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drm/i915: Ignore OpRegion panel type except on select machines
[linux-2.6-block.git] / drivers / gpu / drm / i915 / intel_opregion.c
CommitLineData
8ee1c3db
MG		 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>
b30581a4 29#include <linux/dmi.h>
74a365b3 30#include <acpi/video.h>
8ee1c3db 31
760285e7
DH		 32#include <drm/drmP.h>
33#include <drm/i915_drm.h>
8ee1c3db 34#include "i915_drv.h"
a9573556 35#include "intel_drv.h"
8ee1c3db 36
8ee1c3db
MG		 37#define OPREGION_HEADER_OFFSET 0
38#define OPREGION_ACPI_OFFSET 0x100
82d3c90c
CW		 39#define ACPI_CLID 0x01ac /* current lid state indicator */
40#define ACPI_CDCK 0x01b0 /* current docking state indicator */
8ee1c3db
MG		 41#define OPREGION_SWSCI_OFFSET 0x200
42#define OPREGION_ASLE_OFFSET 0x300
44834a67 43#define OPREGION_VBT_OFFSET 0x400
b3cbd98b 44#define OPREGION_ASLE_EXT_OFFSET 0x1C00
8ee1c3db
MG		 45
46#define OPREGION_SIGNATURE "IntelGraphicsMem"
47#define MBOX_ACPI (1<<0)
48#define MBOX_SWSCI (1<<1)
49#define MBOX_ASLE (1<<2)
f6a430d8 50#define MBOX_ASLE_EXT (1<<4)
8ee1c3db
MG		 51
52struct opregion_header {
0206e353
AJ		 53 u8 signature[16];
54 u32 size;
55 u32 opregion_ver;
56 u8 bios_ver[32];
57 u8 vbios_ver[16];
58 u8 driver_ver[16];
59 u32 mboxes;
f6a430d8
JN		 60 u32 driver_model;
61 u32 pcon;
62 u8 dver[32];
63 u8 rsvd[124];
e4451239 64} __packed;
8ee1c3db
MG		 65
66/* OpRegion mailbox #1: public ACPI methods */
67struct opregion_acpi {
0206e353
AJ		 68 u32 drdy; /* driver readiness */
69 u32 csts; /* notification status */
70 u32 cevt; /* current event */
71 u8 rsvd1[20];
72 u32 didl[8]; /* supported display devices ID list */
73 u32 cpdl[8]; /* currently presented display list */
74 u32 cadl[8]; /* currently active display list */
75 u32 nadl[8]; /* next active devices list */
76 u32 aslp; /* ASL sleep time-out */
77 u32 tidx; /* toggle table index */
78 u32 chpd; /* current hotplug enable indicator */
79 u32 clid; /* current lid state*/
80 u32 cdck; /* current docking state */
81 u32 sxsw; /* Sx state resume */
82 u32 evts; /* ASL supported events */
83 u32 cnot; /* current OS notification */
84 u32 nrdy; /* driver status */
f6a430d8
JN		 85 u32 did2[7]; /* extended supported display devices ID list */
86 u32 cpd2[7]; /* extended attached display devices list */
87 u8 rsvd2[4];
e4451239 88} __packed;
8ee1c3db
MG		 89
90/* OpRegion mailbox #2: SWSCI */
91struct opregion_swsci {
0206e353
AJ		 92 u32 scic; /* SWSCI command|status|data */
93 u32 parm; /* command parameters */
94 u32 dslp; /* driver sleep time-out */
95 u8 rsvd[244];
e4451239 96} __packed;
8ee1c3db
MG		 97
98/* OpRegion mailbox #3: ASLE */
99struct opregion_asle {
0206e353
AJ		 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 */
507c1a45
PZ		 112 u32 cddv; /* color correction default values */
113 u32 pcft; /* power conservation features */
114 u32 srot; /* supported rotation angles */
115 u32 iuer; /* IUER events */
f6a430d8
JN		 116 u64 fdss;
117 u32 fdsp;
118 u32 stat;
c85f6c91
D		 119 u64 rvda; /* Physical address of raw vbt data */
120 u32 rvds; /* Size of raw vbt data */
121 u8 rsvd[58];
e4451239 122} __packed;
8ee1c3db 123
b3cbd98b
D		 124/* OpRegion mailbox #5: ASLE ext */
125struct opregion_asle_ext {
126 u32 phed; /* Panel Header */
127 u8 bddc[256]; /* Panel EDID */
128 u8 rsvd[764];
129} __packed;
130
68bca4b0
JN		 131/* Driver readiness indicator */
132#define ASLE_ARDY_READY (1 << 0)
133#define ASLE_ARDY_NOT_READY (0 << 0)
134
507c1a45
PZ		 135/* ASLE Interrupt Command (ASLC) bits */
136#define ASLC_SET_ALS_ILLUM (1 << 0)
137#define ASLC_SET_BACKLIGHT (1 << 1)
138#define ASLC_SET_PFIT (1 << 2)
139#define ASLC_SET_PWM_FREQ (1 << 3)
140#define ASLC_SUPPORTED_ROTATION_ANGLES (1 << 4)
141#define ASLC_BUTTON_ARRAY (1 << 5)
142#define ASLC_CONVERTIBLE_INDICATOR (1 << 6)
143#define ASLC_DOCKING_INDICATOR (1 << 7)
144#define ASLC_ISCT_STATE_CHANGE (1 << 8)
145#define ASLC_REQ_MSK 0x1ff
146/* response bits */
147#define ASLC_ALS_ILLUM_FAILED (1 << 10)
148#define ASLC_BACKLIGHT_FAILED (1 << 12)
149#define ASLC_PFIT_FAILED (1 << 14)
