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drm/dp: add a hw mutex around the transfer functions. (v2)
[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
a70491cc
JP		 28#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
29
8ee1c3db 30#include <linux/acpi.h>
74a365b3 31#include <acpi/video.h>
8ee1c3db 32
760285e7
DH		 33#include <drm/drmP.h>
34#include <drm/i915_drm.h>
8ee1c3db 35#include "i915_drv.h"
a9573556 36#include "intel_drv.h"
8ee1c3db 37
ebde53c7
JN		 38#define PCI_ASLE 0xe4
39#define PCI_ASLS 0xfc
40#define PCI_SWSCI 0xe8
41#define PCI_SWSCI_SCISEL (1 << 15)
42#define PCI_SWSCI_GSSCIE (1 << 0)
8ee1c3db 43
8ee1c3db
MG		 44#define OPREGION_HEADER_OFFSET 0
45#define OPREGION_ACPI_OFFSET 0x100
82d3c90c
CW		 46#define ACPI_CLID 0x01ac /* current lid state indicator */
47#define ACPI_CDCK 0x01b0 /* current docking state indicator */
8ee1c3db
MG		 48#define OPREGION_SWSCI_OFFSET 0x200
49#define OPREGION_ASLE_OFFSET 0x300
44834a67 50#define OPREGION_VBT_OFFSET 0x400
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)
56
57struct opregion_header {
0206e353
AJ		 58 u8 signature[16];
59 u32 size;
60 u32 opregion_ver;
61 u8 bios_ver[32];
62 u8 vbios_ver[16];
63 u8 driver_ver[16];
64 u32 mboxes;
65 u8 reserved[164];
e4451239 66} __packed;
8ee1c3db
MG		 67
68/* OpRegion mailbox #1: public ACPI methods */
69struct opregion_acpi {
0206e353
AJ		 70 u32 drdy; /* driver readiness */
71 u32 csts; /* notification status */
72 u32 cevt; /* current event */
73 u8 rsvd1[20];
74 u32 didl[8]; /* supported display devices ID list */
75 u32 cpdl[8]; /* currently presented display list */
76 u32 cadl[8]; /* currently active display list */
77 u32 nadl[8]; /* next active devices list */
78 u32 aslp; /* ASL sleep time-out */
79 u32 tidx; /* toggle table index */
80 u32 chpd; /* current hotplug enable indicator */
81 u32 clid; /* current lid state*/
82 u32 cdck; /* current docking state */
83 u32 sxsw; /* Sx state resume */
84 u32 evts; /* ASL supported events */
85 u32 cnot; /* current OS notification */
86 u32 nrdy; /* driver status */
87 u8 rsvd2[60];
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 */
116 u8 rsvd[86];
e4451239 117} __packed;
8ee1c3db 118
68bca4b0
JN		 119/* Driver readiness indicator */
120#define ASLE_ARDY_READY (1 << 0)
121#define ASLE_ARDY_NOT_READY (0 << 0)
122
507c1a45
PZ		 123/* ASLE Interrupt Command (ASLC) bits */
124#define ASLC_SET_ALS_ILLUM (1 << 0)
125#define ASLC_SET_BACKLIGHT (1 << 1)
126#define ASLC_SET_PFIT (1 << 2)
127#define ASLC_SET_PWM_FREQ (1 << 3)
128#define ASLC_SUPPORTED_ROTATION_ANGLES (1 << 4)
129#define ASLC_BUTTON_ARRAY (1 << 5)
130#define ASLC_CONVERTIBLE_INDICATOR (1 << 6)
131#define ASLC_DOCKING_INDICATOR (1 << 7)
132#define ASLC_ISCT_STATE_CHANGE (1 << 8)
133#define ASLC_REQ_MSK 0x1ff
134/* response bits */
135#define ASLC_ALS_ILLUM_FAILED (1 << 10)
136#define ASLC_BACKLIGHT_FAILED (1 << 12)
137#define ASLC_PFIT_FAILED (1 << 14)
138#define ASLC_PWM_FREQ_FAILED (1 << 16)
139#define ASLC_ROTATION_ANGLES_FAILED (1 << 18)
140#define ASLC_BUTTON_ARRAY_FAILED (1 << 20)
141#define ASLC_CONVERTIBLE_FAILED (1 << 22)
142#define ASLC_DOCKING_FAILED (1 << 24)
