Merge branch 'drm-intel-fixes' of git://people.freedesktop.org/~danvet/drm-intel...
[~shefty/rdma-dev.git] / drivers / gpu / drm / i915 / intel_crt.c
1 /*
2  * Copyright © 2006-2007 Intel Corporation
3  *
4  * Permission is hereby granted, free of charge, to any person obtaining a
5  * copy of this software and associated documentation files (the "Software"),
6  * to deal in the Software without restriction, including without limitation
7  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
8  * and/or sell copies of the Software, and to permit persons to whom the
9  * Software is furnished to do so, subject to the following conditions:
10  *
11  * The above copyright notice and this permission notice (including the next
12  * paragraph) shall be included in all copies or substantial portions of the
13  * Software.
14  *
15  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
16  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
17  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
18  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
19  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
20  * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
21  * DEALINGS IN THE SOFTWARE.
22  *
23  * Authors:
24  *      Eric Anholt <eric@anholt.net>
25  */
26
27 #include <linux/dmi.h>
28 #include <linux/i2c.h>
29 #include <linux/slab.h>
30 #include <drm/drmP.h>
31 #include <drm/drm_crtc.h>
32 #include <drm/drm_crtc_helper.h>
33 #include <drm/drm_edid.h>
34 #include "intel_drv.h"
35 #include <drm/i915_drm.h>
36 #include "i915_drv.h"
37
38 /* Here's the desired hotplug mode */
39 #define ADPA_HOTPLUG_BITS (ADPA_CRT_HOTPLUG_PERIOD_128 |                \
40                            ADPA_CRT_HOTPLUG_WARMUP_10MS |               \
41                            ADPA_CRT_HOTPLUG_SAMPLE_4S |                 \
42                            ADPA_CRT_HOTPLUG_VOLTAGE_50 |                \
43                            ADPA_CRT_HOTPLUG_VOLREF_325MV |              \
44                            ADPA_CRT_HOTPLUG_ENABLE)
45
46 struct intel_crt {
47         struct intel_encoder base;
48         bool force_hotplug_required;
49         u32 adpa_reg;
50 };
51
52 static struct intel_crt *intel_attached_crt(struct drm_connector *connector)
53 {
54         return container_of(intel_attached_encoder(connector),
55                             struct intel_crt, base);
56 }
57
58 static struct intel_crt *intel_encoder_to_crt(struct intel_encoder *encoder)
59 {
60         return container_of(encoder, struct intel_crt, base);
61 }
62
63 static bool intel_crt_get_hw_state(struct intel_encoder *encoder,
64                                    enum pipe *pipe)
65 {
66         struct drm_device *dev = encoder->base.dev;
67         struct drm_i915_private *dev_priv = dev->dev_private;
68         struct intel_crt *crt = intel_encoder_to_crt(encoder);
69         u32 tmp;
70
71         tmp = I915_READ(crt->adpa_reg);
72
73         if (!(tmp & ADPA_DAC_ENABLE))
74                 return false;
75
76         if (HAS_PCH_CPT(dev))
77                 *pipe = PORT_TO_PIPE_CPT(tmp);
78         else
79                 *pipe = PORT_TO_PIPE(tmp);
80
81         return true;
82 }
83
84 static void intel_disable_crt(struct intel_encoder *encoder)
85 {
86         struct drm_i915_private *dev_priv = encoder->base.dev->dev_private;
87         struct intel_crt *crt = intel_encoder_to_crt(encoder);
88         u32 temp;
89
90         temp = I915_READ(crt->adpa_reg);
91         temp &= ~(ADPA_HSYNC_CNTL_DISABLE | ADPA_VSYNC_CNTL_DISABLE);
92         temp &= ~ADPA_DAC_ENABLE;
93         I915_WRITE(crt->adpa_reg, temp);
94 }
95
96 static void intel_enable_crt(struct intel_encoder *encoder)
97 {
98         struct drm_i915_private *dev_priv = encoder->base.dev->dev_private;