150#define ASLC_PWM_FREQ_FAILED (1 << 16)
151#define ASLC_ROTATION_ANGLES_FAILED (1 << 18)
152#define ASLC_BUTTON_ARRAY_FAILED (1 << 20)
153#define ASLC_CONVERTIBLE_FAILED (1 << 22)
154#define ASLC_DOCKING_FAILED (1 << 24)
155#define ASLC_ISCT_STATE_FAILED (1 << 26)
8ee1c3db 156
f599cc29
JN		 157/* Technology enabled indicator */
158#define ASLE_TCHE_ALS_EN (1 << 0)
159#define ASLE_TCHE_BLC_EN (1 << 1)
160#define ASLE_TCHE_PFIT_EN (1 << 2)
161#define ASLE_TCHE_PFMB_EN (1 << 3)
162
8ee1c3db
MG		 163/* ASLE backlight brightness to set */
164#define ASLE_BCLP_VALID (1<<31)
165#define ASLE_BCLP_MSK (~(1<<31))
166
167/* ASLE panel fitting request */
168#define ASLE_PFIT_VALID (1<<31)
169#define ASLE_PFIT_CENTER (1<<0)
170#define ASLE_PFIT_STRETCH_TEXT (1<<1)
171#define ASLE_PFIT_STRETCH_GFX (1<<2)
172
173/* PWM frequency and minimum brightness */
174#define ASLE_PFMB_BRIGHTNESS_MASK (0xff)
175#define ASLE_PFMB_BRIGHTNESS_VALID (1<<8)
176#define ASLE_PFMB_PWM_MASK (0x7ffffe00)
177#define ASLE_PFMB_PWM_VALID (1<<31)
178
179#define ASLE_CBLV_VALID (1<<31)
180
507c1a45
PZ		 181/* IUER */
182#define ASLE_IUER_DOCKING (1 << 7)
183#define ASLE_IUER_CONVERTIBLE (1 << 6)
184#define ASLE_IUER_ROTATION_LOCK_BTN (1 << 4)
185#define ASLE_IUER_VOLUME_DOWN_BTN (1 << 3)
186#define ASLE_IUER_VOLUME_UP_BTN (1 << 2)
187#define ASLE_IUER_WINDOWS_BTN (1 << 1)
188#define ASLE_IUER_POWER_BTN (1 << 0)
189
ebde53c7
JN		 190/* Software System Control Interrupt (SWSCI) */
191#define SWSCI_SCIC_INDICATOR (1 << 0)
192#define SWSCI_SCIC_MAIN_FUNCTION_SHIFT 1
193#define SWSCI_SCIC_MAIN_FUNCTION_MASK (0xf << 1)
194#define SWSCI_SCIC_SUB_FUNCTION_SHIFT 8
195#define SWSCI_SCIC_SUB_FUNCTION_MASK (0xff << 8)
196#define SWSCI_SCIC_EXIT_PARAMETER_SHIFT 8
197#define SWSCI_SCIC_EXIT_PARAMETER_MASK (0xff << 8)
198#define SWSCI_SCIC_EXIT_STATUS_SHIFT 5
199#define SWSCI_SCIC_EXIT_STATUS_MASK (7 << 5)
200#define SWSCI_SCIC_EXIT_STATUS_SUCCESS 1
201
202#define SWSCI_FUNCTION_CODE(main, sub) \
203 ((main) << SWSCI_SCIC_MAIN_FUNCTION_SHIFT | \
204 (sub) << SWSCI_SCIC_SUB_FUNCTION_SHIFT)
205
206/* SWSCI: Get BIOS Data (GBDA) */
207#define SWSCI_GBDA 4
208#define SWSCI_GBDA_SUPPORTED_CALLS SWSCI_FUNCTION_CODE(SWSCI_GBDA, 0)
209#define SWSCI_GBDA_REQUESTED_CALLBACKS SWSCI_FUNCTION_CODE(SWSCI_GBDA, 1)
210#define SWSCI_GBDA_BOOT_DISPLAY_PREF SWSCI_FUNCTION_CODE(SWSCI_GBDA, 4)
211#define SWSCI_GBDA_PANEL_DETAILS SWSCI_FUNCTION_CODE(SWSCI_GBDA, 5)
212#define SWSCI_GBDA_TV_STANDARD SWSCI_FUNCTION_CODE(SWSCI_GBDA, 6)
213#define SWSCI_GBDA_INTERNAL_GRAPHICS SWSCI_FUNCTION_CODE(SWSCI_GBDA, 7)
214#define SWSCI_GBDA_SPREAD_SPECTRUM SWSCI_FUNCTION_CODE(SWSCI_GBDA, 10)
215
216/* SWSCI: System BIOS Callbacks (SBCB) */
217#define SWSCI_SBCB 6
218#define SWSCI_SBCB_SUPPORTED_CALLBACKS SWSCI_FUNCTION_CODE(SWSCI_SBCB, 0)
219#define SWSCI_SBCB_INIT_COMPLETION SWSCI_FUNCTION_CODE(SWSCI_SBCB, 1)
220#define SWSCI_SBCB_PRE_HIRES_SET_MODE SWSCI_FUNCTION_CODE(SWSCI_SBCB, 3)
221#define SWSCI_SBCB_POST_HIRES_SET_MODE SWSCI_FUNCTION_CODE(SWSCI_SBCB, 4)
222#define SWSCI_SBCB_DISPLAY_SWITCH SWSCI_FUNCTION_CODE(SWSCI_SBCB, 5)
223#define SWSCI_SBCB_SET_TV_FORMAT SWSCI_FUNCTION_CODE(SWSCI_SBCB, 6)
224#define SWSCI_SBCB_ADAPTER_POWER_STATE SWSCI_FUNCTION_CODE(SWSCI_SBCB, 7)
225#define SWSCI_SBCB_DISPLAY_POWER_STATE SWSCI_FUNCTION_CODE(SWSCI_SBCB, 8)
226#define SWSCI_SBCB_SET_BOOT_DISPLAY SWSCI_FUNCTION_CODE(SWSCI_SBCB, 9)
227#define SWSCI_SBCB_SET_PANEL_DETAILS SWSCI_FUNCTION_CODE(SWSCI_SBCB, 10)
228#define SWSCI_SBCB_SET_INTERNAL_GFX SWSCI_FUNCTION_CODE(SWSCI_SBCB, 11)
229#define SWSCI_SBCB_POST_HIRES_TO_DOS_FS SWSCI_FUNCTION_CODE(SWSCI_SBCB, 16)
230#define SWSCI_SBCB_SUSPEND_RESUME SWSCI_FUNCTION_CODE(SWSCI_SBCB, 17)
231#define SWSCI_SBCB_SET_SPREAD_SPECTRUM SWSCI_FUNCTION_CODE(SWSCI_SBCB, 18)
232#define SWSCI_SBCB_POST_VBE_PM SWSCI_FUNCTION_CODE(SWSCI_SBCB, 19)
233#define SWSCI_SBCB_ENABLE_DISABLE_AUDIO SWSCI_FUNCTION_CODE(SWSCI_SBCB, 21)
234
25affa73
JN		 235/*
236 * ACPI Specification, Revision 5.0, Appendix B.3.2 _DOD (Enumerate All Devices
237 * Attached to the Display Adapter).
