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 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
29
30 #include <linux/acpi.h>
31 #include <acpi/video.h>
32
33 #include <drm/drmP.h>
34 #include <drm/i915_drm.h>
35 #include "i915_drv.h"
36 #include "intel_drv.h"
37
38 #define PCI_ASLE 0xe4
39 #define PCI_ASLS 0xfc
40 #define PCI_SWSCI 0xe8
41 #define PCI_SWSCI_SCISEL (1 << 15)
42 #define PCI_SWSCI_GSSCIE (1 << 0)
43
44 #define OPREGION_HEADER_OFFSET 0
45 #define OPREGION_ACPI_OFFSET 0x100
46 #define ACPI_CLID 0x01ac /* current lid state indicator */
47 #define ACPI_CDCK 0x01b0 /* current docking state indicator */
48 #define OPREGION_SWSCI_OFFSET 0x200
49 #define OPREGION_ASLE_OFFSET 0x300
50 #define OPREGION_VBT_OFFSET 0x400
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
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 u8 reserved[164];
66 } __packed;
67
68 /* OpRegion mailbox #1: public ACPI methods */
69 struct opregion_acpi {
70 u32 drdy; /* driver readiness */
71 u32 csts; /* notification status */
72 u32 cevt; /* current event */
73 u8 rsvd1[20];
74 u32 didl[8]; /* supported display devices ID list */
75 u32 cpdl[8]; /* currently presented display list */
76 u32 cadl[8]; /* currently active display list */
77 u32 nadl[8]; /* next active devices list */
78 u32 aslp; /* ASL sleep time-out */
79 u32 tidx; /* toggle table index */
80 u32 chpd; /* current hotplug enable indicator */
81 u32 clid; /* current lid state*/
82 u32 cdck; /* current docking state */
83 u32 sxsw; /* Sx state resume */
84 u32 evts; /* ASL supported events */
85 u32 cnot; /* current OS notification */
86 u32 nrdy; /* driver status */
87 u8 rsvd2[60];
88 } __packed;
89
90 /* OpRegion mailbox #2: SWSCI */
91 struct opregion_swsci {
92 u32 scic; /* SWSCI command|status|data */
93 u32 parm; /* command parameters */
94 u32 dslp; /* driver sleep time-out */
95 u8 rsvd[244];
96 } __packed;
97
98 /* OpRegion mailbox #3: ASLE */
99 struct opregion_asle {
100 u32 ardy; /* driver readiness */
101 u32 aslc; /* ASLE interrupt command */
102 u32 tche; /* technology enabled indicator */
103 u32 alsi; /* current ALS illuminance reading */
104 u32 bclp; /* backlight brightness to set */
105 u32 pfit; /* panel fitting state */
106 u32 cblv; /* current brightness level */
107 u16 bclm[20]; /* backlight level duty cycle mapping table */
108 u32 cpfm; /* current panel fitting mode */
109 u32 epfm; /* enabled panel fitting modes */
110 u8 plut[74]; /* panel LUT and identifier */
111 u32 pfmb; /* PWM freq and min brightness */
112 u32 cddv; /* color correction default values */
113 u32 pcft; /* power conservation features */
114 u32 srot; /* supported rotation angles */
115 u32 iuer; /* IUER events */
116 u8 rsvd[86];
117 } __packed;
118
119 /* Driver readiness indicator */
120 #define ASLE_ARDY_READY (1 << 0)
121 #define ASLE_ARDY_NOT_READY (0 << 0)
122
123 /* ASLE Interrupt Command (ASLC) bits */
124 #define ASLC_SET_ALS_ILLUM (1 << 0)
125 #define ASLC_SET_BACKLIGHT (1 << 1)
126 #define ASLC_SET_PFIT (1 << 2)
127 #define ASLC_SET_PWM_FREQ (1 << 3)
128 #define ASLC_SUPPORTED_ROTATION_ANGLES (1 << 4)
129 #define ASLC_BUTTON_ARRAY (1 << 5)
130 #define ASLC_CONVERTIBLE_INDICATOR (1 << 6)
131 #define ASLC_DOCKING_INDICATOR (1 << 7)
132 #define ASLC_ISCT_STATE_CHANGE (1 << 8)
133 #define ASLC_REQ_MSK 0x1ff
134 /* response bits */
135 #define ASLC_ALS_ILLUM_FAILED (1 << 10)
136 #define ASLC_BACKLIGHT_FAILED (1 << 12)
