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/drmP.h>
34 #include <drm/i915_drm.h>
35
36 #include "intel_opregion.h"
37 #include "i915_drv.h"
38 #include "intel_drv.h"
39
40 #define OPREGION_HEADER_OFFSET 0
41 #define OPREGION_ACPI_OFFSET 0x100
42 #define ACPI_CLID 0x01ac /* current lid state indicator */
43 #define ACPI_CDCK 0x01b0 /* current docking state indicator */
44 #define OPREGION_SWSCI_OFFSET 0x200
45 #define OPREGION_ASLE_OFFSET 0x300
46 #define OPREGION_VBT_OFFSET 0x400
47 #define OPREGION_ASLE_EXT_OFFSET 0x1C00
48
49 #define OPREGION_SIGNATURE "IntelGraphicsMem"
50 #define MBOX_ACPI (1<<0)
51 #define MBOX_SWSCI (1<<1)
52 #define MBOX_ASLE (1<<2)
53 #define MBOX_ASLE_EXT (1<<4)
54
55 struct opregion_header {
56 u8 signature[16];
57 u32 size;
58 u32 opregion_ver;
59 u8 bios_ver[32];
60 u8 vbios_ver[16];
61 u8 driver_ver[16];
62 u32 mboxes;
63 u32 driver_model;
64 u32 pcon;
65 u8 dver[32];
66 u8 rsvd[124];
67 } __packed;
68
69 /* OpRegion mailbox #1: public ACPI methods */
70 struct opregion_acpi {
71 u32 drdy; /* driver readiness */
72 u32 csts; /* notification status */
73 u32 cevt; /* current event */
74 u8 rsvd1[20];
75 u32 didl[8]; /* supported display devices ID list */
76 u32 cpdl[8]; /* currently presented display list */
77 u32 cadl[8]; /* currently active display list */
78 u32 nadl[8]; /* next active devices list */
79 u32 aslp; /* ASL sleep time-out */
80 u32 tidx; /* toggle table index */
81 u32 chpd; /* current hotplug enable indicator */
82 u32 clid; /* current lid state*/
83 u32 cdck; /* current docking state */
84 u32 sxsw; /* Sx state resume */
85 u32 evts; /* ASL supported events */
86 u32 cnot; /* current OS notification */
87 u32 nrdy; /* driver status */
88 u32 did2[7]; /* extended supported display devices ID list */
89 u32 cpd2[7]; /* extended attached display devices list */
90 u8 rsvd2[4];
91 } __packed;
92
93 /* OpRegion mailbox #2: SWSCI */
94 struct opregion_swsci {
95 u32 scic; /* SWSCI command|status|data */
96 u32 parm; /* command parameters */
97 u32 dslp; /* driver sleep time-out */
98 u8 rsvd[244];
99 } __packed;
100
101 /* OpRegion mailbox #3: ASLE */
102 struct opregion_asle {
103 u32 ardy; /* driver readiness */
104 u32 aslc; /* ASLE interrupt command */
105 u32 tche; /* technology enabled indicator */
106 u32 alsi; /* current ALS illuminance reading */
107 u32 bclp; /* backlight brightness to set */
108 u32 pfit; /* panel fitting state */
109 u32 cblv; /* current brightness level */
110 u16 bclm[20]; /* backlight level duty cycle mapping table */
111 u32 cpfm; /* current panel fitting mode */
112 u32 epfm; /* enabled panel fitting modes */
113 u8 plut[74]; /* panel LUT and identifier */
114 u32 pfmb; /* PWM freq and min brightness */
115 u32 cddv; /* color correction default values */
116 u32 pcft; /* power conservation features */
117 u32 srot; /* supported rotation angles */
118 u32 iuer; /* IUER events */
119 u64 fdss;
120 u32 fdsp;
121 u32 stat;
122 u64 rvda; /* Physical address of raw vbt data */
123 u32 rvds; /* Size of raw vbt data */
124 u8 rsvd[58];
125 } __packed;
126
127 /* OpRegion mailbox #5: ASLE ext */
128 struct opregion_asle_ext {
129 u32 phed; /* Panel Header */
130 u8 bddc[256]; /* Panel EDID */
131 u8 rsvd[764];
132 } __packed;
133
134 /* Driver readiness indicator */
135 #define ASLE_ARDY_READY (1 << 0)
136 #define ASLE_ARDY_NOT_READY (0 << 0)
137
138 /* ASLE Interrupt Command (ASLC) bits */
139 #define ASLC_SET_ALS_ILLUM (1 << 0)
140 #define ASLC_SET_BACKLIGHT (1 << 1)
141 #define ASLC_SET_PFIT (1 << 2)
142 #define ASLC_SET_PWM_FREQ (1 << 3)
143 #define ASLC_SUPPORTED_ROTATION_ANGLES (1 << 4)
144 #define ASLC_BUTTON_ARRAY (1 << 5)
145 #define ASLC_CONVERTIBLE_INDICATOR (1 << 6)
146 #define ASLC_DOCKING_INDICATOR (1 << 7)
147 #define ASLC_ISCT_STATE_CHANGE (1 << 8)
148 #define ASLC_REQ_MSK 0x1ff
149 /* response bits */
150 #define ASLC_ALS_ILLUM_FAILED (1 << 10)
151 #define ASLC_BACKLIGHT_FAILED (1 << 12)
152 #define ASLC_PFIT_FAILED (1 << 14)
153 #define ASLC_PWM_FREQ_FAILED (1 << 16)
