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Merge tag 'v4.4-rc2' into drm-intel-next-queued
[mirror_ubuntu-zesty-kernel.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_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
47 struct 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
56 static struct intel_crt *intel_encoder_to_crt(struct intel_encoder *encoder)
57 {
58 return container_of(encoder, struct intel_crt, base);
59 }
60
61 static struct intel_crt *intel_attached_crt(struct drm_connector *connector)
62 {
63 return intel_encoder_to_crt(intel_attached_encoder(connector));
64 }
65
66 static 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 = dev->dev_private;
71 struct intel_crt *crt = intel_encoder_to_crt(encoder);
72 enum intel_display_power_domain power_domain;
73 u32 tmp;
74
75 power_domain = intel_display_port_power_domain(encoder);
76 if (!intel_display_power_is_enabled(dev_priv, power_domain))
77 return false;
78
79 tmp = I915_READ(crt->adpa_reg);
80
81 if (!(tmp & ADPA_DAC_ENABLE))
82 return false;
83
84 if (HAS_PCH_CPT(dev))
85 *pipe = PORT_TO_PIPE_CPT(tmp);
86 else
87 *pipe = PORT_TO_PIPE(tmp);
88
89 return true;
90 }
91
92 static unsigned int intel_crt_get_flags(struct intel_encoder *encoder)
93 {
94 struct drm_i915_private *dev_priv = encoder->base.dev->dev_private;
95 struct intel_crt *crt = intel_encoder_to_crt(encoder);
96 u32 tmp, flags = 0;
97
98 tmp = I915_READ(crt->adpa_reg);
99
100 if (tmp & ADPA_HSYNC_ACTIVE_HIGH)
101 flags |= DRM_MODE_FLAG_PHSYNC;
102 else
103 flags |= DRM_MODE_FLAG_NHSYNC;
104
105 if (tmp & ADPA_VSYNC_ACTIVE_HIGH)
106 flags |= DRM_MODE_FLAG_PVSYNC;
107 else
108 flags |= DRM_MODE_FLAG_NVSYNC;
109
110 return flags;
111 }
112
113 static void intel_crt_get_config(struct intel_encoder *encoder,
114 struct intel_crtc_state *pipe_config)
115 {
116 struct drm_device *dev = encoder->base.dev;
117 int dotclock;
118
119 pipe_config->base.adjusted_mode.flags |= intel_crt_get_flags(encoder);
120
121 dotclock = pipe_config->port_clock;
122
123 if (HAS_PCH_SPLIT(dev))
124 ironlake_check_encoder_dotclock(pipe_config, dotclock);
125
126 pipe_config->base.adjusted_mode.crtc_clock = dotclock;
127 }
128
129 static void hsw_crt_get_config(struct intel_encoder *encoder,
130 struct intel_crtc_state *pipe_config)
131 {
132 intel_ddi_get_config(encoder, pipe_config);
133
134 pipe_config->base.adjusted_mode.flags &= ~(DRM_MODE_FLAG_PHSYNC |
135 DRM_MODE_FLAG_NHSYNC |
136 DRM_MODE_FLAG_PVSYNC |
137 DRM_MODE_FLAG_NVSYNC);
138 pipe_config->base.adjusted_mode.flags |= intel_crt_get_flags(encoder);
139 }
140
141 /* Note: The caller is required to filter out dpms modes not supported by the
142 * platform. */
143 static void intel_crt_set_dpms(struct intel_encoder *encoder, int mode)
144 {
145 struct drm_device *dev = encoder->base.dev;
146 struct drm_i915_private *dev_priv = dev->dev_private;
