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Merge tag 'mac80211-for-davem-2016-01-26' of git://git.kernel.org/pub/scm/linux/kerne...
[deliverable/linux.git] / drivers / gpu / drm / i915 / intel_opregion.c
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 <acpi/video.h>
31
32 #include <drm/drmP.h>
33 #include <drm/i915_drm.h>
34 #include "i915_drv.h"
35 #include "intel_drv.h"
36
37 #define PCI_ASLE 0xe4
38 #define PCI_ASLS 0xfc
39 #define PCI_SWSCI 0xe8
40 #define PCI_SWSCI_SCISEL (1 << 15)
41 #define PCI_SWSCI_GSSCIE (1 << 0)
42
43 #define OPREGION_HEADER_OFFSET 0
44 #define OPREGION_ACPI_OFFSET 0x100
45 #define ACPI_CLID 0x01ac /* current lid state indicator */
46 #define ACPI_CDCK 0x01b0 /* current docking state indicator */
47 #define OPREGION_SWSCI_OFFSET 0x200
48 #define OPREGION_ASLE_OFFSET 0x300
49 #define OPREGION_VBT_OFFSET 0x400
50 #define OPREGION_ASLE_EXT_OFFSET 0x1C00
51
52 #define OPREGION_SIGNATURE "IntelGraphicsMem"
53 #define MBOX_ACPI (1<<0)
54 #define MBOX_SWSCI (1<<1)
55 #define MBOX_ASLE (1<<2)
56 #define MBOX_ASLE_EXT (1<<4)
57
58 struct opregion_header {
59 u8 signature[16];
60 u32 size;
61 u32 opregion_ver;
62 u8 bios_ver[32];
63 u8 vbios_ver[16];
64 u8 driver_ver[16];
65 u32 mboxes;
66 u32 driver_model;
67 u32 pcon;
68 u8 dver[32];
69 u8 rsvd[124];
70 } __packed;
71
72 /* OpRegion mailbox #1: public ACPI methods */
73 struct opregion_acpi {
74 u32 drdy; /* driver readiness */
75 u32 csts; /* notification status */
76 u32 cevt; /* current event */
77 u8 rsvd1[20];
78 u32 didl[8]; /* supported display devices ID list */
79 u32 cpdl[8]; /* currently presented display list */
80 u32 cadl[8]; /* currently active display list */
81 u32 nadl[8]; /* next active devices list */
82 u32 aslp; /* ASL sleep time-out */
83 u32 tidx; /* toggle table index */
84 u32 chpd; /* current hotplug enable indicator */
85 u32 clid; /* current lid state*/
86 u32 cdck; /* current docking state */
87 u32 sxsw; /* Sx state resume */
88 u32 evts; /* ASL supported events */
89 u32 cnot; /* current OS notification */
90 u32 nrdy; /* driver status */
91 u32 did2[7]; /* extended supported display devices ID list */
92 u32 cpd2[7]; /* extended attached display devices list */
93 u8 rsvd2[4];
94 } __packed;
95
96 /* OpRegion mailbox #2: SWSCI */
97 struct opregion_swsci {
98 u32 scic; /* SWSCI command|status|data */
99 u32 parm; /* command parameters */
100 u32 dslp; /* driver sleep time-out */
101 u8 rsvd[244];
102 } __packed;
103
104 /* OpRegion mailbox #3: ASLE */
105 struct opregion_asle {
106 u32 ardy; /* driver readiness */
107 u32 aslc; /* ASLE interrupt command */
108 u32 tche; /* technology enabled indicator */
109 u32 alsi; /* current ALS illuminance reading */
110 u32 bclp; /* backlight brightness to set */
111 u32 pfit; /* panel fitting state */
112 u32 cblv; /* current brightness level */
113 u16 bclm[20]; /* backlight level duty cycle mapping table */
114 u32 cpfm; /* current panel fitting mode */
115 u32 epfm; /* enabled panel fitting modes */
116 u8 plut[74]; /* panel LUT and identifier */
117 u32 pfmb; /* PWM freq and min brightness */
118 u32 cddv; /* color correction default values */
119 u32 pcft; /* power conservation features */
120 u32 srot; /* supported rotation angles */
121 u32 iuer; /* IUER events */
122 u64 fdss;
123 u32 fdsp;
124 u32 stat;
125 u64 rvda; /* Physical address of raw vbt data */
126 u32 rvds; /* Size of raw vbt data */
127 u8 rsvd[58];
128 } __packed;
129
130 /* OpRegion mailbox #5: ASLE ext */
