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drm/i915: Force clean compilation with -Werror
[deliverable/linux.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
ebde53c7
JN		 37#define PCI_ASLE 0xe4
38#define PCI_ASLS 0xfc
39#define PCI_SWSCI 0xe8
40#define PCI_SWSCI_SCISEL (1 << 15)
41#define PCI_SWSCI_GSSCIE (1 << 0)
8ee1c3db 42
8ee1c3db
MG		 43#define OPREGION_HEADER_OFFSET 0
44#define OPREGION_ACPI_OFFSET 0x100
82d3c90c
CW		 45#define ACPI_CLID 0x01ac /* current lid state indicator */
46#define ACPI_CDCK 0x01b0 /* current docking state indicator */
8ee1c3db
MG		 47#define OPREGION_SWSCI_OFFSET 0x200
48#define OPREGION_ASLE_OFFSET 0x300
44834a67 49#define OPREGION_VBT_OFFSET 0x400
b3cbd98b 50#define OPREGION_ASLE_EXT_OFFSET 0x1C00
8ee1c3db
MG		 51
52#define OPREGION_SIGNATURE "IntelGraphicsMem"
53#define MBOX_ACPI (1<<0)
54#define MBOX_SWSCI (1<<1)
55#define MBOX_ASLE (1<<2)
f6a430d8 56#define MBOX_ASLE_EXT (1<<4)
8ee1c3db
MG		 57
58struct opregion_header {
0206e353
AJ		 59 u8 signature[16];
60 u32 size;
61 u32 opregion_ver;
62 u8 bios_ver[32];
63 u8 vbios_ver[16];
64 u8 driver_ver[16];
65 u32 mboxes;
f6a430d8
JN		 66 u32 driver_model;
67 u32 pcon;
68 u8 dver[32];
69 u8 rsvd[124];
e4451239 70} __packed;
8ee1c3db
MG		 71
72/* OpRegion mailbox #1: public ACPI methods */
73struct opregion_acpi {
0206e353
AJ		 74 u32 drdy; /* driver readiness */
75 u32 csts; /* notification status */
76 u32 cevt; /* current event */
77 u8 rsvd1[20];
78 u32 didl[8]; /* supported display devices ID list */
79 u32 cpdl[8]; /* currently presented display list */
80 u32 cadl[8]; /* currently active display list */
81 u32 nadl[8]; /* next active devices list */
82 u32 aslp; /* ASL sleep time-out */
83 u32 tidx; /* toggle table index */
84 u32 chpd; /* current hotplug enable indicator */
85 u32 clid; /* current lid state*/
86 u32 cdck; /* current docking state */
87 u32 sxsw; /* Sx state resume */
88 u32 evts; /* ASL supported events */
89 u32 cnot; /* current OS notification */
90 u32 nrdy; /* driver status */
f6a430d8
JN		 91 u32 did2[7]; /* extended supported display devices ID list */
92 u32 cpd2[7]; /* extended attached display devices list */
93 u8 rsvd2[4];
e4451239 94} __packed;
8ee1c3db
MG		 95
96/* OpRegion mailbox #2: SWSCI */
97struct opregion_swsci {
0206e353
AJ		 98 u32 scic; /* SWSCI command|status|data */
99 u32 parm; /* command parameters */
100 u32 dslp; /* driver sleep time-out */
101 u8 rsvd[244];
e4451239 102} __packed;
8ee1c3db
MG		 103
104/* OpRegion mailbox #3: ASLE */
105struct opregion_asle {
0206e353
AJ		 106 u32 ardy; /* driver readiness */
107 u32 aslc; /* ASLE interrupt command */
108 u32 tche; /* technology enabled indicator */
109 u32 alsi; /* current ALS illuminance reading */
110 u32 bclp; /* backlight brightness to set */
111 u32 pfit; /* panel fitting state */
112 u32 cblv; /* current brightness level */
113 u16 bclm[20]; /* backlight level duty cycle mapping table */
114 u32 cpfm; /* current panel fitting mode */
115 u32 epfm; /* enabled panel fitting modes */
116 u8 plut[74]; /* panel LUT and identifier */
117 u32 pfmb; /* PWM freq and min brightness */
507c1a45
PZ		 118 u32 cddv; /* color correction default values */
119 u32 pcft; /* power conservation features */
120 u32 srot; /* supported rotation angles */
121 u32 iuer; /* IUER events */
f6a430d8
JN		 122 u64 fdss;
123 u32 fdsp;
124 u32 stat;
c85f6c91
D		 125 u64 rvda; /* Physical address of raw vbt data */
126 u32 rvds; /* Size of raw vbt data */
127 u8 rsvd[58];
e4451239 128} __packed;
8ee1c3db 129
b3cbd98b
D		 130/* OpRegion mailbox #5: ASLE ext */
131struct opregion_asle_ext {
132 u32 phed; /* Panel Header */
133 u8 bddc[256]; /* Panel EDID */
134 u8 rsvd[764];
135} __packed;
136
68bca4b0
JN		 137/* Driver readiness indicator */
138#define ASLE_ARDY_READY (1 << 0)
139#define ASLE_ARDY_NOT_READY (0 << 0)
140
507c1a45
PZ		 141/* ASLE Interrupt Command (ASLC) bits */
142#define ASLC_SET_ALS_ILLUM (1 << 0)
143#define ASLC_SET_BACKLIGHT (1 << 1)
