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 #include "i915_drv.h"
36 #include "intel_drv.h"
37
38 #include <contrib/dev/acpica/source/include/acpi.h>
39 #include <contrib/dev/acpica/source/include/accommon.h>
40 #include <dev/acpica/acpivar.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 (1<<0)
53 #define MBOX_SWSCI (1<<1)
54 #define MBOX_ASLE (1<<2)
55 #define MBOX_ASLE_EXT (1<<4)
56
57 struct opregion_header {
58 u8 signature[16];
59 u32 size;
60 u32 opregion_ver;
61 u8 bios_ver[32];
62 u8 vbios_ver[16];
63 u8 driver_ver[16];
64 u32 mboxes;
65 u32 driver_model;
66 u32 pcon;
67 u8 dver[32];
68 u8 rsvd[124];
69 } __packed;
70
71 /* OpRegion mailbox #1: public ACPI methods */
72 struct opregion_acpi {
73 u32 drdy; /* driver readiness */
74 u32 csts; /* notification status */
75 u32 cevt; /* current event */
76 u8 rsvd1[20];
77 u32 didl[8]; /* supported display devices ID list */
78 u32 cpdl[8]; /* currently presented display list */
79 u32 cadl[8]; /* currently active display list */
80 u32 nadl[8]; /* next active devices list */
81 u32 aslp; /* ASL sleep time-out */
82 u32 tidx; /* toggle table index */
83 u32 chpd; /* current hotplug enable indicator */
84 u32 clid; /* current lid state*/
85 u32 cdck; /* current docking state */
86 u32 sxsw; /* Sx state resume */
87 u32 evts; /* ASL supported events */
88 u32 cnot; /* current OS notification */
89 u32 nrdy; /* driver status */
90 u32 did2[7]; /* extended supported display devices ID list */
91 u32 cpd2[7]; /* extended attached display devices list */
92 u8 rsvd2[4];
93 } __packed;
94
95 /* OpRegion mailbox #2: SWSCI */
96 struct opregion_swsci {
97 u32 scic; /* SWSCI command|status|data */
98 u32 parm; /* command parameters */
99 u32 dslp; /* driver sleep time-out */
100 u8 rsvd[244];
101 } __packed;
102
103 /* OpRegion mailbox #3: ASLE */
104 struct opregion_asle {
105 u32 ardy; /* driver readiness */
106 u32 aslc; /* ASLE interrupt command */
107 u32 tche; /* technology enabled indicator */
108 u32 alsi; /* current ALS illuminance reading */
109 u32 bclp; /* backlight brightness to set */
110 u32 pfit; /* panel fitting state */
111 u32 cblv; /* current brightness level */
112 u16 bclm[20]; /* backlight level duty cycle mapping table */
113 u32 cpfm; /* current panel fitting mode */
114 u32 epfm; /* enabled panel fitting modes */
115 u8 plut[74]; /* panel LUT and identifier */
116 u32 pfmb; /* PWM freq and min brightness */
117 u32 cddv; /* color correction default values */
118 u32 pcft; /* power conservation features */
119 u32 srot; /* supported rotation angles */
120 u32 iuer; /* IUER events */
121 u64 fdss;
122 u32 fdsp;
123 u32 stat;
124 u64 rvda; /* Physical address of raw vbt data */
125 u32 rvds; /* Size of raw vbt data */
126 u8 rsvd[58];
127 } __packed;
128
129 /* OpRegion mailbox #5: ASLE ext */
130 struct opregion_asle_ext {
131 u32 phed; /* Panel Header */
132 u8 bddc[256]; /* Panel EDID */
133 u8 rsvd[764];
134 } __packed;
135
136 /* Driver readiness indicator */
137 #define ASLE_ARDY_READY (1 << 0)
138 #define ASLE_ARDY_NOT_READY (0 << 0)
139
140 /* ASLE Interrupt Command (ASLC) bits */
141 #define ASLC_SET_ALS_ILLUM (1 << 0)
142 #define ASLC_SET_BACKLIGHT (1 << 1)
143 #define ASLC_SET_PFIT (1 << 2)
144 #define ASLC_SET_PWM_FREQ (1 << 3)
145 #define ASLC_SUPPORTED_ROTATION_ANGLES (1 << 4)
146 #define ASLC_BUTTON_ARRAY (1 << 5)
147 #define ASLC_CONVERTIBLE_INDICATOR (1 << 6)
148 #define ASLC_DOCKING_INDICATOR (1 << 7)
149 #define ASLC_ISCT_STATE_CHANGE (1 << 8)
150 #define ASLC_REQ_MSK 0x1ff
151 /* response bits */
152 #define ASLC_ALS_ILLUM_FAILED (1 << 10)
153 #define ASLC_BACKLIGHT_FAILED (1 << 12)
154 #define ASLC_PFIT_FAILED (1 << 14)
155 #define ASLC_PWM_FREQ_FAILED (1 << 16)
156 #define ASLC_ROTATION_ANGLES_FAILED (1 << 18)
157 #define ASLC_BUTTON_ARRAY_FAILED (1 << 20)
158 #define ASLC_CONVERTIBLE_FAILED (1 << 22)