131 struct opregion_asle_ext {
132 u32 phed; /* Panel Header */
133 u8 bddc[256]; /* Panel EDID */
134 u8 rsvd[764];
135 } __packed;
136
137 /* Driver readiness indicator */
138 #define ASLE_ARDY_READY (1 << 0)
139 #define ASLE_ARDY_NOT_READY (0 << 0)
140
141 /* ASLE Interrupt Command (ASLC) bits */
142 #define ASLC_SET_ALS_ILLUM (1 << 0)
143 #define ASLC_SET_BACKLIGHT (1 << 1)
144 #define ASLC_SET_PFIT (1 << 2)
145 #define ASLC_SET_PWM_FREQ (1 << 3)
146 #define ASLC_SUPPORTED_ROTATION_ANGLES (1 << 4)
147 #define ASLC_BUTTON_ARRAY (1 << 5)
148 #define ASLC_CONVERTIBLE_INDICATOR (1 << 6)
149 #define ASLC_DOCKING_INDICATOR (1 << 7)
150 #define ASLC_ISCT_STATE_CHANGE (1 << 8)
151 #define ASLC_REQ_MSK 0x1ff
152 /* response bits */
153 #define ASLC_ALS_ILLUM_FAILED (1 << 10)
154 #define ASLC_BACKLIGHT_FAILED (1 << 12)
155 #define ASLC_PFIT_FAILED (1 << 14)
156 #define ASLC_PWM_FREQ_FAILED (1 << 16)
157 #define ASLC_ROTATION_ANGLES_FAILED (1 << 18)
158 #define ASLC_BUTTON_ARRAY_FAILED (1 << 20)
159 #define ASLC_CONVERTIBLE_FAILED (1 << 22)
160 #define ASLC_DOCKING_FAILED (1 << 24)
161 #define ASLC_ISCT_STATE_FAILED (1 << 26)
162
163 /* Technology enabled indicator */
164 #define ASLE_TCHE_ALS_EN (1 << 0)
165 #define ASLE_TCHE_BLC_EN (1 << 1)
166 #define ASLE_TCHE_PFIT_EN (1 << 2)
167 #define ASLE_TCHE_PFMB_EN (1 << 3)
168
169 /* ASLE backlight brightness to set */
170 #define ASLE_BCLP_VALID (1<<31)
171 #define ASLE_BCLP_MSK (~(1<<31))
172
173 /* ASLE panel fitting request */
174 #define ASLE_PFIT_VALID (1<<31)
175 #define ASLE_PFIT_CENTER (1<<0)
176 #define ASLE_PFIT_STRETCH_TEXT (1<<1)
177 #define ASLE_PFIT_STRETCH_GFX (1<<2)
178
179 /* PWM frequency and minimum brightness */
180 #define ASLE_PFMB_BRIGHTNESS_MASK (0xff)
181 #define ASLE_PFMB_BRIGHTNESS_VALID (1<<8)
182 #define ASLE_PFMB_PWM_MASK (0x7ffffe00)
183 #define ASLE_PFMB_PWM_VALID (1<<31)
184
185 #define ASLE_CBLV_VALID (1<<31)
186
187 /* IUER */
188 #define ASLE_IUER_DOCKING (1 << 7)
189 #define ASLE_IUER_CONVERTIBLE (1 << 6)
190 #define ASLE_IUER_ROTATION_LOCK_BTN (1 << 4)
191 #define ASLE_IUER_VOLUME_DOWN_BTN (1 << 3)
192 #define ASLE_IUER_VOLUME_UP_BTN (1 << 2)
193 #define ASLE_IUER_WINDOWS_BTN (1 << 1)
194 #define ASLE_IUER_POWER_BTN (1 << 0)
195
196 /* Software System Control Interrupt (SWSCI) */
197 #define SWSCI_SCIC_INDICATOR (1 << 0)
198 #define SWSCI_SCIC_MAIN_FUNCTION_SHIFT 1
199 #define SWSCI_SCIC_MAIN_FUNCTION_MASK (0xf << 1)
200 #define SWSCI_SCIC_SUB_FUNCTION_SHIFT 8
201 #define SWSCI_SCIC_SUB_FUNCTION_MASK (0xff << 8)
202 #define SWSCI_SCIC_EXIT_PARAMETER_SHIFT 8
203 #define SWSCI_SCIC_EXIT_PARAMETER_MASK (0xff << 8)
204 #define SWSCI_SCIC_EXIT_STATUS_SHIFT 5
205 #define SWSCI_SCIC_EXIT_STATUS_MASK (7 << 5)
206 #define SWSCI_SCIC_EXIT_STATUS_SUCCESS 1
207
208 #define SWSCI_FUNCTION_CODE(main, sub) \
209 ((main) << SWSCI_SCIC_MAIN_FUNCTION_SHIFT | \
210 (sub) << SWSCI_SCIC_SUB_FUNCTION_SHIFT)
211
212 /* SWSCI: Get BIOS Data (GBDA) */
213 #define SWSCI_GBDA 4
214 #define SWSCI_GBDA_SUPPORTED_CALLS SWSCI_FUNCTION_CODE(SWSCI_GBDA, 0)
215 #define SWSCI_GBDA_REQUESTED_CALLBACKS SWSCI_FUNCTION_CODE(SWSCI_GBDA, 1)
216 #define SWSCI_GBDA_BOOT_DISPLAY_PREF SWSCI_FUNCTION_CODE(SWSCI_GBDA, 4)
217 #define SWSCI_GBDA_PANEL_DETAILS SWSCI_FUNCTION_CODE(SWSCI_GBDA, 5)
218 #define SWSCI_GBDA_TV_STANDARD SWSCI_FUNCTION_CODE(SWSCI_GBDA, 6)
219 #define SWSCI_GBDA_INTERNAL_GRAPHICS SWSCI_FUNCTION_CODE(SWSCI_GBDA, 7)
220 #define SWSCI_GBDA_SPREAD_SPECTRUM SWSCI_FUNCTION_CODE(SWSCI_GBDA, 10)
