source: src/linux/universal/linux-4.9/drivers/gpu/drm/i915/intel_opregion.c @ 31662

Last change on this file since 31662 was 31662, checked in by brainslayer, 3 months ago

use new squashfs in all kernels

File size: 32.2 KB
Line 
1/*
2 * Copyright 2008 Intel Corporation <hong.liu@intel.com>
3 * Copyright 2008 Red Hat <mjg@redhat.com>
4 *
5 * Permission is hereby granted, free of charge, to any person obtaining
6 * a copy of this software and associated documentation files (the
7 * "Software"), to deal in the Software without restriction, including
8 * without limitation the rights to use, copy, modify, merge, publish,
9 * distribute, sub license, and/or sell copies of the Software, and to
10 * permit persons to whom the Software is furnished to do so, subject to
11 * the following conditions:
12 *
13 * The above copyright notice and this permission notice (including the
14 * next paragraph) shall be included in all copies or substantial
15 * portions of the Software.
16 *
17 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
18 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
19 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
20 * NON-INFRINGEMENT.  IN NO EVENT SHALL INTEL AND/OR ITS SUPPLIERS BE
21 * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
22 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
23 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
24 * SOFTWARE.
25 *
26 */
27
28#include <linux/acpi.h>
29#include <linux/dmi.h>
30#include <acpi/video.h>
31
32#include <drm/drmP.h>
33#include <drm/i915_drm.h>
34#include "i915_drv.h"
35#include "intel_drv.h"
36
37#define OPREGION_HEADER_OFFSET 0
38#define OPREGION_ACPI_OFFSET   0x100
39#define   ACPI_CLID 0x01ac /* current lid state indicator */
40#define   ACPI_CDCK 0x01b0 /* current docking state indicator */
41#define OPREGION_SWSCI_OFFSET  0x200
42#define OPREGION_ASLE_OFFSET   0x300
43#define OPREGION_VBT_OFFSET    0x400
44#define OPREGION_ASLE_EXT_OFFSET        0x1C00
45
46#define OPREGION_SIGNATURE "IntelGraphicsMem"
47#define MBOX_ACPI      (1<<0)
48#define MBOX_SWSCI     (1<<1)
49#define MBOX_ASLE      (1<<2)
50#define MBOX_ASLE_EXT  (1<<4)
51
52struct opregion_header {
53        u8 signature[16];
54        u32 size;
55        u32 opregion_ver;
56        u8 bios_ver[32];
57        u8 vbios_ver[16];
58        u8 driver_ver[16];
59        u32 mboxes;
60        u32 driver_model;
61        u32 pcon;
62        u8 dver[32];
63        u8 rsvd[124];
64} __packed;
65
66/* OpRegion mailbox #1: public ACPI methods */
67struct opregion_acpi {
68        u32 drdy;       /* driver readiness */
69        u32 csts;       /* notification status */
70        u32 cevt;       /* current event */
71        u8 rsvd1[20];
72        u32 didl[8];    /* supported display devices ID list */
73        u32 cpdl[8];    /* currently presented display list */
74        u32 cadl[8];    /* currently active display list */
75        u32 nadl[8];    /* next active devices list */
76        u32 aslp;       /* ASL sleep time-out */
77        u32 tidx;       /* toggle table index */
78        u32 chpd;       /* current hotplug enable indicator */
79        u32 clid;       /* current lid state*/
80        u32 cdck;       /* current docking state */
81        u32 sxsw;       /* Sx state resume */
82        u32 evts;       /* ASL supported events */
83        u32 cnot;       /* current OS notification */
84        u32 nrdy;       /* driver status */
85        u32 did2[7];    /* extended supported display devices ID list */
86        u32 cpd2[7];    /* extended attached display devices list */
87        u8 rsvd2[4];
88} __packed;
89
90/* OpRegion mailbox #2: SWSCI */
91struct opregion_swsci {
92        u32 scic;       /* SWSCI command|status|data */
93        u32 parm;       /* command parameters */
94        u32 dslp;       /* driver sleep time-out */
95        u8 rsvd[244];
96} __packed;
97
98/* OpRegion mailbox #3: ASLE */
99struct opregion_asle {
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 */
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        u64 fdss;
117        u32 fdsp;
118        u32 stat;
119        u64 rvda;       /* Physical address of raw vbt data */
120        u32 rvds;       /* Size of raw vbt data */
121        u8 rsvd[58];
122} __packed;
123
124/* OpRegion mailbox #5: ASLE ext */
125struct opregion_asle_ext {
126        u32 phed;       /* Panel Header */
127        u8 bddc[256];   /* Panel EDID */
128        u8 rsvd[764];
129} __packed;
130
131/* Driver readiness indicator */
132#define ASLE_ARDY_READY         (1 << 0)
133#define ASLE_ARDY_NOT_READY     (0 << 0)
134
135/* ASLE Interrupt Command (ASLC) bits */
136#define ASLC_SET_ALS_ILLUM              (1 << 0)
137#define ASLC_SET_BACKLIGHT              (1 << 1)
138#define ASLC_SET_PFIT                   (1 << 2)
139#define ASLC_SET_PWM_FREQ               (1 << 3)