143#define ASLC_ISCT_STATE_FAILED (1 << 26)
8ee1c3db 144
f599cc29
JN		 145/* Technology enabled indicator */
146#define ASLE_TCHE_ALS_EN (1 << 0)
147#define ASLE_TCHE_BLC_EN (1 << 1)
148#define ASLE_TCHE_PFIT_EN (1 << 2)
149#define ASLE_TCHE_PFMB_EN (1 << 3)
150
8ee1c3db
MG		 151/* ASLE backlight brightness to set */
152#define ASLE_BCLP_VALID (1<<31)
153#define ASLE_BCLP_MSK (~(1<<31))
154
155/* ASLE panel fitting request */
156#define ASLE_PFIT_VALID (1<<31)
157#define ASLE_PFIT_CENTER (1<<0)
158#define ASLE_PFIT_STRETCH_TEXT (1<<1)
159#define ASLE_PFIT_STRETCH_GFX (1<<2)
160
161/* PWM frequency and minimum brightness */
162#define ASLE_PFMB_BRIGHTNESS_MASK (0xff)
163#define ASLE_PFMB_BRIGHTNESS_VALID (1<<8)
164#define ASLE_PFMB_PWM_MASK (0x7ffffe00)
165#define ASLE_PFMB_PWM_VALID (1<<31)
166
167#define ASLE_CBLV_VALID (1<<31)
168
507c1a45
PZ		 169/* IUER */
170#define ASLE_IUER_DOCKING (1 << 7)
171#define ASLE_IUER_CONVERTIBLE (1 << 6)
172#define ASLE_IUER_ROTATION_LOCK_BTN (1 << 4)
173#define ASLE_IUER_VOLUME_DOWN_BTN (1 << 3)
174#define ASLE_IUER_VOLUME_UP_BTN (1 << 2)
175#define ASLE_IUER_WINDOWS_BTN (1 << 1)
176#define ASLE_IUER_POWER_BTN (1 << 0)
177
ebde53c7
JN		 178/* Software System Control Interrupt (SWSCI) */
179#define SWSCI_SCIC_INDICATOR (1 << 0)
180#define SWSCI_SCIC_MAIN_FUNCTION_SHIFT 1
181#define SWSCI_SCIC_MAIN_FUNCTION_MASK (0xf << 1)
182#define SWSCI_SCIC_SUB_FUNCTION_SHIFT 8
183#define SWSCI_SCIC_SUB_FUNCTION_MASK (0xff << 8)
184#define SWSCI_SCIC_EXIT_PARAMETER_SHIFT 8
185#define SWSCI_SCIC_EXIT_PARAMETER_MASK (0xff << 8)
186#define SWSCI_SCIC_EXIT_STATUS_SHIFT 5
187#define SWSCI_SCIC_EXIT_STATUS_MASK (7 << 5)
188#define SWSCI_SCIC_EXIT_STATUS_SUCCESS 1
189
190#define SWSCI_FUNCTION_CODE(main, sub) \
191 ((main) << SWSCI_SCIC_MAIN_FUNCTION_SHIFT | \
192 (sub) << SWSCI_SCIC_SUB_FUNCTION_SHIFT)
193
194/* SWSCI: Get BIOS Data (GBDA) */
195#define SWSCI_GBDA 4
196#define SWSCI_GBDA_SUPPORTED_CALLS SWSCI_FUNCTION_CODE(SWSCI_GBDA, 0)
197#define SWSCI_GBDA_REQUESTED_CALLBACKS SWSCI_FUNCTION_CODE(SWSCI_GBDA, 1)
198#define SWSCI_GBDA_BOOT_DISPLAY_PREF SWSCI_FUNCTION_CODE(SWSCI_GBDA, 4)
199#define SWSCI_GBDA_PANEL_DETAILS SWSCI_FUNCTION_CODE(SWSCI_GBDA, 5)
200#define SWSCI_GBDA_TV_STANDARD SWSCI_FUNCTION_CODE(SWSCI_GBDA, 6)
201#define SWSCI_GBDA_INTERNAL_GRAPHICS SWSCI_FUNCTION_CODE(SWSCI_GBDA, 7)
202#define SWSCI_GBDA_SPREAD_SPECTRUM SWSCI_FUNCTION_CODE(SWSCI_GBDA, 10)
203
204/* SWSCI: System BIOS Callbacks (SBCB) */
205#define SWSCI_SBCB 6
206#define SWSCI_SBCB_SUPPORTED_CALLBACKS SWSCI_FUNCTION_CODE(SWSCI_SBCB, 0)
207#define SWSCI_SBCB_INIT_COMPLETION SWSCI_FUNCTION_CODE(SWSCI_SBCB, 1)
208#define SWSCI_SBCB_PRE_HIRES_SET_MODE SWSCI_FUNCTION_CODE(SWSCI_SBCB, 3)
209#define SWSCI_SBCB_POST_HIRES_SET_MODE SWSCI_FUNCTION_CODE(SWSCI_SBCB, 4)
210#define SWSCI_SBCB_DISPLAY_SWITCH SWSCI_FUNCTION_CODE(SWSCI_SBCB, 5)
211#define SWSCI_SBCB_SET_TV_FORMAT SWSCI_FUNCTION_CODE(SWSCI_SBCB, 6)
212#define SWSCI_SBCB_ADAPTER_POWER_STATE SWSCI_FUNCTION_CODE(SWSCI_SBCB, 7)
213#define SWSCI_SBCB_DISPLAY_POWER_STATE SWSCI_FUNCTION_CODE(SWSCI_SBCB, 8)
214#define SWSCI_SBCB_SET_BOOT_DISPLAY SWSCI_FUNCTION_CODE(SWSCI_SBCB, 9)
