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1/*
2 * Copyright © 2006-2007 Intel Corporation
3 * Copyright (c) 2006 Dave Airlie <airlied@linux.ie>
4 *
5 * Permission is hereby granted, free of charge, to any person obtaining a
6 * copy of this software and associated documentation files (the "Software"),
7 * to deal in the Software without restriction, including without limitation
8 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
9 * and/or sell copies of the Software, and to permit persons to whom the
10 * Software is furnished to do so, subject to the following conditions:
11 *
12 * The above copyright notice and this permission notice (including the next
13 * paragraph) shall be included in all copies or substantial portions of the
14 * Software.
15 *
16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
19 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
20 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
21 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
22 * DEALINGS IN THE SOFTWARE.
23 *
24 * Authors:
25 * Eric Anholt <eric@anholt.net>
26 * Dave Airlie <airlied@linux.ie>
27 * Jesse Barnes <jesse.barnes@intel.com>
28 */
29
30#include <acpi/button.h>
31#include <linux/dmi.h>
32#include <linux/i2c.h>
33#include <linux/slab.h>
34#include <linux/vga_switcheroo.h>
35#include <drm/drmP.h>
36#include <drm/drm_atomic_helper.h>
37#include <drm/drm_crtc.h>
38#include <drm/drm_edid.h>
39#include "intel_drv.h"
40#include <drm/i915_drm.h>
41#include "i915_drv.h"
42#include <linux/acpi.h>
43
44/* Private structure for the integrated LVDS support */
45struct intel_lvds_connector {
46 struct intel_connector base;
47
48 struct notifier_block lid_notifier;
49};
50
51struct intel_lvds_encoder {
52 struct intel_encoder base;
53
54 bool is_dual_link;
55 i915_reg_t reg;
56 u32 a3_power;
57
58 struct intel_lvds_connector *attached_connector;
59};
60
61static struct intel_lvds_encoder *to_lvds_encoder(struct drm_encoder *encoder)
62{
63 return container_of(encoder, struct intel_lvds_encoder, base.base);
64}
65
66static struct intel_lvds_connector *to_lvds_connector(struct drm_connector *connector)
67{
68 return container_of(connector, struct intel_lvds_connector, base.base);
69}
70
71static bool intel_lvds_get_hw_state(struct intel_encoder *encoder,
72 enum pipe *pipe)
73{
74 struct drm_device *dev = encoder->base.dev;
75 struct drm_i915_private *dev_priv = dev->dev_private;
76 struct intel_lvds_encoder *lvds_encoder = to_lvds_encoder(&encoder->base);
77 enum intel_display_power_domain power_domain;
78 u32 tmp;
79 bool ret;
80
81 power_domain = intel_display_port_power_domain(encoder);
82 if (!intel_display_power_get_if_enabled(dev_priv, power_domain))
83 return false;
84
85 ret = false;
86
87 tmp = I915_READ(lvds_encoder->reg);
88
89 if (!(tmp & LVDS_PORT_EN))
90 goto out;
91
92 if (HAS_PCH_CPT(dev))
93 *pipe = PORT_TO_PIPE_CPT(tmp);
94 else
95 *pipe = PORT_TO_PIPE(tmp);
96
97 ret = true;
98
99out:
100 intel_display_power_put(dev_priv, power_domain);
101
102 return ret;
103}
104
105static void intel_lvds_get_config(struct intel_encoder *encoder,
106 struct intel_crtc_state *pipe_config)
107{
108 struct drm_device *dev = encoder->base.dev;
109 struct drm_i915_private *dev_priv = dev->dev_private;
110 struct intel_lvds_encoder *lvds_encoder = to_lvds_encoder(&encoder->base);
111 u32 tmp, flags = 0;
112 int dotclock;
113
114 tmp = I915_READ(lvds_encoder->reg);
115 if (tmp & LVDS_HSYNC_POLARITY)
116 flags |= DRM_MODE_FLAG_NHSYNC;
117 else
118 flags |= DRM_MODE_FLAG_PHSYNC;
119 if (tmp & LVDS_VSYNC_POLARITY)
120 flags |= DRM_MODE_FLAG_NVSYNC;
121 else
122 flags |= DRM_MODE_FLAG_PVSYNC;
123
124 pipe_config->base.adjusted_mode.flags |= flags;
125
126 if (INTEL_INFO(dev)->gen < 5)
127 pipe_config->gmch_pfit.lvds_border_bits =
128 tmp & LVDS_BORDER_ENABLE;
129
130 /* gen2/3 store dither state in pfit control, needs to match */
131 if (INTEL_INFO(dev)->gen < 4) {
132 tmp = I915_READ(PFIT_CONTROL);
133
134 pipe_config->gmch_pfit.control |= tmp & PANEL_8TO6_DITHER_ENABLE;
135 }
136
137 dotclock = pipe_config->port_clock;
138
139 if (HAS_PCH_SPLIT(dev_priv->dev))
140 ironlake_check_encoder_dotclock(pipe_config, dotclock);
141
142 pipe_config->base.adjusted_mode.crtc_clock = dotclock;
143}
144
145static void intel_pre_enable_lvds(struct intel_encoder *encoder)
146{
147 struct intel_lvds_encoder *lvds_encoder = to_lvds_encoder(&encoder->base);
148 struct drm_device *dev = encoder->base.dev;
149 struct drm_i915_private *dev_priv = dev->dev_private;
150 struct intel_crtc *crtc = to_intel_crtc(encoder->base.crtc);
151 const struct drm_display_mode *adjusted_mode = &crtc->config->base.adjusted_mode;
152 int pipe = crtc->pipe;
153 u32 temp;
154
155 if (HAS_PCH_SPLIT(dev)) {
156 assert_fdi_rx_pll_disabled(dev_priv, pipe);
157 assert_shared_dpll_disabled(dev_priv,
158 intel_crtc_to_shared_dpll(crtc));
159 } else {
160 assert_pll_disabled(dev_priv, pipe);
161 }
162
163 temp = I915_READ(lvds_encoder->reg);
164 temp |= LVDS_PORT_EN | LVDS_A0A2_CLKA_POWER_UP;
165
166 if (HAS_PCH_CPT(dev)) {
167 temp &= ~PORT_TRANS_SEL_MASK;
168 temp |= PORT_TRANS_SEL_CPT(pipe);
169 } else {
170 if (pipe == 1) {
171 temp |= LVDS_PIPEB_SELECT;
172 } else {
173 temp &= ~LVDS_PIPEB_SELECT;
174 }
175 }
176
177 /* set the corresponsding LVDS_BORDER bit */
178 temp &= ~LVDS_BORDER_ENABLE;
179 temp |= crtc->config->gmch_pfit.lvds_border_bits;
180 /* Set the B0-B3 data pairs corresponding to whether we're going to
181 * set the DPLLs for dual-channel mode or not.
182 */
183 if (lvds_encoder->is_dual_link)
184 temp |= LVDS_B0B3_POWER_UP | LVDS_CLKB_POWER_UP;
185 else
186 temp &= ~(LVDS_B0B3_POWER_UP | LVDS_CLKB_POWER_UP);
187
188 /* It would be nice to set 24 vs 18-bit mode (LVDS_A3_POWER_UP)
189 * appropriately here, but we need to look more thoroughly into how
190 * panels behave in the two modes. For now, let's just maintain the
191 * value we got from the BIOS.
192 */
193 temp &= ~LVDS_A3_POWER_MASK;
194 temp |= lvds_encoder->a3_power;
195
196 /* Set the dithering flag on LVDS as needed, note that there is no
197 * special lvds dither control bit on pch-split platforms, dithering is
198 * only controlled through the PIPECONF reg. */
199 if (INTEL_INFO(dev)->gen == 4) {
200 /* Bspec wording suggests that LVDS port dithering only exists
201 * for 18bpp panels. */
202 if (crtc->config->dither && crtc->config->pipe_bpp == 18)
203 temp |= LVDS_ENABLE_DITHER;
204 else
205 temp &= ~LVDS_ENABLE_DITHER;
206 }
207 temp &= ~(LVDS_HSYNC_POLARITY | LVDS_VSYNC_POLARITY);
208 if (adjusted_mode->flags & DRM_MODE_FLAG_NHSYNC)
209 temp |= LVDS_HSYNC_POLARITY;
210 if (adjusted_mode->flags & DRM_MODE_FLAG_NVSYNC)
211 temp |= LVDS_VSYNC_POLARITY;
212
213 I915_WRITE(lvds_encoder->reg, temp);
214}
215
216/**
217 * Sets the power state for the panel.
