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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/i2c.h>
28#include <linux/slab.h>
29#include "drmP.h"
30#include "drm.h"
31#include "drm_crtc.h"
32#include "drm_crtc_helper.h"
33#include "drm_edid.h"
34#include "intel_drv.h"
35#include "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
46struct intel_crt {
47 struct intel_encoder base;
48 bool force_hotplug_required;
49};
50
51static struct intel_crt *intel_attached_crt(struct drm_connector *connector)
52{
53 return container_of(intel_attached_encoder(connector),
54 struct intel_crt, base);
55}
56
57static void intel_crt_dpms(struct drm_encoder *encoder, int mode)
58{
59 struct drm_device *dev = encoder->dev;
60 struct drm_i915_private *dev_priv = dev->dev_private;
61 u32 temp, reg;
62
63 if (HAS_PCH_SPLIT(dev))
64 reg = PCH_ADPA;
65 else
66 reg = ADPA;
67
68 temp = I915_READ(reg);
69 temp &= ~(ADPA_HSYNC_CNTL_DISABLE | ADPA_VSYNC_CNTL_DISABLE);
70 temp &= ~ADPA_DAC_ENABLE;
71
72 switch(mode) {
73 case DRM_MODE_DPMS_ON:
74 temp |= ADPA_DAC_ENABLE;
75 break;
76 case DRM_MODE_DPMS_STANDBY:
77 temp |= ADPA_DAC_ENABLE | ADPA_HSYNC_CNTL_DISABLE;
78 break;
79 case DRM_MODE_DPMS_SUSPEND:
80 temp |= ADPA_DAC_ENABLE | ADPA_VSYNC_CNTL_DISABLE;
81 break;
82 case DRM_MODE_DPMS_OFF:
83 temp |= ADPA_HSYNC_CNTL_DISABLE | ADPA_VSYNC_CNTL_DISABLE;
84 break;
85 }
86
87 I915_WRITE(reg, temp);
88}
89
90static int intel_crt_mode_valid(struct drm_connector *connector,
91 struct drm_display_mode *mode)
92{
93 struct drm_device *dev = connector->dev;
94
95 int max_clock = 0;
96 if (mode->flags & DRM_MODE_FLAG_DBLSCAN)
97 return MODE_NO_DBLESCAN;
98
99 if (mode->clock < 25000)
100 return MODE_CLOCK_LOW;
101
102 if (IS_GEN2(dev))
103 max_clock = 350000;
104 else
105 max_clock = 400000;
106 if (mode->clock > max_clock)
107 return MODE_CLOCK_HIGH;
108
109 return MODE_OK;
110}
111
112static bool intel_crt_mode_fixup(struct drm_encoder *encoder,
113 struct drm_display_mode *mode,
114 struct drm_display_mode *adjusted_mode)
115{
116 return true;
117}
118
119static void intel_crt_mode_set(struct drm_encoder *encoder,
120 struct drm_display_mode *mode,
121 struct drm_display_mode *adjusted_mode)
122{
123
124 struct drm_device *dev = encoder->dev;
125 struct drm_crtc *crtc = encoder->crtc;
126 struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
127 struct drm_i915_private *dev_priv = dev->dev_private;
128 int dpll_md_reg;
129 u32 adpa, dpll_md;
130 u32 adpa_reg;
131
132 dpll_md_reg = DPLL_MD(intel_crtc->pipe);
133
134 if (HAS_PCH_SPLIT(dev))
135 adpa_reg = PCH_ADPA;
136 else
137 adpa_reg = ADPA;
138
139 /*
140 * Disable separate mode multiplier used when cloning SDVO to CRT
141 * XXX this needs to be adjusted when we really are cloning
142 */
143 if (INTEL_INFO(dev)->gen >= 4 && !HAS_PCH_SPLIT(dev)) {
144 dpll_md = I915_READ(dpll_md_reg);
145 I915_WRITE(dpll_md_reg,
146 dpll_md & ~DPLL_MD_UDI_MULTIPLIER_MASK);
147 }
148
149 adpa = ADPA_HOTPLUG_BITS;
150 if (adjusted_mode->flags & DRM_MODE_FLAG_PHSYNC)
151 adpa |= ADPA_HSYNC_ACTIVE_HIGH;
152 if (adjusted_mode->flags & DRM_MODE_FLAG_PVSYNC)
153 adpa |= ADPA_VSYNC_ACTIVE_HIGH;
154
155 if (intel_crtc->pipe == 0) {
156 if (HAS_PCH_CPT(dev))
157 adpa |= PORT_TRANS_A_SEL_CPT;
158 else
159 adpa |= ADPA_PIPE_A_SELECT;
160 } else {
161 if (HAS_PCH_CPT(dev))
162 adpa |= PORT_TRANS_B_SEL_CPT;
163 else
164 adpa |= ADPA_PIPE_B_SELECT;
165 }
166
167 if (!HAS_PCH_SPLIT(dev))
168 I915_WRITE(BCLRPAT(intel_crtc->pipe), 0);
169
170 I915_WRITE(adpa_reg, adpa);
171}
172
173static bool intel_ironlake_crt_detect_hotplug(struct drm_connector *connector)
174{
175 struct drm_device *dev = connector->dev;
176 struct intel_crt *crt = intel_attached_crt(connector);
177 struct drm_i915_private *dev_priv = dev->dev_private;
178 u32 adpa;
179 bool ret;
180
181 /* The first time through, trigger an explicit detection cycle */
182 if (crt->force_hotplug_required) {
183 bool turn_off_dac = HAS_PCH_SPLIT(dev);
184 u32 save_adpa;
185
186 crt->force_hotplug_required = 0;
187
188 save_adpa = adpa = I915_READ(PCH_ADPA);
189 DRM_DEBUG_KMS("trigger hotplug detect cycle: adpa=0x%x\n", adpa);
190
191 adpa |= ADPA_CRT_HOTPLUG_FORCE_TRIGGER;
192 if (turn_off_dac)
193 adpa &= ~ADPA_DAC_ENABLE;
194
195 I915_WRITE(PCH_ADPA, adpa);
196
197 if (wait_for((I915_READ(PCH_ADPA) & ADPA_CRT_HOTPLUG_FORCE_TRIGGER) == 0,
198 1000))
199 DRM_DEBUG_KMS("timed out waiting for FORCE_TRIGGER");
200
201 if (turn_off_dac) {
202 I915_WRITE(PCH_ADPA, save_adpa);
203 POSTING_READ(PCH_ADPA);
204 }
205 }
206
207 /* Check the status to see if both blue and green are on now */
208 adpa = I915_READ(PCH_ADPA);
209 if ((adpa & ADPA_CRT_HOTPLUG_MONITOR_MASK) != 0)
210 ret = true;
211 else
212 ret = false;
213 DRM_DEBUG_KMS("ironlake hotplug adpa=0x%x, result %d\n", adpa, ret);
214
215 return ret;
216}
217
218/**
219 * Uses CRT_HOTPLUG_EN and CRT_HOTPLUG_STAT to detect CRT presence.
220 *
221 * Not for i915G/i915GM
222 *
223 * \return true if CRT is connected.
224 * \return false if CRT is disconnected.
225 */
226static bool intel_crt_detect_hotplug(struct drm_connector *connector)
227{
228 struct drm_device *dev = connector->dev;
229 struct drm_i915_private *dev_priv = dev->dev_private;
230 u32 hotplug_en, orig, stat;
231 bool ret = false;
232 int i, tries = 0;
233
234 if (HAS_PCH_SPLIT(dev))
235 return intel_ironlake_crt_detect_hotplug(connector);
236
237 /*
238 * On 4 series desktop, CRT detect sequence need to be done twice
239 * to get a reliable result.