215#define SWSCI_SBCB_SET_PANEL_DETAILS SWSCI_FUNCTION_CODE(SWSCI_SBCB, 10)
216#define SWSCI_SBCB_SET_INTERNAL_GFX SWSCI_FUNCTION_CODE(SWSCI_SBCB, 11)
217#define SWSCI_SBCB_POST_HIRES_TO_DOS_FS SWSCI_FUNCTION_CODE(SWSCI_SBCB, 16)
218#define SWSCI_SBCB_SUSPEND_RESUME SWSCI_FUNCTION_CODE(SWSCI_SBCB, 17)
219#define SWSCI_SBCB_SET_SPREAD_SPECTRUM SWSCI_FUNCTION_CODE(SWSCI_SBCB, 18)
220#define SWSCI_SBCB_POST_VBE_PM SWSCI_FUNCTION_CODE(SWSCI_SBCB, 19)
221#define SWSCI_SBCB_ENABLE_DISABLE_AUDIO SWSCI_FUNCTION_CODE(SWSCI_SBCB, 21)
222
74a365b3
MG		 223#define ACPI_OTHER_OUTPUT (0<<8)
224#define ACPI_VGA_OUTPUT (1<<8)
225#define ACPI_TV_OUTPUT (2<<8)
226#define ACPI_DIGITAL_OUTPUT (3<<8)
227#define ACPI_LVDS_OUTPUT (4<<8)
228
bdde5c6a
JN		 229#define MAX_DSLP 1500
230
44834a67 231#ifdef CONFIG_ACPI
ebde53c7
JN		 232static int swsci(struct drm_device *dev, u32 function, u32 parm, u32 *parm_out)
233{
234 struct drm_i915_private *dev_priv = dev->dev_private;
235 struct opregion_swsci __iomem *swsci = dev_priv->opregion.swsci;
236 u32 main_function, sub_function, scic;
237 u16 pci_swsci;
238 u32 dslp;
239
240 if (!swsci)
241 return -ENODEV;
242
243 main_function = (function & SWSCI_SCIC_MAIN_FUNCTION_MASK) >>
244 SWSCI_SCIC_MAIN_FUNCTION_SHIFT;
245 sub_function = (function & SWSCI_SCIC_SUB_FUNCTION_MASK) >>
246 SWSCI_SCIC_SUB_FUNCTION_SHIFT;
247
248 /* Check if we can call the function. See swsci_setup for details. */
249 if (main_function == SWSCI_SBCB) {
250 if ((dev_priv->opregion.swsci_sbcb_sub_functions &
251 (1 << sub_function)) == 0)
252 return -EINVAL;
253 } else if (main_function == SWSCI_GBDA) {
254 if ((dev_priv->opregion.swsci_gbda_sub_functions &
255 (1 << sub_function)) == 0)
256 return -EINVAL;
257 }
258
259 /* Driver sleep timeout in ms. */
260 dslp = ioread32(&swsci->dslp);
261 if (!dslp) {
4994aa8c
PZ		 262 /* The spec says 2ms should be the default, but it's too small
263 * for some machines. */
264 dslp = 50;
bdde5c6a 265 } else if (dslp > MAX_DSLP) {
ebde53c7 266 /* Hey bios, trust must be earned. */
bdde5c6a
JN		 267 DRM_INFO_ONCE("ACPI BIOS requests an excessive sleep of %u ms, "
268 "using %u ms instead\n", dslp, MAX_DSLP);
269 dslp = MAX_DSLP;
ebde53c7
JN		 270 }
271
272 /* The spec tells us to do this, but we are the only user... */
273 scic = ioread32(&swsci->scic);
274 if (scic & SWSCI_SCIC_INDICATOR) {
275 DRM_DEBUG_DRIVER("SWSCI request already in progress\n");
276 return -EBUSY;
277 }
278
279 scic = function | SWSCI_SCIC_INDICATOR;
280
281 iowrite32(parm, &swsci->parm);
282 iowrite32(scic, &swsci->scic);
283
284 /* Ensure SCI event is selected and event trigger is cleared. */
285 pci_read_config_word(dev->pdev, PCI_SWSCI, &pci_swsci);
286 if (!(pci_swsci & PCI_SWSCI_SCISEL) || (pci_swsci & PCI_SWSCI_GSSCIE)) {
287 pci_swsci |= PCI_SWSCI_SCISEL;
288 pci_swsci &= ~PCI_SWSCI_GSSCIE;
289 pci_write_config_word(dev->pdev, PCI_SWSCI, pci_swsci);
290 }
291
292 /* Use event trigger to tell bios to check the mail. */
293 pci_swsci |= PCI_SWSCI_GSSCIE;
294 pci_write_config_word(dev->pdev, PCI_SWSCI, pci_swsci);
295
296 /* Poll for the result. */
