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drm/i915: Avoid tweaking RPS before it is enabled
[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];
8ee1c3db
MG		 67} __attribute__((packed));
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];
8ee1c3db
MG		 89} __attribute__((packed));
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];
8ee1c3db
MG		 97} __attribute__((packed));
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];
8ee1c3db
MG		 118} __attribute__((packed));
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) {
261 dslp = 2;
262 } else if (dslp > 500) {
263 /* Hey bios, trust must be earned. */
264 WARN_ONCE(1, "excessive driver sleep timeout (DSPL) %u\n", dslp);
265 dslp = 500;
266 }
267
268 /* The spec tells us to do this, but we are the only user... */
269 scic = ioread32(&swsci->scic);
270 if (scic & SWSCI_SCIC_INDICATOR) {
271 DRM_DEBUG_DRIVER("SWSCI request already in progress\n");
272 return -EBUSY;
273 }
274
275 scic = function | SWSCI_SCIC_INDICATOR;
276
277 iowrite32(parm, &swsci->parm);
278 iowrite32(scic, &swsci->scic);
279
280 /* Ensure SCI event is selected and event trigger is cleared. */
281 pci_read_config_word(dev->pdev, PCI_SWSCI, &pci_swsci);
282 if (!(pci_swsci & PCI_SWSCI_SCISEL) || (pci_swsci & PCI_SWSCI_GSSCIE)) {
283 pci_swsci |= PCI_SWSCI_SCISEL;
284 pci_swsci &= ~PCI_SWSCI_GSSCIE;
285 pci_write_config_word(dev->pdev, PCI_SWSCI, pci_swsci);
286 }
287
288 /* Use event trigger to tell bios to check the mail. */
289 pci_swsci |= PCI_SWSCI_GSSCIE;
290 pci_write_config_word(dev->pdev, PCI_SWSCI, pci_swsci);
291
292 /* Poll for the result. */
293#define C (((scic = ioread32(&swsci->scic)) & SWSCI_SCIC_INDICATOR) == 0)
294 if (wait_for(C, dslp)) {
295 DRM_DEBUG_DRIVER("SWSCI request timed out\n");
296 return -ETIMEDOUT;
297 }
298
299 scic = (scic & SWSCI_SCIC_EXIT_STATUS_MASK) >>
300 SWSCI_SCIC_EXIT_STATUS_SHIFT;
301
302 /* Note: scic == 0 is an error! */
303 if (scic != SWSCI_SCIC_EXIT_STATUS_SUCCESS) {
304 DRM_DEBUG_DRIVER("SWSCI request error %u\n", scic);
305 return -EIO;
306 }
307
308 if (parm_out)
309 *parm_out = ioread32(&swsci->parm);
310
311 return 0;
312
313#undef C
314}
315
9c4b0a68
JN		 316#define DISPLAY_TYPE_CRT 0
317#define DISPLAY_TYPE_TV 1
318#define DISPLAY_TYPE_EXTERNAL_FLAT_PANEL 2
319#define DISPLAY_TYPE_INTERNAL_FLAT_PANEL 3
320
321int intel_opregion_notify_encoder(struct intel_encoder *intel_encoder,
322 bool enable)
323{
324 struct drm_device *dev = intel_encoder->base.dev;
325 u32 parm = 0;
326 u32 type = 0;
327 u32 port;
328
329 /* don't care about old stuff for now */
330 if (!HAS_DDI(dev))
331 return 0;
332
333 port = intel_ddi_get_encoder_port(intel_encoder);
334 if (port == PORT_E) {
335 port = 0;
336 } else {
337 parm |= 1 << port;
338 port++;
339 }
340
341 if (!enable)
342 parm |= 4 << 8;
343
344 switch (intel_encoder->type) {
345 case INTEL_OUTPUT_ANALOG:
346 type = DISPLAY_TYPE_CRT;
347 break;
348 case INTEL_OUTPUT_UNKNOWN:
349 case INTEL_OUTPUT_DISPLAYPORT:
350 case INTEL_OUTPUT_HDMI:
351 type = DISPLAY_TYPE_EXTERNAL_FLAT_PANEL;
352 break;
353 case INTEL_OUTPUT_EDP:
354 type = DISPLAY_TYPE_INTERNAL_FLAT_PANEL;
355 break;
356 default:
357 WARN_ONCE(1, "unsupported intel_encoder type %d\n",
358 intel_encoder->type);
359 return -EINVAL;
360 }
361
362 parm |= type << (16 + port * 3);
363
364 return swsci(dev, SWSCI_SBCB_DISPLAY_POWER_STATE, parm, NULL);
365}
366
ecbc5cf3
JN		 367static const struct {
368 pci_power_t pci_power_state;
369 u32 parm;
370} power_state_map[] = {
371 { PCI_D0, 0x00 },
372 { PCI_D1, 0x01 },
373 { PCI_D2, 0x02 },
374 { PCI_D3hot, 0x04 },
375 { PCI_D3cold, 0x04 },
376};
377
378int intel_opregion_notify_adapter(struct drm_device *dev, pci_power_t state)
379{
380 int i;
381
382 if (!HAS_DDI(dev))
383 return 0;
384
385 for (i = 0; i < ARRAY_SIZE(power_state_map); i++) {
386 if (state == power_state_map[i].pci_power_state)
387 return swsci(dev, SWSCI_SBCB_ADAPTER_POWER_STATE,
388 power_state_map[i].parm, NULL);
389 }
390
391 return -EINVAL;
392}
393
8ee1c3db
MG		 394static u32 asle_set_backlight(struct drm_device *dev, u32 bclp)
395{
396 struct drm_i915_private *dev_priv = dev->dev_private;
5bc4418b 397 struct opregion_asle __iomem *asle = dev_priv->opregion.asle;
8ee1c3db 398
749052fb
JN		 399 DRM_DEBUG_DRIVER("bclp = 0x%08x\n", bclp);
400
8ee1c3db 401 if (!(bclp & ASLE_BCLP_VALID))
507c1a45 402 return ASLC_BACKLIGHT_FAILED;
8ee1c3db
MG		 403
404 bclp &= ASLE_BCLP_MSK;
a9573556 405 if (bclp > 255)
507c1a45 406 return ASLC_BACKLIGHT_FAILED;
8ee1c3db 407
d6540632 408 intel_panel_set_backlight(dev, bclp, 255);
cac6a5ae 409 iowrite32(DIV_ROUND_UP(bclp * 100, 255) | ASLE_CBLV_VALID, &asle->cblv);
8ee1c3db
MG		 410
411 return 0;
412}
413
414static u32 asle_set_als_illum(struct drm_device *dev, u32 alsi)
415{
416 /* alsi is the current ALS reading in lux. 0 indicates below sensor
417 range, 0xffff indicates above sensor range. 1-0xfffe are valid */
e93d440b 418 DRM_DEBUG_DRIVER("Illum is not supported\n");
507c1a45 419 return ASLC_ALS_ILLUM_FAILED;
8ee1c3db
MG		 420}
421
422static u32 asle_set_pwm_freq(struct drm_device *dev, u32 pfmb)
423{
e93d440b 424 DRM_DEBUG_DRIVER("PWM freq is not supported\n");
507c1a45 425 return ASLC_PWM_FREQ_FAILED;
8ee1c3db
MG		 426}
427
428static u32 asle_set_pfit(struct drm_device *dev, u32 pfit)
429{
430 /* Panel fitting is currently controlled by the X code, so this is a
431 noop until modesetting support works fully */
e93d440b 432 DRM_DEBUG_DRIVER("Pfit is not supported\n");
507c1a45
PZ		 433 return ASLC_PFIT_FAILED;
434}
435
436static u32 asle_set_supported_rotation_angles(struct drm_device *dev, u32 srot)
437{
438 DRM_DEBUG_DRIVER("SROT is not supported\n");
439 return ASLC_ROTATION_ANGLES_FAILED;
440}
441
442static u32 asle_set_button_array(struct drm_device *dev, u32 iuer)