147 struct intel_crt *crt = intel_encoder_to_crt(encoder);
148 struct intel_crtc *crtc = to_intel_crtc(encoder->base.crtc);
149 const struct drm_display_mode *adjusted_mode = &crtc->config->base.adjusted_mode;
150 u32 adpa;
151
152 if (INTEL_INFO(dev)->gen >= 5)
153 adpa = ADPA_HOTPLUG_BITS;
154 else
155 adpa = 0;
156
157 if (adjusted_mode->flags & DRM_MODE_FLAG_PHSYNC)
158 adpa |= ADPA_HSYNC_ACTIVE_HIGH;
159 if (adjusted_mode->flags & DRM_MODE_FLAG_PVSYNC)
160 adpa |= ADPA_VSYNC_ACTIVE_HIGH;
161
162 /* For CPT allow 3 pipe config, for others just use A or B */
163 if (HAS_PCH_LPT(dev))
164 ; /* Those bits don't exist here */
165 else if (HAS_PCH_CPT(dev))
166 adpa |= PORT_TRANS_SEL_CPT(crtc->pipe);
167 else if (crtc->pipe == 0)
168 adpa |= ADPA_PIPE_A_SELECT;
169 else
170 adpa |= ADPA_PIPE_B_SELECT;
171
172 if (!HAS_PCH_SPLIT(dev))
173 I915_WRITE(BCLRPAT(crtc->pipe), 0);
174
175 switch (mode) {
176 case DRM_MODE_DPMS_ON:
177 adpa |= ADPA_DAC_ENABLE;
178 break;
179 case DRM_MODE_DPMS_STANDBY:
180 adpa |= ADPA_DAC_ENABLE | ADPA_HSYNC_CNTL_DISABLE;
181 break;
182 case DRM_MODE_DPMS_SUSPEND:
183 adpa |= ADPA_DAC_ENABLE | ADPA_VSYNC_CNTL_DISABLE;
184 break;
185 case DRM_MODE_DPMS_OFF:
186 adpa |= ADPA_HSYNC_CNTL_DISABLE | ADPA_VSYNC_CNTL_DISABLE;
187 break;
188 }
189
190 I915_WRITE(crt->adpa_reg, adpa);
191 }
192
193 static void intel_disable_crt(struct intel_encoder *encoder)
194 {
195 intel_crt_set_dpms(encoder, DRM_MODE_DPMS_OFF);
196 }
197
198 static void pch_disable_crt(struct intel_encoder *encoder)
199 {
200 }
201
202 static void pch_post_disable_crt(struct intel_encoder *encoder)
203 {
204 intel_disable_crt(encoder);
205 }
206
207 static void intel_enable_crt(struct intel_encoder *encoder)
208 {
209 struct intel_crt *crt = intel_encoder_to_crt(encoder);
210
211 intel_crt_set_dpms(encoder, crt->connector->base.dpms);
212 }
213
214 static enum drm_mode_status
215 intel_crt_mode_valid(struct drm_connector *connector,
216 struct drm_display_mode *mode)
217 {
218 struct drm_device *dev = connector->dev;
219
220 int max_clock = 0;
221 if (mode->flags & DRM_MODE_FLAG_DBLSCAN)
222 return MODE_NO_DBLESCAN;
223
224 if (mode->clock < 25000)
225 return MODE_CLOCK_LOW;
226
227 if (IS_GEN2(dev))
228 max_clock = 350000;
229 else
230 max_clock = 400000;
231 if (mode->clock > max_clock)
232 return MODE_CLOCK_HIGH;
233
234 /* The FDI receiver on LPT only supports 8bpc and only has 2 lanes. */
235 if (HAS_PCH_LPT(dev) &&
236 (ironlake_get_lanes_required(mode->clock, 270000, 24) > 2))
237 return MODE_CLOCK_HIGH;
238
239 return MODE_OK;
240 }
241
242 static bool intel_crt_compute_config(struct intel_encoder *encoder,
243 struct intel_crtc_state *pipe_config)
244 {
245 struct drm_device *dev = encoder->base.dev;
246
247 if (HAS_PCH_SPLIT(dev))
248 pipe_config->has_pch_encoder = true;
249