218 */
219static void intel_enable_lvds(struct intel_encoder *encoder)
220{
221 struct drm_device *dev = encoder->base.dev;
222 struct intel_lvds_encoder *lvds_encoder = to_lvds_encoder(&encoder->base);
223 struct intel_connector *intel_connector =
224 &lvds_encoder->attached_connector->base;
225 struct drm_i915_private *dev_priv = dev->dev_private;
226 i915_reg_t ctl_reg, stat_reg;
227
228 if (HAS_PCH_SPLIT(dev)) {
229 ctl_reg = PCH_PP_CONTROL;
230 stat_reg = PCH_PP_STATUS;
231 } else {
232 ctl_reg = PP_CONTROL;
233 stat_reg = PP_STATUS;
234 }
235
236 I915_WRITE(lvds_encoder->reg, I915_READ(lvds_encoder->reg) | LVDS_PORT_EN);
237
238 I915_WRITE(ctl_reg, I915_READ(ctl_reg) | POWER_TARGET_ON);
239 POSTING_READ(lvds_encoder->reg);
240 if (wait_for((I915_READ(stat_reg) & PP_ON) != 0, 1000))
241 DRM_ERROR("timed out waiting for panel to power on\n");
242
243 intel_panel_enable_backlight(intel_connector);
244}
245
246static void intel_disable_lvds(struct intel_encoder *encoder)
247{
248 struct drm_device *dev = encoder->base.dev;
249 struct intel_lvds_encoder *lvds_encoder = to_lvds_encoder(&encoder->base);
250 struct drm_i915_private *dev_priv = dev->dev_private;
251 i915_reg_t ctl_reg, stat_reg;
252
253 if (HAS_PCH_SPLIT(dev)) {
254 ctl_reg = PCH_PP_CONTROL;
255 stat_reg = PCH_PP_STATUS;
256 } else {
257 ctl_reg = PP_CONTROL;
258 stat_reg = PP_STATUS;
259 }
260
261 I915_WRITE(ctl_reg, I915_READ(ctl_reg) & ~POWER_TARGET_ON);
262 if (wait_for((I915_READ(stat_reg) & PP_ON) == 0, 1000))
263 DRM_ERROR("timed out waiting for panel to power off\n");
264
265 I915_WRITE(lvds_encoder->reg, I915_READ(lvds_encoder->reg) & ~LVDS_PORT_EN);
266 POSTING_READ(lvds_encoder->reg);
267}
268
269static void gmch_disable_lvds(struct intel_encoder *encoder)
270{
271 struct intel_lvds_encoder *lvds_encoder = to_lvds_encoder(&encoder->base);
272 struct intel_connector *intel_connector =
273 &lvds_encoder->attached_connector->base;
274
275 intel_panel_disable_backlight(intel_connector);
276
277 intel_disable_lvds(encoder);
278}
279
280static void pch_disable_lvds(struct intel_encoder *encoder)
281{
282 struct intel_lvds_encoder *lvds_encoder = to_lvds_encoder(&encoder->base);
283 struct intel_connector *intel_connector =
284 &lvds_encoder->attached_connector->base;
285
286 intel_panel_disable_backlight(intel_connector);
287}
288
289static void pch_post_disable_lvds(struct intel_encoder *encoder)
290{
291 intel_disable_lvds(encoder);
292}
293
294static enum drm_mode_status
295intel_lvds_mode_valid(struct drm_connector *connector,
296 struct drm_display_mode *mode)
297{
298 struct intel_connector *intel_connector = to_intel_connector(connector);
299 struct drm_display_mode *fixed_mode = intel_connector->panel.fixed_mode;
300 int max_pixclk = to_i915(connector->dev)->max_dotclk_freq;
301
302 if (mode->hdisplay > fixed_mode->hdisplay)
303 return MODE_PANEL;
304 if (mode->vdisplay > fixed_mode->vdisplay)
305 return MODE_PANEL;
306 if (fixed_mode->clock > max_pixclk)
307 return MODE_CLOCK_HIGH;
308
309 return MODE_OK;
310}
311
312static bool intel_lvds_compute_config(struct intel_encoder *intel_encoder,
313 struct intel_crtc_state *pipe_config)
314{
315 struct drm_device *dev = intel_encoder->base.dev;
316 struct intel_lvds_encoder *lvds_encoder =
317 to_lvds_encoder(&intel_encoder->base);
318 struct intel_connector *intel_connector =
319 &lvds_encoder->attached_connector->base;
320 struct drm_display_mode *adjusted_mode = &pipe_config->base.adjusted_mode;
321 struct intel_crtc *intel_crtc = to_intel_crtc(pipe_config->base.crtc);
322 unsigned int lvds_bpp;
323
324 /* Should never happen!! */
325 if (INTEL_INFO(dev)->gen < 4 && intel_crtc->pipe == 0) {
326 DRM_ERROR("Can't support LVDS on pipe A\n");
327 return false;
328 }
329
330 if (lvds_encoder->a3_power == LVDS_A3_POWER_UP)
331 lvds_bpp = 8*3;
332 else
333 lvds_bpp = 6*3;
334
335 if (lvds_bpp != pipe_config->pipe_bpp && !pipe_config->bw_constrained) {
336 DRM_DEBUG_KMS("forcing display bpp (was %d) to LVDS (%d)\n",
337 pipe_config->pipe_bpp, lvds_bpp);
338 pipe_config->pipe_bpp = lvds_bpp;
339 }
340
341 /*
342 * We have timings from the BIOS for the panel, put them in
343 * to the adjusted mode. The CRTC will be set up for this mode,
344 * with the panel scaling set up to source from the H/VDisplay
345 * of the original mode.
346 */
347 intel_fixed_panel_mode(intel_connector->panel.fixed_mode,
348 adjusted_mode);
349
350 if (HAS_PCH_SPLIT(dev)) {
351 pipe_config->has_pch_encoder = true;
352
353 intel_pch_panel_fitting(intel_crtc, pipe_config,
354 intel_connector->panel.fitting_mode);
355 } else {
356 intel_gmch_panel_fitting(intel_crtc, pipe_config,
357 intel_connector->panel.fitting_mode);
358
359 }
360
361 /*
362 * XXX: It would be nice to support lower refresh rates on the
363 * panels to reduce power consumption, and perhaps match the
364 * user's requested refresh rate.
365 */
366
367 return true;
368}
369
370/**
371 * Detect the LVDS connection.
372 *
373 * Since LVDS doesn't have hotlug, we use the lid as a proxy. Open means
374 * connected and closed means disconnected. We also send hotplug events as
375 * needed, using lid status notification from the input layer.
376 */
377static enum drm_connector_status
378intel_lvds_detect(struct drm_connector *connector, bool force)
379{
380 struct drm_device *dev = connector->dev;
381 enum drm_connector_status status;
382
383 DRM_DEBUG_KMS("[CONNECTOR:%d:%s]\n",
384 connector->base.id, connector->name);
385
386 status = intel_panel_detect(dev);
387 if (status != connector_status_unknown)
388 return status;
389
390 return connector_status_connected;
391}
392
393/**
394 * Return the list of DDC modes if available, or the BIOS fixed mode otherwise.
395 */
396static int intel_lvds_get_modes(struct drm_connector *connector)
397{
398 struct intel_lvds_connector *lvds_connector = to_lvds_connector(connector);
399 struct drm_device *dev = connector->dev;
400 struct drm_display_mode *mode;
401
402 /* use cached edid if we have one */
403 if (!IS_ERR_OR_NULL(lvds_connector->base.edid))
404 return drm_add_edid_modes(connector, lvds_connector->base.edid);
405
406 mode = drm_mode_duplicate(dev, lvds_connector->base.panel.fixed_mode);
407 if (mode == NULL)
408 return 0;
409
410 drm_mode_probed_add(connector, mode);
411 return 1;
412}
413
414static int intel_no_modeset_on_lid_dmi_callback(const struct dmi_system_id *id)
415{
416 DRM_INFO("Skipping forced modeset for %s\n", id->ident);
417 return 1;
418}
419
420/* The GPU hangs up on these systems if modeset is performed on LID open */
421static const struct dmi_system_id intel_no_modeset_on_lid[] = {
422 {
423 .callback = intel_no_modeset_on_lid_dmi_callback,
424 .ident = "Toshiba Tecra A11",
425 .matches = {
426 DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
427 DMI_MATCH(DMI_PRODUCT_NAME, "TECRA A11"),
428 },
429 },
430
431 { } /* terminating entry */
432};
433
434/*
435 * Lid events. Note the use of 'modeset':
436 * - we set it to MODESET_ON_LID_OPEN on lid close,
437 * and set it to MODESET_DONE on open
438 * - we use it as a "only once" bit (ie we ignore
439 * duplicate events where it was already properly set)
440 * - the suspend/resume paths will set it to
441 * MODESET_SUSPENDED and ignore the lid open event,
442 * because they restore the mode ("lid open").
443 */
444static int intel_lid_notify(struct notifier_block *nb, unsigned long val,
445 void *unused)
446{
447 struct intel_lvds_connector *lvds_connector =
448 container_of(nb, struct intel_lvds_connector, lid_notifier);
449 struct drm_connector *connector = &lvds_connector->base.base;
450 struct drm_device *dev = connector->dev;
451 struct drm_i915_private *dev_priv = dev->dev_private;
452
453 if (dev->switch_power_state != DRM_SWITCH_POWER_ON)
454 return NOTIFY_OK;
455
456 mutex_lock(&dev_priv->modeset_restore_lock);
457 if (dev_priv->modeset_restore == MODESET_SUSPENDED)
458 goto exit;
459 /*
460 * check and update the status of LVDS connector after receiving
461 * the LID nofication event.
462 */
463 connector->status = connector->funcs->detect(connector, false);
464
465 /* Don't force modeset on machines where it causes a GPU lockup */
466 if (dmi_check_system(intel_no_modeset_on_lid))
467 goto exit;
468 if (!acpi_lid_open()) {
469 /* do modeset on next lid open event */
470 dev_priv->modeset_restore = MODESET_ON_LID_OPEN;
471 goto exit;
472 }
473
474 if (dev_priv->modeset_restore == MODESET_DONE)
475 goto exit;
476
477 /*
478 * Some old platform's BIOS love to wreak havoc while the lid is closed.
479 * We try to detect this here and undo any damage. The split for PCH
480 * platforms is rather conservative and a bit arbitrary expect that on
481 * those platforms VGA disabling requires actual legacy VGA I/O access,
482 * and as part of the cleanup in the hw state restore we also redisable
483 * the vga plane.
484 */
485 if (!HAS_PCH_SPLIT(dev))
486 intel_display_resume(dev);
487
488 dev_priv->modeset_restore = MODESET_DONE;
489
490exit:
491 mutex_unlock(&dev_priv->modeset_restore_lock);
492 return NOTIFY_OK;
493}
494
495/**
496 * intel_lvds_destroy - unregister and free LVDS structures
497 * @connector: connector to free
498 *
499 * Unregister the DDC bus for this connector then free the driver private
500 * structure.