144#define ASLC_SET_PFIT (1 << 2)
145#define ASLC_SET_PWM_FREQ (1 << 3)
146#define ASLC_SUPPORTED_ROTATION_ANGLES (1 << 4)
147#define ASLC_BUTTON_ARRAY (1 << 5)
148#define ASLC_CONVERTIBLE_INDICATOR (1 << 6)
149#define ASLC_DOCKING_INDICATOR (1 << 7)
150#define ASLC_ISCT_STATE_CHANGE (1 << 8)
151#define ASLC_REQ_MSK 0x1ff
152/* response bits */
153#define ASLC_ALS_ILLUM_FAILED (1 << 10)
154#define ASLC_BACKLIGHT_FAILED (1 << 12)
155#define ASLC_PFIT_FAILED (1 << 14)
156#define ASLC_PWM_FREQ_FAILED (1 << 16)
157#define ASLC_ROTATION_ANGLES_FAILED (1 << 18)
158#define ASLC_BUTTON_ARRAY_FAILED (1 << 20)
159#define ASLC_CONVERTIBLE_FAILED (1 << 22)
160#define ASLC_DOCKING_FAILED (1 << 24)
161#define ASLC_ISCT_STATE_FAILED (1 << 26)
8ee1c3db 162
f599cc29
JN		 163/* Technology enabled indicator */
164#define ASLE_TCHE_ALS_EN (1 << 0)
165#define ASLE_TCHE_BLC_EN (1 << 1)
166#define ASLE_TCHE_PFIT_EN (1 << 2)
167#define ASLE_TCHE_PFMB_EN (1 << 3)
168
8ee1c3db
MG		 169/* ASLE backlight brightness to set */
170#define ASLE_BCLP_VALID (1<<31)
171#define ASLE_BCLP_MSK (~(1<<31))
172
173/* ASLE panel fitting request */
174#define ASLE_PFIT_VALID (1<<31)
175#define ASLE_PFIT_CENTER (1<<0)
176#define ASLE_PFIT_STRETCH_TEXT (1<<1)
177#define ASLE_PFIT_STRETCH_GFX (1<<2)
178
179/* PWM frequency and minimum brightness */
180#define ASLE_PFMB_BRIGHTNESS_MASK (0xff)
181#define ASLE_PFMB_BRIGHTNESS_VALID (1<<8)
182#define ASLE_PFMB_PWM_MASK (0x7ffffe00)
183#define ASLE_PFMB_PWM_VALID (1<<31)
184
185#define ASLE_CBLV_VALID (1<<31)
186
507c1a45
PZ		 187/* IUER */
188#define ASLE_IUER_DOCKING (1 << 7)
189#define ASLE_IUER_CONVERTIBLE (1 << 6)
190#define ASLE_IUER_ROTATION_LOCK_BTN (1 << 4)
191#define ASLE_IUER_VOLUME_DOWN_BTN (1 << 3)
192#define ASLE_IUER_VOLUME_UP_BTN (1 << 2)
193#define ASLE_IUER_WINDOWS_BTN (1 << 1)
194#define ASLE_IUER_POWER_BTN (1 << 0)
195
ebde53c7
JN		 196/* Software System Control Interrupt (SWSCI) */
197#define SWSCI_SCIC_INDICATOR (1 << 0)
198#define SWSCI_SCIC_MAIN_FUNCTION_SHIFT 1
199#define SWSCI_SCIC_MAIN_FUNCTION_MASK (0xf << 1)
200#define SWSCI_SCIC_SUB_FUNCTION_SHIFT 8
201#define SWSCI_SCIC_SUB_FUNCTION_MASK (0xff << 8)
202#define SWSCI_SCIC_EXIT_PARAMETER_SHIFT 8
203#define SWSCI_SCIC_EXIT_PARAMETER_MASK (0xff << 8)
204#define SWSCI_SCIC_EXIT_STATUS_SHIFT 5
205#define SWSCI_SCIC_EXIT_STATUS_MASK (7 << 5)
206#define SWSCI_SCIC_EXIT_STATUS_SUCCESS 1
207
208#define SWSCI_FUNCTION_CODE(main, sub) \
209 ((main) << SWSCI_SCIC_MAIN_FUNCTION_SHIFT | \
210 (sub) << SWSCI_SCIC_SUB_FUNCTION_SHIFT)
211
212/* SWSCI: Get BIOS Data (GBDA) */
213#define SWSCI_GBDA 4
214#define SWSCI_GBDA_SUPPORTED_CALLS SWSCI_FUNCTION_CODE(SWSCI_GBDA, 0)
215#define SWSCI_GBDA_REQUESTED_CALLBACKS SWSCI_FUNCTION_CODE(SWSCI_GBDA, 1)
216#define SWSCI_GBDA_BOOT_DISPLAY_PREF SWSCI_FUNCTION_CODE(SWSCI_GBDA, 4)
217#define SWSCI_GBDA_PANEL_DETAILS SWSCI_FUNCTION_CODE(SWSCI_GBDA, 5)
218#define SWSCI_GBDA_TV_STANDARD SWSCI_FUNCTION_CODE(SWSCI_GBDA, 6)
219#define SWSCI_GBDA_INTERNAL_GRAPHICS SWSCI_FUNCTION_CODE(SWSCI_GBDA, 7)
220#define SWSCI_GBDA_SPREAD_SPECTRUM SWSCI_FUNCTION_CODE(SWSCI_GBDA, 10)
221
222/* SWSCI: System BIOS Callbacks (SBCB) */
223#define SWSCI_SBCB 6
224#define SWSCI_SBCB_SUPPORTED_CALLBACKS SWSCI_FUNCTION_CODE(SWSCI_SBCB, 0)
225#define SWSCI_SBCB_INIT_COMPLETION SWSCI_FUNCTION_CODE(SWSCI_SBCB, 1)
226#define SWSCI_SBCB_PRE_HIRES_SET_MODE SWSCI_FUNCTION_CODE(SWSCI_SBCB, 3)
227#define SWSCI_SBCB_POST_HIRES_SET_MODE SWSCI_FUNCTION_CODE(SWSCI_SBCB, 4)
228#define SWSCI_SBCB_DISPLAY_SWITCH SWSCI_FUNCTION_CODE(SWSCI_SBCB, 5)
229#define SWSCI_SBCB_SET_TV_FORMAT SWSCI_FUNCTION_CODE(SWSCI_SBCB, 6)
230#define SWSCI_SBCB_ADAPTER_POWER_STATE SWSCI_FUNCTION_CODE(SWSCI_SBCB, 7)
231#define SWSCI_SBCB_DISPLAY_POWER_STATE SWSCI_FUNCTION_CODE(SWSCI_SBCB, 8)
232#define SWSCI_SBCB_SET_BOOT_DISPLAY SWSCI_FUNCTION_CODE(SWSCI_SBCB, 9)
233#define SWSCI_SBCB_SET_PANEL_DETAILS SWSCI_FUNCTION_CODE(SWSCI_SBCB, 10)
234#define SWSCI_SBCB_SET_INTERNAL_GFX SWSCI_FUNCTION_CODE(SWSCI_SBCB, 11)