140#define ASLC_SUPPORTED_ROTATION_ANGLES  (1 << 4)
141#define ASLC_BUTTON_ARRAY               (1 << 5)
142#define ASLC_CONVERTIBLE_INDICATOR      (1 << 6)
143#define ASLC_DOCKING_INDICATOR          (1 << 7)
144#define ASLC_ISCT_STATE_CHANGE          (1 << 8)
145#define ASLC_REQ_MSK                    0x1ff
146/* response bits */
147#define ASLC_ALS_ILLUM_FAILED           (1 << 10)
148#define ASLC_BACKLIGHT_FAILED           (1 << 12)
149#define ASLC_PFIT_FAILED                (1 << 14)
150#define ASLC_PWM_FREQ_FAILED            (1 << 16)
151#define ASLC_ROTATION_ANGLES_FAILED     (1 << 18)
152#define ASLC_BUTTON_ARRAY_FAILED        (1 << 20)
153#define ASLC_CONVERTIBLE_FAILED         (1 << 22)
154#define ASLC_DOCKING_FAILED             (1 << 24)
155#define ASLC_ISCT_STATE_FAILED          (1 << 26)
156
157/* Technology enabled indicator */
158#define ASLE_TCHE_ALS_EN        (1 << 0)
159#define ASLE_TCHE_BLC_EN        (1 << 1)
160#define ASLE_TCHE_PFIT_EN       (1 << 2)
161#define ASLE_TCHE_PFMB_EN       (1 << 3)
162
163/* ASLE backlight brightness to set */
164#define ASLE_BCLP_VALID                (1<<31)
165#define ASLE_BCLP_MSK          (~(1<<31))
166
167/* ASLE panel fitting request */
168#define ASLE_PFIT_VALID         (1<<31)
169#define ASLE_PFIT_CENTER (1<<0)
170#define ASLE_PFIT_STRETCH_TEXT (1<<1)
171#define ASLE_PFIT_STRETCH_GFX (1<<2)
172
173/* PWM frequency and minimum brightness */
174#define ASLE_PFMB_BRIGHTNESS_MASK (0xff)
175#define ASLE_PFMB_BRIGHTNESS_VALID (1<<8)
176#define ASLE_PFMB_PWM_MASK (0x7ffffe00)
177#define ASLE_PFMB_PWM_VALID (1<<31)
178
179#define ASLE_CBLV_VALID         (1<<31)
180
181/* IUER */
182#define ASLE_IUER_DOCKING               (1 << 7)
183#define ASLE_IUER_CONVERTIBLE           (1 << 6)
184#define ASLE_IUER_ROTATION_LOCK_BTN     (1 << 4)
185#define ASLE_IUER_VOLUME_DOWN_BTN       (1 << 3)
186#define ASLE_IUER_VOLUME_UP_BTN         (1 << 2)
187#define ASLE_IUER_WINDOWS_BTN           (1 << 1)
188#define ASLE_IUER_POWER_BTN             (1 << 0)
189
190/* Software System Control Interrupt (SWSCI) */
191#define SWSCI_SCIC_INDICATOR            (1 << 0)
192#define SWSCI_SCIC_MAIN_FUNCTION_SHIFT  1
193#define SWSCI_SCIC_MAIN_FUNCTION_MASK   (0xf << 1)
194#define SWSCI_SCIC_SUB_FUNCTION_SHIFT   8
195#define SWSCI_SCIC_SUB_FUNCTION_MASK    (0xff << 8)
196#define SWSCI_SCIC_EXIT_PARAMETER_SHIFT 8
197#define SWSCI_SCIC_EXIT_PARAMETER_MASK  (0xff << 8)
198#define SWSCI_SCIC_EXIT_STATUS_SHIFT    5
199#define SWSCI_SCIC_EXIT_STATUS_MASK     (7 << 5)
200#define SWSCI_SCIC_EXIT_STATUS_SUCCESS  1
201
202#define SWSCI_FUNCTION_CODE(main, sub) \
203        ((main) << SWSCI_SCIC_MAIN_FUNCTION_SHIFT | \
204         (sub) << SWSCI_SCIC_SUB_FUNCTION_SHIFT)
205
206/* SWSCI: Get BIOS Data (GBDA) */
207#define SWSCI_GBDA                      4
208#define SWSCI_GBDA_SUPPORTED_CALLS      SWSCI_FUNCTION_CODE(SWSCI_GBDA, 0)
209#define SWSCI_GBDA_REQUESTED_CALLBACKS  SWSCI_FUNCTION_CODE(SWSCI_GBDA, 1)
210#define SWSCI_GBDA_BOOT_DISPLAY_PREF    SWSCI_FUNCTION_CODE(SWSCI_GBDA, 4)
211#define SWSCI_GBDA_PANEL_DETAILS        SWSCI_FUNCTION_CODE(SWSCI_GBDA, 5)
212#define SWSCI_GBDA_TV_STANDARD          SWSCI_FUNCTION_CODE(SWSCI_GBDA, 6)
213#define SWSCI_GBDA_INTERNAL_GRAPHICS    SWSCI_FUNCTION_CODE(SWSCI_GBDA, 7)
214#define SWSCI_GBDA_SPREAD_SPECTRUM      SWSCI_FUNCTION_CODE(SWSCI_GBDA, 10)
215
216/* SWSCI: System BIOS Callbacks (SBCB) */
217#define SWSCI_SBCB                      6
218#define SWSCI_SBCB_SUPPORTED_CALLBACKS  SWSCI_FUNCTION_CODE(SWSCI_SBCB, 0)
219#define SWSCI_SBCB_INIT_COMPLETION      SWSCI_FUNCTION_CODE(SWSCI_SBCB, 1)
220#define SWSCI_SBCB_PRE_HIRES_SET_MODE   SWSCI_FUNCTION_CODE(SWSCI_SBCB, 3)
221#define SWSCI_SBCB_POST_HIRES_SET_MODE  SWSCI_FUNCTION_CODE(SWSCI_SBCB, 4)
222#define SWSCI_SBCB_DISPLAY_SWITCH       SWSCI_FUNCTION_CODE(SWSCI_SBCB, 5)
223#define SWSCI_SBCB_SET_TV_FORMAT        SWSCI_FUNCTION_CODE(SWSCI_SBCB, 6)
224#define SWSCI_SBCB_ADAPTER_POWER_STATE  SWSCI_FUNCTION_CODE(SWSCI_SBCB, 7)
225#define SWSCI_SBCB_DISPLAY_POWER_STATE  SWSCI_FUNCTION_CODE(SWSCI_SBCB, 8)
226#define SWSCI_SBCB_SET_BOOT_DISPLAY     SWSCI_FUNCTION_CODE(SWSCI_SBCB, 9)
227#define SWSCI_SBCB_SET_PANEL_DETAILS    SWSCI_FUNCTION_CODE(SWSCI_SBCB, 10)
228#define SWSCI_SBCB_SET_INTERNAL_GFX     SWSCI_FUNCTION_CODE(SWSCI_SBCB, 11)
229#define SWSCI_SBCB_POST_HIRES_TO_DOS_FS SWSCI_FUNCTION_CODE(SWSCI_SBCB, 16)
230#define SWSCI_SBCB_SUSPEND_RESUME       SWSCI_FUNCTION_CODE(SWSCI_SBCB, 17)
231#define SWSCI_SBCB_SET_SPREAD_SPECTRUM  SWSCI_FUNCTION_CODE(SWSCI_SBCB, 18)
232#define SWSCI_SBCB_POST_VBE_PM          SWSCI_FUNCTION_CODE(SWSCI_SBCB, 19)
233#define SWSCI_SBCB_ENABLE_DISABLE_AUDIO SWSCI_FUNCTION_CODE(SWSCI_SBCB, 21)
234
235/*
236 * ACPI Specification, Revision 5.0, Appendix B.3.2 _DOD (Enumerate All Devices
237 * Attached to the Display Adapter).
