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drm/i915: rename INSTDONE1 to GEN4_INSTDONE1
[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>
74a365b3 29#include <acpi/video.h>
8ee1c3db 30
760285e7
DH		 31#include <drm/drmP.h>
32#include <drm/i915_drm.h>
8ee1c3db 33#include "i915_drv.h"
a9573556 34#include "intel_drv.h"
8ee1c3db 35
ebde53c7
JN		 36#define PCI_ASLE 0xe4
37#define PCI_ASLS 0xfc
38#define PCI_SWSCI 0xe8
39#define PCI_SWSCI_SCISEL (1 << 15)
40#define PCI_SWSCI_GSSCIE (1 << 0)
8ee1c3db 41
8ee1c3db
MG		 42#define OPREGION_HEADER_OFFSET 0
43#define OPREGION_ACPI_OFFSET 0x100
82d3c90c
CW		 44#define ACPI_CLID 0x01ac /* current lid state indicator */
45#define ACPI_CDCK 0x01b0 /* current docking state indicator */
8ee1c3db
MG		 46#define OPREGION_SWSCI_OFFSET 0x200
47#define OPREGION_ASLE_OFFSET 0x300
44834a67 48#define OPREGION_VBT_OFFSET 0x400
8ee1c3db
MG		 49
50#define OPREGION_SIGNATURE "IntelGraphicsMem"
51#define MBOX_ACPI (1<<0)
52#define MBOX_SWSCI (1<<1)
53#define MBOX_ASLE (1<<2)
f6a430d8 54#define MBOX_ASLE_EXT (1<<4)
8ee1c3db
MG		 55
56struct opregion_header {
0206e353
AJ		 57 u8 signature[16];
58 u32 size;
59 u32 opregion_ver;
60 u8 bios_ver[32];
61 u8 vbios_ver[16];
62 u8 driver_ver[16];
63 u32 mboxes;
f6a430d8
JN		 64 u32 driver_model;
65 u32 pcon;
66 u8 dver[32];
67 u8 rsvd[124];
e4451239 68} __packed;
8ee1c3db
MG		 69
70/* OpRegion mailbox #1: public ACPI methods */
71struct opregion_acpi {
0206e353
AJ		 72 u32 drdy; /* driver readiness */
73 u32 csts; /* notification status */
74 u32 cevt; /* current event */
75 u8 rsvd1[20];
76 u32 didl[8]; /* supported display devices ID list */
77 u32 cpdl[8]; /* currently presented display list */
78 u32 cadl[8]; /* currently active display list */
79 u32 nadl[8]; /* next active devices list */
80 u32 aslp; /* ASL sleep time-out */
81 u32 tidx; /* toggle table index */
82 u32 chpd; /* current hotplug enable indicator */
83 u32 clid; /* current lid state*/
84 u32 cdck; /* current docking state */
85 u32 sxsw; /* Sx state resume */
86 u32 evts; /* ASL supported events */
87 u32 cnot; /* current OS notification */
88 u32 nrdy; /* driver status */
f6a430d8
JN		 89 u32 did2[7]; /* extended supported display devices ID list */
90 u32 cpd2[7]; /* extended attached display devices list */
91 u8 rsvd2[4];
e4451239 92} __packed;
8ee1c3db
MG		 93
94/* OpRegion mailbox #2: SWSCI */
95struct opregion_swsci {
0206e353
AJ		 96 u32 scic; /* SWSCI command|status|data */
97 u32 parm; /* command parameters */
98 u32 dslp; /* driver sleep time-out */
99 u8 rsvd[244];
e4451239 100} __packed;
8ee1c3db
MG		 101
102/* OpRegion mailbox #3: ASLE */
103struct opregion_asle {
0206e353
AJ		 104 u32 ardy; /* driver readiness */
105 u32 aslc; /* ASLE interrupt command */
106 u32 tche; /* technology enabled indicator */
107 u32 alsi; /* current ALS illuminance reading */
108 u32 bclp; /* backlight brightness to set */
109 u32 pfit; /* panel fitting state */
110 u32 cblv; /* current brightness level */
111 u16 bclm[20]; /* backlight level duty cycle mapping table */
112 u32 cpfm; /* current panel fitting mode */
113 u32 epfm; /* enabled panel fitting modes */
114 u8 plut[74]; /* panel LUT and identifier */
115 u32 pfmb; /* PWM freq and min brightness */
507c1a45
PZ		 116 u32 cddv; /* color correction default values */
117 u32 pcft; /* power conservation features */
118 u32 srot; /* supported rotation angles */
119 u32 iuer; /* IUER events */
f6a430d8
JN		 120 u64 fdss;
121 u32 fdsp;
122 u32 stat;
123 u8 rsvd[70];
e4451239 124} __packed;
8ee1c3db 125