235#define SWSCI_SBCB_POST_HIRES_TO_DOS_FS SWSCI_FUNCTION_CODE(SWSCI_SBCB, 16)
236#define SWSCI_SBCB_SUSPEND_RESUME SWSCI_FUNCTION_CODE(SWSCI_SBCB, 17)
237#define SWSCI_SBCB_SET_SPREAD_SPECTRUM SWSCI_FUNCTION_CODE(SWSCI_SBCB, 18)
238#define SWSCI_SBCB_POST_VBE_PM SWSCI_FUNCTION_CODE(SWSCI_SBCB, 19)
239#define SWSCI_SBCB_ENABLE_DISABLE_AUDIO SWSCI_FUNCTION_CODE(SWSCI_SBCB, 21)
240
74a365b3
MG		 241#define ACPI_OTHER_OUTPUT (0<<8)
242#define ACPI_VGA_OUTPUT (1<<8)
243#define ACPI_TV_OUTPUT (2<<8)
244#define ACPI_DIGITAL_OUTPUT (3<<8)
245#define ACPI_LVDS_OUTPUT (4<<8)
246
bdde5c6a
JN		 247#define MAX_DSLP 1500
248
ebde53c7
JN		 249static int swsci(struct drm_device *dev, u32 function, u32 parm, u32 *parm_out)
250{
251 struct drm_i915_private *dev_priv = dev->dev_private;
115719fc 252 struct opregion_swsci *swsci = dev_priv->opregion.swsci;
ebde53c7
JN		 253 u32 main_function, sub_function, scic;
254 u16 pci_swsci;
255 u32 dslp;
256
257 if (!swsci)
258 return -ENODEV;
259
260 main_function = (function & SWSCI_SCIC_MAIN_FUNCTION_MASK) >>
261 SWSCI_SCIC_MAIN_FUNCTION_SHIFT;
262 sub_function = (function & SWSCI_SCIC_SUB_FUNCTION_MASK) >>
263 SWSCI_SCIC_SUB_FUNCTION_SHIFT;
264
265 /* Check if we can call the function. See swsci_setup for details. */
266 if (main_function == SWSCI_SBCB) {
267 if ((dev_priv->opregion.swsci_sbcb_sub_functions &
268 (1 << sub_function)) == 0)
269 return -EINVAL;
270 } else if (main_function == SWSCI_GBDA) {
271 if ((dev_priv->opregion.swsci_gbda_sub_functions &
272 (1 << sub_function)) == 0)
273 return -EINVAL;
274 }
275
276 /* Driver sleep timeout in ms. */
115719fc 277 dslp = swsci->dslp;
ebde53c7 278 if (!dslp) {
4994aa8c
PZ		 279 /* The spec says 2ms should be the default, but it's too small
280 * for some machines. */
281 dslp = 50;
bdde5c6a 282 } else if (dslp > MAX_DSLP) {
ebde53c7 283 /* Hey bios, trust must be earned. */
bdde5c6a
JN		 284 DRM_INFO_ONCE("ACPI BIOS requests an excessive sleep of %u ms, "
285 "using %u ms instead\n", dslp, MAX_DSLP);
286 dslp = MAX_DSLP;
ebde53c7
JN		 287 }
288
289 /* The spec tells us to do this, but we are the only user... */
115719fc 290 scic = swsci->scic;
ebde53c7
JN		 291 if (scic & SWSCI_SCIC_INDICATOR) {
292 DRM_DEBUG_DRIVER("SWSCI request already in progress\n");
293 return -EBUSY;
294 }
295
296 scic = function | SWSCI_SCIC_INDICATOR;
297
115719fc
WD		 298 swsci->parm = parm;
299 swsci->scic = scic;
ebde53c7
JN		 300
301 /* Ensure SCI event is selected and event trigger is cleared. */
302 pci_read_config_word(dev->pdev, PCI_SWSCI, &pci_swsci);
303 if (!(pci_swsci & PCI_SWSCI_SCISEL) || (pci_swsci & PCI_SWSCI_GSSCIE)) {
304 pci_swsci |= PCI_SWSCI_SCISEL;
305 pci_swsci &= ~PCI_SWSCI_GSSCIE;
306 pci_write_config_word(dev->pdev, PCI_SWSCI, pci_swsci);
307 }
308
309 /* Use event trigger to tell bios to check the mail. */
310 pci_swsci |= PCI_SWSCI_GSSCIE;
311 pci_write_config_word(dev->pdev, PCI_SWSCI, pci_swsci);
312
313 /* Poll for the result. */
115719fc 314#define C (((scic = swsci->scic) & SWSCI_SCIC_INDICATOR) == 0)
ebde53c7
JN		 315 if (wait_for(C, dslp)) {
316 DRM_DEBUG_DRIVER("SWSCI request timed out\n");
317 return -ETIMEDOUT;
318 }
319
320 scic = (scic & SWSCI_SCIC_EXIT_STATUS_MASK) >>
321 SWSCI_SCIC_EXIT_STATUS_SHIFT;
322
323 /* Note: scic == 0 is an error! */
324 if (scic != SWSCI_SCIC_EXIT_STATUS_SUCCESS) {
325 DRM_DEBUG_DRIVER("SWSCI request error %u\n", scic);
326 return -EIO;
327 }
328
329 if (parm_out)
115719fc 330 *parm_out = swsci->parm;
ebde53c7
JN		 331
332 return 0;
333
334#undef C
335}
336
9c4b0a68
JN		 337#define DISPLAY_TYPE_CRT 0
338#define DISPLAY_TYPE_TV 1
339#define DISPLAY_TYPE_EXTERNAL_FLAT_PANEL 2
340#define DISPLAY_TYPE_INTERNAL_FLAT_PANEL 3
341
342int intel_opregion_notify_encoder(struct intel_encoder *intel_encoder,
343 bool enable)
344{
345 struct drm_device *dev = intel_encoder->base.dev;
346 u32 parm = 0;
347 u32 type = 0;
348 u32 port;
349
350 /* don't care about old stuff for now */