154 #define ASLC_ROTATION_ANGLES_FAILED (1 << 18)
155 #define ASLC_BUTTON_ARRAY_FAILED (1 << 20)
156 #define ASLC_CONVERTIBLE_FAILED (1 << 22)
157 #define ASLC_DOCKING_FAILED (1 << 24)
158 #define ASLC_ISCT_STATE_FAILED (1 << 26)
159
160 /* Technology enabled indicator */
161 #define ASLE_TCHE_ALS_EN (1 << 0)
162 #define ASLE_TCHE_BLC_EN (1 << 1)
163 #define ASLE_TCHE_PFIT_EN (1 << 2)
164 #define ASLE_TCHE_PFMB_EN (1 << 3)
165
166 /* ASLE backlight brightness to set */
167 #define ASLE_BCLP_VALID (1<<31)
168 #define ASLE_BCLP_MSK (~(1<<31))
169
170 /* ASLE panel fitting request */
171 #define ASLE_PFIT_VALID (1<<31)
172 #define ASLE_PFIT_CENTER (1<<0)
173 #define ASLE_PFIT_STRETCH_TEXT (1<<1)
174 #define ASLE_PFIT_STRETCH_GFX (1<<2)
175
176 /* PWM frequency and minimum brightness */
177 #define ASLE_PFMB_BRIGHTNESS_MASK (0xff)
178 #define ASLE_PFMB_BRIGHTNESS_VALID (1<<8)
179 #define ASLE_PFMB_PWM_MASK (0x7ffffe00)
180 #define ASLE_PFMB_PWM_VALID (1<<31)
181
182 #define ASLE_CBLV_VALID (1<<31)
183
184 /* IUER */
185 #define ASLE_IUER_DOCKING (1 << 7)
186 #define ASLE_IUER_CONVERTIBLE (1 << 6)
187 #define ASLE_IUER_ROTATION_LOCK_BTN (1 << 4)
188 #define ASLE_IUER_VOLUME_DOWN_BTN (1 << 3)
189 #define ASLE_IUER_VOLUME_UP_BTN (1 << 2)
190 #define ASLE_IUER_WINDOWS_BTN (1 << 1)
191 #define ASLE_IUER_POWER_BTN (1 << 0)
192
193 /* Software System Control Interrupt (SWSCI) */
194 #define SWSCI_SCIC_INDICATOR (1 << 0)
195 #define SWSCI_SCIC_MAIN_FUNCTION_SHIFT 1
196 #define SWSCI_SCIC_MAIN_FUNCTION_MASK (0xf << 1)
197 #define SWSCI_SCIC_SUB_FUNCTION_SHIFT 8
198 #define SWSCI_SCIC_SUB_FUNCTION_MASK (0xff << 8)
199 #define SWSCI_SCIC_EXIT_PARAMETER_SHIFT 8
200 #define SWSCI_SCIC_EXIT_PARAMETER_MASK (0xff << 8)
201 #define SWSCI_SCIC_EXIT_STATUS_SHIFT 5
202 #define SWSCI_SCIC_EXIT_STATUS_MASK (7 << 5)
203 #define SWSCI_SCIC_EXIT_STATUS_SUCCESS 1
204
205 #define SWSCI_FUNCTION_CODE(main, sub) \
206 ((main) << SWSCI_SCIC_MAIN_FUNCTION_SHIFT | \
207 (sub) << SWSCI_SCIC_SUB_FUNCTION_SHIFT)
208
209 /* SWSCI: Get BIOS Data (GBDA) */
210 #define SWSCI_GBDA 4
211 #define SWSCI_GBDA_SUPPORTED_CALLS SWSCI_FUNCTION_CODE(SWSCI_GBDA, 0)
212 #define SWSCI_GBDA_REQUESTED_CALLBACKS SWSCI_FUNCTION_CODE(SWSCI_GBDA, 1)
213 #define SWSCI_GBDA_BOOT_DISPLAY_PREF SWSCI_FUNCTION_CODE(SWSCI_GBDA, 4)
214 #define SWSCI_GBDA_PANEL_DETAILS SWSCI_FUNCTION_CODE(SWSCI_GBDA, 5)
215 #define SWSCI_GBDA_TV_STANDARD SWSCI_FUNCTION_CODE(SWSCI_GBDA, 6)
216 #define SWSCI_GBDA_INTERNAL_GRAPHICS SWSCI_FUNCTION_CODE(SWSCI_GBDA, 7)
217 #define SWSCI_GBDA_SPREAD_SPECTRUM SWSCI_FUNCTION_CODE(SWSCI_GBDA, 10)
218
219 /* SWSCI: System BIOS Callbacks (SBCB) */
220 #define SWSCI_SBCB 6
221 #define SWSCI_SBCB_SUPPORTED_CALLBACKS SWSCI_FUNCTION_CODE(SWSCI_SBCB, 0)
222 #define SWSCI_SBCB_INIT_COMPLETION SWSCI_FUNCTION_CODE(SWSCI_SBCB, 1)
223 #define SWSCI_SBCB_PRE_HIRES_SET_MODE SWSCI_FUNCTION_CODE(SWSCI_SBCB, 3)
224 #define SWSCI_SBCB_POST_HIRES_SET_MODE SWSCI_FUNCTION_CODE(SWSCI_SBCB, 4)
225 #define SWSCI_SBCB_DISPLAY_SWITCH SWSCI_FUNCTION_CODE(SWSCI_SBCB, 5)
226 #define SWSCI_SBCB_SET_TV_FORMAT SWSCI_FUNCTION_CODE(SWSCI_SBCB, 6)
227 #define SWSCI_SBCB_ADAPTER_POWER_STATE SWSCI_FUNCTION_CODE(SWSCI_SBCB, 7)
228 #define SWSCI_SBCB_DISPLAY_POWER_STATE SWSCI_FUNCTION_CODE(SWSCI_SBCB, 8)
229 #define SWSCI_SBCB_SET_BOOT_DISPLAY SWSCI_FUNCTION_CODE(SWSCI_SBCB, 9)
230 #define SWSCI_SBCB_SET_PANEL_DETAILS SWSCI_FUNCTION_CODE(SWSCI_SBCB, 10)
231 #define SWSCI_SBCB_SET_INTERNAL_GFX SWSCI_FUNCTION_CODE(SWSCI_SBCB, 11)
232 #define SWSCI_SBCB_POST_HIRES_TO_DOS_FS SWSCI_FUNCTION_CODE(SWSCI_SBCB, 16)
233 #define SWSCI_SBCB_SUSPEND_RESUME SWSCI_FUNCTION_CODE(SWSCI_SBCB, 17)
234 #define SWSCI_SBCB_SET_SPREAD_SPECTRUM SWSCI_FUNCTION_CODE(SWSCI_SBCB, 18)
235 #define SWSCI_SBCB_POST_VBE_PM SWSCI_FUNCTION_CODE(SWSCI_SBCB, 19)
236 #define SWSCI_SBCB_ENABLE_DISABLE_AUDIO SWSCI_FUNCTION_CODE(SWSCI_SBCB, 21)
237
238 /*
239 * ACPI Specification, Revision 5.0, Appendix B.3.2 _DOD (Enumerate All Devices
240 * Attached to the Display Adapter).