68bca4b0
JN		 126/* Driver readiness indicator */
127#define ASLE_ARDY_READY (1 << 0)
128#define ASLE_ARDY_NOT_READY (0 << 0)
129
507c1a45
PZ		 130/* ASLE Interrupt Command (ASLC) bits */
131#define ASLC_SET_ALS_ILLUM (1 << 0)
132#define ASLC_SET_BACKLIGHT (1 << 1)
133#define ASLC_SET_PFIT (1 << 2)
134#define ASLC_SET_PWM_FREQ (1 << 3)
135#define ASLC_SUPPORTED_ROTATION_ANGLES (1 << 4)
136#define ASLC_BUTTON_ARRAY (1 << 5)
137#define ASLC_CONVERTIBLE_INDICATOR (1 << 6)
138#define ASLC_DOCKING_INDICATOR (1 << 7)
139#define ASLC_ISCT_STATE_CHANGE (1 << 8)
140#define ASLC_REQ_MSK 0x1ff
141/* response bits */
142#define ASLC_ALS_ILLUM_FAILED (1 << 10)
143#define ASLC_BACKLIGHT_FAILED (1 << 12)
144#define ASLC_PFIT_FAILED (1 << 14)
145#define ASLC_PWM_FREQ_FAILED (1 << 16)
146#define ASLC_ROTATION_ANGLES_FAILED (1 << 18)
147#define ASLC_BUTTON_ARRAY_FAILED (1 << 20)
148#define ASLC_CONVERTIBLE_FAILED (1 << 22)
149#define ASLC_DOCKING_FAILED (1 << 24)
150#define ASLC_ISCT_STATE_FAILED (1 << 26)
8ee1c3db 151
f599cc29
JN		 152/* Technology enabled indicator */
153#define ASLE_TCHE_ALS_EN (1 << 0)
154#define ASLE_TCHE_BLC_EN (1 << 1)
155#define ASLE_TCHE_PFIT_EN (1 << 2)
156#define ASLE_TCHE_PFMB_EN (1 << 3)
157
8ee1c3db
MG		 158/* ASLE backlight brightness to set */
159#define ASLE_BCLP_VALID (1<<31)
160#define ASLE_BCLP_MSK (~(1<<31))
161
162/* ASLE panel fitting request */
163#define ASLE_PFIT_VALID (1<<31)
164#define ASLE_PFIT_CENTER (1<<0)
165#define ASLE_PFIT_STRETCH_TEXT (1<<1)
166#define ASLE_PFIT_STRETCH_GFX (1<<2)
167
168/* PWM frequency and minimum brightness */
169#define ASLE_PFMB_BRIGHTNESS_MASK (0xff)
170#define ASLE_PFMB_BRIGHTNESS_VALID (1<<8)
171#define ASLE_PFMB_PWM_MASK (0x7ffffe00)
172#define ASLE_PFMB_PWM_VALID (1<<31)
173
174#define ASLE_CBLV_VALID (1<<31)
175
507c1a45
PZ		 176/* IUER */
177#define ASLE_IUER_DOCKING (1 << 7)
178#define ASLE_IUER_CONVERTIBLE (1 << 6)
179#define ASLE_IUER_ROTATION_LOCK_BTN (1 << 4)
180#define ASLE_IUER_VOLUME_DOWN_BTN (1 << 3)
181#define ASLE_IUER_VOLUME_UP_BTN (1 << 2)
182#define ASLE_IUER_WINDOWS_BTN (1 << 1)
183#define ASLE_IUER_POWER_BTN (1 << 0)
184
ebde53c7
JN		 185/* Software System Control Interrupt (SWSCI) */
186#define SWSCI_SCIC_INDICATOR (1 << 0)
187#define SWSCI_SCIC_MAIN_FUNCTION_SHIFT 1
188#define SWSCI_SCIC_MAIN_FUNCTION_MASK (0xf << 1)
189#define SWSCI_SCIC_SUB_FUNCTION_SHIFT 8
190#define SWSCI_SCIC_SUB_FUNCTION_MASK (0xff << 8)
191#define SWSCI_SCIC_EXIT_PARAMETER_SHIFT 8
192#define SWSCI_SCIC_EXIT_PARAMETER_MASK (0xff << 8)
193#define SWSCI_SCIC_EXIT_STATUS_SHIFT 5
194#define SWSCI_SCIC_EXIT_STATUS_MASK (7 << 5)
195#define SWSCI_SCIC_EXIT_STATUS_SUCCESS 1
196
197#define SWSCI_FUNCTION_CODE(main, sub) \
198 ((main) << SWSCI_SCIC_MAIN_FUNCTION_SHIFT | \
199 (sub) << SWSCI_SCIC_SUB_FUNCTION_SHIFT)
200
201/* SWSCI: Get BIOS Data (GBDA) */
202#define SWSCI_GBDA 4
203#define SWSCI_GBDA_SUPPORTED_CALLS SWSCI_FUNCTION_CODE(SWSCI_GBDA, 0)
204#define SWSCI_GBDA_REQUESTED_CALLBACKS SWSCI_FUNCTION_CODE(SWSCI_GBDA, 1)
205#define SWSCI_GBDA_BOOT_DISPLAY_PREF SWSCI_FUNCTION_CODE(SWSCI_GBDA, 4)
206#define SWSCI_GBDA_PANEL_DETAILS SWSCI_FUNCTION_CODE(SWSCI_GBDA, 5)
207#define SWSCI_GBDA_TV_STANDARD SWSCI_FUNCTION_CODE(SWSCI_GBDA, 6)
208#define SWSCI_GBDA_INTERNAL_GRAPHICS SWSCI_FUNCTION_CODE(SWSCI_GBDA, 7)
209#define SWSCI_GBDA_SPREAD_SPECTRUM SWSCI_FUNCTION_CODE(SWSCI_GBDA, 10)
210
211/* SWSCI: System BIOS Callbacks (SBCB) */
212#define SWSCI_SBCB 6
213#define SWSCI_SBCB_SUPPORTED_CALLBACKS SWSCI_FUNCTION_CODE(SWSCI_SBCB, 0)
