1 /*
2 * Copyright 2008 Intel Corporation <hong.liu@intel.com>
3 * Copyright 2008 Red Hat <mjg@redhat.com>
4 *
5 * Permission is hereby granted, free of charge, to any person obtaining
6 * a copy of this software and associated documentation files (the
7 * "Software"), to deal in the Software without restriction, including
8 * without limitation the rights to use, copy, modify, merge, publish,
9 * distribute, sub license, and/or sell copies of the Software, and to
10 * permit persons to whom the Software is furnished to do so, subject to
11 * the following conditions:
12 *
13 * The above copyright notice and this permission notice (including the
14 * next paragraph) shall be included in all copies or substantial
15 * portions of the Software.
16 *
17 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
18 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
19 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
20 * NON-INFRINGEMENT. IN NO EVENT SHALL INTEL AND/OR ITS SUPPLIERS BE
21 * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
22 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
23 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
24 * SOFTWARE.
25 *
26 */
27
28 #include <linux/acpi.h>
29 #include <linux/dmi.h>
30 #include <linux/firmware.h>
31 #include <acpi/video.h>
32
33 #include <drm/drm_edid.h>
34
35 #include "i915_drv.h"
36 #include "intel_acpi.h"
37 #include "intel_backlight.h"
38 #include "intel_display_types.h"
39 #include "intel_opregion.h"
40 #include "intel_pci_config.h"
41
42 #define OPREGION_HEADER_OFFSET 0
43 #define OPREGION_ACPI_OFFSET 0x100
44 #define ACPI_CLID 0x01ac /* current lid state indicator */
45 #define ACPI_CDCK 0x01b0 /* current docking state indicator */
46 #define OPREGION_SWSCI_OFFSET 0x200
47 #define OPREGION_ASLE_OFFSET 0x300
48 #define OPREGION_VBT_OFFSET 0x400
49 #define OPREGION_ASLE_EXT_OFFSET 0x1C00
50
51 #define OPREGION_SIGNATURE "IntelGraphicsMem"
52 #define MBOX_ACPI BIT(0) /* Mailbox #1 */
53 #define MBOX_SWSCI BIT(1) /* Mailbox #2 (obsolete from v2.x) */
54 #define MBOX_ASLE BIT(2) /* Mailbox #3 */
55 #define MBOX_ASLE_EXT BIT(4) /* Mailbox #5 */
56 #define MBOX_BACKLIGHT BIT(5) /* Mailbox #2 (valid from v3.x) */
57
58 #define PCON_HEADLESS_SKU BIT(13)
59
60 struct opregion_header {
61 u8 signature[16];
62 u32 size;
63 struct {
64 u8 rsvd;
65 u8 revision;
66 u8 minor;
67 u8 major;
68 } __packed over;
69 u8 bios_ver[32];
70 u8 vbios_ver[16];
71 u8 driver_ver[16];
72 u32 mboxes;
73 u32 driver_model;
74 u32 pcon;
75 u8 dver[32];
76 u8 rsvd[124];
77 } __packed;
78
79 /* OpRegion mailbox #1: public ACPI methods */
80 struct opregion_acpi {
81 u32 drdy; /* driver readiness */
82 u32 csts; /* notification status */
83 u32 cevt; /* current event */
84 u8 rsvd1[20];
85 u32 didl[8]; /* supported display devices ID list */
86 u32 cpdl[8]; /* currently presented display list */
87 u32 cadl[8]; /* currently active display list */
88 u32 nadl[8]; /* next active devices list */
89 u32 aslp; /* ASL sleep time-out */
90 u32 tidx; /* toggle table index */
91 u32 chpd; /* current hotplug enable indicator */
92 u32 clid; /* current lid state*/
93 u32 cdck; /* current docking state */
94 u32 sxsw; /* Sx state resume */
95 u32 evts; /* ASL supported events */
96 u32 cnot; /* current OS notification */
97 u32 nrdy; /* driver status */
98 u32 did2[7]; /* extended supported display devices ID list */
99 u32 cpd2[7]; /* extended attached display devices list */
100 u8 rsvd2[4];
101 } __packed;
102
103 /* OpRegion mailbox #2: SWSCI */
104 struct opregion_swsci {
105 u32 scic; /* SWSCI command|status|data */
106 u32 parm; /* command parameters */
107 u32 dslp; /* driver sleep time-out */
108 u8 rsvd[244];
109 } __packed;
110
111 /* OpRegion mailbox #3: ASLE */
112 struct opregion_asle {
113 u32 ardy; /* driver readiness */
114 u32 aslc; /* ASLE interrupt command */
115 u32 tche; /* technology enabled indicator */
116 u32 alsi; /* current ALS illuminance reading */
117 u32 bclp; /* backlight brightness to set */
118 u32 pfit; /* panel fitting state */
119 u32 cblv; /* current brightness level */
120 u16 bclm[20]; /* backlight level duty cycle mapping table */
121 u32 cpfm; /* current panel fitting mode */
122 u32 epfm; /* enabled panel fitting modes */
123 u8 plut[74]; /* panel LUT and identifier */
124 u32 pfmb; /* PWM freq and min brightness */
125 u32 cddv; /* color correction default values */
126 u32 pcft; /* power conservation features */
127 u32 srot; /* supported rotation angles */
128 u32 iuer; /* IUER events */
129 u64 fdss;
130 u32 fdsp;
131 u32 stat;
132 u64 rvda; /* Physical (2.0) or relative from opregion (2.1+)
133 * address of raw VBT data. */
134 u32 rvds; /* Size of raw vbt data */
135 u8 rsvd[58];
136 } __packed;
137
138 /* OpRegion mailbox #5: ASLE ext */
139 struct opregion_asle_ext {
140 u32 phed; /* Panel Header */
141 u8 bddc[256]; /* Panel EDID */
142 u8 rsvd[764];
143 } __packed;
144
145 /* Driver readiness indicator */
146 #define ASLE_ARDY_READY (1 << 0)
147 #define ASLE_ARDY_NOT_READY (0 << 0)
148
149 /* ASLE Interrupt Command (ASLC) bits */
150 #define ASLC_SET_ALS_ILLUM (1 << 0)
151 #define ASLC_SET_BACKLIGHT (1 << 1)
152 #define ASLC_SET_PFIT (1 << 2)
153 #define ASLC_SET_PWM_FREQ (1 << 3)
154 #define ASLC_SUPPORTED_ROTATION_ANGLES (1 << 4)
155 #define ASLC_BUTTON_ARRAY (1 << 5)
156 #define ASLC_CONVERTIBLE_INDICATOR (1 << 6)
157 #define ASLC_DOCKING_INDICATOR (1 << 7)