241 */
242 #define ACPI_DISPLAY_INDEX_SHIFT 0
243 #define ACPI_DISPLAY_INDEX_MASK (0xf << 0)
244 #define ACPI_DISPLAY_PORT_ATTACHMENT_SHIFT 4
245 #define ACPI_DISPLAY_PORT_ATTACHMENT_MASK (0xf << 4)
246 #define ACPI_DISPLAY_TYPE_SHIFT 8
247 #define ACPI_DISPLAY_TYPE_MASK (0xf << 8)
248 #define ACPI_DISPLAY_TYPE_OTHER (0 << 8)
249 #define ACPI_DISPLAY_TYPE_VGA (1 << 8)
250 #define ACPI_DISPLAY_TYPE_TV (2 << 8)
251 #define ACPI_DISPLAY_TYPE_EXTERNAL_DIGITAL (3 << 8)
252 #define ACPI_DISPLAY_TYPE_INTERNAL_DIGITAL (4 << 8)
253 #define ACPI_VENDOR_SPECIFIC_SHIFT 12
254 #define ACPI_VENDOR_SPECIFIC_MASK (0xf << 12)
255 #define ACPI_BIOS_CAN_DETECT (1 << 16)
256 #define ACPI_DEPENDS_ON_VGA (1 << 17)
257 #define ACPI_PIPE_ID_SHIFT 18
258 #define ACPI_PIPE_ID_MASK (7 << 18)
259 #define ACPI_DEVICE_ID_SCHEME (1 << 31)
260
261 #define MAX_DSLP 1500
262
swsci(struct drm_i915_private * dev_priv,u32 function,u32 parm,u32 * parm_out)263 static int swsci(struct drm_i915_private *dev_priv,
264 u32 function, u32 parm, u32 *parm_out)
265 {
266 struct opregion_swsci *swsci = dev_priv->opregion.swsci;
267 struct pci_dev *pdev = dev_priv->drm.pdev;
268 u32 main_function, sub_function, scic;
269 u16 swsci_val;
270 u32 dslp;
271
272 if (!swsci)
273 return -ENODEV;
274
275 main_function = (function & SWSCI_SCIC_MAIN_FUNCTION_MASK) >>
276 SWSCI_SCIC_MAIN_FUNCTION_SHIFT;
277 sub_function = (function & SWSCI_SCIC_SUB_FUNCTION_MASK) >>
278 SWSCI_SCIC_SUB_FUNCTION_SHIFT;
279
280 /* Check if we can call the function. See swsci_setup for details. */
281 if (main_function == SWSCI_SBCB) {
282 if ((dev_priv->opregion.swsci_sbcb_sub_functions &
283 (1 << sub_function)) == 0)
284 return -EINVAL;
285 } else if (main_function == SWSCI_GBDA) {
286 if ((dev_priv->opregion.swsci_gbda_sub_functions &
287 (1 << sub_function)) == 0)
288 return -EINVAL;
289 }
290
291 /* Driver sleep timeout in ms. */
292 dslp = swsci->dslp;
293 if (!dslp) {
294 /* The spec says 2ms should be the default, but it's too small
295 * for some machines. */
296 dslp = 50;
297 } else if (dslp > MAX_DSLP) {
298 /* Hey bios, trust must be earned. */
299 DRM_INFO_ONCE("ACPI BIOS requests an excessive sleep of %u ms, "
300 "using %u ms instead\n", dslp, MAX_DSLP);
301 dslp = MAX_DSLP;
302 }
303
304 /* The spec tells us to do this, but we are the only user... */
305 scic = swsci->scic;
306 if (scic & SWSCI_SCIC_INDICATOR) {
307 DRM_DEBUG_DRIVER("SWSCI request already in progress\n");
308 return -EBUSY;
309 }
310
311 scic = function | SWSCI_SCIC_INDICATOR;
312
313 swsci->parm = parm;
314 swsci->scic = scic;
315
316 /* Ensure SCI event is selected and event trigger is cleared. */
317 pci_read_config_word(pdev, SWSCI, &swsci_val);
318 if (!(swsci_val & SWSCI_SCISEL) || (swsci_val & SWSCI_GSSCIE)) {
319 swsci_val |= SWSCI_SCISEL;
320 swsci_val &= ~SWSCI_GSSCIE;
321 pci_write_config_word(pdev, SWSCI, swsci_val);
322 }
323
324 /* Use event trigger to tell bios to check the mail. */
325 swsci_val |= SWSCI_GSSCIE;
326 pci_write_config_word(pdev, SWSCI, swsci_val);
327
328 /* Poll for the result. */
329 #define C (((scic = swsci->scic) & SWSCI_SCIC_INDICATOR) == 0)
330 if (wait_for(C, dslp)) {
331 DRM_DEBUG_DRIVER("SWSCI request timed out\n");
332 return -ETIMEDOUT;
333 }
334
335 scic = (scic & SWSCI_SCIC_EXIT_STATUS_MASK) >>
336 SWSCI_SCIC_EXIT_STATUS_SHIFT;
337
338 /* Note: scic == 0 is an error! */
339 if (scic != SWSCI_SCIC_EXIT_STATUS_SUCCESS) {
340 DRM_DEBUG_DRIVER("SWSCI request error %u\n", scic);
341 return -EIO;
342 }
343
344 if (parm_out)
345 *parm_out = swsci->parm;
346
347 return 0;
348
349 #undef C
350 }
351
352 #define DISPLAY_TYPE_CRT 0
353 #define DISPLAY_TYPE_TV 1
354 #define DISPLAY_TYPE_EXTERNAL_FLAT_PANEL 2
355 #define DISPLAY_TYPE_INTERNAL_FLAT_PANEL 3
356
intel_opregion_notify_encoder(struct intel_encoder * intel_encoder,bool enable)357 int intel_opregion_notify_encoder(struct intel_encoder *intel_encoder,
358 bool enable)
359 {
360 struct drm_i915_private *dev_priv = to_i915(intel_encoder->base.dev);
361 u32 parm = 0;
362 u32 type = 0;
363 u32 port;
364
365 /* don't care about old stuff for now */
366 if (!HAS_DDI(dev_priv))
367 return 0;
368
369 if (intel_encoder->type == INTEL_OUTPUT_DSI)
370 port = 0;
371 else
372 port = intel_encoder->port;
373
374 if (port == PORT_E) {
375 port = 0;
376 } else {
377 parm |= 1 << port;
378 port++;
379 }
380
381 if (!enable)
382 parm |= 4 << 8;
383
384 switch (intel_encoder->type) {
385 case INTEL_OUTPUT_ANALOG:
386 type = DISPLAY_TYPE_CRT;
387 break;
388 case INTEL_OUTPUT_DDI:
389 case INTEL_OUTPUT_DP:
390 case INTEL_OUTPUT_HDMI:
391 case INTEL_OUTPUT_DP_MST:
392 type = DISPLAY_TYPE_EXTERNAL_FLAT_PANEL;
393 break;
394 case INTEL_OUTPUT_EDP:
395 case INTEL_OUTPUT_DSI:
396 type = DISPLAY_TYPE_INTERNAL_FLAT_PANEL;
397 break;
398 default:
399 WARN_ONCE(1, "unsupported intel_encoder type %d\n",
400 intel_encoder->type);
401 return -EINVAL;
402 }
403
404 parm |= type << (16 + port * 3);
405
406 return swsci(dev_priv, SWSCI_SBCB_DISPLAY_POWER_STATE, parm, NULL);
407 }
408
409 static const struct {
410 pci_power_t pci_power_state;
411 u32 parm;
412 } power_state_map[] = {
413 { PCI_D0, 0x00 },
414 { PCI_D1, 0x01 },
415 { PCI_D2, 0x02 },
416 { PCI_D3hot, 0x04 },
417 { PCI_D3cold, 0x04 },
418 };
419
intel_opregion_notify_adapter(struct drm_i915_private * dev_priv,pci_power_t state)420 int intel_opregion_notify_adapter(struct drm_i915_private *dev_priv,
421 pci_power_t state)
422 {
423 int i;
424
425 if (!HAS_DDI(dev_priv))
426 return 0;
427
428 for (i = 0; i < ARRAY_SIZE(power_state_map); i++) {
429 if (state == power_state_map[i].pci_power_state)
430 return swsci(dev_priv, SWSCI_SBCB_ADAPTER_POWER_STATE,
431 power_state_map[i].parm, NULL);
432 }
433
434 return -EINVAL;
435 }
436
asle_set_backlight(struct drm_i915_private * dev_priv,u32 bclp)437 static u32 asle_set_backlight(struct drm_i915_private *dev_priv, u32 bclp)
438 {
439 struct intel_connector *connector;
440 struct drm_connector_list_iter conn_iter;
441 struct opregion_asle *asle = dev_priv->opregion.asle;
442 struct drm_device *dev = &dev_priv->drm;
443
444 DRM_DEBUG_DRIVER("bclp = 0x%08x\n", bclp);
445
446 if (acpi_video_get_backlight_type() == acpi_backlight_native) {
447 DRM_DEBUG_KMS("opregion backlight request ignored\n");
448 return 0;
449 }
450
451 if (!(bclp & ASLE_BCLP_VALID))
452 return ASLC_BACKLIGHT_FAILED;
453
454 bclp &= ASLE_BCLP_MSK;
455 if (bclp > 255)
456 return ASLC_BACKLIGHT_FAILED;
457
458 drm_modeset_lock(&dev->mode_config.connection_mutex, NULL);
459
460 /*
461 * Update backlight on all connectors that support backlight (usually
462 * only one).
463 */
464 DRM_DEBUG_KMS("updating opregion backlight %d/255\n", bclp);
465 drm_connector_list_iter_begin(dev, &conn_iter);
466 for_each_intel_connector_iter(connector, &conn_iter)
467 intel_panel_set_backlight_acpi(connector->base.state, bclp, 255);
468 drm_connector_list_iter_end(&conn_iter);
469 asle->cblv = DIV_ROUND_UP(bclp * 100, 255) | ASLE_CBLV_VALID;
470
471 drm_modeset_unlock(&dev->mode_config.connection_mutex);
472
473
474 return 0;
475 }
476
asle_set_als_illum(struct drm_i915_private * dev_priv,u32 alsi)477 static u32 asle_set_als_illum(struct drm_i915_private *dev_priv, u32 alsi)
478 {
479 /* alsi is the current ALS reading in lux. 0 indicates below sensor
480 range, 0xffff indicates above sensor range. 1-0xfffe are valid */
481 DRM_DEBUG_DRIVER("Illum is not supported\n");
482 return ASLC_ALS_ILLUM_FAILED;
483 }
484
asle_set_pwm_freq(struct drm_i915_private * dev_priv,u32 pfmb)485 static u32 asle_set_pwm_freq(struct drm_i915_private *dev_priv, u32 pfmb)
486 {
487 DRM_DEBUG_DRIVER("PWM freq is not supported\n");
488 return ASLC_PWM_FREQ_FAILED;
489 }
490
asle_set_pfit(struct drm_i915_private * dev_priv,u32 pfit)491 static u32 asle_set_pfit(struct drm_i915_private *dev_priv, u32 pfit)
492 {
493 /* Panel fitting is currently controlled by the X code, so this is a
494 noop until modesetting support works fully */
495 DRM_DEBUG_DRIVER("Pfit is not supported\n");
496 return ASLC_PFIT_FAILED;
497 }
498
asle_set_supported_rotation_angles(struct drm_i915_private * dev_priv,u32 srot)499 static u32 asle_set_supported_rotation_angles(struct drm_i915_private *dev_priv, u32 srot)
500 {
501 DRM_DEBUG_DRIVER("SROT is not supported\n");
502 return ASLC_ROTATION_ANGLES_FAILED;
503 }
504
asle_set_button_array(struct drm_i915_private * dev_priv,u32 iuer)505 static u32 asle_set_button_array(struct drm_i915_private *dev_priv, u32 iuer)
506 {
507 if (!iuer)
508 DRM_DEBUG_DRIVER("Button array event is not supported (nothing)\n");
509 if (iuer & ASLE_IUER_ROTATION_LOCK_BTN)
510 DRM_DEBUG_DRIVER("Button array event is not supported (rotation lock)\n");
511 if (iuer & ASLE_IUER_VOLUME_DOWN_BTN)
512 DRM_DEBUG_DRIVER("Button array event is not supported (volume down)\n");
513 if (iuer & ASLE_IUER_VOLUME_UP_BTN)
514 DRM_DEBUG_DRIVER("Button array event is not supported (volume up)\n");
515 if (iuer & ASLE_IUER_WINDOWS_BTN)
516 DRM_DEBUG_DRIVER("Button array event is not supported (windows)\n");
517 if (iuer & ASLE_IUER_POWER_BTN)