214#define SWSCI_SBCB_INIT_COMPLETION SWSCI_FUNCTION_CODE(SWSCI_SBCB, 1)
215#define SWSCI_SBCB_PRE_HIRES_SET_MODE SWSCI_FUNCTION_CODE(SWSCI_SBCB, 3)
216#define SWSCI_SBCB_POST_HIRES_SET_MODE SWSCI_FUNCTION_CODE(SWSCI_SBCB, 4)
217#define SWSCI_SBCB_DISPLAY_SWITCH SWSCI_FUNCTION_CODE(SWSCI_SBCB, 5)
218#define SWSCI_SBCB_SET_TV_FORMAT SWSCI_FUNCTION_CODE(SWSCI_SBCB, 6)
219#define SWSCI_SBCB_ADAPTER_POWER_STATE SWSCI_FUNCTION_CODE(SWSCI_SBCB, 7)
220#define SWSCI_SBCB_DISPLAY_POWER_STATE SWSCI_FUNCTION_CODE(SWSCI_SBCB, 8)
221#define SWSCI_SBCB_SET_BOOT_DISPLAY SWSCI_FUNCTION_CODE(SWSCI_SBCB, 9)
222#define SWSCI_SBCB_SET_PANEL_DETAILS SWSCI_FUNCTION_CODE(SWSCI_SBCB, 10)
223#define SWSCI_SBCB_SET_INTERNAL_GFX SWSCI_FUNCTION_CODE(SWSCI_SBCB, 11)
224#define SWSCI_SBCB_POST_HIRES_TO_DOS_FS SWSCI_FUNCTION_CODE(SWSCI_SBCB, 16)
225#define SWSCI_SBCB_SUSPEND_RESUME SWSCI_FUNCTION_CODE(SWSCI_SBCB, 17)
226#define SWSCI_SBCB_SET_SPREAD_SPECTRUM SWSCI_FUNCTION_CODE(SWSCI_SBCB, 18)
227#define SWSCI_SBCB_POST_VBE_PM SWSCI_FUNCTION_CODE(SWSCI_SBCB, 19)
228#define SWSCI_SBCB_ENABLE_DISABLE_AUDIO SWSCI_FUNCTION_CODE(SWSCI_SBCB, 21)
229
74a365b3
MG		 230#define ACPI_OTHER_OUTPUT (0<<8)
231#define ACPI_VGA_OUTPUT (1<<8)
232#define ACPI_TV_OUTPUT (2<<8)
233#define ACPI_DIGITAL_OUTPUT (3<<8)
234#define ACPI_LVDS_OUTPUT (4<<8)
235
bdde5c6a
JN		 236#define MAX_DSLP 1500
237
44834a67 238#ifdef CONFIG_ACPI
ebde53c7
JN		 239static int swsci(struct drm_device *dev, u32 function, u32 parm, u32 *parm_out)
240{
241 struct drm_i915_private *dev_priv = dev->dev_private;
242 struct opregion_swsci __iomem *swsci = dev_priv->opregion.swsci;
243 u32 main_function, sub_function, scic;
244 u16 pci_swsci;
245 u32 dslp;
246
247 if (!swsci)
248 return -ENODEV;
249
250 main_function = (function & SWSCI_SCIC_MAIN_FUNCTION_MASK) >>
251 SWSCI_SCIC_MAIN_FUNCTION_SHIFT;
252 sub_function = (function & SWSCI_SCIC_SUB_FUNCTION_MASK) >>
253 SWSCI_SCIC_SUB_FUNCTION_SHIFT;
254
255 /* Check if we can call the function. See swsci_setup for details. */
256 if (main_function == SWSCI_SBCB) {
257 if ((dev_priv->opregion.swsci_sbcb_sub_functions &
258 (1 << sub_function)) == 0)
259 return -EINVAL;
260 } else if (main_function == SWSCI_GBDA) {
261 if ((dev_priv->opregion.swsci_gbda_sub_functions &
262 (1 << sub_function)) == 0)
263 return -EINVAL;
264 }
265
266 /* Driver sleep timeout in ms. */
267 dslp = ioread32(&swsci->dslp);
268 if (!dslp) {
4994aa8c
PZ		 269 /* The spec says 2ms should be the default, but it's too small
270 * for some machines. */
271 dslp = 50;
bdde5c6a 272 } else if (dslp > MAX_DSLP) {
ebde53c7 273 /* Hey bios, trust must be earned. */
bdde5c6a
JN		 274 DRM_INFO_ONCE("ACPI BIOS requests an excessive sleep of %u ms, "
275 "using %u ms instead\n", dslp, MAX_DSLP);
276 dslp = MAX_DSLP;
ebde53c7
JN		 277 }
278
279 /* The spec tells us to do this, but we are the only user... */
280 scic = ioread32(&swsci->scic);
281 if (scic & SWSCI_SCIC_INDICATOR) {
282 DRM_DEBUG_DRIVER("SWSCI request already in progress\n");
283 return -EBUSY;
284 }
285
286 scic = function | SWSCI_SCIC_INDICATOR;
287
288 iowrite32(parm, &swsci->parm);
289 iowrite32(scic, &swsci->scic);
290
291 /* Ensure SCI event is selected and event trigger is cleared. */
292 pci_read_config_word(dev->pdev, PCI_SWSCI, &pci_swsci);
293 if (!(pci_swsci & PCI_SWSCI_SCISEL) || (pci_swsci & PCI_SWSCI_GSSCIE)) {
294 pci_swsci |= PCI_SWSCI_SCISEL;
295 pci_swsci &= ~PCI_SWSCI_GSSCIE;
296 pci_write_config_word(dev->pdev, PCI_SWSCI, pci_swsci);
297 }
298
299 /* Use event trigger to tell bios to check the mail. */