240 */
241
242 if (IS_G4X(dev) && !IS_GM45(dev))
243 tries = 2;
244 else
245 tries = 1;
246 hotplug_en = orig = I915_READ(PORT_HOTPLUG_EN);
247 hotplug_en |= CRT_HOTPLUG_FORCE_DETECT;
248
249 for (i = 0; i < tries ; i++) {
250 /* turn on the FORCE_DETECT */
251 I915_WRITE(PORT_HOTPLUG_EN, hotplug_en);
252 /* wait for FORCE_DETECT to go off */
253 if (wait_for((I915_READ(PORT_HOTPLUG_EN) &
254 CRT_HOTPLUG_FORCE_DETECT) == 0,
255 1000))
256 DRM_DEBUG_KMS("timed out waiting for FORCE_DETECT to go off");
257 }
258
259 stat = I915_READ(PORT_HOTPLUG_STAT);
260 if ((stat & CRT_HOTPLUG_MONITOR_MASK) != CRT_HOTPLUG_MONITOR_NONE)
261 ret = true;
262
263 /* clear the interrupt we just generated, if any */
264 I915_WRITE(PORT_HOTPLUG_STAT, CRT_HOTPLUG_INT_STATUS);
265
266 /* and put the bits back */
267 I915_WRITE(PORT_HOTPLUG_EN, orig);
268
269 return ret;
270}
271
272static bool intel_crt_detect_ddc(struct drm_connector *connector)
273{
274 struct intel_crt *crt = intel_attached_crt(connector);
275 struct drm_i915_private *dev_priv = crt->base.base.dev->dev_private;
276
277 /* CRT should always be at 0, but check anyway */
278 if (crt->base.type != INTEL_OUTPUT_ANALOG)
279 return false;
280
281 if (intel_ddc_probe(&crt->base, dev_priv->crt_ddc_pin)) {
282 struct edid *edid;
283 bool is_digital = false;
284
285 edid = drm_get_edid(connector,
286 &dev_priv->gmbus[dev_priv->crt_ddc_pin].adapter);
287 /*
288 * This may be a DVI-I connector with a shared DDC
289 * link between analog and digital outputs, so we
290 * have to check the EDID input spec of the attached device.
291 *
292 * On the other hand, what should we do if it is a broken EDID?
293 */
294 if (edid != NULL) {
295 is_digital = edid->input & DRM_EDID_INPUT_DIGITAL;
296 connector->display_info.raw_edid = NULL;
297 kfree(edid);
298 }
299
300 if (!is_digital) {
301 DRM_DEBUG_KMS("CRT detected via DDC:0x50 [EDID]\n");
302 return true;
303 } else {
304 DRM_DEBUG_KMS("CRT not detected via DDC:0x50 [EDID reports a digital panel]\n");
305 }
306 }
307
308 return false;
309}
310
311static enum drm_connector_status
312intel_crt_load_detect(struct intel_crt *crt)
313{
314 struct drm_device *dev = crt->base.base.dev;
315 struct drm_i915_private *dev_priv = dev->dev_private;
316 uint32_t pipe = to_intel_crtc(crt->base.base.crtc)->pipe;
317 uint32_t save_bclrpat;
318 uint32_t save_vtotal;
319 uint32_t vtotal, vactive;
320 uint32_t vsample;
321 uint32_t vblank, vblank_start, vblank_end;
322 uint32_t dsl;
323 uint32_t bclrpat_reg;
324 uint32_t vtotal_reg;
325 uint32_t vblank_reg;
326 uint32_t vsync_reg;
327 uint32_t pipeconf_reg;
328 uint32_t pipe_dsl_reg;
329 uint8_t st00;
330 enum drm_connector_status status;
331
332 DRM_DEBUG_KMS("starting load-detect on CRT\n");
333
334 bclrpat_reg = BCLRPAT(pipe);
335 vtotal_reg = VTOTAL(pipe);
336 vblank_reg = VBLANK(pipe);
337 vsync_reg = VSYNC(pipe);
338 pipeconf_reg = PIPECONF(pipe);
339 pipe_dsl_reg = PIPEDSL(pipe);
340
341 save_bclrpat = I915_READ(bclrpat_reg);
342 save_vtotal = I915_READ(vtotal_reg);
343 vblank = I915_READ(vblank_reg);
344
345 vtotal = ((save_vtotal >> 16) & 0xfff) + 1;
346 vactive = (save_vtotal & 0x7ff) + 1;
347
348 vblank_start = (vblank & 0xfff) + 1;
349 vblank_end = ((vblank >> 16) & 0xfff) + 1;
350
351 /* Set the border color to purple. */
352 I915_WRITE(bclrpat_reg, 0x500050);
353
354 if (!IS_GEN2(dev)) {
355 uint32_t pipeconf = I915_READ(pipeconf_reg);
356 I915_WRITE(pipeconf_reg, pipeconf | PIPECONF_FORCE_BORDER);
357 POSTING_READ(pipeconf_reg);
358 /* Wait for next Vblank to substitue
359 * border color for Color info */
360 intel_wait_for_vblank(dev, pipe);
361 st00 = I915_READ8(VGA_MSR_WRITE);
362 status = ((st00 & (1 << 4)) != 0) ?
363 connector_status_connected :
364 connector_status_disconnected;
365
366 I915_WRITE(pipeconf_reg, pipeconf);
367 } else {
368 bool restore_vblank = false;
369 int count, detect;
370
371 /*
372 * If there isn't any border, add some.
373 * Yes, this will flicker
374 */
375 if (vblank_start <= vactive && vblank_end >= vtotal) {
376 uint32_t vsync = I915_READ(vsync_reg);
377 uint32_t vsync_start = (vsync & 0xffff) + 1;
378
379 vblank_start = vsync_start;
380 I915_WRITE(vblank_reg,
381 (vblank_start - 1) |
382 ((vblank_end - 1) << 16));
383 restore_vblank = true;
384 }
385 /* sample in the vertical border, selecting the larger one */
386 if (vblank_start - vactive >= vtotal - vblank_end)
387 vsample = (vblank_start + vactive) >> 1;
388 else
389 vsample = (vtotal + vblank_end) >> 1;
390
391 /*
392 * Wait for the border to be displayed
393 */
394 while (I915_READ(pipe_dsl_reg) >= vactive)
395 ;
396 while ((dsl = I915_READ(pipe_dsl_reg)) <= vsample)
397 ;
398 /*
399 * Watch ST00 for an entire scanline
400 */
401 detect = 0;
402 count = 0;
403 do {
404 count++;
405 /* Read the ST00 VGA status register */
406 st00 = I915_READ8(VGA_MSR_WRITE);
407 if (st00 & (1 << 4))
408 detect++;
409 } while ((I915_READ(pipe_dsl_reg) == dsl));
410
411 /* restore vblank if necessary */
412 if (restore_vblank)
413 I915_WRITE(vblank_reg, vblank);
414 /*
415 * If more than 3/4 of the scanline detected a monitor,
416 * then it is assumed to be present. This works even on i830,
417 * where there isn't any way to force the border color across
418 * the screen
419 */
420 status = detect * 4 > count * 3 ?