518 DRM_DEBUG_DRIVER("Button array event is not supported (power)\n");
519
520 return ASLC_BUTTON_ARRAY_FAILED;
521 }
522
asle_set_convertible(struct drm_i915_private * dev_priv,u32 iuer)523 static u32 asle_set_convertible(struct drm_i915_private *dev_priv, u32 iuer)
524 {
525 if (iuer & ASLE_IUER_CONVERTIBLE)
526 DRM_DEBUG_DRIVER("Convertible is not supported (clamshell)\n");
527 else
528 DRM_DEBUG_DRIVER("Convertible is not supported (slate)\n");
529
530 return ASLC_CONVERTIBLE_FAILED;
531 }
532
asle_set_docking(struct drm_i915_private * dev_priv,u32 iuer)533 static u32 asle_set_docking(struct drm_i915_private *dev_priv, u32 iuer)
534 {
535 if (iuer & ASLE_IUER_DOCKING)
536 DRM_DEBUG_DRIVER("Docking is not supported (docked)\n");
537 else
538 DRM_DEBUG_DRIVER("Docking is not supported (undocked)\n");
539
540 return ASLC_DOCKING_FAILED;
541 }
542
asle_isct_state(struct drm_i915_private * dev_priv)543 static u32 asle_isct_state(struct drm_i915_private *dev_priv)
544 {
545 DRM_DEBUG_DRIVER("ISCT is not supported\n");
546 return ASLC_ISCT_STATE_FAILED;
547 }
548
asle_work(struct work_struct * work)549 static void asle_work(struct work_struct *work)
550 {
551 struct intel_opregion *opregion =
552 container_of(work, struct intel_opregion, asle_work);
553 struct drm_i915_private *dev_priv =
554 container_of(opregion, struct drm_i915_private, opregion);
555 struct opregion_asle *asle = dev_priv->opregion.asle;
556 u32 aslc_stat = 0;
557 u32 aslc_req;
558
559 if (!asle)
560 return;
561
562 aslc_req = asle->aslc;
563
564 if (!(aslc_req & ASLC_REQ_MSK)) {
565 DRM_DEBUG_DRIVER("No request on ASLC interrupt 0x%08x\n",
566 aslc_req);
567 return;
568 }
569
570 if (aslc_req & ASLC_SET_ALS_ILLUM)
571 aslc_stat |= asle_set_als_illum(dev_priv, asle->alsi);
572
573 if (aslc_req & ASLC_SET_BACKLIGHT)
574 aslc_stat |= asle_set_backlight(dev_priv, asle->bclp);
575
576 if (aslc_req & ASLC_SET_PFIT)
577 aslc_stat |= asle_set_pfit(dev_priv, asle->pfit);
578
579 if (aslc_req & ASLC_SET_PWM_FREQ)
580 aslc_stat |= asle_set_pwm_freq(dev_priv, asle->pfmb);
581
582 if (aslc_req & ASLC_SUPPORTED_ROTATION_ANGLES)
583 aslc_stat |= asle_set_supported_rotation_angles(dev_priv,
584 asle->srot);
585
586 if (aslc_req & ASLC_BUTTON_ARRAY)
587 aslc_stat |= asle_set_button_array(dev_priv, asle->iuer);
588
589 if (aslc_req & ASLC_CONVERTIBLE_INDICATOR)
590 aslc_stat |= asle_set_convertible(dev_priv, asle->iuer);
591
592 if (aslc_req & ASLC_DOCKING_INDICATOR)
593 aslc_stat |= asle_set_docking(dev_priv, asle->iuer);
594
595 if (aslc_req & ASLC_ISCT_STATE_CHANGE)
596 aslc_stat |= asle_isct_state(dev_priv);
597
598 asle->aslc = aslc_stat;
599 }
600
intel_opregion_asle_intr(struct drm_i915_private * dev_priv)601 void intel_opregion_asle_intr(struct drm_i915_private *dev_priv)
602 {
603 if (dev_priv->opregion.asle)
604 schedule_work(&dev_priv->opregion.asle_work);
605 }
606
607 #define ACPI_EV_DISPLAY_SWITCH (1<<0)
608 #define ACPI_EV_LID (1<<1)
609 #define ACPI_EV_DOCK (1<<2)
610
611 /*
612 * The only video events relevant to opregion are 0x80. These indicate either a
613 * docking event, lid switch or display switch request. In Linux, these are
614 * handled by the dock, button and video drivers.
615 */
intel_opregion_video_event(struct notifier_block * nb,unsigned long val,void * data)616 static int intel_opregion_video_event(struct notifier_block *nb,
617 unsigned long val, void *data)
618 {
619 struct intel_opregion *opregion = container_of(nb, struct intel_opregion,
620 acpi_notifier);
621 struct acpi_bus_event *event = data;
622 struct opregion_acpi *acpi;
623 int ret = NOTIFY_OK;
624
625 if (strcmp(event->device_class, ACPI_VIDEO_CLASS) != 0)
626 return NOTIFY_DONE;
627
628 acpi = opregion->acpi;
629
630 if (event->type == 0x80 && ((acpi->cevt & 1) == 0))
631 ret = NOTIFY_BAD;
632
633 acpi->csts = 0;
634
635 return ret;
636 }
637
638 /*
639 * Initialise the DIDL field in opregion. This passes a list of devices to
640 * the firmware. Values are defined by section B.4.2 of the ACPI specification
641 * (version 3)
642 */
643
set_did(struct intel_opregion * opregion,int i,u32 val)644 static void set_did(struct intel_opregion *opregion, int i, u32 val)
645 {
646 if (i < ARRAY_SIZE(opregion->acpi->didl)) {
647 opregion->acpi->didl[i] = val;
648 } else {
649 i -= ARRAY_SIZE(opregion->acpi->didl);
650
651 if (WARN_ON(i >= ARRAY_SIZE(opregion->acpi->did2)))
652 return;
653
654 opregion->acpi->did2[i] = val;
655 }
656 }
657
acpi_display_type(struct intel_connector * connector)658 static u32 acpi_display_type(struct intel_connector *connector)