158 #define ASLC_ISCT_STATE_CHANGE (1 << 8)
159 #define ASLC_REQ_MSK 0x1ff
160 /* response bits */
161 #define ASLC_ALS_ILLUM_FAILED (1 << 10)
162 #define ASLC_BACKLIGHT_FAILED (1 << 12)
163 #define ASLC_PFIT_FAILED (1 << 14)
164 #define ASLC_PWM_FREQ_FAILED (1 << 16)
165 #define ASLC_ROTATION_ANGLES_FAILED (1 << 18)
166 #define ASLC_BUTTON_ARRAY_FAILED (1 << 20)
167 #define ASLC_CONVERTIBLE_FAILED (1 << 22)
168 #define ASLC_DOCKING_FAILED (1 << 24)
169 #define ASLC_ISCT_STATE_FAILED (1 << 26)
170
171 /* Technology enabled indicator */
172 #define ASLE_TCHE_ALS_EN (1 << 0)
173 #define ASLE_TCHE_BLC_EN (1 << 1)
174 #define ASLE_TCHE_PFIT_EN (1 << 2)
175 #define ASLE_TCHE_PFMB_EN (1 << 3)
176
177 /* ASLE backlight brightness to set */
178 #define ASLE_BCLP_VALID (1<<31)
179 #define ASLE_BCLP_MSK (~(1<<31))
180
181 /* ASLE panel fitting request */
182 #define ASLE_PFIT_VALID (1<<31)
183 #define ASLE_PFIT_CENTER (1<<0)
184 #define ASLE_PFIT_STRETCH_TEXT (1<<1)
185 #define ASLE_PFIT_STRETCH_GFX (1<<2)
186
187 /* PWM frequency and minimum brightness */
188 #define ASLE_PFMB_BRIGHTNESS_MASK (0xff)
189 #define ASLE_PFMB_BRIGHTNESS_VALID (1<<8)
190 #define ASLE_PFMB_PWM_MASK (0x7ffffe00)
191 #define ASLE_PFMB_PWM_VALID (1<<31)
192
193 #define ASLE_CBLV_VALID (1<<31)
194
195 /* IUER */
196 #define ASLE_IUER_DOCKING (1 << 7)
197 #define ASLE_IUER_CONVERTIBLE (1 << 6)
198 #define ASLE_IUER_ROTATION_LOCK_BTN (1 << 4)
199 #define ASLE_IUER_VOLUME_DOWN_BTN (1 << 3)
200 #define ASLE_IUER_VOLUME_UP_BTN (1 << 2)
201 #define ASLE_IUER_WINDOWS_BTN (1 << 1)
202 #define ASLE_IUER_POWER_BTN (1 << 0)
203
204 #define ASLE_PHED_EDID_VALID_MASK 0x3
205
206 /* Software System Control Interrupt (SWSCI) */
207 #define SWSCI_SCIC_INDICATOR (1 << 0)
208 #define SWSCI_SCIC_MAIN_FUNCTION_SHIFT 1
209 #define SWSCI_SCIC_MAIN_FUNCTION_MASK (0xf << 1)
210 #define SWSCI_SCIC_SUB_FUNCTION_SHIFT 8
211 #define SWSCI_SCIC_SUB_FUNCTION_MASK (0xff << 8)
212 #define SWSCI_SCIC_EXIT_PARAMETER_SHIFT 8
213 #define SWSCI_SCIC_EXIT_PARAMETER_MASK (0xff << 8)
214 #define SWSCI_SCIC_EXIT_STATUS_SHIFT 5
215 #define SWSCI_SCIC_EXIT_STATUS_MASK (7 << 5)
216 #define SWSCI_SCIC_EXIT_STATUS_SUCCESS 1
217
218 #define SWSCI_FUNCTION_CODE(main, sub) \
219 ((main) << SWSCI_SCIC_MAIN_FUNCTION_SHIFT | \
220 (sub) << SWSCI_SCIC_SUB_FUNCTION_SHIFT)
221
222 /* SWSCI: Get BIOS Data (GBDA) */
223 #define SWSCI_GBDA 4
224 #define SWSCI_GBDA_SUPPORTED_CALLS SWSCI_FUNCTION_CODE(SWSCI_GBDA, 0)
225 #define SWSCI_GBDA_REQUESTED_CALLBACKS SWSCI_FUNCTION_CODE(SWSCI_GBDA, 1)
226 #define SWSCI_GBDA_BOOT_DISPLAY_PREF SWSCI_FUNCTION_CODE(SWSCI_GBDA, 4)
227 #define SWSCI_GBDA_PANEL_DETAILS SWSCI_FUNCTION_CODE(SWSCI_GBDA, 5)
228 #define SWSCI_GBDA_TV_STANDARD SWSCI_FUNCTION_CODE(SWSCI_GBDA, 6)
229 #define SWSCI_GBDA_INTERNAL_GRAPHICS SWSCI_FUNCTION_CODE(SWSCI_GBDA, 7)
230 #define SWSCI_GBDA_SPREAD_SPECTRUM SWSCI_FUNCTION_CODE(SWSCI_GBDA, 10)
231
232 /* SWSCI: System BIOS Callbacks (SBCB) */
233 #define SWSCI_SBCB 6
234 #define SWSCI_SBCB_SUPPORTED_CALLBACKS SWSCI_FUNCTION_CODE(SWSCI_SBCB, 0)
235 #define SWSCI_SBCB_INIT_COMPLETION SWSCI_FUNCTION_CODE(SWSCI_SBCB, 1)
236 #define SWSCI_SBCB_PRE_HIRES_SET_MODE SWSCI_FUNCTION_CODE(SWSCI_SBCB, 3)
237 #define SWSCI_SBCB_POST_HIRES_SET_MODE SWSCI_FUNCTION_CODE(SWSCI_SBCB, 4)
238 #define SWSCI_SBCB_DISPLAY_SWITCH SWSCI_FUNCTION_CODE(SWSCI_SBCB, 5)
239 #define SWSCI_SBCB_SET_TV_FORMAT SWSCI_FUNCTION_CODE(SWSCI_SBCB, 6)
240 #define SWSCI_SBCB_ADAPTER_POWER_STATE SWSCI_FUNCTION_CODE(SWSCI_SBCB, 7)
241 #define SWSCI_SBCB_DISPLAY_POWER_STATE SWSCI_FUNCTION_CODE(SWSCI_SBCB, 8)
242 #define SWSCI_SBCB_SET_BOOT_DISPLAY SWSCI_FUNCTION_CODE(SWSCI_SBCB, 9)
243 #define SWSCI_SBCB_SET_PANEL_DETAILS SWSCI_FUNCTION_CODE(SWSCI_SBCB, 10)
244 #define SWSCI_SBCB_SET_INTERNAL_GFX SWSCI_FUNCTION_CODE(SWSCI_SBCB, 11)
245 #define SWSCI_SBCB_POST_HIRES_TO_DOS_FS SWSCI_FUNCTION_CODE(SWSCI_SBCB, 16)
246 #define SWSCI_SBCB_SUSPEND_RESUME SWSCI_FUNCTION_CODE(SWSCI_SBCB, 17)
247 #define SWSCI_SBCB_SET_SPREAD_SPECTRUM SWSCI_FUNCTION_CODE(SWSCI_SBCB, 18)
248 #define SWSCI_SBCB_POST_VBE_PM SWSCI_FUNCTION_CODE(SWSCI_SBCB, 19)
249 #define SWSCI_SBCB_ENABLE_DISABLE_AUDIO SWSCI_FUNCTION_CODE(SWSCI_SBCB, 21)
250
251 #define MAX_DSLP 1500
252
check_swsci_function(struct drm_i915_private * i915,u32 function)253 static int check_swsci_function(struct drm_i915_private *i915, u32 function)
254 {
255 struct opregion_swsci *swsci = i915->display.opregion.swsci;
256 u32 main_function, sub_function;
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 ((i915->display.opregion.swsci_sbcb_sub_functions &
269 (1 << sub_function)) == 0)
270 return -EINVAL;
271 } else if (main_function == SWSCI_GBDA) {
272 if ((i915->display.opregion.swsci_gbda_sub_functions &
273 (1 << sub_function)) == 0)
274 return -EINVAL;
275 }
276
277 return 0;
278 }
279
swsci(struct drm_i915_private * dev_priv,u32 function,u32 parm,u32 * parm_out)280 static int swsci(struct drm_i915_private *dev_priv,
281 u32 function, u32 parm, u32 *parm_out)
282 {
283 struct opregion_swsci *swsci = dev_priv->display.opregion.swsci;
284 struct pci_dev *pdev = dev_priv->drm.pdev;
285 u32 scic, dslp;
286 u16 swsci_val;
287 int ret;
288
289 ret = check_swsci_function(dev_priv, function);
290 if (ret)
291 return ret;
292
293 /* Driver sleep timeout in ms. */
294 dslp = swsci->dslp;
295 if (!dslp) {
296 /* The spec says 2ms should be the default, but it's too small
297 * for some machines. */
298 dslp = 50;