421 connector_status_connected :
422 connector_status_disconnected;
423 }
424
425 /* Restore previous settings */
426 I915_WRITE(bclrpat_reg, save_bclrpat);
427
428 return status;
429}
430
431static enum drm_connector_status
432intel_crt_detect(struct drm_connector *connector, bool force)
433{
434 struct drm_device *dev = connector->dev;
435 struct intel_crt *crt = intel_attached_crt(connector);
436 struct drm_crtc *crtc;
437 enum drm_connector_status status;
438
439 if (I915_HAS_HOTPLUG(dev)) {
440 if (intel_crt_detect_hotplug(connector)) {
441 DRM_DEBUG_KMS("CRT detected via hotplug\n");
442 return connector_status_connected;
443 } else {
444 DRM_DEBUG_KMS("CRT not detected via hotplug\n");
445 return connector_status_disconnected;
446 }
447 }
448
449 if (intel_crt_detect_ddc(connector))
450 return connector_status_connected;
451
452 if (!force)
453 return connector->status;
454
455 /* for pre-945g platforms use load detect */
456 crtc = crt->base.base.crtc;
457 if (crtc && crtc->enabled) {
458 status = intel_crt_load_detect(crt);
459 } else {
460 struct intel_load_detect_pipe tmp;
461
462 if (intel_get_load_detect_pipe(&crt->base, connector, NULL,
463 &tmp)) {
464 if (intel_crt_detect_ddc(connector))
465 status = connector_status_connected;
466 else
467 status = intel_crt_load_detect(crt);
468 intel_release_load_detect_pipe(&crt->base, connector,
469 &tmp);
470 } else
471 status = connector_status_unknown;
472 }
473
474 return status;
475}
476
477static void intel_crt_destroy(struct drm_connector *connector)
478{
479 drm_sysfs_connector_remove(connector);
480 drm_connector_cleanup(connector);
481 kfree(connector);
482}
483
484static int intel_crt_get_modes(struct drm_connector *connector)
485{
486 struct drm_device *dev = connector->dev;
487 struct drm_i915_private *dev_priv = dev->dev_private;
488 int ret;
489
490 ret = intel_ddc_get_modes(connector,
491 &dev_priv->gmbus[dev_priv->crt_ddc_pin].adapter);
492 if (ret || !IS_G4X(dev))
493 return ret;
494
495 /* Try to probe digital port for output in DVI-I -> VGA mode. */
496 return intel_ddc_get_modes(connector,
497 &dev_priv->gmbus[GMBUS_PORT_DPB].adapter);
498}
499
500static int intel_crt_set_property(struct drm_connector *connector,
501 struct drm_property *property,
502 uint64_t value)
503{
504 return 0;
505}
506
507static void intel_crt_reset(struct drm_connector *connector)
508{
509 struct drm_device *dev = connector->dev;
510 struct intel_crt *crt = intel_attached_crt(connector);
511
512 if (HAS_PCH_SPLIT(dev))
513 crt->force_hotplug_required = 1;
514}
515
516/*
517 * Routines for controlling stuff on the analog port
518 */
519
520static const struct drm_encoder_helper_funcs intel_crt_helper_funcs = {
521 .dpms = intel_crt_dpms,
522 .mode_fixup = intel_crt_mode_fixup,
523 .prepare = intel_encoder_prepare,
524 .commit = intel_encoder_commit,
525 .mode_set = intel_crt_mode_set,
526};
527
528static const struct drm_connector_funcs intel_crt_connector_funcs = {
529 .reset = intel_crt_reset,
530 .dpms = drm_helper_connector_dpms,
531 .detect = intel_crt_detect,
532 .fill_modes = drm_helper_probe_single_connector_modes,
533 .destroy = intel_crt_destroy,
534 .set_property = intel_crt_set_property,
535};
536
537static const struct drm_connector_helper_funcs intel_crt_connector_helper_funcs = {
538 .mode_valid = intel_crt_mode_valid,
539 .get_modes = intel_crt_get_modes,
540 .best_encoder = intel_best_encoder,
541};
542
543static const struct drm_encoder_funcs intel_crt_enc_funcs = {
544 .destroy = intel_encoder_destroy,
545};
546
547void intel_crt_init(struct drm_device *dev)
548{
549 struct drm_connector *connector;
550 struct intel_crt *crt;
551 struct intel_connector *intel_connector;
552 struct drm_i915_private *dev_priv = dev->dev_private;
553
554 crt = kzalloc(sizeof(struct intel_crt), GFP_KERNEL);
555 if (!crt)
556 return;
557
558 intel_connector = kzalloc(sizeof(struct intel_connector), GFP_KERNEL);
559 if (!intel_connector) {
560 kfree(crt);
561 return;
562 }
563
564 connector = &intel_connector->base;
565 drm_connector_init(dev, &intel_connector->base,
566 &intel_crt_connector_funcs, DRM_MODE_CONNECTOR_VGA);
567
568 drm_encoder_init(dev, &crt->base.base, &intel_crt_enc_funcs,
569 DRM_MODE_ENCODER_DAC);
570
571 intel_connector_attach_encoder(intel_connector, &crt->base);
572
573 crt->base.type = INTEL_OUTPUT_ANALOG;
574 crt->base.clone_mask = (1 << INTEL_SDVO_NON_TV_CLONE_BIT |
575 1 << INTEL_ANALOG_CLONE_BIT |
576 1 << INTEL_SDVO_LVDS_CLONE_BIT);
577 crt->base.crtc_mask = (1 << 0) | (1 << 1);
578 connector->interlace_allowed = 1;
579 connector->doublescan_allowed = 0;
580
581 drm_encoder_helper_add(&crt->base.base, &intel_crt_helper_funcs);
582 drm_connector_helper_add(connector, &intel_crt_connector_helper_funcs);
583
584 drm_sysfs_connector_add(connector);
585
586 if (I915_HAS_HOTPLUG(dev))
587 connector->polled = DRM_CONNECTOR_POLL_HPD;
588 else
589 connector->polled = DRM_CONNECTOR_POLL_CONNECT;
590
591 /*
592 * Configure the automatic hotplug detection stuff
593 */
594 crt->force_hotplug_required = 0;
595 if (HAS_PCH_SPLIT(dev)) {
596 u32 adpa;
597
598 adpa = I915_READ(PCH_ADPA);
599 adpa &= ~ADPA_CRT_HOTPLUG_MASK;
600 adpa |= ADPA_HOTPLUG_BITS;
601 I915_WRITE(PCH_ADPA, adpa);
602 POSTING_READ(PCH_ADPA);
603
604 DRM_DEBUG_KMS("pch crt adpa set to 0x%x\n", adpa);
605 crt->force_hotplug_required = 1;
606 }
607
608 dev_priv->hotplug_supported_mask |= CRT_HOTPLUG_INT_STATUS;
609}
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_atomic_helper.h>
32#include <drm/drm_crtc.h>
33#include <drm/drm_crtc_helper.h>
34#include <drm/drm_edid.h>
35#include "intel_drv.h"
36#include <drm/i915_drm.h>
37#include "i915_drv.h"
38
39/* Here's the desired hotplug mode */
40#define ADPA_HOTPLUG_BITS (ADPA_CRT_HOTPLUG_PERIOD_128 | \
41 ADPA_CRT_HOTPLUG_WARMUP_10MS | \
42 ADPA_CRT_HOTPLUG_SAMPLE_4S | \
43 ADPA_CRT_HOTPLUG_VOLTAGE_50 | \
44 ADPA_CRT_HOTPLUG_VOLREF_325MV | \
45 ADPA_CRT_HOTPLUG_ENABLE)