297#define C (((scic = ioread32(&swsci->scic)) & SWSCI_SCIC_INDICATOR) == 0)
298 if (wait_for(C, dslp)) {
299 DRM_DEBUG_DRIVER("SWSCI request timed out\n");
300 return -ETIMEDOUT;
301 }
302
303 scic = (scic & SWSCI_SCIC_EXIT_STATUS_MASK) >>
304 SWSCI_SCIC_EXIT_STATUS_SHIFT;
305
306 /* Note: scic == 0 is an error! */
307 if (scic != SWSCI_SCIC_EXIT_STATUS_SUCCESS) {
308 DRM_DEBUG_DRIVER("SWSCI request error %u\n", scic);
309 return -EIO;
310 }
311
312 if (parm_out)
313 *parm_out = ioread32(&swsci->parm);
314
315 return 0;
316
317#undef C
318}
319
9c4b0a68
JN		 320#define DISPLAY_TYPE_CRT 0
321#define DISPLAY_TYPE_TV 1
322#define DISPLAY_TYPE_EXTERNAL_FLAT_PANEL 2
323#define DISPLAY_TYPE_INTERNAL_FLAT_PANEL 3
324
325int intel_opregion_notify_encoder(struct intel_encoder *intel_encoder,
326 bool enable)
327{
328 struct drm_device *dev = intel_encoder->base.dev;
329 u32 parm = 0;
330 u32 type = 0;
331 u32 port;
332
333 /* don't care about old stuff for now */
334 if (!HAS_DDI(dev))
335 return 0;
336
337 port = intel_ddi_get_encoder_port(intel_encoder);
338 if (port == PORT_E) {
339 port = 0;
340 } else {
341 parm |= 1 << port;
342 port++;
343 }
344
345 if (!enable)
346 parm |= 4 << 8;
347
348 switch (intel_encoder->type) {
349 case INTEL_OUTPUT_ANALOG:
350 type = DISPLAY_TYPE_CRT;
351 break;
352 case INTEL_OUTPUT_UNKNOWN:
353 case INTEL_OUTPUT_DISPLAYPORT:
354 case INTEL_OUTPUT_HDMI:
355 type = DISPLAY_TYPE_EXTERNAL_FLAT_PANEL;
356 break;
357 case INTEL_OUTPUT_EDP:
358 type = DISPLAY_TYPE_INTERNAL_FLAT_PANEL;
359 break;
360 default:
361 WARN_ONCE(1, "unsupported intel_encoder type %d\n",
362 intel_encoder->type);
363 return -EINVAL;
364 }
365
366 parm |= type << (16 + port * 3);
367
368 return swsci(dev, SWSCI_SBCB_DISPLAY_POWER_STATE, parm, NULL);
369}
370
ecbc5cf3
JN		 371static const struct {
372 pci_power_t pci_power_state;
373 u32 parm;
374} power_state_map[] = {
375 { PCI_D0, 0x00 },
376 { PCI_D1, 0x01 },
377 { PCI_D2, 0x02 },
378 { PCI_D3hot, 0x04 },
379 { PCI_D3cold, 0x04 },
380};
381
382int intel_opregion_notify_adapter(struct drm_device *dev, pci_power_t state)
383{
384 int i;
385
386 if (!HAS_DDI(dev))
387 return 0;
388
389 for (i = 0; i < ARRAY_SIZE(power_state_map); i++) {
390 if (state == power_state_map[i].pci_power_state)
391 return swsci(dev, SWSCI_SBCB_ADAPTER_POWER_STATE,
392 power_state_map[i].parm, NULL);
393 }
394
395 return -EINVAL;
396}
397
8ee1c3db
MG		 398static u32 asle_set_backlight(struct drm_device *dev, u32 bclp)
399{
400 struct drm_i915_private *dev_priv = dev->dev_private;
c91c9f32 401 struct intel_connector *intel_connector;
5bc4418b 402 struct opregion_asle __iomem *asle = dev_priv->opregion.asle;
8ee1c3db 403
749052fb
JN		 404 DRM_DEBUG_DRIVER("bclp = 0x%08x\n", bclp);
405
8ee1c3db 406 if (!(bclp & ASLE_BCLP_VALID))
507c1a45 407 return ASLC_BACKLIGHT_FAILED;
8ee1c3db
MG		 408
409 bclp &= ASLE_BCLP_MSK;
a9573556 410 if (bclp > 255)
507c1a45 411 return ASLC_BACKLIGHT_FAILED;
8ee1c3db 412
6e9f798d 413 mutex_lock(&dev->mode_config.connection_mutex);
c91c9f32 414
752aa88a 415 /*
c91c9f32
JN		 416 * Update backlight on all connectors that support backlight (usually
417 * only one).