159 #define ASLC_DOCKING_FAILED (1 << 24)
160 #define ASLC_ISCT_STATE_FAILED (1 << 26)
161
162 /* Technology enabled indicator */
163 #define ASLE_TCHE_ALS_EN (1 << 0)
164 #define ASLE_TCHE_BLC_EN (1 << 1)
165 #define ASLE_TCHE_PFIT_EN (1 << 2)
166 #define ASLE_TCHE_PFMB_EN (1 << 3)
167
168 /* ASLE backlight brightness to set */
169 #define ASLE_BCLP_VALID (1<<31)
170 #define ASLE_BCLP_MSK (~(1<<31))
171
172 /* ASLE panel fitting request */
173 #define ASLE_PFIT_VALID (1<<31)
174 #define ASLE_PFIT_CENTER (1<<0)
175 #define ASLE_PFIT_STRETCH_TEXT (1<<1)
176 #define ASLE_PFIT_STRETCH_GFX (1<<2)
177
178 /* PWM frequency and minimum brightness */
179 #define ASLE_PFMB_BRIGHTNESS_MASK (0xff)
180 #define ASLE_PFMB_BRIGHTNESS_VALID (1<<8)
181 #define ASLE_PFMB_PWM_MASK (0x7ffffe00)
182 #define ASLE_PFMB_PWM_VALID (1<<31)
183
184 #define ASLE_CBLV_VALID (1<<31)
185
186 /* IUER */
187 #define ASLE_IUER_DOCKING (1 << 7)
188 #define ASLE_IUER_CONVERTIBLE (1 << 6)
189 #define ASLE_IUER_ROTATION_LOCK_BTN (1 << 4)
190 #define ASLE_IUER_VOLUME_DOWN_BTN (1 << 3)
191 #define ASLE_IUER_VOLUME_UP_BTN (1 << 2)
192 #define ASLE_IUER_WINDOWS_BTN (1 << 1)
193 #define ASLE_IUER_POWER_BTN (1 << 0)
194
195 /* Software System Control Interrupt (SWSCI) */
196 #define SWSCI_SCIC_INDICATOR (1 << 0)
197 #define SWSCI_SCIC_MAIN_FUNCTION_SHIFT 1
198 #define SWSCI_SCIC_MAIN_FUNCTION_MASK (0xf << 1)
199 #define SWSCI_SCIC_SUB_FUNCTION_SHIFT 8
200 #define SWSCI_SCIC_SUB_FUNCTION_MASK (0xff << 8)
201 #define SWSCI_SCIC_EXIT_PARAMETER_SHIFT 8
202 #define SWSCI_SCIC_EXIT_PARAMETER_MASK (0xff << 8)
203 #define SWSCI_SCIC_EXIT_STATUS_SHIFT 5
204 #define SWSCI_SCIC_EXIT_STATUS_MASK (7 << 5)
205 #define SWSCI_SCIC_EXIT_STATUS_SUCCESS 1
206
207 #define SWSCI_FUNCTION_CODE(main, sub) \
208 ((main) << SWSCI_SCIC_MAIN_FUNCTION_SHIFT | \
209 (sub) << SWSCI_SCIC_SUB_FUNCTION_SHIFT)
210
211 /* SWSCI: Get BIOS Data (GBDA) */
212 #define SWSCI_GBDA 4
213 #define SWSCI_GBDA_SUPPORTED_CALLS SWSCI_FUNCTION_CODE(SWSCI_GBDA, 0)
214 #define SWSCI_GBDA_REQUESTED_CALLBACKS SWSCI_FUNCTION_CODE(SWSCI_GBDA, 1)
215 #define SWSCI_GBDA_BOOT_DISPLAY_PREF SWSCI_FUNCTION_CODE(SWSCI_GBDA, 4)
216 #define SWSCI_GBDA_PANEL_DETAILS SWSCI_FUNCTION_CODE(SWSCI_GBDA, 5)
217 #define SWSCI_GBDA_TV_STANDARD SWSCI_FUNCTION_CODE(SWSCI_GBDA, 6)
218 #define SWSCI_GBDA_INTERNAL_GRAPHICS SWSCI_FUNCTION_CODE(SWSCI_GBDA, 7)
219 #define SWSCI_GBDA_SPREAD_SPECTRUM SWSCI_FUNCTION_CODE(SWSCI_GBDA, 10)
220
221 /* SWSCI: System BIOS Callbacks (SBCB) */
222 #define SWSCI_SBCB 6
223 #define SWSCI_SBCB_SUPPORTED_CALLBACKS SWSCI_FUNCTION_CODE(SWSCI_SBCB, 0)
224 #define SWSCI_SBCB_INIT_COMPLETION SWSCI_FUNCTION_CODE(SWSCI_SBCB, 1)
225 #define SWSCI_SBCB_PRE_HIRES_SET_MODE SWSCI_FUNCTION_CODE(SWSCI_SBCB, 3)
226 #define SWSCI_SBCB_POST_HIRES_SET_MODE SWSCI_FUNCTION_CODE(SWSCI_SBCB, 4)
227 #define SWSCI_SBCB_DISPLAY_SWITCH SWSCI_FUNCTION_CODE(SWSCI_SBCB, 5)
228 #define SWSCI_SBCB_SET_TV_FORMAT SWSCI_FUNCTION_CODE(SWSCI_SBCB, 6)
229 #define SWSCI_SBCB_ADAPTER_POWER_STATE SWSCI_FUNCTION_CODE(SWSCI_SBCB, 7)
230 #define SWSCI_SBCB_DISPLAY_POWER_STATE SWSCI_FUNCTION_CODE(SWSCI_SBCB, 8)
231 #define SWSCI_SBCB_SET_BOOT_DISPLAY SWSCI_FUNCTION_CODE(SWSCI_SBCB, 9)
232 #define SWSCI_SBCB_SET_PANEL_DETAILS SWSCI_FUNCTION_CODE(SWSCI_SBCB, 10)
233 #define SWSCI_SBCB_SET_INTERNAL_GFX SWSCI_FUNCTION_CODE(SWSCI_SBCB, 11)
234 #define SWSCI_SBCB_POST_HIRES_TO_DOS_FS SWSCI_FUNCTION_CODE(SWSCI_SBCB, 16)
235 #define SWSCI_SBCB_SUSPEND_RESUME SWSCI_FUNCTION_CODE(SWSCI_SBCB, 17)
236 #define SWSCI_SBCB_SET_SPREAD_SPECTRUM SWSCI_FUNCTION_CODE(SWSCI_SBCB, 18)
237 #define SWSCI_SBCB_POST_VBE_PM SWSCI_FUNCTION_CODE(SWSCI_SBCB, 19)
238 #define SWSCI_SBCB_ENABLE_DISABLE_AUDIO SWSCI_FUNCTION_CODE(SWSCI_SBCB, 21)
239
240 /*
241 * ACPI Specification, Revision 5.0, Appendix B.3.2 _DOD (Enumerate All Devices
242 * Attached to the Display Adapter).