300 pci_swsci |= PCI_SWSCI_GSSCIE;
301 pci_write_config_word(dev->pdev, PCI_SWSCI, pci_swsci);
302
303 /* Poll for the result. */
304#define C (((scic = ioread32(&swsci->scic)) & SWSCI_SCIC_INDICATOR) == 0)
305 if (wait_for(C, dslp)) {
306 DRM_DEBUG_DRIVER("SWSCI request timed out\n");
307 return -ETIMEDOUT;
308 }
309
310 scic = (scic & SWSCI_SCIC_EXIT_STATUS_MASK) >>
311 SWSCI_SCIC_EXIT_STATUS_SHIFT;
312
313 /* Note: scic == 0 is an error! */
314 if (scic != SWSCI_SCIC_EXIT_STATUS_SUCCESS) {
315 DRM_DEBUG_DRIVER("SWSCI request error %u\n", scic);
316 return -EIO;
317 }
318
319 if (parm_out)
320 *parm_out = ioread32(&swsci->parm);
321
322 return 0;
323
324#undef C
325}
326
9c4b0a68
JN		 327#define DISPLAY_TYPE_CRT 0
328#define DISPLAY_TYPE_TV 1
329#define DISPLAY_TYPE_EXTERNAL_FLAT_PANEL 2
330#define DISPLAY_TYPE_INTERNAL_FLAT_PANEL 3
331
332int intel_opregion_notify_encoder(struct intel_encoder *intel_encoder,
333 bool enable)
334{
335 struct drm_device *dev = intel_encoder->base.dev;
336 u32 parm = 0;
337 u32 type = 0;
338 u32 port;
339
340 /* don't care about old stuff for now */
341 if (!HAS_DDI(dev))
342 return 0;
343
344 port = intel_ddi_get_encoder_port(intel_encoder);
345 if (port == PORT_E) {
346 port = 0;
347 } else {
348 parm |= 1 << port;
349 port++;
350 }
351
352 if (!enable)
353 parm |= 4 << 8;
354
355 switch (intel_encoder->type) {
356 case INTEL_OUTPUT_ANALOG:
357 type = DISPLAY_TYPE_CRT;
358 break;
359 case INTEL_OUTPUT_UNKNOWN:
360 case INTEL_OUTPUT_DISPLAYPORT:
361 case INTEL_OUTPUT_HDMI:
0e32b39c 362 case INTEL_OUTPUT_DP_MST:
9c4b0a68
JN		 363 type = DISPLAY_TYPE_EXTERNAL_FLAT_PANEL;
364 break;
365 case INTEL_OUTPUT_EDP:
366 type = DISPLAY_TYPE_INTERNAL_FLAT_PANEL;
367 break;
368 default:
369 WARN_ONCE(1, "unsupported intel_encoder type %d\n",
370 intel_encoder->type);
371 return -EINVAL;
372 }
373
374 parm |= type << (16 + port * 3);
375
376 return swsci(dev, SWSCI_SBCB_DISPLAY_POWER_STATE, parm, NULL);
377}
378
ecbc5cf3
JN		 379static const struct {
380 pci_power_t pci_power_state;
381 u32 parm;
382} power_state_map[] = {
383 { PCI_D0, 0x00 },
384 { PCI_D1, 0x01 },
385 { PCI_D2, 0x02 },
386 { PCI_D3hot, 0x04 },
387 { PCI_D3cold, 0x04 },
388};
389
390int intel_opregion_notify_adapter(struct drm_device *dev, pci_power_t state)
391{
392 int i;
393
394 if (!HAS_DDI(dev))
395 return 0;
396
397 for (i = 0; i < ARRAY_SIZE(power_state_map); i++) {
398 if (state == power_state_map[i].pci_power_state)
399 return swsci(dev, SWSCI_SBCB_ADAPTER_POWER_STATE,
400 power_state_map[i].parm, NULL);
401 }
402
403 return -EINVAL;
404}
405
8ee1c3db
MG		 406static u32 asle_set_backlight(struct drm_device *dev, u32 bclp)
407{
408 struct drm_i915_private *dev_priv = dev->dev_private;
c91c9f32 409 struct intel_connector *intel_connector;
5bc4418b 410 struct opregion_asle __iomem *asle = dev_priv->opregion.asle;
8ee1c3db 411
749052fb
JN		 412 DRM_DEBUG_DRIVER("bclp = 0x%08x\n", bclp);
413
da882e5a 414 if (acpi_video_get_backlight_type() == acpi_backlight_native) {
0b9f7d93
AL		 415 DRM_DEBUG_KMS("opregion backlight request ignored\n");
416 return 0;
417 }
418
8ee1c3db 419 if (!(bclp & ASLE_BCLP_VALID))
507c1a45 420 return ASLC_BACKLIGHT_FAILED;
8ee1c3db
MG		 421
422 bclp &= ASLE_BCLP_MSK;
a9573556 423 if (bclp > 255)
507c1a45 424 return ASLC_BACKLIGHT_FAILED;
8ee1c3db 425
51fd371b 426 drm_modeset_lock(&dev->mode_config.connection_mutex, NULL);
c91c9f32 427
752aa88a 428 /*
c91c9f32
JN		 429 * Update backlight on all connectors that support backlight (usually
430 * only one).