99         struct intel_crt *crt = intel_encoder_to_crt(encoder);
100         u32 temp;
101
102         temp = I915_READ(crt->adpa_reg);
103         temp |= ADPA_DAC_ENABLE;
104         I915_WRITE(crt->adpa_reg, temp);
105 }
106
107 /* Note: The caller is required to filter out dpms modes not supported by the
108  * platform. */
109 static void intel_crt_set_dpms(struct intel_encoder *encoder, int mode)
110 {
111         struct drm_device *dev = encoder->base.dev;
112         struct drm_i915_private *dev_priv = dev->dev_private;
113         struct intel_crt *crt = intel_encoder_to_crt(encoder);
114         u32 temp;
115
116         temp = I915_READ(crt->adpa_reg);
117         temp &= ~(ADPA_HSYNC_CNTL_DISABLE | ADPA_VSYNC_CNTL_DISABLE);
118         temp &= ~ADPA_DAC_ENABLE;
119
120         switch (mode) {
121         case DRM_MODE_DPMS_ON:
122                 temp |= ADPA_DAC_ENABLE;
123                 break;
124         case DRM_MODE_DPMS_STANDBY:
125                 temp |= ADPA_DAC_ENABLE | ADPA_HSYNC_CNTL_DISABLE;
126                 break;
127         case DRM_MODE_DPMS_SUSPEND:
128                 temp |= ADPA_DAC_ENABLE | ADPA_VSYNC_CNTL_DISABLE;
129                 break;
130         case DRM_MODE_DPMS_OFF:
131                 temp |= ADPA_HSYNC_CNTL_DISABLE | ADPA_VSYNC_CNTL_DISABLE;
132                 break;
133         }
134
135         I915_WRITE(crt->adpa_reg, temp);
136 }
137
138 static void intel_crt_dpms(struct drm_connector *connector, int mode)
139 {
140         struct drm_device *dev = connector->dev;
141         struct intel_encoder *encoder = intel_attached_encoder(connector);
142         struct drm_crtc *crtc;
143         int old_dpms;
144
145         /* PCH platforms and VLV only support on/off. */
146         if (INTEL_INFO(dev)->gen >= 5 && mode != DRM_MODE_DPMS_ON)
147                 mode = DRM_MODE_DPMS_OFF;
148
149         if (mode == connector->dpms)
150                 return;
151
152         old_dpms = connector->dpms;
153         connector->dpms = mode;
154
155         /* Only need to change hw state when actually enabled */
156         crtc = encoder->base.crtc;
157         if (!crtc) {
158                 encoder->connectors_active = false;
159                 return;
160         }
161
162         /* We need the pipe to run for anything but OFF. */
163         if (mode == DRM_MODE_DPMS_OFF)
164                 encoder->connectors_active = false;
165         else
166                 encoder->connectors_active = true;
167
168         if (mode < old_dpms) {
169                 /* From off to on, enable the pipe first. */
170                 intel_crtc_update_dpms(crtc);
171
172                 intel_crt_set_dpms(encoder, mode);
173         } else {
174                 intel_crt_set_dpms(encoder, mode);
175
176                 intel_crtc_update_dpms(crtc);
177         }
178
179         intel_modeset_check_state(connector->dev);
180 }
181
182 static int intel_crt_mode_valid(struct drm_connector *connector,
183                                 struct drm_display_mode *mode)
184 {
185         struct drm_device *dev = connector->dev;
186
187         int max_clock = 0;
188         if (mode->flags & DRM_MODE_FLAG_DBLSCAN)
189                 return MODE_NO_DBLESCAN;
190
191         if (mode->clock < 25000)
192                 return MODE_CLOCK_LOW;
193
194         if (IS_GEN2(dev))
195                 max_clock = 350000;
196         else
197                 max_clock = 400000;
198         if (mode->clock > max_clock)
199                 return MODE_CLOCK_HIGH;
200
201         /* The FDI receiver on LPT only supports 8bpc and only has 2 lanes. */
202         if (HAS_PCH_LPT(dev) &&
203             (ironlake_get_lanes_required(mode->clock, 270000, 24) > 2))
204                 return MODE_CLOCK_HIGH;
205