243 */
244 #define ACPI_DISPLAY_INDEX_SHIFT 0
245 #define ACPI_DISPLAY_INDEX_MASK (0xf << 0)
246 #define ACPI_DISPLAY_PORT_ATTACHMENT_SHIFT 4
247 #define ACPI_DISPLAY_PORT_ATTACHMENT_MASK (0xf << 4)
248 #define ACPI_DISPLAY_TYPE_SHIFT 8
249 #define ACPI_DISPLAY_TYPE_MASK (0xf << 8)
250 #define ACPI_DISPLAY_TYPE_OTHER (0 << 8)
251 #define ACPI_DISPLAY_TYPE_VGA (1 << 8)
252 #define ACPI_DISPLAY_TYPE_TV (2 << 8)
253 #define ACPI_DISPLAY_TYPE_EXTERNAL_DIGITAL (3 << 8)
254 #define ACPI_DISPLAY_TYPE_INTERNAL_DIGITAL (4 << 8)
255 #define ACPI_VENDOR_SPECIFIC_SHIFT 12
256 #define ACPI_VENDOR_SPECIFIC_MASK (0xf << 12)
257 #define ACPI_BIOS_CAN_DETECT (1 << 16)
258 #define ACPI_DEPENDS_ON_VGA (1 << 17)
259 #define ACPI_PIPE_ID_SHIFT 18
260 #define ACPI_PIPE_ID_MASK (7 << 18)
261 #define ACPI_DEVICE_ID_SCHEME (1 << 31)
262
263 #define MAX_DSLP 1500
264
swsci(struct drm_i915_private * dev_priv,u32 function,u32 parm,u32 * parm_out)265 static int swsci(struct drm_i915_private *dev_priv,
266 u32 function, u32 parm, u32 *parm_out)
267 {
268 struct opregion_swsci *swsci = dev_priv->opregion.swsci;
269 struct pci_dev *pdev = dev_priv->drm.pdev;
270 u32 main_function, sub_function, scic;
271 u16 swsci_val;
272 u32 dslp;
273
274 if (!swsci)
275 return -ENODEV;
276
277 main_function = (function & SWSCI_SCIC_MAIN_FUNCTION_MASK) >>
278 SWSCI_SCIC_MAIN_FUNCTION_SHIFT;
279 sub_function = (function & SWSCI_SCIC_SUB_FUNCTION_MASK) >>
280 SWSCI_SCIC_SUB_FUNCTION_SHIFT;
281
282 /* Check if we can call the function. See swsci_setup for details. */
283 if (main_function == SWSCI_SBCB) {
284 if ((dev_priv->opregion.swsci_sbcb_sub_functions &
285 (1 << sub_function)) == 0)
286 return -EINVAL;
287 } else if (main_function == SWSCI_GBDA) {
288 if ((dev_priv->opregion.swsci_gbda_sub_functions &
289 (1 << sub_function)) == 0)
290 return -EINVAL;
291 }
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_DEBUG_DRIVER("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_DEBUG_DRIVER("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_DEBUG_DRIVER("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
367 /* don't care about old stuff for now */
368 if (!HAS_DDI(dev_priv))
369 return 0;
370
371 if (intel_encoder->type == INTEL_OUTPUT_DSI)
372 port = 0;
373 else
374 port = intel_ddi_get_encoder_port(intel_encoder);
375
376 if (port == PORT_E) {
377 port = 0;
378 } else {
379 parm |= 1 << port;
380 port++;
381 }
382
383 if (!enable)
384 parm |= 4 << 8;
385
386 switch (intel_encoder->type) {
387 case INTEL_OUTPUT_ANALOG:
388 type = DISPLAY_TYPE_CRT;
389 break;
390 case INTEL_OUTPUT_UNKNOWN:
391 case INTEL_OUTPUT_DP:
392 case INTEL_OUTPUT_HDMI:
393 case INTEL_OUTPUT_DP_MST:
394 type = DISPLAY_TYPE_EXTERNAL_FLAT_PANEL;
395 break;
396 case INTEL_OUTPUT_EDP:
397 case INTEL_OUTPUT_DSI:
398 type = DISPLAY_TYPE_INTERNAL_FLAT_PANEL;
399 break;
400 default:
401 WARN_ONCE(1, "unsupported intel_encoder type %d\n",
402 intel_encoder->type);
403 return -EINVAL;
404 }
405
406 parm |= type << (16 + port * 3);
407
408 return swsci(dev_priv, SWSCI_SBCB_DISPLAY_POWER_STATE, parm, NULL);
409 }
410
411 static const struct {
412 pci_power_t pci_power_state;
413 u32 parm;
414 } power_state_map[] = {
415 { PCI_D0, 0x00 },
416 { PCI_D1, 0x01 },
417 { PCI_D2, 0x02 },
418 { PCI_D3hot, 0x04 },
419 { PCI_D3cold, 0x04 },
420 };
421
intel_opregion_notify_adapter(struct drm_i915_private * dev_priv,pci_power_t state)422 int intel_opregion_notify_adapter(struct drm_i915_private *dev_priv,
423 pci_power_t state)
424 {
425 int i;
426
427 if (!HAS_DDI(dev_priv))
428 return 0;
429
430 for (i = 0; i < ARRAY_SIZE(power_state_map); i++) {
431 if (state == power_state_map[i].pci_power_state)
432 return swsci(dev_priv, SWSCI_SBCB_ADAPTER_POWER_STATE,
433 power_state_map[i].parm, NULL);
434 }
435
436 return -EINVAL;
437 }
438
asle_set_backlight(struct drm_i915_private * dev_priv,u32 bclp)439 static u32 asle_set_backlight(struct drm_i915_private *dev_priv, u32 bclp)
440 {
441 struct intel_connector *connector;
442 struct drm_connector_list_iter conn_iter;
443 struct opregion_asle *asle = dev_priv->opregion.asle;
444 struct drm_device *dev = &dev_priv->drm;
445
446 DRM_DEBUG_DRIVER("bclp = 0x%08x\n", bclp);
447
448 #ifndef __DragonFly__
449 if (acpi_video_get_backlight_type() == acpi_backlight_native) {
450 DRM_DEBUG_KMS("opregion backlight request ignored\n");
451 return 0;
452 }
453 #endif
454
455 if (!(bclp & ASLE_BCLP_VALID))
456 return ASLC_BACKLIGHT_FAILED;
457
458 bclp &= ASLE_BCLP_MSK;
459 if (bclp > 255)
460 return ASLC_BACKLIGHT_FAILED;
461
462 drm_modeset_lock(&dev->mode_config.connection_mutex, NULL);
463
464 /*
465 * Update backlight on all connectors that support backlight (usually
466 * only one).