351 if (!HAS_DDI(dev))
352 return 0;
353
7d4aefd0
SS		 354 if (intel_encoder->type == INTEL_OUTPUT_DSI)
355 port = 0;
356 else
357 port = intel_ddi_get_encoder_port(intel_encoder);
358
359 if (port == PORT_E) {
9c4b0a68
JN		 360 port = 0;
361 } else {
362 parm |= 1 << port;
363 port++;
364 }
365
366 if (!enable)
367 parm |= 4 << 8;
368
369 switch (intel_encoder->type) {
370 case INTEL_OUTPUT_ANALOG:
371 type = DISPLAY_TYPE_CRT;
372 break;
373 case INTEL_OUTPUT_UNKNOWN:
374 case INTEL_OUTPUT_DISPLAYPORT:
375 case INTEL_OUTPUT_HDMI:
0e32b39c 376 case INTEL_OUTPUT_DP_MST:
9c4b0a68
JN		 377 type = DISPLAY_TYPE_EXTERNAL_FLAT_PANEL;
378 break;
379 case INTEL_OUTPUT_EDP:
7d4aefd0 380 case INTEL_OUTPUT_DSI:
9c4b0a68
JN		 381 type = DISPLAY_TYPE_INTERNAL_FLAT_PANEL;
382 break;
383 default:
384 WARN_ONCE(1, "unsupported intel_encoder type %d\n",
385 intel_encoder->type);
386 return -EINVAL;
387 }
388
389 parm |= type << (16 + port * 3);
390
391 return swsci(dev, SWSCI_SBCB_DISPLAY_POWER_STATE, parm, NULL);
392}
393
ecbc5cf3
JN		 394static const struct {
395 pci_power_t pci_power_state;
396 u32 parm;
397} power_state_map[] = {
398 { PCI_D0, 0x00 },
399 { PCI_D1, 0x01 },
400 { PCI_D2, 0x02 },
401 { PCI_D3hot, 0x04 },
402 { PCI_D3cold, 0x04 },
403};
404
405int intel_opregion_notify_adapter(struct drm_device *dev, pci_power_t state)
406{
407 int i;
408
409 if (!HAS_DDI(dev))
410 return 0;
411
412 for (i = 0; i < ARRAY_SIZE(power_state_map); i++) {
413 if (state == power_state_map[i].pci_power_state)
414 return swsci(dev, SWSCI_SBCB_ADAPTER_POWER_STATE,
415 power_state_map[i].parm, NULL);
416 }
417
418 return -EINVAL;
419}
420
8ee1c3db
MG		 421static u32 asle_set_backlight(struct drm_device *dev, u32 bclp)
422{
423 struct drm_i915_private *dev_priv = dev->dev_private;
19c8054c 424 struct intel_connector *connector;
115719fc 425 struct opregion_asle *asle = dev_priv->opregion.asle;
8ee1c3db 426
749052fb
JN		 427 DRM_DEBUG_DRIVER("bclp = 0x%08x\n", bclp);
428
da882e5a 429 if (acpi_video_get_backlight_type() == acpi_backlight_native) {
0b9f7d93
AL		 430 DRM_DEBUG_KMS("opregion backlight request ignored\n");
431 return 0;
432 }
433
8ee1c3db 434 if (!(bclp & ASLE_BCLP_VALID))
507c1a45 435 return ASLC_BACKLIGHT_FAILED;
8ee1c3db
MG		 436
437 bclp &= ASLE_BCLP_MSK;
a9573556 438 if (bclp > 255)
507c1a45 439 return ASLC_BACKLIGHT_FAILED;
8ee1c3db 440
51fd371b 441 drm_modeset_lock(&dev->mode_config.connection_mutex, NULL);
c91c9f32 442
752aa88a 443 /*
c91c9f32
JN		 444 * Update backlight on all connectors that support backlight (usually
445 * only one).
752aa88a 446 */
540b5d02 447 DRM_DEBUG_KMS("updating opregion backlight %d/255\n", bclp);
19c8054c
JN		 448 for_each_intel_connector(dev, connector)
449 intel_panel_set_backlight_acpi(connector, bclp, 255);
115719fc 450 asle->cblv = DIV_ROUND_UP(bclp * 100, 255) | ASLE_CBLV_VALID;
8ee1c3db 451
51fd371b 452 drm_modeset_unlock(&dev->mode_config.connection_mutex);
752aa88a 453
c91c9f32
JN		 454
455 return 0;
8ee1c3db
MG		 456}
457
458static u32 asle_set_als_illum(struct drm_device *dev, u32 alsi)
459{
460 /* alsi is the current ALS reading in lux. 0 indicates below sensor
461 range, 0xffff indicates above sensor range. 1-0xfffe are valid */
e93d440b 462 DRM_DEBUG_DRIVER("Illum is not supported\n");
507c1a45 463 return ASLC_ALS_ILLUM_FAILED;
8ee1c3db
MG		 464}
465
466static u32 asle_set_pwm_freq(struct drm_device *dev, u32 pfmb)
467{
e93d440b 468 DRM_DEBUG_DRIVER("PWM freq is not supported\n");
507c1a45 469 return ASLC_PWM_FREQ_FAILED;
8ee1c3db
MG		 470}
471
472static u32 asle_set_pfit(struct drm_device *dev, u32 pfit)
473{
474 /* Panel fitting is currently controlled by the X code, so this is a
475 noop until modesetting support works fully */
e93d440b 476 DRM_DEBUG_DRIVER("Pfit is not supported\n");
507c1a45
PZ		 477 return ASLC_PFIT_FAILED;
478}
479
480static u32 asle_set_supported_rotation_angles(struct drm_device *dev, u32 srot)
481{
482 DRM_DEBUG_DRIVER("SROT is not supported\n");