501 */
502static void intel_lvds_destroy(struct drm_connector *connector)
503{
504 struct intel_lvds_connector *lvds_connector =
505 to_lvds_connector(connector);
506
507 if (lvds_connector->lid_notifier.notifier_call)
508 acpi_lid_notifier_unregister(&lvds_connector->lid_notifier);
509
510 if (!IS_ERR_OR_NULL(lvds_connector->base.edid))
511 kfree(lvds_connector->base.edid);
512
513 intel_panel_fini(&lvds_connector->base.panel);
514
515 drm_connector_cleanup(connector);
516 kfree(connector);
517}
518
519static int intel_lvds_set_property(struct drm_connector *connector,
520 struct drm_property *property,
521 uint64_t value)
522{
523 struct intel_connector *intel_connector = to_intel_connector(connector);
524 struct drm_device *dev = connector->dev;
525
526 if (property == dev->mode_config.scaling_mode_property) {
527 struct drm_crtc *crtc;
528
529 if (value == DRM_MODE_SCALE_NONE) {
530 DRM_DEBUG_KMS("no scaling not supported\n");
531 return -EINVAL;
532 }
533
534 if (intel_connector->panel.fitting_mode == value) {
535 /* the LVDS scaling property is not changed */
536 return 0;
537 }
538 intel_connector->panel.fitting_mode = value;
539
540 crtc = intel_attached_encoder(connector)->base.crtc;
541 if (crtc && crtc->state->enable) {
542 /*
543 * If the CRTC is enabled, the display will be changed
544 * according to the new panel fitting mode.
545 */
546 intel_crtc_restore_mode(crtc);
547 }
548 }
549
550 return 0;
551}
552
553static const struct drm_connector_helper_funcs intel_lvds_connector_helper_funcs = {
554 .get_modes = intel_lvds_get_modes,
555 .mode_valid = intel_lvds_mode_valid,
556 .best_encoder = intel_best_encoder,
557};
558
559static const struct drm_connector_funcs intel_lvds_connector_funcs = {
560 .dpms = drm_atomic_helper_connector_dpms,
561 .detect = intel_lvds_detect,
562 .fill_modes = drm_helper_probe_single_connector_modes,
563 .set_property = intel_lvds_set_property,
564 .atomic_get_property = intel_connector_atomic_get_property,
565 .destroy = intel_lvds_destroy,
566 .atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
567 .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
568};
569
570static const struct drm_encoder_funcs intel_lvds_enc_funcs = {
571 .destroy = intel_encoder_destroy,
572};
573
574static int intel_no_lvds_dmi_callback(const struct dmi_system_id *id)
575{
576 DRM_INFO("Skipping LVDS initialization for %s\n", id->ident);
577 return 1;
578}
579
580/* These systems claim to have LVDS, but really don't */
581static const struct dmi_system_id intel_no_lvds[] = {
582 {
583 .callback = intel_no_lvds_dmi_callback,
584 .ident = "Apple Mac Mini (Core series)",
585 .matches = {
586 DMI_MATCH(DMI_SYS_VENDOR, "Apple"),
587 DMI_MATCH(DMI_PRODUCT_NAME, "Macmini1,1"),
588 },
589 },
590 {
591 .callback = intel_no_lvds_dmi_callback,
592 .ident = "Apple Mac Mini (Core 2 series)",
593 .matches = {
594 DMI_MATCH(DMI_SYS_VENDOR, "Apple"),
595 DMI_MATCH(DMI_PRODUCT_NAME, "Macmini2,1"),
596 },
597 },
598 {
599 .callback = intel_no_lvds_dmi_callback,
600 .ident = "MSI IM-945GSE-A",
601 .matches = {
602 DMI_MATCH(DMI_SYS_VENDOR, "MSI"),
603 DMI_MATCH(DMI_PRODUCT_NAME, "A9830IMS"),
604 },
605 },
606 {
607 .callback = intel_no_lvds_dmi_callback,
608 .ident = "Dell Studio Hybrid",
609 .matches = {
610 DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
611 DMI_MATCH(DMI_PRODUCT_NAME, "Studio Hybrid 140g"),
612 },
613 },
614 {
615 .callback = intel_no_lvds_dmi_callback,
616 .ident = "Dell OptiPlex FX170",
617 .matches = {
618 DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
619 DMI_MATCH(DMI_PRODUCT_NAME, "OptiPlex FX170"),
620 },
621 },
622 {
623 .callback = intel_no_lvds_dmi_callback,
624 .ident = "AOpen Mini PC",
625 .matches = {
626 DMI_MATCH(DMI_SYS_VENDOR, "AOpen"),
627 DMI_MATCH(DMI_PRODUCT_NAME, "i965GMx-IF"),
628 },
629 },
630 {
631 .callback = intel_no_lvds_dmi_callback,
632 .ident = "AOpen Mini PC MP915",
633 .matches = {
634 DMI_MATCH(DMI_BOARD_VENDOR, "AOpen"),
635 DMI_MATCH(DMI_BOARD_NAME, "i915GMx-F"),
636 },
637 },
638 {
639 .callback = intel_no_lvds_dmi_callback,
640 .ident = "AOpen i915GMm-HFS",
641 .matches = {
642 DMI_MATCH(DMI_BOARD_VENDOR, "AOpen"),
643 DMI_MATCH(DMI_BOARD_NAME, "i915GMm-HFS"),
644 },
645 },
646 {
647 .callback = intel_no_lvds_dmi_callback,
648 .ident = "AOpen i45GMx-I",
649 .matches = {
650 DMI_MATCH(DMI_BOARD_VENDOR, "AOpen"),
651 DMI_MATCH(DMI_BOARD_NAME, "i45GMx-I"),
652 },
653 },
654 {
655 .callback = intel_no_lvds_dmi_callback,
656 .ident = "Aopen i945GTt-VFA",
657 .matches = {
658 DMI_MATCH(DMI_PRODUCT_VERSION, "AO00001JW"),
659 },
660 },
661 {
662 .callback = intel_no_lvds_dmi_callback,
663 .ident = "Clientron U800",
664 .matches = {
665 DMI_MATCH(DMI_SYS_VENDOR, "Clientron"),
666 DMI_MATCH(DMI_PRODUCT_NAME, "U800"),
667 },
668 },
669 {
670 .callback = intel_no_lvds_dmi_callback,
671 .ident = "Clientron E830",
672 .matches = {
673 DMI_MATCH(DMI_SYS_VENDOR, "Clientron"),
674 DMI_MATCH(DMI_PRODUCT_NAME, "E830"),
675 },
676 },
677 {
678 .callback = intel_no_lvds_dmi_callback,
679 .ident = "Asus EeeBox PC EB1007",
680 .matches = {
681 DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK Computer INC."),
682 DMI_MATCH(DMI_PRODUCT_NAME, "EB1007"),
683 },
684 },
685 {
686 .callback = intel_no_lvds_dmi_callback,
687 .ident = "Asus AT5NM10T-I",
688 .matches = {
689 DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."),
690 DMI_MATCH(DMI_BOARD_NAME, "AT5NM10T-I"),
691 },
692 },
693 {
694 .callback = intel_no_lvds_dmi_callback,
695 .ident = "Hewlett-Packard HP t5740",
696 .matches = {
697 DMI_MATCH(DMI_BOARD_VENDOR, "Hewlett-Packard"),
698 DMI_MATCH(DMI_PRODUCT_NAME, " t5740"),
699 },
700 },
701 {
702 .callback = intel_no_lvds_dmi_callback,
703 .ident = "Hewlett-Packard t5745",
704 .matches = {
705 DMI_MATCH(DMI_BOARD_VENDOR, "Hewlett-Packard"),
706 DMI_MATCH(DMI_PRODUCT_NAME, "hp t5745"),
707 },
708 },
709 {
710 .callback = intel_no_lvds_dmi_callback,
711 .ident = "Hewlett-Packard st5747",
712 .matches = {
713 DMI_MATCH(DMI_BOARD_VENDOR, "Hewlett-Packard"),
714 DMI_MATCH(DMI_PRODUCT_NAME, "hp st5747"),
715 },
716 },
717 {
718 .callback = intel_no_lvds_dmi_callback,
719 .ident = "MSI Wind Box DC500",
720 .matches = {
721 DMI_MATCH(DMI_BOARD_VENDOR, "MICRO-STAR INTERNATIONAL CO., LTD"),
722 DMI_MATCH(DMI_BOARD_NAME, "MS-7469"),
723 },
724 },
725 {
726 .callback = intel_no_lvds_dmi_callback,
727 .ident = "Gigabyte GA-D525TUD",
728 .matches = {
729 DMI_MATCH(DMI_BOARD_VENDOR, "Gigabyte Technology Co., Ltd."),
730 DMI_MATCH(DMI_BOARD_NAME, "D525TUD"),
731 },
732 },
733 {
734 .callback = intel_no_lvds_dmi_callback,
735 .ident = "Supermicro X7SPA-H",
736 .matches = {
737 DMI_MATCH(DMI_SYS_VENDOR, "Supermicro"),
738 DMI_MATCH(DMI_PRODUCT_NAME, "X7SPA-H"),
739 },
740 },
741 {
742 .callback = intel_no_lvds_dmi_callback,
743 .ident = "Fujitsu Esprimo Q900",
744 .matches = {
745 DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU"),
746 DMI_MATCH(DMI_PRODUCT_NAME, "ESPRIMO Q900"),
747 },
748 },
749 {
750 .callback = intel_no_lvds_dmi_callback,
751 .ident = "Intel D410PT",
752 .matches = {
753 DMI_MATCH(DMI_BOARD_VENDOR, "Intel"),
754 DMI_MATCH(DMI_BOARD_NAME, "D410PT"),
755 },
756 },
757 {
758 .callback = intel_no_lvds_dmi_callback,
759 .ident = "Intel D425KT",
760 .matches = {
761 DMI_MATCH(DMI_BOARD_VENDOR, "Intel"),
762 DMI_EXACT_MATCH(DMI_BOARD_NAME, "D425KT"),
763 },
764 },
765 {
766 .callback = intel_no_lvds_dmi_callback,
767 .ident = "Intel D510MO",
768 .matches = {
769 DMI_MATCH(DMI_BOARD_VENDOR, "Intel"),
770 DMI_EXACT_MATCH(DMI_BOARD_NAME, "D510MO"),
771 },
772 },
773 {
774 .callback = intel_no_lvds_dmi_callback,
775 .ident = "Intel D525MW",
776 .matches = {
777 DMI_MATCH(DMI_BOARD_VENDOR, "Intel"),
778 DMI_EXACT_MATCH(DMI_BOARD_NAME, "D525MW"),
779 },
780 },
781
782 { } /* terminating entry */
783};
784
785/*
786 * Enumerate the child dev array parsed from VBT to check whether
787 * the LVDS is present.
