == PORT_E) {
391 port = 0;
392 } else {
393 parm |= 1 << port;
394 port++;
395 }
396
397 if (!enable)
398 parm |= 4 << 8;
399
400 switch (intel_encoder->type) {
401 case INTEL_OUTPUT_ANALOG:
402 type = DISPLAY_TYPE_CRT;
403 break;
404 case INTEL_OUTPUT_DDI:
405 case INTEL_OUTPUT_DP:
406 case INTEL_OUTPUT_HDMI:
407 case INTEL_OUTPUT_DP_MST:
408 type = DISPLAY_TYPE_EXTERNAL_FLAT_PANEL;
409 break;
410 case INTEL_OUTPUT_EDP:
411 case INTEL_OUTPUT_DSI:
412 type = DISPLAY_TYPE_INTERNAL_FLAT_PANEL;
413 break;
414 default:
415 WARN_ONCE(1, "unsupported intel_encoder type %d\n",
416 intel_encoder->type);
417 return -EINVAL;
418 }
419
420 parm |= type << (16 + port * 3);
421
422 return swsci(dev_priv, SWSCI_SBCB_DISPLAY_POWER_STATE, parm, NULL);
423 }
424
425 static const struct {
426 pci_power_t pci_power_state;
427 u32 parm;
428 } power_state_map[] = {
429 { PCI_D0, 0x00 },
430 { PCI_D1, 0x01 },
431 { PCI_D2, 0x02 },
432 { PCI_D3hot, 0x04 },
433 { PCI_D3cold, 0x04 },
434 };
435
intel_opregion_notify_adapter(struct drm_i915_private * dev_priv,pci_power_t state)436 int intel_opregion_notify_adapter(struct drm_i915_private *dev_priv,
437 pci_power_t state)
438 {
439 int i;
440
441 if (!HAS_DDI(dev_priv))
442 return 0;
443
444 for (i = 0; i < ARRAY_SIZE(power_state_map); i++) {
445 if (state == power_state_map[i].pci_power_state)
446 return swsci(dev_priv, SWSCI_SBCB_ADAPTER_POWER_STATE,
447 power_state_map[i].parm, NULL);
448 }
449
450 return -EINVAL;
451 }
452
asle_set_backlight(struct drm_i915_private * dev_priv,u32 bclp)453 static u32 asle_set_backlight(struct drm_i915_private *dev_priv, u32 bclp)
454 {
455 struct intel_connector *connector;
456 struct drm_connector_list_iter conn_iter;
457 struct opregion_asle *asle = dev_priv->opregion.asle;
458 struct drm_device *dev = &dev_priv->drm;
459
460 DRM_DEBUG_DRIVER("bclp = 0x%08x\n", bclp);
461
462 #ifndef __NetBSD__ /* XXX backlight */
463 if (acpi_video_get_backlight_type() == acpi_backlight_native) {
464 DRM_DEBUG_KMS("opregion backlight request ignored\n");
465 return 0;
466 }
467 #endif
468
469 if (!(bclp & ASLE_BCLP_VALID))
470 return ASLC_BACKLIGHT_FAILED;
471
472 bclp &= ASLE_BCLP_MSK;
473 if (bclp > 255)
474 return ASLC_BACKLIGHT_FAILED;
475
476 drm_modeset_lock(&dev->mode_config.connection_mutex, NULL);
477
478 /*
479 * Update backlight on all connectors that support backlight (usually
480 * only one).