467 */
468 DRM_DEBUG_KMS("updating opregion backlight %d/255\n", bclp);
469 drm_connector_list_iter_begin(dev, &conn_iter);
470 for_each_intel_connector_iter(connector, &conn_iter)
471 intel_panel_set_backlight_acpi(connector->base.state, bclp, 255);
472 drm_connector_list_iter_end(&conn_iter);
473 asle->cblv = DIV_ROUND_UP(bclp * 100, 255) | ASLE_CBLV_VALID;
474
475 drm_modeset_unlock(&dev->mode_config.connection_mutex);
476
477
478 return 0;
479 }
480
asle_set_als_illum(struct drm_i915_private * dev_priv,u32 alsi)481 static u32 asle_set_als_illum(struct drm_i915_private *dev_priv, u32 alsi)
482 {
483 /* alsi is the current ALS reading in lux. 0 indicates below sensor
484 range, 0xffff indicates above sensor range. 1-0xfffe are valid */
485 DRM_DEBUG_DRIVER("Illum is not supported\n");
486 return ASLC_ALS_ILLUM_FAILED;
487 }
488
asle_set_pwm_freq(struct drm_i915_private * dev_priv,u32 pfmb)489 static u32 asle_set_pwm_freq(struct drm_i915_private *dev_priv, u32 pfmb)
490 {
491 DRM_DEBUG_DRIVER("PWM freq is not supported\n");
492 return ASLC_PWM_FREQ_FAILED;
493 }
494
asle_set_pfit(struct drm_i915_private * dev_priv,u32 pfit)495 static u32 asle_set_pfit(struct drm_i915_private *dev_priv, u32 pfit)
496 {
497 /* Panel fitting is currently controlled by the X code, so this is a
498 noop until modesetting support works fully */
499 DRM_DEBUG_DRIVER("Pfit is not supported\n");
500 return ASLC_PFIT_FAILED;
501 }
502
asle_set_supported_rotation_angles(struct drm_i915_private * dev_priv,u32 srot)503 static u32 asle_set_supported_rotation_angles(struct drm_i915_private *dev_priv, u32 srot)
504 {
505 DRM_DEBUG_DRIVER("SROT is not supported\n");
506 return ASLC_ROTATION_ANGLES_FAILED;
507 }
508
asle_set_button_array(struct drm_i915_private * dev_priv,u32 iuer)509 static u32 asle_set_button_array(struct drm_i915_private *dev_priv, u32 iuer)
510 {
511 if (!iuer)
512 DRM_DEBUG_DRIVER("Button array event is not supported (nothing)\n");
513 if (iuer & ASLE_IUER_ROTATION_LOCK_BTN)
514 DRM_DEBUG_DRIVER("Button array event is not supported (rotation lock)\n");
515 if (iuer & ASLE_IUER_VOLUME_DOWN_BTN)
516 DRM_DEBUG_DRIVER("Button array event is not supported (volume down)\n");
517 if (iuer & ASLE_IUER_VOLUME_UP_BTN)
518 DRM_DEBUG_DRIVER("Button array event is not supported (volume up)\n");
519 if (iuer & ASLE_IUER_WINDOWS_BTN)
520 DRM_DEBUG_DRIVER("Button array event is not supported (windows)\n");
521 if (iuer & ASLE_IUER_POWER_BTN)
522 DRM_DEBUG_DRIVER("Button array event is not supported (power)\n");
523
524 return ASLC_BUTTON_ARRAY_FAILED;
525 }
526
asle_set_convertible(struct drm_i915_private * dev_priv,u32 iuer)527 static u32 asle_set_convertible(struct drm_i915_private *dev_priv, u32 iuer)
528 {
529 if (iuer & ASLE_IUER_CONVERTIBLE)
530 DRM_DEBUG_DRIVER("Convertible is not supported (clamshell)\n");
531 else
532 DRM_DEBUG_DRIVER("Convertible is not supported (slate)\n");
533
534 return ASLC_CONVERTIBLE_FAILED;
535 }
536
asle_set_docking(struct drm_i915_private * dev_priv,u32 iuer)537 static u32 asle_set_docking(struct drm_i915_private *dev_priv, u32 iuer)
538 {
539 if (iuer & ASLE_IUER_DOCKING)
540 DRM_DEBUG_DRIVER("Docking is not supported (docked)\n");
541 else
542 DRM_DEBUG_DRIVER("Docking is not supported (undocked)\n");
543
544 return ASLC_DOCKING_FAILED;
545 }
546
asle_isct_state(struct drm_i915_private * dev_priv)547 static u32 asle_isct_state(struct drm_i915_private *dev_priv)
548 {
549 DRM_DEBUG_DRIVER("ISCT is not supported\n");
550 return ASLC_ISCT_STATE_FAILED;
551 }
552
asle_work(struct work_struct * work)553 static void asle_work(struct work_struct *work)
554 {
555 struct intel_opregion *opregion =
556 container_of(work, struct intel_opregion, asle_work);
557 struct drm_i915_private *dev_priv =
558 container_of(opregion, struct drm_i915_private, opregion);
559 struct opregion_asle *asle = dev_priv->opregion.asle;
560 u32 aslc_stat = 0;
561 u32 aslc_req;
562
563 if (!asle)
564 return;
565
566 aslc_req = asle->aslc;
567
568 if (!(aslc_req & ASLC_REQ_MSK)) {
569 DRM_DEBUG_DRIVER("No request on ASLC interrupt 0x%08x\n",
570 aslc_req);
571 return;
572 }
573
574 if (aslc_req & ASLC_SET_ALS_ILLUM)
575 aslc_stat |= asle_set_als_illum(dev_priv, asle->alsi);
576
577 if (aslc_req & ASLC_SET_BACKLIGHT)
578 aslc_stat |= asle_set_backlight(dev_priv, asle->bclp);
579
580 if (aslc_req & ASLC_SET_PFIT)
581 aslc_stat |= asle_set_pfit(dev_priv, asle->pfit);
582
583 if (aslc_req & ASLC_SET_PWM_FREQ)