788 * If it is present, return 1.
789 * If it is not present, return false.
790 * If no child dev is parsed from VBT, it assumes that the LVDS is present.
791 */
792static bool lvds_is_present_in_vbt(struct drm_device *dev,
793 u8 *i2c_pin)
794{
795 struct drm_i915_private *dev_priv = dev->dev_private;
796 int i;
797
798 if (!dev_priv->vbt.child_dev_num)
799 return true;
800
801 for (i = 0; i < dev_priv->vbt.child_dev_num; i++) {
802 union child_device_config *uchild = dev_priv->vbt.child_dev + i;
803 struct old_child_dev_config *child = &uchild->old;
804
805 /* If the device type is not LFP, continue.
806 * We have to check both the new identifiers as well as the
807 * old for compatibility with some BIOSes.
808 */
809 if (child->device_type != DEVICE_TYPE_INT_LFP &&
810 child->device_type != DEVICE_TYPE_LFP)
811 continue;
812
813 if (intel_gmbus_is_valid_pin(dev_priv, child->i2c_pin))
814 *i2c_pin = child->i2c_pin;
815
816 /* However, we cannot trust the BIOS writers to populate
817 * the VBT correctly. Since LVDS requires additional
818 * information from AIM blocks, a non-zero addin offset is
819 * a good indicator that the LVDS is actually present.
820 */
821 if (child->addin_offset)
822 return true;
823
824 /* But even then some BIOS writers perform some black magic
825 * and instantiate the device without reference to any
826 * additional data. Trust that if the VBT was written into
827 * the OpRegion then they have validated the LVDS's existence.
828 */
829 if (dev_priv->opregion.vbt)
830 return true;
831 }
832
833 return false;
834}
835
836static int intel_dual_link_lvds_callback(const struct dmi_system_id *id)
837{
838 DRM_INFO("Forcing lvds to dual link mode on %s\n", id->ident);
839 return 1;
840}
841
842static const struct dmi_system_id intel_dual_link_lvds[] = {
843 {
844 .callback = intel_dual_link_lvds_callback,
845 .ident = "Apple MacBook Pro 15\" (2010)",
846 .matches = {
847 DMI_MATCH(DMI_SYS_VENDOR, "Apple Inc."),
848 DMI_MATCH(DMI_PRODUCT_NAME, "MacBookPro6,2"),
849 },
850 },
851 {
852 .callback = intel_dual_link_lvds_callback,
853 .ident = "Apple MacBook Pro 15\" (2011)",
854 .matches = {
855 DMI_MATCH(DMI_SYS_VENDOR, "Apple Inc."),
856 DMI_MATCH(DMI_PRODUCT_NAME, "MacBookPro8,2"),
857 },
858 },
859 {
860 .callback = intel_dual_link_lvds_callback,
861 .ident = "Apple MacBook Pro 15\" (2012)",
862 .matches = {
863 DMI_MATCH(DMI_SYS_VENDOR, "Apple Inc."),
864 DMI_MATCH(DMI_PRODUCT_NAME, "MacBookPro9,1"),
865 },
866 },
867 { } /* terminating entry */
868};
869
870bool intel_is_dual_link_lvds(struct drm_device *dev)
871{
872 struct intel_encoder *encoder;
873 struct intel_lvds_encoder *lvds_encoder;
874
875 for_each_intel_encoder(dev, encoder) {
876 if (encoder->type == INTEL_OUTPUT_LVDS) {
877 lvds_encoder = to_lvds_encoder(&encoder->base);
878
879 return lvds_encoder->is_dual_link;
880 }
881 }
882
883 return false;
884}
885
886static bool compute_is_dual_link_lvds(struct intel_lvds_encoder *lvds_encoder)
887{
888 struct drm_device *dev = lvds_encoder->base.base.dev;
889 unsigned int val;
890 struct drm_i915_private *dev_priv = dev->dev_private;
891
892 /* use the module option value if specified */
893 if (i915.lvds_channel_mode > 0)
894 return i915.lvds_channel_mode == 2;
895
896 /* single channel LVDS is limited to 112 MHz */
897 if (lvds_encoder->attached_connector->base.panel.fixed_mode->clock
898 > 112999)
899 return true;
900
901 if (dmi_check_system(intel_dual_link_lvds))
902 return true;
903
904 /* BIOS should set the proper LVDS register value at boot, but
905 * in reality, it doesn't set the value when the lid is closed;
906 * we need to check "the value to be set" in VBT when LVDS
907 * register is uninitialized.
908 */
909 val = I915_READ(lvds_encoder->reg);
910 if (!(val & ~(LVDS_PIPE_MASK | LVDS_DETECTED)))
911 val = dev_priv->vbt.bios_lvds_val;
912
913 return (val & LVDS_CLKB_POWER_MASK) == LVDS_CLKB_POWER_UP;
914}
915
916static bool intel_lvds_supported(struct drm_device *dev)
917{
918 /* With the introduction of the PCH we gained a dedicated
919 * LVDS presence pin, use it. */
920 if (HAS_PCH_IBX(dev) || HAS_PCH_CPT(dev))
921 return true;
922
923 /* Otherwise LVDS was only attached to mobile products,
924 * except for the inglorious 830gm */
925 if (INTEL_INFO(dev)->gen <= 4 && IS_MOBILE(dev) && !IS_I830(dev))
926 return true;
927
928 return false;
929}
930
931/**
932 * intel_lvds_init - setup LVDS connectors on this device
933 * @dev: drm device
934 *
935 * Create the connector, register the LVDS DDC bus, and try to figure out what
936 * modes we can display on the LVDS panel (if present).
937 */
938void intel_lvds_init(struct drm_device *dev)
939{
940 struct drm_i915_private *dev_priv = dev->dev_private;
941 struct intel_lvds_encoder *lvds_encoder;
942 struct intel_encoder *intel_encoder;
943 struct intel_lvds_connector *lvds_connector;
944 struct intel_connector *intel_connector;
945 struct drm_connector *connector;
946 struct drm_encoder *encoder;
947 struct drm_display_mode *scan; /* *modes, *bios_mode; */
948 struct drm_display_mode *fixed_mode = NULL;
949 struct drm_display_mode *downclock_mode = NULL;
950 struct edid *edid;
951 struct drm_crtc *crtc;
952 i915_reg_t lvds_reg;
953 u32 lvds;
954 int pipe;
955 u8 pin;
956
957 /*
958 * Unlock registers and just leave them unlocked. Do this before
959 * checking quirk lists to avoid bogus WARNINGs.