752aa88a 418 */
540b5d02 419 DRM_DEBUG_KMS("updating opregion backlight %d/255\n", bclp);
dc5a4363
VS		 420 list_for_each_entry(intel_connector, &dev->mode_config.connector_list, base.head)
421 intel_panel_set_backlight(intel_connector, bclp, 255);
cac6a5ae 422 iowrite32(DIV_ROUND_UP(bclp * 100, 255) | ASLE_CBLV_VALID, &asle->cblv);
8ee1c3db 423
6e9f798d 424 mutex_unlock(&dev->mode_config.connection_mutex);
752aa88a 425
c91c9f32
JN		 426
427 return 0;
8ee1c3db
MG		 428}
429
430static u32 asle_set_als_illum(struct drm_device *dev, u32 alsi)
431{
432 /* alsi is the current ALS reading in lux. 0 indicates below sensor
433 range, 0xffff indicates above sensor range. 1-0xfffe are valid */
e93d440b 434 DRM_DEBUG_DRIVER("Illum is not supported\n");
507c1a45 435 return ASLC_ALS_ILLUM_FAILED;
8ee1c3db
MG		 436}
437
438static u32 asle_set_pwm_freq(struct drm_device *dev, u32 pfmb)
439{
e93d440b 440 DRM_DEBUG_DRIVER("PWM freq is not supported\n");
507c1a45 441 return ASLC_PWM_FREQ_FAILED;
8ee1c3db
MG		 442}
443
444static u32 asle_set_pfit(struct drm_device *dev, u32 pfit)
445{
446 /* Panel fitting is currently controlled by the X code, so this is a
447 noop until modesetting support works fully */
e93d440b 448 DRM_DEBUG_DRIVER("Pfit is not supported\n");
507c1a45
PZ		 449 return ASLC_PFIT_FAILED;
450}
451
452static u32 asle_set_supported_rotation_angles(struct drm_device *dev, u32 srot)
453{
454 DRM_DEBUG_DRIVER("SROT is not supported\n");
455 return ASLC_ROTATION_ANGLES_FAILED;
456}
457
458static u32 asle_set_button_array(struct drm_device *dev, u32 iuer)
459{
460 if (!iuer)
461 DRM_DEBUG_DRIVER("Button array event is not supported (nothing)\n");
462 if (iuer & ASLE_IUER_ROTATION_LOCK_BTN)
463 DRM_DEBUG_DRIVER("Button array event is not supported (rotation lock)\n");
464 if (iuer & ASLE_IUER_VOLUME_DOWN_BTN)
465 DRM_DEBUG_DRIVER("Button array event is not supported (volume down)\n");
466 if (iuer & ASLE_IUER_VOLUME_UP_BTN)
467 DRM_DEBUG_DRIVER("Button array event is not supported (volume up)\n");
468 if (iuer & ASLE_IUER_WINDOWS_BTN)
469 DRM_DEBUG_DRIVER("Button array event is not supported (windows)\n");
470 if (iuer & ASLE_IUER_POWER_BTN)
471 DRM_DEBUG_DRIVER("Button array event is not supported (power)\n");
472
473 return ASLC_BUTTON_ARRAY_FAILED;
474}
475
476static u32 asle_set_convertible(struct drm_device *dev, u32 iuer)
477{
478 if (iuer & ASLE_IUER_CONVERTIBLE)
479 DRM_DEBUG_DRIVER("Convertible is not supported (clamshell)\n");
480 else
481 DRM_DEBUG_DRIVER("Convertible is not supported (slate)\n");
482
483 return ASLC_CONVERTIBLE_FAILED;
484}
485
486static u32 asle_set_docking(struct drm_device *dev, u32 iuer)
487{
488 if (iuer & ASLE_IUER_DOCKING)
489 DRM_DEBUG_DRIVER("Docking is not supported (docked)\n");
490 else
491 DRM_DEBUG_DRIVER("Docking is not supported (undocked)\n");
492
493 return ASLC_DOCKING_FAILED;
494}
495
496static u32 asle_isct_state(struct drm_device *dev)
497{
498 DRM_DEBUG_DRIVER("ISCT is not supported\n");
499 return ASLC_ISCT_STATE_FAILED;
8ee1c3db
MG		 500}
501
91a60f20 502static void asle_work(struct work_struct *work)
8ee1c3db 503{
91a60f20
JN		 504 struct intel_opregion *opregion =
505 container_of(work, struct intel_opregion, asle_work);
506 struct drm_i915_private *dev_priv =
507 container_of(opregion, struct drm_i915_private, opregion);
508 struct drm_device *dev = dev_priv->dev;
5bc4418b 509 struct opregion_asle __iomem *asle = dev_priv->opregion.asle;
507c1a45
PZ		 510 u32 aslc_stat = 0;
511 u32 aslc_req;
8ee1c3db
MG		 512
513 if (!asle)
514 return;
515
507c1a45 516 aslc_req = ioread32(&asle->aslc);
8ee1c3db 517
507c1a45
PZ		 518 if (!(aslc_req & ASLC_REQ_MSK)) {
519 DRM_DEBUG_DRIVER("No request on ASLC interrupt 0x%08x\n",
520 aslc_req);
8ee1c3db
MG		 521 return;
522 }
523
507c1a45
PZ		 524 if (aslc_req & ASLC_SET_ALS_ILLUM)
525 aslc_stat |= asle_set_als_illum(dev, ioread32(&asle->alsi));
526
527 if (aslc_req & ASLC_SET_BACKLIGHT)
528 aslc_stat |= asle_set_backlight(dev, ioread32(&asle->bclp));
529
530 if (aslc_req & ASLC_SET_PFIT)
531 aslc_stat |= asle_set_pfit(dev, ioread32(&asle->pfit));
532
533 if (aslc_req & ASLC_SET_PWM_FREQ)
534 aslc_stat |= asle_set_pwm_freq(dev, ioread32(&asle->pfmb));
535
536 if (aslc_req & ASLC_SUPPORTED_ROTATION_ANGLES)
537 aslc_stat |= asle_set_supported_rotation_angles(dev,
538 ioread32(&asle->srot));
539
540 if (aslc_req & ASLC_BUTTON_ARRAY)
541 aslc_stat |= asle_set_button_array(dev, ioread32(&asle->iuer));
8ee1c3db 542
507c1a45
PZ		 543 if (aslc_req & ASLC_CONVERTIBLE_INDICATOR)
544 aslc_stat |= asle_set_convertible(dev, ioread32(&asle->iuer));
8ee1c3db 545
507c1a45
PZ		 546 if (aslc_req & ASLC_DOCKING_INDICATOR)
547 aslc_stat |= asle_set_docking(dev, ioread32(&asle->iuer));
8ee1c3db 548
507c1a45
PZ		 549 if (aslc_req & ASLC_ISCT_STATE_CHANGE)
550 aslc_stat |= asle_isct_state(dev);
8ee1c3db 551
507c1a45 552 iowrite32(aslc_stat, &asle->aslc);
8ee1c3db
MG		 553}
554
91a60f20
JN		 555void intel_opregion_asle_intr(struct drm_device *dev)
556{
557 struct drm_i915_private *dev_priv = dev->dev_private;
558
559 if (dev_priv->opregion.asle)
560 schedule_work(&dev_priv->opregion.asle_work);
561}
562
8ee1c3db
MG		 563#define ACPI_EV_DISPLAY_SWITCH (1<<0)
564#define ACPI_EV_LID (1<<1)
565#define ACPI_EV_DOCK (1<<2)
566
567static struct intel_opregion *system_opregion;
568
b358d0a6
HE		 569static int intel_opregion_video_event(struct notifier_block *nb,
570 unsigned long val, void *data)
