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[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 <acpi/video.h>
30
31 #include <drm/drmP.h>
32 #include <drm/i915_drm.h>
33 #include "i915_drv.h"
34 #include "intel_drv.h"
35
36 #define PCI_ASLE 0xe4
37 #define PCI_ASLS 0xfc
38 #define PCI_SWSCI 0xe8
39 #define PCI_SWSCI_SCISEL (1 << 15)
40 #define PCI_SWSCI_GSSCIE (1 << 0)
41
42 #define OPREGION_HEADER_OFFSET 0
43 #define OPREGION_ACPI_OFFSET 0x100
44 #define ACPI_CLID 0x01ac /* current lid state indicator */
45 #define ACPI_CDCK 0x01b0 /* current docking state indicator */
46 #define OPREGION_SWSCI_OFFSET 0x200
47 #define OPREGION_ASLE_OFFSET 0x300
48 #define OPREGION_VBT_OFFSET 0x400
49 #define OPREGION_ASLE_EXT_OFFSET 0x1C00
50
51 #define OPREGION_SIGNATURE "IntelGraphicsMem"
52 #define MBOX_ACPI (1<<0)
53 #define MBOX_SWSCI (1<<1)
54 #define MBOX_ASLE (1<<2)
55 #define MBOX_ASLE_EXT (1<<4)
56
57 struct opregion_header {
58 u8 signature[16];
59 u32 size;
60 u32 opregion_ver;
61 u8 bios_ver[32];
62 u8 vbios_ver[16];
63 u8 driver_ver[16];
64 u32 mboxes;
65 u32 driver_model;
66 u32 pcon;
67 u8 dver[32];
68 u8 rsvd[124];
69 } __packed;
70
71 /* OpRegion mailbox #1: public ACPI methods */
72 struct opregion_acpi {
73 u32 drdy; /* driver readiness */
74 u32 csts; /* notification status */
75 u32 cevt; /* current event */
76 u8 rsvd1[20];
77 u32 didl[8]; /* supported display devices ID list */
78 u32 cpdl[8]; /* currently presented display list */
79 u32 cadl[8]; /* currently active display list */
80 u32 nadl[8]; /* next active devices list */
81 u32 aslp; /* ASL sleep time-out */
82 u32 tidx; /* toggle table index */
83 u32 chpd; /* current hotplug enable indicator */
84 u32 clid; /* current lid state*/
85 u32 cdck; /* current docking state */
86 u32 sxsw; /* Sx state resume */
87 u32 evts; /* ASL supported events */
88 u32 cnot; /* current OS notification */
89 u32 nrdy; /* driver status */
90 u32 did2[7]; /* extended supported display devices ID list */
91 u32 cpd2[7]; /* extended attached display devices list */
92 u8 rsvd2[4];
93 } __packed;
94
95 /* OpRegion mailbox #2: SWSCI */
96 struct opregion_swsci {
97 u32 scic; /* SWSCI command|status|data */
98 u32 parm; /* command parameters */
99 u32 dslp; /* driver sleep time-out */
100 u8 rsvd[244];
101 } __packed;
102
103 /* OpRegion mailbox #3: ASLE */
104 struct opregion_asle {
105 u32 ardy; /* driver readiness */
106 u32 aslc; /* ASLE interrupt command */
107 u32 tche; /* technology enabled indicator */
108 u32 alsi; /* current ALS illuminance reading */
109 u32 bclp; /* backlight brightness to set */
110 u32 pfit; /* panel fitting state */
111 u32 cblv; /* current brightness level */
112 u16 bclm[20]; /* backlight level duty cycle mapping table */
113 u32 cpfm; /* current panel fitting mode */
114 u32 epfm; /* enabled panel fitting modes */
115 u8 plut[74]; /* panel LUT and identifier */
116 u32 pfmb; /* PWM freq and min brightness */
117 u32 cddv; /* color correction default values */
118 u32 pcft; /* power conservation features */
119 u32 srot; /* supported rotation angles */
120 u32 iuer; /* IUER events */
121 u64 fdss;
122 u32 fdsp;
123 u32 stat;
124 u64 rvda; /* Physical address of raw vbt data */
125 u32 rvds; /* Size of raw vbt data */
126 u8 rsvd[58];
127 } __packed;
128
129 /* OpRegion mailbox #5: ASLE ext */
130 struct opregion_asle_ext {
131 u32 phed; /* Panel Header */
132 u8 bddc[256]; /* Panel EDID */