206         return MODE_OK;
207 }
208
209 static bool intel_crt_mode_fixup(struct drm_encoder *encoder,
210                                  const struct drm_display_mode *mode,
211                                  struct drm_display_mode *adjusted_mode)
212 {
213         return true;
214 }
215
216 static void intel_crt_mode_set(struct drm_encoder *encoder,
217                                struct drm_display_mode *mode,
218                                struct drm_display_mode *adjusted_mode)
219 {
220
221         struct drm_device *dev = encoder->dev;
222         struct drm_crtc *crtc = encoder->crtc;
223         struct intel_crt *crt =
224                 intel_encoder_to_crt(to_intel_encoder(encoder));
225         struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
226         struct drm_i915_private *dev_priv = dev->dev_private;
227         u32 adpa;
228
229         if (HAS_PCH_SPLIT(dev))
230                 adpa = ADPA_HOTPLUG_BITS;
231         else
232                 adpa = 0;
233
234         if (adjusted_mode->flags & DRM_MODE_FLAG_PHSYNC)
235                 adpa |= ADPA_HSYNC_ACTIVE_HIGH;
236         if (adjusted_mode->flags & DRM_MODE_FLAG_PVSYNC)
237                 adpa |= ADPA_VSYNC_ACTIVE_HIGH;
238
239         /* For CPT allow 3 pipe config, for others just use A or B */
240         if (HAS_PCH_LPT(dev))
241                 ; /* Those bits don't exist here */
242         else if (HAS_PCH_CPT(dev))
243                 adpa |= PORT_TRANS_SEL_CPT(intel_crtc->pipe);
244         else if (intel_crtc->pipe == 0)
245                 adpa |= ADPA_PIPE_A_SELECT;
246         else
247                 adpa |= ADPA_PIPE_B_SELECT;
248
249         if (!HAS_PCH_SPLIT(dev))
250                 I915_WRITE(BCLRPAT(intel_crtc->pipe), 0);
251
252         I915_WRITE(crt->adpa_reg, adpa);
253 }
254
255 static bool intel_ironlake_crt_detect_hotplug(struct drm_connector *connector)
256 {
257         struct drm_device *dev = connector->dev;
258         struct intel_crt *crt = intel_attached_crt(connector);
259         struct drm_i915_private *dev_priv = dev->dev_private;
260         u32 adpa;
261         bool ret;
262
263         /* The first time through, trigger an explicit detection cycle */
264         if (crt->force_hotplug_required) {
265                 bool turn_off_dac = HAS_PCH_SPLIT(dev);
266                 u32 save_adpa;
267
268                 crt->force_hotplug_required = 0;
269
270                 save_adpa = adpa = I915_READ(PCH_ADPA);
271                 DRM_DEBUG_KMS("trigger hotplug detect cycle: adpa=0x%x\n", adpa);
272
273                 adpa |= ADPA_CRT_HOTPLUG_FORCE_TRIGGER;
274                 if (turn_off_dac)
275                         adpa &= ~ADPA_DAC_ENABLE;
276
277                 I915_WRITE(PCH_ADPA, adpa);
278
279                 if (wait_for((I915_READ(PCH_ADPA) & ADPA_CRT_HOTPLUG_FORCE_TRIGGER) == 0,
280                              1000))
281                         DRM_DEBUG_KMS("timed out waiting for FORCE_TRIGGER");
282
283                 if (turn_off_dac) {
284                         I915_WRITE(PCH_ADPA, save_adpa);
285                         POSTING_READ(PCH_ADPA);
286                 }
287         }
288
289         /* Check the status to see if both blue and green are on now */
290         adpa = I915_READ(PCH_ADPA);
291         if ((adpa & ADPA_CRT_HOTPLUG_MONITOR_MASK) != 0)
292                 ret = true;
293         else
294                 ret = false;
295         DRM_DEBUG_KMS("ironlake hotplug adpa=0x%x, result %d\n", adpa, ret);
296
297         return ret;
298 }
299
300 static bool valleyview_crt_detect_hotplug(struct drm_connector *connector)
301 {
302         struct drm_device *dev = connector->dev;
303         struct drm_i915_private *dev_priv = dev->dev_private;
304         u32 adpa;