221
222 /* SWSCI: System BIOS Callbacks (SBCB) */
223 #define SWSCI_SBCB 6
224 #define SWSCI_SBCB_SUPPORTED_CALLBACKS SWSCI_FUNCTION_CODE(SWSCI_SBCB, 0)
225 #define SWSCI_SBCB_INIT_COMPLETION SWSCI_FUNCTION_CODE(SWSCI_SBCB, 1)
226 #define SWSCI_SBCB_PRE_HIRES_SET_MODE SWSCI_FUNCTION_CODE(SWSCI_SBCB, 3)
227 #define SWSCI_SBCB_POST_HIRES_SET_MODE SWSCI_FUNCTION_CODE(SWSCI_SBCB, 4)
228 #define SWSCI_SBCB_DISPLAY_SWITCH SWSCI_FUNCTION_CODE(SWSCI_SBCB, 5)
229 #define SWSCI_SBCB_SET_TV_FORMAT SWSCI_FUNCTION_CODE(SWSCI_SBCB, 6)
230 #define SWSCI_SBCB_ADAPTER_POWER_STATE SWSCI_FUNCTION_CODE(SWSCI_SBCB, 7)
231 #define SWSCI_SBCB_DISPLAY_POWER_STATE SWSCI_FUNCTION_CODE(SWSCI_SBCB, 8)
232 #define SWSCI_SBCB_SET_BOOT_DISPLAY SWSCI_FUNCTION_CODE(SWSCI_SBCB, 9)
233 #define SWSCI_SBCB_SET_PANEL_DETAILS SWSCI_FUNCTION_CODE(SWSCI_SBCB, 10)
234 #define SWSCI_SBCB_SET_INTERNAL_GFX SWSCI_FUNCTION_CODE(SWSCI_SBCB, 11)
235 #define SWSCI_SBCB_POST_HIRES_TO_DOS_FS SWSCI_FUNCTION_CODE(SWSCI_SBCB, 16)
236 #define SWSCI_SBCB_SUSPEND_RESUME SWSCI_FUNCTION_CODE(SWSCI_SBCB, 17)
237 #define SWSCI_SBCB_SET_SPREAD_SPECTRUM SWSCI_FUNCTION_CODE(SWSCI_SBCB, 18)
238 #define SWSCI_SBCB_POST_VBE_PM SWSCI_FUNCTION_CODE(SWSCI_SBCB, 19)
239 #define SWSCI_SBCB_ENABLE_DISABLE_AUDIO SWSCI_FUNCTION_CODE(SWSCI_SBCB, 21)
240
241 #define ACPI_OTHER_OUTPUT (0<<8)
242 #define ACPI_VGA_OUTPUT (1<<8)
243 #define ACPI_TV_OUTPUT (2<<8)
244 #define ACPI_DIGITAL_OUTPUT (3<<8)
245 #define ACPI_LVDS_OUTPUT (4<<8)
246
247 #define MAX_DSLP 1500
248
249 #ifdef CONFIG_ACPI
250 static int swsci(struct drm_device *dev, u32 function, u32 parm, u32 *parm_out)
251 {
252 struct drm_i915_private *dev_priv = dev->dev_private;
253 struct opregion_swsci *swsci = dev_priv->opregion.swsci;
254 u32 main_function, sub_function, scic;
255 u16 pci_swsci;
256 u32 dslp;
257
258 if (!swsci)
259 return -ENODEV;
260
261 main_function = (function & SWSCI_SCIC_MAIN_FUNCTION_MASK) >>
262 SWSCI_SCIC_MAIN_FUNCTION_SHIFT;
263 sub_function = (function & SWSCI_SCIC_SUB_FUNCTION_MASK) >>
264 SWSCI_SCIC_SUB_FUNCTION_SHIFT;
265
266 /* Check if we can call the function. See swsci_setup for details. */
267 if (main_function == SWSCI_SBCB) {
268 if ((dev_priv->opregion.swsci_sbcb_sub_functions &
269 (1 << sub_function)) == 0)
270 return -EINVAL;
271 } else if (main_function == SWSCI_GBDA) {
272 if ((dev_priv->opregion.swsci_gbda_sub_functions &
273 (1 << sub_function)) == 0)
274 return -EINVAL;
275 }
276
277 /* Driver sleep timeout in ms. */
278 dslp = swsci->dslp;
279 if (!dslp) {
280 /* The spec says 2ms should be the default, but it's too small
281 * for some machines. */
282 dslp = 50;
283 } else if (dslp > MAX_DSLP) {
284 /* Hey bios, trust must be earned. */
285 DRM_INFO_ONCE("ACPI BIOS requests an excessive sleep of %u ms, "
286 "using %u ms instead\n", dslp, MAX_DSLP);
287 dslp = MAX_DSLP;
288 }
289
290 /* The spec tells us to do this, but we are the only user... */
291 scic = swsci->scic;
292 if (scic & SWSCI_SCIC_INDICATOR) {
293 DRM_DEBUG_DRIVER("SWSCI request already in progress\n");
294 return -EBUSY;
295 }
296
297 scic = function | SWSCI_SCIC_INDICATOR;
298
299 swsci->parm = parm;
300 swsci->scic = scic;
301
302 /* Ensure SCI event is selected and event trigger is cleared. */
303 pci_read_config_word(dev->pdev, PCI_SWSCI, &pci_swsci);
304 if (!(pci_swsci & PCI_SWSCI_SCISEL) || (pci_swsci & PCI_SWSCI_GSSCIE)) {
305 pci_swsci |= PCI_SWSCI_SCISEL;
306 pci_swsci &= ~PCI_SWSCI_GSSCIE;