8ee1c3db
MG		 571{
572 /* The only video events relevant to opregion are 0x80. These indicate
573 either a docking event, lid switch or display switch request. In
574 Linux, these are handled by the dock, button and video drivers.
f5a3d0c4 575 */
8ee1c3db 576
5bc4418b 577 struct opregion_acpi __iomem *acpi;
f5a3d0c4
MG		 578 struct acpi_bus_event *event = data;
579 int ret = NOTIFY_OK;
580
581 if (strcmp(event->device_class, ACPI_VIDEO_CLASS) != 0)
582 return NOTIFY_DONE;
8ee1c3db
MG		 583
584 if (!system_opregion)
585 return NOTIFY_DONE;
586
587 acpi = system_opregion->acpi;
f5a3d0c4 588
5bc4418b
BW		 589 if (event->type == 0x80 &&
590 (ioread32(&acpi->cevt) & 1) == 0)
f5a3d0c4
MG		 591 ret = NOTIFY_BAD;
592
5bc4418b 593 iowrite32(0, &acpi->csts);
8ee1c3db 594
f5a3d0c4 595 return ret;
8ee1c3db
MG		 596}
597
598static struct notifier_block intel_opregion_notifier = {
599 .notifier_call = intel_opregion_video_event,
600};
601
74a365b3
MG		 602/*
603 * Initialise the DIDL field in opregion. This passes a list of devices to
604 * the firmware. Values are defined by section B.4.2 of the ACPI specification
605 * (version 3)
606 */
607
608static void intel_didl_outputs(struct drm_device *dev)
609{
610 struct drm_i915_private *dev_priv = dev->dev_private;
611 struct intel_opregion *opregion = &dev_priv->opregion;
612 struct drm_connector *connector;
3143751f
ZR		 613 acpi_handle handle;
614 struct acpi_device *acpi_dev, *acpi_cdev, *acpi_video_bus = NULL;
615 unsigned long long device_id;
616 acpi_status status;
5bc4418b 617 u32 temp;
74a365b3
MG		 618 int i = 0;
619
3a83f992 620 handle = ACPI_HANDLE(&dev->pdev->dev);
7d37beaa 621 if (!handle || acpi_bus_get_device(handle, &acpi_dev))
3143751f
ZR		 622 return;
623
d4e1a692 624 if (acpi_is_video_device(handle))
3143751f
ZR		 625 acpi_video_bus = acpi_dev;
626 else {
627 list_for_each_entry(acpi_cdev, &acpi_dev->children, node) {
d4e1a692 628 if (acpi_is_video_device(acpi_cdev->handle)) {
3143751f
ZR		 629 acpi_video_bus = acpi_cdev;
630 break;
631 }
632 }
633 }
634
635 if (!acpi_video_bus) {
a70491cc 636 pr_warn("No ACPI video bus found\n");
3143751f
ZR		 637 return;
638 }
639
640 list_for_each_entry(acpi_cdev, &acpi_video_bus->children, node) {
641 if (i >= 8) {
0f4f7b57
DV		 642 dev_dbg(&dev->pdev->dev,
643 "More than 8 outputs detected via ACPI\n");
3143751f
ZR		 644 return;
645 }
646 status =
647 acpi_evaluate_integer(acpi_cdev->handle, "_ADR",
648 NULL, &device_id);
649 if (ACPI_SUCCESS(status)) {
650 if (!device_id)
651 goto blind_set;
5bc4418b
BW		 652 iowrite32((u32)(device_id & 0x0f0f),
653 &opregion->acpi->didl[i]);
3143751f
ZR		 654 i++;
655 }
656 }
657
658end:
659 /* If fewer than 8 outputs, the list must be null terminated */
660 if (i < 8)
5bc4418b 661 iowrite32(0, &opregion->acpi->didl[i]);
3143751f
ZR		 662 return;
663
664blind_set:
665 i = 0;
74a365b3
MG		 666 list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
667 int output_type = ACPI_OTHER_OUTPUT;
668 if (i >= 8) {
0f4f7b57
DV		 669 dev_dbg(&dev->pdev->dev,
670 "More than 8 outputs in connector list\n");
74a365b3
MG		 671 return;
672 }
673 switch (connector->connector_type) {
674 case DRM_MODE_CONNECTOR_VGA:
675 case DRM_MODE_CONNECTOR_DVIA:
676 output_type = ACPI_VGA_OUTPUT;
677 break;
678 case DRM_MODE_CONNECTOR_Composite:
679 case DRM_MODE_CONNECTOR_SVIDEO:
680 case DRM_MODE_CONNECTOR_Component:
681 case DRM_MODE_CONNECTOR_9PinDIN:
682 output_type = ACPI_TV_OUTPUT;
683 break;
684 case DRM_MODE_CONNECTOR_DVII:
685 case DRM_MODE_CONNECTOR_DVID:
686 case DRM_MODE_CONNECTOR_DisplayPort:
687 case DRM_MODE_CONNECTOR_HDMIA:
688 case DRM_MODE_CONNECTOR_HDMIB:
689 output_type = ACPI_DIGITAL_OUTPUT;
690 break;
691 case DRM_MODE_CONNECTOR_LVDS:
692 output_type = ACPI_LVDS_OUTPUT;
693 break;
694 }
5bc4418b
BW		 695 temp = ioread32(&opregion->acpi->didl[i]);
696 iowrite32(temp | (1<<31) | output_type | i,
697 &opregion->acpi->didl[i]);
74a365b3
MG		 698 i++;
699 }
3143751f 700 goto end;
74a365b3
MG		 701}
702
d627b62f
L		 703static void intel_setup_cadls(struct drm_device *dev)
704{
705 struct drm_i915_private *dev_priv = dev->dev_private;
706 struct intel_opregion *opregion = &dev_priv->opregion;
707 int i = 0;
708 u32 disp_id;
709
710 /* Initialize the CADL field by duplicating the DIDL values.