443{
444 if (!iuer)
445 DRM_DEBUG_DRIVER("Button array event is not supported (nothing)\n");
446 if (iuer & ASLE_IUER_ROTATION_LOCK_BTN)
447 DRM_DEBUG_DRIVER("Button array event is not supported (rotation lock)\n");
448 if (iuer & ASLE_IUER_VOLUME_DOWN_BTN)
449 DRM_DEBUG_DRIVER("Button array event is not supported (volume down)\n");
450 if (iuer & ASLE_IUER_VOLUME_UP_BTN)
451 DRM_DEBUG_DRIVER("Button array event is not supported (volume up)\n");
452 if (iuer & ASLE_IUER_WINDOWS_BTN)
453 DRM_DEBUG_DRIVER("Button array event is not supported (windows)\n");
454 if (iuer & ASLE_IUER_POWER_BTN)
455 DRM_DEBUG_DRIVER("Button array event is not supported (power)\n");
456
457 return ASLC_BUTTON_ARRAY_FAILED;
458}
459
460static u32 asle_set_convertible(struct drm_device *dev, u32 iuer)
461{
462 if (iuer & ASLE_IUER_CONVERTIBLE)
463 DRM_DEBUG_DRIVER("Convertible is not supported (clamshell)\n");
464 else
465 DRM_DEBUG_DRIVER("Convertible is not supported (slate)\n");
466
467 return ASLC_CONVERTIBLE_FAILED;
468}
469
470static u32 asle_set_docking(struct drm_device *dev, u32 iuer)
471{
472 if (iuer & ASLE_IUER_DOCKING)
473 DRM_DEBUG_DRIVER("Docking is not supported (docked)\n");
474 else
475 DRM_DEBUG_DRIVER("Docking is not supported (undocked)\n");
476
477 return ASLC_DOCKING_FAILED;
478}
479
480static u32 asle_isct_state(struct drm_device *dev)
481{
482 DRM_DEBUG_DRIVER("ISCT is not supported\n");
483 return ASLC_ISCT_STATE_FAILED;
8ee1c3db
MG		 484}
485
3b617967 486void intel_opregion_asle_intr(struct drm_device *dev)
8ee1c3db
MG		 487{
488 struct drm_i915_private *dev_priv = dev->dev_private;
5bc4418b 489 struct opregion_asle __iomem *asle = dev_priv->opregion.asle;
507c1a45
PZ		 490 u32 aslc_stat = 0;
491 u32 aslc_req;
8ee1c3db
MG		 492
493 if (!asle)
494 return;
495
507c1a45 496 aslc_req = ioread32(&asle->aslc);
8ee1c3db 497
507c1a45
PZ		 498 if (!(aslc_req & ASLC_REQ_MSK)) {
499 DRM_DEBUG_DRIVER("No request on ASLC interrupt 0x%08x\n",
500 aslc_req);
8ee1c3db
MG		 501 return;
502 }
503
507c1a45
PZ		 504 if (aslc_req & ASLC_SET_ALS_ILLUM)
505 aslc_stat |= asle_set_als_illum(dev, ioread32(&asle->alsi));
506
507 if (aslc_req & ASLC_SET_BACKLIGHT)
508 aslc_stat |= asle_set_backlight(dev, ioread32(&asle->bclp));
509
510 if (aslc_req & ASLC_SET_PFIT)
511 aslc_stat |= asle_set_pfit(dev, ioread32(&asle->pfit));
512
513 if (aslc_req & ASLC_SET_PWM_FREQ)
514 aslc_stat |= asle_set_pwm_freq(dev, ioread32(&asle->pfmb));
515
516 if (aslc_req & ASLC_SUPPORTED_ROTATION_ANGLES)
517 aslc_stat |= asle_set_supported_rotation_angles(dev,
518 ioread32(&asle->srot));
519
520 if (aslc_req & ASLC_BUTTON_ARRAY)
521 aslc_stat |= asle_set_button_array(dev, ioread32(&asle->iuer));
8ee1c3db 522
507c1a45
PZ		 523 if (aslc_req & ASLC_CONVERTIBLE_INDICATOR)
524 aslc_stat |= asle_set_convertible(dev, ioread32(&asle->iuer));
8ee1c3db 525
507c1a45
PZ		 526 if (aslc_req & ASLC_DOCKING_INDICATOR)