307 pci_write_config_word(dev->pdev, PCI_SWSCI, pci_swsci);
308 }
309
310 /* Use event trigger to tell bios to check the mail. */
311 pci_swsci |= PCI_SWSCI_GSSCIE;
312 pci_write_config_word(dev->pdev, PCI_SWSCI, pci_swsci);
313
314 /* Poll for the result. */
315 #define C (((scic = swsci->scic) & SWSCI_SCIC_INDICATOR) == 0)
316 if (wait_for(C, dslp)) {
317 DRM_DEBUG_DRIVER("SWSCI request timed out\n");
318 return -ETIMEDOUT;
319 }
320
321 scic = (scic & SWSCI_SCIC_EXIT_STATUS_MASK) >>
322 SWSCI_SCIC_EXIT_STATUS_SHIFT;
323
324 /* Note: scic == 0 is an error! */
325 if (scic != SWSCI_SCIC_EXIT_STATUS_SUCCESS) {
326 DRM_DEBUG_DRIVER("SWSCI request error %u\n", scic);
327 return -EIO;
328 }
329
330 if (parm_out)
331 *parm_out = swsci->parm;
332
333 return 0;
334
335 #undef C
336 }
337
338 #define DISPLAY_TYPE_CRT 0
339 #define DISPLAY_TYPE_TV 1
340 #define DISPLAY_TYPE_EXTERNAL_FLAT_PANEL 2
341 #define DISPLAY_TYPE_INTERNAL_FLAT_PANEL 3
342
343 int intel_opregion_notify_encoder(struct intel_encoder *intel_encoder,
344 bool enable)
345 {
346 struct drm_device *dev = intel_encoder->base.dev;
347 u32 parm = 0;
348 u32 type = 0;
349 u32 port;
350
351 /* don't care about old stuff for now */
352 if (!HAS_DDI(dev))
353 return 0;
354
355 if (intel_encoder->type == INTEL_OUTPUT_DSI)
356 port = 0;
357 else
358 port = intel_ddi_get_encoder_port(intel_encoder);
359
360 if (port == PORT_E) {
361 port = 0;
362 } else {
363 parm |= 1 << port;
364 port++;
365 }
366
367 if (!enable)
368 parm |= 4 << 8;
369
370 switch (intel_encoder->type) {
371 case INTEL_OUTPUT_ANALOG:
372 type = DISPLAY_TYPE_CRT;
373 break;
374 case INTEL_OUTPUT_UNKNOWN:
375 case INTEL_OUTPUT_DISPLAYPORT:
376 case INTEL_OUTPUT_HDMI:
377 case INTEL_OUTPUT_DP_MST:
378 type = DISPLAY_TYPE_EXTERNAL_FLAT_PANEL;
379 break;
380 case INTEL_OUTPUT_EDP:
381 case INTEL_OUTPUT_DSI:
382 type = DISPLAY_TYPE_INTERNAL_FLAT_PANEL;
383 break;
384 default:
385 WARN_ONCE(1, "unsupported intel_encoder type %d\n",
386 intel_encoder->type);
387 return -EINVAL;
388 }
389
390 parm |= type << (16 + port * 3);
391
392 return swsci(dev, SWSCI_SBCB_DISPLAY_POWER_STATE, parm, NULL);
393 }
394
395 static const struct {
396 pci_power_t pci_power_state;
397 u32 parm;
398 } power_state_map[] = {
399 { PCI_D0, 0x00 },
400 { PCI_D1, 0x01 },
401 { PCI_D2, 0x02 },
402 { PCI_D3hot, 0x04 },
403 { PCI_D3cold, 0x04 },
404 };
405
406 int intel_opregion_notify_adapter(struct drm_device *dev, pci_power_t state)
407 {
408 int i;
409
410 if (!HAS_DDI(dev))
411 return 0;
412
413 for (i = 0; i < ARRAY_SIZE(power_state_map); i++) {
414 if (state == power_state_map[i].pci_power_state)
415 return swsci(dev, SWSCI_SBCB_ADAPTER_POWER_STATE,
416 power_state_map[i].parm, NULL);
417 }
418
419 return -EINVAL;
420 }
421
422 static u32 asle_set_backlight(struct drm_device *dev, u32 bclp)
423 {
424 struct drm_i915_private *dev_priv = dev->dev_private;
425 struct intel_connector *connector;
426 struct opregion_asle *asle = dev_priv->opregion.asle;
427
428 DRM_DEBUG_DRIVER("bclp = 0x%08x\n", bclp);
429
430 if (acpi_video_get_backlight_type() == acpi_backlight_native) {
431 DRM_DEBUG_KMS("opregion backlight request ignored\n");
432 return 0;
433 }
434
435 if (!(bclp & ASLE_BCLP_VALID))
436 return ASLC_BACKLIGHT_FAILED;
437
438 bclp &= ASLE_BCLP_MSK;
439 if (bclp > 255)
440 return ASLC_BACKLIGHT_FAILED;
441
442 drm_modeset_lock(&dev->mode_config.connection_mutex, NULL);
443
444 /*
445 * Update backlight on all connectors that support backlight (usually
446 * only one).