960 */
961 if (HAS_PCH_SPLIT(dev)) {
962 I915_WRITE(PCH_PP_CONTROL,
963 I915_READ(PCH_PP_CONTROL) | PANEL_UNLOCK_REGS);
964 } else if (INTEL_INFO(dev_priv)->gen < 5) {
965 I915_WRITE(PP_CONTROL,
966 I915_READ(PP_CONTROL) | PANEL_UNLOCK_REGS);
967 }
968 if (!intel_lvds_supported(dev))
969 return;
970
971 /* Skip init on machines we know falsely report LVDS */
972 if (dmi_check_system(intel_no_lvds))
973 return;
974
975 if (HAS_PCH_SPLIT(dev))
976 lvds_reg = PCH_LVDS;
977 else
978 lvds_reg = LVDS;
979
980 lvds = I915_READ(lvds_reg);
981
982 if (HAS_PCH_SPLIT(dev)) {
983 if ((lvds & LVDS_DETECTED) == 0)
984 return;
985 if (dev_priv->vbt.edp_support) {
986 DRM_DEBUG_KMS("disable LVDS for eDP support\n");
987 return;
988 }
989 }
990
991 pin = GMBUS_PIN_PANEL;
992 if (!lvds_is_present_in_vbt(dev, &pin)) {
993 if ((lvds & LVDS_PORT_EN) == 0) {
994 DRM_DEBUG_KMS("LVDS is not present in VBT\n");
995 return;
996 }
997 DRM_DEBUG_KMS("LVDS is not present in VBT, but enabled anyway\n");
998 }
999
1000 /* Set the Panel Power On/Off timings if uninitialized. */
1001 if (INTEL_INFO(dev_priv)->gen < 5 &&
1002 I915_READ(PP_ON_DELAYS) == 0 && I915_READ(PP_OFF_DELAYS) == 0) {
1003 /* Set T2 to 40ms and T5 to 200ms */
1004 I915_WRITE(PP_ON_DELAYS, 0x019007d0);
1005
1006 /* Set T3 to 35ms and Tx to 200ms */
1007 I915_WRITE(PP_OFF_DELAYS, 0x015e07d0);
1008
1009 DRM_DEBUG_KMS("Panel power timings uninitialized, setting defaults\n");
1010 }
1011
1012 lvds_encoder = kzalloc(sizeof(*lvds_encoder), GFP_KERNEL);
1013 if (!lvds_encoder)
1014 return;
1015
1016 lvds_connector = kzalloc(sizeof(*lvds_connector), GFP_KERNEL);
1017 if (!lvds_connector) {
1018 kfree(lvds_encoder);
1019 return;
1020 }
1021
1022 if (intel_connector_init(&lvds_connector->base) < 0) {
1023 kfree(lvds_connector);
1024 kfree(lvds_encoder);
1025 return;
1026 }
1027
1028 lvds_encoder->attached_connector = lvds_connector;
1029
1030 intel_encoder = &lvds_encoder->base;
1031 encoder = &intel_encoder->base;
1032 intel_connector = &lvds_connector->base;
1033 connector = &intel_connector->base;
1034 drm_connector_init(dev, &intel_connector->base, &intel_lvds_connector_funcs,
1035 DRM_MODE_CONNECTOR_LVDS);
1036
1037 drm_encoder_init(dev, &intel_encoder->base, &intel_lvds_enc_funcs,
1038 DRM_MODE_ENCODER_LVDS, NULL);
1039
1040 intel_encoder->enable = intel_enable_lvds;
1041 intel_encoder->pre_enable = intel_pre_enable_lvds;
1042 intel_encoder->compute_config = intel_lvds_compute_config;
1043 if (HAS_PCH_SPLIT(dev_priv)) {
1044 intel_encoder->disable = pch_disable_lvds;
1045 intel_encoder->post_disable = pch_post_disable_lvds;
1046 } else {
1047 intel_encoder->disable = gmch_disable_lvds;
1048 }
1049 intel_encoder->get_hw_state = intel_lvds_get_hw_state;
1050 intel_encoder->get_config = intel_lvds_get_config;
1051 intel_connector->get_hw_state = intel_connector_get_hw_state;
1052 intel_connector->unregister = intel_connector_unregister;
1053
1054 intel_connector_attach_encoder(intel_connector, intel_encoder);
1055 intel_encoder->type = INTEL_OUTPUT_LVDS;
1056
1057 intel_encoder->cloneable = 0;
1058 if (HAS_PCH_SPLIT(dev))
1059 intel_encoder->crtc_mask = (1 << 0) | (1 << 1) | (1 << 2);
1060 else if (IS_GEN4(dev))
1061 intel_encoder->crtc_mask = (1 << 0) | (1 << 1);
1062 else
1063 intel_encoder->crtc_mask = (1 << 1);
1064
1065 drm_connector_helper_add(connector, &intel_lvds_connector_helper_funcs);
1066 connector->display_info.subpixel_order = SubPixelHorizontalRGB;
1067 connector->interlace_allowed = false;
1068 connector->doublescan_allowed = false;
1069
1070 lvds_encoder->reg = lvds_reg;
1071
1072 /* create the scaling mode property */
1073 drm_mode_create_scaling_mode_property(dev);
1074 drm_object_attach_property(&connector->base,
1075 dev->mode_config.scaling_mode_property,
1076 DRM_MODE_SCALE_ASPECT);
1077 intel_connector->panel.fitting_mode = DRM_MODE_SCALE_ASPECT;
1078 /*
1079 * LVDS discovery:
1080 * 1) check for EDID on DDC
1081 * 2) check for VBT data
1082 * 3) check to see if LVDS is already on
1083 * if none of the above, no panel
1084 * 4) make sure lid is open
1085 * if closed, act like it's not there for now
1086 */
1087
1088 /*
1089 * Attempt to get the fixed panel mode from DDC. Assume that the
1090 * preferred mode is the right one.
1091 */
1092 mutex_lock(&dev->mode_config.mutex);
1093 if (vga_switcheroo_handler_flags() & VGA_SWITCHEROO_CAN_SWITCH_DDC)
1094 edid = drm_get_edid_switcheroo(connector,
1095 intel_gmbus_get_adapter(dev_priv, pin));
1096 else
1097 edid = drm_get_edid(connector,
1098 intel_gmbus_get_adapter(dev_priv, pin));
1099 if (edid) {
1100 if (drm_add_edid_modes(connector, edid)) {
1101 drm_mode_connector_update_edid_property(connector,
1102 edid);
1103 } else {
1104 kfree(edid);
1105 edid = ERR_PTR(-EINVAL);
1106 }
1107 } else {
1108 edid = ERR_PTR(-ENOENT);
1109 }
1110 lvds_connector->base.edid = edid;
1111
1112 if (IS_ERR_OR_NULL(edid)) {
1113 /* Didn't get an EDID, so
1114 * Set wide sync ranges so we get all modes
1115 * handed to valid_mode for checking
1116 */
1117 connector->display_info.min_vfreq = 0;
1118 connector->display_info.max_vfreq = 200;
1119 connector->display_info.min_hfreq = 0;
1120 connector->display_info.max_hfreq = 200;
1121 }
1122
1123 list_for_each_entry(scan, &connector->probed_modes, head) {
1124 if (scan->type & DRM_MODE_TYPE_PREFERRED) {
1125 DRM_DEBUG_KMS("using preferred mode from EDID: ");
1126 drm_mode_debug_printmodeline(scan);
1127
1128 fixed_mode = drm_mode_duplicate(dev, scan);
1129 if (fixed_mode)
1130 goto out;
1131 }
1132 }
1133
1134 /* Failed to get EDID, what about VBT? */
1135 if (dev_priv->vbt.lfp_lvds_vbt_mode) {
1136 DRM_DEBUG_KMS("using mode from VBT: ");
1137 drm_mode_debug_printmodeline(dev_priv->vbt.lfp_lvds_vbt_mode);
1138
1139 fixed_mode = drm_mode_duplicate(dev, dev_priv->vbt.lfp_lvds_vbt_mode);
1140 if (fixed_mode) {
1141 fixed_mode->type |= DRM_MODE_TYPE_PREFERRED;
1142 goto out;
1143 }
1144 }
1145
1146 /*
1147 * If we didn't get EDID, try checking if the panel is already turned
1148 * on. If so, assume that whatever is currently programmed is the
1149 * correct mode.
1150 */
1151
1152 /* Ironlake: FIXME if still fail, not try pipe mode now */
1153 if (HAS_PCH_SPLIT(dev))
1154 goto failed;
1155
1156 pipe = (lvds & LVDS_PIPEB_SELECT) ? 1 : 0;
1157 crtc = intel_get_crtc_for_pipe(dev, pipe);
1158
1159 if (crtc && (lvds & LVDS_PORT_EN)) {
1160 fixed_mode = intel_crtc_mode_get(dev, crtc);
1161 if (fixed_mode) {
1162 DRM_DEBUG_KMS("using current (BIOS) mode: ");
1163 drm_mode_debug_printmodeline(fixed_mode);
1164 fixed_mode->type |= DRM_MODE_TYPE_PREFERRED;
1165 goto out;
1166 }
1167 }
1168
1169 /* If we still don't have a mode after all that, give up. */
1170 if (!fixed_mode)
1171 goto failed;
1172
1173out:
1174 mutex_unlock(&dev->mode_config.mutex);
1175
1176 intel_panel_init(&intel_connector->panel, fixed_mode, downclock_mode);
1177
1178 lvds_encoder->is_dual_link = compute_is_dual_link_lvds(lvds_encoder);
1179 DRM_DEBUG_KMS("detected %s-link lvds configuration\n",
1180 lvds_encoder->is_dual_link ? "dual" : "single");
1181
1182 lvds_encoder->a3_power = lvds & LVDS_A3_POWER_MASK;
1183
1184 lvds_connector->lid_notifier.notifier_call = intel_lid_notify;
1185 if (acpi_lid_notifier_register(&lvds_connector->lid_notifier)) {
1186 DRM_DEBUG_KMS("lid notifier registration failed\n");
1187 lvds_connector->lid_notifier.notifier_call = NULL;
1188 }
1189 drm_connector_register(connector);
1190
1191 intel_panel_setup_backlight(connector, INVALID_PIPE);
1192
1193 return;
1194
1195failed:
1196 mutex_unlock(&dev->mode_config.mutex);
1197
1198 DRM_DEBUG_KMS("No LVDS modes found, disabling.\n");
1199 drm_connector_cleanup(connector);
1200 drm_encoder_cleanup(encoder);
1201 kfree(lvds_encoder);
1202 kfree(lvds_connector);
1203 return;
1204}
1/*
2 * Copyright © 2006-2007 Intel Corporation
3 * Copyright (c) 2006 Dave Airlie <airlied@linux.ie>
4 *
5 * Permission is hereby granted, free of charge, to any person obtaining a
6 * copy of this software and associated documentation files (the "Software"),
7 * to deal in the Software without restriction, including without limitation
8 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
9 * and/or sell copies of the Software, and to permit persons to whom the
10 * Software is furnished to do so, subject to the following conditions:
11 *
12 * The above copyright notice and this permission notice (including the next
13 * paragraph) shall be included in all copies or substantial portions of the
14 * Software.
15 *
16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
19 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
20 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
21 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
22 * DEALINGS IN THE SOFTWARE.