305         bool ret;
306         u32 save_adpa;
307
308         save_adpa = adpa = I915_READ(ADPA);
309         DRM_DEBUG_KMS("trigger hotplug detect cycle: adpa=0x%x\n", adpa);
310
311         adpa |= ADPA_CRT_HOTPLUG_FORCE_TRIGGER;
312
313         I915_WRITE(ADPA, adpa);
314
315         if (wait_for((I915_READ(ADPA) & ADPA_CRT_HOTPLUG_FORCE_TRIGGER) == 0,
316                      1000)) {
317                 DRM_DEBUG_KMS("timed out waiting for FORCE_TRIGGER");
318                 I915_WRITE(ADPA, save_adpa);
319         }
320
321         /* Check the status to see if both blue and green are on now */
322         adpa = I915_READ(ADPA);
323         if ((adpa & ADPA_CRT_HOTPLUG_MONITOR_MASK) != 0)
324                 ret = true;
325         else
326                 ret = false;
327
328         DRM_DEBUG_KMS("valleyview hotplug adpa=0x%x, result %d\n", adpa, ret);
329
330         /* FIXME: debug force function and remove */
331         ret = true;
332
333         return ret;
334 }
335
336 /**
337  * Uses CRT_HOTPLUG_EN and CRT_HOTPLUG_STAT to detect CRT presence.
338  *
339  * Not for i915G/i915GM
340  *
341  * \return true if CRT is connected.
342  * \return false if CRT is disconnected.
343  */
344 static bool intel_crt_detect_hotplug(struct drm_connector *connector)
345 {
346         struct drm_device *dev = connector->dev;
347         struct drm_i915_private *dev_priv = dev->dev_private;
348         u32 hotplug_en, orig, stat;
349         bool ret = false;
350         int i, tries = 0;
351
352         if (HAS_PCH_SPLIT(dev))
353                 return intel_ironlake_crt_detect_hotplug(connector);
354
355         if (IS_VALLEYVIEW(dev))
356                 return valleyview_crt_detect_hotplug(connector);
357
358         /*
359          * On 4 series desktop, CRT detect sequence need to be done twice
360          * to get a reliable result.
361          */
362
363         if (IS_G4X(dev) && !IS_GM45(dev))
364                 tries = 2;
365         else
366                 tries = 1;
367         hotplug_en = orig = I915_READ(PORT_HOTPLUG_EN);
368         hotplug_en |= CRT_HOTPLUG_FORCE_DETECT;
369
370         for (i = 0; i < tries ; i++) {
371                 /* turn on the FORCE_DETECT */
372                 I915_WRITE(PORT_HOTPLUG_EN, hotplug_en);
373                 /* wait for FORCE_DETECT to go off */
374                 if (wait_for((I915_READ(PORT_HOTPLUG_EN) &
375                               CRT_HOTPLUG_FORCE_DETECT) == 0,
376                              1000))
377                         DRM_DEBUG_KMS("timed out waiting for FORCE_DETECT to go off");
378         }
379
380         stat = I915_READ(PORT_HOTPLUG_STAT);
381         if ((stat & CRT_HOTPLUG_MONITOR_MASK) != CRT_HOTPLUG_MONITOR_NONE)
382                 ret = true;
383
384         /* clear the interrupt we just generated, if any */
385         I915_WRITE(PORT_HOTPLUG_STAT, CRT_HOTPLUG_INT_STATUS);
386
387         /* and put the bits back */
388         I915_WRITE(PORT_HOTPLUG_EN, orig);
389
390         return ret;
391 }
392
393 static struct edid *intel_crt_get_edid(struct drm_connector *connector,
394                                 struct i2c_adapter *i2c)
395 {
396         struct edid *edid;
397
398         edid = drm_get_edid(connector, i2c);
399
400         if (!edid && !intel_gmbus_is_forced_bit(i2c)) {
401                 DRM_DEBUG_KMS("CRT GMBUS EDID read failed, retry using GPIO bit-banging\n");
402                 intel_gmbus_force_bit(i2c, true);
403                 edid = drm_get_edid(connector, i2c);
404                 intel_gmbus_force_bit(i2c, false);
405         }
406
407         return edid;
408 }
409
410 /* local version of intel_ddc_get_modes() to use intel_crt_get_edid() */
411 static int intel_crt_ddc_get_modes(struct drm_connector *connector,