447 */
448 DRM_DEBUG_KMS("updating opregion backlight %d/255\n", bclp);
449 for_each_intel_connector(dev, connector)
450 intel_panel_set_backlight_acpi(connector, bclp, 255);
451 asle->cblv = DIV_ROUND_UP(bclp * 100, 255) | ASLE_CBLV_VALID;
452
453 drm_modeset_unlock(&dev->mode_config.connection_mutex);
454
455
456 return 0;
457 }
458
459 static u32 asle_set_als_illum(struct drm_device *dev, u32 alsi)
460 {
461 /* alsi is the current ALS reading in lux. 0 indicates below sensor
462 range, 0xffff indicates above sensor range. 1-0xfffe are valid */
463 DRM_DEBUG_DRIVER("Illum is not supported\n");
464 return ASLC_ALS_ILLUM_FAILED;
465 }
466
467 static u32 asle_set_pwm_freq(struct drm_device *dev, u32 pfmb)
468 {
469 DRM_DEBUG_DRIVER("PWM freq is not supported\n");
470 return ASLC_PWM_FREQ_FAILED;
471 }
472
473 static u32 asle_set_pfit(struct drm_device *dev, u32 pfit)
474 {
475 /* Panel fitting is currently controlled by the X code, so this is a
476 noop until modesetting support works fully */
477 DRM_DEBUG_DRIVER("Pfit is not supported\n");
478 return ASLC_PFIT_FAILED;
479 }
480
481 static u32 asle_set_supported_rotation_angles(struct drm_device *dev, u32 srot)
482 {
483 DRM_DEBUG_DRIVER("SROT is not supported\n");
484 return ASLC_ROTATION_ANGLES_FAILED;
485 }
486
487 static u32 asle_set_button_array(struct drm_device *dev, u32 iuer)
488 {
489 if (!iuer)
490 DRM_DEBUG_DRIVER("Button array event is not supported (nothing)\n");
491 if (iuer & ASLE_IUER_ROTATION_LOCK_BTN)
492 DRM_DEBUG_DRIVER("Button array event is not supported (rotation lock)\n");
493 if (iuer & ASLE_IUER_VOLUME_DOWN_BTN)
494 DRM_DEBUG_DRIVER("Button array event is not supported (volume down)\n");
495 if (iuer & ASLE_IUER_VOLUME_UP_BTN)
496 DRM_DEBUG_DRIVER("Button array event is not supported (volume up)\n");
497 if (iuer & ASLE_IUER_WINDOWS_BTN)
498 DRM_DEBUG_DRIVER("Button array event is not supported (windows)\n");
499 if (iuer & ASLE_IUER_POWER_BTN)
500 DRM_DEBUG_DRIVER("Button array event is not supported (power)\n");
501
502 return ASLC_BUTTON_ARRAY_FAILED;
503 }
504
505 static u32 asle_set_convertible(struct drm_device *dev, u32 iuer)
506 {
507 if (iuer & ASLE_IUER_CONVERTIBLE)
508 DRM_DEBUG_DRIVER("Convertible is not supported (clamshell)\n");
509 else
510 DRM_DEBUG_DRIVER("Convertible is not supported (slate)\n");
511
512 return ASLC_CONVERTIBLE_FAILED;
513 }
514
515 static u32 asle_set_docking(struct drm_device *dev, u32 iuer)
516 {
517 if (iuer & ASLE_IUER_DOCKING)
518 DRM_DEBUG_DRIVER("Docking is not supported (docked)\n");
519 else
520 DRM_DEBUG_DRIVER("Docking is not supported (undocked)\n");
521
522 return ASLC_DOCKING_FAILED;
523 }
524
525 static u32 asle_isct_state(struct drm_device *dev)
526 {
527 DRM_DEBUG_DRIVER("ISCT is not supported\n");
528 return ASLC_ISCT_STATE_FAILED;
529 }
530
531 static void asle_work(struct work_struct *work)
532 {
533 struct intel_opregion *opregion =
534 container_of(work, struct intel_opregion, asle_work);
535 struct drm_i915_private *dev_priv =
536 container_of(opregion, struct drm_i915_private, opregion);
537 struct drm_device *dev = dev_priv->dev;
538 struct opregion_asle *asle = dev_priv->opregion.asle;
539 u32 aslc_stat = 0;
540 u32 aslc_req;
541
542 if (!asle)
543 return;
544
545 aslc_req = asle->aslc;
546
547 if (!(aslc_req & ASLC_REQ_MSK)) {
548 DRM_DEBUG_DRIVER("No request on ASLC interrupt 0x%08x\n",
549 aslc_req);
550 return;
551 }
552
553 if (aslc_req & ASLC_SET_ALS_ILLUM)
554 aslc_stat |= asle_set_als_illum(dev, asle->alsi);
555
556 if (aslc_req & ASLC_SET_BACKLIGHT)
557 aslc_stat |= asle_set_backlight(dev, asle->bclp);
558
559 if (aslc_req & ASLC_SET_PFIT)
560 aslc_stat |= asle_set_pfit(dev, asle->pfit);
561
562 if (aslc_req & ASLC_SET_PWM_FREQ)
563 aslc_stat |= asle_set_pwm_freq(dev, asle->pfmb);
564
565 if (aslc_req & ASLC_SUPPORTED_ROTATION_ANGLES)
566 aslc_stat |= asle_set_supported_rotation_angles(dev,
567 asle->srot);
568
569 if (aslc_req & ASLC_BUTTON_ARRAY)
570 aslc_stat |= asle_set_button_array(dev, asle->iuer);
571
572 if (aslc_req & ASLC_CONVERTIBLE_INDICATOR)
573 aslc_stat |= asle_set_convertible(dev, asle->iuer);
574
575 if (aslc_req & ASLC_DOCKING_INDICATOR)
576 aslc_stat |= asle_set_docking(dev, asle->iuer);
577
578 if (aslc_req & ASLC_ISCT_STATE_CHANGE)
579 aslc_stat |= asle_isct_state(dev);
580
581 asle->aslc = aslc_stat;
582 }
583
584 void intel_opregion_asle_intr(struct drm_device *dev)
585 {
586 struct drm_i915_private *dev_priv = dev->dev_private;
587
588 if (dev_priv->opregion.asle)
589 schedule_work(&dev_priv->opregion.asle_work);
590 }
591
592 #define ACPI_EV_DISPLAY_SWITCH (1<<0)
593 #define ACPI_EV_LID (1<<1)
594 #define ACPI_EV_DOCK (1<<2)
595
596 static struct intel_opregion *system_opregion;
597
598 static int intel_opregion_video_event(struct notifier_block *nb,
599 unsigned long val, void *data)