584 aslc_stat |= asle_set_pwm_freq(dev_priv, asle->pfmb);
585
586 if (aslc_req & ASLC_SUPPORTED_ROTATION_ANGLES)
587 aslc_stat |= asle_set_supported_rotation_angles(dev_priv,
588 asle->srot);
589
590 if (aslc_req & ASLC_BUTTON_ARRAY)
591 aslc_stat |= asle_set_button_array(dev_priv, asle->iuer);
592
593 if (aslc_req & ASLC_CONVERTIBLE_INDICATOR)
594 aslc_stat |= asle_set_convertible(dev_priv, asle->iuer);
595
596 if (aslc_req & ASLC_DOCKING_INDICATOR)
597 aslc_stat |= asle_set_docking(dev_priv, asle->iuer);
598
599 if (aslc_req & ASLC_ISCT_STATE_CHANGE)
600 aslc_stat |= asle_isct_state(dev_priv);
601
602 asle->aslc = aslc_stat;
603 }
604
intel_opregion_asle_intr(struct drm_i915_private * dev_priv)605 void intel_opregion_asle_intr(struct drm_i915_private *dev_priv)
606 {
607 if (dev_priv->opregion.asle)
608 schedule_work(&dev_priv->opregion.asle_work);
609 }
610
611 #define ACPI_EV_DISPLAY_SWITCH (1<<0)
612 #define ACPI_EV_LID (1<<1)
613 #define ACPI_EV_DOCK (1<<2)
614
615 static struct intel_opregion *system_opregion;
616
617 #if 0
618 static int intel_opregion_video_event(struct notifier_block *nb,
619 unsigned long val, void *data)
620 {
621 /* The only video events relevant to opregion are 0x80. These indicate
622 either a docking event, lid switch or display switch request. In
623 Linux, these are handled by the dock, button and video drivers.
624 */
625
626 struct acpi_bus_event *event = data;
627 struct opregion_acpi *acpi;
628 int ret = NOTIFY_OK;
629
630 if (strcmp(event->device_class, ACPI_VIDEO_CLASS) != 0)
631 return NOTIFY_DONE;
632
633 if (!system_opregion)
634 return NOTIFY_DONE;
635
636 acpi = system_opregion->acpi;
637
638 if (event->type == 0x80 && ((acpi->cevt & 1) == 0))
639 ret = NOTIFY_BAD;
640
641 acpi->csts = 0;
642
643 return ret;
644 }
645
646 static struct notifier_block intel_opregion_notifier = {
647 .notifier_call = intel_opregion_video_event,
648 };
649 #endif
650
651 /*
652 * Initialise the DIDL field in opregion. This passes a list of devices to
653 * the firmware. Values are defined by section B.4.2 of the ACPI specification
654 * (version 3)
655 */
656
set_did(struct intel_opregion * opregion,int i,u32 val)657 static void set_did(struct intel_opregion *opregion, int i, u32 val)
658 {
659 if (i < ARRAY_SIZE(opregion->acpi->didl)) {
660 opregion->acpi->didl[i] = val;
661 } else {
662 i -= ARRAY_SIZE(opregion->acpi->didl);
663
664 if (WARN_ON(i >= ARRAY_SIZE(opregion->acpi->did2)))
665 return;
666
667 opregion->acpi->did2[i] = val;
668 }
669 }
670
acpi_display_type(struct intel_connector * connector)671 static u32 acpi_display_type(struct intel_connector *connector)
672 {
673 u32 display_type;
674
675 switch (connector->base.connector_type) {
676 case DRM_MODE_CONNECTOR_VGA:
677 case DRM_MODE_CONNECTOR_DVIA:
678 display_type = ACPI_DISPLAY_TYPE_VGA;
679 break;
680 case DRM_MODE_CONNECTOR_Composite:
681 case DRM_MODE_CONNECTOR_SVIDEO:
682 case DRM_MODE_CONNECTOR_Component:
683 case DRM_MODE_CONNECTOR_9PinDIN:
684 case DRM_MODE_CONNECTOR_TV:
685 display_type = ACPI_DISPLAY_TYPE_TV;
686 break;
687 case DRM_MODE_CONNECTOR_DVII:
688 case DRM_MODE_CONNECTOR_DVID:
689 case DRM_MODE_CONNECTOR_DisplayPort:
690 case DRM_MODE_CONNECTOR_HDMIA:
691 case DRM_MODE_CONNECTOR_HDMIB:
692 display_type = ACPI_DISPLAY_TYPE_EXTERNAL_DIGITAL;
693 break;
694 case DRM_MODE_CONNECTOR_LVDS:
695 case DRM_MODE_CONNECTOR_eDP:
696 case DRM_MODE_CONNECTOR_DSI:
697 display_type = ACPI_DISPLAY_TYPE_INTERNAL_DIGITAL;
698 break;
699 case DRM_MODE_CONNECTOR_Unknown:
700 case DRM_MODE_CONNECTOR_VIRTUAL:
701 display_type = ACPI_DISPLAY_TYPE_OTHER;
702 break;
703 default:
704 MISSING_CASE(connector->base.connector_type);
705 display_type = ACPI_DISPLAY_TYPE_OTHER;
706 break;
707 }
708
709 return display_type;
710 }
711
intel_didl_outputs(struct drm_i915_private * dev_priv)712 static void intel_didl_outputs(struct drm_i915_private *dev_priv)
713 {
714 struct intel_opregion *opregion = &dev_priv->opregion;
715 struct intel_connector *connector;
716 struct drm_connector_list_iter conn_iter;
717 int i = 0, max_outputs;
718 int display_index[16] = {};
719
720 /*
721 * In theory, did2, the extended didl, gets added at opregion version
722 * 3.0. In practice, however, we're supposed to set it for earlier
723 * versions as well, since a BIOS that doesn't understand did2 should
724 * not look at it anyway. Use a variable so we can tweak this if a need
725 * arises later.