299 } else if (dslp > MAX_DSLP) {
300 /* Hey bios, trust must be earned. */
301 DRM_INFO_ONCE("ACPI BIOS requests an excessive sleep of %u ms, "
302 "using %u ms instead\n", dslp, MAX_DSLP);
303 dslp = MAX_DSLP;
304 }
305
306 /* The spec tells us to do this, but we are the only user... */
307 scic = swsci->scic;
308 if (scic & SWSCI_SCIC_INDICATOR) {
309 drm_dbg(&dev_priv->drm, "SWSCI request already in progress\n");
310 return -EBUSY;
311 }
312
313 scic = function | SWSCI_SCIC_INDICATOR;
314
315 swsci->parm = parm;
316 swsci->scic = scic;
317
318 /* Ensure SCI event is selected and event trigger is cleared. */
319 pci_read_config_word(pdev, SWSCI, &swsci_val);
320 if (!(swsci_val & SWSCI_SCISEL) || (swsci_val & SWSCI_GSSCIE)) {
321 swsci_val |= SWSCI_SCISEL;
322 swsci_val &= ~SWSCI_GSSCIE;
323 pci_write_config_word(pdev, SWSCI, swsci_val);
324 }
325
326 /* Use event trigger to tell bios to check the mail. */
327 swsci_val |= SWSCI_GSSCIE;
328 pci_write_config_word(pdev, SWSCI, swsci_val);
329
330 /* Poll for the result. */
331 #define C (((scic = swsci->scic) & SWSCI_SCIC_INDICATOR) == 0)
332 if (wait_for(C, dslp)) {
333 drm_dbg(&dev_priv->drm, "SWSCI request timed out\n");
334 return -ETIMEDOUT;
335 }
336
337 scic = (scic & SWSCI_SCIC_EXIT_STATUS_MASK) >>
338 SWSCI_SCIC_EXIT_STATUS_SHIFT;
339
340 /* Note: scic == 0 is an error! */
341 if (scic != SWSCI_SCIC_EXIT_STATUS_SUCCESS) {
342 drm_dbg(&dev_priv->drm, "SWSCI request error %u\n", scic);
343 return -EIO;
344 }
345
346 if (parm_out)
347 *parm_out = swsci->parm;
348
349 return 0;
350
351 #undef C
352 }
353
354 #define DISPLAY_TYPE_CRT 0
355 #define DISPLAY_TYPE_TV 1
356 #define DISPLAY_TYPE_EXTERNAL_FLAT_PANEL 2
357 #define DISPLAY_TYPE_INTERNAL_FLAT_PANEL 3
358
intel_opregion_notify_encoder(struct intel_encoder * intel_encoder,bool enable)359 int intel_opregion_notify_encoder(struct intel_encoder *intel_encoder,
360 bool enable)
361 {
362 struct drm_i915_private *dev_priv = to_i915(intel_encoder->base.dev);
363 u32 parm = 0;
364 u32 type = 0;
365 u32 port;
366 int ret;
367
368 /* don't care about old stuff for now */
369 if (!HAS_DDI(dev_priv))
370 return 0;
371
372 /* Avoid port out of bounds checks if SWSCI isn't there. */
373 ret = check_swsci_function(dev_priv, SWSCI_SBCB_DISPLAY_POWER_STATE);
374 if (ret)
375 return ret;
376
377 if (intel_encoder->type == INTEL_OUTPUT_DSI)
378 port = 0;
379 else
380 port = intel_encoder->port;
381
382 if (port == PORT_E) {
383 port = 0;
384 } else {
385 parm |= 1 << port;
386 port++;
387 }
388
389 /*
390 * The port numbering and mapping here is bizarre. The now-obsolete
391 * swsci spec supports ports numbered [0..4]. Port E is handled as a
392 * special case, but port F and beyond are not. The functionality is
393 * supposed to be obsolete for new platforms. Just bail out if the port
394 * number is out of bounds after mapping.
395 */
396 if (port > 4) {
397 drm_dbg_kms(&dev_priv->drm,
398 "[ENCODER:%d:%s] port %c (index %u) out of bounds for display power state notification\n",
399 intel_encoder->base.base.id, intel_encoder->base.name,
400 port_name(intel_encoder->port), port);
401 return -EINVAL;
402 }
403
404 if (!enable)
405 parm |= 4 << 8;
406
407 switch (intel_encoder->type) {
408 case INTEL_OUTPUT_ANALOG:
409 type = DISPLAY_TYPE_CRT;
410 break;
411 case INTEL_OUTPUT_DDI:
412 case INTEL_OUTPUT_DP:
413 case INTEL_OUTPUT_HDMI:
414 case INTEL_OUTPUT_DP_MST:
415 type = DISPLAY_TYPE_EXTERNAL_FLAT_PANEL;
416 break;
417 case INTEL_OUTPUT_EDP:
418 case INTEL_OUTPUT_DSI:
419 type = DISPLAY_TYPE_INTERNAL_FLAT_PANEL;
420 break;
421 default:
422 drm_WARN_ONCE(&dev_priv->drm, 1,
423 "unsupported intel_encoder type %d\n",
424 intel_encoder->type);
425 return -EINVAL;
426 }
427
428 parm |= type << (16 + port * 3);
429
430 return swsci(dev_priv, SWSCI_SBCB_DISPLAY_POWER_STATE, parm, NULL);
431 }
432
433 static const struct {
434 pci_power_t pci_power_state;
435 u32 parm;
436 } power_state_map[] = {
437 { PCI_D0, 0x00 },
438 { PCI_D1, 0x01 },
439 { PCI_D2, 0x02 },
440 { PCI_D3hot, 0x04 },
441 { PCI_D3cold, 0x04 },
442 };
443
intel_opregion_notify_adapter(struct drm_i915_private * dev_priv,pci_power_t state)444 int intel_opregion_notify_adapter(struct drm_i915_private *dev_priv,
445 pci_power_t state)
446 {
447 int i;
448
449 if (!HAS_DDI(dev_priv))
450 return 0;
451
452 for (i = 0; i < ARRAY_SIZE(power_state_map); i++) {
453 if (state == power_state_map[i].pci_power_state)
454 return swsci(dev_priv, SWSCI_SBCB_ADAPTER_POWER_STATE,
455 power_state_map[i].parm, NULL);
456 }
457
458 return -EINVAL;
459 }
460
asle_set_backlight(struct drm_i915_private * dev_priv,u32 bclp)461 static u32 asle_set_backlight(struct drm_i915_private *dev_priv, u32 bclp)
462 {
463 struct intel_connector *connector;
464 struct drm_connector_list_iter conn_iter;
465 struct opregion_asle *asle = dev_priv->display.opregion.asle;
466
467 drm_dbg(&dev_priv->drm, "bclp = 0x%08x\n", bclp);
468
469 #ifdef __linux__
470 if (acpi_video_get_backlight_type() == acpi_backlight_native) {
471 drm_dbg_kms(&dev_priv->drm,
472 "opregion backlight request ignored\n");
473 return 0;
474 }
475 #endif
476
477 if (!(bclp & ASLE_BCLP_VALID))
478 return ASLC_BACKLIGHT_FAILED;
479
480 bclp &= ASLE_BCLP_MSK;
481 if (bclp > 255)
482 return ASLC_BACKLIGHT_FAILED;
483
484 drm_modeset_lock(&dev_priv->drm.mode_config.connection_mutex, NULL);
485
486 /*
487 * Update backlight on all connectors that support backlight (usually
488 * only one).
