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drm/i915: Enable GSE interrupt on BDW+
[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
74a365b3
MG		 235#define ACPI_OTHER_OUTPUT (0<<8)
236#define ACPI_VGA_OUTPUT (1<<8)
237#define ACPI_TV_OUTPUT (2<<8)
238#define ACPI_DIGITAL_OUTPUT (3<<8)
239#define ACPI_LVDS_OUTPUT (4<<8)
240
bdde5c6a
JN		 241#define MAX_DSLP 1500
242
ebde53c7
JN		 243static int swsci(struct drm_device *dev, u32 function, u32 parm, u32 *parm_out)
244{
245 struct drm_i915_private *dev_priv = dev->dev_private;
115719fc 246 struct opregion_swsci *swsci = dev_priv->opregion.swsci;
ebde53c7 247 u32 main_function, sub_function, scic;
e10fa551 248 u16 swsci_val;
ebde53c7
JN		 249 u32 dslp;
250
251 if (!swsci)
252 return -ENODEV;
253
254 main_function = (function & SWSCI_SCIC_MAIN_FUNCTION_MASK) >>
255 SWSCI_SCIC_MAIN_FUNCTION_SHIFT;
256 sub_function = (function & SWSCI_SCIC_SUB_FUNCTION_MASK) >>
257 SWSCI_SCIC_SUB_FUNCTION_SHIFT;
258
259 /* Check if we can call the function. See swsci_setup for details. */
260 if (main_function == SWSCI_SBCB) {
261 if ((dev_priv->opregion.swsci_sbcb_sub_functions &
262 (1 << sub_function)) == 0)
263 return -EINVAL;
264 } else if (main_function == SWSCI_GBDA) {
265 if ((dev_priv->opregion.swsci_gbda_sub_functions &
266 (1 << sub_function)) == 0)
267 return -EINVAL;
268 }
269
270 /* Driver sleep timeout in ms. */
115719fc 271 dslp = swsci->dslp;
ebde53c7 272 if (!dslp) {
4994aa8c
PZ		 273 /* The spec says 2ms should be the default, but it's too small
274 * for some machines. */
275 dslp = 50;
bdde5c6a 276 } else if (dslp > MAX_DSLP) {
ebde53c7 277 /* Hey bios, trust must be earned. */
bdde5c6a
JN		 278 DRM_INFO_ONCE("ACPI BIOS requests an excessive sleep of %u ms, "
279 "using %u ms instead\n", dslp, MAX_DSLP);
280 dslp = MAX_DSLP;
ebde53c7
JN		 281 }
282
283 /* The spec tells us to do this, but we are the only user... */
115719fc 284 scic = swsci->scic;
ebde53c7
JN		 285 if (scic & SWSCI_SCIC_INDICATOR) {
286 DRM_DEBUG_DRIVER("SWSCI request already in progress\n");
287 return -EBUSY;
288 }
289
290 scic = function | SWSCI_SCIC_INDICATOR;
291
115719fc
WD		 292 swsci->parm = parm;
293 swsci->scic = scic;
ebde53c7
JN		 294
295 /* Ensure SCI event is selected and event trigger is cleared. */
e10fa551
JL		 296 pci_read_config_word(dev->pdev, SWSCI, &swsci_val);
297 if (!(swsci_val & SWSCI_SCISEL) || (swsci_val & SWSCI_GSSCIE)) {
298 swsci_val |= SWSCI_SCISEL;
299 swsci_val &= ~SWSCI_GSSCIE;
300 pci_write_config_word(dev->pdev, SWSCI, swsci_val);
ebde53c7
JN		 301 }
302
303 /* Use event trigger to tell bios to check the mail. */
e10fa551
JL		 304 swsci_val |= SWSCI_GSSCIE;
305 pci_write_config_word(dev->pdev, SWSCI, swsci_val);
ebde53c7
JN		 306
307 /* Poll for the result. */
115719fc 308#define C (((scic = swsci->scic) & SWSCI_SCIC_INDICATOR) == 0)
ebde53c7
JN		 309 if (wait_for(C, dslp)) {
310 DRM_DEBUG_DRIVER("SWSCI request timed out\n");
311 return -ETIMEDOUT;
312 }
313
314 scic = (scic & SWSCI_SCIC_EXIT_STATUS_MASK) >>
315 SWSCI_SCIC_EXIT_STATUS_SHIFT;
316
317 /* Note: scic == 0 is an error! */
318 if (scic != SWSCI_SCIC_EXIT_STATUS_SUCCESS) {