726 */
727 max_outputs = ARRAY_SIZE(opregion->acpi->didl) +
728 ARRAY_SIZE(opregion->acpi->did2);
729
730 drm_connector_list_iter_begin(&dev_priv->drm, &conn_iter);
731 for_each_intel_connector_iter(connector, &conn_iter) {
732 u32 device_id, type;
733
734 device_id = acpi_display_type(connector);
735
736 /* Use display type specific display index. */
737 type = (device_id & ACPI_DISPLAY_TYPE_MASK)
738 >> ACPI_DISPLAY_TYPE_SHIFT;
739 device_id |= display_index[type]++ << ACPI_DISPLAY_INDEX_SHIFT;
740
741 connector->acpi_device_id = device_id;
742 if (i < max_outputs)
743 set_did(opregion, i, device_id);
744 i++;
745 }
746 drm_connector_list_iter_end(&conn_iter);
747
748 DRM_DEBUG_KMS("%d outputs detected\n", i);
749
750 if (i > max_outputs)
751 DRM_ERROR("More than %d outputs in connector list\n",
752 max_outputs);
753
754 /* If fewer than max outputs, the list must be null terminated */
755 if (i < max_outputs)
756 set_did(opregion, i, 0);
757 }
758
intel_setup_cadls(struct drm_i915_private * dev_priv)759 static void intel_setup_cadls(struct drm_i915_private *dev_priv)
760 {
761 struct intel_opregion *opregion = &dev_priv->opregion;
762 struct intel_connector *connector;
763 struct drm_connector_list_iter conn_iter;
764 int i = 0;
765
766 /*
767 * Initialize the CADL field from the connector device ids. This is
768 * essentially the same as copying from the DIDL. Technically, this is
769 * not always correct as display outputs may exist, but not active. This
770 * initialization is necessary for some Clevo laptops that check this
771 * field before processing the brightness and display switching hotkeys.
772 *
773 * Note that internal panels should be at the front of the connector
774 * list already, ensuring they're not left out.
775 */
776 drm_connector_list_iter_begin(&dev_priv->drm, &conn_iter);
777 for_each_intel_connector_iter(connector, &conn_iter) {
778 if (i >= ARRAY_SIZE(opregion->acpi->cadl))
779 break;
780 opregion->acpi->cadl[i++] = connector->acpi_device_id;
781 }
782 drm_connector_list_iter_end(&conn_iter);
783
784 /* If fewer than 8 active devices, the list must be null terminated */
785 if (i < ARRAY_SIZE(opregion->acpi->cadl))
786 opregion->acpi->cadl[i] = 0;
787 }
788
intel_opregion_register(struct drm_i915_private * dev_priv)789 void intel_opregion_register(struct drm_i915_private *dev_priv)
790 {
791 struct intel_opregion *opregion = &dev_priv->opregion;
792
793 if (!opregion->header)
794 return;
795
796 if (opregion->acpi) {
797 intel_didl_outputs(dev_priv);
798 intel_setup_cadls(dev_priv);
799
800 /* Notify BIOS we are ready to handle ACPI video ext notifs.
801 * Right now, all the events are handled by the ACPI video module.
802 * We don't actually need to do anything with them. */
803 opregion->acpi->csts = 0;
804 opregion->acpi->drdy = 1;
805
806 system_opregion = opregion;
807 }
808
809 if (opregion->asle) {
810 opregion->asle->tche = ASLE_TCHE_BLC_EN;
811 opregion->asle->ardy = ASLE_ARDY_READY;
812 }
813 }
814
intel_opregion_unregister(struct drm_i915_private * dev_priv)815 void intel_opregion_unregister(struct drm_i915_private *dev_priv)
816 {
817 struct intel_opregion *opregion = &dev_priv->opregion;
818
819 if (!opregion->header)
820 return;
821
822 if (opregion->asle)
823 opregion->asle->ardy = ASLE_ARDY_NOT_READY;
824
825 cancel_work_sync(&dev_priv->opregion.asle_work);
826
827 if (opregion->acpi) {
828 opregion->acpi->drdy = 0;
829
830 system_opregion = NULL;
831 }
832
833 /* just clear all opregion memory pointers now */
834 iounmap(opregion->header);
835 if (opregion->rvda) {
836 iounmap(opregion->rvda);
837 opregion->rvda = NULL;
838 }
839 if (opregion->vbt_firmware) {
840 kfree(opregion->vbt_firmware);
841 opregion->vbt_firmware = NULL;
842 }
843 opregion->header = NULL;
844 opregion->acpi = NULL;
845 opregion->swsci = NULL;
846 opregion->asle = NULL;
847 opregion->vbt = NULL;
848 opregion->lid_state = NULL;
849 }
850
swsci_setup(struct drm_i915_private * dev_priv)851 static void swsci_setup(struct drm_i915_private *dev_priv)
852 {
853 struct intel_opregion *opregion = &dev_priv->opregion;
854 bool requested_callbacks = false;
855 u32 tmp;
856
857 /* Sub-function code 0 is okay, let's allow them. */
858 opregion->swsci_gbda_sub_functions = 1;
859 opregion->swsci_sbcb_sub_functions = 1;
860
861 /* We use GBDA to ask for supported GBDA calls. */
862 if (swsci(dev_priv, SWSCI_GBDA_SUPPORTED_CALLS, 0, &tmp) == 0) {
863 /* make the bits match the sub-function codes */
864 tmp <<= 1;
865 opregion->swsci_gbda_sub_functions |= tmp;
866 }
867
868 /*
869 * We also use GBDA to ask for _requested_ SBCB callbacks. The driver
870 * must not call interfaces that are not specifically requested by the
871 * bios.