659 {
660 u32 display_type;
661
662 switch (connector->base.connector_type) {
663 case DRM_MODE_CONNECTOR_VGA:
664 case DRM_MODE_CONNECTOR_DVIA:
665 display_type = ACPI_DISPLAY_TYPE_VGA;
666 break;
667 case DRM_MODE_CONNECTOR_Composite:
668 case DRM_MODE_CONNECTOR_SVIDEO:
669 case DRM_MODE_CONNECTOR_Component:
670 case DRM_MODE_CONNECTOR_9PinDIN:
671 case DRM_MODE_CONNECTOR_TV:
672 display_type = ACPI_DISPLAY_TYPE_TV;
673 break;
674 case DRM_MODE_CONNECTOR_DVII:
675 case DRM_MODE_CONNECTOR_DVID:
676 case DRM_MODE_CONNECTOR_DisplayPort:
677 case DRM_MODE_CONNECTOR_HDMIA:
678 case DRM_MODE_CONNECTOR_HDMIB:
679 display_type = ACPI_DISPLAY_TYPE_EXTERNAL_DIGITAL;
680 break;
681 case DRM_MODE_CONNECTOR_LVDS:
682 case DRM_MODE_CONNECTOR_eDP:
683 case DRM_MODE_CONNECTOR_DSI:
684 display_type = ACPI_DISPLAY_TYPE_INTERNAL_DIGITAL;
685 break;
686 case DRM_MODE_CONNECTOR_Unknown:
687 case DRM_MODE_CONNECTOR_VIRTUAL:
688 display_type = ACPI_DISPLAY_TYPE_OTHER;
689 break;
690 default:
691 MISSING_CASE(connector->base.connector_type);
692 display_type = ACPI_DISPLAY_TYPE_OTHER;
693 break;
694 }
695
696 return display_type;
697 }
698
intel_didl_outputs(struct drm_i915_private * dev_priv)699 static void intel_didl_outputs(struct drm_i915_private *dev_priv)
700 {
701 struct intel_opregion *opregion = &dev_priv->opregion;
702 struct intel_connector *connector;
703 struct drm_connector_list_iter conn_iter;
704 int i = 0, max_outputs;
705 int display_index[16] = {};
706
707 /*
708 * In theory, did2, the extended didl, gets added at opregion version
709 * 3.0. In practice, however, we're supposed to set it for earlier
710 * versions as well, since a BIOS that doesn't understand did2 should
711 * not look at it anyway. Use a variable so we can tweak this if a need
712 * arises later.
713 */
714 max_outputs = ARRAY_SIZE(opregion->acpi->didl) +
715 ARRAY_SIZE(opregion->acpi->did2);
716
717 drm_connector_list_iter_begin(&dev_priv->drm, &conn_iter);
718 for_each_intel_connector_iter(connector, &conn_iter) {
719 u32 device_id, type;
720
721 device_id = acpi_display_type(connector);
722
723 /* Use display type specific display index. */
724 type = (device_id & ACPI_DISPLAY_TYPE_MASK)
725 >> ACPI_DISPLAY_TYPE_SHIFT;
726 device_id |= display_index[type]++ << ACPI_DISPLAY_INDEX_SHIFT;
727
728 connector->acpi_device_id = device_id;
729 if (i < max_outputs)
730 set_did(opregion, i, device_id);
731 i++;
732 }
733 drm_connector_list_iter_end(&conn_iter);
734
735 DRM_DEBUG_KMS("%d outputs detected\n", i);
736
737 if (i > max_outputs)
738 DRM_ERROR("More than %d outputs in connector list\n",
739 max_outputs);
740
741 /* If fewer than max outputs, the list must be null terminated */
742 if (i < max_outputs)
743 set_did(opregion, i, 0);
744 }
745
intel_setup_cadls(struct drm_i915_private * dev_priv)746 static void intel_setup_cadls(struct drm_i915_private *dev_priv)
747 {
748 struct intel_opregion *opregion = &dev_priv->opregion;
749 struct intel_connector *connector;
750 struct drm_connector_list_iter conn_iter;
751 int i = 0;
752
753 /*
754 * Initialize the CADL field from the connector device ids. This is
755 * essentially the same as copying from the DIDL. Technically, this is
756 * not always correct as display outputs may exist, but not active. This
757 * initialization is necessary for some Clevo laptops that check this
758 * field before processing the brightness and display switching hotkeys.
759 *
760 * Note that internal panels should be at the front of the connector
761 * list already, ensuring they're not left out.
762 */
763 drm_connector_list_iter_begin(&dev_priv->drm, &conn_iter);
764 for_each_intel_connector_iter(connector, &conn_iter) {
765 if (i >= ARRAY_SIZE(opregion->acpi->cadl))
766 break;
767 opregion->acpi->cadl[i++] = connector->acpi_device_id;
768 }
769 drm_connector_list_iter_end(&conn_iter);
770
771 /* If fewer than 8 active devices, the list must be null terminated */
772 if (i < ARRAY_SIZE(opregion->acpi->cadl))
773 opregion->acpi->cadl[i] = 0;
774 }
775
intel_opregion_register(struct drm_i915_private * dev_priv)776 void intel_opregion_register(struct drm_i915_private *dev_priv)
777 {
778 struct intel_opregion *opregion = &dev_priv->opregion;
779
780 if (!opregion->header)
781 return;
782
783 if (opregion->acpi) {
784 intel_didl_outputs(dev_priv);
785 intel_setup_cadls(dev_priv);
786
787 /* Notify BIOS we are ready to handle ACPI video ext notifs.
788 * Right now, all the events are handled by the ACPI video module.