133 u8 rsvd[764];
134 } __packed;
135
136 /* Driver readiness indicator */
137 #define ASLE_ARDY_READY (1 << 0)
138 #define ASLE_ARDY_NOT_READY (0 << 0)
139
140 /* ASLE Interrupt Command (ASLC) bits */
141 #define ASLC_SET_ALS_ILLUM (1 << 0)
142 #define ASLC_SET_BACKLIGHT (1 << 1)
143 #define ASLC_SET_PFIT (1 << 2)
144 #define ASLC_SET_PWM_FREQ (1 << 3)
145 #define ASLC_SUPPORTED_ROTATION_ANGLES (1 << 4)
146 #define ASLC_BUTTON_ARRAY (1 << 5)
147 #define ASLC_CONVERTIBLE_INDICATOR (1 << 6)
148 #define ASLC_DOCKING_INDICATOR (1 << 7)
149 #define ASLC_ISCT_STATE_CHANGE (1 << 8)
150 #define ASLC_REQ_MSK 0x1ff
151 /* response bits */
152 #define ASLC_ALS_ILLUM_FAILED (1 << 10)
153 #define ASLC_BACKLIGHT_FAILED (1 << 12)
154 #define ASLC_PFIT_FAILED (1 << 14)
155 #define ASLC_PWM_FREQ_FAILED (1 << 16)
156 #define ASLC_ROTATION_ANGLES_FAILED (1 << 18)
157 #define ASLC_BUTTON_ARRAY_FAILED (1 << 20)
158 #define ASLC_CONVERTIBLE_FAILED (1 << 22)
159 #define ASLC_DOCKING_FAILED (1 << 24)
160 #define ASLC_ISCT_STATE_FAILED (1 << 26)
161
162 /* Technology enabled indicator */
163 #define ASLE_TCHE_ALS_EN (1 << 0)
164 #define ASLE_TCHE_BLC_EN (1 << 1)
165 #define ASLE_TCHE_PFIT_EN (1 << 2)
166 #define ASLE_TCHE_PFMB_EN (1 << 3)
167
168 /* ASLE backlight brightness to set */
169 #define ASLE_BCLP_VALID (1<<31)
170 #define ASLE_BCLP_MSK (~(1<<31))
171
172 /* ASLE panel fitting request */
173 #define ASLE_PFIT_VALID (1<<31)
174 #define ASLE_PFIT_CENTER (1<<0)
175 #define ASLE_PFIT_STRETCH_TEXT (1<<1)
176 #define ASLE_PFIT_STRETCH_GFX (1<<2)
177
178 /* PWM frequency and minimum brightness */
179 #define ASLE_PFMB_BRIGHTNESS_MASK (0xff)
180 #define ASLE_PFMB_BRIGHTNESS_VALID (1<<8)
181 #define ASLE_PFMB_PWM_MASK (0x7ffffe00)
182 #define ASLE_PFMB_PWM_VALID (1<<31)
183
184 #define ASLE_CBLV_VALID (1<<31)
185
186 /* IUER */
187 #define ASLE_IUER_DOCKING (1 << 7)
188 #define ASLE_IUER_CONVERTIBLE (1 << 6)
189 #define ASLE_IUER_ROTATION_LOCK_BTN (1 << 4)
190 #define ASLE_IUER_VOLUME_DOWN_BTN (1 << 3)
191 #define ASLE_IUER_VOLUME_UP_BTN (1 << 2)
192 #define ASLE_IUER_WINDOWS_BTN (1 << 1)
193 #define ASLE_IUER_POWER_BTN (1 << 0)
194
195 /* Software System Control Interrupt (SWSCI) */
196 #define SWSCI_SCIC_INDICATOR (1 << 0)
197 #define SWSCI_SCIC_MAIN_FUNCTION_SHIFT 1
198 #define SWSCI_SCIC_MAIN_FUNCTION_MASK (0xf << 1)
199 #define SWSCI_SCIC_SUB_FUNCTION_SHIFT 8
200 #define SWSCI_SCIC_SUB_FUNCTION_MASK (0xff << 8)
201 #define SWSCI_SCIC_EXIT_PARAMETER_SHIFT 8
202 #define SWSCI_SCIC_EXIT_PARAMETER_MASK (0xff << 8)
203 #define SWSCI_SCIC_EXIT_STATUS_SHIFT 5
204 #define SWSCI_SCIC_EXIT_STATUS_MASK (7 << 5)
205 #define SWSCI_SCIC_EXIT_STATUS_SUCCESS 1
206
207 #define SWSCI_FUNCTION_CODE(main, sub) \
208 ((main) << SWSCI_SCIC_MAIN_FUNCTION_SHIFT | \
209 (sub) << SWSCI_SCIC_SUB_FUNCTION_SHIFT)
210
211 /* SWSCI: Get BIOS Data (GBDA) */
212 #define SWSCI_GBDA 4
213 #define SWSCI_GBDA_SUPPORTED_CALLS SWSCI_FUNCTION_CODE(SWSCI_GBDA, 0)
214 #define SWSCI_GBDA_REQUESTED_CALLBACKS SWSCI_FUNCTION_CODE(SWSCI_GBDA, 1)
215 #define SWSCI_GBDA_BOOT_DISPLAY_PREF SWSCI_FUNCTION_CODE(SWSCI_GBDA, 4)
216 #define SWSCI_GBDA_PANEL_DETAILS SWSCI_FUNCTION_CODE(SWSCI_GBDA, 5)
217 #define SWSCI_GBDA_TV_STANDARD SWSCI_FUNCTION_CODE(SWSCI_GBDA, 6)
218 #define SWSCI_GBDA_INTERNAL_GRAPHICS SWSCI_FUNCTION_CODE(SWSCI_GBDA, 7)
219 #define SWSCI_GBDA_SPREAD_SPECTRUM SWSCI_FUNCTION_CODE(SWSCI_GBDA, 10)
220