600 {
601 /* The only video events relevant to opregion are 0x80. These indicate
602 either a docking event, lid switch or display switch request. In
603 Linux, these are handled by the dock, button and video drivers.
604 */
605
606 struct acpi_bus_event *event = data;
607 struct opregion_acpi *acpi;
608 int ret = NOTIFY_OK;
609
610 if (strcmp(event->device_class, ACPI_VIDEO_CLASS) != 0)
611 return NOTIFY_DONE;
612
613 if (!system_opregion)
614 return NOTIFY_DONE;
615
616 acpi = system_opregion->acpi;
617
618 if (event->type == 0x80 && ((acpi->cevt & 1) == 0))
619 ret = NOTIFY_BAD;
620
621 acpi->csts = 0;
622
623 return ret;
624 }
625
626 static struct notifier_block intel_opregion_notifier = {
627 .notifier_call = intel_opregion_video_event,
628 };
629
630 /*
631 * Initialise the DIDL field in opregion. This passes a list of devices to
632 * the firmware. Values are defined by section B.4.2 of the ACPI specification
633 * (version 3)
634 */
635
636 static u32 get_did(struct intel_opregion *opregion, int i)
637 {
638 u32 did;
639
640 if (i < ARRAY_SIZE(opregion->acpi->didl)) {
641 did = opregion->acpi->didl[i];
642 } else {
643 i -= ARRAY_SIZE(opregion->acpi->didl);
644
645 if (WARN_ON(i >= ARRAY_SIZE(opregion->acpi->did2)))
646 return 0;
647
648 did = opregion->acpi->did2[i];
649 }
650
651 return did;
652 }
653
654 static void set_did(struct intel_opregion *opregion, int i, u32 val)
655 {
656 if (i < ARRAY_SIZE(opregion->acpi->didl)) {
657 opregion->acpi->didl[i] = val;
658 } else {
659 i -= ARRAY_SIZE(opregion->acpi->didl);
660
661 if (WARN_ON(i >= ARRAY_SIZE(opregion->acpi->did2)))
662 return;
663
664 opregion->acpi->did2[i] = val;
665 }
666 }
667
668 static void intel_didl_outputs(struct drm_device *dev)
669 {
670 struct drm_i915_private *dev_priv = dev->dev_private;
671 struct intel_opregion *opregion = &dev_priv->opregion;
672 struct drm_connector *connector;
673 acpi_handle handle;
674 struct acpi_device *acpi_dev, *acpi_cdev, *acpi_video_bus = NULL;
675 unsigned long long device_id;
676 acpi_status status;
677 u32 temp, max_outputs;
678 int i = 0;
679
680 handle = ACPI_HANDLE(&dev->pdev->dev);
681 if (!handle || acpi_bus_get_device(handle, &acpi_dev))
682 return;
683
684 if (acpi_is_video_device(handle))
685 acpi_video_bus = acpi_dev;
686 else {
687 list_for_each_entry(acpi_cdev, &acpi_dev->children, node) {
688 if (acpi_is_video_device(acpi_cdev->handle)) {
689 acpi_video_bus = acpi_cdev;
690 break;
691 }
692 }
693 }
694
695 if (!acpi_video_bus) {
696 DRM_DEBUG_KMS("No ACPI video bus found\n");
697 return;
698 }
699
700 /*
701 * In theory, did2, the extended didl, gets added at opregion version
702 * 3.0. In practice, however, we're supposed to set it for earlier
703 * versions as well, since a BIOS that doesn't understand did2 should
704 * not look at it anyway. Use a variable so we can tweak this if a need
705 * arises later.
706 */
707 max_outputs = ARRAY_SIZE(opregion->acpi->didl) +
708 ARRAY_SIZE(opregion->acpi->did2);
709
710 list_for_each_entry(acpi_cdev, &acpi_video_bus->children, node) {
711 if (i >= max_outputs) {
712 DRM_DEBUG_KMS("More than %u outputs detected via ACPI\n",
713 max_outputs);
714 return;
715 }
716 status = acpi_evaluate_integer(acpi_cdev->handle, "_ADR",
717 NULL, &device_id);
718 if (ACPI_SUCCESS(status)) {
719 if (!device_id)
720 goto blind_set;
721 set_did(opregion, i++, (u32)(device_id & 0x0f0f));
722 }
723 }
724
725 end:
726 DRM_DEBUG_KMS("%d outputs detected\n", i);
727
728 /* If fewer than max outputs, the list must be null terminated */
729 if (i < max_outputs)
730 set_did(opregion, i, 0);
731 return;
732
733 blind_set:
734 i = 0;
735 list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
736 int output_type = ACPI_OTHER_OUTPUT;
737 if (i >= max_outputs) {
738 DRM_DEBUG_KMS("More than %u outputs in connector list\n",
739 max_outputs);
740 return;
741 }
742 switch (connector->connector_type) {
743 case DRM_MODE_CONNECTOR_VGA:
744 case DRM_MODE_CONNECTOR_DVIA:
745 output_type = ACPI_VGA_OUTPUT;
746 break;
747 case DRM_MODE_CONNECTOR_Composite:
748 case DRM_MODE_CONNECTOR_SVIDEO:
749 case DRM_MODE_CONNECTOR_Component:
750 case DRM_MODE_CONNECTOR_9PinDIN:
751 output_type = ACPI_TV_OUTPUT;
752 break;
753 case DRM_MODE_CONNECTOR_DVII:
754 case DRM_MODE_CONNECTOR_DVID:
755 case DRM_MODE_CONNECTOR_DisplayPort:
756 case DRM_MODE_CONNECTOR_HDMIA:
757 case DRM_MODE_CONNECTOR_HDMIB:
758 output_type = ACPI_DIGITAL_OUTPUT;
759 break;
760 case DRM_MODE_CONNECTOR_LVDS:
761 output_type = ACPI_LVDS_OUTPUT;
762 break;
763 }
764 temp = get_did(opregion, i);
765 set_did(opregion, i, temp | (1 << 31) | output_type | i);
766 i++;
767 }
768 goto end;
769 }
770
771 static void intel_setup_cadls(struct drm_device *dev)
772 {
773 struct drm_i915_private *dev_priv = dev->dev_private;
774 struct intel_opregion *opregion = &dev_priv->opregion;
775 int i = 0;
776 u32 disp_id;
777
778 /* Initialize the CADL field by duplicating the DIDL values.