789 * We don't actually need to do anything with them. */
790 opregion->acpi->csts = 0;
791 opregion->acpi->drdy = 1;
792
793 opregion->acpi_notifier.notifier_call = intel_opregion_video_event;
794 register_acpi_notifier(&opregion->acpi_notifier);
795 }
796
797 if (opregion->asle) {
798 opregion->asle->tche = ASLE_TCHE_BLC_EN;
799 opregion->asle->ardy = ASLE_ARDY_READY;
800 }
801 }
802
intel_opregion_unregister(struct drm_i915_private * dev_priv)803 void intel_opregion_unregister(struct drm_i915_private *dev_priv)
804 {
805 struct intel_opregion *opregion = &dev_priv->opregion;
806
807 if (!opregion->header)
808 return;
809
810 if (opregion->asle)
811 opregion->asle->ardy = ASLE_ARDY_NOT_READY;
812
813 cancel_work_sync(&dev_priv->opregion.asle_work);
814
815 if (opregion->acpi) {
816 opregion->acpi->drdy = 0;
817
818 unregister_acpi_notifier(&opregion->acpi_notifier);
819 opregion->acpi_notifier.notifier_call = NULL;
820 }
821
822 /* just clear all opregion memory pointers now */
823 memunmap(opregion->header);
824 if (opregion->rvda) {
825 memunmap(opregion->rvda);
826 opregion->rvda = NULL;
827 }
828 if (opregion->vbt_firmware) {
829 kfree(opregion->vbt_firmware);
830 opregion->vbt_firmware = NULL;
831 }
832 opregion->header = NULL;
833 opregion->acpi = NULL;
834 opregion->swsci = NULL;
835 opregion->asle = NULL;
836 opregion->vbt = NULL;
837 opregion->lid_state = NULL;
838 }
839
swsci_setup(struct drm_i915_private * dev_priv)840 static void swsci_setup(struct drm_i915_private *dev_priv)
841 {
842 struct intel_opregion *opregion = &dev_priv->opregion;
843 bool requested_callbacks = false;
844 u32 tmp;
845
846 /* Sub-function code 0 is okay, let's allow them. */
847 opregion->swsci_gbda_sub_functions = 1;
848 opregion->swsci_sbcb_sub_functions = 1;
849
850 /* We use GBDA to ask for supported GBDA calls. */
851 if (swsci(dev_priv, SWSCI_GBDA_SUPPORTED_CALLS, 0, &tmp) == 0) {
852 /* make the bits match the sub-function codes */
853 tmp <<= 1;
854 opregion->swsci_gbda_sub_functions |= tmp;
855 }
856
857 /*
858 * We also use GBDA to ask for _requested_ SBCB callbacks. The driver
859 * must not call interfaces that are not specifically requested by the
860 * bios.
861 */
862 if (swsci(dev_priv, SWSCI_GBDA_REQUESTED_CALLBACKS, 0, &tmp) == 0) {
863 /* here, the bits already match sub-function codes */
864 opregion->swsci_sbcb_sub_functions |= tmp;
865 requested_callbacks = true;
866 }
867
868 /*
869 * But we use SBCB to ask for _supported_ SBCB calls. This does not mean
870 * the callback is _requested_. But we still can't call interfaces that
871 * are not requested.
872 */
873 if (swsci(dev_priv, SWSCI_SBCB_SUPPORTED_CALLBACKS, 0, &tmp) == 0) {
874 /* make the bits match the sub-function codes */
875 u32 low = tmp & 0x7ff;
876 u32 high = tmp & ~0xfff; /* bit 11 is reserved */
877 tmp = (high << 4) | (low << 1) | 1;
878
879 /* best guess what to do with supported wrt requested */
880 if (requested_callbacks) {
881 u32 req = opregion->swsci_sbcb_sub_functions;
882 if ((req & tmp) != req)
883 DRM_DEBUG_DRIVER("SWSCI BIOS requested (%08x) SBCB callbacks that are not supported (%08x)\n", req, tmp);
884 /* XXX: for now, trust the requested callbacks */
885 /* opregion->swsci_sbcb_sub_functions &= tmp; */
886 } else {
887 opregion->swsci_sbcb_sub_functions |= tmp;
888 }
889 }
890
891 DRM_DEBUG_DRIVER("SWSCI GBDA callbacks %08x, SBCB callbacks %08x\n",
892 opregion->swsci_gbda_sub_functions,
893 opregion->swsci_sbcb_sub_functions);
894 }
895
intel_no_opregion_vbt_callback(const struct dmi_system_id * id)896 static int intel_no_opregion_vbt_callback(const struct dmi_system_id *id)
897 {
898 DRM_DEBUG_KMS("Falling back to manually reading VBT from "
899 "VBIOS ROM for %s\n", id->ident);
900 return 1;
901 }
902
903 static const struct dmi_system_id intel_no_opregion_vbt[] = {
904 {
905 .callback = intel_no_opregion_vbt_callback,
906 .ident = "ThinkCentre A57",
907 .matches = {
908 DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
909 DMI_MATCH(DMI_PRODUCT_NAME, "97027RG"),
910 },
911 },
912 { }
913 };
914
intel_load_vbt_firmware(struct drm_i915_private * dev_priv)915 static int intel_load_vbt_firmware(struct drm_i915_private *dev_priv)
916 {
917 struct intel_opregion *opregion = &dev_priv->opregion;
918 const struct firmware *fw = NULL;
919 const char *name = i915_modparams.vbt_firmware;
920 int ret;
921
922 if (!name || !*name)
923 return -ENOENT;
924
925 ret = request_firmware(&fw, name, &dev_priv->drm.pdev->dev);
926 if (ret) {
927 DRM_ERROR("Requesting VBT firmware \"%s\" failed (%d)\n",
928 name, ret);
929 return ret;
930 }
931
932 if (intel_bios_is_valid_vbt(fw->data, fw->size)) {
933 opregion->vbt_firmware = kmemdup(fw->data, fw->size, GFP_KERNEL);
934 if (opregion->vbt_firmware) {
935 DRM_DEBUG_KMS("Found valid VBT firmware \"%s\"\n", name);
936 opregion->vbt = opregion->vbt_firmware;
937 opregion->vbt_size = fw->size;
938 ret = 0;
939 } else {
940 ret = -ENOMEM;
941 }
942 } else {
943 DRM_DEBUG_KMS("Invalid VBT firmware \"%s\"\n", name);
944 ret = -EINVAL;
945 }
946
947 release_firmware(fw);
948
949 return ret;
950 }
951