481 */
482 DRM_DEBUG_KMS("updating opregion backlight %d/255\n", bclp);
483 drm_connector_list_iter_begin(dev, &conn_iter);
484 for_each_intel_connector_iter(connector, &conn_iter)
485 intel_panel_set_backlight_acpi(connector->base.state, bclp, 255);
486 drm_connector_list_iter_end(&conn_iter);
487 asle->cblv = DIV_ROUND_UP(bclp * 100, 255) | ASLE_CBLV_VALID;
488
489 drm_modeset_unlock(&dev->mode_config.connection_mutex);
490
491
492 return 0;
493 }
494
asle_set_als_illum(struct drm_i915_private * dev_priv,u32 alsi)495 static u32 asle_set_als_illum(struct drm_i915_private *dev_priv, u32 alsi)
496 {
497 /* alsi is the current ALS reading in lux. 0 indicates below sensor
498 range, 0xffff indicates above sensor range. 1-0xfffe are valid */
499 DRM_DEBUG_DRIVER("Illum is not supported\n");
500 return ASLC_ALS_ILLUM_FAILED;
501 }
502
asle_set_pwm_freq(struct drm_i915_private * dev_priv,u32 pfmb)503 static u32 asle_set_pwm_freq(struct drm_i915_private *dev_priv, u32 pfmb)
504 {
505 DRM_DEBUG_DRIVER("PWM freq is not supported\n");
506 return ASLC_PWM_FREQ_FAILED;
507 }
508
asle_set_pfit(struct drm_i915_private * dev_priv,u32 pfit)509 static u32 asle_set_pfit(struct drm_i915_private *dev_priv, u32 pfit)
510 {
511 /* Panel fitting is currently controlled by the X code, so this is a
512 noop until modesetting support works fully */
513 DRM_DEBUG_DRIVER("Pfit is not supported\n");
514 return ASLC_PFIT_FAILED;
515 }
516
asle_set_supported_rotation_angles(struct drm_i915_private * dev_priv,u32 srot)517 static u32 asle_set_supported_rotation_angles(struct drm_i915_private *dev_priv, u32 srot)
518 {
519 DRM_DEBUG_DRIVER("SROT is not supported\n");
520 return ASLC_ROTATION_ANGLES_FAILED;
521 }
522
asle_set_button_array(struct drm_i915_private * dev_priv,u32 iuer)523 static u32 asle_set_button_array(struct drm_i915_private *dev_priv, u32 iuer)
524 {
525 if (!iuer)
526 DRM_DEBUG_DRIVER("Button array event is not supported (nothing)\n");
527 if (iuer & ASLE_IUER_ROTATION_LOCK_BTN)
528 DRM_DEBUG_DRIVER("Button array event is not supported (rotation lock)\n");
529 if (iuer & ASLE_IUER_VOLUME_DOWN_BTN)
530 DRM_DEBUG_DRIVER("Button array event is not supported (volume down)\n");
531 if (iuer & ASLE_IUER_VOLUME_UP_BTN)
532 DRM_DEBUG_DRIVER("Button array event is not supported (volume up)\n");
533 if (iuer & ASLE_IUER_WINDOWS_BTN)
534 DRM_DEBUG_DRIVER("Button array event is not supported (windows)\n");
535 if (iuer & ASLE_IUER_POWER_BTN)
536 DRM_DEBUG_DRIVER("Button array event is not supported (power)\n");
537
538 return ASLC_BUTTON_ARRAY_FAILED;
539 }
540
asle_set_convertible(struct drm_i915_private * dev_priv,u32 iuer)541 static u32 asle_set_convertible(struct drm_i915_private *dev_priv, u32 iuer)
542 {
543 if (iuer & ASLE_IUER_CONVERTIBLE)
544 DRM_DEBUG_DRIVER("Convertible is not supported (clamshell)\n");
545 else
546 DRM_DEBUG_DRIVER("Convertible is not supported (slate)\n");
547
548 return ASLC_CONVERTIBLE_FAILED;
549 }
550
asle_set_docking(struct drm_i915_private * dev_priv,u32 iuer)551 static u32 asle_set_docking(struct drm_i915_private *dev_priv, u32 iuer)
552 {
553 if (iuer & ASLE_IUER_DOCKING)
554 DRM_DEBUG_DRIVER("Docking is not supported (docked)\n");
555 else
556 DRM_DEBUG_DRIVER("Docking is not supported (undocked)\n");
557
558 return ASLC_DOCKING_FAILED;
559 }
560
asle_isct_state(struct drm_i915_private * dev_priv)561 static u32 asle_isct_state(struct drm_i915_private *dev_priv)
562 {
563 DRM_DEBUG_DRIVER("ISCT is not supported\n");
564 return ASLC_ISCT_STATE_FAILED;
565 }
566
asle_work(struct work_struct * work)567 static void asle_work(struct work_struct *work)
568 {
569 struct intel_opregion *opregion =
570 container_of(work, struct intel_opregion, asle_work);
571 struct drm_i915_private *dev_priv =