250 /* LPT FDI RX only supports 8bpc. */
251 if (HAS_PCH_LPT(dev))
252 pipe_config->pipe_bpp = 24;
253
254 /* FDI must always be 2.7 GHz */
255 if (HAS_DDI(dev)) {
256 pipe_config->ddi_pll_sel = PORT_CLK_SEL_SPLL;
257 pipe_config->port_clock = 135000 * 2;
258
259 pipe_config->dpll_hw_state.wrpll = 0;
260 pipe_config->dpll_hw_state.spll =
261 SPLL_PLL_ENABLE | SPLL_PLL_FREQ_1350MHz | SPLL_PLL_SSC;
262 }
263
264 return true;
265 }
266
267 static bool intel_ironlake_crt_detect_hotplug(struct drm_connector *connector)
268 {
269 struct drm_device *dev = connector->dev;
270 struct intel_crt *crt = intel_attached_crt(connector);
271 struct drm_i915_private *dev_priv = dev->dev_private;
272 u32 adpa;
273 bool ret;
274
275 /* The first time through, trigger an explicit detection cycle */
276 if (crt->force_hotplug_required) {
277 bool turn_off_dac = HAS_PCH_SPLIT(dev);
278 u32 save_adpa;
279
280 crt->force_hotplug_required = 0;
281
282 save_adpa = adpa = I915_READ(crt->adpa_reg);
283 DRM_DEBUG_KMS("trigger hotplug detect cycle: adpa=0x%x\n", adpa);
284
285 adpa |= ADPA_CRT_HOTPLUG_FORCE_TRIGGER;
286 if (turn_off_dac)
287 adpa &= ~ADPA_DAC_ENABLE;
288
289 I915_WRITE(crt->adpa_reg, adpa);
290
291 if (wait_for((I915_READ(crt->adpa_reg) & ADPA_CRT_HOTPLUG_FORCE_TRIGGER) == 0,
292 1000))
293 DRM_DEBUG_KMS("timed out waiting for FORCE_TRIGGER");
294
295 if (turn_off_dac) {
296 I915_WRITE(crt->adpa_reg, save_adpa);
297 POSTING_READ(crt->adpa_reg);
298 }
299 }
300
301 /* Check the status to see if both blue and green are on now */
302 adpa = I915_READ(crt->adpa_reg);
303 if ((adpa & ADPA_CRT_HOTPLUG_MONITOR_MASK) != 0)
304 ret = true;
305 else
306 ret = false;
307 DRM_DEBUG_KMS("ironlake hotplug adpa=0x%x, result %d\n", adpa, ret);
308
309 return ret;
310 }
311
312 static bool valleyview_crt_detect_hotplug(struct drm_connector *connector)
313 {
314 struct drm_device *dev = connector->dev;
315 struct intel_crt *crt = intel_attached_crt(connector);
316 struct drm_i915_private *dev_priv = dev->dev_private;
317 u32 adpa;
318 bool ret;
319 u32 save_adpa;
320
321 save_adpa = adpa = I915_READ(crt->adpa_reg);
322 DRM_DEBUG_KMS("trigger hotplug detect cycle: adpa=0x%x\n", adpa);
323
324 adpa |= ADPA_CRT_HOTPLUG_FORCE_TRIGGER;
325
326 I915_WRITE(crt->adpa_reg, adpa);
327
328 if (wait_for((I915_READ(crt->adpa_reg) & ADPA_CRT_HOTPLUG_FORCE_TRIGGER) == 0,
329 1000)) {
330 DRM_DEBUG_KMS("timed out waiting for FORCE_TRIGGER");
331 I915_WRITE(crt->adpa_reg, save_adpa);
332 }
333
334 /* Check the status to see if both blue and green are on now */
335 adpa = I915_READ(crt->adpa_reg);
336 if ((adpa & ADPA_CRT_HOTPLUG_MONITOR_MASK) != 0)
337 ret = true;
338 else
339 ret = false;
340
341 DRM_DEBUG_KMS("valleyview hotplug adpa=0x%x, result %d\n", adpa, ret);
342
343 return ret;
344 }
345
346 /**
347 * Uses CRT_HOTPLUG_EN and CRT_HOTPLUG_STAT to detect CRT presence.