137 #define ASLC_PFIT_FAILED (1 << 14)
138 #define ASLC_PWM_FREQ_FAILED (1 << 16)
139 #define ASLC_ROTATION_ANGLES_FAILED (1 << 18)
140 #define ASLC_BUTTON_ARRAY_FAILED (1 << 20)
141 #define ASLC_CONVERTIBLE_FAILED (1 << 22)
142 #define ASLC_DOCKING_FAILED (1 << 24)
143 #define ASLC_ISCT_STATE_FAILED (1 << 26)
144
145 /* Technology enabled indicator */
146 #define ASLE_TCHE_ALS_EN (1 << 0)
147 #define ASLE_TCHE_BLC_EN (1 << 1)
148 #define ASLE_TCHE_PFIT_EN (1 << 2)
149 #define ASLE_TCHE_PFMB_EN (1 << 3)
150
151 /* ASLE backlight brightness to set */
152 #define ASLE_BCLP_VALID (1<<31)
153 #define ASLE_BCLP_MSK (~(1<<31))
154
155 /* ASLE panel fitting request */
156 #define ASLE_PFIT_VALID (1<<31)
157 #define ASLE_PFIT_CENTER (1<<0)
158 #define ASLE_PFIT_STRETCH_TEXT (1<<1)
159 #define ASLE_PFIT_STRETCH_GFX (1<<2)
160
161 /* PWM frequency and minimum brightness */
162 #define ASLE_PFMB_BRIGHTNESS_MASK (0xff)
163 #define ASLE_PFMB_BRIGHTNESS_VALID (1<<8)
164 #define ASLE_PFMB_PWM_MASK (0x7ffffe00)
165 #define ASLE_PFMB_PWM_VALID (1<<31)
166
167 #define ASLE_CBLV_VALID (1<<31)
168
169 /* IUER */
170 #define ASLE_IUER_DOCKING (1 << 7)
171 #define ASLE_IUER_CONVERTIBLE (1 << 6)
172 #define ASLE_IUER_ROTATION_LOCK_BTN (1 << 4)
173 #define ASLE_IUER_VOLUME_DOWN_BTN (1 << 3)
174 #define ASLE_IUER_VOLUME_UP_BTN (1 << 2)
175 #define ASLE_IUER_WINDOWS_BTN (1 << 1)
176 #define ASLE_IUER_POWER_BTN (1 << 0)
177
178 /* Software System Control Interrupt (SWSCI) */
179 #define SWSCI_SCIC_INDICATOR (1 << 0)
180 #define SWSCI_SCIC_MAIN_FUNCTION_SHIFT 1
181 #define SWSCI_SCIC_MAIN_FUNCTION_MASK (0xf << 1)
182 #define SWSCI_SCIC_SUB_FUNCTION_SHIFT 8
183 #define SWSCI_SCIC_SUB_FUNCTION_MASK (0xff << 8)
184 #define SWSCI_SCIC_EXIT_PARAMETER_SHIFT 8
185 #define SWSCI_SCIC_EXIT_PARAMETER_MASK (0xff << 8)
186 #define SWSCI_SCIC_EXIT_STATUS_SHIFT 5
187 #define SWSCI_SCIC_EXIT_STATUS_MASK (7 << 5)
188 #define SWSCI_SCIC_EXIT_STATUS_SUCCESS 1
189
190 #define SWSCI_FUNCTION_CODE(main, sub) \
191 ((main) << SWSCI_SCIC_MAIN_FUNCTION_SHIFT | \
192 (sub) << SWSCI_SCIC_SUB_FUNCTION_SHIFT)
193
194 /* SWSCI: Get BIOS Data (GBDA) */
195 #define SWSCI_GBDA 4
196 #define SWSCI_GBDA_SUPPORTED_CALLS SWSCI_FUNCTION_CODE(SWSCI_GBDA, 0)
197 #define SWSCI_GBDA_REQUESTED_CALLBACKS SWSCI_FUNCTION_CODE(SWSCI_GBDA, 1)
198 #define SWSCI_GBDA_BOOT_DISPLAY_PREF SWSCI_FUNCTION_CODE(SWSCI_GBDA, 4)
199 #define SWSCI_GBDA_PANEL_DETAILS SWSCI_FUNCTION_CODE(SWSCI_GBDA, 5)
200 #define SWSCI_GBDA_TV_STANDARD SWSCI_FUNCTION_CODE(SWSCI_GBDA, 6)
201 #define SWSCI_GBDA_INTERNAL_GRAPHICS SWSCI_FUNCTION_CODE(SWSCI_GBDA, 7)
202 #define SWSCI_GBDA_SPREAD_SPECTRUM SWSCI_FUNCTION_CODE(SWSCI_GBDA, 10)
203
204 /* SWSCI: System BIOS Callbacks (SBCB) */
205 #define SWSCI_SBCB 6
206 #define SWSCI_SBCB_SUPPORTED_CALLBACKS SWSCI_FUNCTION_CODE(SWSCI_SBCB, 0)
207 #define SWSCI_SBCB_INIT_COMPLETION SWSCI_FUNCTION_CODE(SWSCI_SBCB, 1)
208 #define SWSCI_SBCB_PRE_HIRES_SET_MODE SWSCI_FUNCTION_CODE(SWSCI_SBCB, 3)
209 #define SWSCI_SBCB_POST_HIRES_SET_MODE SWSCI_FUNCTION_CODE(SWSCI_SBCB, 4)
210 #define SWSCI_SBCB_DISPLAY_SWITCH SWSCI_FUNCTION_CODE(SWSCI_SBCB, 5)
211 #define SWSCI_SBCB_SET_TV_FORMAT SWSCI_FUNCTION_CODE(SWSCI_SBCB, 6)
212 #define SWSCI_SBCB_ADAPTER_POWER_STATE SWSCI_FUNCTION_CODE(SWSCI_SBCB, 7)
213 #define SWSCI_SBCB_DISPLAY_POWER_STATE SWSCI_FUNCTION_CODE(SWSCI_SBCB, 8)
214 #define SWSCI_SBCB_SET_BOOT_DISPLAY SWSCI_FUNCTION_CODE(SWSCI_SBCB, 9)