572 container_of(opregion, struct drm_i915_private, opregion);
573 struct opregion_asle *asle = dev_priv->opregion.asle;
574 u32 aslc_stat = 0;
575 u32 aslc_req;
576
577 if (!asle)
578 return;
579
580 aslc_req = asle->aslc;
581
582 if (!(aslc_req & ASLC_REQ_MSK)) {
583 DRM_DEBUG_DRIVER("No request on ASLC interrupt 0x%08x\n",
584 aslc_req);
585 return;
586 }
587
588 if (aslc_req & ASLC_SET_ALS_ILLUM)
589 aslc_stat |= asle_set_als_illum(dev_priv, asle->alsi);
590
591 if (aslc_req & ASLC_SET_BACKLIGHT)
592 aslc_stat |= asle_set_backlight(dev_priv, asle->bclp);
593
594 if (aslc_req & ASLC_SET_PFIT)
595 aslc_stat |= asle_set_pfit(dev_priv, asle->pfit);
596
597 if (aslc_req & ASLC_SET_PWM_FREQ)
598 aslc_stat |= asle_set_pwm_freq(dev_priv, asle->pfmb);
599
600 if (aslc_req & ASLC_SUPPORTED_ROTATION_ANGLES)
601 aslc_stat |= asle_set_supported_rotation_angles(dev_priv,
602 asle->srot);
603
604 if (aslc_req & ASLC_BUTTON_ARRAY)
605 aslc_stat |= asle_set_button_array(dev_priv, asle->iuer);
606
607 if (aslc_req & ASLC_CONVERTIBLE_INDICATOR)
608 aslc_stat |= asle_set_convertible(dev_priv, asle->iuer);
609
610 if (aslc_req & ASLC_DOCKING_INDICATOR)
611 aslc_stat |= asle_set_docking(dev_priv, asle->iuer);
612
613 if (aslc_req & ASLC_ISCT_STATE_CHANGE)
614 aslc_stat |= asle_isct_state(dev_priv);
615
616 asle->aslc = aslc_stat;
617 }
618
intel_opregion_asle_intr(struct drm_i915_private * dev_priv)619 void intel_opregion_asle_intr(struct drm_i915_private *dev_priv)
620 {
621 if (dev_priv->opregion.asle)
622 schedule_work(&dev_priv->opregion.asle_work);
623 }
624
625 #define ACPI_EV_DISPLAY_SWITCH (1<<0)
626 #define ACPI_EV_LID (1<<1)
627 #define ACPI_EV_DOCK (1<<2)
628
629 #ifdef __NetBSD__
630 static void
intel_opregion_video_event(ACPI_HANDLE hdl,uint32_t notify,void * cookie)631 intel_opregion_video_event(ACPI_HANDLE hdl, uint32_t notify, void *cookie)
632 {
633 struct intel_opregion *opregion = cookie;
634 struct opregion_acpi *acpi = opregion->acpi;
635
636 DRM_DEBUG_DRIVER("notify=0x%08x csts=0x%02x cevt=0x%02x\n", notify,
637 acpi->csts, acpi->cevt);
638
639 /*
640 * The firmware sets CSTS to 0x03 `Dispatched (ASL)' before
641 * issuing any graphics notification, and won't issue
642 * additional notifications until the graphics driver sets CSTS
643 * to 0x00 `Success (Driver)' to acknowledge it.
644 */
645 if (acpi->csts != 0x03)
646 return;
647 acpi->csts = 0;
648 }
649 #else /* !__NetBSD__ */
650 /*
651 * The only video events relevant to opregion are 0x80. These indicate either a
652 * docking event, lid switch or display switch request. In Linux, these are
653 * handled by the dock, button and video drivers.
654 */
intel_opregion_video_event(struct notifier_block * nb,unsigned long val,void * data)655 static int intel_opregion_video_event(struct notifier_block *nb,
656 unsigned long val, void *data)
657 {
658 struct intel_opregion *opregion = container_of(nb, struct intel_opregion,
659 acpi_notifier);
660 struct acpi_bus_event *event = data;
661 struct opregion_acpi *acpi;
662 int ret = NOTIFY_OK;
663
664 if (strcmp(event->device_class, ACPI_VIDEO_CLASS) != 0)
665 return NOTIFY_DONE;
666
667 acpi = opregion->acpi;
668
669 if (event->type == 0x80 && ((acpi->cevt & 1) == 0))
670 ret = NOTIFY_BAD;
671
672 acpi->csts = 0;
673
674 return ret;
675 }
676 #endif
677
678 /*
679 * Initialise the DIDL field in opregion. This passes a list of devices to
680 * the firmware. Values are defined by section B.4.2 of the ACPI specification
681 * (version 3)
682 */
683
set_did(struct intel_opregion * opregion,int i,u32 val)684 static void set_did(struct intel_opregion *opregion, int i, u32 val)
685 {
686 if (i < ARRAY_SIZE(opregion->acpi->didl)) {
687 opregion->acpi->didl[i] = val;
688 } else {
689 i -= ARRAY_SIZE(opregion->acpi->didl);
690
