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drm: add DRM_INFO_ONCE() to print a one-time DRM_INFO() message
[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>
b705120e 31#include <linux/acpi_io.h>
74a365b3 32#include <acpi/video.h>
8ee1c3db 33
760285e7
DH		 34#include <drm/drmP.h>
35#include <drm/i915_drm.h>
8ee1c3db 36#include "i915_drv.h"
a9573556 37#include "intel_drv.h"
8ee1c3db 38
ebde53c7
JN		 39#define PCI_ASLE 0xe4
40#define PCI_ASLS 0xfc
41#define PCI_SWSCI 0xe8
42#define PCI_SWSCI_SCISEL (1 << 15)
43#define PCI_SWSCI_GSSCIE (1 << 0)
8ee1c3db 44
8ee1c3db
MG		 45#define OPREGION_HEADER_OFFSET 0
46#define OPREGION_ACPI_OFFSET 0x100
82d3c90c
CW		 47#define ACPI_CLID 0x01ac /* current lid state indicator */
48#define ACPI_CDCK 0x01b0 /* current docking state indicator */
8ee1c3db
MG		 49#define OPREGION_SWSCI_OFFSET 0x200
50#define OPREGION_ASLE_OFFSET 0x300
44834a67 51#define OPREGION_VBT_OFFSET 0x400
8ee1c3db
MG		 52
53#define OPREGION_SIGNATURE "IntelGraphicsMem"
54#define MBOX_ACPI (1<<0)
55#define MBOX_SWSCI (1<<1)
56#define MBOX_ASLE (1<<2)
57
58struct opregion_header {
0206e353
AJ		 59 u8 signature[16];
60 u32 size;
61 u32 opregion_ver;
62 u8 bios_ver[32];
63 u8 vbios_ver[16];
64 u8 driver_ver[16];
65 u32 mboxes;
66 u8 reserved[164];
e4451239 67} __packed;
8ee1c3db
MG		 68
69/* OpRegion mailbox #1: public ACPI methods */
70struct opregion_acpi {
0206e353
AJ		 71 u32 drdy; /* driver readiness */
72 u32 csts; /* notification status */
73 u32 cevt; /* current event */
74 u8 rsvd1[20];
75 u32 didl[8]; /* supported display devices ID list */
76 u32 cpdl[8]; /* currently presented display list */
77 u32 cadl[8]; /* currently active display list */
78 u32 nadl[8]; /* next active devices list */
79 u32 aslp; /* ASL sleep time-out */
80 u32 tidx; /* toggle table index */
81 u32 chpd; /* current hotplug enable indicator */
82 u32 clid; /* current lid state*/
83 u32 cdck; /* current docking state */
84 u32 sxsw; /* Sx state resume */
85 u32 evts; /* ASL supported events */
86 u32 cnot; /* current OS notification */
87 u32 nrdy; /* driver status */
88 u8 rsvd2[60];
e4451239 89} __packed;
8ee1c3db
MG		 90
91/* OpRegion mailbox #2: SWSCI */
92struct opregion_swsci {
0206e353
AJ		 93 u32 scic; /* SWSCI command|status|data */
94 u32 parm; /* command parameters */
95 u32 dslp; /* driver sleep time-out */
96 u8 rsvd[244];
e4451239 97} __packed;
8ee1c3db
MG		 98
99/* OpRegion mailbox #3: ASLE */
100struct opregion_asle {
0206e353
AJ		 101 u32 ardy; /* driver readiness */
102 u32 aslc; /* ASLE interrupt command */
103 u32 tche; /* technology enabled indicator */
104 u32 alsi; /* current ALS illuminance reading */
105 u32 bclp; /* backlight brightness to set */
106 u32 pfit; /* panel fitting state */
107 u32 cblv; /* current brightness level */
108 u16 bclm[20]; /* backlight level duty cycle mapping table */
109 u32 cpfm; /* current panel fitting mode */
110 u32 epfm; /* enabled panel fitting modes */
111 u8 plut[74]; /* panel LUT and identifier */
112 u32 pfmb; /* PWM freq and min brightness */
507c1a45
PZ		 113 u32 cddv; /* color correction default values */
114 u32 pcft; /* power conservation features */
115 u32 srot; /* supported rotation angles */
116 u32 iuer; /* IUER events */
117 u8 rsvd[86];
e4451239 118} __packed;
8ee1c3db 119
68bca4b0
JN		 120/* Driver readiness indicator */
121#define ASLE_ARDY_READY (1 << 0)