348 *
349 * Not for i915G/i915GM
350 *
351 * \return true if CRT is connected.
352 * \return false if CRT is disconnected.
353 */
354 static bool intel_crt_detect_hotplug(struct drm_connector *connector)
355 {
356 struct drm_device *dev = connector->dev;
357 struct drm_i915_private *dev_priv = dev->dev_private;
358 u32 stat;
359 bool ret = false;
360 int i, tries = 0;
361
362 if (HAS_PCH_SPLIT(dev))
363 return intel_ironlake_crt_detect_hotplug(connector);
364
365 if (IS_VALLEYVIEW(dev))
366 return valleyview_crt_detect_hotplug(connector);
367
368 /*
369 * On 4 series desktop, CRT detect sequence need to be done twice
370 * to get a reliable result.
371 */
372
373 if (IS_G4X(dev) && !IS_GM45(dev))
374 tries = 2;
375 else
376 tries = 1;
377
378 for (i = 0; i < tries ; i++) {
379 /* turn on the FORCE_DETECT */
380 i915_hotplug_interrupt_update(dev_priv,
381 CRT_HOTPLUG_FORCE_DETECT,
382 CRT_HOTPLUG_FORCE_DETECT);
383 /* wait for FORCE_DETECT to go off */
384 if (wait_for((I915_READ(PORT_HOTPLUG_EN) &
385 CRT_HOTPLUG_FORCE_DETECT) == 0,
386 1000))
387 DRM_DEBUG_KMS("timed out waiting for FORCE_DETECT to go off");
388 }
389
390 stat = I915_READ(PORT_HOTPLUG_STAT);
391 if ((stat & CRT_HOTPLUG_MONITOR_MASK) != CRT_HOTPLUG_MONITOR_NONE)
392 ret = true;
393
394 /* clear the interrupt we just generated, if any */
395 I915_WRITE(PORT_HOTPLUG_STAT, CRT_HOTPLUG_INT_STATUS);
396
397 i915_hotplug_interrupt_update(dev_priv, CRT_HOTPLUG_FORCE_DETECT, 0);
398
399 return ret;
400 }
401
402 static struct edid *intel_crt_get_edid(struct drm_connector *connector,
403 struct i2c_adapter *i2c)
404 {
405 struct edid *edid;
406
407 edid = drm_get_edid(connector, i2c);
408
409 if (!edid && !intel_gmbus_is_forced_bit(i2c)) {
410 DRM_DEBUG_KMS("CRT GMBUS EDID read failed, retry using GPIO bit-banging\n");
411 intel_gmbus_force_bit(i2c, true);
412 edid = drm_get_edid(connector, i2c);
413 intel_gmbus_force_bit(i2c, false);
414 }
415
416 return edid;
417 }
418
419 /* local version of intel_ddc_get_modes() to use intel_crt_get_edid() */
420 static int intel_crt_ddc_get_modes(struct drm_connector *connector,
421 struct i2c_adapter *adapter)
422 {
423 struct edid *edid;
424 int ret;
425
426 edid = intel_crt_get_edid(connector, adapter);
427 if (!edid)
428 return 0;
429
430 ret = intel_connector_update_modes(connector, edid);
431 kfree(edid);
432
433 return ret;
434 }
435
436 static bool intel_crt_detect_ddc(struct drm_connector *connector)
437 {
438 struct intel_crt *crt = intel_attached_crt(connector);
439 struct drm_i915_private *dev_priv = crt->base.base.dev->dev_private;
440 struct edid *edid;
441 struct i2c_adapter *i2c;
442
443 BUG_ON(crt->base.type != INTEL_OUTPUT_ANALOG);
444
445 i2c = intel_gmbus_get_adapter(dev_priv, dev_priv->vbt.crt_ddc_pin);
446 edid = intel_crt_get_edid(connector, i2c);
447
448 if (edid) {
449 bool is_digital = edid->input & DRM_EDID_INPUT_DIGITAL;
450
451 /*
452 * This may be a DVI-I connector with a shared DDC
453 * link between analog and digital outputs, so we
454 * have to check the EDID input spec of the attached device.