691 if (WARN_ON(i >= ARRAY_SIZE(opregion->acpi->did2)))
692 return;
693
694 opregion->acpi->did2[i] = val;
695 }
696 }
697
acpi_display_type(struct intel_connector * connector)698 static u32 acpi_display_type(struct intel_connector *connector)
699 {
700 u32 display_type;
701
702 switch (connector->base.connector_type) {
703 case DRM_MODE_CONNECTOR_VGA:
704 case DRM_MODE_CONNECTOR_DVIA:
705 display_type = ACPI_DISPLAY_TYPE_VGA;
706 break;
707 case DRM_MODE_CONNECTOR_Composite:
708 case DRM_MODE_CONNECTOR_SVIDEO:
709 case DRM_MODE_CONNECTOR_Component:
710 case DRM_MODE_CONNECTOR_9PinDIN:
711 case DRM_MODE_CONNECTOR_TV:
712 display_type = ACPI_DISPLAY_TYPE_TV;
713 break;
714 case DRM_MODE_CONNECTOR_DVII:
715 case DRM_MODE_CONNECTOR_DVID:
716 case DRM_MODE_CONNECTOR_DisplayPort:
717 case DRM_MODE_CONNECTOR_HDMIA:
718 case DRM_MODE_CONNECTOR_HDMIB:
719 display_type = ACPI_DISPLAY_TYPE_EXTERNAL_DIGITAL;
720 break;
721 case DRM_MODE_CONNECTOR_LVDS:
722 case DRM_MODE_CONNECTOR_eDP:
723 case DRM_MODE_CONNECTOR_DSI:
724 display_type = ACPI_DISPLAY_TYPE_INTERNAL_DIGITAL;
725 break;
726 case DRM_MODE_CONNECTOR_Unknown:
727 case DRM_MODE_CONNECTOR_VIRTUAL:
728 display_type = ACPI_DISPLAY_TYPE_OTHER;
729 break;
730 default:
731 MISSING_CASE(connector->base.connector_type);
732 display_type = ACPI_DISPLAY_TYPE_OTHER;
733 break;
734 }
735
736 return display_type;
737 }
738
intel_didl_outputs(struct drm_i915_private * dev_priv)739 static void intel_didl_outputs(struct drm_i915_private *dev_priv)
740 {
741 struct intel_opregion *opregion = &dev_priv->opregion;
742 struct intel_connector *connector;
743 struct drm_connector_list_iter conn_iter;
744 int i = 0, max_outputs;
745 int display_index[16] = {};
746
747 /*
748 * In theory, did2, the extended didl, gets added at opregion version
749 * 3.0. In practice, however, we're supposed to set it for earlier
750 * versions as well, since a BIOS that doesn't understand did2 should
751 * not look at it anyway. Use a variable so we can tweak this if a need
752 * arises later.
753 */
754 max_outputs = ARRAY_SIZE(opregion->acpi->didl) +
755 ARRAY_SIZE(opregion->acpi->did2);
756
757 drm_connector_list_iter_begin(&dev_priv->drm, &conn_iter);
758 for_each_intel_connector_iter(connector, &conn_iter) {
759 u32 device_id, type;
760
761 device_id = acpi_display_type(connector);
762
763 /* Use display type specific display index. */
764 type = (device_id & ACPI_DISPLAY_TYPE_MASK)
765 >> ACPI_DISPLAY_TYPE_SHIFT;
766 device_id |= display_index[type]++ << ACPI_DISPLAY_INDEX_SHIFT;
767
768 connector->acpi_device_id = device_id;
769 if (i < max_outputs)
770 set_did(opregion, i, device_id);
771 i++;
772 }
773 drm_connector_list_iter_end(&conn_iter);
774
775 DRM_DEBUG_KMS("%d outputs detected\n", i);
776
777 if (i > max_outputs)
778 DRM_ERROR("More than %d outputs in connector list\n",
779 max_outputs);
780
781 /* If fewer than max outputs, the list must be null terminated */
782 if (i < max_outputs)
783 set_did(opregion, i, 0);
784 }
785
intel_setup_cadls(struct drm_i915_private * dev_priv)786 static void intel_setup_cadls(struct drm_i915_private *dev_priv)
787 {
788 struct intel_opregion *opregion = &dev_priv->opregion;
789 struct intel_connector *connector;
790 struct drm_connector_list_iter conn_iter;
791 int i = 0;
792
793 /*
794 * Initialize the CADL field from the connector device ids. This is
795 * essentially the same as copying from the DIDL. Technically, this is
796 * not always correct as display outputs may exist, but not active. This
797 * initialization is necessary for some Clevo laptops that check this
798 * field before processing the brightness and display switching hotkeys.
799 *
800 * Note that internal panels should be at the front of the connector
801 * list already, ensuring they're not left out.