215 #define SWSCI_SBCB_SET_PANEL_DETAILS SWSCI_FUNCTION_CODE(SWSCI_SBCB, 10)
216 #define SWSCI_SBCB_SET_INTERNAL_GFX SWSCI_FUNCTION_CODE(SWSCI_SBCB, 11)
217 #define SWSCI_SBCB_POST_HIRES_TO_DOS_FS SWSCI_FUNCTION_CODE(SWSCI_SBCB, 16)
218 #define SWSCI_SBCB_SUSPEND_RESUME SWSCI_FUNCTION_CODE(SWSCI_SBCB, 17)
219 #define SWSCI_SBCB_SET_SPREAD_SPECTRUM SWSCI_FUNCTION_CODE(SWSCI_SBCB, 18)
220 #define SWSCI_SBCB_POST_VBE_PM SWSCI_FUNCTION_CODE(SWSCI_SBCB, 19)
221 #define SWSCI_SBCB_ENABLE_DISABLE_AUDIO SWSCI_FUNCTION_CODE(SWSCI_SBCB, 21)
222
223 #define ACPI_OTHER_OUTPUT (0<<8)
224 #define ACPI_VGA_OUTPUT (1<<8)
225 #define ACPI_TV_OUTPUT (2<<8)
226 #define ACPI_DIGITAL_OUTPUT (3<<8)
227 #define ACPI_LVDS_OUTPUT (4<<8)
228
229 #define MAX_DSLP 1500
230
231 #ifdef CONFIG_ACPI
swsci(struct drm_device * dev,u32 function,u32 parm,u32 * parm_out)232 static int swsci(struct drm_device *dev, u32 function, u32 parm, u32 *parm_out)
233 {
234 struct drm_i915_private *dev_priv = dev->dev_private;
235 struct opregion_swsci __iomem *swsci = dev_priv->opregion.swsci;
236 u32 main_function, sub_function, scic;
237 u16 pci_swsci;
238 u32 dslp;
239
240 if (!swsci)
241 return -ENODEV;
242
243 main_function = (function & SWSCI_SCIC_MAIN_FUNCTION_MASK) >>
244 SWSCI_SCIC_MAIN_FUNCTION_SHIFT;
245 sub_function = (function & SWSCI_SCIC_SUB_FUNCTION_MASK) >>
246 SWSCI_SCIC_SUB_FUNCTION_SHIFT;
247
248 /* Check if we can call the function. See swsci_setup for details. */
249 if (main_function == SWSCI_SBCB) {
250 if ((dev_priv->opregion.swsci_sbcb_sub_functions &
251 (1 << sub_function)) == 0)
252 return -EINVAL;
253 } else if (main_function == SWSCI_GBDA) {
254 if ((dev_priv->opregion.swsci_gbda_sub_functions &
255 (1 << sub_function)) == 0)
256 return -EINVAL;
257 }
258
259 /* Driver sleep timeout in ms. */
260 dslp = ioread32(&swsci->dslp);
261 if (!dslp) {
262 /* The spec says 2ms should be the default, but it's too small
263 * for some machines. */
264 dslp = 50;
265 } else if (dslp > MAX_DSLP) {
266 /* Hey bios, trust must be earned. */
267 DRM_INFO_ONCE("ACPI BIOS requests an excessive sleep of %u ms, "
268 "using %u ms instead\n", dslp, MAX_DSLP);
269 dslp = MAX_DSLP;
270 }
271
272 /* The spec tells us to do this, but we are the only user... */
273 scic = ioread32(&swsci->scic);
274 if (scic & SWSCI_SCIC_INDICATOR) {
275 DRM_DEBUG_DRIVER("SWSCI request already in progress\n");
276 return -EBUSY;
277 }
278
279 scic = function | SWSCI_SCIC_INDICATOR;
280
281 iowrite32(parm, &swsci->parm);
282 iowrite32(scic, &swsci->scic);
283
284 /* Ensure SCI event is selected and event trigger is cleared. */
285 pci_read_config_word(dev->pdev, PCI_SWSCI, &pci_swsci);
286 if (!(pci_swsci & PCI_SWSCI_SCISEL) || (pci_swsci & PCI_SWSCI_GSSCIE)) {
287 pci_swsci |= PCI_SWSCI_SCISEL;
288 pci_swsci &= ~PCI_SWSCI_GSSCIE;
289 pci_write_config_word(dev->pdev, PCI_SWSCI, pci_swsci);
290 }
291
292 /* Use event trigger to tell bios to check the mail. */
293 pci_swsci |= PCI_SWSCI_GSSCIE;
294 pci_write_config_word(dev->pdev, PCI_SWSCI, pci_swsci);
295
296 /* Poll for the result. */
297 #define C (((scic = ioread32(&swsci->scic)) & SWSCI_SCIC_INDICATOR) == 0)
298 if (wait_for(C, dslp)) {
299 DRM_DEBUG_DRIVER("SWSCI request timed out\n");
300 return -ETIMEDOUT;
301 }
302
303 scic = (scic & SWSCI_SCIC_EXIT_STATUS_MASK) >>
304 SWSCI_SCIC_EXIT_STATUS_SHIFT;
305
306 /* Note: scic == 0 is an error! */