527 aslc_stat |= asle_set_docking(dev, ioread32(&asle->iuer));
8ee1c3db 528
507c1a45
PZ		 529 if (aslc_req & ASLC_ISCT_STATE_CHANGE)
530 aslc_stat |= asle_isct_state(dev);
8ee1c3db 531
507c1a45 532 iowrite32(aslc_stat, &asle->aslc);
8ee1c3db
MG		 533}
534
8ee1c3db
MG		 535#define ACPI_EV_DISPLAY_SWITCH (1<<0)
536#define ACPI_EV_LID (1<<1)
537#define ACPI_EV_DOCK (1<<2)
538
539static struct intel_opregion *system_opregion;
540
b358d0a6
HE		 541static int intel_opregion_video_event(struct notifier_block *nb,
542 unsigned long val, void *data)
8ee1c3db
MG		 543{
544 /* The only video events relevant to opregion are 0x80. These indicate
545 either a docking event, lid switch or display switch request. In
546 Linux, these are handled by the dock, button and video drivers.
f5a3d0c4 547 */
8ee1c3db 548
5bc4418b 549 struct opregion_acpi __iomem *acpi;
f5a3d0c4
MG		 550 struct acpi_bus_event *event = data;
551 int ret = NOTIFY_OK;
552
553 if (strcmp(event->device_class, ACPI_VIDEO_CLASS) != 0)
554 return NOTIFY_DONE;
8ee1c3db
MG		 555
556 if (!system_opregion)
557 return NOTIFY_DONE;
558
559 acpi = system_opregion->acpi;
f5a3d0c4 560
5bc4418b
BW		 561 if (event->type == 0x80 &&
562 (ioread32(&acpi->cevt) & 1) == 0)
f5a3d0c4
MG		 563 ret = NOTIFY_BAD;
564
5bc4418b 565 iowrite32(0, &acpi->csts);
8ee1c3db 566
f5a3d0c4 567 return ret;
8ee1c3db
MG		 568}
569
570static struct notifier_block intel_opregion_notifier = {
571 .notifier_call = intel_opregion_video_event,
572};
573
74a365b3
MG		 574/*
575 * Initialise the DIDL field in opregion. This passes a list of devices to
576 * the firmware. Values are defined by section B.4.2 of the ACPI specification
577 * (version 3)
578 */
579
580static void intel_didl_outputs(struct drm_device *dev)
581{
582 struct drm_i915_private *dev_priv = dev->dev_private;
583 struct intel_opregion *opregion = &dev_priv->opregion;
584 struct drm_connector *connector;
3143751f
ZR		 585 acpi_handle handle;
586 struct acpi_device *acpi_dev, *acpi_cdev, *acpi_video_bus = NULL;
587 unsigned long long device_id;
588 acpi_status status;
5bc4418b 589 u32 temp;
74a365b3
MG		 590 int i = 0;
591
3143751f 592 handle = DEVICE_ACPI_HANDLE(&dev->pdev->dev);
7d37beaa 593 if (!handle || acpi_bus_get_device(handle, &acpi_dev))
3143751f
ZR		 594 return;
595
d4e1a692 596 if (acpi_is_video_device(handle))
3143751f
ZR		 597 acpi_video_bus = acpi_dev;
598 else {
599 list_for_each_entry(acpi_cdev, &acpi_dev->children, node) {
d4e1a692 600 if (acpi_is_video_device(acpi_cdev->handle)) {
3143751f
ZR		 601 acpi_video_bus = acpi_cdev;
602 break;
603 }
604 }
605 }
606
607 if (!acpi_video_bus) {
a70491cc 608 pr_warn("No ACPI video bus found\n");
3143751f
ZR		 609 return;
610 }
611
612 list_for_each_entry(acpi_cdev, &acpi_video_bus->children, node) {
613 if (i >= 8) {
0f4f7b57
DV		 614 dev_dbg(&dev->pdev->dev,
615 "More than 8 outputs detected via ACPI\n");
3143751f
ZR		 616 return;