221 /* SWSCI: System BIOS Callbacks (SBCB) */
222 #define SWSCI_SBCB 6
223 #define SWSCI_SBCB_SUPPORTED_CALLBACKS SWSCI_FUNCTION_CODE(SWSCI_SBCB, 0)
224 #define SWSCI_SBCB_INIT_COMPLETION SWSCI_FUNCTION_CODE(SWSCI_SBCB, 1)
225 #define SWSCI_SBCB_PRE_HIRES_SET_MODE SWSCI_FUNCTION_CODE(SWSCI_SBCB, 3)
226 #define SWSCI_SBCB_POST_HIRES_SET_MODE SWSCI_FUNCTION_CODE(SWSCI_SBCB, 4)
227 #define SWSCI_SBCB_DISPLAY_SWITCH SWSCI_FUNCTION_CODE(SWSCI_SBCB, 5)
228 #define SWSCI_SBCB_SET_TV_FORMAT SWSCI_FUNCTION_CODE(SWSCI_SBCB, 6)
229 #define SWSCI_SBCB_ADAPTER_POWER_STATE SWSCI_FUNCTION_CODE(SWSCI_SBCB, 7)
230 #define SWSCI_SBCB_DISPLAY_POWER_STATE SWSCI_FUNCTION_CODE(SWSCI_SBCB, 8)
231 #define SWSCI_SBCB_SET_BOOT_DISPLAY SWSCI_FUNCTION_CODE(SWSCI_SBCB, 9)
232 #define SWSCI_SBCB_SET_PANEL_DETAILS SWSCI_FUNCTION_CODE(SWSCI_SBCB, 10)
233 #define SWSCI_SBCB_SET_INTERNAL_GFX SWSCI_FUNCTION_CODE(SWSCI_SBCB, 11)
234 #define SWSCI_SBCB_POST_HIRES_TO_DOS_FS SWSCI_FUNCTION_CODE(SWSCI_SBCB, 16)
235 #define SWSCI_SBCB_SUSPEND_RESUME SWSCI_FUNCTION_CODE(SWSCI_SBCB, 17)
236 #define SWSCI_SBCB_SET_SPREAD_SPECTRUM SWSCI_FUNCTION_CODE(SWSCI_SBCB, 18)
237 #define SWSCI_SBCB_POST_VBE_PM SWSCI_FUNCTION_CODE(SWSCI_SBCB, 19)
238 #define SWSCI_SBCB_ENABLE_DISABLE_AUDIO SWSCI_FUNCTION_CODE(SWSCI_SBCB, 21)
239
240 #define ACPI_OTHER_OUTPUT (0<<8)
241 #define ACPI_VGA_OUTPUT (1<<8)
242 #define ACPI_TV_OUTPUT (2<<8)
243 #define ACPI_DIGITAL_OUTPUT (3<<8)
244 #define ACPI_LVDS_OUTPUT (4<<8)
245
246 #define MAX_DSLP 1500
247
248 #ifdef CONFIG_ACPI
249 static int swsci(struct drm_device *dev, u32 function, u32 parm, u32 *parm_out)
250 {
251 struct drm_i915_private *dev_priv = dev->dev_private;
252 struct opregion_swsci *swsci = dev_priv->opregion.swsci;
253 u32 main_function, sub_function, scic;
254 u16 pci_swsci;
255 u32 dslp;
256
257 if (!swsci)
258 return -ENODEV;
259
260 main_function = (function & SWSCI_SCIC_MAIN_FUNCTION_MASK) >>
261 SWSCI_SCIC_MAIN_FUNCTION_SHIFT;
262 sub_function = (function & SWSCI_SCIC_SUB_FUNCTION_MASK) >>
263 SWSCI_SCIC_SUB_FUNCTION_SHIFT;
264
265 /* Check if we can call the function. See swsci_setup for details. */
266 if (main_function == SWSCI_SBCB) {
267 if ((dev_priv->opregion.swsci_sbcb_sub_functions &
268 (1 << sub_function)) == 0)
269 return -EINVAL;
270 } else if (main_function == SWSCI_GBDA) {
271 if ((dev_priv->opregion.swsci_gbda_sub_functions &
272 (1 << sub_function)) == 0)
273 return -EINVAL;
274 }
275
276 /* Driver sleep timeout in ms. */
277 dslp = swsci->dslp;
278 if (!dslp) {
279 /* The spec says 2ms should be the default, but it's too small
280 * for some machines. */
281 dslp = 50;
282 } else if (dslp > MAX_DSLP) {
283 /* Hey bios, trust must be earned. */
284 DRM_INFO_ONCE("ACPI BIOS requests an excessive sleep of %u ms, "
285 "using %u ms instead\n", dslp, MAX_DSLP);
286 dslp = MAX_DSLP;
287 }
288
289 /* The spec tells us to do this, but we are the only user... */
290 scic = swsci->scic;
291 if (scic & SWSCI_SCIC_INDICATOR) {
292 DRM_DEBUG_DRIVER("SWSCI request already in progress\n");
293 return -EBUSY;
294 }
295
296 scic = function | SWSCI_SCIC_INDICATOR;
297
298 swsci->parm = parm;
299 swsci->scic = scic;
300
301 /* Ensure SCI event is selected and event trigger is cleared. */
302 pci_read_config_word(dev->pdev, PCI_SWSCI, &pci_swsci);
303 if (!(pci_swsci & PCI_SWSCI_SCISEL) || (pci_swsci & PCI_SWSCI_GSSCIE)) {
304 pci_swsci |= PCI_SWSCI_SCISEL;
305 pci_swsci &= ~PCI_SWSCI_GSSCIE;