319 DRM_DEBUG_DRIVER("SWSCI request error %u\n", scic);
320 return -EIO;
321 }
322
323 if (parm_out)
115719fc 324 *parm_out = swsci->parm;
ebde53c7
JN		 325
326 return 0;
327
328#undef C
329}
330
9c4b0a68
JN		 331#define DISPLAY_TYPE_CRT 0
332#define DISPLAY_TYPE_TV 1
333#define DISPLAY_TYPE_EXTERNAL_FLAT_PANEL 2
334#define DISPLAY_TYPE_INTERNAL_FLAT_PANEL 3
335
336int intel_opregion_notify_encoder(struct intel_encoder *intel_encoder,
337 bool enable)
338{
339 struct drm_device *dev = intel_encoder->base.dev;
340 u32 parm = 0;
341 u32 type = 0;
342 u32 port;
343
344 /* don't care about old stuff for now */
345 if (!HAS_DDI(dev))
346 return 0;
347
7d4aefd0
SS		 348 if (intel_encoder->type == INTEL_OUTPUT_DSI)
349 port = 0;
350 else
351 port = intel_ddi_get_encoder_port(intel_encoder);
352
353 if (port == PORT_E) {
9c4b0a68
JN		 354 port = 0;
355 } else {
356 parm |= 1 << port;
357 port++;
358 }
359
360 if (!enable)
361 parm |= 4 << 8;
362
363 switch (intel_encoder->type) {
364 case INTEL_OUTPUT_ANALOG:
365 type = DISPLAY_TYPE_CRT;
366 break;
367 case INTEL_OUTPUT_UNKNOWN:
368 case INTEL_OUTPUT_DISPLAYPORT:
369 case INTEL_OUTPUT_HDMI:
0e32b39c 370 case INTEL_OUTPUT_DP_MST:
9c4b0a68
JN		 371 type = DISPLAY_TYPE_EXTERNAL_FLAT_PANEL;
372 break;
373 case INTEL_OUTPUT_EDP:
7d4aefd0 374 case INTEL_OUTPUT_DSI:
9c4b0a68
JN		 375 type = DISPLAY_TYPE_INTERNAL_FLAT_PANEL;
376 break;
377 default:
378 WARN_ONCE(1, "unsupported intel_encoder type %d\n",
379 intel_encoder->type);
380 return -EINVAL;
381 }
382
383 parm |= type << (16 + port * 3);
384
385 return swsci(dev, SWSCI_SBCB_DISPLAY_POWER_STATE, parm, NULL);
386}
387
ecbc5cf3
JN		 388static const struct {
389 pci_power_t pci_power_state;
390 u32 parm;
391} power_state_map[] = {
392 { PCI_D0, 0x00 },
393 { PCI_D1, 0x01 },
394 { PCI_D2, 0x02 },
395 { PCI_D3hot, 0x04 },
396 { PCI_D3cold, 0x04 },
397};
398
399int intel_opregion_notify_adapter(struct drm_device *dev, pci_power_t state)
400{
401 int i;
402
403 if (!HAS_DDI(dev))
404 return 0;
405
406 for (i = 0; i < ARRAY_SIZE(power_state_map); i++) {
407 if (state == power_state_map[i].pci_power_state)
408 return swsci(dev, SWSCI_SBCB_ADAPTER_POWER_STATE,
409 power_state_map[i].parm, NULL);
410 }
411
412 return -EINVAL;
413}
414
8ee1c3db
MG		 415static u32 asle_set_backlight(struct drm_device *dev, u32 bclp)
416{
417 struct drm_i915_private *dev_priv = dev->dev_private;
19c8054c 418 struct intel_connector *connector;
115719fc 419 struct opregion_asle *asle = dev_priv->opregion.asle;
8ee1c3db 420
749052fb
JN		 421 DRM_DEBUG_DRIVER("bclp = 0x%08x\n", bclp);
422
da882e5a 423 if (acpi_video_get_backlight_type() == acpi_backlight_native) {
0b9f7d93
AL		 424 DRM_DEBUG_KMS("opregion backlight request ignored\n");
425 return 0;
426 }
427
8ee1c3db 428 if (!(bclp & ASLE_BCLP_VALID))
507c1a45 429 return ASLC_BACKLIGHT_FAILED;
8ee1c3db
MG		 430
431 bclp &= ASLE_BCLP_MSK;
a9573556 432 if (bclp > 255)
507c1a45 433 return ASLC_BACKLIGHT_FAILED;
8ee1c3db 434
51fd371b 435 drm_modeset_lock(&dev->mode_config.connection_mutex, NULL);
c91c9f32 436
752aa88a 437 /*
c91c9f32
JN		 438 * Update backlight on all connectors that support backlight (usually
439 * only one).