23 *
24 * Authors:
25 * Eric Anholt <eric@anholt.net>
26 * Dave Airlie <airlied@linux.ie>
27 * Jesse Barnes <jesse.barnes@intel.com>
28 */
29
30#include <acpi/button.h>
31#include <linux/dmi.h>
32#include <linux/i2c.h>
33#include <linux/slab.h>
34#include <drm/drmP.h>
35#include <drm/drm_crtc.h>
36#include <drm/drm_edid.h>
37#include "intel_drv.h"
38#include <drm/i915_drm.h>
39#include "i915_drv.h"
40#include <linux/acpi.h>
41
42/* Private structure for the integrated LVDS support */
43struct intel_lvds_connector {
44 struct intel_connector base;
45
46 struct notifier_block lid_notifier;
47};
48
49struct intel_lvds_encoder {
50 struct intel_encoder base;
51
52 bool is_dual_link;
53 u32 reg;
54
55 struct intel_lvds_connector *attached_connector;
56};
57
58static struct intel_lvds_encoder *to_lvds_encoder(struct drm_encoder *encoder)
59{
60 return container_of(encoder, struct intel_lvds_encoder, base.base);
61}
62
63static struct intel_lvds_connector *to_lvds_connector(struct drm_connector *connector)
64{
65 return container_of(connector, struct intel_lvds_connector, base.base);
66}
67
68static bool intel_lvds_get_hw_state(struct intel_encoder *encoder,
69 enum pipe *pipe)
70{
71 struct drm_device *dev = encoder->base.dev;
72 struct drm_i915_private *dev_priv = dev->dev_private;
73 struct intel_lvds_encoder *lvds_encoder = to_lvds_encoder(&encoder->base);
74 u32 tmp;
75
76 tmp = I915_READ(lvds_encoder->reg);
77
78 if (!(tmp & LVDS_PORT_EN))
79 return false;
80
81 if (HAS_PCH_CPT(dev))
82 *pipe = PORT_TO_PIPE_CPT(tmp);
83 else
84 *pipe = PORT_TO_PIPE(tmp);
85
86 return true;
87}
88
89static void intel_lvds_get_config(struct intel_encoder *encoder,
90 struct intel_crtc_config *pipe_config)
91{
92 struct drm_device *dev = encoder->base.dev;
93 struct drm_i915_private *dev_priv = dev->dev_private;
94 u32 lvds_reg, tmp, flags = 0;
95 int dotclock;
96
97 if (HAS_PCH_SPLIT(dev))
98 lvds_reg = PCH_LVDS;
99 else
100 lvds_reg = LVDS;
101
102 tmp = I915_READ(lvds_reg);
103 if (tmp & LVDS_HSYNC_POLARITY)
104 flags |= DRM_MODE_FLAG_NHSYNC;
105 else
106 flags |= DRM_MODE_FLAG_PHSYNC;
107 if (tmp & LVDS_VSYNC_POLARITY)
108 flags |= DRM_MODE_FLAG_NVSYNC;
109 else
110 flags |= DRM_MODE_FLAG_PVSYNC;
111
112 pipe_config->adjusted_mode.flags |= flags;
113
114 /* gen2/3 store dither state in pfit control, needs to match */
115 if (INTEL_INFO(dev)->gen < 4) {
116 tmp = I915_READ(PFIT_CONTROL);
117
118 pipe_config->gmch_pfit.control |= tmp & PANEL_8TO6_DITHER_ENABLE;
119 }
120
121 dotclock = pipe_config->port_clock;
122
123 if (HAS_PCH_SPLIT(dev_priv->dev))
124 ironlake_check_encoder_dotclock(pipe_config, dotclock);
125
126 pipe_config->adjusted_mode.crtc_clock = dotclock;
127}
128
129/* The LVDS pin pair needs to be on before the DPLLs are enabled.
130 * This is an exception to the general rule that mode_set doesn't turn
131 * things on.
132 */
133static void intel_pre_enable_lvds(struct intel_encoder *encoder)
134{
135 struct intel_lvds_encoder *lvds_encoder = to_lvds_encoder(&encoder->base);
136 struct drm_device *dev = encoder->base.dev;
137 struct drm_i915_private *dev_priv = dev->dev_private;
138 struct intel_crtc *crtc = to_intel_crtc(encoder->base.crtc);
139 const struct drm_display_mode *adjusted_mode =
140 &crtc->config.adjusted_mode;
141 int pipe = crtc->pipe;
142 u32 temp;
143
144 if (HAS_PCH_SPLIT(dev)) {
145 assert_fdi_rx_pll_disabled(dev_priv, pipe);
146 assert_shared_dpll_disabled(dev_priv,
147 intel_crtc_to_shared_dpll(crtc));
148 } else {
149 assert_pll_disabled(dev_priv, pipe);
150 }
151
152 temp = I915_READ(lvds_encoder->reg);
153 temp |= LVDS_PORT_EN | LVDS_A0A2_CLKA_POWER_UP;
154
155 if (HAS_PCH_CPT(dev)) {
156 temp &= ~PORT_TRANS_SEL_MASK;
157 temp |= PORT_TRANS_SEL_CPT(pipe);
158 } else {
159 if (pipe == 1) {
160 temp |= LVDS_PIPEB_SELECT;
161 } else {
162 temp &= ~LVDS_PIPEB_SELECT;
163 }
164 }
165
166 /* set the corresponsding LVDS_BORDER bit */
167 temp &= ~LVDS_BORDER_ENABLE;
168 temp |= crtc->config.gmch_pfit.lvds_border_bits;
169 /* Set the B0-B3 data pairs corresponding to whether we're going to
170 * set the DPLLs for dual-channel mode or not.
171 */
172 if (lvds_encoder->is_dual_link)
173 temp |= LVDS_B0B3_POWER_UP | LVDS_CLKB_POWER_UP;
174 else
175 temp &= ~(LVDS_B0B3_POWER_UP | LVDS_CLKB_POWER_UP);
176
177 /* It would be nice to set 24 vs 18-bit mode (LVDS_A3_POWER_UP)
178 * appropriately here, but we need to look more thoroughly into how
179 * panels behave in the two modes.
180 */
181
182 /* Set the dithering flag on LVDS as needed, note that there is no
183 * special lvds dither control bit on pch-split platforms, dithering is
184 * only controlled through the PIPECONF reg. */
185 if (INTEL_INFO(dev)->gen == 4) {
186 /* Bspec wording suggests that LVDS port dithering only exists
187 * for 18bpp panels. */
188 if (crtc->config.dither && crtc->config.pipe_bpp == 18)
189 temp |= LVDS_ENABLE_DITHER;
190 else
191 temp &= ~LVDS_ENABLE_DITHER;
192 }
193 temp &= ~(LVDS_HSYNC_POLARITY | LVDS_VSYNC_POLARITY);
194 if (adjusted_mode->flags & DRM_MODE_FLAG_NHSYNC)
195 temp |= LVDS_HSYNC_POLARITY;
196 if (adjusted_mode->flags & DRM_MODE_FLAG_NVSYNC)
197 temp |= LVDS_VSYNC_POLARITY;
198
199 I915_WRITE(lvds_encoder->reg, temp);
200}
201
202/**
203 * Sets the power state for the panel.
204 */
205static void intel_enable_lvds(struct intel_encoder *encoder)
206{
207 struct drm_device *dev = encoder->base.dev;
208 struct intel_lvds_encoder *lvds_encoder = to_lvds_encoder(&encoder->base);
209 struct intel_connector *intel_connector =
210 &lvds_encoder->attached_connector->base;
211 struct drm_i915_private *dev_priv = dev->dev_private;
212 u32 ctl_reg, stat_reg;
213
214 if (HAS_PCH_SPLIT(dev)) {
215 ctl_reg = PCH_PP_CONTROL;
216 stat_reg = PCH_PP_STATUS;
217 } else {
218 ctl_reg = PP_CONTROL;
219 stat_reg = PP_STATUS;
220 }
221
222 I915_WRITE(lvds_encoder->reg, I915_READ(lvds_encoder->reg) | LVDS_PORT_EN);
223
224 I915_WRITE(ctl_reg, I915_READ(ctl_reg) | POWER_TARGET_ON);
225 POSTING_READ(lvds_encoder->reg);
226 if (wait_for((I915_READ(stat_reg) & PP_ON) != 0, 1000))
227 DRM_ERROR("timed out waiting for panel to power on\n");
228
229 intel_panel_enable_backlight(intel_connector);
230}
231
232static void intel_disable_lvds(struct intel_encoder *encoder)
233{
234 struct drm_device *dev = encoder->base.dev;
235 struct intel_lvds_encoder *lvds_encoder = to_lvds_encoder(&encoder->base);
236 struct intel_connector *intel_connector =
237 &lvds_encoder->attached_connector->base;
238 struct drm_i915_private *dev_priv = dev->dev_private;
239 u32 ctl_reg, stat_reg;
240
241 if (HAS_PCH_SPLIT(dev)) {
242 ctl_reg = PCH_PP_CONTROL;
243 stat_reg = PCH_PP_STATUS;
244 } else {
245 ctl_reg = PP_CONTROL;
246 stat_reg = PP_STATUS;
247 }
248
249 intel_panel_disable_backlight(intel_connector);
250
251 I915_WRITE(ctl_reg, I915_READ(ctl_reg) & ~POWER_TARGET_ON);
252 if (wait_for((I915_READ(stat_reg) & PP_ON) == 0, 1000))
253 DRM_ERROR("timed out waiting for panel to power off\n");
254
255 I915_WRITE(lvds_encoder->reg, I915_READ(lvds_encoder->reg) & ~LVDS_PORT_EN);
256 POSTING_READ(lvds_encoder->reg);
257}
258
259static enum drm_mode_status
260intel_lvds_mode_valid(struct drm_connector *connector,
261 struct drm_display_mode *mode)
262{
263 struct intel_connector *intel_connector = to_intel_connector(connector);
264 struct drm_display_mode *fixed_mode = intel_connector->panel.fixed_mode;
265
266 if (mode->hdisplay > fixed_mode->hdisplay)
267 return MODE_PANEL;
268 if (mode->vdisplay > fixed_mode->vdisplay)
269 return MODE_PANEL;
270
271 return MODE_OK;
272}
273
274static bool intel_lvds_compute_config(struct intel_encoder *intel_encoder,
275 struct intel_crtc_config *pipe_config)
276{
277 struct drm_device *dev = intel_encoder->base.dev;
278 struct drm_i915_private *dev_priv = dev->dev_private;
279 struct intel_lvds_encoder *lvds_encoder =
280 to_lvds_encoder(&intel_encoder->base);
281 struct intel_connector *intel_connector =
282 &lvds_encoder->attached_connector->base;
283 struct drm_display_mode *adjusted_mode = &pipe_config->adjusted_mode;
284 struct intel_crtc *intel_crtc = lvds_encoder->base.new_crtc;
285 unsigned int lvds_bpp;
286
287 /* Should never happen!! */
288 if (INTEL_INFO(dev)->gen < 4 && intel_crtc->pipe == 0) {
289 DRM_ERROR("Can't support LVDS on pipe A\n");
290 return false;
291 }
292
293 if ((I915_READ(lvds_encoder->reg) & LVDS_A3_POWER_MASK) ==
294 LVDS_A3_POWER_UP)
295 lvds_bpp = 8*3;
296 else
297 lvds_bpp = 6*3;
298
299 if (lvds_bpp != pipe_config->pipe_bpp && !pipe_config->bw_constrained) {
300 DRM_DEBUG_KMS("forcing display bpp (was %d) to LVDS (%d)\n",
301 pipe_config->pipe_bpp, lvds_bpp);
302 pipe_config->pipe_bpp = lvds_bpp;
303 }
304
305 /*
306 * We have timings from the BIOS for the panel, put them in
307 * to the adjusted mode. The CRTC will be set up for this mode,
308 * with the panel scaling set up to source from the H/VDisplay
309 * of the original mode.