306 pci_write_config_word(dev->pdev, PCI_SWSCI, pci_swsci);
307 }
308
309 /* Use event trigger to tell bios to check the mail. */
310 pci_swsci |= PCI_SWSCI_GSSCIE;
311 pci_write_config_word(dev->pdev, PCI_SWSCI, pci_swsci);
312
313 /* Poll for the result. */
314 #define C (((scic = swsci->scic) & SWSCI_SCIC_INDICATOR) == 0)
315 if (wait_for(C, dslp)) {
316 DRM_DEBUG_DRIVER("SWSCI request timed out\n");
317 return -ETIMEDOUT;
318 }
319
320 scic = (scic & SWSCI_SCIC_EXIT_STATUS_MASK) >>
321 SWSCI_SCIC_EXIT_STATUS_SHIFT;
322
323 /* Note: scic == 0 is an error! */
324 if (scic != SWSCI_SCIC_EXIT_STATUS_SUCCESS) {
325 DRM_DEBUG_DRIVER("SWSCI request error %u\n", scic);
326 return -EIO;
327 }
328
329 if (parm_out)
330 *parm_out = swsci->parm;
331
332 return 0;
333
334 #undef C
335 }
336
337 #define DISPLAY_TYPE_CRT 0
338 #define DISPLAY_TYPE_TV 1
339 #define DISPLAY_TYPE_EXTERNAL_FLAT_PANEL 2
340 #define DISPLAY_TYPE_INTERNAL_FLAT_PANEL 3
341
342 int intel_opregion_notify_encoder(struct intel_encoder *intel_encoder,
343 bool enable)
344 {
345 struct drm_device *dev = intel_encoder->base.dev;
346 u32 parm = 0;
347 u32 type = 0;
348 u32 port;
349
350 /* don't care about old stuff for now */
351 if (!HAS_DDI(dev))
352 return 0;
353
354 if (intel_encoder->type == INTEL_OUTPUT_DSI)
355 port = 0;
356 else
357 port = intel_ddi_get_encoder_port(intel_encoder);
358
359 if (port == PORT_E) {
360 port = 0;
361 } else {
362 parm |= 1 << port;
363 port++;
364 }
365
366 if (!enable)
367 parm |= 4 << 8;
368
369 switch (intel_encoder->type) {
370 case INTEL_OUTPUT_ANALOG:
371 type = DISPLAY_TYPE_CRT;
372 break;
373 case INTEL_OUTPUT_UNKNOWN:
374 case INTEL_OUTPUT_DISPLAYPORT:
375 case INTEL_OUTPUT_HDMI:
376 case INTEL_OUTPUT_DP_MST:
377 type = DISPLAY_TYPE_EXTERNAL_FLAT_PANEL;
378 break;
379 case INTEL_OUTPUT_EDP:
380 case INTEL_OUTPUT_DSI:
381 type = DISPLAY_TYPE_INTERNAL_FLAT_PANEL;
382 break;
383 default:
384 WARN_ONCE(1, "unsupported intel_encoder type %d\n",
385 intel_encoder->type);
386 return -EINVAL;
387 }
388
389 parm |= type << (16 + port * 3);
390
391 return swsci(dev, SWSCI_SBCB_DISPLAY_POWER_STATE, parm, NULL);
392 }
393
394 static const struct {
395 pci_power_t pci_power_state;
396 u32 parm;
397 } power_state_map[] = {
398 { PCI_D0, 0x00 },
399 { PCI_D1, 0x01 },
400 { PCI_D2, 0x02 },
401 { PCI_D3hot, 0x04 },
402 { PCI_D3cold, 0x04 },
403 };
404
405 int intel_opregion_notify_adapter(struct drm_device *dev, pci_power_t state)
406 {
407 int i;
408
409 if (!HAS_DDI(dev))
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, SWSCI_SBCB_ADAPTER_POWER_STATE,
415 power_state_map[i].parm, NULL);
416 }
417
418 return -EINVAL;
419 }
420
421 static u32 asle_set_backlight(struct drm_device *dev, u32 bclp)
422 {
423 struct drm_i915_private *dev_priv = dev->dev_private;
424 struct intel_connector *intel_connector;
425 struct opregion_asle *asle = dev_priv->opregion.asle;
426
427 DRM_DEBUG_DRIVER("bclp = 0x%08x\n", bclp);
428
429 if (acpi_video_get_backlight_type() == acpi_backlight_native) {
430 DRM_DEBUG_KMS("opregion backlight request ignored\n");
431 return 0;
432 }
433
434 if (!(bclp & ASLE_BCLP_VALID))
435 return ASLC_BACKLIGHT_FAILED;
436
437 bclp &= ASLE_BCLP_MSK;
438 if (bclp > 255)
439 return ASLC_BACKLIGHT_FAILED;
440
441 drm_modeset_lock(&dev->mode_config.connection_mutex, NULL);
442
443 /*
444 * Update backlight on all connectors that support backlight (usually
445 * only one).