752aa88a 431 */
540b5d02 432 DRM_DEBUG_KMS("updating opregion backlight %d/255\n", bclp);
dc5a4363 433 list_for_each_entry(intel_connector, &dev->mode_config.connector_list, base.head)
6dda730e 434 intel_panel_set_backlight_acpi(intel_connector, bclp, 255);
cac6a5ae 435 iowrite32(DIV_ROUND_UP(bclp * 100, 255) | ASLE_CBLV_VALID, &asle->cblv);
8ee1c3db 436
51fd371b 437 drm_modeset_unlock(&dev->mode_config.connection_mutex);
752aa88a 438
c91c9f32
JN		 439
440 return 0;
8ee1c3db
MG		 441}
442
443static u32 asle_set_als_illum(struct drm_device *dev, u32 alsi)
444{
445 /* alsi is the current ALS reading in lux. 0 indicates below sensor
446 range, 0xffff indicates above sensor range. 1-0xfffe are valid */
e93d440b 447 DRM_DEBUG_DRIVER("Illum is not supported\n");
507c1a45 448 return ASLC_ALS_ILLUM_FAILED;
8ee1c3db
MG		 449}
450
451static u32 asle_set_pwm_freq(struct drm_device *dev, u32 pfmb)
452{
e93d440b 453 DRM_DEBUG_DRIVER("PWM freq is not supported\n");
507c1a45 454 return ASLC_PWM_FREQ_FAILED;
8ee1c3db
MG		 455}
456
457static u32 asle_set_pfit(struct drm_device *dev, u32 pfit)
458{
459 /* Panel fitting is currently controlled by the X code, so this is a
460 noop until modesetting support works fully */
e93d440b 461 DRM_DEBUG_DRIVER("Pfit is not supported\n");
507c1a45
PZ		 462 return ASLC_PFIT_FAILED;
463}
464
465static u32 asle_set_supported_rotation_angles(struct drm_device *dev, u32 srot)
466{
467 DRM_DEBUG_DRIVER("SROT is not supported\n");
468 return ASLC_ROTATION_ANGLES_FAILED;
469}
470
471static u32 asle_set_button_array(struct drm_device *dev, u32 iuer)
472{
473 if (!iuer)
474 DRM_DEBUG_DRIVER("Button array event is not supported (nothing)\n");
475 if (iuer & ASLE_IUER_ROTATION_LOCK_BTN)
476 DRM_DEBUG_DRIVER("Button array event is not supported (rotation lock)\n");
477 if (iuer & ASLE_IUER_VOLUME_DOWN_BTN)
478 DRM_DEBUG_DRIVER("Button array event is not supported (volume down)\n");
479 if (iuer & ASLE_IUER_VOLUME_UP_BTN)
480 DRM_DEBUG_DRIVER("Button array event is not supported (volume up)\n");
481 if (iuer & ASLE_IUER_WINDOWS_BTN)
482 DRM_DEBUG_DRIVER("Button array event is not supported (windows)\n");
483 if (iuer & ASLE_IUER_POWER_BTN)
484 DRM_DEBUG_DRIVER("Button array event is not supported (power)\n");
485
486 return ASLC_BUTTON_ARRAY_FAILED;
487}
488
489static u32 asle_set_convertible(struct drm_device *dev, u32 iuer)
490{
491 if (iuer & ASLE_IUER_CONVERTIBLE)
492 DRM_DEBUG_DRIVER("Convertible is not supported (clamshell)\n");
493 else
494 DRM_DEBUG_DRIVER("Convertible is not supported (slate)\n");
495
496 return ASLC_CONVERTIBLE_FAILED;
497}
498
499static u32 asle_set_docking(struct drm_device *dev, u32 iuer)
500{
501 if (iuer & ASLE_IUER_DOCKING)
502 DRM_DEBUG_DRIVER("Docking is not supported (docked)\n");
503 else
504 DRM_DEBUG_DRIVER("Docking is not supported (undocked)\n");
505
506 return ASLC_DOCKING_FAILED;
507}
508
509static u32 asle_isct_state(struct drm_device *dev)
510{
511 DRM_DEBUG_DRIVER("ISCT is not supported\n");
512 return ASLC_ISCT_STATE_FAILED;
8ee1c3db
MG		 513}
514
91a60f20 515static void asle_work(struct work_struct *work)
8ee1c3db 516{
91a60f20
JN		 517 struct intel_opregion *opregion =
518 container_of(work, struct intel_opregion, asle_work);
519 struct drm_i915_private *dev_priv =
520 container_of(opregion, struct drm_i915_private, opregion);
521 struct drm_device *dev = dev_priv->dev;
5bc4418b 522 struct opregion_asle __iomem *asle = dev_priv->opregion.asle;
507c1a45
PZ		 523 u32 aslc_stat = 0;
524 u32 aslc_req;
8ee1c3db
MG		 525
526 if (!asle)
527 return;
528
507c1a45 529 aslc_req = ioread32(&asle->aslc);
8ee1c3db 530
507c1a45
PZ		 531 if (!(aslc_req & ASLC_REQ_MSK)) {
532 DRM_DEBUG_DRIVER("No request on ASLC interrupt 0x%08x\n",
533 aslc_req);
8ee1c3db
MG		 534 return;
535 }
536
507c1a45
PZ		 537 if (aslc_req & ASLC_SET_ALS_ILLUM)
538 aslc_stat |= asle_set_als_illum(dev, ioread32(&asle->alsi));
539
540 if (aslc_req & ASLC_SET_BACKLIGHT)
541 aslc_stat |= asle_set_backlight(dev, ioread32(&asle->bclp));
542
543 if (aslc_req & ASLC_SET_PFIT)
544 aslc_stat |= asle_set_pfit(dev, ioread32(&asle->pfit));
545
546 if (aslc_req & ASLC_SET_PWM_FREQ)
547 aslc_stat |= asle_set_pwm_freq(dev, ioread32(&asle->pfmb));
548
549 if (aslc_req & ASLC_SUPPORTED_ROTATION_ANGLES)
550 aslc_stat |= asle_set_supported_rotation_angles(dev,
551 ioread32(&asle->srot));
552
553 if (aslc_req & ASLC_BUTTON_ARRAY)
554 aslc_stat |= asle_set_button_array(dev, ioread32(&asle->iuer));
8ee1c3db 555
507c1a45
PZ		 556 if (aslc_req & ASLC_CONVERTIBLE_INDICATOR)
557 aslc_stat |= asle_set_convertible(dev, ioread32(&asle->iuer));
8ee1c3db 558
507c1a45
PZ		 559 if (aslc_req & ASLC_DOCKING_INDICATOR)
560 aslc_stat |= asle_set_docking(dev, ioread32(&asle->iuer));
8ee1c3db 561
507c1a45
PZ		 562 if (aslc_req & ASLC_ISCT_STATE_CHANGE)
563 aslc_stat |= asle_isct_state(dev);
8ee1c3db 564
507c1a45 565 iowrite32(aslc_stat, &asle->aslc);
8ee1c3db
MG		 566}
567
91a60f20
JN		 568void intel_opregion_asle_intr(struct drm_device *dev)
569{
570 struct drm_i915_private *dev_priv = dev->dev_private;
571
572 if (dev_priv->opregion.asle)
573 schedule_work(&dev_priv->opregion.asle_work);
574}
575
8ee1c3db
MG		 576#define ACPI_EV_DISPLAY_SWITCH (1<<0)
577#define ACPI_EV_LID (1<<1)
578#define ACPI_EV_DOCK (1<<2)
579
580static struct intel_opregion *system_opregion;
581
b358d0a6
HE		 582static int intel_opregion_video_event(struct notifier_block *nb,
583 unsigned long val, void *data)