238 */
239#define ACPI_DISPLAY_INDEX_SHIFT                0
240#define ACPI_DISPLAY_INDEX_MASK                 (0xf << 0)
241#define ACPI_DISPLAY_PORT_ATTACHMENT_SHIFT      4
242#define ACPI_DISPLAY_PORT_ATTACHMENT_MASK       (0xf << 4)
243#define ACPI_DISPLAY_TYPE_SHIFT                 8
244#define ACPI_DISPLAY_TYPE_MASK                  (0xf << 8)
245#define ACPI_DISPLAY_TYPE_OTHER                 (0 << 8)
246#define ACPI_DISPLAY_TYPE_VGA                   (1 << 8)
247#define ACPI_DISPLAY_TYPE_TV                    (2 << 8)
248#define ACPI_DISPLAY_TYPE_EXTERNAL_DIGITAL      (3 << 8)
249#define ACPI_DISPLAY_TYPE_INTERNAL_DIGITAL      (4 << 8)
250#define ACPI_VENDOR_SPECIFIC_SHIFT              12
251#define ACPI_VENDOR_SPECIFIC_MASK               (0xf << 12)
252#define ACPI_BIOS_CAN_DETECT                    (1 << 16)
253#define ACPI_DEPENDS_ON_VGA                     (1 << 17)
254#define ACPI_PIPE_ID_SHIFT                      18
255#define ACPI_PIPE_ID_MASK                       (7 << 18)
256#define ACPI_DEVICE_ID_SCHEME                   (1 << 31)
257
258#define MAX_DSLP        1500
259
260static int swsci(struct drm_i915_private *dev_priv,
261                 u32 function, u32 parm, u32 *parm_out)
262{
263        struct opregion_swsci *swsci = dev_priv->opregion.swsci;
264        struct pci_dev *pdev = dev_priv->drm.pdev;
265        u32 main_function, sub_function, scic;
266        u16 swsci_val;
267        u32 dslp;
268
269        if (!swsci)
270                return -ENODEV;
271
272        main_function = (function & SWSCI_SCIC_MAIN_FUNCTION_MASK) >>
273                SWSCI_SCIC_MAIN_FUNCTION_SHIFT;
274        sub_function = (function & SWSCI_SCIC_SUB_FUNCTION_MASK) >>
275                SWSCI_SCIC_SUB_FUNCTION_SHIFT;
276
277        /* Check if we can call the function. See swsci_setup for details. */
278        if (main_function == SWSCI_SBCB) {
279                if ((dev_priv->opregion.swsci_sbcb_sub_functions &
280                     (1 << sub_function)) == 0)
281                        return -EINVAL;
282        } else if (main_function == SWSCI_GBDA) {
283                if ((dev_priv->opregion.swsci_gbda_sub_functions &
284                     (1 << sub_function)) == 0)
285                        return -EINVAL;
286        }
287
288        /* Driver sleep timeout in ms. */
289        dslp = swsci->dslp;
290        if (!dslp) {
291                /* The spec says 2ms should be the default, but it's too small
292                 * for some machines. */
293                dslp = 50;
294        } else if (dslp > MAX_DSLP) {
295                /* Hey bios, trust must be earned. */
296                DRM_INFO_ONCE("ACPI BIOS requests an excessive sleep of %u ms, "
297                              "using %u ms instead\n", dslp, MAX_DSLP);
298                dslp = MAX_DSLP;
299        }
300
301        /* The spec tells us to do this, but we are the only user... */
302        scic = swsci->scic;
303        if (scic & SWSCI_SCIC_INDICATOR) {
304                DRM_DEBUG_DRIVER("SWSCI request already in progress\n");
305                return -EBUSY;
306        }
307
308        scic = function | SWSCI_SCIC_INDICATOR;
309
310        swsci->parm = parm;
311        swsci->scic = scic;
312
313        /* Ensure SCI event is selected and event trigger is cleared. */
314        pci_read_config_word(pdev, SWSCI, &swsci_val);
315        if (!(swsci_val & SWSCI_SCISEL) || (swsci_val & SWSCI_GSSCIE)) {
316                swsci_val |= SWSCI_SCISEL;
317                swsci_val &= ~SWSCI_GSSCIE;
318                pci_write_config_word(pdev, SWSCI, swsci_val);
319        }
320
321        /* Use event trigger to tell bios to check the mail. */
322        swsci_val |= SWSCI_GSSCIE;
323        pci_write_config_word(pdev, SWSCI, swsci_val);
324
325        /* Poll for the result. */
326#define C (((scic = swsci->scic) & SWSCI_SCIC_INDICATOR) == 0)
327        if (wait_for(C, dslp)) {
328                DRM_DEBUG_DRIVER("SWSCI request timed out\n");
329                return -ETIMEDOUT;
330        }
331
332        scic = (scic & SWSCI_SCIC_EXIT_STATUS_MASK) >>
333                SWSCI_SCIC_EXIT_STATUS_SHIFT;
334
335        /* Note: scic == 0 is an error! */
336        if (scic != SWSCI_SCIC_EXIT_STATUS_SUCCESS) {
337                DRM_DEBUG_DRIVER("SWSCI request error %u\n", scic);
338                return -EIO;
339        }
340
341        if (parm_out)
342                *parm_out = swsci->parm;
343
344        return 0;
345
346#undef C
347}
348
349#define DISPLAY_TYPE_CRT                        0
350#define DISPLAY_TYPE_TV                         1
351#define DISPLAY_TYPE_EXTERNAL_FLAT_PANEL        2