446 */
447 DRM_DEBUG_KMS("updating opregion backlight %d/255\n", bclp);
448 list_for_each_entry(intel_connector, &dev->mode_config.connector_list, base.head)
449 intel_panel_set_backlight_acpi(intel_connector, bclp, 255);
450 asle->cblv = DIV_ROUND_UP(bclp * 100, 255) | ASLE_CBLV_VALID;
451
452 drm_modeset_unlock(&dev->mode_config.connection_mutex);
453
454
455 return 0;
456 }
457
458 static u32 asle_set_als_illum(struct drm_device *dev, u32 alsi)
459 {
460 /* alsi is the current ALS reading in lux. 0 indicates below sensor
461 range, 0xffff indicates above sensor range. 1-0xfffe are valid */
462 DRM_DEBUG_DRIVER("Illum is not supported\n");
463 return ASLC_ALS_ILLUM_FAILED;
464 }
465
466 static u32 asle_set_pwm_freq(struct drm_device *dev, u32 pfmb)
467 {
468 DRM_DEBUG_DRIVER("PWM freq is not supported\n");
469 return ASLC_PWM_FREQ_FAILED;
470 }
471
472 static u32 asle_set_pfit(struct drm_device *dev, u32 pfit)
473 {
474 /* Panel fitting is currently controlled by the X code, so this is a
475 noop until modesetting support works fully */
476 DRM_DEBUG_DRIVER("Pfit is not supported\n");
477 return ASLC_PFIT_FAILED;
478 }
479
480 static u32 asle_set_supported_rotation_angles(struct drm_device *dev, u32 srot)
481 {
482 DRM_DEBUG_DRIVER("SROT is not supported\n");
483 return ASLC_ROTATION_ANGLES_FAILED;
484 }
485
486 static u32 asle_set_button_array(struct drm_device *dev, u32 iuer)
487 {
488 if (!iuer)
489 DRM_DEBUG_DRIVER("Button array event is not supported (nothing)\n");
490 if (iuer & ASLE_IUER_ROTATION_LOCK_BTN)
491 DRM_DEBUG_DRIVER("Button array event is not supported (rotation lock)\n");
492 if (iuer & ASLE_IUER_VOLUME_DOWN_BTN)
493 DRM_DEBUG_DRIVER("Button array event is not supported (volume down)\n");
494 if (iuer & ASLE_IUER_VOLUME_UP_BTN)
495 DRM_DEBUG_DRIVER("Button array event is not supported (volume up)\n");
496 if (iuer & ASLE_IUER_WINDOWS_BTN)
497 DRM_DEBUG_DRIVER("Button array event is not supported (windows)\n");
498 if (iuer & ASLE_IUER_POWER_BTN)
499 DRM_DEBUG_DRIVER("Button array event is not supported (power)\n");
500
501 return ASLC_BUTTON_ARRAY_FAILED;
502 }
503
504 static u32 asle_set_convertible(struct drm_device *dev, u32 iuer)
505 {
506 if (iuer & ASLE_IUER_CONVERTIBLE)
507 DRM_DEBUG_DRIVER("Convertible is not supported (clamshell)\n");
508 else
509 DRM_DEBUG_DRIVER("Convertible is not supported (slate)\n");
510
511 return ASLC_CONVERTIBLE_FAILED;
512 }
513
514 static u32 asle_set_docking(struct drm_device *dev, u32 iuer)
515 {
516 if (iuer & ASLE_IUER_DOCKING)
517 DRM_DEBUG_DRIVER("Docking is not supported (docked)\n");
518 else
519 DRM_DEBUG_DRIVER("Docking is not supported (undocked)\n");
520
521 return ASLC_DOCKING_FAILED;
522 }
523
524 static u32 asle_isct_state(struct drm_device *dev)
525 {
526 DRM_DEBUG_DRIVER("ISCT is not supported\n");
527 return ASLC_ISCT_STATE_FAILED;
528 }
529
530 static void asle_work(struct work_struct *work)
531 {
532 struct intel_opregion *opregion =
533 container_of(work, struct intel_opregion, asle_work);
534 struct drm_i915_private *dev_priv =
535 container_of(opregion, struct drm_i915_private, opregion);
536 struct drm_device *dev = dev_priv->dev;
537 struct opregion_asle *asle = dev_priv->opregion.asle;
538 u32 aslc_stat = 0;
539 u32 aslc_req;
540
541 if (!asle)
542 return;
543
544 aslc_req = asle->aslc;
545
546 if (!(aslc_req & ASLC_REQ_MSK)) {
547 DRM_DEBUG_DRIVER("No request on ASLC interrupt 0x%08x\n",
548 aslc_req);
549 return;
550 }
551
552 if (aslc_req & ASLC_SET_ALS_ILLUM)
553 aslc_stat |= asle_set_als_illum(dev, asle->alsi);
554
555 if (aslc_req & ASLC_SET_BACKLIGHT)
556 aslc_stat |= asle_set_backlight(dev, asle->bclp);
557
558 if (aslc_req & ASLC_SET_PFIT)
559 aslc_stat |= asle_set_pfit(dev, asle->pfit);
560
561 if (aslc_req & ASLC_SET_PWM_FREQ)
562 aslc_stat |= asle_set_pwm_freq(dev, asle->pfmb);
563
564 if (aslc_req & ASLC_SUPPORTED_ROTATION_ANGLES)
565 aslc_stat |= asle_set_supported_rotation_angles(dev,
566 asle->srot);
567
568 if (aslc_req & ASLC_BUTTON_ARRAY)
569 aslc_stat |= asle_set_button_array(dev, asle->iuer);
570
571 if (aslc_req & ASLC_CONVERTIBLE_INDICATOR)
572 aslc_stat |= asle_set_convertible(dev, asle->iuer);
573
574 if (aslc_req & ASLC_DOCKING_INDICATOR)
575 aslc_stat |= asle_set_docking(dev, asle->iuer);
576
577 if (aslc_req & ASLC_ISCT_STATE_CHANGE)
578 aslc_stat |= asle_isct_state(dev);
579
580 asle->aslc = aslc_stat;
581 }
582
583 void intel_opregion_asle_intr(struct drm_device *dev)
584 {
585 struct drm_i915_private *dev_priv = dev->dev_private;
586
587 if (dev_priv->opregion.asle)
588 schedule_work(&dev_priv->opregion.asle_work);
589 }
590
591 #define ACPI_EV_DISPLAY_SWITCH (1<<0)
592 #define ACPI_EV_LID (1<<1)
593 #define ACPI_EV_DOCK (1<<2)
594
595 static struct intel_opregion *system_opregion;
596
597 static int intel_opregion_video_event(struct notifier_block *nb,
598 unsigned long val, void *data)