752aa88a 440 */
540b5d02 441 DRM_DEBUG_KMS("updating opregion backlight %d/255\n", bclp);
19c8054c
JN		 442 for_each_intel_connector(dev, connector)
443 intel_panel_set_backlight_acpi(connector, bclp, 255);
115719fc 444 asle->cblv = DIV_ROUND_UP(bclp * 100, 255) | ASLE_CBLV_VALID;
8ee1c3db 445
51fd371b 446 drm_modeset_unlock(&dev->mode_config.connection_mutex);
752aa88a 447
c91c9f32
JN		 448
449 return 0;
8ee1c3db
MG		 450}
451
452static u32 asle_set_als_illum(struct drm_device *dev, u32 alsi)
453{
454 /* alsi is the current ALS reading in lux. 0 indicates below sensor
455 range, 0xffff indicates above sensor range. 1-0xfffe are valid */
e93d440b 456 DRM_DEBUG_DRIVER("Illum is not supported\n");
507c1a45 457 return ASLC_ALS_ILLUM_FAILED;
8ee1c3db
MG		 458}
459
460static u32 asle_set_pwm_freq(struct drm_device *dev, u32 pfmb)
461{
e93d440b 462 DRM_DEBUG_DRIVER("PWM freq is not supported\n");
507c1a45 463 return ASLC_PWM_FREQ_FAILED;
8ee1c3db
MG		 464}
465
466static u32 asle_set_pfit(struct drm_device *dev, u32 pfit)
467{
468 /* Panel fitting is currently controlled by the X code, so this is a
469 noop until modesetting support works fully */
e93d440b 470 DRM_DEBUG_DRIVER("Pfit is not supported\n");
507c1a45
PZ		 471 return ASLC_PFIT_FAILED;
472}
473
474static u32 asle_set_supported_rotation_angles(struct drm_device *dev, u32 srot)
475{
476 DRM_DEBUG_DRIVER("SROT is not supported\n");
477 return ASLC_ROTATION_ANGLES_FAILED;
478}
479
480static u32 asle_set_button_array(struct drm_device *dev, u32 iuer)
481{
482 if (!iuer)
483 DRM_DEBUG_DRIVER("Button array event is not supported (nothing)\n");
484 if (iuer & ASLE_IUER_ROTATION_LOCK_BTN)
485 DRM_DEBUG_DRIVER("Button array event is not supported (rotation lock)\n");
486 if (iuer & ASLE_IUER_VOLUME_DOWN_BTN)
487 DRM_DEBUG_DRIVER("Button array event is not supported (volume down)\n");
488 if (iuer & ASLE_IUER_VOLUME_UP_BTN)
489 DRM_DEBUG_DRIVER("Button array event is not supported (volume up)\n");
490 if (iuer & ASLE_IUER_WINDOWS_BTN)
491 DRM_DEBUG_DRIVER("Button array event is not supported (windows)\n");
492 if (iuer & ASLE_IUER_POWER_BTN)
493 DRM_DEBUG_DRIVER("Button array event is not supported (power)\n");
494
495 return ASLC_BUTTON_ARRAY_FAILED;
496}
497
498static u32 asle_set_convertible(struct drm_device *dev, u32 iuer)
499{
500 if (iuer & ASLE_IUER_CONVERTIBLE)
501 DRM_DEBUG_DRIVER("Convertible is not supported (clamshell)\n");
502 else
503 DRM_DEBUG_DRIVER("Convertible is not supported (slate)\n");
504
505 return ASLC_CONVERTIBLE_FAILED;
506}
507
508static u32 asle_set_docking(struct drm_device *dev, u32 iuer)
509{
510 if (iuer & ASLE_IUER_DOCKING)
511 DRM_DEBUG_DRIVER("Docking is not supported (docked)\n");
512 else
513 DRM_DEBUG_DRIVER("Docking is not supported (undocked)\n");
514
515 return ASLC_DOCKING_FAILED;
516}
517
518static u32 asle_isct_state(struct drm_device *dev)
519{
520 DRM_DEBUG_DRIVER("ISCT is not supported\n");
521 return ASLC_ISCT_STATE_FAILED;
8ee1c3db
MG		 522}
523
91a60f20 524static void asle_work(struct work_struct *work)
8ee1c3db 525{
91a60f20
JN		 526 struct intel_opregion *opregion =
527 container_of(work, struct intel_opregion, asle_work);
528 struct drm_i915_private *dev_priv =
529 container_of(opregion, struct drm_i915_private, opregion);
530 struct drm_device *dev = dev_priv->dev;
115719fc 531 struct opregion_asle *asle = dev_priv->opregion.asle;
507c1a45
PZ		 532 u32 aslc_stat = 0;
533 u32 aslc_req;
8ee1c3db
MG		 534
535 if (!asle)
536 return;
537
115719fc 538 aslc_req = asle->aslc;
8ee1c3db 539