352#define DISPLAY_TYPE_INTERNAL_FLAT_PANEL        3
353
354int intel_opregion_notify_encoder(struct intel_encoder *intel_encoder,
355                                  bool enable)
356{
357        struct drm_i915_private *dev_priv = to_i915(intel_encoder->base.dev);
358        u32 parm = 0;
359        u32 type = 0;
360        u32 port;
361
362        /* don't care about old stuff for now */
363        if (!HAS_DDI(dev_priv))
364                return 0;
365
366        if (intel_encoder->type == INTEL_OUTPUT_DSI)
367                port = 0;
368        else
369                port = intel_ddi_get_encoder_port(intel_encoder);
370
371        if (port == PORT_E)  {
372                port = 0;
373        } else {
374                parm |= 1 << port;
375                port++;
376        }
377
378        if (!enable)
379                parm |= 4 << 8;
380
381        switch (intel_encoder->type) {
382        case INTEL_OUTPUT_ANALOG:
383                type = DISPLAY_TYPE_CRT;
384                break;
385        case INTEL_OUTPUT_UNKNOWN:
386        case INTEL_OUTPUT_DP:
387        case INTEL_OUTPUT_HDMI:
388        case INTEL_OUTPUT_DP_MST:
389                type = DISPLAY_TYPE_EXTERNAL_FLAT_PANEL;
390                break;
391        case INTEL_OUTPUT_EDP:
392        case INTEL_OUTPUT_DSI:
393                type = DISPLAY_TYPE_INTERNAL_FLAT_PANEL;
394                break;
395        default:
396                WARN_ONCE(1, "unsupported intel_encoder type %d\n",
397                          intel_encoder->type);
398                return -EINVAL;
399        }
400
401        parm |= type << (16 + port * 3);
402
403        return swsci(dev_priv, SWSCI_SBCB_DISPLAY_POWER_STATE, parm, NULL);
404}
405
406static const struct {
407        pci_power_t pci_power_state;
408        u32 parm;
409} power_state_map[] = {
410        { PCI_D0,       0x00 },
411        { PCI_D1,       0x01 },
412        { PCI_D2,       0x02 },
413        { PCI_D3hot,    0x04 },
414        { PCI_D3cold,   0x04 },
415};
416
417int intel_opregion_notify_adapter(struct drm_i915_private *dev_priv,
418                                  pci_power_t state)
419{
420        int i;
421
422        if (!HAS_DDI(dev_priv))
423                return 0;
424
425        for (i = 0; i < ARRAY_SIZE(power_state_map); i++) {
426                if (state == power_state_map[i].pci_power_state)
427                        return swsci(dev_priv, SWSCI_SBCB_ADAPTER_POWER_STATE,
428                                     power_state_map[i].parm, NULL);
429        }
430
431        return -EINVAL;
432}
433
434static u32 asle_set_backlight(struct drm_i915_private *dev_priv, u32 bclp)
435{
436        struct intel_connector *connector;
437        struct opregion_asle *asle = dev_priv->opregion.asle;
438        struct drm_device *dev = &dev_priv->drm;
439
440        DRM_DEBUG_DRIVER("bclp = 0x%08x\n", bclp);
441
442        if (acpi_video_get_backlight_type() == acpi_backlight_native) {
443                DRM_DEBUG_KMS("opregion backlight request ignored\n");
444                return 0;
445        }
446
447        if (!(bclp & ASLE_BCLP_VALID))
448                return ASLC_BACKLIGHT_FAILED;
449
450        bclp &= ASLE_BCLP_MSK;
451        if (bclp > 255)
452                return ASLC_BACKLIGHT_FAILED;
453
454        drm_modeset_lock(&dev->mode_config.connection_mutex, NULL);
455
456        /*
457         * Update backlight on all connectors that support backlight (usually
458         * only one).
459         */
460        DRM_DEBUG_KMS("updating opregion backlight %d/255\n", bclp);
461        for_each_intel_connector(dev, connector)
462                intel_panel_set_backlight_acpi(connector, bclp, 255);
463        asle->cblv = DIV_ROUND_UP(bclp * 100, 255) | ASLE_CBLV_VALID;
464
465        drm_modeset_unlock(&dev->mode_config.connection_mutex);
466
467
468        return 0;
469}
470
471static u32 asle_set_als_illum(struct drm_i915_private *dev_priv, u32 alsi)
472{
473        /* alsi is the current ALS reading in lux. 0 indicates below sensor
474           range, 0xffff indicates above sensor range. 1-0xfffe are valid */
475        DRM_DEBUG_DRIVER("Illum is not supported\n");
476        return ASLC_ALS_ILLUM_FAILED;
477}
478
479static u32 asle_set_pwm_freq(struct drm_i915_private *dev_priv, u32 pfmb)
480{
481        DRM_DEBUG_DRIVER("PWM freq is not supported\n");
482        return ASLC_PWM_FREQ_FAILED;
483}
484
485static u32 asle_set_pfit(struct drm_i915_private *dev_priv, u32 pfit)
486{
487        /* Panel fitting is currently controlled by the X code, so this is a
488           noop until modesetting support works fully */