489 */
490 drm_dbg_kms(&dev_priv->drm, "updating opregion backlight %d/255\n",
491 bclp);
492 drm_connector_list_iter_begin(&dev_priv->drm, &conn_iter);
493 for_each_intel_connector_iter(connector, &conn_iter)
494 intel_backlight_set_acpi(connector->base.state, bclp, 255);
495 drm_connector_list_iter_end(&conn_iter);
496 asle->cblv = DIV_ROUND_UP(bclp * 100, 255) | ASLE_CBLV_VALID;
497
498 drm_modeset_unlock(&dev_priv->drm.mode_config.connection_mutex);
499
500
501 return 0;
502 }
503
asle_set_als_illum(struct drm_i915_private * dev_priv,u32 alsi)504 static u32 asle_set_als_illum(struct drm_i915_private *dev_priv, u32 alsi)
505 {
506 /* alsi is the current ALS reading in lux. 0 indicates below sensor
507 range, 0xffff indicates above sensor range. 1-0xfffe are valid */
508 drm_dbg(&dev_priv->drm, "Illum is not supported\n");
509 return ASLC_ALS_ILLUM_FAILED;
510 }
511
asle_set_pwm_freq(struct drm_i915_private * dev_priv,u32 pfmb)512 static u32 asle_set_pwm_freq(struct drm_i915_private *dev_priv, u32 pfmb)
513 {
514 drm_dbg(&dev_priv->drm, "PWM freq is not supported\n");
515 return ASLC_PWM_FREQ_FAILED;
516 }
517
asle_set_pfit(struct drm_i915_private * dev_priv,u32 pfit)518 static u32 asle_set_pfit(struct drm_i915_private *dev_priv, u32 pfit)
519 {
520 /* Panel fitting is currently controlled by the X code, so this is a
521 noop until modesetting support works fully */
522 drm_dbg(&dev_priv->drm, "Pfit is not supported\n");
523 return ASLC_PFIT_FAILED;
524 }
525
asle_set_supported_rotation_angles(struct drm_i915_private * dev_priv,u32 srot)526 static u32 asle_set_supported_rotation_angles(struct drm_i915_private *dev_priv, u32 srot)
527 {
528 drm_dbg(&dev_priv->drm, "SROT is not supported\n");
529 return ASLC_ROTATION_ANGLES_FAILED;
530 }
531
asle_set_button_array(struct drm_i915_private * dev_priv,u32 iuer)532 static u32 asle_set_button_array(struct drm_i915_private *dev_priv, u32 iuer)
533 {
534 if (!iuer)
535 drm_dbg(&dev_priv->drm,
536 "Button array event is not supported (nothing)\n");
537 if (iuer & ASLE_IUER_ROTATION_LOCK_BTN)
538 drm_dbg(&dev_priv->drm,
539 "Button array event is not supported (rotation lock)\n");
540 if (iuer & ASLE_IUER_VOLUME_DOWN_BTN)
541 drm_dbg(&dev_priv->drm,
542 "Button array event is not supported (volume down)\n");
543 if (iuer & ASLE_IUER_VOLUME_UP_BTN)
544 drm_dbg(&dev_priv->drm,
545 "Button array event is not supported (volume up)\n");
546 if (iuer & ASLE_IUER_WINDOWS_BTN)
547 drm_dbg(&dev_priv->drm,
548 "Button array event is not supported (windows)\n");
549 if (iuer & ASLE_IUER_POWER_BTN)
550 drm_dbg(&dev_priv->drm,
551 "Button array event is not supported (power)\n");
552
553 return ASLC_BUTTON_ARRAY_FAILED;
554 }
555
asle_set_convertible(struct drm_i915_private * dev_priv,u32 iuer)556 static u32 asle_set_convertible(struct drm_i915_private *dev_priv, u32 iuer)
557 {
558 if (iuer & ASLE_IUER_CONVERTIBLE)
559 drm_dbg(&dev_priv->drm,
560 "Convertible is not supported (clamshell)\n");
561 else
562 drm_dbg(&dev_priv->drm,
563 "Convertible is not supported (slate)\n");
564
565 return ASLC_CONVERTIBLE_FAILED;
566 }
567
asle_set_docking(struct drm_i915_private * dev_priv,u32 iuer)568 static u32 asle_set_docking(struct drm_i915_private *dev_priv, u32 iuer)
569 {
570 if (iuer & ASLE_IUER_DOCKING)
571 drm_dbg(&dev_priv->drm, "Docking is not supported (docked)\n");
572 else
573 drm_dbg(&dev_priv->drm,
574 "Docking is not supported (undocked)\n");
575
576 return ASLC_DOCKING_FAILED;
577 }
578
asle_isct_state(struct drm_i915_private * dev_priv)579 static u32 asle_isct_state(struct drm_i915_private *dev_priv)
580 {
581 drm_dbg(&dev_priv->drm, "ISCT is not supported\n");
582 return ASLC_ISCT_STATE_FAILED;
583 }
584
asle_work(struct work_struct * work)585 static void asle_work(struct work_struct *work)
586 {
587 struct intel_opregion *opregion =
588 container_of(work, struct intel_opregion, asle_work);
589 struct drm_i915_private *dev_priv =
590 container_of(opregion, struct drm_i915_private, display.opregion);
591 struct opregion_asle *asle = dev_priv->display.opregion.asle;
592 u32 aslc_stat = 0;
593 u32 aslc_req;
594
595 if (!asle)
596 return;
597
598 aslc_req = asle->aslc;
599
600 if (!(aslc_req & ASLC_REQ_MSK)) {
601 drm_dbg(&dev_priv->drm,
602 "No request on ASLC interrupt 0x%08x\n", aslc_req);
603 return;
604 }
605
606 if (aslc_req & ASLC_SET_ALS_ILLUM)
607 aslc_stat |= asle_set_als_illum(dev_priv, asle->alsi);
608
609 if (aslc_req & ASLC_SET_BACKLIGHT)
610 aslc_stat |= asle_set_backlight(dev_priv, asle->bclp);
611
612 if (aslc_req & ASLC_SET_PFIT)
613 aslc_stat |= asle_set_pfit(dev_priv, asle->pfit);
614
615 if (aslc_req & ASLC_SET_PWM_FREQ)
616 aslc_stat |= asle_set_pwm_freq(dev_priv, asle->pfmb);
617
618 if (aslc_req & ASLC_SUPPORTED_ROTATION_ANGLES)
619 aslc_stat |= asle_set_supported_rotation_angles(dev_priv,
620 asle->srot);
621
622 if (aslc_req & ASLC_BUTTON_ARRAY)