122#define ASLE_ARDY_NOT_READY (0 << 0)
123
507c1a45
PZ		 124/* ASLE Interrupt Command (ASLC) bits */
125#define ASLC_SET_ALS_ILLUM (1 << 0)
126#define ASLC_SET_BACKLIGHT (1 << 1)
127#define ASLC_SET_PFIT (1 << 2)
128#define ASLC_SET_PWM_FREQ (1 << 3)
129#define ASLC_SUPPORTED_ROTATION_ANGLES (1 << 4)
130#define ASLC_BUTTON_ARRAY (1 << 5)
131#define ASLC_CONVERTIBLE_INDICATOR (1 << 6)
132#define ASLC_DOCKING_INDICATOR (1 << 7)
133#define ASLC_ISCT_STATE_CHANGE (1 << 8)
134#define ASLC_REQ_MSK 0x1ff
135/* response bits */
136#define ASLC_ALS_ILLUM_FAILED (1 << 10)
137#define ASLC_BACKLIGHT_FAILED (1 << 12)
138#define ASLC_PFIT_FAILED (1 << 14)
139#define ASLC_PWM_FREQ_FAILED (1 << 16)
140#define ASLC_ROTATION_ANGLES_FAILED (1 << 18)
141#define ASLC_BUTTON_ARRAY_FAILED (1 << 20)
142#define ASLC_CONVERTIBLE_FAILED (1 << 22)
143#define ASLC_DOCKING_FAILED (1 << 24)
144#define ASLC_ISCT_STATE_FAILED (1 << 26)
8ee1c3db 145
f599cc29
JN		 146/* Technology enabled indicator */
147#define ASLE_TCHE_ALS_EN (1 << 0)
148#define ASLE_TCHE_BLC_EN (1 << 1)
149#define ASLE_TCHE_PFIT_EN (1 << 2)
150#define ASLE_TCHE_PFMB_EN (1 << 3)
151
8ee1c3db
MG		 152/* ASLE backlight brightness to set */
153#define ASLE_BCLP_VALID (1<<31)
154#define ASLE_BCLP_MSK (~(1<<31))
155
156/* ASLE panel fitting request */
157#define ASLE_PFIT_VALID (1<<31)
158#define ASLE_PFIT_CENTER (1<<0)
159#define ASLE_PFIT_STRETCH_TEXT (1<<1)
160#define ASLE_PFIT_STRETCH_GFX (1<<2)
161
162/* PWM frequency and minimum brightness */
163#define ASLE_PFMB_BRIGHTNESS_MASK (0xff)
164#define ASLE_PFMB_BRIGHTNESS_VALID (1<<8)
165#define ASLE_PFMB_PWM_MASK (0x7ffffe00)
166#define ASLE_PFMB_PWM_VALID (1<<31)
167
168#define ASLE_CBLV_VALID (1<<31)
169
507c1a45
PZ		 170/* IUER */
171#define ASLE_IUER_DOCKING (1 << 7)
172#define ASLE_IUER_CONVERTIBLE (1 << 6)
173#define ASLE_IUER_ROTATION_LOCK_BTN (1 << 4)
174#define ASLE_IUER_VOLUME_DOWN_BTN (1 << 3)
175#define ASLE_IUER_VOLUME_UP_BTN (1 << 2)
176#define ASLE_IUER_WINDOWS_BTN (1 << 1)
177#define ASLE_IUER_POWER_BTN (1 << 0)
178
ebde53c7
JN		 179/* Software System Control Interrupt (SWSCI) */
180#define SWSCI_SCIC_INDICATOR (1 << 0)
181#define SWSCI_SCIC_MAIN_FUNCTION_SHIFT 1
182#define SWSCI_SCIC_MAIN_FUNCTION_MASK (0xf << 1)
183#define SWSCI_SCIC_SUB_FUNCTION_SHIFT 8
184#define SWSCI_SCIC_SUB_FUNCTION_MASK (0xff << 8)
185#define SWSCI_SCIC_EXIT_PARAMETER_SHIFT 8
186#define SWSCI_SCIC_EXIT_PARAMETER_MASK (0xff << 8)
187#define SWSCI_SCIC_EXIT_STATUS_SHIFT 5
188#define SWSCI_SCIC_EXIT_STATUS_MASK (7 << 5)
189#define SWSCI_SCIC_EXIT_STATUS_SUCCESS 1
190
191#define SWSCI_FUNCTION_CODE(main, sub) \
192 ((main) << SWSCI_SCIC_MAIN_FUNCTION_SHIFT | \
193 (sub) << SWSCI_SCIC_SUB_FUNCTION_SHIFT)
194
195/* SWSCI: Get BIOS Data (GBDA) */
196#define SWSCI_GBDA 4
197#define SWSCI_GBDA_SUPPORTED_CALLS SWSCI_FUNCTION_CODE(SWSCI_GBDA, 0)
198#define SWSCI_GBDA_REQUESTED_CALLBACKS SWSCI_FUNCTION_CODE(SWSCI_GBDA, 1)
199#define SWSCI_GBDA_BOOT_DISPLAY_PREF SWSCI_FUNCTION_CODE(SWSCI_GBDA, 4)
200#define SWSCI_GBDA_PANEL_DETAILS SWSCI_FUNCTION_CODE(SWSCI_GBDA, 5)
201#define SWSCI_GBDA_TV_STANDARD SWSCI_FUNCTION_CODE(SWSCI_GBDA, 6)
202#define SWSCI_GBDA_INTERNAL_GRAPHICS SWSCI_FUNCTION_CODE(SWSCI_GBDA, 7)
203#define SWSCI_GBDA_SPREAD_SPECTRUM SWSCI_FUNCTION_CODE(SWSCI_GBDA, 10)
204
205/* SWSCI: System BIOS Callbacks (SBCB) */
206#define SWSCI_SBCB 6