779 * Technically, this is not always correct as display outputs may exist,
780 * but not active. This initialization is necessary for some Clevo
781 * laptops that check this field before processing the brightness and
782 * display switching hotkeys. Just like DIDL, CADL is NULL-terminated if
783 * there are less than eight devices. */
784 do {
785 disp_id = get_did(opregion, i);
786 opregion->acpi->cadl[i] = disp_id;
787 } while (++i < 8 && disp_id != 0);
788 }
789
790 void intel_opregion_init(struct drm_device *dev)
791 {
792 struct drm_i915_private *dev_priv = dev->dev_private;
793 struct intel_opregion *opregion = &dev_priv->opregion;
794
795 if (!opregion->header)
796 return;
797
798 if (opregion->acpi) {
799 intel_didl_outputs(dev);
800 intel_setup_cadls(dev);
801
802 /* Notify BIOS we are ready to handle ACPI video ext notifs.
803 * Right now, all the events are handled by the ACPI video module.
804 * We don't actually need to do anything with them. */
805 opregion->acpi->csts = 0;
806 opregion->acpi->drdy = 1;
807
808 system_opregion = opregion;
809 register_acpi_notifier(&intel_opregion_notifier);
810 }
811
812 if (opregion->asle) {
813 opregion->asle->tche = ASLE_TCHE_BLC_EN;
814 opregion->asle->ardy = ASLE_ARDY_READY;
815 }
816 }
817
818 void intel_opregion_fini(struct drm_device *dev)
819 {
820 struct drm_i915_private *dev_priv = dev->dev_private;
821 struct intel_opregion *opregion = &dev_priv->opregion;
822
823 if (!opregion->header)
824 return;
825
826 if (opregion->asle)
827 opregion->asle->ardy = ASLE_ARDY_NOT_READY;
828
829 cancel_work_sync(&dev_priv->opregion.asle_work);
830
831 if (opregion->acpi) {
832 opregion->acpi->drdy = 0;
833
834 system_opregion = NULL;
835 unregister_acpi_notifier(&intel_opregion_notifier);
836 }
837
838 /* just clear all opregion memory pointers now */
839 memunmap(opregion->header);
840 if (opregion->rvda) {
841 memunmap(opregion->rvda);
842 opregion->rvda = NULL;
843 }
844 opregion->header = NULL;
845 opregion->acpi = NULL;
846 opregion->swsci = NULL;
847 opregion->asle = NULL;
848 opregion->vbt = NULL;
849 opregion->lid_state = NULL;
850 }
851
852 static void swsci_setup(struct drm_device *dev)
853 {
854 struct drm_i915_private *dev_priv = dev->dev_private;
855 struct intel_opregion *opregion = &dev_priv->opregion;
856 bool requested_callbacks = false;
857 u32 tmp;
858
859 /* Sub-function code 0 is okay, let's allow them. */
860 opregion->swsci_gbda_sub_functions = 1;
861 opregion->swsci_sbcb_sub_functions = 1;
862
863 /* We use GBDA to ask for supported GBDA calls. */
864 if (swsci(dev, SWSCI_GBDA_SUPPORTED_CALLS, 0, &tmp) == 0) {
865 /* make the bits match the sub-function codes */
866 tmp <<= 1;
867 opregion->swsci_gbda_sub_functions |= tmp;
868 }
869
870 /*
871 * We also use GBDA to ask for _requested_ SBCB callbacks. The driver
872 * must not call interfaces that are not specifically requested by the
873 * bios.
874 */
875 if (swsci(dev, SWSCI_GBDA_REQUESTED_CALLBACKS, 0, &tmp) == 0) {
876 /* here, the bits already match sub-function codes */
877 opregion->swsci_sbcb_sub_functions |= tmp;
878 requested_callbacks = true;
879 }
880
881 /*
882 * But we use SBCB to ask for _supported_ SBCB calls. This does not mean
883 * the callback is _requested_. But we still can't call interfaces that
884 * are not requested.