617 }
618 status =
619 acpi_evaluate_integer(acpi_cdev->handle, "_ADR",
620 NULL, &device_id);
621 if (ACPI_SUCCESS(status)) {
622 if (!device_id)
623 goto blind_set;
5bc4418b
BW		 624 iowrite32((u32)(device_id & 0x0f0f),
625 &opregion->acpi->didl[i]);
3143751f
ZR		 626 i++;
627 }
628 }
629
630end:
631 /* If fewer than 8 outputs, the list must be null terminated */
632 if (i < 8)
5bc4418b 633 iowrite32(0, &opregion->acpi->didl[i]);
3143751f
ZR		 634 return;
635
636blind_set:
637 i = 0;
74a365b3
MG		 638 list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
639 int output_type = ACPI_OTHER_OUTPUT;
640 if (i >= 8) {
0f4f7b57
DV		 641 dev_dbg(&dev->pdev->dev,
642 "More than 8 outputs in connector list\n");
74a365b3
MG		 643 return;
644 }
645 switch (connector->connector_type) {
646 case DRM_MODE_CONNECTOR_VGA:
647 case DRM_MODE_CONNECTOR_DVIA:
648 output_type = ACPI_VGA_OUTPUT;
649 break;
650 case DRM_MODE_CONNECTOR_Composite:
651 case DRM_MODE_CONNECTOR_SVIDEO:
652 case DRM_MODE_CONNECTOR_Component:
653 case DRM_MODE_CONNECTOR_9PinDIN:
654 output_type = ACPI_TV_OUTPUT;
655 break;
656 case DRM_MODE_CONNECTOR_DVII:
657 case DRM_MODE_CONNECTOR_DVID:
658 case DRM_MODE_CONNECTOR_DisplayPort:
659 case DRM_MODE_CONNECTOR_HDMIA:
660 case DRM_MODE_CONNECTOR_HDMIB:
661 output_type = ACPI_DIGITAL_OUTPUT;
662 break;
663 case DRM_MODE_CONNECTOR_LVDS:
664 output_type = ACPI_LVDS_OUTPUT;
665 break;
666 }
5bc4418b
BW		 667 temp = ioread32(&opregion->acpi->didl[i]);
668 iowrite32(temp | (1<<31) | output_type | i,
669 &opregion->acpi->didl[i]);
74a365b3
MG		 670 i++;
671 }
3143751f 672 goto end;
74a365b3
MG		 673}
674
d627b62f
L		 675static void intel_setup_cadls(struct drm_device *dev)
676{
677 struct drm_i915_private *dev_priv = dev->dev_private;
678 struct intel_opregion *opregion = &dev_priv->opregion;
679 int i = 0;
680 u32 disp_id;
681
682 /* Initialize the CADL field by duplicating the DIDL values.
683 * Technically, this is not always correct as display outputs may exist,
684 * but not active. This initialization is necessary for some Clevo
685 * laptops that check this field before processing the brightness and
686 * display switching hotkeys. Just like DIDL, CADL is NULL-terminated if
687 * there are less than eight devices. */
688 do {
689 disp_id = ioread32(&opregion->acpi->didl[i]);
690 iowrite32(disp_id, &opregion->acpi->cadl[i]);
691 } while (++i < 8 && disp_id != 0);
692}
693
44834a67
CW		 694void intel_opregion_init(struct drm_device *dev)
695{
696 struct drm_i915_private *dev_priv = dev->dev_private;
697 struct intel_opregion *opregion = &dev_priv->opregion;
698
699 if (!opregion->header)
700 return;
701
702 if (opregion->acpi) {
d627b62f 703 if (drm_core_check_feature(dev, DRIVER_MODESET)) {
44834a67 704 intel_didl_outputs(dev);
d627b62f
L		 705 intel_setup_cadls(dev);
706 }
44834a67
CW		 707
708 /* Notify BIOS we are ready to handle ACPI video ext notifs.