310 */
311 intel_fixed_panel_mode(intel_connector->panel.fixed_mode,
312 adjusted_mode);
313
314 if (HAS_PCH_SPLIT(dev)) {
315 pipe_config->has_pch_encoder = true;
316
317 intel_pch_panel_fitting(intel_crtc, pipe_config,
318 intel_connector->panel.fitting_mode);
319 } else {
320 intel_gmch_panel_fitting(intel_crtc, pipe_config,
321 intel_connector->panel.fitting_mode);
322
323 }
324
325 /*
326 * XXX: It would be nice to support lower refresh rates on the
327 * panels to reduce power consumption, and perhaps match the
328 * user's requested refresh rate.
329 */
330
331 return true;
332}
333
334static void intel_lvds_mode_set(struct intel_encoder *encoder)
335{
336 /*
337 * We don't do anything here, the LVDS port is fully set up in the pre
338 * enable hook - the ordering constraints for enabling the lvds port vs.
339 * enabling the display pll are too strict.
340 */
341}
342
343/**
344 * Detect the LVDS connection.
345 *
346 * Since LVDS doesn't have hotlug, we use the lid as a proxy. Open means
347 * connected and closed means disconnected. We also send hotplug events as
348 * needed, using lid status notification from the input layer.
349 */
350static enum drm_connector_status
351intel_lvds_detect(struct drm_connector *connector, bool force)
352{
353 struct drm_device *dev = connector->dev;
354 enum drm_connector_status status;
355
356 DRM_DEBUG_KMS("[CONNECTOR:%d:%s]\n",
357 connector->base.id, drm_get_connector_name(connector));
358
359 status = intel_panel_detect(dev);
360 if (status != connector_status_unknown)
361 return status;
362
363 return connector_status_connected;
364}
365
366/**
367 * Return the list of DDC modes if available, or the BIOS fixed mode otherwise.
368 */
369static int intel_lvds_get_modes(struct drm_connector *connector)
370{
371 struct intel_lvds_connector *lvds_connector = to_lvds_connector(connector);
372 struct drm_device *dev = connector->dev;
373 struct drm_display_mode *mode;
374
375 /* use cached edid if we have one */
376 if (!IS_ERR_OR_NULL(lvds_connector->base.edid))
377 return drm_add_edid_modes(connector, lvds_connector->base.edid);
378
379 mode = drm_mode_duplicate(dev, lvds_connector->base.panel.fixed_mode);
380 if (mode == NULL)
381 return 0;
382
383 drm_mode_probed_add(connector, mode);
384 return 1;
385}
386
387static int intel_no_modeset_on_lid_dmi_callback(const struct dmi_system_id *id)
388{
389 DRM_INFO("Skipping forced modeset for %s\n", id->ident);
390 return 1;
391}
392
393/* The GPU hangs up on these systems if modeset is performed on LID open */
394static const struct dmi_system_id intel_no_modeset_on_lid[] = {
395 {
396 .callback = intel_no_modeset_on_lid_dmi_callback,
397 .ident = "Toshiba Tecra A11",
398 .matches = {
399 DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
400 DMI_MATCH(DMI_PRODUCT_NAME, "TECRA A11"),
401 },
402 },
403
404 { } /* terminating entry */
405};
406
407/*
408 * Lid events. Note the use of 'modeset':
409 * - we set it to MODESET_ON_LID_OPEN on lid close,
410 * and set it to MODESET_DONE on open
411 * - we use it as a "only once" bit (ie we ignore
412 * duplicate events where it was already properly set)
413 * - the suspend/resume paths will set it to
414 * MODESET_SUSPENDED and ignore the lid open event,
415 * because they restore the mode ("lid open").
416 */
417static int intel_lid_notify(struct notifier_block *nb, unsigned long val,
418 void *unused)
419{
420 struct intel_lvds_connector *lvds_connector =
421 container_of(nb, struct intel_lvds_connector, lid_notifier);
422 struct drm_connector *connector = &lvds_connector->base.base;
423 struct drm_device *dev = connector->dev;
424 struct drm_i915_private *dev_priv = dev->dev_private;
425
426 if (dev->switch_power_state != DRM_SWITCH_POWER_ON)
427 return NOTIFY_OK;
428
429 mutex_lock(&dev_priv->modeset_restore_lock);
430 if (dev_priv->modeset_restore == MODESET_SUSPENDED)
431 goto exit;
432 /*
433 * check and update the status of LVDS connector after receiving
434 * the LID nofication event.
435 */
436 connector->status = connector->funcs->detect(connector, false);
437
438 /* Don't force modeset on machines where it causes a GPU lockup */
439 if (dmi_check_system(intel_no_modeset_on_lid))
440 goto exit;
441 if (!acpi_lid_open()) {
442 /* do modeset on next lid open event */
443 dev_priv->modeset_restore = MODESET_ON_LID_OPEN;
444 goto exit;
445 }
446
447 if (dev_priv->modeset_restore == MODESET_DONE)
448 goto exit;
449
450 /*
451 * Some old platform's BIOS love to wreak havoc while the lid is closed.
452 * We try to detect this here and undo any damage. The split for PCH
453 * platforms is rather conservative and a bit arbitrary expect that on
454 * those platforms VGA disabling requires actual legacy VGA I/O access,
455 * and as part of the cleanup in the hw state restore we also redisable
456 * the vga plane.
457 */
458 if (!HAS_PCH_SPLIT(dev)) {
459 drm_modeset_lock_all(dev);
460 intel_modeset_setup_hw_state(dev, true);
461 drm_modeset_unlock_all(dev);
462 }
463
464 dev_priv->modeset_restore = MODESET_DONE;
465
466exit:
467 mutex_unlock(&dev_priv->modeset_restore_lock);
468 return NOTIFY_OK;
469}
470
471/**
472 * intel_lvds_destroy - unregister and free LVDS structures
473 * @connector: connector to free
474 *
475 * Unregister the DDC bus for this connector then free the driver private
476 * structure.
477 */
478static void intel_lvds_destroy(struct drm_connector *connector)
479{
480 struct intel_lvds_connector *lvds_connector =
481 to_lvds_connector(connector);
482
483 if (lvds_connector->lid_notifier.notifier_call)
484 acpi_lid_notifier_unregister(&lvds_connector->lid_notifier);
485
486 if (!IS_ERR_OR_NULL(lvds_connector->base.edid))
487 kfree(lvds_connector->base.edid);
488
489 intel_panel_fini(&lvds_connector->base.panel);
490
491 drm_connector_cleanup(connector);
492 kfree(connector);
493}
494
495static int intel_lvds_set_property(struct drm_connector *connector,
496 struct drm_property *property,
497 uint64_t value)
498{
499 struct intel_connector *intel_connector = to_intel_connector(connector);
500 struct drm_device *dev = connector->dev;
501
502 if (property == dev->mode_config.scaling_mode_property) {
503 struct drm_crtc *crtc;
504
505 if (value == DRM_MODE_SCALE_NONE) {
506 DRM_DEBUG_KMS("no scaling not supported\n");
507 return -EINVAL;
508 }
509
510 if (intel_connector->panel.fitting_mode == value) {
511 /* the LVDS scaling property is not changed */
512 return 0;
513 }
514 intel_connector->panel.fitting_mode = value;
515
516 crtc = intel_attached_encoder(connector)->base.crtc;
517 if (crtc && crtc->enabled) {
518 /*
519 * If the CRTC is enabled, the display will be changed
520 * according to the new panel fitting mode.