623 aslc_stat |= asle_set_button_array(dev_priv, asle->iuer);
624
625 if (aslc_req & ASLC_CONVERTIBLE_INDICATOR)
626 aslc_stat |= asle_set_convertible(dev_priv, asle->iuer);
627
628 if (aslc_req & ASLC_DOCKING_INDICATOR)
629 aslc_stat |= asle_set_docking(dev_priv, asle->iuer);
630
631 if (aslc_req & ASLC_ISCT_STATE_CHANGE)
632 aslc_stat |= asle_isct_state(dev_priv);
633
634 asle->aslc = aslc_stat;
635 }
636
intel_opregion_asle_intr(struct drm_i915_private * dev_priv)637 void intel_opregion_asle_intr(struct drm_i915_private *dev_priv)
638 {
639 if (dev_priv->display.opregion.asle)
640 queue_work(dev_priv->unordered_wq,
641 &dev_priv->display.opregion.asle_work);
642 }
643
644 #define ACPI_EV_DISPLAY_SWITCH (1<<0)
645 #define ACPI_EV_LID (1<<1)
646 #define ACPI_EV_DOCK (1<<2)
647
648 #ifdef notyet
649
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
677 /*
678 * Initialise the DIDL field in opregion. This passes a list of devices to
679 * the firmware. Values are defined by section B.4.2 of the ACPI specification
680 * (version 3)
681 */
682
set_did(struct intel_opregion * opregion,int i,u32 val)683 static void set_did(struct intel_opregion *opregion, int i, u32 val)
684 {
685 if (i < ARRAY_SIZE(opregion->acpi->didl)) {
686 opregion->acpi->didl[i] = val;
687 } else {
688 i -= ARRAY_SIZE(opregion->acpi->didl);
689
690 if (WARN_ON(i >= ARRAY_SIZE(opregion->acpi->did2)))
691 return;
692
693 opregion->acpi->did2[i] = val;
694 }
695 }
696
intel_didl_outputs(struct drm_i915_private * dev_priv)697 static void intel_didl_outputs(struct drm_i915_private *dev_priv)
698 {
699 struct intel_opregion *opregion = &dev_priv->display.opregion;
700 struct intel_connector *connector;
701 struct drm_connector_list_iter conn_iter;
702 int i = 0, max_outputs;
703
704 /*
705 * In theory, did2, the extended didl, gets added at opregion version
706 * 3.0. In practice, however, we're supposed to set it for earlier
707 * versions as well, since a BIOS that doesn't understand did2 should
708 * not look at it anyway. Use a variable so we can tweak this if a need
709 * arises later.
710 */
711 max_outputs = ARRAY_SIZE(opregion->acpi->didl) +
712 ARRAY_SIZE(opregion->acpi->did2);
713
714 intel_acpi_device_id_update(dev_priv);
715
716 drm_connector_list_iter_begin(&dev_priv->drm, &conn_iter);
717 for_each_intel_connector_iter(connector, &conn_iter) {
718 if (i < max_outputs)
719 set_did(opregion, i, connector->acpi_device_id);
720 i++;
721 }
722 drm_connector_list_iter_end(&conn_iter);
723
724 drm_dbg_kms(&dev_priv->drm, "%d outputs detected\n", i);
725
726 if (i > max_outputs)
727 drm_err(&dev_priv->drm,
728 "More than %d outputs in connector list\n",
729 max_outputs);
730
731 /* If fewer than max outputs, the list must be null terminated */
732 if (i < max_outputs)
733 set_did(opregion, i, 0);
734 }
735
intel_setup_cadls(struct drm_i915_private * dev_priv)736 static void intel_setup_cadls(struct drm_i915_private *dev_priv)
737 {
738 struct intel_opregion *opregion = &dev_priv->display.opregion;
739 struct intel_connector *connector;
740 struct drm_connector_list_iter conn_iter;
741 int i = 0;
742
743 /*
744 * Initialize the CADL field from the connector device ids. This is
745 * essentially the same as copying from the DIDL. Technically, this is
746 * not always correct as display outputs may exist, but not active. This
747 * initialization is necessary for some Clevo laptops that check this
748 * field before processing the brightness and display switching hotkeys.
749 *
750 * Note that internal panels should be at the front of the connector
751 * list already, ensuring they're not left out.
752 */
753 drm_connector_list_iter_begin(&dev_priv->drm, &conn_iter);
754 for_each_intel_connector_iter(connector, &conn_iter) {
755 if (i >= ARRAY_SIZE(opregion->acpi->cadl))
756 break;
757 opregion->acpi->cadl[i++] = connector->acpi_device_id;
758 }
759 drm_connector_list_iter_end(&conn_iter);
760
761 /* If fewer than 8 active devices, the list must be null terminated */
762 if (i < ARRAY_SIZE(opregion->acpi->cadl))
763 opregion->acpi->cadl[i] = 0;
764 }
765
766 #endif
767
swsci_setup(struct drm_i915_private * dev_priv)768 static void swsci_setup(struct drm_i915_private *dev_priv)
769 {
770 struct intel_opregion *opregion = &dev_priv->display.opregion;
771 bool requested_callbacks = false;
772 u32 tmp;
773
774 /* Sub-function code 0 is okay, let's allow them. */
775 opregion->swsci_gbda_sub_functions = 1;
776 opregion->swsci_sbcb_sub_functions = 1;
777
778 /* We use GBDA to ask for supported GBDA calls. */
779 if (swsci(dev_priv, SWSCI_GBDA_SUPPORTED_CALLS, 0, &tmp) == 0) {
780 /* make the bits match the sub-function codes */
781 tmp <<= 1;
782 opregion->swsci_gbda_sub_functions |= tmp;
783 }
784
785 /*
786 * We also use GBDA to ask for _requested_ SBCB callbacks. The driver
787 * must not call interfaces that are not specifically requested by the
788 * bios.