711 * Technically, this is not always correct as display outputs may exist,
712 * but not active. This initialization is necessary for some Clevo
713 * laptops that check this field before processing the brightness and
714 * display switching hotkeys. Just like DIDL, CADL is NULL-terminated if
715 * there are less than eight devices. */
716 do {
717 disp_id = ioread32(&opregion->acpi->didl[i]);
718 iowrite32(disp_id, &opregion->acpi->cadl[i]);
719 } while (++i < 8 && disp_id != 0);
720}
721
44834a67
CW		 722void intel_opregion_init(struct drm_device *dev)
723{
724 struct drm_i915_private *dev_priv = dev->dev_private;
725 struct intel_opregion *opregion = &dev_priv->opregion;
726
727 if (!opregion->header)
728 return;
729
730 if (opregion->acpi) {
d627b62f 731 if (drm_core_check_feature(dev, DRIVER_MODESET)) {
44834a67 732 intel_didl_outputs(dev);
d627b62f
L		 733 intel_setup_cadls(dev);
734 }
44834a67
CW		 735
736 /* Notify BIOS we are ready to handle ACPI video ext notifs.
737 * Right now, all the events are handled by the ACPI video module.
738 * We don't actually need to do anything with them. */
5bc4418b
BW		 739 iowrite32(0, &opregion->acpi->csts);
740 iowrite32(1, &opregion->acpi->drdy);
44834a67
CW		 741
742 system_opregion = opregion;
743 register_acpi_notifier(&intel_opregion_notifier);
744 }
745
68bca4b0 746 if (opregion->asle) {
68bca4b0
JN		 747 iowrite32(ASLE_TCHE_BLC_EN, &opregion->asle->tche);
748 iowrite32(ASLE_ARDY_READY, &opregion->asle->ardy);
749 }
44834a67
CW		 750}
751
752void intel_opregion_fini(struct drm_device *dev)
753{
754 struct drm_i915_private *dev_priv = dev->dev_private;
755 struct intel_opregion *opregion = &dev_priv->opregion;
756
757 if (!opregion->header)
758 return;
759
68bca4b0
JN		 760 if (opregion->asle)
761 iowrite32(ASLE_ARDY_NOT_READY, &opregion->asle->ardy);
762
91a60f20
JN		 763 cancel_work_sync(&dev_priv->opregion.asle_work);
764
44834a67 765 if (opregion->acpi) {
5bc4418b 766 iowrite32(0, &opregion->acpi->drdy);
44834a67
CW		 767
768 system_opregion = NULL;
769 unregister_acpi_notifier(&intel_opregion_notifier);
770 }
771
772 /* just clear all opregion memory pointers now */
773 iounmap(opregion->header);
774 opregion->header = NULL;
775 opregion->acpi = NULL;
776 opregion->swsci = NULL;
777 opregion->asle = NULL;
778 opregion->vbt = NULL;
794a79a6 779 opregion->lid_state = NULL;
44834a67 780}
ebde53c7
JN		 781
782static void swsci_setup(struct drm_device *dev)
783{
784 struct drm_i915_private *dev_priv = dev->dev_private;
785 struct intel_opregion *opregion = &dev_priv->opregion;
786 bool requested_callbacks = false;
787 u32 tmp;
788
789 /* Sub-function code 0 is okay, let's allow them. */
790 opregion->swsci_gbda_sub_functions = 1;
791 opregion->swsci_sbcb_sub_functions = 1;
792
793 /* We use GBDA to ask for supported GBDA calls. */
794 if (swsci(dev, SWSCI_GBDA_SUPPORTED_CALLS, 0, &tmp) == 0) {
795 /* make the bits match the sub-function codes */
796 tmp <<= 1;
797 opregion->swsci_gbda_sub_functions |= tmp;
798 }
799
800 /*
801 * We also use GBDA to ask for _requested_ SBCB callbacks. The driver
802 * must not call interfaces that are not specifically requested by the
803 * bios.