412                                 struct i2c_adapter *adapter)
413 {
414         struct edid *edid;
415         int ret;
416
417         edid = intel_crt_get_edid(connector, adapter);
418         if (!edid)
419                 return 0;
420
421         ret = intel_connector_update_modes(connector, edid);
422         kfree(edid);
423
424         return ret;
425 }
426
427 static bool intel_crt_detect_ddc(struct drm_connector *connector)
428 {
429         struct intel_crt *crt = intel_attached_crt(connector);
430         struct drm_i915_private *dev_priv = crt->base.base.dev->dev_private;
431         struct edid *edid;
432         struct i2c_adapter *i2c;
433
434         BUG_ON(crt->base.type != INTEL_OUTPUT_ANALOG);
435
436         i2c = intel_gmbus_get_adapter(dev_priv, dev_priv->crt_ddc_pin);
437         edid = intel_crt_get_edid(connector, i2c);
438
439         if (edid) {
440                 bool is_digital = edid->input & DRM_EDID_INPUT_DIGITAL;
441
442                 /*
443                  * This may be a DVI-I connector with a shared DDC
444                  * link between analog and digital outputs, so we
445                  * have to check the EDID input spec of the attached device.
446                  */
447                 if (!is_digital) {
448                         DRM_DEBUG_KMS("CRT detected via DDC:0x50 [EDID]\n");
449                         return true;
450                 }
451
452                 DRM_DEBUG_KMS("CRT not detected via DDC:0x50 [EDID reports a digital panel]\n");
453         } else {
454                 DRM_DEBUG_KMS("CRT not detected via DDC:0x50 [no valid EDID found]\n");
455         }
456
457         kfree(edid);
458
459         return false;
460 }
461
462 static enum drm_connector_status
463 intel_crt_load_detect(struct intel_crt *crt)
464 {
465         struct drm_device *dev = crt->base.base.dev;
466         struct drm_i915_private *dev_priv = dev->dev_private;
467         uint32_t pipe = to_intel_crtc(crt->base.base.crtc)->pipe;
468         uint32_t save_bclrpat;
469         uint32_t save_vtotal;
470         uint32_t vtotal, vactive;
471         uint32_t vsample;
472         uint32_t vblank, vblank_start, vblank_end;
473         uint32_t dsl;
474         uint32_t bclrpat_reg;
475         uint32_t vtotal_reg;
476         uint32_t vblank_reg;
477         uint32_t vsync_reg;
478         uint32_t pipeconf_reg;
479         uint32_t pipe_dsl_reg;
480         uint8_t st00;
481         enum drm_connector_status status;
482
483         DRM_DEBUG_KMS("starting load-detect on CRT\n");
484
485         bclrpat_reg = BCLRPAT(pipe);
486         vtotal_reg = VTOTAL(pipe);
487         vblank_reg = VBLANK(pipe);
488         vsync_reg = VSYNC(pipe);
489         pipeconf_reg = PIPECONF(pipe);
490         pipe_dsl_reg = PIPEDSL(pipe);
491
492         save_bclrpat = I915_READ(bclrpat_reg);
493         save_vtotal = I915_READ(vtotal_reg);
494         vblank = I915_READ(vblank_reg);
495
496         vtotal = ((save_vtotal >> 16) & 0xfff) + 1;
497         vactive = (save_vtotal & 0x7ff) + 1;
498
499         vblank_start = (vblank & 0xfff) + 1;
500         vblank_end = ((vblank >> 16) & 0xfff) + 1;
501
502         /* Set the border color to purple. */
503         I915_WRITE(bclrpat_reg, 0x500050);
504
505         if (!IS_GEN2(dev)) {
506                 uint32_t pipeconf = I915_READ(pipeconf_reg);
507                 I915_WRITE(pipeconf_reg, pipeconf | PIPECONF_FORCE_BORDER);
508                 POSTING_READ(pipeconf_reg);
509                 /* Wait for next Vblank to substitue
510                  * border color for Color info */
511                 intel_wait_for_vblank(dev, pipe);
512                 st00 = I915_READ8(VGA_MSR_WRITE);
513                 status = ((st00 & (1 << 4)) != 0) ?