8ee1c3db
MG		 584{
585 /* The only video events relevant to opregion are 0x80. These indicate
586 either a docking event, lid switch or display switch request. In
587 Linux, these are handled by the dock, button and video drivers.
f5a3d0c4 588 */
8ee1c3db 589
5bc4418b 590 struct opregion_acpi __iomem *acpi;
f5a3d0c4
MG		 591 struct acpi_bus_event *event = data;
592 int ret = NOTIFY_OK;
593
594 if (strcmp(event->device_class, ACPI_VIDEO_CLASS) != 0)
595 return NOTIFY_DONE;
8ee1c3db
MG		 596
597 if (!system_opregion)
598 return NOTIFY_DONE;
599
600 acpi = system_opregion->acpi;
f5a3d0c4 601
5bc4418b
BW		 602 if (event->type == 0x80 &&
603 (ioread32(&acpi->cevt) & 1) == 0)
f5a3d0c4
MG		 604 ret = NOTIFY_BAD;
605
5bc4418b 606 iowrite32(0, &acpi->csts);
8ee1c3db 607
f5a3d0c4 608 return ret;
8ee1c3db
MG		 609}
610
611static struct notifier_block intel_opregion_notifier = {
612 .notifier_call = intel_opregion_video_event,
613};
614
74a365b3
MG		 615/*
616 * Initialise the DIDL field in opregion. This passes a list of devices to
617 * the firmware. Values are defined by section B.4.2 of the ACPI specification
618 * (version 3)
619 */
620
d5cbb22f
JN		 621static u32 get_did(struct intel_opregion *opregion, int i)
622{
623 u32 did;
624
625 if (i < ARRAY_SIZE(opregion->acpi->didl)) {
626 did = ioread32(&opregion->acpi->didl[i]);
627 } else {
628 i -= ARRAY_SIZE(opregion->acpi->didl);
629
630 if (WARN_ON(i >= ARRAY_SIZE(opregion->acpi->did2)))
631 return 0;
632
633 did = ioread32(&opregion->acpi->did2[i]);
634 }
635
636 return did;
637}
638
639static void set_did(struct intel_opregion *opregion, int i, u32 val)
640{
641 if (i < ARRAY_SIZE(opregion->acpi->didl)) {
642 iowrite32(val, &opregion->acpi->didl[i]);
643 } else {
644 i -= ARRAY_SIZE(opregion->acpi->didl);
645
646 if (WARN_ON(i >= ARRAY_SIZE(opregion->acpi->did2)))
647 return;
648
649 iowrite32(val, &opregion->acpi->did2[i]);
650 }
651}
652
74a365b3
MG		 653static void intel_didl_outputs(struct drm_device *dev)
654{
655 struct drm_i915_private *dev_priv = dev->dev_private;
656 struct intel_opregion *opregion = &dev_priv->opregion;
657 struct drm_connector *connector;
3143751f
ZR		 658 acpi_handle handle;
659 struct acpi_device *acpi_dev, *acpi_cdev, *acpi_video_bus = NULL;
660 unsigned long long device_id;
661 acpi_status status;
dfc2066d 662 u32 temp, max_outputs;
74a365b3
MG		 663 int i = 0;
664
3a83f992 665 handle = ACPI_HANDLE(&dev->pdev->dev);
7d37beaa 666 if (!handle || acpi_bus_get_device(handle, &acpi_dev))
3143751f
ZR		 667 return;
668
d4e1a692 669 if (acpi_is_video_device(handle))
3143751f
ZR		 670 acpi_video_bus = acpi_dev;
671 else {
672 list_for_each_entry(acpi_cdev, &acpi_dev->children, node) {
d4e1a692 673 if (acpi_is_video_device(acpi_cdev->handle)) {
3143751f
ZR		 674 acpi_video_bus = acpi_cdev;
675 break;
676 }
677 }
678 }
679
680 if (!acpi_video_bus) {
b4fe8156 681 DRM_ERROR("No ACPI video bus found\n");
3143751f
ZR		 682 return;
683 }
684
dfc2066d
JN		 685 /*
686 * In theory, did2, the extended didl, gets added at opregion version
687 * 3.0. In practice, however, we're supposed to set it for earlier
688 * versions as well, since a BIOS that doesn't understand did2 should
689 * not look at it anyway. Use a variable so we can tweak this if a need
690 * arises later.