455 */
456 if (!is_digital) {
457 DRM_DEBUG_KMS("CRT detected via DDC:0x50 [EDID]\n");
458 return true;
459 }
460
461 DRM_DEBUG_KMS("CRT not detected via DDC:0x50 [EDID reports a digital panel]\n");
462 } else {
463 DRM_DEBUG_KMS("CRT not detected via DDC:0x50 [no valid EDID found]\n");
464 }
465
466 kfree(edid);
467
468 return false;
469 }
470
471 static enum drm_connector_status
472 intel_crt_load_detect(struct intel_crt *crt)
473 {
474 struct drm_device *dev = crt->base.base.dev;
475 struct drm_i915_private *dev_priv = dev->dev_private;
476 uint32_t pipe = to_intel_crtc(crt->base.base.crtc)->pipe;
477 uint32_t save_bclrpat;
478 uint32_t save_vtotal;
479 uint32_t vtotal, vactive;
480 uint32_t vsample;
481 uint32_t vblank, vblank_start, vblank_end;
482 uint32_t dsl;
483 i915_reg_t bclrpat_reg, vtotal_reg,
484 vblank_reg, vsync_reg, pipeconf_reg, pipe_dsl_reg;
485 uint8_t st00;
486 enum drm_connector_status status;
487
488 DRM_DEBUG_KMS("starting load-detect on CRT\n");
489
490 bclrpat_reg = BCLRPAT(pipe);
491 vtotal_reg = VTOTAL(pipe);
492 vblank_reg = VBLANK(pipe);
493 vsync_reg = VSYNC(pipe);
494 pipeconf_reg = PIPECONF(pipe);
495 pipe_dsl_reg = PIPEDSL(pipe);
496
497 save_bclrpat = I915_READ(bclrpat_reg);
498 save_vtotal = I915_READ(vtotal_reg);
499 vblank = I915_READ(vblank_reg);
500
501 vtotal = ((save_vtotal >> 16) & 0xfff) + 1;
502 vactive = (save_vtotal & 0x7ff) + 1;
503
504 vblank_start = (vblank & 0xfff) + 1;
505 vblank_end = ((vblank >> 16) & 0xfff) + 1;
506
507 /* Set the border color to purple. */
508 I915_WRITE(bclrpat_reg, 0x500050);
509
510 if (!IS_GEN2(dev)) {
511 uint32_t pipeconf = I915_READ(pipeconf_reg);
512 I915_WRITE(pipeconf_reg, pipeconf | PIPECONF_FORCE_BORDER);
513 POSTING_READ(pipeconf_reg);
514 /* Wait for next Vblank to substitue
515 * border color for Color info */
516 intel_wait_for_vblank(dev, pipe);
517 st00 = I915_READ8(_VGA_MSR_WRITE);
518 status = ((st00 & (1 << 4)) != 0) ?
519 connector_status_connected :
520 connector_status_disconnected;
521
522 I915_WRITE(pipeconf_reg, pipeconf);
523 } else {
524 bool restore_vblank = false;
525 int count, detect;
526
527 /*
528 * If there isn't any border, add some.