507c1a45
PZ		 540 if (!(aslc_req & ASLC_REQ_MSK)) {
541 DRM_DEBUG_DRIVER("No request on ASLC interrupt 0x%08x\n",
542 aslc_req);
8ee1c3db
MG		 543 return;
544 }
545
507c1a45 546 if (aslc_req & ASLC_SET_ALS_ILLUM)
115719fc 547 aslc_stat |= asle_set_als_illum(dev, asle->alsi);
507c1a45
PZ		 548
549 if (aslc_req & ASLC_SET_BACKLIGHT)
115719fc 550 aslc_stat |= asle_set_backlight(dev, asle->bclp);
507c1a45
PZ		 551
552 if (aslc_req & ASLC_SET_PFIT)
115719fc 553 aslc_stat |= asle_set_pfit(dev, asle->pfit);
507c1a45
PZ		 554
555 if (aslc_req & ASLC_SET_PWM_FREQ)
115719fc 556 aslc_stat |= asle_set_pwm_freq(dev, asle->pfmb);
507c1a45
PZ		 557
558 if (aslc_req & ASLC_SUPPORTED_ROTATION_ANGLES)
559 aslc_stat |= asle_set_supported_rotation_angles(dev,
115719fc 560 asle->srot);
507c1a45
PZ		 561
562 if (aslc_req & ASLC_BUTTON_ARRAY)
115719fc 563 aslc_stat |= asle_set_button_array(dev, asle->iuer);
8ee1c3db 564
507c1a45 565 if (aslc_req & ASLC_CONVERTIBLE_INDICATOR)
115719fc 566 aslc_stat |= asle_set_convertible(dev, asle->iuer);
8ee1c3db 567
507c1a45 568 if (aslc_req & ASLC_DOCKING_INDICATOR)
115719fc 569 aslc_stat |= asle_set_docking(dev, asle->iuer);
8ee1c3db 570
507c1a45
PZ		 571 if (aslc_req & ASLC_ISCT_STATE_CHANGE)
572 aslc_stat |= asle_isct_state(dev);
8ee1c3db 573
115719fc 574 asle->aslc = aslc_stat;
8ee1c3db
MG		 575}
576
91d14251 577void intel_opregion_asle_intr(struct drm_i915_private *dev_priv)
91a60f20 578{
91a60f20
JN		 579 if (dev_priv->opregion.asle)
580 schedule_work(&dev_priv->opregion.asle_work);
581}
582
8ee1c3db
MG		 583#define ACPI_EV_DISPLAY_SWITCH (1<<0)
584#define ACPI_EV_LID (1<<1)
585#define ACPI_EV_DOCK (1<<2)
586
587static struct intel_opregion *system_opregion;
588
b358d0a6
HE		 589static int intel_opregion_video_event(struct notifier_block *nb,
590 unsigned long val, void *data)
8ee1c3db
MG		 591{
592 /* The only video events relevant to opregion are 0x80. These indicate
593 either a docking event, lid switch or display switch request. In
594 Linux, these are handled by the dock, button and video drivers.
f5a3d0c4 595 */
8ee1c3db 596
f5a3d0c4 597 struct acpi_bus_event *event = data;
115719fc 598 struct opregion_acpi *acpi;
f5a3d0c4
MG		 599 int ret = NOTIFY_OK;
600
601 if (strcmp(event->device_class, ACPI_VIDEO_CLASS) != 0)
602 return NOTIFY_DONE;
8ee1c3db
MG		 603
604 if (!system_opregion)
605 return NOTIFY_DONE;
606
607 acpi = system_opregion->acpi;
f5a3d0c4 608
115719fc 609 if (event->type == 0x80 && ((acpi->cevt & 1) == 0))
f5a3d0c4
MG		 610 ret = NOTIFY_BAD;
611
115719fc 612 acpi->csts = 0;
8ee1c3db 613
f5a3d0c4 614 return ret;
8ee1c3db
MG		 615}
616
617static struct notifier_block intel_opregion_notifier = {
618 .notifier_call = intel_opregion_video_event,
619};
620
74a365b3
MG		 621/*
622 * Initialise the DIDL field in opregion. This passes a list of devices to
623 * the firmware. Values are defined by section B.4.2 of the ACPI specification
624 * (version 3)
625 */
626
d5cbb22f
JN		 627static u32 get_did(struct intel_opregion *opregion, int i)
628{
629 u32 did;
630
631 if (i < ARRAY_SIZE(opregion->acpi->didl)) {
115719fc 632 did = opregion->acpi->didl[i];
d5cbb22f
JN		 633 } else {
634 i -= ARRAY_SIZE(opregion->acpi->didl);
635
636 if (WARN_ON(i >= ARRAY_SIZE(opregion->acpi->did2)))
637 return 0;
638
115719fc 639 did = opregion->acpi->did2[i];
d5cbb22f
JN		 640 }
641
642 return did;
643}
644
645static void set_did(struct intel_opregion *opregion, int i, u32 val)
646{
647 if (i < ARRAY_SIZE(opregion->acpi->didl)) {
115719fc 648 opregion->acpi->didl[i] = val;