238 */
239#define ACPI_DISPLAY_INDEX_SHIFT 0
240#define ACPI_DISPLAY_INDEX_MASK (0xf << 0)
241#define ACPI_DISPLAY_PORT_ATTACHMENT_SHIFT 4
242#define ACPI_DISPLAY_PORT_ATTACHMENT_MASK (0xf << 4)
243#define ACPI_DISPLAY_TYPE_SHIFT 8
244#define ACPI_DISPLAY_TYPE_MASK (0xf << 8)
245#define ACPI_DISPLAY_TYPE_OTHER (0 << 8)
246#define ACPI_DISPLAY_TYPE_VGA (1 << 8)
247#define ACPI_DISPLAY_TYPE_TV (2 << 8)
248#define ACPI_DISPLAY_TYPE_EXTERNAL_DIGITAL (3 << 8)
249#define ACPI_DISPLAY_TYPE_INTERNAL_DIGITAL (4 << 8)
250#define ACPI_VENDOR_SPECIFIC_SHIFT 12
251#define ACPI_VENDOR_SPECIFIC_MASK (0xf << 12)
252#define ACPI_BIOS_CAN_DETECT (1 << 16)
253#define ACPI_DEPENDS_ON_VGA (1 << 17)
254#define ACPI_PIPE_ID_SHIFT 18
255#define ACPI_PIPE_ID_MASK (7 << 18)
256#define ACPI_DEVICE_ID_SCHEME (1 << 31)
74a365b3 257
bdde5c6a
JN		 258#define MAX_DSLP 1500
259
6f9f4b7a
CW		 260static int swsci(struct drm_i915_private *dev_priv,
261 u32 function, u32 parm, u32 *parm_out)
ebde53c7 262{
115719fc 263 struct opregion_swsci *swsci = dev_priv->opregion.swsci;
91c8a326 264 struct pci_dev *pdev = dev_priv->drm.pdev;
ebde53c7 265 u32 main_function, sub_function, scic;
e10fa551 266 u16 swsci_val;
ebde53c7
JN		 267 u32 dslp;
268
269 if (!swsci)
270 return -ENODEV;
271
272 main_function = (function & SWSCI_SCIC_MAIN_FUNCTION_MASK) >>
273 SWSCI_SCIC_MAIN_FUNCTION_SHIFT;
274 sub_function = (function & SWSCI_SCIC_SUB_FUNCTION_MASK) >>
275 SWSCI_SCIC_SUB_FUNCTION_SHIFT;
276
277 /* Check if we can call the function. See swsci_setup for details. */
278 if (main_function == SWSCI_SBCB) {
279 if ((dev_priv->opregion.swsci_sbcb_sub_functions &
280 (1 << sub_function)) == 0)
281 return -EINVAL;
282 } else if (main_function == SWSCI_GBDA) {
283 if ((dev_priv->opregion.swsci_gbda_sub_functions &
284 (1 << sub_function)) == 0)
285 return -EINVAL;
286 }
287
288 /* Driver sleep timeout in ms. */
115719fc 289 dslp = swsci->dslp;
ebde53c7 290 if (!dslp) {
4994aa8c
PZ		 291 /* The spec says 2ms should be the default, but it's too small
292 * for some machines. */
293 dslp = 50;
bdde5c6a 294 } else if (dslp > MAX_DSLP) {
ebde53c7 295 /* Hey bios, trust must be earned. */
bdde5c6a
JN		 296 DRM_INFO_ONCE("ACPI BIOS requests an excessive sleep of %u ms, "
297 "using %u ms instead\n", dslp, MAX_DSLP);
298 dslp = MAX_DSLP;
ebde53c7
JN		 299 }
300
301 /* The spec tells us to do this, but we are the only user... */
115719fc 302 scic = swsci->scic;
ebde53c7
JN		 303 if (scic & SWSCI_SCIC_INDICATOR) {
304 DRM_DEBUG_DRIVER("SWSCI request already in progress\n");
305 return -EBUSY;
306 }
307
308 scic = function | SWSCI_SCIC_INDICATOR;
309
115719fc
WD		 310 swsci->parm = parm;
311 swsci->scic = scic;
ebde53c7
JN		 312
313 /* Ensure SCI event is selected and event trigger is cleared. */
6f9f4b7a 314 pci_read_config_word(pdev, SWSCI, &swsci_val);
e10fa551
JL		 315 if (!(swsci_val & SWSCI_SCISEL) || (swsci_val & SWSCI_GSSCIE)) {
316 swsci_val |= SWSCI_SCISEL;
317 swsci_val &= ~SWSCI_GSSCIE;
6f9f4b7a 318 pci_write_config_word(pdev, SWSCI, swsci_val);
ebde53c7
JN		 319 }
320
321 /* Use event trigger to tell bios to check the mail. */
e10fa551 322 swsci_val |= SWSCI_GSSCIE;
6f9f4b7a 323 pci_write_config_word(pdev, SWSCI, swsci_val);
ebde53c7
JN		 324
325 /* Poll for the result. */
115719fc 326#define C (((scic = swsci->scic) & SWSCI_SCIC_INDICATOR) == 0)
ebde53c7
JN		 327 if (wait_for(C, dslp)) {
328 DRM_DEBUG_DRIVER("SWSCI request timed out\n");
329 return -ETIMEDOUT;
330 }
331
332 scic = (scic & SWSCI_SCIC_EXIT_STATUS_MASK) >>
333 SWSCI_SCIC_EXIT_STATUS_SHIFT;
334
335 /* Note: scic == 0 is an error! */
336 if (scic != SWSCI_SCIC_EXIT_STATUS_SUCCESS) {
337 DRM_DEBUG_DRIVER("SWSCI request error %u\n", scic);
338 return -EIO;
339 }
340
341 if (parm_out)
115719fc 342 *parm_out = swsci->parm;
ebde53c7
JN		 343
344 return 0;
345
346#undef C
347}
348
9c4b0a68
JN		 349#define DISPLAY_TYPE_CRT 0
350#define DISPLAY_TYPE_TV 1
351#define DISPLAY_TYPE_EXTERNAL_FLAT_PANEL 2
352#define DISPLAY_TYPE_INTERNAL_FLAT_PANEL 3
353
354int intel_opregion_notify_encoder(struct intel_encoder *intel_encoder,
355 bool enable)
356{
6f9f4b7a 357 struct drm_i915_private *dev_priv = to_i915(intel_encoder->base.dev);
9c4b0a68
JN		 358 u32 parm = 0;
359 u32 type = 0;
360 u32 port;
361
362 /* don't care about old stuff for now */
6f9f4b7a 363 if (!HAS_DDI(dev_priv))
9c4b0a68
JN		 364 return 0;
365
7d4aefd0
SS		 366 if (intel_encoder->type == INTEL_OUTPUT_DSI)
367 port = 0;
368 else
369 port = intel_ddi_get_encoder_port(intel_encoder);
370
371 if (port == PORT_E) {
9c4b0a68
JN		 372 port = 0;
373 } else {
374 parm |= 1 << port;
375 port++;
376 }
377
378 if (!enable)
379 parm |= 4 << 8;
380
381 switch (intel_encoder->type) {
382 case INTEL_OUTPUT_ANALOG:
383 type = DISPLAY_TYPE_CRT;
384 break;
385 case INTEL_OUTPUT_UNKNOWN:
cca0502b 386 case INTEL_OUTPUT_DP:
9c4b0a68 387 case INTEL_OUTPUT_HDMI:
0e32b39c 388 case INTEL_OUTPUT_DP_MST:
9c4b0a68
JN		 389 type = DISPLAY_TYPE_EXTERNAL_FLAT_PANEL;