789 */
790 if (swsci(dev_priv, SWSCI_GBDA_REQUESTED_CALLBACKS, 0, &tmp) == 0) {
791 /* here, the bits already match sub-function codes */
792 opregion->swsci_sbcb_sub_functions |= tmp;
793 requested_callbacks = true;
794 }
795
796 /*
797 * But we use SBCB to ask for _supported_ SBCB calls. This does not mean
798 * the callback is _requested_. But we still can't call interfaces that
799 * are not requested.
800 */
801 if (swsci(dev_priv, SWSCI_SBCB_SUPPORTED_CALLBACKS, 0, &tmp) == 0) {
802 /* make the bits match the sub-function codes */
803 u32 low = tmp & 0x7ff;
804 u32 high = tmp & ~0xfff; /* bit 11 is reserved */
805 tmp = (high << 4) | (low << 1) | 1;
806
807 /* best guess what to do with supported wrt requested */
808 if (requested_callbacks) {
809 u32 req = opregion->swsci_sbcb_sub_functions;
810 if ((req & tmp) != req)
811 drm_dbg(&dev_priv->drm,
812 "SWSCI BIOS requested (%08x) SBCB callbacks that are not supported (%08x)\n",
813 req, tmp);
814 /* XXX: for now, trust the requested callbacks */
815 /* opregion->swsci_sbcb_sub_functions &= tmp; */
816 } else {
817 opregion->swsci_sbcb_sub_functions |= tmp;
818 }
819 }
820
821 drm_dbg(&dev_priv->drm,
822 "SWSCI GBDA callbacks %08x, SBCB callbacks %08x\n",
823 opregion->swsci_gbda_sub_functions,
824 opregion->swsci_sbcb_sub_functions);
825 }
826
intel_no_opregion_vbt_callback(const struct dmi_system_id * id)827 static int intel_no_opregion_vbt_callback(const struct dmi_system_id *id)
828 {
829 DRM_DEBUG_KMS("Falling back to manually reading VBT from "
830 "VBIOS ROM for %s\n", id->ident);
831 return 1;
832 }
833
834 static const struct dmi_system_id intel_no_opregion_vbt[] = {
835 {
836 .callback = intel_no_opregion_vbt_callback,
837 .ident = "ThinkCentre A57",
838 .matches = {
839 DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
840 DMI_MATCH(DMI_PRODUCT_NAME, "97027RG"),
841 },
842 },
843 { }
844 };
845
intel_load_vbt_firmware(struct drm_i915_private * dev_priv)846 static int intel_load_vbt_firmware(struct drm_i915_private *dev_priv)
847 {
848 struct intel_opregion *opregion = &dev_priv->display.opregion;
849 const struct firmware *fw = NULL;
850 const char *name = dev_priv->params.vbt_firmware;
851 int ret;
852
853 if (!name || !*name)
854 return -ENOENT;
855
856 #ifdef __linux__
857 ret = request_firmware(&fw, name, dev_priv->drm.dev);
858 #else
859 ret = request_firmware(&fw, name, NULL);
860 #endif
861 if (ret) {
862 drm_err(&dev_priv->drm,
863 "Requesting VBT firmware \"%s\" failed (%d)\n",
864 name, ret);
865 return ret;
866 }
867
868 if (intel_bios_is_valid_vbt(fw->data, fw->size)) {
869 opregion->vbt_firmware = kmemdup(fw->data, fw->size, GFP_KERNEL);
870 if (opregion->vbt_firmware) {
871 drm_dbg_kms(&dev_priv->drm,
872 "Found valid VBT firmware \"%s\"\n", name);
873 opregion->vbt = opregion->vbt_firmware;
874 opregion->vbt_size = fw->size;
875 ret = 0;
876 } else {
877 ret = -ENOMEM;
878 }
879 } else {
880 drm_dbg_kms(&dev_priv->drm, "Invalid VBT firmware \"%s\"\n",
881 name);
882 ret = -EINVAL;
883 }
884
885 release_firmware(fw);
886
887 return ret;
888 }
889
intel_opregion_setup(struct drm_i915_private * dev_priv)890 int intel_opregion_setup(struct drm_i915_private *dev_priv)
891 {
892 struct intel_opregion *opregion = &dev_priv->display.opregion;
893 struct pci_dev *pdev = dev_priv->drm.pdev;
894 u32 asls, mboxes;
895 char buf[sizeof(OPREGION_SIGNATURE)];
896 int err = 0;
897 void *base;
898 const void *vbt;
899 u32 vbt_size;
900
901 BUILD_BUG_ON(sizeof(struct opregion_header) != 0x100);
902 BUILD_BUG_ON(sizeof(struct opregion_acpi) != 0x100);
903 BUILD_BUG_ON(sizeof(struct opregion_swsci) != 0x100);
904 BUILD_BUG_ON(sizeof(struct opregion_asle) != 0x100);
905 BUILD_BUG_ON(sizeof(struct opregion_asle_ext) != 0x400);
906
907 pci_read_config_dword(pdev, ASLS, &asls);
908 drm_dbg(&dev_priv->drm, "graphic opregion physical addr: 0x%x\n",
909 asls);
910 if (asls == 0) {
911 drm_dbg(&dev_priv->drm, "ACPI OpRegion not supported!\n");
912 return -ENOTSUPP;
913 }
914
915 INIT_WORK(&opregion->asle_work, asle_work);
916
917 #ifdef __linux__
918 base = memremap(asls, OPREGION_SIZE, MEMREMAP_WB);
919 if (!base)
920 return -ENOMEM;
921 #else
922 if (bus_space_map(dev_priv->bst, asls, OPREGION_SIZE,
923 BUS_SPACE_MAP_LINEAR, &dev_priv->opregion_ioh))
924 return -ENOMEM;
925 base = bus_space_vaddr(dev_priv->bst, dev_priv->opregion_ioh);
926 #endif
927
928 memcpy(buf, base, sizeof(buf));
929
930 if (memcmp(buf, OPREGION_SIGNATURE, 16)) {
931 drm_dbg(&dev_priv->drm, "opregion signature mismatch\n");
932 err = -EINVAL;
933 goto err_out;
934 }
935 opregion->header = base;
936 opregion->lid_state = base + ACPI_CLID;
937
938 drm_dbg(&dev_priv->drm, "ACPI OpRegion version %u.%u.%u\n",
939 opregion->header->over.major,
940 opregion->header->over.minor,
941 opregion->header->over.revision);
942
943 mboxes = opregion->header->mboxes;
944 if (mboxes & MBOX_ACPI) {
945 drm_dbg(&dev_priv->drm, "Public ACPI methods supported\n");
946 opregion->acpi = base + OPREGION_ACPI_OFFSET;
947 /*
948 * Indicate we handle monitor hotplug events ourselves so we do
949 * not need ACPI notifications for them. Disabling these avoids
950 * triggering the AML code doing the notifation, which may be
951 * broken as Windows also seems to disable these.