307 if (scic != SWSCI_SCIC_EXIT_STATUS_SUCCESS) {
308 DRM_DEBUG_DRIVER("SWSCI request error %u\n", scic);
309 return -EIO;
310 }
311
312 if (parm_out)
313 *parm_out = ioread32(&swsci->parm);
314
315 return 0;
316
317 #undef C
318 }
319
320 #define DISPLAY_TYPE_CRT 0
321 #define DISPLAY_TYPE_TV 1
322 #define DISPLAY_TYPE_EXTERNAL_FLAT_PANEL 2
323 #define DISPLAY_TYPE_INTERNAL_FLAT_PANEL 3
324
intel_opregion_notify_encoder(struct intel_encoder * intel_encoder,bool enable)325 int intel_opregion_notify_encoder(struct intel_encoder *intel_encoder,
326 bool enable)
327 {
328 struct drm_device *dev = intel_encoder->base.dev;
329 u32 parm = 0;
330 u32 type = 0;
331 u32 port;
332
333 /* don't care about old stuff for now */
334 if (!HAS_DDI(dev))
335 return 0;
336
337 port = intel_ddi_get_encoder_port(intel_encoder);
338 if (port == PORT_E) {
339 port = 0;
340 } else {
341 parm |= 1 << port;
342 port++;
343 }
344
345 if (!enable)
346 parm |= 4 << 8;
347
348 switch (intel_encoder->type) {
349 case INTEL_OUTPUT_ANALOG:
350 type = DISPLAY_TYPE_CRT;
351 break;
352 case INTEL_OUTPUT_UNKNOWN:
353 case INTEL_OUTPUT_DISPLAYPORT:
354 case INTEL_OUTPUT_HDMI:
355 case INTEL_OUTPUT_DP_MST:
356 type = DISPLAY_TYPE_EXTERNAL_FLAT_PANEL;
357 break;
358 case INTEL_OUTPUT_EDP:
359 type = DISPLAY_TYPE_INTERNAL_FLAT_PANEL;
360 break;
361 default:
362 WARN_ONCE(1, "unsupported intel_encoder type %d\n",
363 intel_encoder->type);
364 return -EINVAL;
365 }
366
367 parm |= type << (16 + port * 3);
368
369 return swsci(dev, SWSCI_SBCB_DISPLAY_POWER_STATE, parm, NULL);
370 }
371
372 static const struct {
373 pci_power_t pci_power_state;
374 u32 parm;
375 } power_state_map[] = {
376 { PCI_D0, 0x00 },
377 { PCI_D1, 0x01 },
378 { PCI_D2, 0x02 },
379 { PCI_D3hot, 0x04 },
380 { PCI_D3cold, 0x04 },
381 };
382
intel_opregion_notify_adapter(struct drm_device * dev,pci_power_t state)383 int intel_opregion_notify_adapter(struct drm_device *dev, pci_power_t state)
384 {
385 int i;
386
387 if (!HAS_DDI(dev))
388 return 0;
389
390 for (i = 0; i < ARRAY_SIZE(power_state_map); i++) {
391 if (state == power_state_map[i].pci_power_state)
392 return swsci(dev, SWSCI_SBCB_ADAPTER_POWER_STATE,
393 power_state_map[i].parm, NULL);
394 }
395
396 return -EINVAL;
397 }
398
399 /*
400 * If the vendor backlight interface is not in use and ACPI backlight interface
401 * is broken, do not bother processing backlight change requests from firmware.
402 */
should_ignore_backlight_request(void)403 static bool should_ignore_backlight_request(void)
404 {
405 return acpi_video_backlight_support() &&
406 !acpi_video_verify_backlight_support();
407 }
408
asle_set_backlight(struct drm_device * dev,u32 bclp)409 static u32 asle_set_backlight(struct drm_device *dev, u32 bclp)
410 {
411 struct drm_i915_private *dev_priv = dev->dev_private;
412 struct intel_connector *intel_connector;
413 struct opregion_asle __iomem *asle = dev_priv->opregion.asle;
414
415 DRM_DEBUG_DRIVER("bclp = 0x%08x\n", bclp);
416
417 if (should_ignore_backlight_request()) {
418 DRM_DEBUG_KMS("opregion backlight request ignored\n");
419 return 0;
420 }
421
422 if (!(bclp & ASLE_BCLP_VALID))
423 return ASLC_BACKLIGHT_FAILED;
424
425 bclp &= ASLE_BCLP_MSK;
426 if (bclp > 255)
427 return ASLC_BACKLIGHT_FAILED;
428
429 drm_modeset_lock(&dev->mode_config.connection_mutex, NULL);
430
431 /*
432 * Update backlight on all connectors that support backlight (usually
433 * only one).