489        DRM_DEBUG_DRIVER("Pfit is not supported\n");
490        return ASLC_PFIT_FAILED;
491}
492
493static u32 asle_set_supported_rotation_angles(struct drm_i915_private *dev_priv, u32 srot)
494{
495        DRM_DEBUG_DRIVER("SROT is not supported\n");
496        return ASLC_ROTATION_ANGLES_FAILED;
497}
498
499static u32 asle_set_button_array(struct drm_i915_private *dev_priv, u32 iuer)
500{
501        if (!iuer)
502                DRM_DEBUG_DRIVER("Button array event is not supported (nothing)\n");
503        if (iuer & ASLE_IUER_ROTATION_LOCK_BTN)
504                DRM_DEBUG_DRIVER("Button array event is not supported (rotation lock)\n");
505        if (iuer & ASLE_IUER_VOLUME_DOWN_BTN)
506                DRM_DEBUG_DRIVER("Button array event is not supported (volume down)\n");
507        if (iuer & ASLE_IUER_VOLUME_UP_BTN)
508                DRM_DEBUG_DRIVER("Button array event is not supported (volume up)\n");
509        if (iuer & ASLE_IUER_WINDOWS_BTN)
510                DRM_DEBUG_DRIVER("Button array event is not supported (windows)\n");
511        if (iuer & ASLE_IUER_POWER_BTN)
512                DRM_DEBUG_DRIVER("Button array event is not supported (power)\n");
513
514        return ASLC_BUTTON_ARRAY_FAILED;
515}
516
517static u32 asle_set_convertible(struct drm_i915_private *dev_priv, u32 iuer)
518{
519        if (iuer & ASLE_IUER_CONVERTIBLE)
520                DRM_DEBUG_DRIVER("Convertible is not supported (clamshell)\n");
521        else
522                DRM_DEBUG_DRIVER("Convertible is not supported (slate)\n");
523
524        return ASLC_CONVERTIBLE_FAILED;
525}
526
527static u32 asle_set_docking(struct drm_i915_private *dev_priv, u32 iuer)
528{
529        if (iuer & ASLE_IUER_DOCKING)
530                DRM_DEBUG_DRIVER("Docking is not supported (docked)\n");
531        else
532                DRM_DEBUG_DRIVER("Docking is not supported (undocked)\n");
533
534        return ASLC_DOCKING_FAILED;
535}
536
537static u32 asle_isct_state(struct drm_i915_private *dev_priv)
538{
539        DRM_DEBUG_DRIVER("ISCT is not supported\n");
540        return ASLC_ISCT_STATE_FAILED;
541}
542
543static void asle_work(struct work_struct *work)
544{
545        struct intel_opregion *opregion =
546                container_of(work, struct intel_opregion, asle_work);
547        struct drm_i915_private *dev_priv =
548                container_of(opregion, struct drm_i915_private, opregion);
549        struct opregion_asle *asle = dev_priv->opregion.asle;
550        u32 aslc_stat = 0;
551        u32 aslc_req;
552
553        if (!asle)
554                return;
555
556        aslc_req = asle->aslc;
557
558        if (!(aslc_req & ASLC_REQ_MSK)) {
559                DRM_DEBUG_DRIVER("No request on ASLC interrupt 0x%08x\n",
560                                 aslc_req);
561                return;
562        }
563
564        if (aslc_req & ASLC_SET_ALS_ILLUM)
565                aslc_stat |= asle_set_als_illum(dev_priv, asle->alsi);
566
567        if (aslc_req & ASLC_SET_BACKLIGHT)
568                aslc_stat |= asle_set_backlight(dev_priv, asle->bclp);
569
570        if (aslc_req & ASLC_SET_PFIT)
571                aslc_stat |= asle_set_pfit(dev_priv, asle->pfit);
572
573        if (aslc_req & ASLC_SET_PWM_FREQ)
574                aslc_stat |= asle_set_pwm_freq(dev_priv, asle->pfmb);
575
576        if (aslc_req & ASLC_SUPPORTED_ROTATION_ANGLES)
577                aslc_stat |= asle_set_supported_rotation_angles(dev_priv,
578                                                        asle->srot);
579
580        if (aslc_req & ASLC_BUTTON_ARRAY)
581                aslc_stat |= asle_set_button_array(dev_priv, asle->iuer);
582
583        if (aslc_req & ASLC_CONVERTIBLE_INDICATOR)
584                aslc_stat |= asle_set_convertible(dev_priv, asle->iuer);
585
586        if (aslc_req & ASLC_DOCKING_INDICATOR)
587                aslc_stat |= asle_set_docking(dev_priv, asle->iuer);
588
589        if (aslc_req & ASLC_ISCT_STATE_CHANGE)
590                aslc_stat |= asle_isct_state(dev_priv);
591
592        asle->aslc = aslc_stat;
593}
594
595void intel_opregion_asle_intr(struct drm_i915_private *dev_priv)
596{
597        if (dev_priv->opregion.asle)
598                schedule_work(&dev_priv->opregion.asle_work);
599}
600
601#define ACPI_EV_DISPLAY_SWITCH (1<<0)
602#define ACPI_EV_LID            (1<<1)
603#define ACPI_EV_DOCK           (1<<2)
604
605static struct intel_opregion *system_opregion;
606
607static int intel_opregion_video_event(struct notifier_block *nb,
608                                      unsigned long val, void *data)
609{
610        /* The only video events relevant to opregion are 0x80. These indicate