599 {
600 /* The only video events relevant to opregion are 0x80. These indicate
601 either a docking event, lid switch or display switch request. In
602 Linux, these are handled by the dock, button and video drivers.
603 */
604
605 struct acpi_bus_event *event = data;
606 struct opregion_acpi *acpi;
607 int ret = NOTIFY_OK;
608
609 if (strcmp(event->device_class, ACPI_VIDEO_CLASS) != 0)
610 return NOTIFY_DONE;
611
612 if (!system_opregion)
613 return NOTIFY_DONE;
614
615 acpi = system_opregion->acpi;
616
617 if (event->type == 0x80 && ((acpi->cevt & 1) == 0))
618 ret = NOTIFY_BAD;
619
620 acpi->csts = 0;
621
622 return ret;
623 }
624
625 static struct notifier_block intel_opregion_notifier = {
626 .notifier_call = intel_opregion_video_event,
627 };
628
629 /*
630 * Initialise the DIDL field in opregion. This passes a list of devices to
631 * the firmware. Values are defined by section B.4.2 of the ACPI specification
632 * (version 3)
633 */
634
635 static u32 get_did(struct intel_opregion *opregion, int i)
636 {
637 u32 did;
638
639 if (i < ARRAY_SIZE(opregion->acpi->didl)) {
640 did = opregion->acpi->didl[i];
641 } else {
642 i -= ARRAY_SIZE(opregion->acpi->didl);
643
644 if (WARN_ON(i >= ARRAY_SIZE(opregion->acpi->did2)))
645 return 0;
646
647 did = opregion->acpi->did2[i];
648 }
649
650 return did;
651 }
652
653 static void set_did(struct intel_opregion *opregion, int i, u32 val)
654 {
655 if (i < ARRAY_SIZE(opregion->acpi->didl)) {
656 opregion->acpi->didl[i] = val;
657 } else {
658 i -= ARRAY_SIZE(opregion->acpi->didl);
659
660 if (WARN_ON(i >= ARRAY_SIZE(opregion->acpi->did2)))
661 return;
662
663 opregion->acpi->did2[i] = val;
664 }
665 }
666
667 static void intel_didl_outputs(struct drm_device *dev)
668 {
669 struct drm_i915_private *dev_priv = dev->dev_private;
670 struct intel_opregion *opregion = &dev_priv->opregion;
671 struct drm_connector *connector;
672 acpi_handle handle;
673 struct acpi_device *acpi_dev, *acpi_cdev, *acpi_video_bus = NULL;
674 unsigned long long device_id;
675 acpi_status status;
676 u32 temp, max_outputs;
677 int i = 0;
678
679 handle = ACPI_HANDLE(&dev->pdev->dev);
680 if (!handle || acpi_bus_get_device(handle, &acpi_dev))
681 return;
682
683 if (acpi_is_video_device(handle))
684 acpi_video_bus = acpi_dev;
685 else {
686 list_for_each_entry(acpi_cdev, &acpi_dev->children, node) {
687 if (acpi_is_video_device(acpi_cdev->handle)) {
688 acpi_video_bus = acpi_cdev;
689 break;
690 }
691 }
692 }
693
694 if (!acpi_video_bus) {
695 DRM_DEBUG_KMS("No ACPI video bus found\n");
696 return;
697 }
698
699 /*
700 * In theory, did2, the extended didl, gets added at opregion version
701 * 3.0. In practice, however, we're supposed to set it for earlier
702 * versions as well, since a BIOS that doesn't understand did2 should
703 * not look at it anyway. Use a variable so we can tweak this if a need
704 * arises later.