46
47struct intel_crt {
48 struct intel_encoder base;
49 /* DPMS state is stored in the connector, which we need in the
50 * encoder's enable/disable callbacks */
51 struct intel_connector *connector;
52 bool force_hotplug_required;
53 i915_reg_t adpa_reg;
54};
55
56static struct intel_crt *intel_encoder_to_crt(struct intel_encoder *encoder)
57{
58 return container_of(encoder, struct intel_crt, base);
59}
60
61static struct intel_crt *intel_attached_crt(struct drm_connector *connector)
62{
63 return intel_encoder_to_crt(intel_attached_encoder(connector));
64}
65
66static bool intel_crt_get_hw_state(struct intel_encoder *encoder,
67 enum pipe *pipe)
68{
69 struct drm_device *dev = encoder->base.dev;
70 struct drm_i915_private *dev_priv = to_i915(dev);
71 struct intel_crt *crt = intel_encoder_to_crt(encoder);
72 u32 tmp;
73 bool ret;
74
75 if (!intel_display_power_get_if_enabled(dev_priv,
76 encoder->power_domain))
77 return false;
78
79 ret = false;
80
81 tmp = I915_READ(crt->adpa_reg);
82
83 if (!(tmp & ADPA_DAC_ENABLE))
84 goto out;
85
86 if (HAS_PCH_CPT(dev_priv))
87 *pipe = PORT_TO_PIPE_CPT(tmp);
88 else
89 *pipe = PORT_TO_PIPE(tmp);
90
91 ret = true;
92out:
93 intel_display_power_put(dev_priv, encoder->power_domain);
94
95 return ret;
96}
97
98static unsigned int intel_crt_get_flags(struct intel_encoder *encoder)
99{
100 struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
101 struct intel_crt *crt = intel_encoder_to_crt(encoder);
102 u32 tmp, flags = 0;
103
104 tmp = I915_READ(crt->adpa_reg);
105
106 if (tmp & ADPA_HSYNC_ACTIVE_HIGH)
107 flags |= DRM_MODE_FLAG_PHSYNC;
108 else
109 flags |= DRM_MODE_FLAG_NHSYNC;
110
111 if (tmp & ADPA_VSYNC_ACTIVE_HIGH)
112 flags |= DRM_MODE_FLAG_PVSYNC;
113 else
114 flags |= DRM_MODE_FLAG_NVSYNC;
115
116 return flags;
117}
118
119static void intel_crt_get_config(struct intel_encoder *encoder,
120 struct intel_crtc_state *pipe_config)
121{
122 pipe_config->output_types |= BIT(INTEL_OUTPUT_ANALOG);
123
124 pipe_config->base.adjusted_mode.flags |= intel_crt_get_flags(encoder);
125
126 pipe_config->base.adjusted_mode.crtc_clock = pipe_config->port_clock;
127}
128
129static void hsw_crt_get_config(struct intel_encoder *encoder,
130 struct intel_crtc_state *pipe_config)
131{
132 struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
133
134 intel_ddi_get_config(encoder, pipe_config);
135
136 pipe_config->base.adjusted_mode.flags &= ~(DRM_MODE_FLAG_PHSYNC |
137 DRM_MODE_FLAG_NHSYNC |
138 DRM_MODE_FLAG_PVSYNC |
139 DRM_MODE_FLAG_NVSYNC);
140 pipe_config->base.adjusted_mode.flags |= intel_crt_get_flags(encoder);
141
142 pipe_config->base.adjusted_mode.crtc_clock = lpt_get_iclkip(dev_priv);
143}
144
145/* Note: The caller is required to filter out dpms modes not supported by the
146 * platform. */
147static void intel_crt_set_dpms(struct intel_encoder *encoder,
148 const struct intel_crtc_state *crtc_state,
149 int mode)
150{
151 struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
152 struct intel_crt *crt = intel_encoder_to_crt(encoder);
153 struct intel_crtc *crtc = to_intel_crtc(crtc_state->base.crtc);
154 const struct drm_display_mode *adjusted_mode = &crtc_state->base.adjusted_mode;
155 u32 adpa;
156
157 if (INTEL_GEN(dev_priv) >= 5)
158 adpa = ADPA_HOTPLUG_BITS;
159 else
160 adpa = 0;
161
162 if (adjusted_mode->flags & DRM_MODE_FLAG_PHSYNC)
163 adpa |= ADPA_HSYNC_ACTIVE_HIGH;
164 if (adjusted_mode->flags & DRM_MODE_FLAG_PVSYNC)
165 adpa |= ADPA_VSYNC_ACTIVE_HIGH;
166
167 /* For CPT allow 3 pipe config, for others just use A or B */
168 if (HAS_PCH_LPT(dev_priv))
169 ; /* Those bits don't exist here */
170 else if (HAS_PCH_CPT(dev_priv))
171 adpa |= PORT_TRANS_SEL_CPT(crtc->pipe);
172 else if (crtc->pipe == 0)
173 adpa |= ADPA_PIPE_A_SELECT;
174 else
175 adpa |= ADPA_PIPE_B_SELECT;
176
177 if (!HAS_PCH_SPLIT(dev_priv))
178 I915_WRITE(BCLRPAT(crtc->pipe), 0);
179
180 switch (mode) {
181 case DRM_MODE_DPMS_ON:
182 adpa |= ADPA_DAC_ENABLE;
183 break;
184 case DRM_MODE_DPMS_STANDBY:
185 adpa |= ADPA_DAC_ENABLE | ADPA_HSYNC_CNTL_DISABLE;
186 break;
187 case DRM_MODE_DPMS_SUSPEND:
188 adpa |= ADPA_DAC_ENABLE | ADPA_VSYNC_CNTL_DISABLE;
189 break;
190 case DRM_MODE_DPMS_OFF:
191 adpa |= ADPA_HSYNC_CNTL_DISABLE | ADPA_VSYNC_CNTL_DISABLE;
192 break;
193 }
194
195 I915_WRITE(crt->adpa_reg, adpa);
196}
197
198static void intel_disable_crt(struct intel_encoder *encoder,
199 const struct intel_crtc_state *old_crtc_state,
200 const struct drm_connector_state *old_conn_state)
201{
202 intel_crt_set_dpms(encoder, old_crtc_state, DRM_MODE_DPMS_OFF);
203}
204
205static void pch_disable_crt(struct intel_encoder *encoder,
206 const struct intel_crtc_state *old_crtc_state,
207 const struct drm_connector_state *old_conn_state)
208{
209}
210
211static void pch_post_disable_crt(struct intel_encoder *encoder,
212 const struct intel_crtc_state *old_crtc_state,
213 const struct drm_connector_state *old_conn_state)
214{
215 intel_disable_crt(encoder, old_crtc_state, old_conn_state);
216}
217
218static void hsw_disable_crt(struct intel_encoder *encoder,
219 const struct intel_crtc_state *old_crtc_state,
220 const struct drm_connector_state *old_conn_state)
221{
222 struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
223
224 WARN_ON(!old_crtc_state->has_pch_encoder);
225
226 intel_set_pch_fifo_underrun_reporting(dev_priv, PIPE_A, false);
227}
228
229static void hsw_post_disable_crt(struct intel_encoder *encoder,
230 const struct intel_crtc_state *old_crtc_state,
231 const struct drm_connector_state *old_conn_state)
232{
233 struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
234
235 pch_post_disable_crt(encoder, old_crtc_state, old_conn_state);
236
237 lpt_disable_pch_transcoder(dev_priv);
238 lpt_disable_iclkip(dev_priv);
239
240 intel_ddi_fdi_post_disable(encoder, old_crtc_state, old_conn_state);
241
242 WARN_ON(!old_crtc_state->has_pch_encoder);
243
244 intel_set_pch_fifo_underrun_reporting(dev_priv, PIPE_A, true);