529 * Yes, this will flicker
530 */
531 if (vblank_start <= vactive && vblank_end >= vtotal) {
532 uint32_t vsync = I915_READ(vsync_reg);
533 uint32_t vsync_start = (vsync & 0xffff) + 1;
534
535 vblank_start = vsync_start;
536 I915_WRITE(vblank_reg,
537 (vblank_start - 1) |
538 ((vblank_end - 1) << 16));
539 restore_vblank = true;
540 }
541 /* sample in the vertical border, selecting the larger one */
542 if (vblank_start - vactive >= vtotal - vblank_end)
543 vsample = (vblank_start + vactive) >> 1;
544 else
545 vsample = (vtotal + vblank_end) >> 1;
546
547 /*
548 * Wait for the border to be displayed
549 */
550 while (I915_READ(pipe_dsl_reg) >= vactive)
551 ;
552 while ((dsl = I915_READ(pipe_dsl_reg)) <= vsample)
553 ;
554 /*
555 * Watch ST00 for an entire scanline
556 */
557 detect = 0;
558 count = 0;
559 do {
560 count++;
561 /* Read the ST00 VGA status register */
562 st00 = I915_READ8(_VGA_MSR_WRITE);
563 if (st00 & (1 << 4))
564 detect++;
565 } while ((I915_READ(pipe_dsl_reg) == dsl));
566
567 /* restore vblank if necessary */
568 if (restore_vblank)
569 I915_WRITE(vblank_reg, vblank);
570 /*
571 * If more than 3/4 of the scanline detected a monitor,
572 * then it is assumed to be present. This works even on i830,
573 * where there isn't any way to force the border color across
574 * the screen
575 */
576 status = detect * 4 > count * 3 ?
577 connector_status_connected :
578 connector_status_disconnected;
579 }
580
581 /* Restore previous settings */
582 I915_WRITE(bclrpat_reg, save_bclrpat);
583
584 return status;
585 }
586
587 static enum drm_connector_status
588 intel_crt_detect(struct drm_connector *connector, bool force)
589 {
590 struct drm_device *dev = connector->dev;
591 struct drm_i915_private *dev_priv = dev->dev_private;
592 struct intel_crt *crt = intel_attached_crt(connector);
593 struct intel_encoder *intel_encoder = &crt->base;
594 enum intel_display_power_domain power_domain;
595 enum drm_connector_status status;
596 struct intel_load_detect_pipe tmp;
597 struct drm_modeset_acquire_ctx ctx;
598
599 DRM_DEBUG_KMS("[CONNECTOR:%d:%s] force=%d\n",
600 connector->base.id, connector->name,
601 force);
602
603 power_domain = intel_display_port_power_domain(intel_encoder);
604 intel_display_power_get(dev_priv, power_domain);
605
606 if (I915_HAS_HOTPLUG(dev)) {
607 /* We can not rely on the HPD pin always being correctly wired
608 * up, for example many KVM do not pass it through, and so
609 * only trust an assertion that the monitor is connected.
610 */
611 if (intel_crt_detect_hotplug(connector)) {
612 DRM_DEBUG_KMS("CRT detected via hotplug\n");
613 status = connector_status_connected;
614 goto out;
615 } else
616 DRM_DEBUG_KMS("CRT not detected via hotplug\n");
617 }
618
619 if (intel_crt_detect_ddc(connector)) {
620 status = connector_status_connected;
621 goto out;
622 }
623
624 /* Load detection is broken on HPD capable machines. Whoever wants a
625 * broken monitor (without edid) to work behind a broken kvm (that fails
626 * to have the right resistors for HP detection) needs to fix this up.