802 */
803 drm_connector_list_iter_begin(&dev_priv->drm, &conn_iter);
804 for_each_intel_connector_iter(connector, &conn_iter) {
805 if (i >= ARRAY_SIZE(opregion->acpi->cadl))
806 break;
807 opregion->acpi->cadl[i++] = connector->acpi_device_id;
808 }
809 drm_connector_list_iter_end(&conn_iter);
810
811 /* If fewer than 8 active devices, the list must be null terminated */
812 if (i < ARRAY_SIZE(opregion->acpi->cadl))
813 opregion->acpi->cadl[i] = 0;
814 }
815
swsci_setup(struct drm_i915_private * dev_priv)816 static void swsci_setup(struct drm_i915_private *dev_priv)
817 {
818 struct intel_opregion *opregion = &dev_priv->opregion;
819 bool requested_callbacks = false;
820 u32 tmp;
821
822 /* Sub-function code 0 is okay, let's allow them. */
823 opregion->swsci_gbda_sub_functions = 1;
824 opregion->swsci_sbcb_sub_functions = 1;
825
826 /* We use GBDA to ask for supported GBDA calls. */
827 if (swsci(dev_priv, SWSCI_GBDA_SUPPORTED_CALLS, 0, &tmp) == 0) {
828 /* make the bits match the sub-function codes */
829 tmp <<= 1;
830 opregion->swsci_gbda_sub_functions |= tmp;
831 }
832
833 /*
834 * We also use GBDA to ask for _requested_ SBCB callbacks. The driver
835 * must not call interfaces that are not specifically requested by the
836 * bios.
837 */
838 if (swsci(dev_priv, SWSCI_GBDA_REQUESTED_CALLBACKS, 0, &tmp) == 0) {
839 /* here, the bits already match sub-function codes */
840 opregion->swsci_sbcb_sub_functions |= tmp;
841 requested_callbacks = true;
842 }
843
844 /*
845 * But we use SBCB to ask for _supported_ SBCB calls. This does not mean
846 * the callback is _requested_. But we still can't call interfaces that
847 * are not requested.
848 */
849 if (swsci(dev_priv, SWSCI_SBCB_SUPPORTED_CALLBACKS, 0, &tmp) == 0) {
850 /* make the bits match the sub-function codes */
851 u32 low = tmp & 0x7ff;
852 u32 high = tmp & ~0xfff; /* bit 11 is reserved */
853 tmp = (high << 4) | (low << 1) | 1;
854
855 /* best guess what to do with supported wrt requested */
856 if (requested_callbacks) {
857 u32 req = opregion->swsci_sbcb_sub_functions;
858 if ((req & tmp) != req)
859 DRM_DEBUG_DRIVER("SWSCI BIOS requested (%08x) SBCB callbacks that are not supported (%08x)\n", req, tmp);
860 /* XXX: for now, trust the requested callbacks */
861 /* opregion->swsci_sbcb_sub_functions &= tmp; */
862 } else {
863 opregion->swsci_sbcb_sub_functions |= tmp;
864 }
865 }
866
867 DRM_DEBUG_DRIVER("SWSCI GBDA callbacks %08x, SBCB callbacks %08x\n",
868 opregion->swsci_gbda_sub_functions,
869 opregion->swsci_sbcb_sub_functions);
870 }
871
intel_no_opregion_vbt_callback(const struct dmi_system_id * id)872 static int intel_no_opregion_vbt_callback(const struct dmi_system_id *id)
873 {
874 DRM_DEBUG_KMS("Falling back to manually reading VBT from "
875 "VBIOS ROM for %s\n", id->ident);
876 return 1;
877 }
878
879 static const struct dmi_system_id intel_no_opregion_vbt[] = {
880 {
881 .callback = intel_no_opregion_vbt_callback,
882 .ident = "ThinkCentre A57",
883 .matches = {
884 DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
885 DMI_MATCH(DMI_PRODUCT_NAME, "97027RG"),
886 },
887 },
888 { }
889 };
890
intel_load_vbt_firmware(struct drm_i915_private * dev_priv)891 static int intel_load_vbt_firmware(struct drm_i915_private *dev_priv)
892 {
893 struct intel_opregion *opregion = &dev_priv->opregion;
894 const struct firmware *fw = NULL;
895 const char *name = i915_modparams.vbt_firmware;
896 int ret;
897
898 if (!name || !*name)
899 return -ENOENT;
900