434 */
435 DRM_DEBUG_KMS("updating opregion backlight %d/255\n", bclp);
436 list_for_each_entry(intel_connector, &dev->mode_config.connector_list, base.head)
437 intel_panel_set_backlight_acpi(intel_connector, bclp, 255);
438 iowrite32(DIV_ROUND_UP(bclp * 100, 255) | ASLE_CBLV_VALID, &asle->cblv);
439
440 drm_modeset_unlock(&dev->mode_config.connection_mutex);
441
442
443 return 0;
444 }
445
asle_set_als_illum(struct drm_device * dev,u32 alsi)446 static u32 asle_set_als_illum(struct drm_device *dev, u32 alsi)
447 {
448 /* alsi is the current ALS reading in lux. 0 indicates below sensor
449 range, 0xffff indicates above sensor range. 1-0xfffe are valid */
450 DRM_DEBUG_DRIVER("Illum is not supported\n");
451 return ASLC_ALS_ILLUM_FAILED;
452 }
453
asle_set_pwm_freq(struct drm_device * dev,u32 pfmb)454 static u32 asle_set_pwm_freq(struct drm_device *dev, u32 pfmb)
455 {
456 DRM_DEBUG_DRIVER("PWM freq is not supported\n");
457 return ASLC_PWM_FREQ_FAILED;
458 }
459
asle_set_pfit(struct drm_device * dev,u32 pfit)460 static u32 asle_set_pfit(struct drm_device *dev, u32 pfit)
461 {
462 /* Panel fitting is currently controlled by the X code, so this is a
463 noop until modesetting support works fully */
464 DRM_DEBUG_DRIVER("Pfit is not supported\n");
465 return ASLC_PFIT_FAILED;
466 }
467
asle_set_supported_rotation_angles(struct drm_device * dev,u32 srot)468 static u32 asle_set_supported_rotation_angles(struct drm_device *dev, u32 srot)
469 {
470 DRM_DEBUG_DRIVER("SROT is not supported\n");
471 return ASLC_ROTATION_ANGLES_FAILED;
472 }
473
asle_set_button_array(struct drm_device * dev,u32 iuer)474 static u32 asle_set_button_array(struct drm_device *dev, u32 iuer)
475 {
476 if (!iuer)
477 DRM_DEBUG_DRIVER("Button array event is not supported (nothing)\n");
478 if (iuer & ASLE_IUER_ROTATION_LOCK_BTN)
479 DRM_DEBUG_DRIVER("Button array event is not supported (rotation lock)\n");
480 if (iuer & ASLE_IUER_VOLUME_DOWN_BTN)
481 DRM_DEBUG_DRIVER("Button array event is not supported (volume down)\n");
482 if (iuer & ASLE_IUER_VOLUME_UP_BTN)
483 DRM_DEBUG_DRIVER("Button array event is not supported (volume up)\n");
484 if (iuer & ASLE_IUER_WINDOWS_BTN)
485 DRM_DEBUG_DRIVER("Button array event is not supported (windows)\n");
486 if (iuer & ASLE_IUER_POWER_BTN)
487 DRM_DEBUG_DRIVER("Button array event is not supported (power)\n");
488
489 return ASLC_BUTTON_ARRAY_FAILED;
490 }
491
asle_set_convertible(struct drm_device * dev,u32 iuer)492 static u32 asle_set_convertible(struct drm_device *dev, u32 iuer)
493 {
494 if (iuer & ASLE_IUER_CONVERTIBLE)
495 DRM_DEBUG_DRIVER("Convertible is not supported (clamshell)\n");
496 else
497 DRM_DEBUG_DRIVER("Convertible is not supported (slate)\n");
498
499 return ASLC_CONVERTIBLE_FAILED;
500 }
501
asle_set_docking(struct drm_device * dev,u32 iuer)502 static u32 asle_set_docking(struct drm_device *dev, u32 iuer)
503 {
504 if (iuer & ASLE_IUER_DOCKING)
505 DRM_DEBUG_DRIVER("Docking is not supported (docked)\n");
506 else
507 DRM_DEBUG_DRIVER("Docking is not supported (undocked)\n");
508
509 return ASLC_DOCKING_FAILED;
510 }
511
asle_isct_state(struct drm_device * dev)512 static u32 asle_isct_state(struct drm_device *dev)
513 {
514 DRM_DEBUG_DRIVER("ISCT is not supported\n");
515 return ASLC_ISCT_STATE_FAILED;
516 }
517
asle_work(struct work_struct * work)518 static void asle_work(struct work_struct *work)
519 {
520 struct intel_opregion *opregion =
521 container_of(work, struct intel_opregion, asle_work);
522 struct drm_i915_private *dev_priv =
523 container_of(opregion, struct drm_i915_private, opregion);
524 struct drm_device *dev = dev_priv->dev;
525 struct opregion_asle __iomem *asle = dev_priv->opregion.asle;
526 u32 aslc_stat = 0;
527 u32 aslc_req;
528
529 if (!asle)
530 return;
531
532 aslc_req = ioread32(&asle->aslc);
533
534 if (!(aslc_req & ASLC_REQ_MSK)) {
535 DRM_DEBUG_DRIVER("No request on ASLC interrupt 0x%08x\n",
536 aslc_req);
537 return;
538 }
539
540 if (aslc_req & ASLC_SET_ALS_ILLUM)
541 aslc_stat |= asle_set_als_illum(dev, ioread32(&asle->alsi));
542
543 if (aslc_req & ASLC_SET_BACKLIGHT)
544 aslc_stat |= asle_set_backlight(dev, ioread32(&asle->bclp));
545
546 if (aslc_req & ASLC_SET_PFIT)