514                         connector_status_connected :
515                         connector_status_disconnected;
516
517                 I915_WRITE(pipeconf_reg, pipeconf);
518         } else {
519                 bool restore_vblank = false;
520                 int count, detect;
521
522                 /*
523                 * If there isn't any border, add some.
524                 * Yes, this will flicker
525                 */
526                 if (vblank_start <= vactive && vblank_end >= vtotal) {
527                         uint32_t vsync = I915_READ(vsync_reg);
528                         uint32_t vsync_start = (vsync & 0xffff) + 1;
529
530                         vblank_start = vsync_start;
531                         I915_WRITE(vblank_reg,
532                                    (vblank_start - 1) |
533                                    ((vblank_end - 1) << 16));
534                         restore_vblank = true;
535                 }
536                 /* sample in the vertical border, selecting the larger one */
537                 if (vblank_start - vactive >= vtotal - vblank_end)
538                         vsample = (vblank_start + vactive) >> 1;
539                 else
540                         vsample = (vtotal + vblank_end) >> 1;
541
542                 /*
543                  * Wait for the border to be displayed
544                  */
545                 while (I915_READ(pipe_dsl_reg) >= vactive)
546                         ;
547                 while ((dsl = I915_READ(pipe_dsl_reg)) <= vsample)
548                         ;
549                 /*
550                  * Watch ST00 for an entire scanline
551                  */
552                 detect = 0;
553                 count = 0;
554                 do {
555                         count++;
556                         /* Read the ST00 VGA status register */
557                         st00 = I915_READ8(VGA_MSR_WRITE);
558                         if (st00 & (1 << 4))
559                                 detect++;
560                 } while ((I915_READ(pipe_dsl_reg) == dsl));
561
562                 /* restore vblank if necessary */
563                 if (restore_vblank)
564                         I915_WRITE(vblank_reg, vblank);
565                 /*
566                  * If more than 3/4 of the scanline detected a monitor,
567                  * then it is assumed to be present. This works even on i830,
568                  * where there isn't any way to force the border color across
569                  * the screen
570                  */
571                 status = detect * 4 > count * 3 ?
572                          connector_status_connected :
573                          connector_status_disconnected;
574         }
575
576         /* Restore previous settings */
577         I915_WRITE(bclrpat_reg, save_bclrpat);
578
579         return status;
580 }
581
582 static enum drm_connector_status
583 intel_crt_detect(struct drm_connector *connector, bool force)
584 {
585         struct drm_device *dev = connector->dev;
586         struct intel_crt *crt = intel_attached_crt(connector);
587         enum drm_connector_status status;
588         struct intel_load_detect_pipe tmp;
589
590         if (I915_HAS_HOTPLUG(dev)) {
591                 /* We can not rely on the HPD pin always being correctly wired
592                  * up, for example many KVM do not pass it through, and so
593                  * only trust an assertion that the monitor is connected.
594                  */
595                 if (intel_crt_detect_hotplug(connector)) {
596                         DRM_DEBUG_KMS("CRT detected via hotplug\n");
597                         return connector_status_connected;
598                 } else
599                         DRM_DEBUG_KMS("CRT not detected via hotplug\n");
600         }
601
602         if (intel_crt_detect_ddc(connector))
603                 return connector_status_connected;
604
605         /* Load detection is broken on HPD capable machines. Whoever wants a
606          * broken monitor (without edid) to work behind a broken kvm (that fails
607          * to have the right resistors for HP detection) needs to fix this up.