691 */
692 max_outputs = ARRAY_SIZE(opregion->acpi->didl) +
693 ARRAY_SIZE(opregion->acpi->did2);
694
3143751f 695 list_for_each_entry(acpi_cdev, &acpi_video_bus->children, node) {
dfc2066d
JN		 696 if (i >= max_outputs) {
697 DRM_DEBUG_KMS("More than %u outputs detected via ACPI\n",
698 max_outputs);
3143751f
ZR		 699 return;
700 }
d5cbb22f
JN		 701 status = acpi_evaluate_integer(acpi_cdev->handle, "_ADR",
702 NULL, &device_id);
3143751f
ZR		 703 if (ACPI_SUCCESS(status)) {
704 if (!device_id)
705 goto blind_set;
d5cbb22f 706 set_did(opregion, i++, (u32)(device_id & 0x0f0f));
3143751f
ZR		 707 }
708 }
709
710end:
dfc2066d
JN		 711 DRM_DEBUG_KMS("%d outputs detected\n", i);
712
713 /* If fewer than max outputs, the list must be null terminated */
714 if (i < max_outputs)
d5cbb22f 715 set_did(opregion, i, 0);
3143751f
ZR		 716 return;
717
718blind_set:
719 i = 0;
74a365b3
MG		 720 list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
721 int output_type = ACPI_OTHER_OUTPUT;
dfc2066d
JN		 722 if (i >= max_outputs) {
723 DRM_DEBUG_KMS("More than %u outputs in connector list\n",
724 max_outputs);
74a365b3
MG		 725 return;
726 }
727 switch (connector->connector_type) {
728 case DRM_MODE_CONNECTOR_VGA:
729 case DRM_MODE_CONNECTOR_DVIA:
730 output_type = ACPI_VGA_OUTPUT;
731 break;
732 case DRM_MODE_CONNECTOR_Composite:
733 case DRM_MODE_CONNECTOR_SVIDEO:
734 case DRM_MODE_CONNECTOR_Component:
735 case DRM_MODE_CONNECTOR_9PinDIN:
736 output_type = ACPI_TV_OUTPUT;
737 break;
738 case DRM_MODE_CONNECTOR_DVII:
739 case DRM_MODE_CONNECTOR_DVID:
740 case DRM_MODE_CONNECTOR_DisplayPort:
741 case DRM_MODE_CONNECTOR_HDMIA:
742 case DRM_MODE_CONNECTOR_HDMIB:
743 output_type = ACPI_DIGITAL_OUTPUT;
744 break;
745 case DRM_MODE_CONNECTOR_LVDS:
746 output_type = ACPI_LVDS_OUTPUT;
747 break;
748 }
d5cbb22f
JN		 749 temp = get_did(opregion, i);
750 set_did(opregion, i, temp | (1 << 31) | output_type | i);
74a365b3
MG		 751 i++;
752 }
3143751f 753 goto end;
74a365b3
MG		 754}
755
d627b62f
L		 756static void intel_setup_cadls(struct drm_device *dev)
757{
758 struct drm_i915_private *dev_priv = dev->dev_private;
759 struct intel_opregion *opregion = &dev_priv->opregion;
760 int i = 0;
761 u32 disp_id;
762
763 /* Initialize the CADL field by duplicating the DIDL values.
764 * Technically, this is not always correct as display outputs may exist,
765 * but not active. This initialization is necessary for some Clevo
766 * laptops that check this field before processing the brightness and
767 * display switching hotkeys. Just like DIDL, CADL is NULL-terminated if
768 * there are less than eight devices. */
769 do {
d5cbb22f 770 disp_id = get_did(opregion, i);
d627b62f
L		 771 iowrite32(disp_id, &opregion->acpi->cadl[i]);
772 } while (++i < 8 && disp_id != 0);
773}
774
44834a67
CW		 775void intel_opregion_init(struct drm_device *dev)
776{
777 struct drm_i915_private *dev_priv = dev->dev_private;
778 struct intel_opregion *opregion = &dev_priv->opregion;
779
780 if (!opregion->header)
781 return;
782
783 if (opregion->acpi) {
3f52c6ed
DV		 784 intel_didl_outputs(dev);
785 intel_setup_cadls(dev);
44834a67
CW		 786
787 /* Notify BIOS we are ready to handle ACPI video ext notifs.
788 * Right now, all the events are handled by the ACPI video module.
789 * We don't actually need to do anything with them. */
5bc4418b
BW		 790 iowrite32(0, &opregion->acpi->csts);
791 iowrite32(1, &opregion->acpi->drdy);
44834a67
CW		 792
793 system_opregion = opregion;
794 register_acpi_notifier(&intel_opregion_notifier);
795 }
796
68bca4b0 797 if (opregion->asle) {
68bca4b0
JN		 798 iowrite32(ASLE_TCHE_BLC_EN, &opregion->asle->tche);
799 iowrite32(ASLE_ARDY_READY, &opregion->asle->ardy);
800 }
44834a67
CW		 801}
802
803void intel_opregion_fini(struct drm_device *dev)
804{
805 struct drm_i915_private *dev_priv = dev->dev_private;
806 struct intel_opregion *opregion = &dev_priv->opregion;
807
808 if (!opregion->header)
809 return;
810
68bca4b0
JN		 811 if (opregion->asle)
812 iowrite32(ASLE_ARDY_NOT_READY, &opregion->asle->ardy);
813
91a60f20
JN		 814 cancel_work_sync(&dev_priv->opregion.asle_work);
815
44834a67 816 if (opregion->acpi) {
5bc4418b 817 iowrite32(0, &opregion->acpi->drdy);
44834a67
CW		 818
819 system_opregion = NULL;
820 unregister_acpi_notifier(&intel_opregion_notifier);
821 }
822
823 /* just clear all opregion memory pointers now */
824 iounmap(opregion->header);
825 opregion->header = NULL;
826 opregion->acpi = NULL;
827 opregion->swsci = NULL;
828 opregion->asle = NULL;
829 opregion->vbt = NULL;
794a79a6 830 opregion->lid_state = NULL;
44834a67 831}
ebde53c7
JN		 832
833static void swsci_setup(struct drm_device *dev)
834{
835 struct drm_i915_private *dev_priv = dev->dev_private;
836 struct intel_opregion *opregion = &dev_priv->opregion;
837 bool requested_callbacks = false;
838 u32 tmp;
839
840 /* Sub-function code 0 is okay, let's allow them. */
841 opregion->swsci_gbda_sub_functions = 1;
842 opregion->swsci_sbcb_sub_functions = 1;
843
844 /* We use GBDA to ask for supported GBDA calls. */
845 if (swsci(dev, SWSCI_GBDA_SUPPORTED_CALLS, 0, &tmp) == 0) {
846 /* make the bits match the sub-function codes */
847 tmp <<= 1;
848 opregion->swsci_gbda_sub_functions |= tmp;
849 }
850
851 /*
852 * We also use GBDA to ask for _requested_ SBCB callbacks. The driver
853 * must not call interfaces that are not specifically requested by the
854 * bios.