901 ret = request_firmware(&fw, name, pci_dev_dev(dev_priv->drm.pdev));
902 if (ret) {
903 DRM_ERROR("Requesting VBT firmware \"%s\" failed (%d)\n",
904 name, ret);
905 return ret;
906 }
907
908 if (intel_bios_is_valid_vbt(fw->data, fw->size)) {
909 opregion->vbt_firmware = kmemdup(fw->data, fw->size, GFP_KERNEL);
910 if (opregion->vbt_firmware) {
911 DRM_DEBUG_KMS("Found valid VBT firmware \"%s\"\n", name);
912 opregion->vbt = opregion->vbt_firmware;
913 opregion->vbt_size = fw->size;
914 ret = 0;
915 } else {
916 ret = -ENOMEM;
917 }
918 } else {
919 DRM_DEBUG_KMS("Invalid VBT firmware \"%s\"\n", name);
920 ret = -EINVAL;
921 }
922
923 release_firmware(fw);
924
925 return ret;
926 }
927
intel_opregion_setup(struct drm_i915_private * dev_priv)928 int intel_opregion_setup(struct drm_i915_private *dev_priv)
929 {
930 struct intel_opregion *opregion = &dev_priv->opregion;
931 struct pci_dev *pdev = dev_priv->drm.pdev;
932 u32 asls, mboxes;
933 char buf[sizeof(OPREGION_SIGNATURE)];
934 int err = 0;
935 void *base;
936 const void *vbt;
937 u32 vbt_size;
938
939 BUILD_BUG_ON(sizeof(struct opregion_header) != 0x100);
940 BUILD_BUG_ON(sizeof(struct opregion_acpi) != 0x100);
941 BUILD_BUG_ON(sizeof(struct opregion_swsci) != 0x100);
942 BUILD_BUG_ON(sizeof(struct opregion_asle) != 0x100);
943 BUILD_BUG_ON(sizeof(struct opregion_asle_ext) != 0x400);
944
945 pci_read_config_dword(pdev, ASLS, &asls);
946 DRM_DEBUG_DRIVER("graphic opregion physical addr: 0x%x\n", asls);
947 if (asls == 0) {
948 DRM_DEBUG_DRIVER("ACPI OpRegion not supported!\n");
949 return -ENOTSUPP;
950 }
951
952 INIT_WORK(&opregion->asle_work, asle_work);
953
954 #ifdef __NetBSD__
955 base = AcpiOsMapMemory(asls, OPREGION_SIZE);
956 #else
957 base = memremap(asls, OPREGION_SIZE, MEMREMAP_WB);
958 #endif
959 if (!base)
960 return -ENOMEM;
961
962 memcpy(buf, base, sizeof(buf));
963
964 if (memcmp(buf, OPREGION_SIGNATURE, 16)) {
965 DRM_DEBUG_DRIVER("opregion signature mismatch\n");
966 err = -EINVAL;
967 goto err_out;
968 }
969 opregion->header = base;
970 opregion->lid_state = base + ACPI_CLID;
971
972 DRM_DEBUG_DRIVER("ACPI OpRegion version %u.%u.%u\n",
973 opregion->header->over.major,
974 opregion->header->over.minor,
975 opregion->header->over.revision);
976
977 mboxes = opregion->header->mboxes;
978 if (mboxes & MBOX_ACPI) {
979 DRM_DEBUG_DRIVER("Public ACPI methods supported\n");
980 opregion->acpi = base + OPREGION_ACPI_OFFSET;
981 /*
982 * Indicate we handle monitor hotplug events ourselves so we do
983 * not need ACPI notifications for them. Disabling these avoids
984 * triggering the AML code doing the notifation, which may be
985 * broken as Windows also seems to disable these.
986 */
987 opregion->acpi->chpd = 1;
988 }
989
990 if (mboxes & MBOX_SWSCI) {
991 DRM_DEBUG_DRIVER("SWSCI supported\n");
992 opregion->swsci = base + OPREGION_SWSCI_OFFSET;
993 swsci_setup(dev_priv);
994 }
995
996 if (mboxes & MBOX_ASLE) {
997 DRM_DEBUG_DRIVER("ASLE supported\n");
998 opregion->asle = base + OPREGION_ASLE_OFFSET;
999
1000 opregion->asle->ardy = ASLE_ARDY_NOT_READY;
1001 }
1002
1003 if (mboxes & MBOX_ASLE_EXT)
1004 DRM_DEBUG_DRIVER("ASLE extension supported\n");
1005
1006 if (intel_load_vbt_firmware(dev_priv) == 0)
1007 goto out;
1008
1009 if (dmi_check_system(intel_no_opregion_vbt))
1010 goto out;
1011
1012 if (opregion->header->over.major >= 2 && opregion->asle &&
1013 opregion->asle->rvda && opregion->asle->rvds) {
1014 resource_size_t rvda = opregion->asle->rvda;
1015
1016 /*
1017 * opregion 2.0: rvda is the physical VBT address.