207#define SWSCI_SBCB_SUPPORTED_CALLBACKS SWSCI_FUNCTION_CODE(SWSCI_SBCB, 0)
208#define SWSCI_SBCB_INIT_COMPLETION SWSCI_FUNCTION_CODE(SWSCI_SBCB, 1)
209#define SWSCI_SBCB_PRE_HIRES_SET_MODE SWSCI_FUNCTION_CODE(SWSCI_SBCB, 3)
210#define SWSCI_SBCB_POST_HIRES_SET_MODE SWSCI_FUNCTION_CODE(SWSCI_SBCB, 4)
211#define SWSCI_SBCB_DISPLAY_SWITCH SWSCI_FUNCTION_CODE(SWSCI_SBCB, 5)
212#define SWSCI_SBCB_SET_TV_FORMAT SWSCI_FUNCTION_CODE(SWSCI_SBCB, 6)
213#define SWSCI_SBCB_ADAPTER_POWER_STATE SWSCI_FUNCTION_CODE(SWSCI_SBCB, 7)
214#define SWSCI_SBCB_DISPLAY_POWER_STATE SWSCI_FUNCTION_CODE(SWSCI_SBCB, 8)
215#define SWSCI_SBCB_SET_BOOT_DISPLAY SWSCI_FUNCTION_CODE(SWSCI_SBCB, 9)
216#define SWSCI_SBCB_SET_PANEL_DETAILS SWSCI_FUNCTION_CODE(SWSCI_SBCB, 10)
217#define SWSCI_SBCB_SET_INTERNAL_GFX SWSCI_FUNCTION_CODE(SWSCI_SBCB, 11)
218#define SWSCI_SBCB_POST_HIRES_TO_DOS_FS SWSCI_FUNCTION_CODE(SWSCI_SBCB, 16)
219#define SWSCI_SBCB_SUSPEND_RESUME SWSCI_FUNCTION_CODE(SWSCI_SBCB, 17)
220#define SWSCI_SBCB_SET_SPREAD_SPECTRUM SWSCI_FUNCTION_CODE(SWSCI_SBCB, 18)
221#define SWSCI_SBCB_POST_VBE_PM SWSCI_FUNCTION_CODE(SWSCI_SBCB, 19)
222#define SWSCI_SBCB_ENABLE_DISABLE_AUDIO SWSCI_FUNCTION_CODE(SWSCI_SBCB, 21)
223
74a365b3
MG		 224#define ACPI_OTHER_OUTPUT (0<<8)
225#define ACPI_VGA_OUTPUT (1<<8)
226#define ACPI_TV_OUTPUT (2<<8)
227#define ACPI_DIGITAL_OUTPUT (3<<8)
228#define ACPI_LVDS_OUTPUT (4<<8)
229
44834a67 230#ifdef CONFIG_ACPI
ebde53c7
JN		 231static int swsci(struct drm_device *dev, u32 function, u32 parm, u32 *parm_out)
232{
233 struct drm_i915_private *dev_priv = dev->dev_private;
234 struct opregion_swsci __iomem *swsci = dev_priv->opregion.swsci;
235 u32 main_function, sub_function, scic;
236 u16 pci_swsci;
237 u32 dslp;
238
239 if (!swsci)
240 return -ENODEV;
241
242 main_function = (function & SWSCI_SCIC_MAIN_FUNCTION_MASK) >>
243 SWSCI_SCIC_MAIN_FUNCTION_SHIFT;
244 sub_function = (function & SWSCI_SCIC_SUB_FUNCTION_MASK) >>
245 SWSCI_SCIC_SUB_FUNCTION_SHIFT;
246
247 /* Check if we can call the function. See swsci_setup for details. */
248 if (main_function == SWSCI_SBCB) {
249 if ((dev_priv->opregion.swsci_sbcb_sub_functions &
250 (1 << sub_function)) == 0)
251 return -EINVAL;
252 } else if (main_function == SWSCI_GBDA) {
253 if ((dev_priv->opregion.swsci_gbda_sub_functions &
254 (1 << sub_function)) == 0)
255 return -EINVAL;
256 }
257
258 /* Driver sleep timeout in ms. */
259 dslp = ioread32(&swsci->dslp);
260 if (!dslp) {
4994aa8c
PZ		 261 /* The spec says 2ms should be the default, but it's too small
262 * for some machines. */
263 dslp = 50;
ebde53c7
JN		 264 } else if (dslp > 500) {
265 /* Hey bios, trust must be earned. */
266 WARN_ONCE(1, "excessive driver sleep timeout (DSPL) %u\n", dslp);
267 dslp = 500;
268 }
269
270 /* The spec tells us to do this, but we are the only user... */
271 scic = ioread32(&swsci->scic);
272 if (scic & SWSCI_SCIC_INDICATOR) {
273 DRM_DEBUG_DRIVER("SWSCI request already in progress\n");
274 return -EBUSY;
275 }
276
277 scic = function | SWSCI_SCIC_INDICATOR;
278
279 iowrite32(parm, &swsci->parm);
280 iowrite32(scic, &swsci->scic);
281
282 /* Ensure SCI event is selected and event trigger is cleared. */
283 pci_read_config_word(dev->pdev, PCI_SWSCI, &pci_swsci);
284 if (!(pci_swsci & PCI_SWSCI_SCISEL) || (pci_swsci & PCI_SWSCI_GSSCIE)) {
285 pci_swsci |= PCI_SWSCI_SCISEL;
286 pci_swsci &= ~PCI_SWSCI_GSSCIE;