709 * Right now, all the events are handled by the ACPI video module.
710 * We don't actually need to do anything with them. */
5bc4418b
BW		 711 iowrite32(0, &opregion->acpi->csts);
712 iowrite32(1, &opregion->acpi->drdy);
44834a67
CW		 713
714 system_opregion = opregion;
715 register_acpi_notifier(&intel_opregion_notifier);
716 }
717
68bca4b0 718 if (opregion->asle) {
68bca4b0
JN		 719 iowrite32(ASLE_TCHE_BLC_EN, &opregion->asle->tche);
720 iowrite32(ASLE_ARDY_READY, &opregion->asle->ardy);
721 }
44834a67
CW		 722}
723
724void intel_opregion_fini(struct drm_device *dev)
725{
726 struct drm_i915_private *dev_priv = dev->dev_private;
727 struct intel_opregion *opregion = &dev_priv->opregion;
728
729 if (!opregion->header)
730 return;
731
68bca4b0
JN		 732 if (opregion->asle)
733 iowrite32(ASLE_ARDY_NOT_READY, &opregion->asle->ardy);
734
44834a67 735 if (opregion->acpi) {
5bc4418b 736 iowrite32(0, &opregion->acpi->drdy);
44834a67
CW		 737
738 system_opregion = NULL;
739 unregister_acpi_notifier(&intel_opregion_notifier);
740 }
741
742 /* just clear all opregion memory pointers now */
743 iounmap(opregion->header);
744 opregion->header = NULL;
745 opregion->acpi = NULL;
746 opregion->swsci = NULL;
747 opregion->asle = NULL;
748 opregion->vbt = NULL;
794a79a6 749 opregion->lid_state = NULL;
44834a67 750}
ebde53c7
JN		 751
752static void swsci_setup(struct drm_device *dev)
753{
754 struct drm_i915_private *dev_priv = dev->dev_private;
755 struct intel_opregion *opregion = &dev_priv->opregion;
756 bool requested_callbacks = false;
757 u32 tmp;
758
759 /* Sub-function code 0 is okay, let's allow them. */
760 opregion->swsci_gbda_sub_functions = 1;
761 opregion->swsci_sbcb_sub_functions = 1;
762
763 /* We use GBDA to ask for supported GBDA calls. */
764 if (swsci(dev, SWSCI_GBDA_SUPPORTED_CALLS, 0, &tmp) == 0) {
765 /* make the bits match the sub-function codes */
766 tmp <<= 1;
767 opregion->swsci_gbda_sub_functions |= tmp;
768 }
769
770 /*
771 * We also use GBDA to ask for _requested_ SBCB callbacks. The driver
772 * must not call interfaces that are not specifically requested by the
773 * bios.
774 */
775 if (swsci(dev, SWSCI_GBDA_REQUESTED_CALLBACKS, 0, &tmp) == 0) {
776 /* here, the bits already match sub-function codes */
777 opregion->swsci_sbcb_sub_functions |= tmp;
778 requested_callbacks = true;
779 }
780
781 /*
782 * But we use SBCB to ask for _supported_ SBCB calls. This does not mean
783 * the callback is _requested_. But we still can't call interfaces that
784 * are not requested.