705 */
706 max_outputs = ARRAY_SIZE(opregion->acpi->didl) +
707 ARRAY_SIZE(opregion->acpi->did2);
708
709 list_for_each_entry(acpi_cdev, &acpi_video_bus->children, node) {
710 if (i >= max_outputs) {
711 DRM_DEBUG_KMS("More than %u outputs detected via ACPI\n",
712 max_outputs);
713 return;
714 }
715 status = acpi_evaluate_integer(acpi_cdev->handle, "_ADR",
716 NULL, &device_id);
717 if (ACPI_SUCCESS(status)) {
718 if (!device_id)
719 goto blind_set;
720 set_did(opregion, i++, (u32)(device_id & 0x0f0f));
721 }
722 }
723
724 end:
725 DRM_DEBUG_KMS("%d outputs detected\n", i);
726
727 /* If fewer than max outputs, the list must be null terminated */
728 if (i < max_outputs)
729 set_did(opregion, i, 0);
730 return;
731
732 blind_set:
733 i = 0;
734 list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
735 int output_type = ACPI_OTHER_OUTPUT;
736 if (i >= max_outputs) {
737 DRM_DEBUG_KMS("More than %u outputs in connector list\n",
738 max_outputs);
739 return;
740 }
741 switch (connector->connector_type) {
742 case DRM_MODE_CONNECTOR_VGA:
743 case DRM_MODE_CONNECTOR_DVIA:
744 output_type = ACPI_VGA_OUTPUT;
745 break;
746 case DRM_MODE_CONNECTOR_Composite:
747 case DRM_MODE_CONNECTOR_SVIDEO:
748 case DRM_MODE_CONNECTOR_Component:
749 case DRM_MODE_CONNECTOR_9PinDIN:
750 output_type = ACPI_TV_OUTPUT;
751 break;
752 case DRM_MODE_CONNECTOR_DVII:
753 case DRM_MODE_CONNECTOR_DVID:
754 case DRM_MODE_CONNECTOR_DisplayPort:
755 case DRM_MODE_CONNECTOR_HDMIA:
756 case DRM_MODE_CONNECTOR_HDMIB:
757 output_type = ACPI_DIGITAL_OUTPUT;
758 break;
759 case DRM_MODE_CONNECTOR_LVDS:
760 output_type = ACPI_LVDS_OUTPUT;
761 break;
762 }
763 temp = get_did(opregion, i);
764 set_did(opregion, i, temp | (1 << 31) | output_type | i);
765 i++;
766 }
767 goto end;
768 }
769
770 static void intel_setup_cadls(struct drm_device *dev)
771 {
772 struct drm_i915_private *dev_priv = dev->dev_private;
773 struct intel_opregion *opregion = &dev_priv->opregion;
774 int i = 0;
775 u32 disp_id;
776
777 /* Initialize the CADL field by duplicating the DIDL values.
778 * Technically, this is not always correct as display outputs may exist,
779 * but not active. This initialization is necessary for some Clevo
780 * laptops that check this field before processing the brightness and
781 * display switching hotkeys. Just like DIDL, CADL is NULL-terminated if
782 * there are less than eight devices. */
783 do {
784 disp_id = get_did(opregion, i);
785 opregion->acpi->cadl[i] = disp_id;
786 } while (++i < 8 && disp_id != 0);
787 }
788
789 void intel_opregion_init(struct drm_device *dev)
790 {
791 struct drm_i915_private *dev_priv = dev->dev_private;
792 struct intel_opregion *opregion = &dev_priv->opregion;
793
794 if (!opregion->header)
795 return;
796
797 if (opregion->acpi) {
798 intel_didl_outputs(dev);
799 intel_setup_cadls(dev);
800
801 /* Notify BIOS we are ready to handle ACPI video ext notifs.
802 * Right now, all the events are handled by the ACPI video module.
803 * We don't actually need to do anything with them. */
804 opregion->acpi->csts = 0;
805 opregion->acpi->drdy = 1;
806
807 system_opregion = opregion;
808 register_acpi_notifier(&intel_opregion_notifier);
809 }
810
811 if (opregion->asle) {
812 opregion->asle->tche = ASLE_TCHE_BLC_EN;
813 opregion->asle->ardy = ASLE_ARDY_READY;
814 }
815 }
816
817 void intel_opregion_fini(struct drm_device *dev)
818 {
819 struct drm_i915_private *dev_priv = dev->dev_private;
820 struct intel_opregion *opregion = &dev_priv->opregion;
821
822 if (!opregion->header)
823 return;
824
825 if (opregion->asle)
826 opregion->asle->ardy = ASLE_ARDY_NOT_READY;
827
828 cancel_work_sync(&dev_priv->opregion.asle_work);
829
830 if (opregion->acpi) {
831 opregion->acpi->drdy = 0;
832
833 system_opregion = NULL;
834 unregister_acpi_notifier(&intel_opregion_notifier);
835 }
836
837 /* just clear all opregion memory pointers now */
838 memunmap(opregion->header);
839 opregion->header = NULL;
840 opregion->acpi = NULL;
841 opregion->swsci = NULL;
842 opregion->asle = NULL;
843 opregion->vbt = NULL;
844 opregion->lid_state = NULL;
845 }
846
847 static void swsci_setup(struct drm_device *dev)
848 {
849 struct drm_i915_private *dev_priv = dev->dev_private;
850 struct intel_opregion *opregion = &dev_priv->opregion;
851 bool requested_callbacks = false;
852 u32 tmp;
853
854 /* Sub-function code 0 is okay, let's allow them. */
855 opregion->swsci_gbda_sub_functions = 1;
856 opregion->swsci_sbcb_sub_functions = 1;
857
858 /* We use GBDA to ask for supported GBDA calls. */
859 if (swsci(dev, SWSCI_GBDA_SUPPORTED_CALLS, 0, &tmp) == 0) {
860 /* make the bits match the sub-function codes */
861 tmp <<= 1;
862 opregion->swsci_gbda_sub_functions |= tmp;
863 }
864
865 /*
866 * We also use GBDA to ask for _requested_ SBCB callbacks. The driver
867 * must not call interfaces that are not specifically requested by the
868 * bios.