1018 *
1019 * opregion 2.1+: rvda is unsigned, relative offset from
1020 * opregion base, and should never point within opregion.
1021 */
1022 if (opregion->header->over.major > 2 ||
1023 opregion->header->over.minor >= 1) {
1024 WARN_ON(rvda < OPREGION_SIZE);
1025
1026 rvda += asls;
1027 }
1028
1029 #ifdef __NetBSD__
1030 opregion->rvda = AcpiOsMapMemory(rvda, opregion->asle->rvds);
1031 #else
1032 opregion->rvda = memremap(rvda, opregion->asle->rvds,
1033 MEMREMAP_WB);
1034 #endif
1035
1036 vbt = opregion->rvda;
1037 vbt_size = opregion->asle->rvds;
1038 if (intel_bios_is_valid_vbt(vbt, vbt_size)) {
1039 DRM_DEBUG_KMS("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_DEBUG_KMS("Invalid VBT in ACPI OpRegion (RVDA)\n");
1045 #ifdef __NetBSD__
1046 AcpiOsUnmapMemory(opregion->rvda,
1047 opregion->asle->rvds);
1048 #else
1049 memunmap(opregion->rvda);
1050 #endif
1051 opregion->rvda = NULL;
1052 }
1053 }
1054
1055 vbt = base + OPREGION_VBT_OFFSET;
1056 /*
1057 * The VBT specification says that if the ASLE ext mailbox is not used
1058 * its area is reserved, but on some CHT boards the VBT extends into the
1059 * ASLE ext area. Allow this even though it is against the spec, so we
1060 * do not end up rejecting the VBT on those boards (and end up not
1061 * finding the LCD panel because of this).
1062 */
1063 vbt_size = (mboxes & MBOX_ASLE_EXT) ?
1064 OPREGION_ASLE_EXT_OFFSET : OPREGION_SIZE;
1065 vbt_size -= OPREGION_VBT_OFFSET;
1066 if (intel_bios_is_valid_vbt(vbt, vbt_size)) {
1067 DRM_DEBUG_KMS("Found valid VBT in ACPI OpRegion (Mailbox #4)\n");
1068 opregion->vbt = vbt;
1069 opregion->vbt_size = vbt_size;
1070 } else {
1071 DRM_DEBUG_KMS("Invalid VBT in ACPI OpRegion (Mailbox #4)\n");
1072 }
1073
1074 out:
1075 return 0;
1076
1077 err_out:
1078 #ifdef __NetBSD__
1079 AcpiOsUnmapMemory(base, OPREGION_SIZE);
1080 #else
1081 memunmap(base);
1082 #endif
1083 return err;
1084 }
1085
intel_use_opregion_panel_type_callback(const struct dmi_system_id * id)1086 static int intel_use_opregion_panel_type_callback(const struct dmi_system_id *id)
1087 {
1088 DRM_INFO("Using panel type from OpRegion on %s\n", id->ident);
1089 return 1;
1090 }
1091
1092 static const struct dmi_system_id intel_use_opregion_panel_type[] = {
1093 {
1094 .callback = intel_use_opregion_panel_type_callback,
1095 .ident = "Conrac GmbH IX45GM2",
1096 .matches = {DMI_MATCH(DMI_SYS_VENDOR, "Conrac GmbH"),
1097 DMI_MATCH(DMI_PRODUCT_NAME, "IX45GM2"),
1098 },
1099 },
1100 { }
1101 };
1102
1103 int
intel_opregion_get_panel_type(struct drm_i915_private * dev_priv)1104 intel_opregion_get_panel_type(struct drm_i915_private *dev_priv)
1105 {
1106 u32 panel_details;
1107 int ret;
1108
1109 ret = swsci(dev_priv, SWSCI_GBDA_PANEL_DETAILS, 0x0, &panel_details);
1110 if (ret) {
1111 DRM_DEBUG_KMS("Failed to get panel details from OpRegion (%d)\n",
1112 ret);
1113 return ret;
1114 }
1115
1116 ret = (panel_details >> 8) & 0xff;
1117 if (ret > 0x10) {
1118 DRM_DEBUG_KMS("Invalid OpRegion panel type 0x%x\n", ret);
1119 return -EINVAL;
1120 }
1121
1122 /* fall back to VBT panel type? */
1123 if (ret == 0x0) {
1124 DRM_DEBUG_KMS("No panel type in OpRegion\n");
1125 return -ENODEV;
1126 }
1127
1128 /*
1129 * So far we know that some machined must use it, others must not use it.