608          * For now just bail out. */
609         if (I915_HAS_HOTPLUG(dev))
610                 return connector_status_disconnected;
611
612         if (!force)
613                 return connector->status;
614
615         /* for pre-945g platforms use load detect */
616         if (intel_get_load_detect_pipe(connector, NULL, &tmp)) {
617                 if (intel_crt_detect_ddc(connector))
618                         status = connector_status_connected;
619                 else
620                         status = intel_crt_load_detect(crt);
621                 intel_release_load_detect_pipe(connector, &tmp);
622         } else
623                 status = connector_status_unknown;
624
625         return status;
626 }
627
628 static void intel_crt_destroy(struct drm_connector *connector)
629 {
630         drm_sysfs_connector_remove(connector);
631         drm_connector_cleanup(connector);
632         kfree(connector);
633 }
634
635 static int intel_crt_get_modes(struct drm_connector *connector)
636 {
637         struct drm_device *dev = connector->dev;
638         struct drm_i915_private *dev_priv = dev->dev_private;
639         int ret;
640         struct i2c_adapter *i2c;
641
642         i2c = intel_gmbus_get_adapter(dev_priv, dev_priv->crt_ddc_pin);
643         ret = intel_crt_ddc_get_modes(connector, i2c);
644         if (ret || !IS_G4X(dev))
645                 return ret;
646
647         /* Try to probe digital port for output in DVI-I -> VGA mode. */
648         i2c = intel_gmbus_get_adapter(dev_priv, GMBUS_PORT_DPB);
649         return intel_crt_ddc_get_modes(connector, i2c);
650 }
651
652 static int intel_crt_set_property(struct drm_connector *connector,
653                                   struct drm_property *property,
654                                   uint64_t value)
655 {
656         return 0;
657 }
658
659 static void intel_crt_reset(struct drm_connector *connector)
660 {
661         struct drm_device *dev = connector->dev;
662         struct drm_i915_private *dev_priv = dev->dev_private;
663         struct intel_crt *crt = intel_attached_crt(connector);
664
665         if (HAS_PCH_SPLIT(dev)) {
666                 u32 adpa;
667
668                 adpa = I915_READ(PCH_ADPA);
669                 adpa &= ~ADPA_CRT_HOTPLUG_MASK;
670                 adpa |= ADPA_HOTPLUG_BITS;
671                 I915_WRITE(PCH_ADPA, adpa);
672                 POSTING_READ(PCH_ADPA);
673
674                 DRM_DEBUG_KMS("pch crt adpa set to 0x%x\n", adpa);
675                 crt->force_hotplug_required = 1;
676         }
677
678 }
679
680 /*
681  * Routines for controlling stuff on the analog port
682  */
683
684 static const struct drm_encoder_helper_funcs crt_encoder_funcs = {
685         .mode_fixup = intel_crt_mode_fixup,
686         .mode_set = intel_crt_mode_set,
687         .disable = intel_encoder_noop,
688 };
689
690 static const struct drm_connector_funcs intel_crt_connector_funcs = {
691         .reset = intel_crt_reset,
692         .dpms = intel_crt_dpms,
693         .detect = intel_crt_detect,
694         .fill_modes = drm_helper_probe_single_connector_modes,
695         .destroy = intel_crt_destroy,
696         .set_property = intel_crt_set_property,
697 };
698
699 static const struct drm_connector_helper_funcs intel_crt_connector_helper_funcs = {
700         .mode_valid = intel_crt_mode_valid,
701         .get_modes = intel_crt_get_modes,
702         .best_encoder = intel_best_encoder,
703 };
704
705 static const struct drm_encoder_funcs intel_crt_enc_funcs = {
706         .destroy = intel_encoder_destroy,
707 };
708
709 static int __init intel_no_crt_dmi_callback(const struct dmi_system_id *id)
710 {