483 return ASLC_ROTATION_ANGLES_FAILED;
484}
485
486static u32 asle_set_button_array(struct drm_device *dev, u32 iuer)
487{
488 if (!iuer)
489 DRM_DEBUG_DRIVER("Button array event is not supported (nothing)\n");
490 if (iuer & ASLE_IUER_ROTATION_LOCK_BTN)
491 DRM_DEBUG_DRIVER("Button array event is not supported (rotation lock)\n");
492 if (iuer & ASLE_IUER_VOLUME_DOWN_BTN)
493 DRM_DEBUG_DRIVER("Button array event is not supported (volume down)\n");
494 if (iuer & ASLE_IUER_VOLUME_UP_BTN)
495 DRM_DEBUG_DRIVER("Button array event is not supported (volume up)\n");
496 if (iuer & ASLE_IUER_WINDOWS_BTN)
497 DRM_DEBUG_DRIVER("Button array event is not supported (windows)\n");
498 if (iuer & ASLE_IUER_POWER_BTN)
499 DRM_DEBUG_DRIVER("Button array event is not supported (power)\n");
500
501 return ASLC_BUTTON_ARRAY_FAILED;
502}
503
504static u32 asle_set_convertible(struct drm_device *dev, u32 iuer)
505{
506 if (iuer & ASLE_IUER_CONVERTIBLE)
507 DRM_DEBUG_DRIVER("Convertible is not supported (clamshell)\n");
508 else
509 DRM_DEBUG_DRIVER("Convertible is not supported (slate)\n");
510
511 return ASLC_CONVERTIBLE_FAILED;
512}
513
514static u32 asle_set_docking(struct drm_device *dev, u32 iuer)
515{
516 if (iuer & ASLE_IUER_DOCKING)
517 DRM_DEBUG_DRIVER("Docking is not supported (docked)\n");
518 else
519 DRM_DEBUG_DRIVER("Docking is not supported (undocked)\n");
520
521 return ASLC_DOCKING_FAILED;
522}
523
524static u32 asle_isct_state(struct drm_device *dev)
525{
526 DRM_DEBUG_DRIVER("ISCT is not supported\n");
527 return ASLC_ISCT_STATE_FAILED;
8ee1c3db
MG		 528}
529
91a60f20 530static void asle_work(struct work_struct *work)
8ee1c3db 531{
91a60f20
JN		 532 struct intel_opregion *opregion =
533 container_of(work, struct intel_opregion, asle_work);
534 struct drm_i915_private *dev_priv =
535 container_of(opregion, struct drm_i915_private, opregion);
536 struct drm_device *dev = dev_priv->dev;
115719fc 537 struct opregion_asle *asle = dev_priv->opregion.asle;
507c1a45
PZ		 538 u32 aslc_stat = 0;
539 u32 aslc_req;
8ee1c3db
MG		 540
541 if (!asle)
542 return;
543
115719fc 544 aslc_req = asle->aslc;
8ee1c3db 545
507c1a45
PZ		 546 if (!(aslc_req & ASLC_REQ_MSK)) {
547 DRM_DEBUG_DRIVER("No request on ASLC interrupt 0x%08x\n",
548 aslc_req);
8ee1c3db
MG		 549 return;
550 }
551
507c1a45 552 if (aslc_req & ASLC_SET_ALS_ILLUM)
115719fc 553 aslc_stat |= asle_set_als_illum(dev, asle->alsi);
507c1a45
PZ		 554
555 if (aslc_req & ASLC_SET_BACKLIGHT)
115719fc 556 aslc_stat |= asle_set_backlight(dev, asle->bclp);
507c1a45
PZ		 557
558 if (aslc_req & ASLC_SET_PFIT)
115719fc 559 aslc_stat |= asle_set_pfit(dev, asle->pfit);
507c1a45
PZ		 560
561 if (aslc_req & ASLC_SET_PWM_FREQ)
115719fc 562 aslc_stat |= asle_set_pwm_freq(dev, asle->pfmb);
507c1a45
PZ		 563
564 if (aslc_req & ASLC_SUPPORTED_ROTATION_ANGLES)
565 aslc_stat |= asle_set_supported_rotation_angles(dev,
115719fc 566 asle->srot);
507c1a45
PZ		 567
568 if (aslc_req & ASLC_BUTTON_ARRAY)
115719fc 569 aslc_stat |= asle_set_button_array(dev, asle->iuer);
8ee1c3db 570
507c1a45 571 if (aslc_req & ASLC_CONVERTIBLE_INDICATOR)
115719fc 572 aslc_stat |= asle_set_convertible(dev, asle->iuer);
8ee1c3db 573
507c1a45 574 if (aslc_req & ASLC_DOCKING_INDICATOR)
115719fc 575 aslc_stat |= asle_set_docking(dev, asle->iuer);
8ee1c3db 576
507c1a45
PZ		 577 if (aslc_req & ASLC_ISCT_STATE_CHANGE)
578 aslc_stat |= asle_isct_state(dev);
8ee1c3db 579
115719fc 580 asle->aslc = aslc_stat;
8ee1c3db
MG		 581}
582
91a60f20
JN		 583void intel_opregion_asle_intr(struct drm_device *dev)
584{
585 struct drm_i915_private *dev_priv = dev->dev_private;
586
587 if (dev_priv->opregion.asle)
588 schedule_work(&dev_priv->opregion.asle_work);
589}
590
8ee1c3db
MG		 591#define ACPI_EV_DISPLAY_SWITCH (1<<0)
592#define ACPI_EV_LID (1<<1)
593#define ACPI_EV_DOCK (1<<2)
594
595static struct intel_opregion *system_opregion;
596
b358d0a6
HE		 597static int intel_opregion_video_event(struct notifier_block *nb,
598 unsigned long val, void *data)