intel_opregion_setup(struct drm_i915_private * dev_priv)952 int intel_opregion_setup(struct drm_i915_private *dev_priv)
953 {
954 struct intel_opregion *opregion = &dev_priv->opregion;
955 struct pci_dev *pdev = dev_priv->drm.pdev;
956 u32 asls, mboxes;
957 char buf[sizeof(OPREGION_SIGNATURE)];
958 int err = 0;
959 void *base;
960 const void *vbt;
961 u32 vbt_size;
962
963 BUILD_BUG_ON(sizeof(struct opregion_header) != 0x100);
964 BUILD_BUG_ON(sizeof(struct opregion_acpi) != 0x100);
965 BUILD_BUG_ON(sizeof(struct opregion_swsci) != 0x100);
966 BUILD_BUG_ON(sizeof(struct opregion_asle) != 0x100);
967 BUILD_BUG_ON(sizeof(struct opregion_asle_ext) != 0x400);
968
969 pci_read_config_dword(pdev, ASLS, &asls);
970 DRM_DEBUG_DRIVER("graphic opregion physical addr: 0x%x\n", asls);
971 if (asls == 0) {
972 DRM_DEBUG_DRIVER("ACPI OpRegion not supported!\n");
973 return -ENOTSUPP;
974 }
975
976 INIT_WORK(&opregion->asle_work, asle_work);
977
978 base = memremap(asls, OPREGION_SIZE, MEMREMAP_WB);
979 if (!base)
980 return -ENOMEM;
981
982 memcpy(buf, base, sizeof(buf));
983
984 if (memcmp(buf, OPREGION_SIGNATURE, 16)) {
985 DRM_DEBUG_DRIVER("opregion signature mismatch\n");
986 err = -EINVAL;
987 goto err_out;
988 }
989 opregion->header = base;
990 opregion->lid_state = base + ACPI_CLID;
991
992 mboxes = opregion->header->mboxes;
993 if (mboxes & MBOX_ACPI) {
994 DRM_DEBUG_DRIVER("Public ACPI methods supported\n");
995 opregion->acpi = base + OPREGION_ACPI_OFFSET;
996 }
997
998 if (mboxes & MBOX_SWSCI) {
999 DRM_DEBUG_DRIVER("SWSCI supported\n");
1000 opregion->swsci = base + OPREGION_SWSCI_OFFSET;
1001 swsci_setup(dev_priv);
1002 }
1003
1004 if (mboxes & MBOX_ASLE) {
1005 DRM_DEBUG_DRIVER("ASLE supported\n");
1006 opregion->asle = base + OPREGION_ASLE_OFFSET;
1007
1008 opregion->asle->ardy = ASLE_ARDY_NOT_READY;
1009 }
1010
1011 if (mboxes & MBOX_ASLE_EXT)
1012 DRM_DEBUG_DRIVER("ASLE extension supported\n");
1013
1014 if (intel_load_vbt_firmware(dev_priv) == 0)
1015 goto out;
1016
1017 if (dmi_check_system(intel_no_opregion_vbt))
1018 goto out;
1019
1020 if (opregion->header->opregion_ver >= 2 && opregion->asle &&
1021 opregion->asle->rvda && opregion->asle->rvds) {
1022 opregion->rvda = memremap(opregion->asle->rvda,
1023 opregion->asle->rvds,
1024 MEMREMAP_WB);
1025 vbt = opregion->rvda;
1026 vbt_size = opregion->asle->rvds;
1027 if (intel_bios_is_valid_vbt(vbt, vbt_size)) {
1028 DRM_DEBUG_KMS("Found valid VBT in ACPI OpRegion (RVDA)\n");
1029 opregion->vbt = vbt;
1030 opregion->vbt_size = vbt_size;
1031 goto out;
1032 } else {
1033 DRM_DEBUG_KMS("Invalid VBT in ACPI OpRegion (RVDA)\n");
1034 }
1035 }
1036
1037 vbt = base + OPREGION_VBT_OFFSET;
1038 /*
1039 * The VBT specification says that if the ASLE ext mailbox is not used
1040 * its area is reserved, but on some CHT boards the VBT extends into the
1041 * ASLE ext area. Allow this even though it is against the spec, so we
1042 * do not end up rejecting the VBT on those boards (and end up not
1043 * finding the LCD panel because of this).
1044 */
1045 vbt_size = (mboxes & MBOX_ASLE_EXT) ?
1046 OPREGION_ASLE_EXT_OFFSET : OPREGION_SIZE;
1047 vbt_size -= OPREGION_VBT_OFFSET;
1048 if (intel_bios_is_valid_vbt(vbt, vbt_size)) {
1049 DRM_DEBUG_KMS("Found valid VBT in ACPI OpRegion (Mailbox #4)\n");
1050 opregion->vbt = vbt;
1051 opregion->vbt_size = vbt_size;
1052 } else {
1053 DRM_DEBUG_KMS("Invalid VBT in ACPI OpRegion (Mailbox #4)\n");
1054 }
1055
1056 out:
1057 return 0;
1058
1059 err_out:
1060 memunmap(base);
1061 return err;
1062 }
1063
intel_use_opregion_panel_type_callback(const struct dmi_system_id * id)1064 static int intel_use_opregion_panel_type_callback(const struct dmi_system_id *id)
1065 {
1066 DRM_INFO("Using panel type from OpRegion on %s\n", id->ident);
1067 return 1;
1068 }
1069
1070 static const struct dmi_system_id intel_use_opregion_panel_type[] = {
1071 {
1072 .callback = intel_use_opregion_panel_type_callback,
1073 .ident = "Conrac GmbH IX45GM2",
1074 .matches = {DMI_MATCH(DMI_SYS_VENDOR, "Conrac GmbH"),
1075 DMI_MATCH(DMI_PRODUCT_NAME, "IX45GM2"),
1076 },
1077 },
1078 { }
1079 };
1080
1081 int
intel_opregion_get_panel_type(struct drm_i915_private * dev_priv)1082 intel_opregion_get_panel_type(struct drm_i915_private *dev_priv)
1083 {
1084 u32 panel_details;
1085 int ret;
1086
1087 ret = swsci(dev_priv, SWSCI_GBDA_PANEL_DETAILS, 0x0, &panel_details);
1088 if (ret) {
1089 DRM_DEBUG_KMS("Failed to get panel details from OpRegion (%d)\n",
1090 ret);
1091 return ret;
1092 }
1093
1094 ret = (panel_details >> 8) & 0xff;
1095 if (ret > 0x10) {
1096 DRM_DEBUG_KMS("Invalid OpRegion panel type 0x%x\n", ret);
1097 return -EINVAL;
1098 }
1099
1100 /* fall back to VBT panel type? */
1101 if (ret == 0x0) {
1102 DRM_DEBUG_KMS("No panel type in OpRegion\n");
1103 return -ENODEV;
1104 }
1105
1106 /*
1107 * So far we know that some machined must use it, others must not use it.
1108 * There doesn't seem to be any way to determine which way to go, except
1109 * via a quirk list :(
1110 */
1111 if (!dmi_check_system(intel_use_opregion_panel_type)) {
1112 DRM_DEBUG_KMS("Ignoring OpRegion panel type (%d)\n", ret - 1);
1113 return -ENODEV;
1114 }
1115
1116 return ret - 1;
1117 }
1118