611           either a docking event, lid switch or display switch request. In
612           Linux, these are handled by the dock, button and video drivers.
613        */
614
615        struct acpi_bus_event *event = data;
616        struct opregion_acpi *acpi;
617        int ret = NOTIFY_OK;
618
619        if (strcmp(event->device_class, ACPI_VIDEO_CLASS) != 0)
620                return NOTIFY_DONE;
621
622        if (!system_opregion)
623                return NOTIFY_DONE;
624
625        acpi = system_opregion->acpi;
626
627        if (event->type == 0x80 && ((acpi->cevt & 1) == 0))
628                ret = NOTIFY_BAD;
629
630        acpi->csts = 0;
631
632        return ret;
633}
634
635static struct notifier_block intel_opregion_notifier = {
636        .notifier_call = intel_opregion_video_event,
637};
638
639/*
640 * Initialise the DIDL field in opregion. This passes a list of devices to
641 * the firmware. Values are defined by section B.4.2 of the ACPI specification
642 * (version 3)
643 */
644
645static u32 get_did(struct intel_opregion *opregion, int i)
646{
647        u32 did;
648
649        if (i < ARRAY_SIZE(opregion->acpi->didl)) {
650                did = opregion->acpi->didl[i];
651        } else {
652                i -= ARRAY_SIZE(opregion->acpi->didl);
653
654                if (WARN_ON(i >= ARRAY_SIZE(opregion->acpi->did2)))
655                        return 0;
656
657                did = opregion->acpi->did2[i];
658        }
659
660        return did;
661}
662
663static void set_did(struct intel_opregion *opregion, int i, u32 val)
664{
665        if (i < ARRAY_SIZE(opregion->acpi->didl)) {
666                opregion->acpi->didl[i] = val;
667        } else {
668                i -= ARRAY_SIZE(opregion->acpi->didl);
669
670                if (WARN_ON(i >= ARRAY_SIZE(opregion->acpi->did2)))
671                        return;
672
673                opregion->acpi->did2[i] = val;
674        }
675}
676
677static u32 acpi_display_type(struct drm_connector *connector)
678{
679        u32 display_type;
680
681        switch (connector->connector_type) {
682        case DRM_MODE_CONNECTOR_VGA:
683        case DRM_MODE_CONNECTOR_DVIA:
684                display_type = ACPI_DISPLAY_TYPE_VGA;
685                break;
686        case DRM_MODE_CONNECTOR_Composite:
687        case DRM_MODE_CONNECTOR_SVIDEO:
688        case DRM_MODE_CONNECTOR_Component:
689        case DRM_MODE_CONNECTOR_9PinDIN:
690        case DRM_MODE_CONNECTOR_TV:
691                display_type = ACPI_DISPLAY_TYPE_TV;
692                break;
693        case DRM_MODE_CONNECTOR_DVII:
694        case DRM_MODE_CONNECTOR_DVID:
695        case DRM_MODE_CONNECTOR_DisplayPort:
696        case DRM_MODE_CONNECTOR_HDMIA:
697        case DRM_MODE_CONNECTOR_HDMIB:
698                display_type = ACPI_DISPLAY_TYPE_EXTERNAL_DIGITAL;
699                break;
700        case DRM_MODE_CONNECTOR_LVDS:
701        case DRM_MODE_CONNECTOR_eDP:
702        case DRM_MODE_CONNECTOR_DSI:
703                display_type = ACPI_DISPLAY_TYPE_INTERNAL_DIGITAL;
704                break;
705        case DRM_MODE_CONNECTOR_Unknown:
706        case DRM_MODE_CONNECTOR_VIRTUAL:
707                display_type = ACPI_DISPLAY_TYPE_OTHER;
708                break;
709        default:
710                MISSING_CASE(connector->connector_type);
711                display_type = ACPI_DISPLAY_TYPE_OTHER;
712                break;
713        }
714
715        return display_type;
716}
717
718static void intel_didl_outputs(struct drm_i915_private *dev_priv)
719{
720        struct intel_opregion *opregion = &dev_priv->opregion;
721        struct pci_dev *pdev = dev_priv->drm.pdev;
722        struct drm_connector *connector;
723        acpi_handle handle;
724        struct acpi_device *acpi_dev, *acpi_cdev, *acpi_video_bus = NULL;
725        unsigned long long device_id;
726        acpi_status status;
727        u32 temp, max_outputs;
728        int i = 0;
729
730        handle = ACPI_HANDLE(&pdev->dev);
731        if (!handle || acpi_bus_get_device(handle, &acpi_dev))
732                return;
733
734        if (acpi_is_video_device(handle))
735                acpi_video_bus = acpi_dev;
736        else {
737                list_for_each_entry(acpi_cdev, &acpi_dev->children, node) {
738                        if (acpi_is_video_device(acpi_cdev->handle)) {
739                                acpi_video_bus = acpi_cdev;
740                                break;
741                        }
742                }
743        }
744
745        if (!acpi_video_bus) {
746                DRM_DEBUG_KMS("No ACPI video bus found\n");
747                return;
748        }
749
750        /*
751         * In theory, did2, the extended didl, gets added at opregion version
752         * 3.0. In practice, however, we're supposed to set it for earlier
753         * versions as well, since a BIOS that doesn't understand did2 should
754         * not look at it anyway. Use a variable so we can tweak this if a need
755         * arises later.
756         */
757        max_outputs = ARRAY_SIZE(opregion->acpi->didl) +
758                ARRAY_SIZE(opregion->acpi->did2);
759
760        list_for_each_entry(acpi_cdev, &acpi_video_bus->children, node) {
761                if (i >= max_outputs) {
762                        DRM_DEBUG_KMS("More than %u outputs detected via ACPI\n",
763                                      max_outputs);
764                        return;
765                }
766                status = acpi_evaluate_integer(acpi_cdev->handle, "_ADR",
767                                               NULL, &device_id);
768                if (ACPI_SUCCESS(status)) {
769                        if (!device_id)
770                                goto blind_set;
771                        set_did(opregion, i++, (u32)(device_id & 0x0f0f));
772                }
773        }
774
775end:
776        DRM_DEBUG_KMS("%d outputs detected\n", i);
777
778        /* If fewer than max outputs, the list must be null terminated */
779        if (i < max_outputs)
780                set_did(opregion, i, 0);
781        return;
782
783blind_set:
784        i = 0;
785        list_for_each_entry(connector,
786                            &dev_priv->drm.mode_config.connector_list, head) {
787                int display_type = acpi_display_type(connector);
788
789                if (i >= max_outputs) {
790                        DRM_DEBUG_KMS("More than %u outputs in connector list\n",
791                                      max_outputs);
792                        return;
793                }
794
795                temp = get_did(opregion, i);
796                set_did(opregion, i, temp | (1 << 31) | display_type | i);
797                i++;
798        }
799        goto end;
800}
801
802static void intel_setup_cadls(struct drm_i915_private *dev_priv)
803{
804        struct intel_opregion *opregion = &dev_priv->opregion;
805        int i = 0;
806        u32 disp_id;
807
808        /* Initialize the CADL field by duplicating the DIDL values.
809         * Technically, this is not always correct as display outputs may exist,
810         * but not active. This initialization is necessary for some Clevo
811         * laptops that check this field before processing the brightness and
812         * display switching hotkeys. Just like DIDL, CADL is NULL-terminated if
813         * there are less than eight devices. */
814        do {
815                disp_id = get_did(opregion, i);
816                opregion->acpi->cadl[i] = disp_id;
817        } while (++i < 8 && disp_id != 0);
818}
819
820void intel_opregion_register(struct drm_i915_private *dev_priv)
821{
822        struct intel_opregion *opregion = &dev_priv->opregion;
823
824        if (!opregion->header)
825                return;
826
827        if (opregion->acpi) {
828                intel_didl_outputs(dev_priv);
829                intel_setup_cadls(dev_priv);
830
831                /* Notify BIOS we are ready to handle ACPI video ext notifs.