627 * For now just bail out. */
628 if (I915_HAS_HOTPLUG(dev) && !i915.load_detect_test) {
629 status = connector_status_disconnected;
630 goto out;
631 }
632
633 if (!force) {
634 status = connector->status;
635 goto out;
636 }
637
638 drm_modeset_acquire_init(&ctx, 0);
639
640 /* for pre-945g platforms use load detect */
641 if (intel_get_load_detect_pipe(connector, NULL, &tmp, &ctx)) {
642 if (intel_crt_detect_ddc(connector))
643 status = connector_status_connected;
644 else if (INTEL_INFO(dev)->gen < 4)
645 status = intel_crt_load_detect(crt);
646 else
647 status = connector_status_unknown;
648 intel_release_load_detect_pipe(connector, &tmp, &ctx);
649 } else
650 status = connector_status_unknown;
651
652 drm_modeset_drop_locks(&ctx);
653 drm_modeset_acquire_fini(&ctx);
654
655 out:
656 intel_display_power_put(dev_priv, power_domain);
657 return status;
658 }
659
660 static void intel_crt_destroy(struct drm_connector *connector)
661 {
662 drm_connector_cleanup(connector);
663 kfree(connector);
664 }
665
666 static int intel_crt_get_modes(struct drm_connector *connector)
667 {
668 struct drm_device *dev = connector->dev;
669 struct drm_i915_private *dev_priv = dev->dev_private;
670 struct intel_crt *crt = intel_attached_crt(connector);
671 struct intel_encoder *intel_encoder = &crt->base;
672 enum intel_display_power_domain power_domain;
673 int ret;
674 struct i2c_adapter *i2c;
675
676 power_domain = intel_display_port_power_domain(intel_encoder);
677 intel_display_power_get(dev_priv, power_domain);
678
679 i2c = intel_gmbus_get_adapter(dev_priv, dev_priv->vbt.crt_ddc_pin);
680 ret = intel_crt_ddc_get_modes(connector, i2c);
681 if (ret || !IS_G4X(dev))
682 goto out;
683
684 /* Try to probe digital port for output in DVI-I -> VGA mode. */
685 i2c = intel_gmbus_get_adapter(dev_priv, GMBUS_PIN_DPB);
686 ret = intel_crt_ddc_get_modes(connector, i2c);
687
688 out:
689 intel_display_power_put(dev_priv, power_domain);
690
691 return ret;
692 }
693
694 static int intel_crt_set_property(struct drm_connector *connector,
695 struct drm_property *property,
696 uint64_t value)
697 {
698 return 0;
699 }
700
701 static void intel_crt_reset(struct drm_connector *connector)
702 {
703 struct drm_device *dev = connector->dev;
704 struct drm_i915_private *dev_priv = dev->dev_private;
705 struct intel_crt *crt = intel_attached_crt(connector);
706
707 if (INTEL_INFO(dev)->gen >= 5) {
708 u32 adpa;
709
710 adpa = I915_READ(crt->adpa_reg);
711 adpa &= ~ADPA_CRT_HOTPLUG_MASK;
712 adpa |= ADPA_HOTPLUG_BITS;
713 I915_WRITE(crt->adpa_reg, adpa);
714 POSTING_READ(crt->adpa_reg);
715
716 DRM_DEBUG_KMS("crt adpa set to 0x%x\n", adpa);
717 crt->force_hotplug_required = 1;
718 }
719
720 }
721
722 /*
723 * Routines for controlling stuff on the analog port
724 */
725
726 static const struct drm_connector_funcs intel_crt_connector_funcs = {
727 .reset = intel_crt_reset,
728 .dpms = drm_atomic_helper_connector_dpms,
729 .detect = intel_crt_detect,
730 .fill_modes = drm_helper_probe_single_connector_modes,
731 .destroy = intel_crt_destroy,
732 .set_property = intel_crt_set_property,
733 .atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
734 .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
735 .atomic_get_property = intel_connector_atomic_get_property,
736 };
737
738 static const struct drm_connector_helper_funcs intel_crt_connector_helper_funcs = {
739 .mode_valid = intel_crt_mode_valid,
740 .get_modes = intel_crt_get_modes,
741 .best_encoder = intel_best_encoder,
742 };
743
744 static const struct drm_encoder_funcs intel_crt_enc_funcs = {
745 .destroy = intel_encoder_destroy,