547 aslc_stat |= asle_set_pfit(dev, ioread32(&asle->pfit));
548
549 if (aslc_req & ASLC_SET_PWM_FREQ)
550 aslc_stat |= asle_set_pwm_freq(dev, ioread32(&asle->pfmb));
551
552 if (aslc_req & ASLC_SUPPORTED_ROTATION_ANGLES)
553 aslc_stat |= asle_set_supported_rotation_angles(dev,
554 ioread32(&asle->srot));
555
556 if (aslc_req & ASLC_BUTTON_ARRAY)
557 aslc_stat |= asle_set_button_array(dev, ioread32(&asle->iuer));
558
559 if (aslc_req & ASLC_CONVERTIBLE_INDICATOR)
560 aslc_stat |= asle_set_convertible(dev, ioread32(&asle->iuer));
561
562 if (aslc_req & ASLC_DOCKING_INDICATOR)
563 aslc_stat |= asle_set_docking(dev, ioread32(&asle->iuer));
564
565 if (aslc_req & ASLC_ISCT_STATE_CHANGE)
566 aslc_stat |= asle_isct_state(dev);
567
568 iowrite32(aslc_stat, &asle->aslc);
569 }
570
intel_opregion_asle_intr(struct drm_device * dev)571 void intel_opregion_asle_intr(struct drm_device *dev)
572 {
573 struct drm_i915_private *dev_priv = dev->dev_private;
574
575 if (dev_priv->opregion.asle)
576 schedule_work(&dev_priv->opregion.asle_work);
577 }
578
579 #define ACPI_EV_DISPLAY_SWITCH (1<<0)
580 #define ACPI_EV_LID (1<<1)
581 #define ACPI_EV_DOCK (1<<2)
582
583 static struct intel_opregion *system_opregion;
584
intel_opregion_video_event(struct notifier_block * nb,unsigned long val,void * data)585 static int intel_opregion_video_event(struct notifier_block *nb,
586 unsigned long val, void *data)
587 {
588 /* The only video events relevant to opregion are 0x80. These indicate
589 either a docking event, lid switch or display switch request. In
590 Linux, these are handled by the dock, button and video drivers.
591 */
592
593 struct opregion_acpi __iomem *acpi;
594 struct acpi_bus_event *event = data;
595 int ret = NOTIFY_OK;
596
597 if (strcmp(event->device_class, ACPI_VIDEO_CLASS) != 0)
598 return NOTIFY_DONE;
599
600 if (!system_opregion)
601 return NOTIFY_DONE;
602
603 acpi = system_opregion->acpi;
604
605 if (event->type == 0x80 &&
606 (ioread32(&acpi->cevt) & 1) == 0)
607 ret = NOTIFY_BAD;
608
609 iowrite32(0, &acpi->csts);
610
611 return ret;
612 }
613
614 static struct notifier_block intel_opregion_notifier = {
615 .notifier_call = intel_opregion_video_event,
616 };
617
618 /*
619 * Initialise the DIDL field in opregion. This passes a list of devices to
620 * the firmware. Values are defined by section B.4.2 of the ACPI specification
621 * (version 3)
622 */
623
intel_didl_outputs(struct drm_device * dev)624 static void intel_didl_outputs(struct drm_device *dev)
625 {
626 struct drm_i915_private *dev_priv = dev->dev_private;
627 struct intel_opregion *opregion = &dev_priv->opregion;
628 struct drm_connector *connector;
629 acpi_handle handle;
630 struct acpi_device *acpi_dev, *acpi_cdev, *acpi_video_bus = NULL;
631 unsigned long long device_id;
632 acpi_status status;
633 u32 temp;
634 int i = 0;
635
636 handle = ACPI_HANDLE(&dev->pdev->dev);
637 if (!handle || acpi_bus_get_device(handle, &acpi_dev))
638 return;
639
640 if (acpi_is_video_device(handle))
641 acpi_video_bus = acpi_dev;
642 else {
643 list_for_each_entry(acpi_cdev, &acpi_dev->children, node) {
644 if (acpi_is_video_device(acpi_cdev->handle)) {
645 acpi_video_bus = acpi_cdev;
646 break;
647 }
648 }
649 }
650
651 if (!acpi_video_bus) {
652 pr_warn("No ACPI video bus found\n");
653 return;
654 }
655
656 list_for_each_entry(acpi_cdev, &acpi_video_bus->children, node) {
657 if (i >= 8) {
658 dev_dbg(&dev->pdev->dev,
659 "More than 8 outputs detected via ACPI\n");
660 return;
661 }
662 status =
663 acpi_evaluate_integer(acpi_cdev->handle, "_ADR",
664 NULL, &device_id);
665 if (ACPI_SUCCESS(status)) {
666 if (!device_id)
667 goto blind_set;
668 iowrite32((u32)(device_id & 0x0f0f),
669 &opregion->acpi->didl[i]);
670 i++;
671 }
672 }
673
674 end:
675 /* If fewer than 8 outputs, the list must be null terminated */
676 if (i < 8)
677 iowrite32(0, &opregion->acpi->didl[i]);
678 return;
679
680 blind_set:
681 i = 0;
682 list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
683 int output_type = ACPI_OTHER_OUTPUT;
684 if (i >= 8) {
685 dev_dbg(&dev->pdev->dev,
686 "More than 8 outputs in connector list\n");
687 return;
688 }
689 switch (connector->connector_type) {