390 break;
391 case INTEL_OUTPUT_EDP:
7d4aefd0 392 case INTEL_OUTPUT_DSI:
9c4b0a68
JN		 393 type = DISPLAY_TYPE_INTERNAL_FLAT_PANEL;
394 break;
395 default:
396 WARN_ONCE(1, "unsupported intel_encoder type %d\n",
397 intel_encoder->type);
398 return -EINVAL;
399 }
400
401 parm |= type << (16 + port * 3);
402
6f9f4b7a 403 return swsci(dev_priv, SWSCI_SBCB_DISPLAY_POWER_STATE, parm, NULL);
9c4b0a68
JN		 404}
405
ecbc5cf3
JN		 406static const struct {
407 pci_power_t pci_power_state;
408 u32 parm;
409} power_state_map[] = {
410 { PCI_D0, 0x00 },
411 { PCI_D1, 0x01 },
412 { PCI_D2, 0x02 },
413 { PCI_D3hot, 0x04 },
414 { PCI_D3cold, 0x04 },
415};
416
6f9f4b7a
CW		 417int intel_opregion_notify_adapter(struct drm_i915_private *dev_priv,
418 pci_power_t state)
ecbc5cf3
JN		 419{
420 int i;
421
6f9f4b7a 422 if (!HAS_DDI(dev_priv))
ecbc5cf3
JN		 423 return 0;
424
425 for (i = 0; i < ARRAY_SIZE(power_state_map); i++) {
426 if (state == power_state_map[i].pci_power_state)
6f9f4b7a 427 return swsci(dev_priv, SWSCI_SBCB_ADAPTER_POWER_STATE,
ecbc5cf3
JN		 428 power_state_map[i].parm, NULL);
429 }
430
431 return -EINVAL;
432}
433
6f9f4b7a 434static u32 asle_set_backlight(struct drm_i915_private *dev_priv, u32 bclp)
8ee1c3db 435{
19c8054c 436 struct intel_connector *connector;
115719fc 437 struct opregion_asle *asle = dev_priv->opregion.asle;
91c8a326 438 struct drm_device *dev = &dev_priv->drm;
8ee1c3db 439
749052fb
JN		 440 DRM_DEBUG_DRIVER("bclp = 0x%08x\n", bclp);
441
da882e5a 442 if (acpi_video_get_backlight_type() == acpi_backlight_native) {
0b9f7d93
AL		 443 DRM_DEBUG_KMS("opregion backlight request ignored\n");
444 return 0;
445 }
446
8ee1c3db 447 if (!(bclp & ASLE_BCLP_VALID))
507c1a45 448 return ASLC_BACKLIGHT_FAILED;
8ee1c3db
MG		 449
450 bclp &= ASLE_BCLP_MSK;
a9573556 451 if (bclp > 255)
507c1a45 452 return ASLC_BACKLIGHT_FAILED;
8ee1c3db 453
51fd371b 454 drm_modeset_lock(&dev->mode_config.connection_mutex, NULL);
c91c9f32 455
752aa88a 456 /*
c91c9f32
JN		 457 * Update backlight on all connectors that support backlight (usually
458 * only one).
752aa88a 459 */
540b5d02 460 DRM_DEBUG_KMS("updating opregion backlight %d/255\n", bclp);
19c8054c
JN		 461 for_each_intel_connector(dev, connector)
462 intel_panel_set_backlight_acpi(connector, bclp, 255);
115719fc 463 asle->cblv = DIV_ROUND_UP(bclp * 100, 255) | ASLE_CBLV_VALID;
8ee1c3db 464
51fd371b 465 drm_modeset_unlock(&dev->mode_config.connection_mutex);
752aa88a 466
c91c9f32
JN		 467
468 return 0;
8ee1c3db
MG		 469}
470
6f9f4b7a 471static u32 asle_set_als_illum(struct drm_i915_private *dev_priv, u32 alsi)
8ee1c3db
MG		 472{
473 /* alsi is the current ALS reading in lux. 0 indicates below sensor
474 range, 0xffff indicates above sensor range. 1-0xfffe are valid */
e93d440b 475 DRM_DEBUG_DRIVER("Illum is not supported\n");
507c1a45 476 return ASLC_ALS_ILLUM_FAILED;
8ee1c3db
MG		 477}
478
6f9f4b7a 479static u32 asle_set_pwm_freq(struct drm_i915_private *dev_priv, u32 pfmb)
8ee1c3db 480{
e93d440b 481 DRM_DEBUG_DRIVER("PWM freq is not supported\n");
507c1a45 482 return ASLC_PWM_FREQ_FAILED;
8ee1c3db
MG		 483}
484
6f9f4b7a 485static u32 asle_set_pfit(struct drm_i915_private *dev_priv, u32 pfit)
8ee1c3db
MG		 486{
487 /* Panel fitting is currently controlled by the X code, so this is a
488 noop until modesetting support works fully */
e93d440b 489 DRM_DEBUG_DRIVER("Pfit is not supported\n");
507c1a45
PZ		 490 return ASLC_PFIT_FAILED;
491}
492
6f9f4b7a 493static u32 asle_set_supported_rotation_angles(struct drm_i915_private *dev_priv, u32 srot)
507c1a45
PZ		 494{
495 DRM_DEBUG_DRIVER("SROT is not supported\n");
496 return ASLC_ROTATION_ANGLES_FAILED;
497}
498
6f9f4b7a 499static u32 asle_set_button_array(struct drm_i915_private *dev_priv, u32 iuer)
507c1a45
PZ		 500{
501 if (!iuer)
502 DRM_DEBUG_DRIVER("Button array event is not supported (nothing)\n");
503 if (iuer & ASLE_IUER_ROTATION_LOCK_BTN)
504 DRM_DEBUG_DRIVER("Button array event is not supported (rotation lock)\n");
505 if (iuer & ASLE_IUER_VOLUME_DOWN_BTN)
506 DRM_DEBUG_DRIVER("Button array event is not supported (volume down)\n");
507 if (iuer & ASLE_IUER_VOLUME_UP_BTN)
508 DRM_DEBUG_DRIVER("Button array event is not supported (volume up)\n");
509 if (iuer & ASLE_IUER_WINDOWS_BTN)
510 DRM_DEBUG_DRIVER("Button array event is not supported (windows)\n");
511 if (iuer & ASLE_IUER_POWER_BTN)
512 DRM_DEBUG_DRIVER("Button array event is not supported (power)\n");
513
514 return ASLC_BUTTON_ARRAY_FAILED;
515}
516
6f9f4b7a 517static u32 asle_set_convertible(struct drm_i915_private *dev_priv, u32 iuer)
507c1a45
PZ		 518{
519 if (iuer & ASLE_IUER_CONVERTIBLE)
520 DRM_DEBUG_DRIVER("Convertible is not supported (clamshell)\n");
521 else
522 DRM_DEBUG_DRIVER("Convertible is not supported (slate)\n");
523
524 return ASLC_CONVERTIBLE_FAILED;
525}
526
6f9f4b7a 527static u32 asle_set_docking(struct drm_i915_private *dev_priv, u32 iuer)
507c1a45
PZ		 528{
529 if (iuer & ASLE_IUER_DOCKING)