287 pci_write_config_word(dev->pdev, PCI_SWSCI, pci_swsci);
288 }
289
290 /* Use event trigger to tell bios to check the mail. */
291 pci_swsci |= PCI_SWSCI_GSSCIE;
292 pci_write_config_word(dev->pdev, PCI_SWSCI, pci_swsci);
293
294 /* Poll for the result. */
295#define C (((scic = ioread32(&swsci->scic)) & SWSCI_SCIC_INDICATOR) == 0)
296 if (wait_for(C, dslp)) {
297 DRM_DEBUG_DRIVER("SWSCI request timed out\n");
298 return -ETIMEDOUT;
299 }
300
301 scic = (scic & SWSCI_SCIC_EXIT_STATUS_MASK) >>
302 SWSCI_SCIC_EXIT_STATUS_SHIFT;
303
304 /* Note: scic == 0 is an error! */
305 if (scic != SWSCI_SCIC_EXIT_STATUS_SUCCESS) {
306 DRM_DEBUG_DRIVER("SWSCI request error %u\n", scic);
307 return -EIO;
308 }
309
310 if (parm_out)
311 *parm_out = ioread32(&swsci->parm);
312
313 return 0;
314
315#undef C
316}
317
9c4b0a68
JN		 318#define DISPLAY_TYPE_CRT 0
319#define DISPLAY_TYPE_TV 1
320#define DISPLAY_TYPE_EXTERNAL_FLAT_PANEL 2
321#define DISPLAY_TYPE_INTERNAL_FLAT_PANEL 3
322
323int intel_opregion_notify_encoder(struct intel_encoder *intel_encoder,
324 bool enable)
325{
326 struct drm_device *dev = intel_encoder->base.dev;
327 u32 parm = 0;
328 u32 type = 0;
329 u32 port;
330
331 /* don't care about old stuff for now */
332 if (!HAS_DDI(dev))
333 return 0;
334
335 port = intel_ddi_get_encoder_port(intel_encoder);
336 if (port == PORT_E) {
337 port = 0;
338 } else {
339 parm |= 1 << port;
340 port++;
341 }
342
343 if (!enable)
344 parm |= 4 << 8;
345
346 switch (intel_encoder->type) {
347 case INTEL_OUTPUT_ANALOG:
348 type = DISPLAY_TYPE_CRT;
349 break;
350 case INTEL_OUTPUT_UNKNOWN:
351 case INTEL_OUTPUT_DISPLAYPORT:
352 case INTEL_OUTPUT_HDMI:
353 type = DISPLAY_TYPE_EXTERNAL_FLAT_PANEL;
354 break;
355 case INTEL_OUTPUT_EDP:
356 type = DISPLAY_TYPE_INTERNAL_FLAT_PANEL;
357 break;
358 default:
359 WARN_ONCE(1, "unsupported intel_encoder type %d\n",
360 intel_encoder->type);
361 return -EINVAL;
362 }
363
364 parm |= type << (16 + port * 3);
365
366 return swsci(dev, SWSCI_SBCB_DISPLAY_POWER_STATE, parm, NULL);
367}
368
ecbc5cf3
JN		 369static const struct {
370 pci_power_t pci_power_state;
371 u32 parm;
372} power_state_map[] = {
373 { PCI_D0, 0x00 },
374 { PCI_D1, 0x01 },
375 { PCI_D2, 0x02 },
376 { PCI_D3hot, 0x04 },
377 { PCI_D3cold, 0x04 },
378};
379
380int intel_opregion_notify_adapter(struct drm_device *dev, pci_power_t state)
381{
382 int i;
383
384 if (!HAS_DDI(dev))
385 return 0;
386
387 for (i = 0; i < ARRAY_SIZE(power_state_map); i++) {
388 if (state == power_state_map[i].pci_power_state)
389 return swsci(dev, SWSCI_SBCB_ADAPTER_POWER_STATE,
390 power_state_map[i].parm, NULL);
391 }
392
393 return -EINVAL;
394}
395
8ee1c3db
MG		 396static u32 asle_set_backlight(struct drm_device *dev, u32 bclp)
397{
398 struct drm_i915_private *dev_priv = dev->dev_private;
c91c9f32 399 struct intel_connector *intel_connector;
5bc4418b 400 struct opregion_asle __iomem *asle = dev_priv->opregion.asle;
8ee1c3db 401
749052fb
JN		 402 DRM_DEBUG_DRIVER("bclp = 0x%08x\n", bclp);
403
8ee1c3db 404 if (!(bclp & ASLE_BCLP_VALID))
507c1a45 405 return ASLC_BACKLIGHT_FAILED;
8ee1c3db
MG		 406
407 bclp &= ASLE_BCLP_MSK;
a9573556 408 if (bclp > 255)
507c1a45 409 return ASLC_BACKLIGHT_FAILED;
8ee1c3db 410
752aa88a 411 mutex_lock(&dev->mode_config.mutex);
c91c9f32 412
752aa88a 413 /*
c91c9f32
JN		 414 * Update backlight on all connectors that support backlight (usually
415 * only one).