690 case DRM_MODE_CONNECTOR_VGA:
691 case DRM_MODE_CONNECTOR_DVIA:
692 output_type = ACPI_VGA_OUTPUT;
693 break;
694 case DRM_MODE_CONNECTOR_Composite:
695 case DRM_MODE_CONNECTOR_SVIDEO:
696 case DRM_MODE_CONNECTOR_Component:
697 case DRM_MODE_CONNECTOR_9PinDIN:
698 output_type = ACPI_TV_OUTPUT;
699 break;
700 case DRM_MODE_CONNECTOR_DVII:
701 case DRM_MODE_CONNECTOR_DVID:
702 case DRM_MODE_CONNECTOR_DisplayPort:
703 case DRM_MODE_CONNECTOR_HDMIA:
704 case DRM_MODE_CONNECTOR_HDMIB:
705 output_type = ACPI_DIGITAL_OUTPUT;
706 break;
707 case DRM_MODE_CONNECTOR_LVDS:
708 output_type = ACPI_LVDS_OUTPUT;
709 break;
710 }
711 temp = ioread32(&opregion->acpi->didl[i]);
712 iowrite32(temp | (1<<31) | output_type | i,
713 &opregion->acpi->didl[i]);
714 i++;
715 }
716 goto end;
717 }
718
intel_setup_cadls(struct drm_device * dev)719 static void intel_setup_cadls(struct drm_device *dev)
720 {
721 struct drm_i915_private *dev_priv = dev->dev_private;
722 struct intel_opregion *opregion = &dev_priv->opregion;
723 int i = 0;
724 u32 disp_id;
725
726 /* Initialize the CADL field by duplicating the DIDL values.
727 * Technically, this is not always correct as display outputs may exist,
728 * but not active. This initialization is necessary for some Clevo
729 * laptops that check this field before processing the brightness and
730 * display switching hotkeys. Just like DIDL, CADL is NULL-terminated if
731 * there are less than eight devices. */
732 do {
733 disp_id = ioread32(&opregion->acpi->didl[i]);
734 iowrite32(disp_id, &opregion->acpi->cadl[i]);
735 } while (++i < 8 && disp_id != 0);
736 }
737
intel_opregion_init(struct drm_device * dev)738 void intel_opregion_init(struct drm_device *dev)
739 {
740 struct drm_i915_private *dev_priv = dev->dev_private;
741 struct intel_opregion *opregion = &dev_priv->opregion;
742
743 if (!opregion->header)
744 return;
745
746 if (opregion->acpi) {
747 if (drm_core_check_feature(dev, DRIVER_MODESET)) {
748 intel_didl_outputs(dev);
749 intel_setup_cadls(dev);
750 }
751
752 /* Notify BIOS we are ready to handle ACPI video ext notifs.
753 * Right now, all the events are handled by the ACPI video module.
754 * We don't actually need to do anything with them. */
755 iowrite32(0, &opregion->acpi->csts);
756 iowrite32(1, &opregion->acpi->drdy);
757
758 system_opregion = opregion;
759 register_acpi_notifier(&intel_opregion_notifier);
760 }
761
762 if (opregion->asle) {
763 iowrite32(ASLE_TCHE_BLC_EN, &opregion->asle->tche);
764 iowrite32(ASLE_ARDY_READY, &opregion->asle->ardy);
765 }
766 }
767
intel_opregion_fini(struct drm_device * dev)768 void intel_opregion_fini(struct drm_device *dev)
769 {
770 struct drm_i915_private *dev_priv = dev->dev_private;
771 struct intel_opregion *opregion = &dev_priv->opregion;
772
773 if (!opregion->header)
774 return;
775
776 if (opregion->asle)
777 iowrite32(ASLE_ARDY_NOT_READY, &opregion->asle->ardy);
778
779 cancel_work_sync(&dev_priv->opregion.asle_work);
780
781 if (opregion->acpi) {
782 iowrite32(0, &opregion->acpi->drdy);
783
784 system_opregion = NULL;
785 unregister_acpi_notifier(&intel_opregion_notifier);
786 }
787
788 /* just clear all opregion memory pointers now */
789 iounmap(opregion->header);
790 opregion->header = NULL;
791 opregion->acpi = NULL;
792 opregion->swsci = NULL;
793 opregion->asle = NULL;
794 opregion->vbt = NULL;
795 opregion->lid_state = NULL;
796 }
797
swsci_setup(struct drm_device * dev)798 static void swsci_setup(struct drm_device *dev)
799 {
800 struct drm_i915_private *dev_priv = dev->dev_private;
801 struct intel_opregion *opregion = &dev_priv->opregion;
802 bool requested_callbacks = false;
803 u32 tmp;
804
805 /* Sub-function code 0 is okay, let's allow them. */
806 opregion->swsci_gbda_sub_functions = 1;
807 opregion->swsci_sbcb_sub_functions = 1;
808
809 /* We use GBDA to ask for supported GBDA calls. */
810 if (swsci(dev, SWSCI_GBDA_SUPPORTED_CALLS, 0, &tmp) == 0) {
811 /* make the bits match the sub-function codes */
812 tmp <<= 1;
813 opregion->swsci_gbda_sub_functions |= tmp;
814 }
815
816 /*
817 * We also use GBDA to ask for _requested_ SBCB callbacks. The driver
818 * must not call interfaces that are not specifically requested by the
819 * bios.