530 DRM_DEBUG_DRIVER("Docking is not supported (docked)\n");
531 else
532 DRM_DEBUG_DRIVER("Docking is not supported (undocked)\n");
533
534 return ASLC_DOCKING_FAILED;
535}
536
6f9f4b7a 537static u32 asle_isct_state(struct drm_i915_private *dev_priv)
507c1a45
PZ		 538{
539 DRM_DEBUG_DRIVER("ISCT is not supported\n");
540 return ASLC_ISCT_STATE_FAILED;
8ee1c3db
MG		 541}
542
91a60f20 543static void asle_work(struct work_struct *work)
8ee1c3db 544{
91a60f20
JN		 545 struct intel_opregion *opregion =
546 container_of(work, struct intel_opregion, asle_work);
547 struct drm_i915_private *dev_priv =
548 container_of(opregion, struct drm_i915_private, opregion);
115719fc 549 struct opregion_asle *asle = dev_priv->opregion.asle;
507c1a45
PZ		 550 u32 aslc_stat = 0;
551 u32 aslc_req;
8ee1c3db
MG		 552
553 if (!asle)
554 return;
555
115719fc 556 aslc_req = asle->aslc;
8ee1c3db 557
507c1a45
PZ		 558 if (!(aslc_req & ASLC_REQ_MSK)) {
559 DRM_DEBUG_DRIVER("No request on ASLC interrupt 0x%08x\n",
560 aslc_req);
8ee1c3db
MG		 561 return;
562 }
563
507c1a45 564 if (aslc_req & ASLC_SET_ALS_ILLUM)
6f9f4b7a 565 aslc_stat |= asle_set_als_illum(dev_priv, asle->alsi);
507c1a45
PZ		 566
567 if (aslc_req & ASLC_SET_BACKLIGHT)
6f9f4b7a 568 aslc_stat |= asle_set_backlight(dev_priv, asle->bclp);
507c1a45
PZ		 569
570 if (aslc_req & ASLC_SET_PFIT)
6f9f4b7a 571 aslc_stat |= asle_set_pfit(dev_priv, asle->pfit);
507c1a45
PZ		 572
573 if (aslc_req & ASLC_SET_PWM_FREQ)
6f9f4b7a 574 aslc_stat |= asle_set_pwm_freq(dev_priv, asle->pfmb);
507c1a45
PZ		 575
576 if (aslc_req & ASLC_SUPPORTED_ROTATION_ANGLES)
6f9f4b7a 577 aslc_stat |= asle_set_supported_rotation_angles(dev_priv,
115719fc 578 asle->srot);
507c1a45
PZ		 579
580 if (aslc_req & ASLC_BUTTON_ARRAY)
6f9f4b7a 581 aslc_stat |= asle_set_button_array(dev_priv, asle->iuer);
8ee1c3db 582
507c1a45 583 if (aslc_req & ASLC_CONVERTIBLE_INDICATOR)
6f9f4b7a 584 aslc_stat |= asle_set_convertible(dev_priv, asle->iuer);
8ee1c3db 585
507c1a45 586 if (aslc_req & ASLC_DOCKING_INDICATOR)
6f9f4b7a 587 aslc_stat |= asle_set_docking(dev_priv, asle->iuer);
8ee1c3db 588
507c1a45 589 if (aslc_req & ASLC_ISCT_STATE_CHANGE)
6f9f4b7a 590 aslc_stat |= asle_isct_state(dev_priv);
8ee1c3db 591
115719fc 592 asle->aslc = aslc_stat;
8ee1c3db
MG		 593}
594
91d14251 595void intel_opregion_asle_intr(struct drm_i915_private *dev_priv)
91a60f20 596{
91a60f20
JN		 597 if (dev_priv->opregion.asle)
598 schedule_work(&dev_priv->opregion.asle_work);
599}
600
8ee1c3db
MG		 601#define ACPI_EV_DISPLAY_SWITCH (1<<0)
602#define ACPI_EV_LID (1<<1)
603#define ACPI_EV_DOCK (1<<2)
604
605static struct intel_opregion *system_opregion;
606
b358d0a6
HE		 607static int intel_opregion_video_event(struct notifier_block *nb,
608 unsigned long val, void *data)
8ee1c3db
MG		 609{
610 /* The only video events relevant to opregion are 0x80. These indicate
611 either a docking event, lid switch or display switch request. In
612 Linux, these are handled by the dock, button and video drivers.
f5a3d0c4 613 */
8ee1c3db 614
f5a3d0c4 615 struct acpi_bus_event *event = data;
115719fc 616 struct opregion_acpi *acpi;
f5a3d0c4
MG		 617 int ret = NOTIFY_OK;
618
619 if (strcmp(event->device_class, ACPI_VIDEO_CLASS) != 0)
620 return NOTIFY_DONE;
8ee1c3db
MG		 621
622 if (!system_opregion)
623 return NOTIFY_DONE;
624
625 acpi = system_opregion->acpi;
f5a3d0c4 626
115719fc 627 if (event->type == 0x80 && ((acpi->cevt & 1) == 0))
f5a3d0c4
MG		 628 ret = NOTIFY_BAD;
629
115719fc 630 acpi->csts = 0;
8ee1c3db 631
f5a3d0c4 632 return ret;
8ee1c3db
MG		 633}
634
635static struct notifier_block intel_opregion_notifier = {
636 .notifier_call = intel_opregion_video_event,
637};
638
74a365b3
MG		 639/*
640 * Initialise the DIDL field in opregion. This passes a list of devices to
641 * the firmware. Values are defined by section B.4.2 of the ACPI specification
642 * (version 3)
643 */
644
d5cbb22f
JN		 645static u32 get_did(struct intel_opregion *opregion, int i)
646{
647 u32 did;
648
649 if (i < ARRAY_SIZE(opregion->acpi->didl)) {
115719fc 650 did = opregion->acpi->didl[i];
d5cbb22f
JN		 651 } else {
652 i -= ARRAY_SIZE(opregion->acpi->didl);
653
654 if (WARN_ON(i >= ARRAY_SIZE(opregion->acpi->did2)))
655 return 0;
656
115719fc 657 did = opregion->acpi->did2[i];
d5cbb22f
JN		 658 }
659
660 return did;
661}
662
663static void set_did(struct intel_opregion *opregion, int i, u32 val)
664{
665 if (i < ARRAY_SIZE(opregion->acpi->didl)) {
115719fc 666 opregion->acpi->didl[i] = val;
d5cbb22f
JN		 667 } else {
668 i -= ARRAY_SIZE(opregion->acpi->didl);
669
670 if (WARN_ON(i >= ARRAY_SIZE(opregion->acpi->did2)))
671 return;
672
115719fc 673 opregion->acpi->did2[i] = val;
d5cbb22f
JN		 674 }
675}
676
c37f7f57
JN		 677static u32 acpi_display_type(struct drm_connector *connector)
678{
bb9c1b97 679 u32 display_type;
c37f7f57
JN		 680
681 switch (connector->connector_type) {
682 case DRM_MODE_CONNECTOR_VGA:
683 case DRM_MODE_CONNECTOR_DVIA:
684 display_type = ACPI_DISPLAY_TYPE_VGA;
685 break;