8ee1c3db
MG		 599{
600 /* The only video events relevant to opregion are 0x80. These indicate
601 either a docking event, lid switch or display switch request. In
602 Linux, these are handled by the dock, button and video drivers.
f5a3d0c4 603 */
8ee1c3db 604
f5a3d0c4 605 struct acpi_bus_event *event = data;
115719fc 606 struct opregion_acpi *acpi;
f5a3d0c4
MG		 607 int ret = NOTIFY_OK;
608
609 if (strcmp(event->device_class, ACPI_VIDEO_CLASS) != 0)
610 return NOTIFY_DONE;
8ee1c3db
MG		 611
612 if (!system_opregion)
613 return NOTIFY_DONE;
614
615 acpi = system_opregion->acpi;
f5a3d0c4 616
115719fc 617 if (event->type == 0x80 && ((acpi->cevt & 1) == 0))
f5a3d0c4
MG		 618 ret = NOTIFY_BAD;
619
115719fc 620 acpi->csts = 0;
8ee1c3db 621
f5a3d0c4 622 return ret;
8ee1c3db
MG		 623}
624
625static struct notifier_block intel_opregion_notifier = {
626 .notifier_call = intel_opregion_video_event,
627};
628
74a365b3
MG		 629/*
630 * Initialise the DIDL field in opregion. This passes a list of devices to
631 * the firmware. Values are defined by section B.4.2 of the ACPI specification
632 * (version 3)
633 */
634
d5cbb22f
JN		 635static u32 get_did(struct intel_opregion *opregion, int i)
636{
637 u32 did;
638
639 if (i < ARRAY_SIZE(opregion->acpi->didl)) {
115719fc 640 did = opregion->acpi->didl[i];
d5cbb22f
JN		 641 } else {
642 i -= ARRAY_SIZE(opregion->acpi->didl);
643
644 if (WARN_ON(i >= ARRAY_SIZE(opregion->acpi->did2)))
645 return 0;
646
115719fc 647 did = opregion->acpi->did2[i];
d5cbb22f
JN		 648 }
649
650 return did;
651}
652
653static void set_did(struct intel_opregion *opregion, int i, u32 val)
654{
655 if (i < ARRAY_SIZE(opregion->acpi->didl)) {
115719fc 656 opregion->acpi->didl[i] = val;
d5cbb22f
JN		 657 } else {
658 i -= ARRAY_SIZE(opregion->acpi->didl);
659
660 if (WARN_ON(i >= ARRAY_SIZE(opregion->acpi->did2)))
661 return;
662
115719fc 663 opregion->acpi->did2[i] = val;
d5cbb22f
JN		 664 }
665}
666
74a365b3
MG		 667static void intel_didl_outputs(struct drm_device *dev)
668{
669 struct drm_i915_private *dev_priv = dev->dev_private;
670 struct intel_opregion *opregion = &dev_priv->opregion;
671 struct drm_connector *connector;
3143751f
ZR		 672 acpi_handle handle;
673 struct acpi_device *acpi_dev, *acpi_cdev, *acpi_video_bus = NULL;
674 unsigned long long device_id;
675 acpi_status status;
dfc2066d 676 u32 temp, max_outputs;
74a365b3
MG		 677 int i = 0;
678
3a83f992 679 handle = ACPI_HANDLE(&dev->pdev->dev);
7d37beaa 680 if (!handle || acpi_bus_get_device(handle, &acpi_dev))
3143751f
ZR		 681 return;
682
d4e1a692 683 if (acpi_is_video_device(handle))
3143751f
ZR		 684 acpi_video_bus = acpi_dev;
685 else {
686 list_for_each_entry(acpi_cdev, &acpi_dev->children, node) {
d4e1a692 687 if (acpi_is_video_device(acpi_cdev->handle)) {
3143751f
ZR		 688 acpi_video_bus = acpi_cdev;
689 break;
690 }
691 }
692 }
693
694 if (!acpi_video_bus) {
78c3d5fa 695 DRM_DEBUG_KMS("No ACPI video bus found\n");
3143751f
ZR		 696 return;
697 }
698
dfc2066d
JN		 699 /*
700 * In theory, did2, the extended didl, gets added at opregion version
701 * 3.0. In practice, however, we're supposed to set it for earlier
702 * versions as well, since a BIOS that doesn't understand did2 should
703 * not look at it anyway. Use a variable so we can tweak this if a need
704 * arises later.
705 */
706 max_outputs = ARRAY_SIZE(opregion->acpi->didl) +
707 ARRAY_SIZE(opregion->acpi->did2);
708
3143751f 709 list_for_each_entry(acpi_cdev, &acpi_video_bus->children, node) {
dfc2066d
JN		 710 if (i >= max_outputs) {
711 DRM_DEBUG_KMS("More than %u outputs detected via ACPI\n",
712 max_outputs);
3143751f
ZR		 713 return;
714 }
d5cbb22f
JN		 715 status = acpi_evaluate_integer(acpi_cdev->handle, "_ADR",
716 NULL, &device_id);
3143751f
ZR		 717 if (ACPI_SUCCESS(status)) {
718 if (!device_id)
719 goto blind_set;
d5cbb22f 720 set_did(opregion, i++, (u32)(device_id & 0x0f0f));
3143751f
ZR		 721 }
722 }
723
724end:
dfc2066d
JN		 725 DRM_DEBUG_KMS("%d outputs detected\n", i);
726
727 /* If fewer than max outputs, the list must be null terminated */
728 if (i < max_outputs)
d5cbb22f 729 set_did(opregion, i, 0);
3143751f
ZR		 730 return;
731
732blind_set:
733 i = 0;
74a365b3
MG		 734 list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
735 int output_type = ACPI_OTHER_OUTPUT;
dfc2066d
JN		 736 if (i >= max_outputs) {
737 DRM_DEBUG_KMS("More than %u outputs in connector list\n",
738 max_outputs);
74a365b3
MG		 739 return;
740 }
741 switch (connector->connector_type) {
742 case DRM_MODE_CONNECTOR_VGA:
743 case DRM_MODE_CONNECTOR_DVIA:
744 output_type = ACPI_VGA_OUTPUT;
745 break;
746 case DRM_MODE_CONNECTOR_Composite:
747 case DRM_MODE_CONNECTOR_SVIDEO:
748 case DRM_MODE_CONNECTOR_Component:
749 case DRM_MODE_CONNECTOR_9PinDIN:
750 output_type = ACPI_TV_OUTPUT;
751 break;
752 case DRM_MODE_CONNECTOR_DVII:
753 case DRM_MODE_CONNECTOR_DVID:
754 case DRM_MODE_CONNECTOR_DisplayPort:
755 case DRM_MODE_CONNECTOR_HDMIA:
756 case DRM_MODE_CONNECTOR_HDMIB:
757 output_type = ACPI_DIGITAL_OUTPUT;
758 break;
759 case DRM_MODE_CONNECTOR_LVDS:
760 output_type = ACPI_LVDS_OUTPUT;
761 break;
762 }
d5cbb22f
JN		 763 temp = get_did(opregion, i);
764 set_did(opregion, i, temp | (1 << 31) | output_type | i);
74a365b3
MG		 765 i++;
766 }
3143751f 767 goto end;
74a365b3
MG		 768}
769
d627b62f
L		 770static void intel_setup_cadls(struct drm_device *dev)
771{
772 struct drm_i915_private *dev_priv = dev->dev_private;
773 struct intel_opregion *opregion = &dev_priv->opregion;
774 int i = 0;
775 u32 disp_id;
776
777 /* Initialize the CADL field by duplicating the DIDL values.