d5cbb22f
JN		 649 } else {
650 i -= ARRAY_SIZE(opregion->acpi->didl);
651
652 if (WARN_ON(i >= ARRAY_SIZE(opregion->acpi->did2)))
653 return;
654
115719fc 655 opregion->acpi->did2[i] = val;
d5cbb22f
JN		 656 }
657}
658
74a365b3
MG		 659static void intel_didl_outputs(struct drm_device *dev)
660{
661 struct drm_i915_private *dev_priv = dev->dev_private;
662 struct intel_opregion *opregion = &dev_priv->opregion;
663 struct drm_connector *connector;
3143751f
ZR		 664 acpi_handle handle;
665 struct acpi_device *acpi_dev, *acpi_cdev, *acpi_video_bus = NULL;
666 unsigned long long device_id;
667 acpi_status status;
dfc2066d 668 u32 temp, max_outputs;
74a365b3
MG		 669 int i = 0;
670
3a83f992 671 handle = ACPI_HANDLE(&dev->pdev->dev);
7d37beaa 672 if (!handle || acpi_bus_get_device(handle, &acpi_dev))
3143751f
ZR		 673 return;
674
d4e1a692 675 if (acpi_is_video_device(handle))
3143751f
ZR		 676 acpi_video_bus = acpi_dev;
677 else {
678 list_for_each_entry(acpi_cdev, &acpi_dev->children, node) {
d4e1a692 679 if (acpi_is_video_device(acpi_cdev->handle)) {
3143751f
ZR		 680 acpi_video_bus = acpi_cdev;
681 break;
682 }
683 }
684 }
685
686 if (!acpi_video_bus) {
78c3d5fa 687 DRM_DEBUG_KMS("No ACPI video bus found\n");
3143751f
ZR		 688 return;
689 }
690
dfc2066d
JN		 691 /*
692 * In theory, did2, the extended didl, gets added at opregion version
693 * 3.0. In practice, however, we're supposed to set it for earlier
694 * versions as well, since a BIOS that doesn't understand did2 should
695 * not look at it anyway. Use a variable so we can tweak this if a need
696 * arises later.
697 */
698 max_outputs = ARRAY_SIZE(opregion->acpi->didl) +
699 ARRAY_SIZE(opregion->acpi->did2);
700
3143751f 701 list_for_each_entry(acpi_cdev, &acpi_video_bus->children, node) {
dfc2066d
JN		 702 if (i >= max_outputs) {
703 DRM_DEBUG_KMS("More than %u outputs detected via ACPI\n",
704 max_outputs);
3143751f
ZR		 705 return;
706 }
d5cbb22f
JN		 707 status = acpi_evaluate_integer(acpi_cdev->handle, "_ADR",
708 NULL, &device_id);
3143751f
ZR		 709 if (ACPI_SUCCESS(status)) {
710 if (!device_id)
711 goto blind_set;
d5cbb22f 712 set_did(opregion, i++, (u32)(device_id & 0x0f0f));
3143751f
ZR		 713 }
714 }
715
716end:
dfc2066d
JN		 717 DRM_DEBUG_KMS("%d outputs detected\n", i);
718
719 /* If fewer than max outputs, the list must be null terminated */
720 if (i < max_outputs)
d5cbb22f 721 set_did(opregion, i, 0);
3143751f
ZR		 722 return;
723
724blind_set:
725 i = 0;
74a365b3
MG		 726 list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
727 int output_type = ACPI_OTHER_OUTPUT;
dfc2066d
JN		 728 if (i >= max_outputs) {
729 DRM_DEBUG_KMS("More than %u outputs in connector list\n",
730 max_outputs);
74a365b3
MG		 731 return;
732 }
733 switch (connector->connector_type) {
734 case DRM_MODE_CONNECTOR_VGA:
735 case DRM_MODE_CONNECTOR_DVIA:
736 output_type = ACPI_VGA_OUTPUT;
737 break;
738 case DRM_MODE_CONNECTOR_Composite:
739 case DRM_MODE_CONNECTOR_SVIDEO:
740 case DRM_MODE_CONNECTOR_Component:
741 case DRM_MODE_CONNECTOR_9PinDIN:
742 output_type = ACPI_TV_OUTPUT;
743 break;
744 case DRM_MODE_CONNECTOR_DVII:
745 case DRM_MODE_CONNECTOR_DVID:
746 case DRM_MODE_CONNECTOR_DisplayPort:
747 case DRM_MODE_CONNECTOR_HDMIA:
748 case DRM_MODE_CONNECTOR_HDMIB:
749 output_type = ACPI_DIGITAL_OUTPUT;
750 break;
751 case DRM_MODE_CONNECTOR_LVDS:
752 output_type = ACPI_LVDS_OUTPUT;
753 break;
754 }
d5cbb22f
JN		 755 temp = get_did(opregion, i);
756 set_did(opregion, i, temp | (1 << 31) | output_type | i);
74a365b3
MG		 757 i++;