245}
246
247static void hsw_pre_pll_enable_crt(struct intel_encoder *encoder,
248 const struct intel_crtc_state *crtc_state,
249 const struct drm_connector_state *conn_state)
250{
251 struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
252
253 WARN_ON(!crtc_state->has_pch_encoder);
254
255 intel_set_pch_fifo_underrun_reporting(dev_priv, PIPE_A, false);
256}
257
258static void hsw_pre_enable_crt(struct intel_encoder *encoder,
259 const struct intel_crtc_state *crtc_state,
260 const struct drm_connector_state *conn_state)
261{
262 struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
263 struct intel_crtc *crtc = to_intel_crtc(crtc_state->base.crtc);
264 enum pipe pipe = crtc->pipe;
265
266 WARN_ON(!crtc_state->has_pch_encoder);
267
268 intel_set_cpu_fifo_underrun_reporting(dev_priv, pipe, false);
269
270 dev_priv->display.fdi_link_train(crtc, crtc_state);
271}
272
273static void hsw_enable_crt(struct intel_encoder *encoder,
274 const struct intel_crtc_state *crtc_state,
275 const struct drm_connector_state *conn_state)
276{
277 struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
278 struct intel_crtc *crtc = to_intel_crtc(crtc_state->base.crtc);
279 enum pipe pipe = crtc->pipe;
280
281 WARN_ON(!crtc_state->has_pch_encoder);
282
283 intel_crt_set_dpms(encoder, crtc_state, DRM_MODE_DPMS_ON);
284
285 intel_wait_for_vblank(dev_priv, pipe);
286 intel_wait_for_vblank(dev_priv, pipe);
287 intel_set_cpu_fifo_underrun_reporting(dev_priv, pipe, true);
288 intel_set_pch_fifo_underrun_reporting(dev_priv, PIPE_A, true);
289}
290
291static void intel_enable_crt(struct intel_encoder *encoder,
292 const struct intel_crtc_state *crtc_state,
293 const struct drm_connector_state *conn_state)
294{
295 intel_crt_set_dpms(encoder, crtc_state, DRM_MODE_DPMS_ON);
296}
297
298static enum drm_mode_status
299intel_crt_mode_valid(struct drm_connector *connector,
300 struct drm_display_mode *mode)
301{
302 struct drm_device *dev = connector->dev;
303 struct drm_i915_private *dev_priv = to_i915(dev);
304 int max_dotclk = dev_priv->max_dotclk_freq;
305 int max_clock;
306
307 if (mode->clock < 25000)
308 return MODE_CLOCK_LOW;
309
310 if (HAS_PCH_LPT(dev_priv))
311 max_clock = 180000;
312 else if (IS_VALLEYVIEW(dev_priv))
313 /*
314 * 270 MHz due to current DPLL limits,
315 * DAC limit supposedly 355 MHz.
316 */
317 max_clock = 270000;
318 else if (IS_GEN3(dev_priv) || IS_GEN4(dev_priv))
319 max_clock = 400000;
320 else
321 max_clock = 350000;
322 if (mode->clock > max_clock)
323 return MODE_CLOCK_HIGH;
324
325 if (mode->clock > max_dotclk)
326 return MODE_CLOCK_HIGH;
327
328 /* The FDI receiver on LPT only supports 8bpc and only has 2 lanes. */
329 if (HAS_PCH_LPT(dev_priv) &&
330 (ironlake_get_lanes_required(mode->clock, 270000, 24) > 2))
331 return MODE_CLOCK_HIGH;
332
333 return MODE_OK;
334}
335
336static bool intel_crt_compute_config(struct intel_encoder *encoder,
337 struct intel_crtc_state *pipe_config,
338 struct drm_connector_state *conn_state)
339{
340 return true;
341}
342
343static bool pch_crt_compute_config(struct intel_encoder *encoder,
344 struct intel_crtc_state *pipe_config,
345 struct drm_connector_state *conn_state)
346{
347 pipe_config->has_pch_encoder = true;
348
349 return true;
350}
351
352static bool hsw_crt_compute_config(struct intel_encoder *encoder,
353 struct intel_crtc_state *pipe_config,
354 struct drm_connector_state *conn_state)
355{
356 struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
357
358 pipe_config->has_pch_encoder = true;
359
360 /* LPT FDI RX only supports 8bpc. */
361 if (HAS_PCH_LPT(dev_priv)) {
362 if (pipe_config->bw_constrained && pipe_config->pipe_bpp < 24) {
363 DRM_DEBUG_KMS("LPT only supports 24bpp\n");
364 return false;
365 }
366
367 pipe_config->pipe_bpp = 24;
368 }
369
370 /* FDI must always be 2.7 GHz */
371 pipe_config->port_clock = 135000 * 2;
372
373 return true;
374}
375
376static bool intel_ironlake_crt_detect_hotplug(struct drm_connector *connector)
377{
378 struct drm_device *dev = connector->dev;
379 struct intel_crt *crt = intel_attached_crt(connector);
380 struct drm_i915_private *dev_priv = to_i915(dev);
381 u32 adpa;
382 bool ret;
383
384 /* The first time through, trigger an explicit detection cycle */
385 if (crt->force_hotplug_required) {
386 bool turn_off_dac = HAS_PCH_SPLIT(dev_priv);
387 u32 save_adpa;
388
389 crt->force_hotplug_required = 0;
390
391 save_adpa = adpa = I915_READ(crt->adpa_reg);
392 DRM_DEBUG_KMS("trigger hotplug detect cycle: adpa=0x%x\n", adpa);
393
394 adpa |= ADPA_CRT_HOTPLUG_FORCE_TRIGGER;
395 if (turn_off_dac)
396 adpa &= ~ADPA_DAC_ENABLE;
397
398 I915_WRITE(crt->adpa_reg, adpa);
399
400 if (intel_wait_for_register(dev_priv,
401 crt->adpa_reg,
402 ADPA_CRT_HOTPLUG_FORCE_TRIGGER, 0,
403 1000))
404 DRM_DEBUG_KMS("timed out waiting for FORCE_TRIGGER");
405
406 if (turn_off_dac) {
407 I915_WRITE(crt->adpa_reg, save_adpa);
408 POSTING_READ(crt->adpa_reg);
409 }
410 }
411
412 /* Check the status to see if both blue and green are on now */
413 adpa = I915_READ(crt->adpa_reg);
414 if ((adpa & ADPA_CRT_HOTPLUG_MONITOR_MASK) != 0)
415 ret = true;
416 else
417 ret = false;
418 DRM_DEBUG_KMS("ironlake hotplug adpa=0x%x, result %d\n", adpa, ret);
419
420 return ret;
421}
422
423static bool valleyview_crt_detect_hotplug(struct drm_connector *connector)
424{
425 struct drm_device *dev = connector->dev;
426 struct intel_crt *crt = intel_attached_crt(connector);
427 struct drm_i915_private *dev_priv = to_i915(dev);
428 bool reenable_hpd;
429 u32 adpa;
430 bool ret;
431 u32 save_adpa;
432
433 /*
434 * Doing a force trigger causes a hpd interrupt to get sent, which can
435 * get us stuck in a loop if we're polling:
436 * - We enable power wells and reset the ADPA
437 * - output_poll_exec does force probe on VGA, triggering a hpd
438 * - HPD handler waits for poll to unlock dev->mode_config.mutex
439 * - output_poll_exec shuts off the ADPA, unlocks