686 case DRM_MODE_CONNECTOR_Composite:
687 case DRM_MODE_CONNECTOR_SVIDEO:
688 case DRM_MODE_CONNECTOR_Component:
689 case DRM_MODE_CONNECTOR_9PinDIN:
bb9c1b97 690 case DRM_MODE_CONNECTOR_TV:
c37f7f57
JN		 691 display_type = ACPI_DISPLAY_TYPE_TV;
692 break;
693 case DRM_MODE_CONNECTOR_DVII:
694 case DRM_MODE_CONNECTOR_DVID:
695 case DRM_MODE_CONNECTOR_DisplayPort:
696 case DRM_MODE_CONNECTOR_HDMIA:
697 case DRM_MODE_CONNECTOR_HDMIB:
698 display_type = ACPI_DISPLAY_TYPE_EXTERNAL_DIGITAL;
699 break;
700 case DRM_MODE_CONNECTOR_LVDS:
bb9c1b97
JN		 701 case DRM_MODE_CONNECTOR_eDP:
702 case DRM_MODE_CONNECTOR_DSI:
c37f7f57
JN		 703 display_type = ACPI_DISPLAY_TYPE_INTERNAL_DIGITAL;
704 break;
bb9c1b97
JN		 705 case DRM_MODE_CONNECTOR_Unknown:
706 case DRM_MODE_CONNECTOR_VIRTUAL:
707 display_type = ACPI_DISPLAY_TYPE_OTHER;
708 break;
709 default:
710 MISSING_CASE(connector->connector_type);
711 display_type = ACPI_DISPLAY_TYPE_OTHER;
712 break;
c37f7f57
JN		 713 }
714
715 return display_type;
716}
717
6f9f4b7a 718static void intel_didl_outputs(struct drm_i915_private *dev_priv)
74a365b3 719{
74a365b3 720 struct intel_opregion *opregion = &dev_priv->opregion;
91c8a326 721 struct pci_dev *pdev = dev_priv->drm.pdev;
74a365b3 722 struct drm_connector *connector;
3143751f
ZR		 723 acpi_handle handle;
724 struct acpi_device *acpi_dev, *acpi_cdev, *acpi_video_bus = NULL;
725 unsigned long long device_id;
726 acpi_status status;
dfc2066d 727 u32 temp, max_outputs;
74a365b3
MG		 728 int i = 0;
729
6f9f4b7a 730 handle = ACPI_HANDLE(&pdev->dev);
7d37beaa 731 if (!handle || acpi_bus_get_device(handle, &acpi_dev))
3143751f
ZR		 732 return;
733
d4e1a692 734 if (acpi_is_video_device(handle))
3143751f
ZR		 735 acpi_video_bus = acpi_dev;
736 else {
737 list_for_each_entry(acpi_cdev, &acpi_dev->children, node) {
d4e1a692 738 if (acpi_is_video_device(acpi_cdev->handle)) {
3143751f
ZR		 739 acpi_video_bus = acpi_cdev;
740 break;
741 }
742 }
743 }
744
745 if (!acpi_video_bus) {
78c3d5fa 746 DRM_DEBUG_KMS("No ACPI video bus found\n");
3143751f
ZR		 747 return;
748 }
749
dfc2066d
JN		 750 /*
751 * In theory, did2, the extended didl, gets added at opregion version
752 * 3.0. In practice, however, we're supposed to set it for earlier
753 * versions as well, since a BIOS that doesn't understand did2 should
754 * not look at it anyway. Use a variable so we can tweak this if a need
755 * arises later.
756 */
757 max_outputs = ARRAY_SIZE(opregion->acpi->didl) +
758 ARRAY_SIZE(opregion->acpi->did2);
759
3143751f 760 list_for_each_entry(acpi_cdev, &acpi_video_bus->children, node) {
dfc2066d
JN		 761 if (i >= max_outputs) {
762 DRM_DEBUG_KMS("More than %u outputs detected via ACPI\n",
763 max_outputs);
3143751f
ZR		 764 return;
765 }
d5cbb22f
JN		 766 status = acpi_evaluate_integer(acpi_cdev->handle, "_ADR",
767 NULL, &device_id);
3143751f
ZR		 768 if (ACPI_SUCCESS(status)) {
769 if (!device_id)
770 goto blind_set;
d5cbb22f 771 set_did(opregion, i++, (u32)(device_id & 0x0f0f));
3143751f
ZR		 772 }
773 }
774
775end:
dfc2066d
JN		 776 DRM_DEBUG_KMS("%d outputs detected\n", i);
777
778 /* If fewer than max outputs, the list must be null terminated */
779 if (i < max_outputs)
d5cbb22f 780 set_did(opregion, i, 0);
3143751f
ZR		 781 return;
782
783blind_set:
784 i = 0;
91c8a326
CW		 785 list_for_each_entry(connector,
786 &dev_priv->drm.mode_config.connector_list, head) {
c37f7f57
JN		 787 int display_type = acpi_display_type(connector);
788
dfc2066d
JN		 789 if (i >= max_outputs) {
790 DRM_DEBUG_KMS("More than %u outputs in connector list\n",
791 max_outputs);
74a365b3
MG		 792 return;
793 }
c37f7f57 794
d5cbb22f 795 temp = get_did(opregion, i);
c37f7f57 796 set_did(opregion, i, temp | (1 << 31) | display_type | i);
74a365b3
MG		 797 i++;
798 }
3143751f 799 goto end;
74a365b3
MG		 800}
801
6f9f4b7a 802static void intel_setup_cadls(struct drm_i915_private *dev_priv)
d627b62f 803{
d627b62f
L		 804 struct intel_opregion *opregion = &dev_priv->opregion;
805 int i = 0;
806 u32 disp_id;
807
808 /* Initialize the CADL field by duplicating the DIDL values.
809 * Technically, this is not always correct as display outputs may exist,
810 * but not active. This initialization is necessary for some Clevo
811 * laptops that check this field before processing the brightness and
812 * display switching hotkeys. Just like DIDL, CADL is NULL-terminated if
813 * there are less than eight devices. */
814 do {
d5cbb22f 815 disp_id = get_did(opregion, i);
115719fc 816 opregion->acpi->cadl[i] = disp_id;
d627b62f
L		 817 } while (++i < 8 && disp_id != 0);
818}
819
03d92e47 820void intel_opregion_register(struct drm_i915_private *dev_priv)
44834a67 821{
44834a67
CW		 822 struct intel_opregion *opregion = &dev_priv->opregion;
823
824 if (!opregion->header)
825 return;
826
827 if (opregion->acpi) {
6f9f4b7a
CW		 828 intel_didl_outputs(dev_priv);
829 intel_setup_cadls(dev_priv);
44834a67
CW		 830
831 /* Notify BIOS we are ready to handle ACPI video ext notifs.