752aa88a 416 */
540b5d02 417 DRM_DEBUG_KMS("updating opregion backlight %d/255\n", bclp);
dc5a4363
VS		 418 list_for_each_entry(intel_connector, &dev->mode_config.connector_list, base.head)
419 intel_panel_set_backlight(intel_connector, bclp, 255);
cac6a5ae 420 iowrite32(DIV_ROUND_UP(bclp * 100, 255) | ASLE_CBLV_VALID, &asle->cblv);
8ee1c3db 421
752aa88a
JB		 422 mutex_unlock(&dev->mode_config.mutex);
423
c91c9f32
JN		 424
425 return 0;
8ee1c3db
MG		 426}
427
428static u32 asle_set_als_illum(struct drm_device *dev, u32 alsi)
429{
430 /* alsi is the current ALS reading in lux. 0 indicates below sensor
431 range, 0xffff indicates above sensor range. 1-0xfffe are valid */
e93d440b 432 DRM_DEBUG_DRIVER("Illum is not supported\n");
507c1a45 433 return ASLC_ALS_ILLUM_FAILED;
8ee1c3db
MG		 434}
435
436static u32 asle_set_pwm_freq(struct drm_device *dev, u32 pfmb)
437{
e93d440b 438 DRM_DEBUG_DRIVER("PWM freq is not supported\n");
507c1a45 439 return ASLC_PWM_FREQ_FAILED;
8ee1c3db
MG		 440}
441
442static u32 asle_set_pfit(struct drm_device *dev, u32 pfit)
443{
444 /* Panel fitting is currently controlled by the X code, so this is a
445 noop until modesetting support works fully */
e93d440b 446 DRM_DEBUG_DRIVER("Pfit is not supported\n");
507c1a45
PZ		 447 return ASLC_PFIT_FAILED;
448}
449
450static u32 asle_set_supported_rotation_angles(struct drm_device *dev, u32 srot)
451{
452 DRM_DEBUG_DRIVER("SROT is not supported\n");
453 return ASLC_ROTATION_ANGLES_FAILED;
454}
455
456static u32 asle_set_button_array(struct drm_device *dev, u32 iuer)
457{
458 if (!iuer)
459 DRM_DEBUG_DRIVER("Button array event is not supported (nothing)\n");
460 if (iuer & ASLE_IUER_ROTATION_LOCK_BTN)
461 DRM_DEBUG_DRIVER("Button array event is not supported (rotation lock)\n");
462 if (iuer & ASLE_IUER_VOLUME_DOWN_BTN)
463 DRM_DEBUG_DRIVER("Button array event is not supported (volume down)\n");
464 if (iuer & ASLE_IUER_VOLUME_UP_BTN)
465 DRM_DEBUG_DRIVER("Button array event is not supported (volume up)\n");
466 if (iuer & ASLE_IUER_WINDOWS_BTN)
467 DRM_DEBUG_DRIVER("Button array event is not supported (windows)\n");
468 if (iuer & ASLE_IUER_POWER_BTN)
469 DRM_DEBUG_DRIVER("Button array event is not supported (power)\n");
470
471 return ASLC_BUTTON_ARRAY_FAILED;
472}
473
474static u32 asle_set_convertible(struct drm_device *dev, u32 iuer)
475{
476 if (iuer & ASLE_IUER_CONVERTIBLE)
477 DRM_DEBUG_DRIVER("Convertible is not supported (clamshell)\n");
478 else
479 DRM_DEBUG_DRIVER("Convertible is not supported (slate)\n");
480
481 return ASLC_CONVERTIBLE_FAILED;
482}
483
484static u32 asle_set_docking(struct drm_device *dev, u32 iuer)
485{
486 if (iuer & ASLE_IUER_DOCKING)
487 DRM_DEBUG_DRIVER("Docking is not supported (docked)\n");
488 else
489 DRM_DEBUG_DRIVER("Docking is not supported (undocked)\n");
490
491 return ASLC_DOCKING_FAILED;
492}
493
494static u32 asle_isct_state(struct drm_device *dev)
495{
496 DRM_DEBUG_DRIVER("ISCT is not supported\n");
497 return ASLC_ISCT_STATE_FAILED;
8ee1c3db
MG		 498}
499
91a60f20 500static void asle_work(struct work_struct *work)
8ee1c3db 501{
91a60f20
JN		 502 struct intel_opregion *opregion =
503 container_of(work, struct intel_opregion, asle_work);
504 struct drm_i915_private *dev_priv =
505 container_of(opregion, struct drm_i915_private, opregion);
506 struct drm_device *dev = dev_priv->dev;
5bc4418b 507 struct opregion_asle __iomem *asle = dev_priv->opregion.asle;
507c1a45
PZ		 508 u32 aslc_stat = 0;
509 u32 aslc_req;
8ee1c3db
MG		 510
511 if (!asle)
512 return;
513
507c1a45 514 aslc_req = ioread32(&asle->aslc);
8ee1c3db 515
507c1a45
PZ		 516 if (!(aslc_req & ASLC_REQ_MSK)) {
517 DRM_DEBUG_DRIVER("No request on ASLC interrupt 0x%08x\n",
518 aslc_req);
8ee1c3db
MG		 519 return;
520 }
521
507c1a45
PZ		 522 if (aslc_req & ASLC_SET_ALS_ILLUM)
523 aslc_stat |= asle_set_als_illum(dev, ioread32(&asle->alsi));
524
525 if (aslc_req & ASLC_SET_BACKLIGHT)
526 aslc_stat |= asle_set_backlight(dev, ioread32(&asle->bclp));
527
528 if (aslc_req & ASLC_SET_PFIT)
529 aslc_stat |= asle_set_pfit(dev, ioread32(&asle->pfit));
530
531 if (aslc_req & ASLC_SET_PWM_FREQ)
532 aslc_stat |= asle_set_pwm_freq(dev, ioread32(&asle->pfmb));
533
534 if (aslc_req & ASLC_SUPPORTED_ROTATION_ANGLES)
535 aslc_stat |= asle_set_supported_rotation_angles(dev,
536 ioread32(&asle->srot));
537
538 if (aslc_req & ASLC_BUTTON_ARRAY)
539 aslc_stat |= asle_set_button_array(dev, ioread32(&asle->iuer));
8ee1c3db 540
507c1a45
PZ		 541 if (aslc_req & ASLC_CONVERTIBLE_INDICATOR)
542 aslc_stat |= asle_set_convertible(dev, ioread32(&asle->iuer));
8ee1c3db 543
507c1a45
PZ		 544 if (aslc_req & ASLC_DOCKING_INDICATOR)
545 aslc_stat |= asle_set_docking(dev, ioread32(&asle->iuer));
8ee1c3db 546
507c1a45
PZ		 547 if (aslc_req & ASLC_ISCT_STATE_CHANGE)
548 aslc_stat |= asle_isct_state(dev);
8ee1c3db 549
507c1a45 550 iowrite32(aslc_stat, &asle->aslc);
8ee1c3db
MG		 551}
552
91a60f20
JN		 553void intel_opregion_asle_intr(struct drm_device *dev)
554{
555 struct drm_i915_private *dev_priv = dev->dev_private;
556
557 if (dev_priv->opregion.asle)
558 schedule_work(&dev_priv->opregion.asle_work);
559}
560
8ee1c3db
MG		 561#define ACPI_EV_DISPLAY_SWITCH (1<<0)
562#define ACPI_EV_LID (1<<1)
563#define ACPI_EV_DOCK (1<<2)
564
565static struct intel_opregion *system_opregion;
566
b358d0a6
HE		 567static int intel_opregion_video_event(struct notifier_block *nb,
568 unsigned long val, void *data)