711         DRM_INFO("Skipping CRT initialization for %s\n", id->ident);
712         return 1;
713 }
714
715 static const struct dmi_system_id intel_no_crt[] = {
716         {
717                 .callback = intel_no_crt_dmi_callback,
718                 .ident = "ACER ZGB",
719                 .matches = {
720                         DMI_MATCH(DMI_SYS_VENDOR, "ACER"),
721                         DMI_MATCH(DMI_PRODUCT_NAME, "ZGB"),
722                 },
723         },
724         { }
725 };
726
727 void intel_crt_init(struct drm_device *dev)
728 {
729         struct drm_connector *connector;
730         struct intel_crt *crt;
731         struct intel_connector *intel_connector;
732         struct drm_i915_private *dev_priv = dev->dev_private;
733
734         /* Skip machines without VGA that falsely report hotplug events */
735         if (dmi_check_system(intel_no_crt))
736                 return;
737
738         crt = kzalloc(sizeof(struct intel_crt), GFP_KERNEL);
739         if (!crt)
740                 return;
741
742         intel_connector = kzalloc(sizeof(struct intel_connector), GFP_KERNEL);
743         if (!intel_connector) {
744                 kfree(crt);
745                 return;
746         }
747
748         connector = &intel_connector->base;
749         drm_connector_init(dev, &intel_connector->base,
750                            &intel_crt_connector_funcs, DRM_MODE_CONNECTOR_VGA);
751
752         drm_encoder_init(dev, &crt->base.base, &intel_crt_enc_funcs,
753                          DRM_MODE_ENCODER_DAC);
754
755         intel_connector_attach_encoder(intel_connector, &crt->base);
756
757         crt->base.type = INTEL_OUTPUT_ANALOG;
758         crt->base.cloneable = true;
759         if (IS_I830(dev))
760                 crt->base.crtc_mask = (1 << 0);
761         else
762                 crt->base.crtc_mask = (1 << 0) | (1 << 1) | (1 << 2);
763
764         if (IS_GEN2(dev))
765                 connector->interlace_allowed = 0;
766         else
767                 connector->interlace_allowed = 1;
768         connector->doublescan_allowed = 0;
769
770         if (HAS_PCH_SPLIT(dev))
771                 crt->adpa_reg = PCH_ADPA;
772         else if (IS_VALLEYVIEW(dev))
773                 crt->adpa_reg = VLV_ADPA;
774         else
775                 crt->adpa_reg = ADPA;
776
777         crt->base.disable = intel_disable_crt;
778         crt->base.enable = intel_enable_crt;
779         if (IS_HASWELL(dev))
780                 crt->base.get_hw_state = intel_ddi_get_hw_state;
781         else
782                 crt->base.get_hw_state = intel_crt_get_hw_state;
783         intel_connector->get_hw_state = intel_connector_get_hw_state;
784
785         drm_encoder_helper_add(&crt->base.base, &crt_encoder_funcs);
786         drm_connector_helper_add(connector, &intel_crt_connector_helper_funcs);
787
788         drm_sysfs_connector_add(connector);
789
790         if (I915_HAS_HOTPLUG(dev))
791                 connector->polled = DRM_CONNECTOR_POLL_HPD;
792         else
793                 connector->polled = DRM_CONNECTOR_POLL_CONNECT;
794
795         /*
796          * Configure the automatic hotplug detection stuff
797          */
798         crt->force_hotplug_required = 0;
799
800         dev_priv->hotplug_supported_mask |= CRT_HOTPLUG_INT_STATUS;
801
802         /*
803          * TODO: find a proper way to discover whether we need to set the
804          * polarity reversal bit or not, instead of relying on the BIOS.
805          */
806         if (HAS_PCH_LPT(dev))
807                 dev_priv->fdi_rx_polarity_reversed =
808                      !!(I915_READ(_FDI_RXA_CTL) & FDI_RX_POLARITY_REVERSED_LPT);
809 }