832 * Right now, all the events are handled by the ACPI video module.
833 * We don't actually need to do anything with them. */
115719fc
WD		 834 opregion->acpi->csts = 0;
835 opregion->acpi->drdy = 1;
44834a67
CW		 836
837 system_opregion = opregion;
838 register_acpi_notifier(&intel_opregion_notifier);
839 }
840
68bca4b0 841 if (opregion->asle) {
115719fc
WD		 842 opregion->asle->tche = ASLE_TCHE_BLC_EN;
843 opregion->asle->ardy = ASLE_ARDY_READY;
68bca4b0 844 }
44834a67
CW		 845}
846
03d92e47 847void intel_opregion_unregister(struct drm_i915_private *dev_priv)
44834a67 848{
44834a67
CW		 849 struct intel_opregion *opregion = &dev_priv->opregion;
850
851 if (!opregion->header)
852 return;
853
68bca4b0 854 if (opregion->asle)
115719fc 855 opregion->asle->ardy = ASLE_ARDY_NOT_READY;
68bca4b0 856
91a60f20
JN		 857 cancel_work_sync(&dev_priv->opregion.asle_work);
858
44834a67 859 if (opregion->acpi) {
115719fc 860 opregion->acpi->drdy = 0;
44834a67
CW		 861
862 system_opregion = NULL;
863 unregister_acpi_notifier(&intel_opregion_notifier);
864 }
865
866 /* just clear all opregion memory pointers now */
115719fc 867 memunmap(opregion->header);
04ebaadb
JN		 868 if (opregion->rvda) {
869 memunmap(opregion->rvda);
870 opregion->rvda = NULL;
871 }
44834a67
CW		 872 opregion->header = NULL;
873 opregion->acpi = NULL;
874 opregion->swsci = NULL;
875 opregion->asle = NULL;
876 opregion->vbt = NULL;
794a79a6 877 opregion->lid_state = NULL;
44834a67 878}
ebde53c7 879
6f9f4b7a 880static void swsci_setup(struct drm_i915_private *dev_priv)
ebde53c7 881{
ebde53c7
JN		 882 struct intel_opregion *opregion = &dev_priv->opregion;
883 bool requested_callbacks = false;
884 u32 tmp;
885
886 /* Sub-function code 0 is okay, let's allow them. */
887 opregion->swsci_gbda_sub_functions = 1;
888 opregion->swsci_sbcb_sub_functions = 1;
889
890 /* We use GBDA to ask for supported GBDA calls. */
6f9f4b7a 891 if (swsci(dev_priv, SWSCI_GBDA_SUPPORTED_CALLS, 0, &tmp) == 0) {
ebde53c7
JN		 892 /* make the bits match the sub-function codes */
893 tmp <<= 1;
894 opregion->swsci_gbda_sub_functions |= tmp;
895 }
896
897 /*
898 * We also use GBDA to ask for _requested_ SBCB callbacks. The driver
899 * must not call interfaces that are not specifically requested by the
900 * bios.
901 */
6f9f4b7a 902 if (swsci(dev_priv, SWSCI_GBDA_REQUESTED_CALLBACKS, 0, &tmp) == 0) {
ebde53c7
JN		 903 /* here, the bits already match sub-function codes */
904 opregion->swsci_sbcb_sub_functions |= tmp;
905 requested_callbacks = true;
906 }
907
908 /*
909 * But we use SBCB to ask for _supported_ SBCB calls. This does not mean
910 * the callback is _requested_. But we still can't call interfaces that
911 * are not requested.
912 */
6f9f4b7a 913 if (swsci(dev_priv, SWSCI_SBCB_SUPPORTED_CALLBACKS, 0, &tmp) == 0) {
ebde53c7
JN		 914 /* make the bits match the sub-function codes */
915 u32 low = tmp & 0x7ff;
916 u32 high = tmp & ~0xfff; /* bit 11 is reserved */
917 tmp = (high << 4) | (low << 1) | 1;
918
919 /* best guess what to do with supported wrt requested */
920 if (requested_callbacks) {
921 u32 req = opregion->swsci_sbcb_sub_functions;
922 if ((req & tmp) != req)
923 DRM_DEBUG_DRIVER("SWSCI BIOS requested (%08x) SBCB callbacks that are not supported (%08x)\n", req, tmp);
924 /* XXX: for now, trust the requested callbacks */
925 /* opregion->swsci_sbcb_sub_functions &= tmp; */
926 } else {
927 opregion->swsci_sbcb_sub_functions |= tmp;
928 }
929 }
930
931 DRM_DEBUG_DRIVER("SWSCI GBDA callbacks %08x, SBCB callbacks %08x\n",
932 opregion->swsci_gbda_sub_functions,
933 opregion->swsci_sbcb_sub_functions);
934}
44834a67 935
b30581a4
JN		 936static int intel_no_opregion_vbt_callback(const struct dmi_system_id *id)
937{
938 DRM_DEBUG_KMS("Falling back to manually reading VBT from "
939 "VBIOS ROM for %s\n", id->ident);
940 return 1;
941}
942
943static const struct dmi_system_id intel_no_opregion_vbt[] = {
944 {
945 .callback = intel_no_opregion_vbt_callback,
946 .ident = "ThinkCentre A57",
947 .matches = {
948 DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
949 DMI_MATCH(DMI_PRODUCT_NAME, "97027RG"),
950 },
951 },
952 { }
953};
954
6f9f4b7a 955int intel_opregion_setup(struct drm_i915_private *dev_priv)
8ee1c3db 956{
8ee1c3db 957 struct intel_opregion *opregion = &dev_priv->opregion;
91c8a326 958 struct pci_dev *pdev = dev_priv->drm.pdev;
8ee1c3db 959 u32 asls, mboxes;
5bc4418b 960 char buf[sizeof(OPREGION_SIGNATURE)];
8ee1c3db 961 int err = 0;
115719fc 962 void *base;
8ee1c3db 963
2d80391d
JN		 964 BUILD_BUG_ON(sizeof(struct opregion_header) != 0x100);
965 BUILD_BUG_ON(sizeof(struct opregion_acpi) != 0x100);
966 BUILD_BUG_ON(sizeof(struct opregion_swsci) != 0x100);
967 BUILD_BUG_ON(sizeof(struct opregion_asle) != 0x100);
b3cbd98b 968 BUILD_BUG_ON(sizeof(struct opregion_asle_ext) != 0x400);
2d80391d 969