885 */
886 if (swsci(dev, SWSCI_SBCB_SUPPORTED_CALLBACKS, 0, &tmp) == 0) {
887 /* make the bits match the sub-function codes */
888 u32 low = tmp & 0x7ff;
889 u32 high = tmp & ~0xfff; /* bit 11 is reserved */
890 tmp = (high << 4) | (low << 1) | 1;
891
892 /* best guess what to do with supported wrt requested */
893 if (requested_callbacks) {
894 u32 req = opregion->swsci_sbcb_sub_functions;
895 if ((req & tmp) != req)
896 DRM_DEBUG_DRIVER("SWSCI BIOS requested (%08x) SBCB callbacks that are not supported (%08x)\n", req, tmp);
897 /* XXX: for now, trust the requested callbacks */
898 /* opregion->swsci_sbcb_sub_functions &= tmp; */
899 } else {
900 opregion->swsci_sbcb_sub_functions |= tmp;
901 }
902 }
903
904 DRM_DEBUG_DRIVER("SWSCI GBDA callbacks %08x, SBCB callbacks %08x\n",
905 opregion->swsci_gbda_sub_functions,
906 opregion->swsci_sbcb_sub_functions);
907 }
908 #else /* CONFIG_ACPI */
909 static inline void swsci_setup(struct drm_device *dev) {}
910 #endif /* CONFIG_ACPI */
911
912 static int intel_no_opregion_vbt_callback(const struct dmi_system_id *id)
913 {
914 DRM_DEBUG_KMS("Falling back to manually reading VBT from "
915 "VBIOS ROM for %s\n", id->ident);
916 return 1;
917 }
918
919 static const struct dmi_system_id intel_no_opregion_vbt[] = {
920 {
921 .callback = intel_no_opregion_vbt_callback,
922 .ident = "ThinkCentre A57",
923 .matches = {
924 DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
925 DMI_MATCH(DMI_PRODUCT_NAME, "97027RG"),
926 },
927 },
928 { }
929 };
930
931 int intel_opregion_setup(struct drm_device *dev)
932 {
933 struct drm_i915_private *dev_priv = dev->dev_private;
934 struct intel_opregion *opregion = &dev_priv->opregion;
935 u32 asls, mboxes;
936 char buf[sizeof(OPREGION_SIGNATURE)];
937 int err = 0;
938 void *base;
939
940 BUILD_BUG_ON(sizeof(struct opregion_header) != 0x100);
941 BUILD_BUG_ON(sizeof(struct opregion_acpi) != 0x100);
942 BUILD_BUG_ON(sizeof(struct opregion_swsci) != 0x100);
943 BUILD_BUG_ON(sizeof(struct opregion_asle) != 0x100);
944 BUILD_BUG_ON(sizeof(struct opregion_asle_ext) != 0x400);
945
946 pci_read_config_dword(dev->pdev, PCI_ASLS, &asls);
947 DRM_DEBUG_DRIVER("graphic opregion physical addr: 0x%x\n", asls);
948 if (asls == 0) {
949 DRM_DEBUG_DRIVER("ACPI OpRegion not supported!\n");
950 return -ENOTSUPP;
951 }
952
953 #ifdef CONFIG_ACPI
954 INIT_WORK(&opregion->asle_work, asle_work);
955 #endif
956
957 base = memremap(asls, OPREGION_SIZE, MEMREMAP_WB);
958 if (!base)
959 return -ENOMEM;
960
961 memcpy(buf, base, sizeof(buf));
962
963 if (memcmp(buf, OPREGION_SIGNATURE, 16)) {
964 DRM_DEBUG_DRIVER("opregion signature mismatch\n");
965 err = -EINVAL;
966 goto err_out;
967 }
968 opregion->header = base;
969 opregion->lid_state = base + ACPI_CLID;
970
971 mboxes = opregion->header->mboxes;
972 if (mboxes & MBOX_ACPI) {
973 DRM_DEBUG_DRIVER("Public ACPI methods supported\n");
974 opregion->acpi = base + OPREGION_ACPI_OFFSET;
975 }
976
977 if (mboxes & MBOX_SWSCI) {
978 DRM_DEBUG_DRIVER("SWSCI supported\n");
979 opregion->swsci = base + OPREGION_SWSCI_OFFSET;
980 swsci_setup(dev);
981 }
982
983 if (mboxes & MBOX_ASLE) {
984 DRM_DEBUG_DRIVER("ASLE supported\n");
985 opregion->asle = base + OPREGION_ASLE_OFFSET;
986
987 opregion->asle->ardy = ASLE_ARDY_NOT_READY;
988 }
989
990 if (mboxes & MBOX_ASLE_EXT)
991 DRM_DEBUG_DRIVER("ASLE extension supported\n");
992
993 if (!dmi_check_system(intel_no_opregion_vbt)) {
994 const void *vbt = NULL;
995 u32 vbt_size = 0;
996
997 if (opregion->header->opregion_ver >= 2 && opregion->asle &&
998 opregion->asle->rvda && opregion->asle->rvds) {
999 opregion->rvda = memremap(opregion->asle->rvda,
1000 opregion->asle->rvds,
1001 MEMREMAP_WB);
1002 vbt = opregion->rvda;
1003 vbt_size = opregion->asle->rvds;
1004 }
1005
1006 if (intel_bios_is_valid_vbt(vbt, vbt_size)) {
1007 DRM_DEBUG_KMS("Found valid VBT in ACPI OpRegion (RVDA)\n");
1008 opregion->vbt = vbt;
1009 opregion->vbt_size = vbt_size;
1010 } else {
1011 vbt = base + OPREGION_VBT_OFFSET;
1012 vbt_size = OPREGION_ASLE_EXT_OFFSET - OPREGION_VBT_OFFSET;
1013 if (intel_bios_is_valid_vbt(vbt, vbt_size)) {
1014 DRM_DEBUG_KMS("Found valid VBT in ACPI OpRegion (Mailbox #4)\n");
1015 opregion->vbt = vbt;
1016 opregion->vbt_size = vbt_size;
1017 }
1018 }
1019 }
1020
1021 return 0;
1022
1023 err_out:
1024 memunmap(base);
1025 return err;
1026 }
Linux kernel - Deliverables
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