758 }
3143751f 759 goto end;
74a365b3
MG		 760}
761
d627b62f
L		 762static void intel_setup_cadls(struct drm_device *dev)
763{
764 struct drm_i915_private *dev_priv = dev->dev_private;
765 struct intel_opregion *opregion = &dev_priv->opregion;
766 int i = 0;
767 u32 disp_id;
768
769 /* Initialize the CADL field by duplicating the DIDL values.
770 * Technically, this is not always correct as display outputs may exist,
771 * but not active. This initialization is necessary for some Clevo
772 * laptops that check this field before processing the brightness and
773 * display switching hotkeys. Just like DIDL, CADL is NULL-terminated if
774 * there are less than eight devices. */
775 do {
d5cbb22f 776 disp_id = get_did(opregion, i);
115719fc 777 opregion->acpi->cadl[i] = disp_id;
d627b62f
L		 778 } while (++i < 8 && disp_id != 0);
779}
780
44834a67
CW		 781void intel_opregion_init(struct drm_device *dev)
782{
783 struct drm_i915_private *dev_priv = dev->dev_private;
784 struct intel_opregion *opregion = &dev_priv->opregion;
785
786 if (!opregion->header)
787 return;
788
789 if (opregion->acpi) {
3f52c6ed
DV		 790 intel_didl_outputs(dev);
791 intel_setup_cadls(dev);
44834a67
CW		 792
793 /* Notify BIOS we are ready to handle ACPI video ext notifs.
794 * Right now, all the events are handled by the ACPI video module.
795 * We don't actually need to do anything with them. */
115719fc
WD		 796 opregion->acpi->csts = 0;
797 opregion->acpi->drdy = 1;
44834a67
CW		 798
799 system_opregion = opregion;
800 register_acpi_notifier(&intel_opregion_notifier);
801 }
802
68bca4b0 803 if (opregion->asle) {
115719fc
WD		 804 opregion->asle->tche = ASLE_TCHE_BLC_EN;
805 opregion->asle->ardy = ASLE_ARDY_READY;
68bca4b0 806 }
44834a67
CW		 807}
808
809void intel_opregion_fini(struct drm_device *dev)
810{
811 struct drm_i915_private *dev_priv = dev->dev_private;
812 struct intel_opregion *opregion = &dev_priv->opregion;
813
814 if (!opregion->header)
815 return;
816
68bca4b0 817 if (opregion->asle)
115719fc 818 opregion->asle->ardy = ASLE_ARDY_NOT_READY;
68bca4b0 819
91a60f20
JN		 820 cancel_work_sync(&dev_priv->opregion.asle_work);
821
44834a67 822 if (opregion->acpi) {
115719fc 823 opregion->acpi->drdy = 0;
44834a67
CW		 824
825 system_opregion = NULL;
826 unregister_acpi_notifier(&intel_opregion_notifier);
827 }
828
829 /* just clear all opregion memory pointers now */
115719fc 830 memunmap(opregion->header);
04ebaadb
JN		 831 if (opregion->rvda) {
832 memunmap(opregion->rvda);
833 opregion->rvda = NULL;
834 }
44834a67
CW		 835 opregion->header = NULL;
836 opregion->acpi = NULL;
837 opregion->swsci = NULL;
838 opregion->asle = NULL;
839 opregion->vbt = NULL;
794a79a6 840 opregion->lid_state = NULL;
44834a67 841}
ebde53c7
JN		 842
843static void swsci_setup(struct drm_device *dev)
844{
845 struct drm_i915_private *dev_priv = dev->dev_private;
846 struct intel_opregion *opregion = &dev_priv->opregion;
847 bool requested_callbacks = false;
848 u32 tmp;
849
850 /* Sub-function code 0 is okay, let's allow them. */
851 opregion->swsci_gbda_sub_functions = 1;
852 opregion->swsci_sbcb_sub_functions = 1;
853
854 /* We use GBDA to ask for supported GBDA calls. */
855 if (swsci(dev, SWSCI_GBDA_SUPPORTED_CALLS, 0, &tmp) == 0) {
856 /* make the bits match the sub-function codes */
857 tmp <<= 1;
858 opregion->swsci_gbda_sub_functions |= tmp;
859 }
860
861 /*
862 * We also use GBDA to ask for _requested_ SBCB callbacks. The driver
863 * must not call interfaces that are not specifically requested by the
864 * bios.