778 * Technically, this is not always correct as display outputs may exist,
779 * but not active. This initialization is necessary for some Clevo
780 * laptops that check this field before processing the brightness and
781 * display switching hotkeys. Just like DIDL, CADL is NULL-terminated if
782 * there are less than eight devices. */
783 do {
d5cbb22f 784 disp_id = get_did(opregion, i);
115719fc 785 opregion->acpi->cadl[i] = disp_id;
d627b62f
L		 786 } while (++i < 8 && disp_id != 0);
787}
788
44834a67
CW		 789void intel_opregion_init(struct drm_device *dev)
790{
791 struct drm_i915_private *dev_priv = dev->dev_private;
792 struct intel_opregion *opregion = &dev_priv->opregion;
793
794 if (!opregion->header)
795 return;
796
797 if (opregion->acpi) {
3f52c6ed
DV		 798 intel_didl_outputs(dev);
799 intel_setup_cadls(dev);
44834a67
CW		 800
801 /* Notify BIOS we are ready to handle ACPI video ext notifs.
802 * Right now, all the events are handled by the ACPI video module.
803 * We don't actually need to do anything with them. */
115719fc
WD		 804 opregion->acpi->csts = 0;
805 opregion->acpi->drdy = 1;
44834a67
CW		 806
807 system_opregion = opregion;
808 register_acpi_notifier(&intel_opregion_notifier);
809 }
810
68bca4b0 811 if (opregion->asle) {
115719fc
WD		 812 opregion->asle->tche = ASLE_TCHE_BLC_EN;
813 opregion->asle->ardy = ASLE_ARDY_READY;
68bca4b0 814 }
44834a67
CW		 815}
816
817void intel_opregion_fini(struct drm_device *dev)
818{
819 struct drm_i915_private *dev_priv = dev->dev_private;
820 struct intel_opregion *opregion = &dev_priv->opregion;
821
822 if (!opregion->header)
823 return;
824
68bca4b0 825 if (opregion->asle)
115719fc 826 opregion->asle->ardy = ASLE_ARDY_NOT_READY;
68bca4b0 827
91a60f20
JN		 828 cancel_work_sync(&dev_priv->opregion.asle_work);
829
44834a67 830 if (opregion->acpi) {
115719fc 831 opregion->acpi->drdy = 0;
44834a67
CW		 832
833 system_opregion = NULL;
834 unregister_acpi_notifier(&intel_opregion_notifier);
835 }
836
837 /* just clear all opregion memory pointers now */
115719fc 838 memunmap(opregion->header);
04ebaadb
JN		 839 if (opregion->rvda) {
840 memunmap(opregion->rvda);
841 opregion->rvda = NULL;
842 }
44834a67
CW		 843 opregion->header = NULL;
844 opregion->acpi = NULL;
845 opregion->swsci = NULL;
846 opregion->asle = NULL;
847 opregion->vbt = NULL;
794a79a6 848 opregion->lid_state = NULL;
44834a67 849}
ebde53c7
JN		 850
851static void swsci_setup(struct drm_device *dev)
852{
853 struct drm_i915_private *dev_priv = dev->dev_private;
854 struct intel_opregion *opregion = &dev_priv->opregion;
855 bool requested_callbacks = false;
856 u32 tmp;
857
858 /* Sub-function code 0 is okay, let's allow them. */
859 opregion->swsci_gbda_sub_functions = 1;
860 opregion->swsci_sbcb_sub_functions = 1;
861
862 /* We use GBDA to ask for supported GBDA calls. */
863 if (swsci(dev, SWSCI_GBDA_SUPPORTED_CALLS, 0, &tmp) == 0) {
864 /* make the bits match the sub-function codes */
865 tmp <<= 1;
866 opregion->swsci_gbda_sub_functions |= tmp;
867 }
868
869 /*
870 * We also use GBDA to ask for _requested_ SBCB callbacks. The driver
871 * must not call interfaces that are not specifically requested by the
872 * bios.
873 */
874 if (swsci(dev, SWSCI_GBDA_REQUESTED_CALLBACKS, 0, &tmp) == 0) {
875 /* here, the bits already match sub-function codes */
876 opregion->swsci_sbcb_sub_functions |= tmp;
877 requested_callbacks = true;
878 }
879
880 /*
881 * But we use SBCB to ask for _supported_ SBCB calls. This does not mean
882 * the callback is _requested_. But we still can't call interfaces that
883 * are not requested.