8ee1c3db
MG		 569{
570 /* The only video events relevant to opregion are 0x80. These indicate
571 either a docking event, lid switch or display switch request. In
572 Linux, these are handled by the dock, button and video drivers.
f5a3d0c4 573 */
8ee1c3db 574
5bc4418b 575 struct opregion_acpi __iomem *acpi;
f5a3d0c4
MG		 576 struct acpi_bus_event *event = data;
577 int ret = NOTIFY_OK;
578
579 if (strcmp(event->device_class, ACPI_VIDEO_CLASS) != 0)
580 return NOTIFY_DONE;
8ee1c3db
MG		 581
582 if (!system_opregion)
583 return NOTIFY_DONE;
584
585 acpi = system_opregion->acpi;
f5a3d0c4 586
5bc4418b
BW		 587 if (event->type == 0x80 &&
588 (ioread32(&acpi->cevt) & 1) == 0)
f5a3d0c4
MG		 589 ret = NOTIFY_BAD;
590
5bc4418b 591 iowrite32(0, &acpi->csts);
8ee1c3db 592
f5a3d0c4 593 return ret;
8ee1c3db
MG		 594}
595
596static struct notifier_block intel_opregion_notifier = {
597 .notifier_call = intel_opregion_video_event,
598};
599
74a365b3
MG		 600/*
601 * Initialise the DIDL field in opregion. This passes a list of devices to
602 * the firmware. Values are defined by section B.4.2 of the ACPI specification
603 * (version 3)
604 */
605
606static void intel_didl_outputs(struct drm_device *dev)
607{
608 struct drm_i915_private *dev_priv = dev->dev_private;
609 struct intel_opregion *opregion = &dev_priv->opregion;
610 struct drm_connector *connector;
3143751f
ZR		 611 acpi_handle handle;
612 struct acpi_device *acpi_dev, *acpi_cdev, *acpi_video_bus = NULL;
613 unsigned long long device_id;
614 acpi_status status;
5bc4418b 615 u32 temp;
74a365b3
MG		 616 int i = 0;
617
3a83f992 618 handle = ACPI_HANDLE(&dev->pdev->dev);
7d37beaa 619 if (!handle || acpi_bus_get_device(handle, &acpi_dev))
3143751f
ZR		 620 return;
621
d4e1a692 622 if (acpi_is_video_device(handle))
3143751f
ZR		 623 acpi_video_bus = acpi_dev;
624 else {
625 list_for_each_entry(acpi_cdev, &acpi_dev->children, node) {
d4e1a692 626 if (acpi_is_video_device(acpi_cdev->handle)) {
3143751f
ZR		 627 acpi_video_bus = acpi_cdev;
628 break;
629 }
630 }
631 }
632
633 if (!acpi_video_bus) {
a70491cc 634 pr_warn("No ACPI video bus found\n");
3143751f
ZR		 635 return;
636 }
637
638 list_for_each_entry(acpi_cdev, &acpi_video_bus->children, node) {
639 if (i >= 8) {
0f4f7b57
DV		 640 dev_dbg(&dev->pdev->dev,
641 "More than 8 outputs detected via ACPI\n");
3143751f
ZR		 642 return;
643 }
644 status =
645 acpi_evaluate_integer(acpi_cdev->handle, "_ADR",
646 NULL, &device_id);
647 if (ACPI_SUCCESS(status)) {
648 if (!device_id)
649 goto blind_set;
5bc4418b
BW		 650 iowrite32((u32)(device_id & 0x0f0f),
651 &opregion->acpi->didl[i]);
3143751f
ZR		 652 i++;
653 }
654 }
655
656end:
657 /* If fewer than 8 outputs, the list must be null terminated */
658 if (i < 8)
5bc4418b 659 iowrite32(0, &opregion->acpi->didl[i]);
3143751f
ZR		 660 return;
661
662blind_set:
663 i = 0;
74a365b3
MG		 664 list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
665 int output_type = ACPI_OTHER_OUTPUT;
666 if (i >= 8) {
0f4f7b57
DV		 667 dev_dbg(&dev->pdev->dev,
668 "More than 8 outputs in connector list\n");
74a365b3
MG		 669 return;
670 }
671 switch (connector->connector_type) {
672 case DRM_MODE_CONNECTOR_VGA:
673 case DRM_MODE_CONNECTOR_DVIA:
674 output_type = ACPI_VGA_OUTPUT;
675 break;
676 case DRM_MODE_CONNECTOR_Composite:
677 case DRM_MODE_CONNECTOR_SVIDEO:
678 case DRM_MODE_CONNECTOR_Component:
679 case DRM_MODE_CONNECTOR_9PinDIN:
680 output_type = ACPI_TV_OUTPUT;
681 break;
682 case DRM_MODE_CONNECTOR_DVII:
683 case DRM_MODE_CONNECTOR_DVID:
684 case DRM_MODE_CONNECTOR_DisplayPort:
685 case DRM_MODE_CONNECTOR_HDMIA:
686 case DRM_MODE_CONNECTOR_HDMIB:
687 output_type = ACPI_DIGITAL_OUTPUT;
688 break;
689 case DRM_MODE_CONNECTOR_LVDS:
690 output_type = ACPI_LVDS_OUTPUT;
691 break;
692 }
5bc4418b
BW		 693 temp = ioread32(&opregion->acpi->didl[i]);
694 iowrite32(temp | (1<<31) | output_type | i,
695 &opregion->acpi->didl[i]);
74a365b3
MG		 696 i++;
697 }
3143751f 698 goto end;
74a365b3
MG		 699}
700
d627b62f
L		 701static void intel_setup_cadls(struct drm_device *dev)
702{
703 struct drm_i915_private *dev_priv = dev->dev_private;
704 struct intel_opregion *opregion = &dev_priv->opregion;
705 int i = 0;
706 u32 disp_id;
707
708 /* Initialize the CADL field by duplicating the DIDL values.
709 * Technically, this is not always correct as display outputs may exist,
710 * but not active. This initialization is necessary for some Clevo
711 * laptops that check this field before processing the brightness and
712 * display switching hotkeys. Just like DIDL, CADL is NULL-terminated if
713 * there are less than eight devices. */
714 do {
715 disp_id = ioread32(&opregion->acpi->didl[i]);
716 iowrite32(disp_id, &opregion->acpi->cadl[i]);
717 } while (++i < 8 && disp_id != 0);
718}
719
44834a67
CW		 720void intel_opregion_init(struct drm_device *dev)
721{
722 struct drm_i915_private *dev_priv = dev->dev_private;
723 struct intel_opregion *opregion = &dev_priv->opregion;
724
725 if (!opregion->header)
726 return;
727
728 if (opregion->acpi) {
d627b62f 729 if (drm_core_check_feature(dev, DRIVER_MODESET)) {
44834a67 730 intel_didl_outputs(dev);
d627b62f
L		 731 intel_setup_cadls(dev);
732 }
44834a67
CW		 733
734 /* Notify BIOS we are ready to handle ACPI video ext notifs.
735 * Right now, all the events are handled by the ACPI video module.
736 * We don't actually need to do anything with them. */
5bc4418b
BW		 737 iowrite32(0, &opregion->acpi->csts);
738 iowrite32(1, &opregion->acpi->drdy);
44834a67
CW		 739
740 system_opregion = opregion;
741 register_acpi_notifier(&intel_opregion_notifier);
742 }
743
68bca4b0 744 if (opregion->asle) {
68bca4b0
JN		 745 iowrite32(ASLE_TCHE_BLC_EN, &opregion->asle->tche);
746 iowrite32(ASLE_ARDY_READY, &opregion->asle->ardy);
747 }
44834a67
CW		 748}
749
750void intel_opregion_fini(struct drm_device *dev)
751{
752 struct drm_i915_private *dev_priv = dev->dev_private;
753 struct intel_opregion *opregion = &dev_priv->opregion;
754
755 if (!opregion->header)
756 return;
757
68bca4b0
JN		 758 if (opregion->asle)
759 iowrite32(ASLE_ARDY_NOT_READY, &opregion->asle->ardy);
760
91a60f20
JN		 761 cancel_work_sync(&dev_priv->opregion.asle_work);
762
44834a67 763 if (opregion->acpi) {
5bc4418b 764 iowrite32(0, &opregion->acpi->drdy);
44834a67
CW		 765
766 system_opregion = NULL;
767 unregister_acpi_notifier(&intel_opregion_notifier);
768 }
769
770 /* just clear all opregion memory pointers now */
771 iounmap(opregion->header);
772 opregion->header = NULL;
773 opregion->acpi = NULL;
774 opregion->swsci = NULL;
775 opregion->asle = NULL;
776 opregion->vbt = NULL;
794a79a6 777 opregion->lid_state = NULL;
44834a67 778}
ebde53c7
JN		 779
780static void swsci_setup(struct drm_device *dev)
781{
782 struct drm_i915_private *dev_priv = dev->dev_private;
783 struct intel_opregion *opregion = &dev_priv->opregion;
784 bool requested_callbacks = false;
785 u32 tmp;
786
787 /* Sub-function code 0 is okay, let's allow them. */
788 opregion->swsci_gbda_sub_functions = 1;
789 opregion->swsci_sbcb_sub_functions = 1;
790
791 /* We use GBDA to ask for supported GBDA calls. */
792 if (swsci(dev, SWSCI_GBDA_SUPPORTED_CALLS, 0, &tmp) == 0) {
793 /* make the bits match the sub-function codes */
794 tmp <<= 1;
795 opregion->swsci_gbda_sub_functions |= tmp;
796 }
797
798 /*
799 * We also use GBDA to ask for _requested_ SBCB callbacks. The driver
800 * must not call interfaces that are not specifically requested by the
801 * bios.