746 };
747
748 static int intel_no_crt_dmi_callback(const struct dmi_system_id *id)
749 {
750 DRM_INFO("Skipping CRT initialization for %s\n", id->ident);
751 return 1;
752 }
753
754 static const struct dmi_system_id intel_no_crt[] = {
755 {
756 .callback = intel_no_crt_dmi_callback,
757 .ident = "ACER ZGB",
758 .matches = {
759 DMI_MATCH(DMI_SYS_VENDOR, "ACER"),
760 DMI_MATCH(DMI_PRODUCT_NAME, "ZGB"),
761 },
762 },
763 {
764 .callback = intel_no_crt_dmi_callback,
765 .ident = "DELL XPS 8700",
766 .matches = {
767 DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
768 DMI_MATCH(DMI_PRODUCT_NAME, "XPS 8700"),
769 },
770 },
771 { }
772 };
773
774 void intel_crt_init(struct drm_device *dev)
775 {
776 struct drm_connector *connector;
777 struct intel_crt *crt;
778 struct intel_connector *intel_connector;
779 struct drm_i915_private *dev_priv = dev->dev_private;
780
781 /* Skip machines without VGA that falsely report hotplug events */
782 if (dmi_check_system(intel_no_crt))
783 return;
784
785 crt = kzalloc(sizeof(struct intel_crt), GFP_KERNEL);
786 if (!crt)
787 return;
788
789 intel_connector = intel_connector_alloc();
790 if (!intel_connector) {
791 kfree(crt);
792 return;
793 }
794
795 connector = &intel_connector->base;
796 crt->connector = intel_connector;
797 drm_connector_init(dev, &intel_connector->base,
798 &intel_crt_connector_funcs, DRM_MODE_CONNECTOR_VGA);
799
800 drm_encoder_init(dev, &crt->base.base, &intel_crt_enc_funcs,
801 DRM_MODE_ENCODER_DAC);
802
803 intel_connector_attach_encoder(intel_connector, &crt->base);
804
805 crt->base.type = INTEL_OUTPUT_ANALOG;
806 crt->base.cloneable = (1 << INTEL_OUTPUT_DVO) | (1 << INTEL_OUTPUT_HDMI);
807 if (IS_I830(dev))
808 crt->base.crtc_mask = (1 << 0);
809 else
810 crt->base.crtc_mask = (1 << 0) | (1 << 1) | (1 << 2);
811
812 if (IS_GEN2(dev))
813 connector->interlace_allowed = 0;
814 else
815 connector->interlace_allowed = 1;
816 connector->doublescan_allowed = 0;
817
818 if (HAS_PCH_SPLIT(dev))
819 crt->adpa_reg = PCH_ADPA;
820 else if (IS_VALLEYVIEW(dev))
821 crt->adpa_reg = VLV_ADPA;
822 else
823 crt->adpa_reg = ADPA;
824
825 crt->base.compute_config = intel_crt_compute_config;
826 if (HAS_PCH_SPLIT(dev) && !HAS_DDI(dev)) {
827 crt->base.disable = pch_disable_crt;
828 crt->base.post_disable = pch_post_disable_crt;
829 } else {
830 crt->base.disable = intel_disable_crt;
831 }
832 crt->base.enable = intel_enable_crt;
833 if (I915_HAS_HOTPLUG(dev))
834 crt->base.hpd_pin = HPD_CRT;
835 if (HAS_DDI(dev)) {
836 crt->base.get_config = hsw_crt_get_config;
837 crt->base.get_hw_state = intel_ddi_get_hw_state;
838 } else {
839 crt->base.get_config = intel_crt_get_config;
840 crt->base.get_hw_state = intel_crt_get_hw_state;
841 }
842 intel_connector->get_hw_state = intel_connector_get_hw_state;
843 intel_connector->unregister = intel_connector_unregister;
844
845 drm_connector_helper_add(connector, &intel_crt_connector_helper_funcs);
846
847 drm_connector_register(connector);
848
849 if (!I915_HAS_HOTPLUG(dev))
850 intel_connector->polled = DRM_CONNECTOR_POLL_CONNECT;
851
852 /*
853 * Configure the automatic hotplug detection stuff
854 */
855 crt->force_hotplug_required = 0;
856
857 /*
858 * TODO: find a proper way to discover whether we need to set the the
859 * polarity and link reversal bits or not, instead of relying on the
860 * BIOS.
861 */
862 if (HAS_PCH_LPT(dev)) {
863 u32 fdi_config = FDI_RX_POLARITY_REVERSED_LPT |
864 FDI_RX_LINK_REVERSAL_OVERRIDE;
865
866 dev_priv->fdi_rx_config = I915_READ(FDI_RX_CTL(PIPE_A)) & fdi_config;
867 }
868
869 intel_crt_reset(connector);
870 }