952 */
953 opregion->acpi->chpd = 1;
954 }
955
956 if (mboxes & MBOX_SWSCI) {
957 u8 major = opregion->header->over.major;
958
959 if (major >= 3) {
960 drm_err(&dev_priv->drm, "SWSCI Mailbox #2 present for opregion v3.x, ignoring\n");
961 } else {
962 if (major >= 2)
963 drm_dbg(&dev_priv->drm, "SWSCI Mailbox #2 present for opregion v2.x\n");
964 drm_dbg(&dev_priv->drm, "SWSCI supported\n");
965 opregion->swsci = base + OPREGION_SWSCI_OFFSET;
966 swsci_setup(dev_priv);
967 }
968 }
969
970 if (mboxes & MBOX_ASLE) {
971 drm_dbg(&dev_priv->drm, "ASLE supported\n");
972 opregion->asle = base + OPREGION_ASLE_OFFSET;
973
974 opregion->asle->ardy = ASLE_ARDY_NOT_READY;
975 }
976
977 if (mboxes & MBOX_ASLE_EXT) {
978 drm_dbg(&dev_priv->drm, "ASLE extension supported\n");
979 opregion->asle_ext = base + OPREGION_ASLE_EXT_OFFSET;
980 }
981
982 if (mboxes & MBOX_BACKLIGHT) {
983 drm_dbg(&dev_priv->drm, "Mailbox #2 for backlight present\n");
984 }
985
986 if (intel_load_vbt_firmware(dev_priv) == 0)
987 goto out;
988
989 if (dmi_check_system(intel_no_opregion_vbt))
990 goto out;
991
992 if (opregion->header->over.major >= 2 && opregion->asle &&
993 opregion->asle->rvda && opregion->asle->rvds) {
994 resource_size_t rvda = opregion->asle->rvda;
995
996 /*
997 * opregion 2.0: rvda is the physical VBT address.
998 *
999 * opregion 2.1+: rvda is unsigned, relative offset from
1000 * opregion base, and should never point within opregion.
1001 */
1002 if (opregion->header->over.major > 2 ||
1003 opregion->header->over.minor >= 1) {
1004 drm_WARN_ON(&dev_priv->drm, rvda < OPREGION_SIZE);
1005
1006 rvda += asls;
1007 }
1008
1009 #ifdef __linux__
1010 opregion->rvda = memremap(rvda, opregion->asle->rvds,
1011 MEMREMAP_WB);
1012 #else
1013 if (bus_space_map(dev_priv->bst, rvda, opregion->asle->rvds,
1014 BUS_SPACE_MAP_LINEAR, &dev_priv->opregion_rvda_ioh))
1015 return -ENOMEM;
1016 opregion->rvda = bus_space_vaddr(dev_priv->bst,
1017 dev_priv->opregion_rvda_ioh);
1018 dev_priv->opregion_rvda_size = opregion->asle->rvds;
1019 #endif
1020
1021 vbt = opregion->rvda;
1022 vbt_size = opregion->asle->rvds;
1023 if (intel_bios_is_valid_vbt(vbt, vbt_size)) {
1024 drm_dbg_kms(&dev_priv->drm,
1025 "Found valid VBT in ACPI OpRegion (RVDA)\n");
1026 opregion->vbt = vbt;
1027 opregion->vbt_size = vbt_size;
1028 goto out;
1029 } else {
1030 drm_dbg_kms(&dev_priv->drm,
1031 "Invalid VBT in ACPI OpRegion (RVDA)\n");
1032 #ifdef __linux__
1033 memunmap(opregion->rvda);
1034 #else
1035 bus_space_unmap(dev_priv->bst, dev_priv->opregion_rvda_ioh,
1036 dev_priv->opregion_rvda_size);
1037 #endif
1038 opregion->rvda = NULL;
1039 }
1040 }
1041
1042 vbt = base + OPREGION_VBT_OFFSET;
1043 /*
1044 * The VBT specification says that if the ASLE ext mailbox is not used
1045 * its area is reserved, but on some CHT boards the VBT extends into the
1046 * ASLE ext area. Allow this even though it is against the spec, so we
1047 * do not end up rejecting the VBT on those boards (and end up not
1048 * finding the LCD panel because of this).
1049 */
1050 vbt_size = (mboxes & MBOX_ASLE_EXT) ?
1051 OPREGION_ASLE_EXT_OFFSET : OPREGION_SIZE;
1052 vbt_size -= OPREGION_VBT_OFFSET;
1053 if (intel_bios_is_valid_vbt(vbt, vbt_size)) {
1054 drm_dbg_kms(&dev_priv->drm,
1055 "Found valid VBT in ACPI OpRegion (Mailbox #4)\n");
1056 opregion->vbt = vbt;
1057 opregion->vbt_size = vbt_size;
1058 } else {
1059 drm_dbg_kms(&dev_priv->drm,
1060 "Invalid VBT in ACPI OpRegion (Mailbox #4)\n");
1061 }
1062
1063 out:
1064 return 0;
1065
1066 err_out:
1067 #ifdef __linux__
1068 memunmap(base);
1069 #else
1070 bus_space_unmap(dev_priv->bst, dev_priv->opregion_ioh, OPREGION_SIZE);
1071 #endif
1072 return err;
1073 }
1074
intel_use_opregion_panel_type_callback(const struct dmi_system_id * id)1075 static int intel_use_opregion_panel_type_callback(const struct dmi_system_id *id)
1076 {
1077 DRM_INFO("Using panel type from OpRegion on %s\n", id->ident);
1078 return 1;
1079 }
1080
1081 static const struct dmi_system_id intel_use_opregion_panel_type[] = {
1082 {
1083 .callback = intel_use_opregion_panel_type_callback,
1084 .ident = "Conrac GmbH IX45GM2",
1085 .matches = {DMI_MATCH(DMI_SYS_VENDOR, "Conrac GmbH"),
1086 DMI_MATCH(DMI_PRODUCT_NAME, "IX45GM2"),
1087 },
1088 },
1089 { }
1090 };
1091
1092 int
intel_opregion_get_panel_type(struct drm_i915_private * dev_priv)1093 intel_opregion_get_panel_type(struct drm_i915_private *dev_priv)
1094 {
1095 u32 panel_details;
1096 int ret;
1097
1098 ret = swsci(dev_priv, SWSCI_GBDA_PANEL_DETAILS, 0x0, &panel_details);
1099 if (ret)
1100 return ret;
1101
1102 ret = (panel_details >> 8) & 0xff;
1103 if (ret > 0x10) {
1104 drm_dbg_kms(&dev_priv->drm,
1105 "Invalid OpRegion panel type 0x%x\n", ret);
1106 return -EINVAL;
1107 }
1108
1109 /* fall back to VBT panel type? */
1110 if (ret == 0x0) {
1111 drm_dbg_kms(&dev_priv->drm, "No panel type in OpRegion\n");
1112 return -ENODEV;
1113 }
1114
1115 /*
1116 * So far we know that some machined must use it, others must not use it.
1117 * There doesn't seem to be any way to determine which way to go, except
1118 * via a quirk list :(
1119 */
1120 if (!dmi_check_system(intel_use_opregion_panel_type)) {
1121 drm_dbg_kms(&dev_priv->drm,
1122 "Ignoring OpRegion panel type (%d)\n", ret - 1);
1123 return -ENODEV;
1124 }
1125
1126 return ret - 1;
1127 }
1128
1129 /**
1130 * intel_opregion_get_edid - Fetch EDID from ACPI OpRegion mailbox #5
1131 * @intel_connector: eDP connector
1132 *
1133 * This reads the ACPI Opregion mailbox #5 to extract the EDID that is passed
1134 * to it.