6f9f4b7a 970 pci_read_config_dword(pdev, ASLS, &asls);
44d98a61 971 DRM_DEBUG_DRIVER("graphic opregion physical addr: 0x%x\n", asls);
8ee1c3db 972 if (asls == 0) {
44d98a61 973 DRM_DEBUG_DRIVER("ACPI OpRegion not supported!\n");
8ee1c3db
MG		 974 return -ENOTSUPP;
975 }
976
91a60f20
JN		 977 INIT_WORK(&opregion->asle_work, asle_work);
978
115719fc 979 base = memremap(asls, OPREGION_SIZE, MEMREMAP_WB);
8ee1c3db
MG		 980 if (!base)
981 return -ENOMEM;
982
115719fc 983 memcpy(buf, base, sizeof(buf));
5bc4418b
BW		 984
985 if (memcmp(buf, OPREGION_SIGNATURE, 16)) {
44d98a61 986 DRM_DEBUG_DRIVER("opregion signature mismatch\n");
8ee1c3db
MG		 987 err = -EINVAL;
988 goto err_out;
989 }
44834a67 990 opregion->header = base;
82d3c90c 991 opregion->lid_state = base + ACPI_CLID;
01fe9dbd 992
115719fc 993 mboxes = opregion->header->mboxes;
8ee1c3db 994 if (mboxes & MBOX_ACPI) {
44d98a61 995 DRM_DEBUG_DRIVER("Public ACPI methods supported\n");
8ee1c3db 996 opregion->acpi = base + OPREGION_ACPI_OFFSET;
8ee1c3db 997 }
8ee1c3db
MG		 998
999 if (mboxes & MBOX_SWSCI) {
44d98a61 1000 DRM_DEBUG_DRIVER("SWSCI supported\n");
8ee1c3db 1001 opregion->swsci = base + OPREGION_SWSCI_OFFSET;
6f9f4b7a 1002 swsci_setup(dev_priv);
8ee1c3db 1003 }
b3cbd98b 1004
8ee1c3db 1005 if (mboxes & MBOX_ASLE) {
44d98a61 1006 DRM_DEBUG_DRIVER("ASLE supported\n");
8ee1c3db 1007 opregion->asle = base + OPREGION_ASLE_OFFSET;
68bca4b0 1008
115719fc 1009 opregion->asle->ardy = ASLE_ARDY_NOT_READY;
8ee1c3db
MG		 1010 }
1011
b3cbd98b
D		 1012 if (mboxes & MBOX_ASLE_EXT)
1013 DRM_DEBUG_DRIVER("ASLE extension supported\n");
1014
f0067a31 1015 if (!dmi_check_system(intel_no_opregion_vbt)) {
04ebaadb
JN		 1016 const void *vbt = NULL;
1017 u32 vbt_size = 0;
1018
1019 if (opregion->header->opregion_ver >= 2 && opregion->asle &&
1020 opregion->asle->rvda && opregion->asle->rvds) {
1021 opregion->rvda = memremap(opregion->asle->rvda,
1022 opregion->asle->rvds,
1023 MEMREMAP_WB);
1024 vbt = opregion->rvda;
1025 vbt_size = opregion->asle->rvds;
1026 }
f0067a31
JN		 1027
1028 if (intel_bios_is_valid_vbt(vbt, vbt_size)) {
04ebaadb 1029 DRM_DEBUG_KMS("Found valid VBT in ACPI OpRegion (RVDA)\n");
f0067a31 1030 opregion->vbt = vbt;
ada8f955 1031 opregion->vbt_size = vbt_size;
04ebaadb
JN		 1032 } else {
1033 vbt = base + OPREGION_VBT_OFFSET;
1034 vbt_size = OPREGION_ASLE_EXT_OFFSET - OPREGION_VBT_OFFSET;
1035 if (intel_bios_is_valid_vbt(vbt, vbt_size)) {
1036 DRM_DEBUG_KMS("Found valid VBT in ACPI OpRegion (Mailbox #4)\n");
1037 opregion->vbt = vbt;
1038 opregion->vbt_size = vbt_size;
1039 }
f0067a31
JN		 1040 }
1041 }
b30581a4 1042
8ee1c3db
MG		 1043 return 0;
1044
1045err_out:
115719fc 1046 memunmap(base);
8ee1c3db
MG		 1047 return err;
1048}
a0562819 1049
ea54ff40
VS		 1050static int intel_use_opregion_panel_type_callback(const struct dmi_system_id *id)
1051{
1052 DRM_INFO("Using panel type from OpRegion on %s\n", id->ident);
1053 return 1;
1054}
1055
1056static const struct dmi_system_id intel_use_opregion_panel_type[] = {
1057 {
1058 .callback = intel_use_opregion_panel_type_callback,
1059 .ident = "Conrac GmbH IX45GM2",
1060 .matches = {DMI_MATCH(DMI_SYS_VENDOR, "Conrac GmbH"),
1061 DMI_MATCH(DMI_PRODUCT_NAME, "IX45GM2"),
1062 },
1063 },
1064 { }
1065};
1066
a0562819 1067int
6f9f4b7a 1068intel_opregion_get_panel_type(struct drm_i915_private *dev_priv)
a0562819
VS		 1069{
1070 u32 panel_details;
1071 int ret;
1072
6f9f4b7a 1073 ret = swsci(dev_priv, SWSCI_GBDA_PANEL_DETAILS, 0x0, &panel_details);
a0562819
VS		 1074 if (ret) {
1075 DRM_DEBUG_KMS("Failed to get panel details from OpRegion (%d)\n",
1076 ret);
1077 return ret;
1078 }
1079
1080 ret = (panel_details >> 8) & 0xff;
1081 if (ret > 0x10) {
1082 DRM_DEBUG_KMS("Invalid OpRegion panel type 0x%x\n", ret);
1083 return -EINVAL;
1084 }
1085
1086 /* fall back to VBT panel type? */
1087 if (ret == 0x0) {
1088 DRM_DEBUG_KMS("No panel type in OpRegion\n");
1089 return -ENODEV;
1090 }
1091
ea54ff40
VS		 1092 /*
1093 * So far we know that some machined must use it, others must not use it.
1094 * There doesn't seem to be any way to determine which way to go, except
1095 * via a quirk list :(
1096 */
1097 if (!dmi_check_system(intel_use_opregion_panel_type)) {
1098 DRM_DEBUG_KMS("Ignoring OpRegion panel type (%d)\n", ret - 1);
1099 return -ENODEV;
1100 }
1101
aeddda06
VS		 1102 /*
1103 * FIXME On Dell XPS 13 9350 the OpRegion panel type (0) gives us
1104 * low vswing for eDP, whereas the VBT panel type (2) gives us normal
1105 * vswing instead. Low vswing results in some display flickers, so
1106 * let's simply ignore the OpRegion panel type on SKL for now.
1107 */
5e580523 1108 if (IS_SKYLAKE(dev_priv)) {
aeddda06
VS		 1109 DRM_DEBUG_KMS("Ignoring OpRegion panel type (%d)\n", ret - 1);
1110 return -ENODEV;
1111 }
1112
a0562819
VS		 1113 return ret - 1;
1114}
Linux 6.x block layer and io_uring tree(s)