869 */
870 if (swsci(dev, SWSCI_GBDA_REQUESTED_CALLBACKS, 0, &tmp) == 0) {
871 /* here, the bits already match sub-function codes */
872 opregion->swsci_sbcb_sub_functions |= tmp;
873 requested_callbacks = true;
874 }
875
876 /*
877 * But we use SBCB to ask for _supported_ SBCB calls. This does not mean
878 * the callback is _requested_. But we still can't call interfaces that
879 * are not requested.
880 */
881 if (swsci(dev, SWSCI_SBCB_SUPPORTED_CALLBACKS, 0, &tmp) == 0) {
882 /* make the bits match the sub-function codes */
883 u32 low = tmp & 0x7ff;
884 u32 high = tmp & ~0xfff; /* bit 11 is reserved */
885 tmp = (high << 4) | (low << 1) | 1;
886
887 /* best guess what to do with supported wrt requested */
888 if (requested_callbacks) {
889 u32 req = opregion->swsci_sbcb_sub_functions;
890 if ((req & tmp) != req)
891 DRM_DEBUG_DRIVER("SWSCI BIOS requested (%08x) SBCB callbacks that are not supported (%08x)\n", req, tmp);
892 /* XXX: for now, trust the requested callbacks */
893 /* opregion->swsci_sbcb_sub_functions &= tmp; */
894 } else {
895 opregion->swsci_sbcb_sub_functions |= tmp;
896 }
897 }
898
899 DRM_DEBUG_DRIVER("SWSCI GBDA callbacks %08x, SBCB callbacks %08x\n",
900 opregion->swsci_gbda_sub_functions,
901 opregion->swsci_sbcb_sub_functions);
902 }
903 #else /* CONFIG_ACPI */
904 static inline void swsci_setup(struct drm_device *dev) {}
905 #endif /* CONFIG_ACPI */
906
907 int intel_opregion_setup(struct drm_device *dev)
908 {
909 struct drm_i915_private *dev_priv = dev->dev_private;
910 struct intel_opregion *opregion = &dev_priv->opregion;
911 u32 asls, mboxes;
912 char buf[sizeof(OPREGION_SIGNATURE)];
913 int err = 0;
914 void *base;
915
916 BUILD_BUG_ON(sizeof(struct opregion_header) != 0x100);
917 BUILD_BUG_ON(sizeof(struct opregion_acpi) != 0x100);
918 BUILD_BUG_ON(sizeof(struct opregion_swsci) != 0x100);
919 BUILD_BUG_ON(sizeof(struct opregion_asle) != 0x100);
920 BUILD_BUG_ON(sizeof(struct opregion_asle_ext) != 0x400);
921
922 pci_read_config_dword(dev->pdev, PCI_ASLS, &asls);
923 DRM_DEBUG_DRIVER("graphic opregion physical addr: 0x%x\n", asls);
924 if (asls == 0) {
925 DRM_DEBUG_DRIVER("ACPI OpRegion not supported!\n");
926 return -ENOTSUPP;
927 }
928
929 #ifdef CONFIG_ACPI
930 INIT_WORK(&opregion->asle_work, asle_work);
931 #endif
932
933 base = memremap(asls, OPREGION_SIZE, MEMREMAP_WB);
934 if (!base)
935 return -ENOMEM;
936
937 memcpy(buf, base, sizeof(buf));
938
939 if (memcmp(buf, OPREGION_SIGNATURE, 16)) {
940 DRM_DEBUG_DRIVER("opregion signature mismatch\n");
941 err = -EINVAL;
942 goto err_out;
943 }
944 opregion->header = base;
945 opregion->vbt = base + OPREGION_VBT_OFFSET;
946
947 opregion->lid_state = base + ACPI_CLID;
948
949 mboxes = opregion->header->mboxes;
950 if (mboxes & MBOX_ACPI) {
951 DRM_DEBUG_DRIVER("Public ACPI methods supported\n");
952 opregion->acpi = base + OPREGION_ACPI_OFFSET;
953 }
954
955 if (mboxes & MBOX_SWSCI) {
956 DRM_DEBUG_DRIVER("SWSCI supported\n");
957 opregion->swsci = base + OPREGION_SWSCI_OFFSET;
958 swsci_setup(dev);
959 }
960
961 if (mboxes & MBOX_ASLE) {
962 DRM_DEBUG_DRIVER("ASLE supported\n");
963 opregion->asle = base + OPREGION_ASLE_OFFSET;
964
965 opregion->asle->ardy = ASLE_ARDY_NOT_READY;
966 }
967
968 if (mboxes & MBOX_ASLE_EXT)
969 DRM_DEBUG_DRIVER("ASLE extension supported\n");
970
971 return 0;
972
973 err_out:
974 memunmap(base);
975 return err;
976 }
Linux kernel - Deliverables
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