884 */
885 if (swsci(dev, SWSCI_SBCB_SUPPORTED_CALLBACKS, 0, &tmp) == 0) {
886 /* make the bits match the sub-function codes */
887 u32 low = tmp & 0x7ff;
888 u32 high = tmp & ~0xfff; /* bit 11 is reserved */
889 tmp = (high << 4) | (low << 1) | 1;
890
891 /* best guess what to do with supported wrt requested */
892 if (requested_callbacks) {
893 u32 req = opregion->swsci_sbcb_sub_functions;
894 if ((req & tmp) != req)
895 DRM_DEBUG_DRIVER("SWSCI BIOS requested (%08x) SBCB callbacks that are not supported (%08x)\n", req, tmp);
896 /* XXX: for now, trust the requested callbacks */
897 /* opregion->swsci_sbcb_sub_functions &= tmp; */
898 } else {
899 opregion->swsci_sbcb_sub_functions |= tmp;
900 }
901 }
902
903 DRM_DEBUG_DRIVER("SWSCI GBDA callbacks %08x, SBCB callbacks %08x\n",
904 opregion->swsci_gbda_sub_functions,
905 opregion->swsci_sbcb_sub_functions);
906}
44834a67 907
b30581a4
JN		 908static int intel_no_opregion_vbt_callback(const struct dmi_system_id *id)
909{
910 DRM_DEBUG_KMS("Falling back to manually reading VBT from "
911 "VBIOS ROM for %s\n", id->ident);
912 return 1;
913}
914
915static const struct dmi_system_id intel_no_opregion_vbt[] = {
916 {
917 .callback = intel_no_opregion_vbt_callback,
918 .ident = "ThinkCentre A57",
919 .matches = {
920 DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
921 DMI_MATCH(DMI_PRODUCT_NAME, "97027RG"),
922 },
923 },
924 { }
925};
926
44834a67 927int intel_opregion_setup(struct drm_device *dev)
8ee1c3db
MG		 928{
929 struct drm_i915_private *dev_priv = dev->dev_private;
930 struct intel_opregion *opregion = &dev_priv->opregion;
8ee1c3db 931 u32 asls, mboxes;
5bc4418b 932 char buf[sizeof(OPREGION_SIGNATURE)];
8ee1c3db 933 int err = 0;
115719fc 934 void *base;
8ee1c3db 935
2d80391d
JN		 936 BUILD_BUG_ON(sizeof(struct opregion_header) != 0x100);
937 BUILD_BUG_ON(sizeof(struct opregion_acpi) != 0x100);
938 BUILD_BUG_ON(sizeof(struct opregion_swsci) != 0x100);
939 BUILD_BUG_ON(sizeof(struct opregion_asle) != 0x100);
b3cbd98b 940 BUILD_BUG_ON(sizeof(struct opregion_asle_ext) != 0x400);
2d80391d 941
8ee1c3db 942 pci_read_config_dword(dev->pdev, PCI_ASLS, &asls);
44d98a61 943 DRM_DEBUG_DRIVER("graphic opregion physical addr: 0x%x\n", asls);
8ee1c3db 944 if (asls == 0) {
44d98a61 945 DRM_DEBUG_DRIVER("ACPI OpRegion not supported!\n");
8ee1c3db
MG		 946 return -ENOTSUPP;
947 }
948
91a60f20
JN		 949 INIT_WORK(&opregion->asle_work, asle_work);
950
115719fc 951 base = memremap(asls, OPREGION_SIZE, MEMREMAP_WB);
8ee1c3db
MG		 952 if (!base)
953 return -ENOMEM;
954
115719fc 955 memcpy(buf, base, sizeof(buf));
5bc4418b
BW		 956
957 if (memcmp(buf, OPREGION_SIGNATURE, 16)) {
44d98a61 958 DRM_DEBUG_DRIVER("opregion signature mismatch\n");
8ee1c3db
MG		 959 err = -EINVAL;
960 goto err_out;
961 }
44834a67 962 opregion->header = base;
82d3c90c 963 opregion->lid_state = base + ACPI_CLID;
01fe9dbd 964
115719fc 965 mboxes = opregion->header->mboxes;
8ee1c3db 966 if (mboxes & MBOX_ACPI) {
44d98a61 967 DRM_DEBUG_DRIVER("Public ACPI methods supported\n");
8ee1c3db 968 opregion->acpi = base + OPREGION_ACPI_OFFSET;
8ee1c3db 969 }
8ee1c3db
MG		 970
971 if (mboxes & MBOX_SWSCI) {
44d98a61 972 DRM_DEBUG_DRIVER("SWSCI supported\n");
8ee1c3db 973 opregion->swsci = base + OPREGION_SWSCI_OFFSET;
ebde53c7 974 swsci_setup(dev);
8ee1c3db 975 }
b3cbd98b 976
8ee1c3db 977 if (mboxes & MBOX_ASLE) {
44d98a61 978 DRM_DEBUG_DRIVER("ASLE supported\n");
8ee1c3db 979 opregion->asle = base + OPREGION_ASLE_OFFSET;
68bca4b0 980
115719fc 981 opregion->asle->ardy = ASLE_ARDY_NOT_READY;
8ee1c3db
MG		 982 }
983
b3cbd98b
D		 984 if (mboxes & MBOX_ASLE_EXT)
985 DRM_DEBUG_DRIVER("ASLE extension supported\n");
986
f0067a31 987 if (!dmi_check_system(intel_no_opregion_vbt)) {
04ebaadb
JN		 988 const void *vbt = NULL;
989 u32 vbt_size = 0;
990
991 if (opregion->header->opregion_ver >= 2 && opregion->asle &&
992 opregion->asle->rvda && opregion->asle->rvds) {
993 opregion->rvda = memremap(opregion->asle->rvda,
994 opregion->asle->rvds,
995 MEMREMAP_WB);
996 vbt = opregion->rvda;
997 vbt_size = opregion->asle->rvds;
998 }
f0067a31
JN		 999
1000 if (intel_bios_is_valid_vbt(vbt, vbt_size)) {
04ebaadb 1001 DRM_DEBUG_KMS("Found valid VBT in ACPI OpRegion (RVDA)\n");
f0067a31 1002 opregion->vbt = vbt;
ada8f955 1003 opregion->vbt_size = vbt_size;
04ebaadb
JN		 1004 } else {
1005 vbt = base + OPREGION_VBT_OFFSET;
1006 vbt_size = OPREGION_ASLE_EXT_OFFSET - OPREGION_VBT_OFFSET;
1007 if (intel_bios_is_valid_vbt(vbt, vbt_size)) {
1008 DRM_DEBUG_KMS("Found valid VBT in ACPI OpRegion (Mailbox #4)\n");
1009 opregion->vbt = vbt;
1010 opregion->vbt_size = vbt_size;
1011 }
f0067a31
JN		 1012 }
1013 }
b30581a4 1014
8ee1c3db
MG		 1015 return 0;
1016
1017err_out:
115719fc 1018 memunmap(base);
8ee1c3db
MG		 1019 return err;
1020}
a0562819
VS		 1021
1022int
1023intel_opregion_get_panel_type(struct drm_device *dev)
1024{
1025 u32 panel_details;
1026 int ret;
1027
1028 ret = swsci(dev, SWSCI_GBDA_PANEL_DETAILS, 0x0, &panel_details);
1029 if (ret) {
1030 DRM_DEBUG_KMS("Failed to get panel details from OpRegion (%d)\n",
1031 ret);
1032 return ret;
1033 }
1034
1035 ret = (panel_details >> 8) & 0xff;
1036 if (ret > 0x10) {
1037 DRM_DEBUG_KMS("Invalid OpRegion panel type 0x%x\n", ret);
1038 return -EINVAL;
1039 }
1040
1041 /* fall back to VBT panel type? */
1042 if (ret == 0x0) {
1043 DRM_DEBUG_KMS("No panel type in OpRegion\n");
1044 return -ENODEV;
1045 }
1046
1047 return ret - 1;
1048}
Linux kernel - Deliverables
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