872 */
873 if (swsci(dev_priv, SWSCI_GBDA_REQUESTED_CALLBACKS, 0, &tmp) == 0) {
874 /* here, the bits already match sub-function codes */
875 opregion->swsci_sbcb_sub_functions |= tmp;
876 requested_callbacks = true;
877 }
878
879 /*
880 * But we use SBCB to ask for _supported_ SBCB calls. This does not mean
881 * the callback is _requested_. But we still can't call interfaces that
882 * are not requested.
883 */
884 if (swsci(dev_priv, SWSCI_SBCB_SUPPORTED_CALLBACKS, 0, &tmp) == 0) {
885 /* make the bits match the sub-function codes */
886 u32 low = tmp & 0x7ff;
887 u32 high = tmp & ~0xfff; /* bit 11 is reserved */
888 tmp = (high << 4) | (low << 1) | 1;
889
890 /* best guess what to do with supported wrt requested */
891 if (requested_callbacks) {
892 u32 req = opregion->swsci_sbcb_sub_functions;
893 if ((req & tmp) != req)
894 DRM_DEBUG_DRIVER("SWSCI BIOS requested (%08x) SBCB callbacks that are not supported (%08x)\n", req, tmp);
895 /* XXX: for now, trust the requested callbacks */
896 /* opregion->swsci_sbcb_sub_functions &= tmp; */
897 } else {
898 opregion->swsci_sbcb_sub_functions |= tmp;
899 }
900 }
901
902 DRM_DEBUG_DRIVER("SWSCI GBDA callbacks %08x, SBCB callbacks %08x\n",
903 opregion->swsci_gbda_sub_functions,
904 opregion->swsci_sbcb_sub_functions);
905 }
906
intel_no_opregion_vbt_callback(const struct dmi_system_id * id)907 static int intel_no_opregion_vbt_callback(const struct dmi_system_id *id)
908 {
909 DRM_DEBUG_KMS("Falling back to manually reading VBT from "
910 "VBIOS ROM for %s\n", id->ident);
911 return 1;
912 }
913
914 static const struct dmi_system_id intel_no_opregion_vbt[] = {
915 {
916 .callback = intel_no_opregion_vbt_callback,
917 .ident = "ThinkCentre A57",
918 .matches = {
919 DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
920 DMI_MATCH(DMI_PRODUCT_NAME, "97027RG"),
921 },
922 },
923 { }
924 };
925
intel_load_vbt_firmware(struct drm_i915_private * dev_priv)926 static int intel_load_vbt_firmware(struct drm_i915_private *dev_priv)
927 {
928 struct intel_opregion *opregion = &dev_priv->opregion;
929 const struct firmware *fw = NULL;
930 const char *name = i915_modparams.vbt_firmware;
931 int ret;
932
933 if (!name || !*name)
934 return -ENOENT;
935
936 ret = request_firmware(&fw, name, &dev_priv->drm.pdev->dev);
937 if (ret) {
938 DRM_ERROR("Requesting VBT firmware \"%s\" failed (%d)\n",
939 name, ret);
940 return ret;
941 }
942
943 if (intel_bios_is_valid_vbt(fw->data, fw->datasize)) {
944 opregion->vbt_firmware = kmemdup(fw->data, fw->datasize, GFP_KERNEL);
945 if (opregion->vbt_firmware) {
946 DRM_DEBUG_KMS("Found valid VBT firmware \"%s\"\n", name);
947 opregion->vbt = opregion->vbt_firmware;
948 opregion->vbt_size = fw->datasize;
949 ret = 0;
950 } else {
951 ret = -ENOMEM;
952 }
953 } else {
954 DRM_DEBUG_KMS("Invalid VBT firmware \"%s\"\n", name);
955 ret = -EINVAL;
956 }
957
958 release_firmware(fw);
959
960 return ret;
961 }
962
intel_opregion_setup(struct drm_i915_private * dev_priv)963 int intel_opregion_setup(struct drm_i915_private *dev_priv)
964 {
965 struct intel_opregion *opregion = &dev_priv->opregion;
966 struct pci_dev *pdev = dev_priv->drm.pdev;
967 u32 asls, mboxes;
968 char buf[sizeof(OPREGION_SIGNATURE)];
969 int err = 0;
970 void *base;
971 const void *vbt;
972 u32 vbt_size;
973
974 BUILD_BUG_ON(sizeof(struct opregion_header) != 0x100);
975 BUILD_BUG_ON(sizeof(struct opregion_acpi) != 0x100);
976 BUILD_BUG_ON(sizeof(struct opregion_swsci) != 0x100);
977 BUILD_BUG_ON(sizeof(struct opregion_asle) != 0x100);
978 BUILD_BUG_ON(sizeof(struct opregion_asle_ext) != 0x400);
979
980 pci_read_config_dword(pdev, ASLS, &asls);
981 DRM_DEBUG_DRIVER("graphic opregion physical addr: 0x%x\n", asls);
982 if (asls == 0) {
983 DRM_DEBUG_DRIVER("ACPI OpRegion not supported!\n");
984 return -ENOTSUPP;
985 }
986
987 INIT_WORK(&opregion->asle_work, asle_work);
988
989 base = (void *)pmap_mapbios(asls, OPREGION_SIZE);
990 if (!base)
991 return -ENOMEM;
992
993 memcpy(buf, base, sizeof(buf));
994
995 if (memcmp(buf, OPREGION_SIGNATURE, 16)) {