802 */
803 if (swsci(dev, SWSCI_GBDA_REQUESTED_CALLBACKS, 0, &tmp) == 0) {
804 /* here, the bits already match sub-function codes */
805 opregion->swsci_sbcb_sub_functions |= tmp;
806 requested_callbacks = true;
807 }
808
809 /*
810 * But we use SBCB to ask for _supported_ SBCB calls. This does not mean
811 * the callback is _requested_. But we still can't call interfaces that
812 * are not requested.
813 */
814 if (swsci(dev, SWSCI_SBCB_SUPPORTED_CALLBACKS, 0, &tmp) == 0) {
815 /* make the bits match the sub-function codes */
816 u32 low = tmp & 0x7ff;
817 u32 high = tmp & ~0xfff; /* bit 11 is reserved */
818 tmp = (high << 4) | (low << 1) | 1;
819
820 /* best guess what to do with supported wrt requested */
821 if (requested_callbacks) {
822 u32 req = opregion->swsci_sbcb_sub_functions;
823 if ((req & tmp) != req)
824 DRM_DEBUG_DRIVER("SWSCI BIOS requested (%08x) SBCB callbacks that are not supported (%08x)\n", req, tmp);
825 /* XXX: for now, trust the requested callbacks */
826 /* opregion->swsci_sbcb_sub_functions &= tmp; */
827 } else {
828 opregion->swsci_sbcb_sub_functions |= tmp;
829 }
830 }
831
832 DRM_DEBUG_DRIVER("SWSCI GBDA callbacks %08x, SBCB callbacks %08x\n",
833 opregion->swsci_gbda_sub_functions,
834 opregion->swsci_sbcb_sub_functions);
835}
836#else /* CONFIG_ACPI */
837static inline void swsci_setup(struct drm_device *dev) {}
838#endif /* CONFIG_ACPI */
44834a67
CW		 839
840int intel_opregion_setup(struct drm_device *dev)
8ee1c3db
MG		 841{
842 struct drm_i915_private *dev_priv = dev->dev_private;
843 struct intel_opregion *opregion = &dev_priv->opregion;
5bc4418b 844 void __iomem *base;
8ee1c3db 845 u32 asls, mboxes;
5bc4418b 846 char buf[sizeof(OPREGION_SIGNATURE)];
8ee1c3db
MG		 847 int err = 0;
848
849 pci_read_config_dword(dev->pdev, PCI_ASLS, &asls);
44d98a61 850 DRM_DEBUG_DRIVER("graphic opregion physical addr: 0x%x\n", asls);
8ee1c3db 851 if (asls == 0) {
44d98a61 852 DRM_DEBUG_DRIVER("ACPI OpRegion not supported!\n");
8ee1c3db
MG		 853 return -ENOTSUPP;
854 }
855
1dca220b 856#ifdef CONFIG_ACPI
91a60f20 857 INIT_WORK(&opregion->asle_work, asle_work);
1dca220b 858#endif
91a60f20 859
b705120e 860 base = acpi_os_ioremap(asls, OPREGION_SIZE);
8ee1c3db
MG		 861 if (!base)
862 return -ENOMEM;
863
5bc4418b
BW		 864 memcpy_fromio(buf, base, sizeof(buf));
865
866 if (memcmp(buf, OPREGION_SIGNATURE, 16)) {
44d98a61 867 DRM_DEBUG_DRIVER("opregion signature mismatch\n");
8ee1c3db
MG		 868 err = -EINVAL;
869 goto err_out;
870 }
44834a67
CW		 871 opregion->header = base;
872 opregion->vbt = base + OPREGION_VBT_OFFSET;
8ee1c3db 873
82d3c90c 874 opregion->lid_state = base + ACPI_CLID;
01fe9dbd 875
5bc4418b 876 mboxes = ioread32(&opregion->header->mboxes);
8ee1c3db 877 if (mboxes & MBOX_ACPI) {
44d98a61 878 DRM_DEBUG_DRIVER("Public ACPI methods supported\n");
8ee1c3db 879 opregion->acpi = base + OPREGION_ACPI_OFFSET;
8ee1c3db 880 }
8ee1c3db
MG		 881
882 if (mboxes & MBOX_SWSCI) {
44d98a61 883 DRM_DEBUG_DRIVER("SWSCI supported\n");
8ee1c3db 884 opregion->swsci = base + OPREGION_SWSCI_OFFSET;
ebde53c7 885 swsci_setup(dev);
8ee1c3db
MG		 886 }
887 if (mboxes & MBOX_ASLE) {
44d98a61 888 DRM_DEBUG_DRIVER("ASLE supported\n");
8ee1c3db 889 opregion->asle = base + OPREGION_ASLE_OFFSET;
68bca4b0
JN		 890
891 iowrite32(ASLE_ARDY_NOT_READY, &opregion->asle->ardy);
8ee1c3db
MG		 892 }
893
8ee1c3db
MG		 894 return 0;
895
896err_out:
30c56660 897 iounmap(base);
8ee1c3db
MG		 898 return err;
899}
Linux 6.x block layer and io_uring tree(s)