865 */
866 if (swsci(dev, SWSCI_GBDA_REQUESTED_CALLBACKS, 0, &tmp) == 0) {
867 /* here, the bits already match sub-function codes */
868 opregion->swsci_sbcb_sub_functions |= tmp;
869 requested_callbacks = true;
870 }
871
872 /*
873 * But we use SBCB to ask for _supported_ SBCB calls. This does not mean
874 * the callback is _requested_. But we still can't call interfaces that
875 * are not requested.
876 */
877 if (swsci(dev, SWSCI_SBCB_SUPPORTED_CALLBACKS, 0, &tmp) == 0) {
878 /* make the bits match the sub-function codes */
879 u32 low = tmp & 0x7ff;
880 u32 high = tmp & ~0xfff; /* bit 11 is reserved */
881 tmp = (high << 4) | (low << 1) | 1;
882
883 /* best guess what to do with supported wrt requested */
884 if (requested_callbacks) {
885 u32 req = opregion->swsci_sbcb_sub_functions;
886 if ((req & tmp) != req)
887 DRM_DEBUG_DRIVER("SWSCI BIOS requested (%08x) SBCB callbacks that are not supported (%08x)\n", req, tmp);
888 /* XXX: for now, trust the requested callbacks */
889 /* opregion->swsci_sbcb_sub_functions &= tmp; */
890 } else {
891 opregion->swsci_sbcb_sub_functions |= tmp;
892 }
893 }
894
895 DRM_DEBUG_DRIVER("SWSCI GBDA callbacks %08x, SBCB callbacks %08x\n",
896 opregion->swsci_gbda_sub_functions,
897 opregion->swsci_sbcb_sub_functions);
898}
44834a67 899
b30581a4
JN		 900static int intel_no_opregion_vbt_callback(const struct dmi_system_id *id)
901{
902 DRM_DEBUG_KMS("Falling back to manually reading VBT from "
903 "VBIOS ROM for %s\n", id->ident);
904 return 1;
905}
906
907static const struct dmi_system_id intel_no_opregion_vbt[] = {
908 {
909 .callback = intel_no_opregion_vbt_callback,
910 .ident = "ThinkCentre A57",
911 .matches = {
912 DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
913 DMI_MATCH(DMI_PRODUCT_NAME, "97027RG"),
914 },
915 },
916 { }
917};
918
44834a67 919int intel_opregion_setup(struct drm_device *dev)
8ee1c3db
MG		 920{
921 struct drm_i915_private *dev_priv = dev->dev_private;
922 struct intel_opregion *opregion = &dev_priv->opregion;
8ee1c3db 923 u32 asls, mboxes;
5bc4418b 924 char buf[sizeof(OPREGION_SIGNATURE)];
8ee1c3db 925 int err = 0;
115719fc 926 void *base;
8ee1c3db 927
2d80391d
JN		 928 BUILD_BUG_ON(sizeof(struct opregion_header) != 0x100);
929 BUILD_BUG_ON(sizeof(struct opregion_acpi) != 0x100);
930 BUILD_BUG_ON(sizeof(struct opregion_swsci) != 0x100);
931 BUILD_BUG_ON(sizeof(struct opregion_asle) != 0x100);
b3cbd98b 932 BUILD_BUG_ON(sizeof(struct opregion_asle_ext) != 0x400);
2d80391d 933
e10fa551 934 pci_read_config_dword(dev->pdev, ASLS, &asls);
44d98a61 935 DRM_DEBUG_DRIVER("graphic opregion physical addr: 0x%x\n", asls);
8ee1c3db 936 if (asls == 0) {
44d98a61 937 DRM_DEBUG_DRIVER("ACPI OpRegion not supported!\n");
8ee1c3db
MG		 938 return -ENOTSUPP;
939 }
940
91a60f20
JN		 941 INIT_WORK(&opregion->asle_work, asle_work);
942
115719fc 943 base = memremap(asls, OPREGION_SIZE, MEMREMAP_WB);
8ee1c3db
MG		 944 if (!base)
945 return -ENOMEM;