820 */
821 if (swsci(dev, SWSCI_GBDA_REQUESTED_CALLBACKS, 0, &tmp) == 0) {
822 /* here, the bits already match sub-function codes */
823 opregion->swsci_sbcb_sub_functions |= tmp;
824 requested_callbacks = true;
825 }
826
827 /*
828 * But we use SBCB to ask for _supported_ SBCB calls. This does not mean
829 * the callback is _requested_. But we still can't call interfaces that
830 * are not requested.
831 */
832 if (swsci(dev, SWSCI_SBCB_SUPPORTED_CALLBACKS, 0, &tmp) == 0) {
833 /* make the bits match the sub-function codes */
834 u32 low = tmp & 0x7ff;
835 u32 high = tmp & ~0xfff; /* bit 11 is reserved */
836 tmp = (high << 4) | (low << 1) | 1;
837
838 /* best guess what to do with supported wrt requested */
839 if (requested_callbacks) {
840 u32 req = opregion->swsci_sbcb_sub_functions;
841 if ((req & tmp) != req)
842 DRM_DEBUG_DRIVER("SWSCI BIOS requested (%08x) SBCB callbacks that are not supported (%08x)\n", req, tmp);
843 /* XXX: for now, trust the requested callbacks */
844 /* opregion->swsci_sbcb_sub_functions &= tmp; */
845 } else {
846 opregion->swsci_sbcb_sub_functions |= tmp;
847 }
848 }
849
850 DRM_DEBUG_DRIVER("SWSCI GBDA callbacks %08x, SBCB callbacks %08x\n",
851 opregion->swsci_gbda_sub_functions,
852 opregion->swsci_sbcb_sub_functions);
853 }
854 #else /* CONFIG_ACPI */
swsci_setup(struct drm_device * dev)855 static inline void swsci_setup(struct drm_device *dev) {}
856 #endif /* CONFIG_ACPI */
857
intel_opregion_setup(struct drm_device * dev)858 int intel_opregion_setup(struct drm_device *dev)
859 {
860 struct drm_i915_private *dev_priv = dev->dev_private;
861 struct intel_opregion *opregion = &dev_priv->opregion;
862 void __iomem *base;
863 u32 asls, mboxes;
864 char buf[sizeof(OPREGION_SIGNATURE)];
865 int err = 0;
866
867 pci_read_config_dword(dev->pdev, PCI_ASLS, &asls);
868 DRM_DEBUG_DRIVER("graphic opregion physical addr: 0x%x\n", asls);
869 if (asls == 0) {
870 DRM_DEBUG_DRIVER("ACPI OpRegion not supported!\n");
871 return -ENOTSUPP;
872 }
873
874 #ifdef CONFIG_ACPI
875 INIT_WORK(&opregion->asle_work, asle_work);
876 #endif
877
878 base = acpi_os_ioremap(asls, OPREGION_SIZE);
879 if (!base)
880 return -ENOMEM;
881
882 memcpy_fromio(buf, base, sizeof(buf));
883
884 if (memcmp(buf, OPREGION_SIGNATURE, 16)) {
885 DRM_DEBUG_DRIVER("opregion signature mismatch\n");
886 err = -EINVAL;
887 goto err_out;
888 }
889 opregion->header = base;
890 opregion->vbt = base + OPREGION_VBT_OFFSET;
891
892 opregion->lid_state = base + ACPI_CLID;
893
894 mboxes = ioread32(&opregion->header->mboxes);
895 if (mboxes & MBOX_ACPI) {
896 DRM_DEBUG_DRIVER("Public ACPI methods supported\n");
897 opregion->acpi = base + OPREGION_ACPI_OFFSET;
898 }
899
900 if (mboxes & MBOX_SWSCI) {
901 DRM_DEBUG_DRIVER("SWSCI supported\n");
902 opregion->swsci = base + OPREGION_SWSCI_OFFSET;
903 swsci_setup(dev);
904 }
905 if (mboxes & MBOX_ASLE) {
906 DRM_DEBUG_DRIVER("ASLE supported\n");
907 opregion->asle = base + OPREGION_ASLE_OFFSET;
908
909 iowrite32(ASLE_ARDY_NOT_READY, &opregion->asle->ardy);
910 }
911
912 return 0;
913
914 err_out:
915 iounmap(base);
916 return err;
917 }
918