785 */
786 if (swsci(dev, SWSCI_SBCB_SUPPORTED_CALLBACKS, 0, &tmp) == 0) {
787 /* make the bits match the sub-function codes */
788 u32 low = tmp & 0x7ff;
789 u32 high = tmp & ~0xfff; /* bit 11 is reserved */
790 tmp = (high << 4) | (low << 1) | 1;
791
792 /* best guess what to do with supported wrt requested */
793 if (requested_callbacks) {
794 u32 req = opregion->swsci_sbcb_sub_functions;
795 if ((req & tmp) != req)
796 DRM_DEBUG_DRIVER("SWSCI BIOS requested (%08x) SBCB callbacks that are not supported (%08x)\n", req, tmp);
797 /* XXX: for now, trust the requested callbacks */
798 /* opregion->swsci_sbcb_sub_functions &= tmp; */
799 } else {
800 opregion->swsci_sbcb_sub_functions |= tmp;
801 }
802 }
803
804 DRM_DEBUG_DRIVER("SWSCI GBDA callbacks %08x, SBCB callbacks %08x\n",
805 opregion->swsci_gbda_sub_functions,
806 opregion->swsci_sbcb_sub_functions);
807}
808#else /* CONFIG_ACPI */
809static inline void swsci_setup(struct drm_device *dev) {}
810#endif /* CONFIG_ACPI */
44834a67
CW		 811
812int intel_opregion_setup(struct drm_device *dev)
8ee1c3db
MG		 813{
814 struct drm_i915_private *dev_priv = dev->dev_private;
815 struct intel_opregion *opregion = &dev_priv->opregion;
5bc4418b 816 void __iomem *base;
8ee1c3db 817 u32 asls, mboxes;
5bc4418b 818 char buf[sizeof(OPREGION_SIGNATURE)];
8ee1c3db
MG		 819 int err = 0;
820
821 pci_read_config_dword(dev->pdev, PCI_ASLS, &asls);
44d98a61 822 DRM_DEBUG_DRIVER("graphic opregion physical addr: 0x%x\n", asls);
8ee1c3db 823 if (asls == 0) {
44d98a61 824 DRM_DEBUG_DRIVER("ACPI OpRegion not supported!\n");
8ee1c3db
MG		 825 return -ENOTSUPP;
826 }
827
b705120e 828 base = acpi_os_ioremap(asls, OPREGION_SIZE);
8ee1c3db
MG		 829 if (!base)
830 return -ENOMEM;
831
5bc4418b
BW		 832 memcpy_fromio(buf, base, sizeof(buf));
833
834 if (memcmp(buf, OPREGION_SIGNATURE, 16)) {
44d98a61 835 DRM_DEBUG_DRIVER("opregion signature mismatch\n");
8ee1c3db
MG		 836 err = -EINVAL;
837 goto err_out;
838 }
44834a67
CW		 839 opregion->header = base;
840 opregion->vbt = base + OPREGION_VBT_OFFSET;
8ee1c3db 841
82d3c90c 842 opregion->lid_state = base + ACPI_CLID;
01fe9dbd 843
5bc4418b 844 mboxes = ioread32(&opregion->header->mboxes);
8ee1c3db 845 if (mboxes & MBOX_ACPI) {
44d98a61 846 DRM_DEBUG_DRIVER("Public ACPI methods supported\n");
8ee1c3db 847 opregion->acpi = base + OPREGION_ACPI_OFFSET;
8ee1c3db 848 }
8ee1c3db
MG		 849
850 if (mboxes & MBOX_SWSCI) {
44d98a61 851 DRM_DEBUG_DRIVER("SWSCI supported\n");
8ee1c3db 852 opregion->swsci = base + OPREGION_SWSCI_OFFSET;
ebde53c7 853 swsci_setup(dev);
8ee1c3db
MG		 854 }
855 if (mboxes & MBOX_ASLE) {
44d98a61 856 DRM_DEBUG_DRIVER("ASLE supported\n");
8ee1c3db 857 opregion->asle = base + OPREGION_ASLE_OFFSET;
68bca4b0
JN		 858
859 iowrite32(ASLE_ARDY_NOT_READY, &opregion->asle->ardy);
8ee1c3db
MG		 860 }
861
8ee1c3db
MG		 862 return 0;
863
864err_out:
30c56660 865 iounmap(base);
8ee1c3db
MG		 866 return err;
867}
Linux 6.x block layer and io_uring tree(s)