1135 *
1136 * Returns:
1137 * The EDID in the OpRegion, or NULL if there is none or it's invalid.
1138 *
1139 */
intel_opregion_get_edid(struct intel_connector * intel_connector)1140 const struct drm_edid *intel_opregion_get_edid(struct intel_connector *intel_connector)
1141 {
1142 struct drm_connector *connector = &intel_connector->base;
1143 struct drm_i915_private *i915 = to_i915(connector->dev);
1144 struct intel_opregion *opregion = &i915->display.opregion;
1145 const struct drm_edid *drm_edid;
1146 const void *edid;
1147 int len;
1148
1149 if (!opregion->asle_ext)
1150 return NULL;
1151
1152 edid = opregion->asle_ext->bddc;
1153
1154 /* Validity corresponds to number of 128-byte blocks */
1155 len = (opregion->asle_ext->phed & ASLE_PHED_EDID_VALID_MASK) * 128;
1156 if (!len || !memchr_inv(edid, 0, len))
1157 return NULL;
1158
1159 drm_edid = drm_edid_alloc(edid, len);
1160
1161 if (!drm_edid_valid(drm_edid)) {
1162 drm_dbg_kms(&i915->drm, "Invalid EDID in ACPI OpRegion (Mailbox #5)\n");
1163 drm_edid_free(drm_edid);
1164 drm_edid = NULL;
1165 }
1166
1167 return drm_edid;
1168 }
1169
intel_opregion_headless_sku(struct drm_i915_private * i915)1170 bool intel_opregion_headless_sku(struct drm_i915_private *i915)
1171 {
1172 struct intel_opregion *opregion = &i915->display.opregion;
1173 struct opregion_header *header = opregion->header;
1174
1175 if (!header || header->over.major < 2 ||
1176 (header->over.major == 2 && header->over.minor < 3))
1177 return false;
1178
1179 return opregion->header->pcon & PCON_HEADLESS_SKU;
1180 }
1181
intel_opregion_register(struct drm_i915_private * i915)1182 void intel_opregion_register(struct drm_i915_private *i915)
1183 {
1184 struct intel_opregion *opregion = &i915->display.opregion;
1185
1186 if (!opregion->header)
1187 return;
1188
1189 if (opregion->acpi) {
1190 #ifdef notyet
1191 opregion->acpi_notifier.notifier_call =
1192 intel_opregion_video_event;
1193 register_acpi_notifier(&opregion->acpi_notifier);
1194 #endif
1195 }
1196
1197 intel_opregion_resume(i915);
1198 }
1199
intel_opregion_resume_display(struct drm_i915_private * i915)1200 static void intel_opregion_resume_display(struct drm_i915_private *i915)
1201 {
1202 struct intel_opregion *opregion = &i915->display.opregion;
1203
1204 if (opregion->acpi) {
1205 #ifdef notyet
1206 intel_didl_outputs(i915);
1207 intel_setup_cadls(i915);
1208 #endif
1209
1210 /*
1211 * Notify BIOS we are ready to handle ACPI video ext notifs.
1212 * Right now, all the events are handled by the ACPI video
1213 * module. We don't actually need to do anything with them.
1214 */
1215 opregion->acpi->csts = 0;
1216 opregion->acpi->drdy = 1;
1217 }
1218
1219 if (opregion->asle) {
1220 opregion->asle->tche = ASLE_TCHE_BLC_EN;
1221 opregion->asle->ardy = ASLE_ARDY_READY;
1222 }
1223
1224 /* Some platforms abuse the _DSM to enable MUX */
1225 intel_dsm_get_bios_data_funcs_supported(i915);
1226 }
1227
intel_opregion_resume(struct drm_i915_private * i915)1228 void intel_opregion_resume(struct drm_i915_private *i915)
1229 {
1230 struct intel_opregion *opregion = &i915->display.opregion;
1231
1232 if (!opregion->header)
1233 return;
1234
1235 if (HAS_DISPLAY(i915))
1236 intel_opregion_resume_display(i915);
1237
1238 intel_opregion_notify_adapter(i915, PCI_D0);
1239 }
1240
intel_opregion_suspend_display(struct drm_i915_private * i915)1241 static void intel_opregion_suspend_display(struct drm_i915_private *i915)
1242 {
1243 struct intel_opregion *opregion = &i915->display.opregion;
1244
1245 if (opregion->asle)
1246 opregion->asle->ardy = ASLE_ARDY_NOT_READY;
1247
1248 cancel_work_sync(&i915->display.opregion.asle_work);
1249
1250 if (opregion->acpi)
1251 opregion->acpi->drdy = 0;
1252 }
1253
intel_opregion_suspend(struct drm_i915_private * i915,pci_power_t state)1254 void intel_opregion_suspend(struct drm_i915_private *i915, pci_power_t state)
1255 {
1256 struct intel_opregion *opregion = &i915->display.opregion;
1257
1258 if (!opregion->header)
1259 return;
1260
1261 intel_opregion_notify_adapter(i915, state);
1262
1263 if (HAS_DISPLAY(i915))
1264 intel_opregion_suspend_display(i915);
1265 }
1266
intel_opregion_unregister(struct drm_i915_private * i915)1267 void intel_opregion_unregister(struct drm_i915_private *i915)
1268 {
1269 struct intel_opregion *opregion = &i915->display.opregion;
1270
1271 intel_opregion_suspend(i915, PCI_D1);
1272
1273 if (!opregion->header)
1274 return;
1275
1276 if (opregion->acpi_notifier.notifier_call) {
1277 unregister_acpi_notifier(&opregion->acpi_notifier);
1278 opregion->acpi_notifier.notifier_call = NULL;
1279 }
1280 }
1281
intel_opregion_cleanup(struct drm_i915_private * i915)1282 void intel_opregion_cleanup(struct drm_i915_private *i915)
1283 {
1284 struct intel_opregion *opregion = &i915->display.opregion;
1285
1286 if (!opregion->header)
1287 return;
1288
1289 /* just clear all opregion memory pointers now */
1290 #ifdef __linux__
1291 memunmap(opregion->header);
1292 if (opregion->rvda) {
1293 memunmap(opregion->rvda);
1294 opregion->rvda = NULL;
1295 }
1296 #else
1297 bus_space_unmap(i915->bst, i915->opregion_ioh, OPREGION_SIZE);
1298 if (opregion->rvda) {
1299 bus_space_unmap(i915->bst, i915->opregion_rvda_ioh,
1300 i915->opregion_rvda_size);
1301 opregion->rvda = NULL;
1302 }
1303 #endif
1304 if (opregion->vbt_firmware) {
1305 kfree(opregion->vbt_firmware);
1306 opregion->vbt_firmware = NULL;
1307 }
1308 opregion->header = NULL;
1309 opregion->acpi = NULL;
1310 opregion->swsci = NULL;
1311 opregion->asle = NULL;
1312 opregion->asle_ext = NULL;
1313 opregion->vbt = NULL;
1314 opregion->lid_state = NULL;
1315 }
1316