832                 * Right now, all the events are handled by the ACPI video module.
833                 * We don't actually need to do anything with them. */
834                opregion->acpi->csts = 0;
835                opregion->acpi->drdy = 1;
836
837                system_opregion = opregion;
838                register_acpi_notifier(&intel_opregion_notifier);
839        }
840
841        if (opregion->asle) {
842                opregion->asle->tche = ASLE_TCHE_BLC_EN;
843                opregion->asle->ardy = ASLE_ARDY_READY;
844        }
845}
846
847void intel_opregion_unregister(struct drm_i915_private *dev_priv)
848{
849        struct intel_opregion *opregion = &dev_priv->opregion;
850
851        if (!opregion->header)
852                return;
853
854        if (opregion->asle)
855                opregion->asle->ardy = ASLE_ARDY_NOT_READY;
856
857        cancel_work_sync(&dev_priv->opregion.asle_work);
858
859        if (opregion->acpi) {
860                opregion->acpi->drdy = 0;
861
862                system_opregion = NULL;
863                unregister_acpi_notifier(&intel_opregion_notifier);
864        }
865
866        /* just clear all opregion memory pointers now */
867        memunmap(opregion->header);
868        if (opregion->rvda) {
869                memunmap(opregion->rvda);
870                opregion->rvda = NULL;
871        }
872        opregion->header = NULL;
873        opregion->acpi = NULL;
874        opregion->swsci = NULL;
875        opregion->asle = NULL;
876        opregion->vbt = NULL;
877        opregion->lid_state = NULL;
878}
879
880static void swsci_setup(struct drm_i915_private *dev_priv)
881{
882        struct intel_opregion *opregion = &dev_priv->opregion;
883        bool requested_callbacks = false;
884        u32 tmp;
885
886        /* Sub-function code 0 is okay, let's allow them. */
887        opregion->swsci_gbda_sub_functions = 1;
888        opregion->swsci_sbcb_sub_functions = 1;
889
890        /* We use GBDA to ask for supported GBDA calls. */
891        if (swsci(dev_priv, SWSCI_GBDA_SUPPORTED_CALLS, 0, &tmp) == 0) {
892                /* make the bits match the sub-function codes */
893                tmp <<= 1;
894                opregion->swsci_gbda_sub_functions |= tmp;
895        }
896
897        /*
898         * We also use GBDA to ask for _requested_ SBCB callbacks. The driver
899         * must not call interfaces that are not specifically requested by the
900         * bios.
901         */
902        if (swsci(dev_priv, SWSCI_GBDA_REQUESTED_CALLBACKS, 0, &tmp) == 0) {
903                /* here, the bits already match sub-function codes */
904                opregion->swsci_sbcb_sub_functions |= tmp;
905                requested_callbacks = true;
906        }
907
908        /*
909         * But we use SBCB to ask for _supported_ SBCB calls. This does not mean
910         * the callback is _requested_. But we still can't call interfaces that
911         * are not requested.
912         */
913        if (swsci(dev_priv, SWSCI_SBCB_SUPPORTED_CALLBACKS, 0, &tmp) == 0) {
914                /* make the bits match the sub-function codes */
915                u32 low = tmp & 0x7ff;
916                u32 high = tmp & ~0xfff; /* bit 11 is reserved */
917                tmp = (high << 4) | (low << 1) | 1;
918
919                /* best guess what to do with supported wrt requested */
920                if (requested_callbacks) {
921                        u32 req = opregion->swsci_sbcb_sub_functions;
922                        if ((req & tmp) != req)
923                                DRM_DEBUG_DRIVER("SWSCI BIOS requested (%08x) SBCB callbacks that are not supported (%08x)\n", req, tmp);
924                        /* XXX: for now, trust the requested callbacks */
925                        /* opregion->swsci_sbcb_sub_functions &= tmp; */
926                } else {
927                        opregion->swsci_sbcb_sub_functions |= tmp;
928                }
929        }
930
931        DRM_DEBUG_DRIVER("SWSCI GBDA callbacks %08x, SBCB callbacks %08x\n",
932                         opregion->swsci_gbda_sub_functions,
933                         opregion->swsci_sbcb_sub_functions);
934}
935
936static int intel_no_opregion_vbt_callback(const struct dmi_system_id *id)
937{
938        DRM_DEBUG_KMS("Falling back to manually reading VBT from "
939                      "VBIOS ROM for %s\n", id->ident);
940        return 1;
941}
942
943static const struct dmi_system_id intel_no_opregion_vbt[] = {
944        {
945                .callback = intel_no_opregion_vbt_callback,
946                .ident = "ThinkCentre A57",
947                .matches = {
948                        DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
949                        DMI_MATCH(DMI_PRODUCT_NAME, "97027RG"),
950                },
951        },
952        { }
953};
954
955int intel_opregion_setup(struct drm_i915_private *dev_priv)
956{
957        struct intel_opregion *opregion = &dev_priv->opregion;
958        struct pci_dev *pdev = dev_priv->drm.pdev;
959        u32 asls, mboxes;
960        char buf[sizeof(OPREGION_SIGNATURE)];
961        int err = 0;
962        void *base;
963
964        BUILD_BUG_ON(sizeof(struct opregion_header) != 0x100);
965        BUILD_BUG_ON(sizeof(struct opregion_acpi) != 0x100);
966        BUILD_BUG_ON(sizeof(struct opregion_swsci) != 0x100);
967        BUILD_BUG_ON(sizeof(struct opregion_asle) != 0x100);
968        BUILD_BUG_ON(sizeof(struct opregion_asle_ext) != 0x400);
969
970        pci_read_config_dword(pdev, ASLS, &asls);
971        DRM_DEBUG_DRIVER("graphic opregion physical addr: 0x%x\n", asls);
972        if (asls == 0) {
973                DRM_DEBUG_DRIVER("ACPI OpRegion not supported!\n");
974                return -ENOTSUPP;
975        }
976
977        INIT_WORK(&opregion->asle_work, asle_work);
978
979        base = memremap(asls, OPREGION_SIZE, MEMREMAP_WB);
980        if (!base)