996 DRM_DEBUG_DRIVER("opregion signature mismatch\n");
997 err = -EINVAL;
998 goto err_out;
999 }
1000 opregion->header = base;
1001 opregion->lid_state = base + ACPI_CLID;
1002
1003 mboxes = opregion->header->mboxes;
1004 if (mboxes & MBOX_ACPI) {
1005 DRM_DEBUG_DRIVER("Public ACPI methods supported\n");
1006 opregion->acpi = base + OPREGION_ACPI_OFFSET;
1007 }
1008
1009 if (mboxes & MBOX_SWSCI) {
1010 DRM_DEBUG_DRIVER("SWSCI supported\n");
1011 opregion->swsci = base + OPREGION_SWSCI_OFFSET;
1012 swsci_setup(dev_priv);
1013 }
1014
1015 if (mboxes & MBOX_ASLE) {
1016 DRM_DEBUG_DRIVER("ASLE supported\n");
1017 opregion->asle = base + OPREGION_ASLE_OFFSET;
1018
1019 opregion->asle->ardy = ASLE_ARDY_NOT_READY;
1020 }
1021
1022 if (mboxes & MBOX_ASLE_EXT)
1023 DRM_DEBUG_DRIVER("ASLE extension supported\n");
1024
1025 if (intel_load_vbt_firmware(dev_priv) == 0)
1026 goto out;
1027
1028 if (dmi_check_system(intel_no_opregion_vbt))
1029 goto out;
1030
1031 if (opregion->header->opregion_ver >= 2 && opregion->asle &&
1032 opregion->asle->rvda && opregion->asle->rvds) {
1033 opregion->rvda = pmap_mapbios(opregion->asle->rvda,
1034 opregion->asle->rvds);
1035 vbt = opregion->rvda;
1036 vbt_size = opregion->asle->rvds;
1037 if (intel_bios_is_valid_vbt(vbt, vbt_size)) {
1038 DRM_DEBUG_KMS("Found valid VBT in ACPI OpRegion (RVDA)\n");
1039 opregion->vbt = vbt;
1040 opregion->vbt_size = vbt_size;
1041 goto out;
1042 } else {
1043 DRM_DEBUG_KMS("Invalid VBT in ACPI OpRegion (RVDA)\n");
1044 }
1045 }
1046
1047 vbt = base + OPREGION_VBT_OFFSET;
1048 /*
1049 * The VBT specification says that if the ASLE ext mailbox is not used
1050 * its area is reserved, but on some CHT boards the VBT extends into the
1051 * ASLE ext area. Allow this even though it is against the spec, so we
1052 * do not end up rejecting the VBT on those boards (and end up not
1053 * finding the LCD panel because of this).
1054 */
1055 vbt_size = (mboxes & MBOX_ASLE_EXT) ?
1056 OPREGION_ASLE_EXT_OFFSET : OPREGION_SIZE;
1057 vbt_size -= OPREGION_VBT_OFFSET;
1058 if (intel_bios_is_valid_vbt(vbt, vbt_size)) {
1059 DRM_DEBUG_KMS("Found valid VBT in ACPI OpRegion (Mailbox #4)\n");
1060 opregion->vbt = vbt;
1061 opregion->vbt_size = vbt_size;
1062 } else {
1063 DRM_DEBUG_KMS("Invalid VBT in ACPI OpRegion (Mailbox #4)\n");
1064 }
1065
1066 out:
1067 return 0;
1068
1069 err_out:
1070 iounmap(base);
1071 return err;
1072 }
1073
intel_use_opregion_panel_type_callback(const struct dmi_system_id * id)1074 static int intel_use_opregion_panel_type_callback(const struct dmi_system_id *id)
1075 {
1076 DRM_INFO("Using panel type from OpRegion on %s\n", id->ident);
1077 return 1;
1078 }
1079
1080 static const struct dmi_system_id intel_use_opregion_panel_type[] = {
1081 {
1082 .callback = intel_use_opregion_panel_type_callback,
1083 .ident = "Conrac GmbH IX45GM2",
1084 .matches = {DMI_MATCH(DMI_SYS_VENDOR, "Conrac GmbH"),
1085 DMI_MATCH(DMI_PRODUCT_NAME, "IX45GM2"),
1086 },
1087 },
1088 { }
1089 };
1090
1091 int
intel_opregion_get_panel_type(struct drm_i915_private * dev_priv)1092 intel_opregion_get_panel_type(struct drm_i915_private *dev_priv)
1093 {
1094 u32 panel_details;
1095 int ret;
1096
1097 ret = swsci(dev_priv, SWSCI_GBDA_PANEL_DETAILS, 0x0, &panel_details);
1098 if (ret) {
1099 DRM_DEBUG_KMS("Failed to get panel details from OpRegion (%d)\n",
1100 ret);
1101 return ret;
1102 }
1103
1104 ret = (panel_details >> 8) & 0xff;
1105 if (ret > 0x10) {
1106 DRM_DEBUG_KMS("Invalid OpRegion panel type 0x%x\n", ret);
1107 return -EINVAL;
1108 }
1109
1110 /* fall back to VBT panel type? */
1111 if (ret == 0x0) {
1112 DRM_DEBUG_KMS("No panel type in OpRegion\n");
1113 return -ENODEV;
1114 }
1115
1116 /*
1117 * So far we know that some machined must use it, others must not use it.
1118 * There doesn't seem to be any way to determine which way to go, except
1119 * via a quirk list :(
1120 */
1121 if (!dmi_check_system(intel_use_opregion_panel_type)) {
1122 DRM_DEBUG_KMS("Ignoring OpRegion panel type (%d)\n", ret - 1);
1123 return -ENODEV;
1124 }
1125
1126 return ret - 1;
1127 }
1128