440 * dev->mode_config.mutex
441 * - HPD handler runs, resets ADPA and brings us back to the start
442 *
443 * Just disable HPD interrupts here to prevent this
444 */
445 reenable_hpd = intel_hpd_disable(dev_priv, crt->base.hpd_pin);
446
447 save_adpa = adpa = I915_READ(crt->adpa_reg);
448 DRM_DEBUG_KMS("trigger hotplug detect cycle: adpa=0x%x\n", adpa);
449
450 adpa |= ADPA_CRT_HOTPLUG_FORCE_TRIGGER;
451
452 I915_WRITE(crt->adpa_reg, adpa);
453
454 if (intel_wait_for_register(dev_priv,
455 crt->adpa_reg,
456 ADPA_CRT_HOTPLUG_FORCE_TRIGGER, 0,
457 1000)) {
458 DRM_DEBUG_KMS("timed out waiting for FORCE_TRIGGER");
459 I915_WRITE(crt->adpa_reg, save_adpa);
460 }
461
462 /* Check the status to see if both blue and green are on now */
463 adpa = I915_READ(crt->adpa_reg);
464 if ((adpa & ADPA_CRT_HOTPLUG_MONITOR_MASK) != 0)
465 ret = true;
466 else
467 ret = false;
468
469 DRM_DEBUG_KMS("valleyview hotplug adpa=0x%x, result %d\n", adpa, ret);
470
471 if (reenable_hpd)
472 intel_hpd_enable(dev_priv, crt->base.hpd_pin);
473
474 return ret;
475}
476
477static bool intel_crt_detect_hotplug(struct drm_connector *connector)
478{
479 struct drm_device *dev = connector->dev;
480 struct drm_i915_private *dev_priv = to_i915(dev);
481 u32 stat;
482 bool ret = false;
483 int i, tries = 0;
484
485 if (HAS_PCH_SPLIT(dev_priv))
486 return intel_ironlake_crt_detect_hotplug(connector);
487
488 if (IS_VALLEYVIEW(dev_priv))
489 return valleyview_crt_detect_hotplug(connector);
490
491 /*
492 * On 4 series desktop, CRT detect sequence need to be done twice
493 * to get a reliable result.
494 */
495
496 if (IS_G4X(dev_priv) && !IS_GM45(dev_priv))
497 tries = 2;
498 else
499 tries = 1;
500
501 for (i = 0; i < tries ; i++) {
502 /* turn on the FORCE_DETECT */
503 i915_hotplug_interrupt_update(dev_priv,
504 CRT_HOTPLUG_FORCE_DETECT,
505 CRT_HOTPLUG_FORCE_DETECT);
506 /* wait for FORCE_DETECT to go off */
507 if (intel_wait_for_register(dev_priv, PORT_HOTPLUG_EN,
508 CRT_HOTPLUG_FORCE_DETECT, 0,
509 1000))
510 DRM_DEBUG_KMS("timed out waiting for FORCE_DETECT to go off");
511 }
512
513 stat = I915_READ(PORT_HOTPLUG_STAT);
514 if ((stat & CRT_HOTPLUG_MONITOR_MASK) != CRT_HOTPLUG_MONITOR_NONE)
515 ret = true;
516
517 /* clear the interrupt we just generated, if any */
518 I915_WRITE(PORT_HOTPLUG_STAT, CRT_HOTPLUG_INT_STATUS);
519
520 i915_hotplug_interrupt_update(dev_priv, CRT_HOTPLUG_FORCE_DETECT, 0);
521
522 return ret;
523}
524
525static struct edid *intel_crt_get_edid(struct drm_connector *connector,
526 struct i2c_adapter *i2c)
527{
528 struct edid *edid;
529
530 edid = drm_get_edid(connector, i2c);
531
532 if (!edid && !intel_gmbus_is_forced_bit(i2c)) {
533 DRM_DEBUG_KMS("CRT GMBUS EDID read failed, retry using GPIO bit-banging\n");
534 intel_gmbus_force_bit(i2c, true);
535 edid = drm_get_edid(connector, i2c);
536 intel_gmbus_force_bit(i2c, false);
537 }
538
539 return edid;
540}
541
542/* local version of intel_ddc_get_modes() to use intel_crt_get_edid() */
543static int intel_crt_ddc_get_modes(struct drm_connector *connector,
544 struct i2c_adapter *adapter)
545{
546 struct edid *edid;
547 int ret;
548
549 edid = intel_crt_get_edid(connector, adapter);
550 if (!edid)
551 return 0;
552
553 ret = intel_connector_update_modes(connector, edid);
554 kfree(edid);
555
556 return ret;
557}
558
559static bool intel_crt_detect_ddc(struct drm_connector *connector)
560{
561 struct intel_crt *crt = intel_attached_crt(connector);
562 struct drm_i915_private *dev_priv = to_i915(crt->base.base.dev);
563 struct edid *edid;
564 struct i2c_adapter *i2c;
565 bool ret = false;
566
567 BUG_ON(crt->base.type != INTEL_OUTPUT_ANALOG);
568
569 i2c = intel_gmbus_get_adapter(dev_priv, dev_priv->vbt.crt_ddc_pin);
570 edid = intel_crt_get_edid(connector, i2c);
571
572 if (edid) {
573 bool is_digital = edid->input & DRM_EDID_INPUT_DIGITAL;
574
575 /*
576 * This may be a DVI-I connector with a shared DDC
577 * link between analog and digital outputs, so we
578 * have to check the EDID input spec of the attached device.
579 */
580 if (!is_digital) {
581 DRM_DEBUG_KMS("CRT detected via DDC:0x50 [EDID]\n");
582 ret = true;
583 } else {
584 DRM_DEBUG_KMS("CRT not detected via DDC:0x50 [EDID reports a digital panel]\n");
585 }
586 } else {
587 DRM_DEBUG_KMS("CRT not detected via DDC:0x50 [no valid EDID found]\n");
588 }
589
590 kfree(edid);
591
592 return ret;
593}
594
595static enum drm_connector_status
596intel_crt_load_detect(struct intel_crt *crt, uint32_t pipe)
597{
598 struct drm_device *dev = crt->base.base.dev;
599 struct drm_i915_private *dev_priv = to_i915(dev);
600 uint32_t save_bclrpat;
601 uint32_t save_vtotal;
602 uint32_t vtotal, vactive;
603 uint32_t vsample;
604 uint32_t vblank, vblank_start, vblank_end;
605 uint32_t dsl;
606 i915_reg_t bclrpat_reg, vtotal_reg,
607 vblank_reg, vsync_reg, pipeconf_reg, pipe_dsl_reg;
608 uint8_t st00;
609 enum drm_connector_status status;
610
611 DRM_DEBUG_KMS("starting load-detect on CRT\n");
612
613 bclrpat_reg = BCLRPAT(pipe);
614 vtotal_reg = VTOTAL(pipe);
615 vblank_reg = VBLANK(pipe);
616 vsync_reg = VSYNC(pipe);
617 pipeconf_reg = PIPECONF(pipe);
618 pipe_dsl_reg = PIPEDSL(pipe);
619
620 save_bclrpat = I915_READ(bclrpat_reg);
621 save_vtotal = I915_READ(vtotal_reg);
622 vblank = I915_READ(vblank_reg);
623
624 vtotal = ((save_vtotal >> 16) & 0xfff) + 1;
625 vactive = (save_vtotal & 0x7ff) + 1;
626
627 vblank_start = (vblank & 0xfff) + 1;
628 vblank_end = ((vblank >> 16) & 0xfff) + 1;
629
630 /* Set the border color to purple. */
631 I915_WRITE(bclrpat_reg, 0x500050);
632
633 if (!IS_GEN2(dev_priv)) {
634 uint32_t pipeconf = I915_READ(pipeconf_reg);
635 I915_WRITE(pipeconf_reg, pipeconf | PIPECONF_FORCE_BORDER);
636 POSTING_READ(pipeconf_reg);
637 /* Wait for next Vblank to substitue
638 * border color for Color info */
639 intel_wait_for_vblank(dev_priv, pipe);
640 st00 = I915_READ8(_VGA_MSR_WRITE);
641 status = ((st00 & (1 << 4)) != 0) ?