981                return -ENOMEM;
982
983        memcpy(buf, base, sizeof(buf));
984
985        if (memcmp(buf, OPREGION_SIGNATURE, 16)) {
986                DRM_DEBUG_DRIVER("opregion signature mismatch\n");
987                err = -EINVAL;
988                goto err_out;
989        }
990        opregion->header = base;
991        opregion->lid_state = base + ACPI_CLID;
992
993        mboxes = opregion->header->mboxes;
994        if (mboxes & MBOX_ACPI) {
995                DRM_DEBUG_DRIVER("Public ACPI methods supported\n");
996                opregion->acpi = base + OPREGION_ACPI_OFFSET;
997        }
998
999        if (mboxes & MBOX_SWSCI) {
1000                DRM_DEBUG_DRIVER("SWSCI supported\n");
1001                opregion->swsci = base + OPREGION_SWSCI_OFFSET;
1002                swsci_setup(dev_priv);
1003        }
1004
1005        if (mboxes & MBOX_ASLE) {
1006                DRM_DEBUG_DRIVER("ASLE supported\n");
1007                opregion->asle = base + OPREGION_ASLE_OFFSET;
1008
1009                opregion->asle->ardy = ASLE_ARDY_NOT_READY;
1010        }
1011
1012        if (mboxes & MBOX_ASLE_EXT)
1013                DRM_DEBUG_DRIVER("ASLE extension supported\n");
1014
1015        if (!dmi_check_system(intel_no_opregion_vbt)) {
1016                const void *vbt = NULL;
1017                u32 vbt_size = 0;
1018
1019                if (opregion->header->opregion_ver >= 2 && opregion->asle &&
1020                    opregion->asle->rvda && opregion->asle->rvds) {
1021                        opregion->rvda = memremap(opregion->asle->rvda,
1022                                                  opregion->asle->rvds,
1023                                                  MEMREMAP_WB);
1024                        vbt = opregion->rvda;
1025                        vbt_size = opregion->asle->rvds;
1026                }
1027
1028                if (intel_bios_is_valid_vbt(vbt, vbt_size)) {
1029                        DRM_DEBUG_KMS("Found valid VBT in ACPI OpRegion (RVDA)\n");
1030                        opregion->vbt = vbt;
1031                        opregion->vbt_size = vbt_size;
1032                } else {
1033                        vbt = base + OPREGION_VBT_OFFSET;
1034                        /*
1035                         * The VBT specification says that if the ASLE ext
1036                         * mailbox is not used its area is reserved, but
1037                         * on some CHT boards the VBT extends into the
1038                         * ASLE ext area. Allow this even though it is
1039                         * against the spec, so we do not end up rejecting
1040                         * the VBT on those boards (and end up not finding the
1041                         * LCD panel because of this).
1042                         */
1043                        vbt_size = (mboxes & MBOX_ASLE_EXT) ?
1044                                OPREGION_ASLE_EXT_OFFSET : OPREGION_SIZE;
1045                        vbt_size -= OPREGION_VBT_OFFSET;
1046                        if (intel_bios_is_valid_vbt(vbt, vbt_size)) {
1047                                DRM_DEBUG_KMS("Found valid VBT in ACPI OpRegion (Mailbox #4)\n");
1048                                opregion->vbt = vbt;
1049                                opregion->vbt_size = vbt_size;
1050                        }
1051                }
1052        }
1053
1054        return 0;
1055
1056err_out:
1057        memunmap(base);
1058        return err;
1059}
1060
1061static int intel_use_opregion_panel_type_callback(const struct dmi_system_id *id)
1062{
1063        DRM_INFO("Using panel type from OpRegion on %s\n", id->ident);
1064        return 1;
1065}
1066
1067static const struct dmi_system_id intel_use_opregion_panel_type[] = {
1068        {
1069                .callback = intel_use_opregion_panel_type_callback,
1070                .ident = "Conrac GmbH IX45GM2",
1071                .matches = {DMI_MATCH(DMI_SYS_VENDOR, "Conrac GmbH"),
1072                            DMI_MATCH(DMI_PRODUCT_NAME, "IX45GM2"),
1073                },
1074        },
1075        { }
1076};
1077
1078int
1079intel_opregion_get_panel_type(struct drm_i915_private *dev_priv)
1080{
1081        u32 panel_details;
1082        int ret;
1083
1084        ret = swsci(dev_priv, SWSCI_GBDA_PANEL_DETAILS, 0x0, &panel_details);
1085        if (ret) {
1086                DRM_DEBUG_KMS("Failed to get panel details from OpRegion (%d)\n",
1087                              ret);
1088                return ret;
1089        }
1090
1091        ret = (panel_details >> 8) & 0xff;
1092        if (ret > 0x10) {
1093                DRM_DEBUG_KMS("Invalid OpRegion panel type 0x%x\n", ret);
1094                return -EINVAL;
1095        }
1096
1097        /* fall back to VBT panel type? */
1098        if (ret == 0x0) {
1099                DRM_DEBUG_KMS("No panel type in OpRegion\n");
1100                return -ENODEV;
1101        }
1102
1103        /*
1104         * So far we know that some machined must use it, others must not use it.
1105         * There doesn't seem to be any way to determine which way to go, except
1106         * via a quirk list :(
1107         */
1108        if (!dmi_check_system(intel_use_opregion_panel_type)) {
1109                DRM_DEBUG_KMS("Ignoring OpRegion panel type (%d)\n", ret - 1);
1110                return -ENODEV;
1111        }
1112
1113        /*
1114         * FIXME On Dell XPS 13 9350 the OpRegion panel type (0) gives us
1115         * low vswing for eDP, whereas the VBT panel type (2) gives us normal
1116         * vswing instead. Low vswing results in some display flickers, so
1117         * let's simply ignore the OpRegion panel type on SKL for now.
1118         */
1119        if (IS_SKYLAKE(dev_priv)) {
1120                DRM_DEBUG_KMS("Ignoring OpRegion panel type (%d)\n", ret - 1);
1121                return -ENODEV;
1122        }
1123
1124        return ret - 1;
1125}
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