1130 * There doesn't seem to be any way to determine which way to go, except
1131 * via a quirk list :(
1132 */
1133 if (!dmi_check_system(intel_use_opregion_panel_type)) {
1134 DRM_DEBUG_KMS("Ignoring OpRegion panel type (%d)\n", ret - 1);
1135 return -ENODEV;
1136 }
1137
1138 return ret - 1;
1139 }
1140
intel_opregion_register(struct drm_i915_private * i915)1141 void intel_opregion_register(struct drm_i915_private *i915)
1142 {
1143 struct intel_opregion *opregion = &i915->opregion;
1144
1145 if (!opregion->header)
1146 return;
1147
1148 if (opregion->acpi) {
1149 #ifdef __NetBSD__
1150 opregion->acpi_notifier =
1151 acpidisp_register_notify(intel_opregion_video_event,
1152 opregion);
1153 #else
1154 opregion->acpi_notifier.notifier_call =
1155 intel_opregion_video_event;
1156 register_acpi_notifier(&opregion->acpi_notifier);
1157 #endif
1158 }
1159
1160 intel_opregion_resume(i915);
1161 }
1162
intel_opregion_resume(struct drm_i915_private * i915)1163 void intel_opregion_resume(struct drm_i915_private *i915)
1164 {
1165 struct intel_opregion *opregion = &i915->opregion;
1166
1167 if (!opregion->header)
1168 return;
1169
1170 if (opregion->acpi) {
1171 intel_didl_outputs(i915);
1172 intel_setup_cadls(i915);
1173
1174 /*
1175 * Notify BIOS we are ready to handle ACPI video ext notifs.
1176 * Right now, all the events are handled by the ACPI video
1177 * module. We don't actually need to do anything with them.
1178 */
1179 opregion->acpi->csts = 0;
1180 opregion->acpi->drdy = 1;
1181 }
1182
1183 if (opregion->asle) {
1184 opregion->asle->tche = ASLE_TCHE_BLC_EN;
1185 opregion->asle->ardy = ASLE_ARDY_READY;
1186 }
1187
1188 intel_opregion_notify_adapter(i915, PCI_D0);
1189 }
1190
intel_opregion_suspend(struct drm_i915_private * i915,pci_power_t state)1191 void intel_opregion_suspend(struct drm_i915_private *i915, pci_power_t state)
1192 {
1193 struct intel_opregion *opregion = &i915->opregion;
1194
1195 if (!opregion->header)
1196 return;
1197
1198 intel_opregion_notify_adapter(i915, state);
1199
1200 if (opregion->asle)
1201 opregion->asle->ardy = ASLE_ARDY_NOT_READY;
1202
1203 cancel_work_sync(&i915->opregion.asle_work);
1204
1205 if (opregion->acpi)
1206 opregion->acpi->drdy = 0;
1207 }
1208
intel_opregion_unregister(struct drm_i915_private * i915)1209 void intel_opregion_unregister(struct drm_i915_private *i915)
1210 {
1211 struct intel_opregion *opregion = &i915->opregion;
1212
1213 intel_opregion_suspend(i915, PCI_D1);
1214
1215 if (!opregion->header)
1216 return;
1217
1218 #ifdef __NetBSD__
1219 if (opregion->acpi_notifier) {
1220 acpidisp_deregister_notify(opregion->acpi_notifier);
1221 opregion->acpi_notifier = NULL;
1222 }
1223 #else
1224 if (opregion->acpi_notifier.notifier_call) {
1225 unregister_acpi_notifier(&opregion->acpi_notifier);
1226 opregion->acpi_notifier.notifier_call = NULL;
1227 }
1228 #endif
1229
1230 /* just clear all opregion memory pointers now */
1231 #ifdef __NetBSD__
1232 size_t rvds = opregion->asle->rvds;
1233 AcpiOsUnmapMemory(opregion->header, OPREGION_SIZE);
1234 #else
1235 memunmap(opregion->header);
1236 #endif
1237 if (opregion->rvda) {
1238 #ifdef __NetBSD__
1239 AcpiOsUnmapMemory(opregion->rvda, rvds);
1240 #else
1241 memunmap(opregion->rvda);
1242 #endif
1243 opregion->rvda = NULL;
1244 }
1245 if (opregion->vbt_firmware) {
1246 kfree(opregion->vbt_firmware);
1247 opregion->vbt_firmware = NULL;
1248 }
1249 opregion->header = NULL;
1250 opregion->acpi = NULL;
1251 opregion->swsci = NULL;
1252 opregion->asle = NULL;
1253 opregion->vbt = NULL;
1254 opregion->lid_state = NULL;
1255 }
1256