642 connector_status_connected :
643 connector_status_disconnected;
644
645 I915_WRITE(pipeconf_reg, pipeconf);
646 } else {
647 bool restore_vblank = false;
648 int count, detect;
649
650 /*
651 * If there isn't any border, add some.
652 * Yes, this will flicker
653 */
654 if (vblank_start <= vactive && vblank_end >= vtotal) {
655 uint32_t vsync = I915_READ(vsync_reg);
656 uint32_t vsync_start = (vsync & 0xffff) + 1;
657
658 vblank_start = vsync_start;
659 I915_WRITE(vblank_reg,
660 (vblank_start - 1) |
661 ((vblank_end - 1) << 16));
662 restore_vblank = true;
663 }
664 /* sample in the vertical border, selecting the larger one */
665 if (vblank_start - vactive >= vtotal - vblank_end)
666 vsample = (vblank_start + vactive) >> 1;
667 else
668 vsample = (vtotal + vblank_end) >> 1;
669
670 /*
671 * Wait for the border to be displayed
672 */
673 while (I915_READ(pipe_dsl_reg) >= vactive)
674 ;
675 while ((dsl = I915_READ(pipe_dsl_reg)) <= vsample)
676 ;
677 /*
678 * Watch ST00 for an entire scanline
679 */
680 detect = 0;
681 count = 0;
682 do {
683 count++;
684 /* Read the ST00 VGA status register */
685 st00 = I915_READ8(_VGA_MSR_WRITE);
686 if (st00 & (1 << 4))
687 detect++;
688 } while ((I915_READ(pipe_dsl_reg) == dsl));
689
690 /* restore vblank if necessary */
691 if (restore_vblank)
692 I915_WRITE(vblank_reg, vblank);
693 /*
694 * If more than 3/4 of the scanline detected a monitor,
695 * then it is assumed to be present. This works even on i830,
696 * where there isn't any way to force the border color across
697 * the screen
698 */
699 status = detect * 4 > count * 3 ?
700 connector_status_connected :
701 connector_status_disconnected;
702 }
703
704 /* Restore previous settings */
705 I915_WRITE(bclrpat_reg, save_bclrpat);
706
707 return status;
708}
709
710static int intel_spurious_crt_detect_dmi_callback(const struct dmi_system_id *id)
711{
712 DRM_DEBUG_DRIVER("Skipping CRT detection for %s\n", id->ident);
713 return 1;
714}
715
716static const struct dmi_system_id intel_spurious_crt_detect[] = {
717 {
718 .callback = intel_spurious_crt_detect_dmi_callback,
719 .ident = "ACER ZGB",
720 .matches = {
721 DMI_MATCH(DMI_SYS_VENDOR, "ACER"),
722 DMI_MATCH(DMI_PRODUCT_NAME, "ZGB"),
723 },
724 },
725 {
726 .callback = intel_spurious_crt_detect_dmi_callback,
727 .ident = "Intel DZ77BH-55K",
728 .matches = {
729 DMI_MATCH(DMI_BOARD_VENDOR, "Intel Corporation"),
730 DMI_MATCH(DMI_BOARD_NAME, "DZ77BH-55K"),
731 },
732 },
733 { }
734};
735
736static int
737intel_crt_detect(struct drm_connector *connector,
738 struct drm_modeset_acquire_ctx *ctx,
739 bool force)
740{
741 struct drm_i915_private *dev_priv = to_i915(connector->dev);
742 struct intel_crt *crt = intel_attached_crt(connector);
743 struct intel_encoder *intel_encoder = &crt->base;
744 int status, ret;
745 struct intel_load_detect_pipe tmp;
746
747 DRM_DEBUG_KMS("[CONNECTOR:%d:%s] force=%d\n",
748 connector->base.id, connector->name,
749 force);
750
751 /* Skip machines without VGA that falsely report hotplug events */
752 if (dmi_check_system(intel_spurious_crt_detect))
753 return connector_status_disconnected;
754
755 intel_display_power_get(dev_priv, intel_encoder->power_domain);
756
757 if (I915_HAS_HOTPLUG(dev_priv)) {
758 /* We can not rely on the HPD pin always being correctly wired
759 * up, for example many KVM do not pass it through, and so
760 * only trust an assertion that the monitor is connected.
761 */
762 if (intel_crt_detect_hotplug(connector)) {
763 DRM_DEBUG_KMS("CRT detected via hotplug\n");
764 status = connector_status_connected;
765 goto out;
766 } else
767 DRM_DEBUG_KMS("CRT not detected via hotplug\n");
768 }
769
770 if (intel_crt_detect_ddc(connector)) {
771 status = connector_status_connected;
772 goto out;
773 }
774
775 /* Load detection is broken on HPD capable machines. Whoever wants a
776 * broken monitor (without edid) to work behind a broken kvm (that fails
777 * to have the right resistors for HP detection) needs to fix this up.