804 */
805 if (swsci(dev, SWSCI_GBDA_REQUESTED_CALLBACKS, 0, &tmp) == 0) {
806 /* here, the bits already match sub-function codes */
807 opregion->swsci_sbcb_sub_functions |= tmp;
808 requested_callbacks = true;
809 }
810
811 /*
812 * But we use SBCB to ask for _supported_ SBCB calls. This does not mean
813 * the callback is _requested_. But we still can't call interfaces that
814 * are not requested.
815 */
816 if (swsci(dev, SWSCI_SBCB_SUPPORTED_CALLBACKS, 0, &tmp) == 0) {
817 /* make the bits match the sub-function codes */
818 u32 low = tmp & 0x7ff;
819 u32 high = tmp & ~0xfff; /* bit 11 is reserved */
820 tmp = (high << 4) | (low << 1) | 1;
821
822 /* best guess what to do with supported wrt requested */
823 if (requested_callbacks) {
824 u32 req = opregion->swsci_sbcb_sub_functions;
825 if ((req & tmp) != req)
826 DRM_DEBUG_DRIVER("SWSCI BIOS requested (%08x) SBCB callbacks that are not supported (%08x)\n", req, tmp);
827 /* XXX: for now, trust the requested callbacks */
828 /* opregion->swsci_sbcb_sub_functions &= tmp; */
829 } else {
830 opregion->swsci_sbcb_sub_functions |= tmp;
831 }
832 }
833
834 DRM_DEBUG_DRIVER("SWSCI GBDA callbacks %08x, SBCB callbacks %08x\n",
835 opregion->swsci_gbda_sub_functions,
836 opregion->swsci_sbcb_sub_functions);
837}
838#else /* CONFIG_ACPI */
839static inline void swsci_setup(struct drm_device *dev) {}
840#endif /* CONFIG_ACPI */
44834a67
CW		 841
842int intel_opregion_setup(struct drm_device *dev)
8ee1c3db
MG		 843{
844 struct drm_i915_private *dev_priv = dev->dev_private;
845 struct intel_opregion *opregion = &dev_priv->opregion;
5bc4418b 846 void __iomem *base;
8ee1c3db 847 u32 asls, mboxes;
5bc4418b 848 char buf[sizeof(OPREGION_SIGNATURE)];
8ee1c3db
MG		 849 int err = 0;
850
851 pci_read_config_dword(dev->pdev, PCI_ASLS, &asls);
44d98a61 852 DRM_DEBUG_DRIVER("graphic opregion physical addr: 0x%x\n", asls);
8ee1c3db 853 if (asls == 0) {
44d98a61 854 DRM_DEBUG_DRIVER("ACPI OpRegion not supported!\n");
8ee1c3db
MG		 855 return -ENOTSUPP;
856 }
857
1dca220b 858#ifdef CONFIG_ACPI
91a60f20 859 INIT_WORK(&opregion->asle_work, asle_work);
1dca220b 860#endif
91a60f20 861
b705120e 862 base = acpi_os_ioremap(asls, OPREGION_SIZE);
8ee1c3db
MG		 863 if (!base)
864 return -ENOMEM;
865
5bc4418b
BW		 866 memcpy_fromio(buf, base, sizeof(buf));
867
868 if (memcmp(buf, OPREGION_SIGNATURE, 16)) {
44d98a61 869 DRM_DEBUG_DRIVER("opregion signature mismatch\n");
8ee1c3db
MG		 870 err = -EINVAL;
871 goto err_out;
872 }
44834a67
CW		 873 opregion->header = base;
874 opregion->vbt = base + OPREGION_VBT_OFFSET;
8ee1c3db 875
82d3c90c 876 opregion->lid_state = base + ACPI_CLID;
01fe9dbd 877
5bc4418b 878 mboxes = ioread32(&opregion->header->mboxes);
8ee1c3db 879 if (mboxes & MBOX_ACPI) {
44d98a61 880 DRM_DEBUG_DRIVER("Public ACPI methods supported\n");
8ee1c3db 881 opregion->acpi = base + OPREGION_ACPI_OFFSET;
8ee1c3db 882 }
8ee1c3db
MG		 883
884 if (mboxes & MBOX_SWSCI) {
44d98a61 885 DRM_DEBUG_DRIVER("SWSCI supported\n");
8ee1c3db 886 opregion->swsci = base + OPREGION_SWSCI_OFFSET;
ebde53c7 887 swsci_setup(dev);
8ee1c3db
MG		 888 }
889 if (mboxes & MBOX_ASLE) {
44d98a61 890 DRM_DEBUG_DRIVER("ASLE supported\n");
8ee1c3db 891 opregion->asle = base + OPREGION_ASLE_OFFSET;
68bca4b0
JN		 892
893 iowrite32(ASLE_ARDY_NOT_READY, &opregion->asle->ardy);
8ee1c3db
MG		 894 }
895
8ee1c3db
MG		 896 return 0;
897
898err_out:
30c56660 899 iounmap(base);
8ee1c3db
MG		 900 return err;
901}
Linux 6.x block layer and io_uring tree(s)