946
115719fc 947 memcpy(buf, base, sizeof(buf));
5bc4418b
BW		 948
949 if (memcmp(buf, OPREGION_SIGNATURE, 16)) {
44d98a61 950 DRM_DEBUG_DRIVER("opregion signature mismatch\n");
8ee1c3db
MG		 951 err = -EINVAL;
952 goto err_out;
953 }
44834a67 954 opregion->header = base;
82d3c90c 955 opregion->lid_state = base + ACPI_CLID;
01fe9dbd 956
115719fc 957 mboxes = opregion->header->mboxes;
8ee1c3db 958 if (mboxes & MBOX_ACPI) {
44d98a61 959 DRM_DEBUG_DRIVER("Public ACPI methods supported\n");
8ee1c3db 960 opregion->acpi = base + OPREGION_ACPI_OFFSET;
8ee1c3db 961 }
8ee1c3db
MG		 962
963 if (mboxes & MBOX_SWSCI) {
44d98a61 964 DRM_DEBUG_DRIVER("SWSCI supported\n");
8ee1c3db 965 opregion->swsci = base + OPREGION_SWSCI_OFFSET;
ebde53c7 966 swsci_setup(dev);
8ee1c3db 967 }
b3cbd98b 968
8ee1c3db 969 if (mboxes & MBOX_ASLE) {
44d98a61 970 DRM_DEBUG_DRIVER("ASLE supported\n");
8ee1c3db 971 opregion->asle = base + OPREGION_ASLE_OFFSET;
68bca4b0 972
115719fc 973 opregion->asle->ardy = ASLE_ARDY_NOT_READY;
8ee1c3db
MG		 974 }
975
b3cbd98b
D		 976 if (mboxes & MBOX_ASLE_EXT)
977 DRM_DEBUG_DRIVER("ASLE extension supported\n");
978
f0067a31 979 if (!dmi_check_system(intel_no_opregion_vbt)) {
04ebaadb
JN		 980 const void *vbt = NULL;
981 u32 vbt_size = 0;
982
983 if (opregion->header->opregion_ver >= 2 && opregion->asle &&
984 opregion->asle->rvda && opregion->asle->rvds) {
985 opregion->rvda = memremap(opregion->asle->rvda,
986 opregion->asle->rvds,
987 MEMREMAP_WB);
988 vbt = opregion->rvda;
989 vbt_size = opregion->asle->rvds;
990 }
f0067a31
JN		 991
992 if (intel_bios_is_valid_vbt(vbt, vbt_size)) {
04ebaadb 993 DRM_DEBUG_KMS("Found valid VBT in ACPI OpRegion (RVDA)\n");
f0067a31 994 opregion->vbt = vbt;
ada8f955 995 opregion->vbt_size = vbt_size;
04ebaadb
JN		 996 } else {
997 vbt = base + OPREGION_VBT_OFFSET;
998 vbt_size = OPREGION_ASLE_EXT_OFFSET - OPREGION_VBT_OFFSET;
999 if (intel_bios_is_valid_vbt(vbt, vbt_size)) {
1000 DRM_DEBUG_KMS("Found valid VBT in ACPI OpRegion (Mailbox #4)\n");
1001 opregion->vbt = vbt;
1002 opregion->vbt_size = vbt_size;
1003 }
f0067a31
JN		 1004 }
1005 }
b30581a4 1006
8ee1c3db
MG		 1007 return 0;
1008
1009err_out:
115719fc 1010 memunmap(base);
8ee1c3db
MG		 1011 return err;
1012}
a0562819
VS		 1013
1014int
1015intel_opregion_get_panel_type(struct drm_device *dev)
1016{
1017 u32 panel_details;
1018 int ret;
1019
1020 ret = swsci(dev, SWSCI_GBDA_PANEL_DETAILS, 0x0, &panel_details);
1021 if (ret) {
1022 DRM_DEBUG_KMS("Failed to get panel details from OpRegion (%d)\n",
1023 ret);
1024 return ret;
1025 }
1026
1027 ret = (panel_details >> 8) & 0xff;
1028 if (ret > 0x10) {
1029 DRM_DEBUG_KMS("Invalid OpRegion panel type 0x%x\n", ret);
1030 return -EINVAL;
1031 }
1032
1033 /* fall back to VBT panel type? */
1034 if (ret == 0x0) {
1035 DRM_DEBUG_KMS("No panel type in OpRegion\n");
1036 return -ENODEV;
1037 }
1038
1039 return ret - 1;
1040}
Linux 6.x block layer and io_uring tree(s)