778 * For now just bail out. */
779 if (I915_HAS_HOTPLUG(dev_priv) && !i915_modparams.load_detect_test) {
780 status = connector_status_disconnected;
781 goto out;
782 }
783
784 if (!force) {
785 status = connector->status;
786 goto out;
787 }
788
789 /* for pre-945g platforms use load detect */
790 ret = intel_get_load_detect_pipe(connector, NULL, &tmp, ctx);
791 if (ret > 0) {
792 if (intel_crt_detect_ddc(connector))
793 status = connector_status_connected;
794 else if (INTEL_GEN(dev_priv) < 4)
795 status = intel_crt_load_detect(crt,
796 to_intel_crtc(connector->state->crtc)->pipe);
797 else if (i915_modparams.load_detect_test)
798 status = connector_status_disconnected;
799 else
800 status = connector_status_unknown;
801 intel_release_load_detect_pipe(connector, &tmp, ctx);
802 } else if (ret == 0) {
803 status = connector_status_unknown;
804 } else {
805 status = ret;
806 }
807
808out:
809 intel_display_power_put(dev_priv, intel_encoder->power_domain);
810 return status;
811}
812
813static void intel_crt_destroy(struct drm_connector *connector)
814{
815 drm_connector_cleanup(connector);
816 kfree(connector);
817}
818
819static int intel_crt_get_modes(struct drm_connector *connector)
820{
821 struct drm_device *dev = connector->dev;
822 struct drm_i915_private *dev_priv = to_i915(dev);
823 struct intel_crt *crt = intel_attached_crt(connector);
824 struct intel_encoder *intel_encoder = &crt->base;
825 int ret;
826 struct i2c_adapter *i2c;
827
828 intel_display_power_get(dev_priv, intel_encoder->power_domain);
829
830 i2c = intel_gmbus_get_adapter(dev_priv, dev_priv->vbt.crt_ddc_pin);
831 ret = intel_crt_ddc_get_modes(connector, i2c);
832 if (ret || !IS_G4X(dev_priv))
833 goto out;
834
835 /* Try to probe digital port for output in DVI-I -> VGA mode. */
836 i2c = intel_gmbus_get_adapter(dev_priv, GMBUS_PIN_DPB);
837 ret = intel_crt_ddc_get_modes(connector, i2c);
838
839out:
840 intel_display_power_put(dev_priv, intel_encoder->power_domain);
841
842 return ret;
843}
844
845void intel_crt_reset(struct drm_encoder *encoder)
846{
847 struct drm_i915_private *dev_priv = to_i915(encoder->dev);
848 struct intel_crt *crt = intel_encoder_to_crt(to_intel_encoder(encoder));
849
850 if (INTEL_GEN(dev_priv) >= 5) {
851 u32 adpa;
852
853 adpa = I915_READ(crt->adpa_reg);
854 adpa &= ~ADPA_CRT_HOTPLUG_MASK;
855 adpa |= ADPA_HOTPLUG_BITS;
856 I915_WRITE(crt->adpa_reg, adpa);
857 POSTING_READ(crt->adpa_reg);
858
859 DRM_DEBUG_KMS("crt adpa set to 0x%x\n", adpa);
860 crt->force_hotplug_required = 1;
861 }
862
863}
864
865/*
866 * Routines for controlling stuff on the analog port
867 */
868
869static const struct drm_connector_funcs intel_crt_connector_funcs = {
870 .fill_modes = drm_helper_probe_single_connector_modes,
871 .late_register = intel_connector_register,
872 .early_unregister = intel_connector_unregister,
873 .destroy = intel_crt_destroy,
874 .atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
875 .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
876};
877
878static const struct drm_connector_helper_funcs intel_crt_connector_helper_funcs = {
879 .detect_ctx = intel_crt_detect,
880 .mode_valid = intel_crt_mode_valid,
881 .get_modes = intel_crt_get_modes,
882};
883
884static const struct drm_encoder_funcs intel_crt_enc_funcs = {
885 .reset = intel_crt_reset,
886 .destroy = intel_encoder_destroy,
887};
888
889void intel_crt_init(struct drm_i915_private *dev_priv)
890{
891 struct drm_connector *connector;
892 struct intel_crt *crt;
893 struct intel_connector *intel_connector;
894 i915_reg_t adpa_reg;
895 u32 adpa;
896
897 if (HAS_PCH_SPLIT(dev_priv))
898 adpa_reg = PCH_ADPA;
899 else if (IS_VALLEYVIEW(dev_priv))
900 adpa_reg = VLV_ADPA;
901 else
902 adpa_reg = ADPA;
903
904 adpa = I915_READ(adpa_reg);
905 if ((adpa & ADPA_DAC_ENABLE) == 0) {
906 /*
907 * On some machines (some IVB at least) CRT can be
908 * fused off, but there's no known fuse bit to
909 * indicate that. On these machine the ADPA register
910 * works normally, except the DAC enable bit won't
911 * take. So the only way to tell is attempt to enable
912 * it and see what happens.
913 */
914 I915_WRITE(adpa_reg, adpa | ADPA_DAC_ENABLE |
915 ADPA_HSYNC_CNTL_DISABLE | ADPA_VSYNC_CNTL_DISABLE);
916 if ((I915_READ(adpa_reg) & ADPA_DAC_ENABLE) == 0)
917 return;
918 I915_WRITE(adpa_reg, adpa);
919 }
920
921 crt = kzalloc(sizeof(struct intel_crt), GFP_KERNEL);
922 if (!crt)
923 return;
924
925 intel_connector = intel_connector_alloc();
926 if (!intel_connector) {
927 kfree(crt);
928 return;
929 }
930
931 connector = &intel_connector->base;
932 crt->connector = intel_connector;
933 drm_connector_init(&dev_priv->drm, &intel_connector->base,
934 &intel_crt_connector_funcs, DRM_MODE_CONNECTOR_VGA);
935
936 drm_encoder_init(&dev_priv->drm, &crt->base.base, &intel_crt_enc_funcs,
937 DRM_MODE_ENCODER_DAC, "CRT");
938
939 intel_connector_attach_encoder(intel_connector, &crt->base);
940
941 crt->base.type = INTEL_OUTPUT_ANALOG;
942 crt->base.cloneable = (1 << INTEL_OUTPUT_DVO) | (1 << INTEL_OUTPUT_HDMI);
943 if (IS_I830(dev_priv))
944 crt->base.crtc_mask = (1 << 0);
945 else
946 crt->base.crtc_mask = (1 << 0) | (1 << 1) | (1 << 2);
947
948 if (IS_GEN2(dev_priv))
949 connector->interlace_allowed = 0;
950 else
951 connector->interlace_allowed = 1;
952 connector->doublescan_allowed = 0;
953
954 crt->adpa_reg = adpa_reg;
955
956 crt->base.power_domain = POWER_DOMAIN_PORT_CRT;
957
958 if (I915_HAS_HOTPLUG(dev_priv) &&
959 !dmi_check_system(intel_spurious_crt_detect)) {
960 crt->base.hpd_pin = HPD_CRT;
961 crt->base.hotplug = intel_encoder_hotplug;
962 }
963
964 if (HAS_DDI(dev_priv)) {
965 crt->base.port = PORT_E;
966 crt->base.get_config = hsw_crt_get_config;
967 crt->base.get_hw_state = intel_ddi_get_hw_state;
968 crt->base.compute_config = hsw_crt_compute_config;
969 crt->base.pre_pll_enable = hsw_pre_pll_enable_crt;
970 crt->base.pre_enable = hsw_pre_enable_crt;
971 crt->base.enable = hsw_enable_crt;
972 crt->base.disable = hsw_disable_crt;
973 crt->base.post_disable = hsw_post_disable_crt;
974 } else {
975 if (HAS_PCH_SPLIT(dev_priv)) {
976 crt->base.compute_config = pch_crt_compute_config;
977 crt->base.disable = pch_disable_crt;
978 crt->base.post_disable = pch_post_disable_crt;
979 } else {
980 crt->base.compute_config = intel_crt_compute_config;
981 crt->base.disable = intel_disable_crt;
982 }
983 crt->base.port = PORT_NONE;
984 crt->base.get_config = intel_crt_get_config;
985 crt->base.get_hw_state = intel_crt_get_hw_state;
986 crt->base.enable = intel_enable_crt;
987 }
988 intel_connector->get_hw_state = intel_connector_get_hw_state;
989
990 drm_connector_helper_add(connector, &intel_crt_connector_helper_funcs);
991
992 if (!I915_HAS_HOTPLUG(dev_priv))
993 intel_connector->polled = DRM_CONNECTOR_POLL_CONNECT;
994
995 /*
996 * Configure the automatic hotplug detection stuff
997 */
998 crt->force_hotplug_required = 0;
999
1000 /*
1001 * TODO: find a proper way to discover whether we need to set the the
1002 * polarity and link reversal bits or not, instead of relying on the
1003 * BIOS.
1004 */
1005 if (HAS_PCH_LPT(dev_priv)) {
1006 u32 fdi_config = FDI_RX_POLARITY_REVERSED_LPT |
1007 FDI_RX_LINK_REVERSAL_OVERRIDE;
1008
1009 dev_priv->fdi_rx_config = I915_READ(FDI_RX_CTL(PIPE_A)) & fdi_config;
1010 }
1011
1012 intel_crt_reset(&crt->base.base);
1013}