855 */
856 if (swsci(dev, SWSCI_GBDA_REQUESTED_CALLBACKS, 0, &tmp) == 0) {
857 /* here, the bits already match sub-function codes */
858 opregion->swsci_sbcb_sub_functions |= tmp;
859 requested_callbacks = true;
860 }
861
862 /*
863 * But we use SBCB to ask for _supported_ SBCB calls. This does not mean
864 * the callback is _requested_. But we still can't call interfaces that
865 * are not requested.
866 */
867 if (swsci(dev, SWSCI_SBCB_SUPPORTED_CALLBACKS, 0, &tmp) == 0) {
868 /* make the bits match the sub-function codes */
869 u32 low = tmp & 0x7ff;
870 u32 high = tmp & ~0xfff; /* bit 11 is reserved */
871 tmp = (high << 4) | (low << 1) | 1;
872
873 /* best guess what to do with supported wrt requested */
874 if (requested_callbacks) {
875 u32 req = opregion->swsci_sbcb_sub_functions;
876 if ((req & tmp) != req)
877 DRM_DEBUG_DRIVER("SWSCI BIOS requested (%08x) SBCB callbacks that are not supported (%08x)\n", req, tmp);
878 /* XXX: for now, trust the requested callbacks */
879 /* opregion->swsci_sbcb_sub_functions &= tmp; */
880 } else {
881 opregion->swsci_sbcb_sub_functions |= tmp;
882 }
883 }
884
885 DRM_DEBUG_DRIVER("SWSCI GBDA callbacks %08x, SBCB callbacks %08x\n",
886 opregion->swsci_gbda_sub_functions,
887 opregion->swsci_sbcb_sub_functions);
888}
889#else /* CONFIG_ACPI */
890static inline void swsci_setup(struct drm_device *dev) {}
891#endif /* CONFIG_ACPI */
44834a67
CW		 892
893int intel_opregion_setup(struct drm_device *dev)
8ee1c3db
MG		 894{
895 struct drm_i915_private *dev_priv = dev->dev_private;
896 struct intel_opregion *opregion = &dev_priv->opregion;
5bc4418b 897 void __iomem *base;
8ee1c3db 898 u32 asls, mboxes;
5bc4418b 899 char buf[sizeof(OPREGION_SIGNATURE)];
8ee1c3db
MG		 900 int err = 0;
901
2d80391d
JN		 902 BUILD_BUG_ON(sizeof(struct opregion_header) != 0x100);
903 BUILD_BUG_ON(sizeof(struct opregion_acpi) != 0x100);
904 BUILD_BUG_ON(sizeof(struct opregion_swsci) != 0x100);
905 BUILD_BUG_ON(sizeof(struct opregion_asle) != 0x100);
906
8ee1c3db 907 pci_read_config_dword(dev->pdev, PCI_ASLS, &asls);
44d98a61 908 DRM_DEBUG_DRIVER("graphic opregion physical addr: 0x%x\n", asls);
8ee1c3db 909 if (asls == 0) {
44d98a61 910 DRM_DEBUG_DRIVER("ACPI OpRegion not supported!\n");
8ee1c3db
MG		 911 return -ENOTSUPP;
912 }
913
1dca220b 914#ifdef CONFIG_ACPI
91a60f20 915 INIT_WORK(&opregion->asle_work, asle_work);
1dca220b 916#endif
91a60f20 917
b705120e 918 base = acpi_os_ioremap(asls, OPREGION_SIZE);
8ee1c3db
MG		 919 if (!base)
920 return -ENOMEM;
921
5bc4418b
BW		 922 memcpy_fromio(buf, base, sizeof(buf));
923
924 if (memcmp(buf, OPREGION_SIGNATURE, 16)) {
44d98a61 925 DRM_DEBUG_DRIVER("opregion signature mismatch\n");
8ee1c3db
MG		 926 err = -EINVAL;
927 goto err_out;
928 }
44834a67
CW		 929 opregion->header = base;
930 opregion->vbt = base + OPREGION_VBT_OFFSET;
8ee1c3db 931
82d3c90c 932 opregion->lid_state = base + ACPI_CLID;
01fe9dbd 933
5bc4418b 934 mboxes = ioread32(&opregion->header->mboxes);
8ee1c3db 935 if (mboxes & MBOX_ACPI) {
44d98a61 936 DRM_DEBUG_DRIVER("Public ACPI methods supported\n");
8ee1c3db 937 opregion->acpi = base + OPREGION_ACPI_OFFSET;
8ee1c3db 938 }
8ee1c3db
MG		 939
940 if (mboxes & MBOX_SWSCI) {
44d98a61 941 DRM_DEBUG_DRIVER("SWSCI supported\n");
8ee1c3db 942 opregion->swsci = base + OPREGION_SWSCI_OFFSET;
ebde53c7 943 swsci_setup(dev);
8ee1c3db
MG		 944 }
945 if (mboxes & MBOX_ASLE) {
44d98a61 946 DRM_DEBUG_DRIVER("ASLE supported\n");
8ee1c3db 947 opregion->asle = base + OPREGION_ASLE_OFFSET;
68bca4b0
JN		 948
949 iowrite32(ASLE_ARDY_NOT_READY, &opregion->asle->ardy);
8ee1c3db
MG		 950 }
951
8ee1c3db
MG		 952 return 0;
953
954err_out:
30c56660 955 iounmap(base);
8ee1c3db
MG		 956 return err;
957}
Linux 6.x block layer and io_uring tree(s)