521 */
522 intel_crtc_restore_mode(crtc);
523 }
524 }
525
526 return 0;
527}
528
529static const struct drm_connector_helper_funcs intel_lvds_connector_helper_funcs = {
530 .get_modes = intel_lvds_get_modes,
531 .mode_valid = intel_lvds_mode_valid,
532 .best_encoder = intel_best_encoder,
533};
534
535static const struct drm_connector_funcs intel_lvds_connector_funcs = {
536 .dpms = intel_connector_dpms,
537 .detect = intel_lvds_detect,
538 .fill_modes = drm_helper_probe_single_connector_modes,
539 .set_property = intel_lvds_set_property,
540 .destroy = intel_lvds_destroy,
541};
542
543static const struct drm_encoder_funcs intel_lvds_enc_funcs = {
544 .destroy = intel_encoder_destroy,
545};
546
547static int __init intel_no_lvds_dmi_callback(const struct dmi_system_id *id)
548{
549 DRM_INFO("Skipping LVDS initialization for %s\n", id->ident);
550 return 1;
551}
552
553/* These systems claim to have LVDS, but really don't */
554static const struct dmi_system_id intel_no_lvds[] = {
555 {
556 .callback = intel_no_lvds_dmi_callback,
557 .ident = "Apple Mac Mini (Core series)",
558 .matches = {
559 DMI_MATCH(DMI_SYS_VENDOR, "Apple"),
560 DMI_MATCH(DMI_PRODUCT_NAME, "Macmini1,1"),
561 },
562 },
563 {
564 .callback = intel_no_lvds_dmi_callback,
565 .ident = "Apple Mac Mini (Core 2 series)",
566 .matches = {
567 DMI_MATCH(DMI_SYS_VENDOR, "Apple"),
568 DMI_MATCH(DMI_PRODUCT_NAME, "Macmini2,1"),
569 },
570 },
571 {
572 .callback = intel_no_lvds_dmi_callback,
573 .ident = "MSI IM-945GSE-A",
574 .matches = {
575 DMI_MATCH(DMI_SYS_VENDOR, "MSI"),
576 DMI_MATCH(DMI_PRODUCT_NAME, "A9830IMS"),
577 },
578 },
579 {
580 .callback = intel_no_lvds_dmi_callback,
581 .ident = "Dell Studio Hybrid",
582 .matches = {
583 DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
584 DMI_MATCH(DMI_PRODUCT_NAME, "Studio Hybrid 140g"),
585 },
586 },
587 {
588 .callback = intel_no_lvds_dmi_callback,
589 .ident = "Dell OptiPlex FX170",
590 .matches = {
591 DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
592 DMI_MATCH(DMI_PRODUCT_NAME, "OptiPlex FX170"),
593 },
594 },
595 {
596 .callback = intel_no_lvds_dmi_callback,
597 .ident = "AOpen Mini PC",
598 .matches = {
599 DMI_MATCH(DMI_SYS_VENDOR, "AOpen"),
600 DMI_MATCH(DMI_PRODUCT_NAME, "i965GMx-IF"),
601 },
602 },
603 {
604 .callback = intel_no_lvds_dmi_callback,
605 .ident = "AOpen Mini PC MP915",
606 .matches = {
607 DMI_MATCH(DMI_BOARD_VENDOR, "AOpen"),
608 DMI_MATCH(DMI_BOARD_NAME, "i915GMx-F"),
609 },
610 },
611 {
612 .callback = intel_no_lvds_dmi_callback,
613 .ident = "AOpen i915GMm-HFS",
614 .matches = {
615 DMI_MATCH(DMI_BOARD_VENDOR, "AOpen"),
616 DMI_MATCH(DMI_BOARD_NAME, "i915GMm-HFS"),
617 },
618 },
619 {
620 .callback = intel_no_lvds_dmi_callback,
621 .ident = "AOpen i45GMx-I",
622 .matches = {
623 DMI_MATCH(DMI_BOARD_VENDOR, "AOpen"),
624 DMI_MATCH(DMI_BOARD_NAME, "i45GMx-I"),
625 },
626 },
627 {
628 .callback = intel_no_lvds_dmi_callback,
629 .ident = "Aopen i945GTt-VFA",
630 .matches = {
631 DMI_MATCH(DMI_PRODUCT_VERSION, "AO00001JW"),
632 },
633 },
634 {
635 .callback = intel_no_lvds_dmi_callback,
636 .ident = "Clientron U800",
637 .matches = {
638 DMI_MATCH(DMI_SYS_VENDOR, "Clientron"),
639 DMI_MATCH(DMI_PRODUCT_NAME, "U800"),
640 },
641 },
642 {
643 .callback = intel_no_lvds_dmi_callback,
644 .ident = "Clientron E830",
645 .matches = {
646 DMI_MATCH(DMI_SYS_VENDOR, "Clientron"),
647 DMI_MATCH(DMI_PRODUCT_NAME, "E830"),
648 },
649 },
650 {
651 .callback = intel_no_lvds_dmi_callback,
652 .ident = "Asus EeeBox PC EB1007",
653 .matches = {
654 DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK Computer INC."),
655 DMI_MATCH(DMI_PRODUCT_NAME, "EB1007"),
656 },
657 },
658 {
659 .callback = intel_no_lvds_dmi_callback,
660 .ident = "Asus AT5NM10T-I",
661 .matches = {
662 DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."),
663 DMI_MATCH(DMI_BOARD_NAME, "AT5NM10T-I"),
664 },
665 },
666 {
667 .callback = intel_no_lvds_dmi_callback,
668 .ident = "Hewlett-Packard HP t5740",
669 .matches = {
670 DMI_MATCH(DMI_BOARD_VENDOR, "Hewlett-Packard"),
671 DMI_MATCH(DMI_PRODUCT_NAME, " t5740"),
672 },
673 },
674 {
675 .callback = intel_no_lvds_dmi_callback,
676 .ident = "Hewlett-Packard t5745",
677 .matches = {
678 DMI_MATCH(DMI_BOARD_VENDOR, "Hewlett-Packard"),
679 DMI_MATCH(DMI_PRODUCT_NAME, "hp t5745"),
680 },
681 },
682 {
683 .callback = intel_no_lvds_dmi_callback,
684 .ident = "Hewlett-Packard st5747",
685 .matches = {
686 DMI_MATCH(DMI_BOARD_VENDOR, "Hewlett-Packard"),
687 DMI_MATCH(DMI_PRODUCT_NAME, "hp st5747"),
688 },
689 },
690 {
691 .callback = intel_no_lvds_dmi_callback,
692 .ident = "MSI Wind Box DC500",
693 .matches = {
694 DMI_MATCH(DMI_BOARD_VENDOR, "MICRO-STAR INTERNATIONAL CO., LTD"),
695 DMI_MATCH(DMI_BOARD_NAME, "MS-7469"),
696 },
697 },
698 {
699 .callback = intel_no_lvds_dmi_callback,
700 .ident = "Gigabyte GA-D525TUD",
701 .matches = {
702 DMI_MATCH(DMI_BOARD_VENDOR, "Gigabyte Technology Co., Ltd."),
703 DMI_MATCH(DMI_BOARD_NAME, "D525TUD"),
704 },
705 },
706 {
707 .callback = intel_no_lvds_dmi_callback,
708 .ident = "Supermicro X7SPA-H",
709 .matches = {
710 DMI_MATCH(DMI_SYS_VENDOR, "Supermicro"),
711 DMI_MATCH(DMI_PRODUCT_NAME, "X7SPA-H"),
712 },
713 },
714 {
715 .callback = intel_no_lvds_dmi_callback,
716 .ident = "Fujitsu Esprimo Q900",
717 .matches = {
718 DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU"),
719 DMI_MATCH(DMI_PRODUCT_NAME, "ESPRIMO Q900"),
720 },
721 },
722 {
723 .callback = intel_no_lvds_dmi_callback,
724 .ident = "Intel D410PT",
725 .matches = {
726 DMI_MATCH(DMI_BOARD_VENDOR, "Intel"),
727 DMI_MATCH(DMI_BOARD_NAME, "D410PT"),
728 },
729 },
730 {
731 .callback = intel_no_lvds_dmi_callback,
732 .ident = "Intel D425KT",
733 .matches = {
734 DMI_MATCH(DMI_BOARD_VENDOR, "Intel"),
735 DMI_EXACT_MATCH(DMI_BOARD_NAME, "D425KT"),
736 },
737 },
738 {
739 .callback = intel_no_lvds_dmi_callback,
740 .ident = "Intel D510MO",
741 .matches = {
742 DMI_MATCH(DMI_BOARD_VENDOR, "Intel"),
743 DMI_EXACT_MATCH(DMI_BOARD_NAME, "D510MO"),
744 },
745 },
746 {
747 .callback = intel_no_lvds_dmi_callback,
748 .ident = "Intel D525MW",
749 .matches = {
750 DMI_MATCH(DMI_BOARD_VENDOR, "Intel"),
751 DMI_EXACT_MATCH(DMI_BOARD_NAME, "D525MW"),
752 },
753 },
754
755 { } /* terminating entry */
756};
757
758/*
759 * Enumerate the child dev array parsed from VBT to check whether
760 * the LVDS is present.
761 * If it is present, return 1.
762 * If it is not present, return false.
763 * If no child dev is parsed from VBT, it assumes that the LVDS is present.
764 */
765static bool lvds_is_present_in_vbt(struct drm_device *dev,
766 u8 *i2c_pin)
767{
768 struct drm_i915_private *dev_priv = dev->dev_private;
769 int i;
770
771 if (!dev_priv->vbt.child_dev_num)
772 return true;
773
774 for (i = 0; i < dev_priv->vbt.child_dev_num; i++) {
775 union child_device_config *uchild = dev_priv->vbt.child_dev + i;
776 struct old_child_dev_config *child = &uchild->old;
777
778 /* If the device type is not LFP, continue.
779 * We have to check both the new identifiers as well as the
780 * old for compatibility with some BIOSes.
781 */
782 if (child->device_type != DEVICE_TYPE_INT_LFP &&
783 child->device_type != DEVICE_TYPE_LFP)
784 continue;
785
786 if (intel_gmbus_is_port_valid(child->i2c_pin))
787 *i2c_pin = child->i2c_pin;
788
789 /* However, we cannot trust the BIOS writers to populate
790 * the VBT correctly. Since LVDS requires additional
791 * information from AIM blocks, a non-zero addin offset is
792 * a good indicator that the LVDS is actually present.
793 */
794 if (child->addin_offset)
795 return true;
796
797 /* But even then some BIOS writers perform some black magic
798 * and instantiate the device without reference to any
799 * additional data. Trust that if the VBT was written into
800 * the OpRegion then they have validated the LVDS's existence.
801 */
802 if (dev_priv->opregion.vbt)
803 return true;
804 }
805
806 return false;
807}
808
809static int intel_dual_link_lvds_callback(const struct dmi_system_id *id)
810{
811 DRM_INFO("Forcing lvds to dual link mode on %s\n", id->ident);
812 return 1;
813}
814
815static const struct dmi_system_id intel_dual_link_lvds[] = {
816 {
817 .callback = intel_dual_link_lvds_callback,
818 .ident = "Apple MacBook Pro (Core i5/i7 Series)",
819 .matches = {
820 DMI_MATCH(DMI_SYS_VENDOR, "Apple Inc."),
821 DMI_MATCH(DMI_PRODUCT_NAME, "MacBookPro8,2"),
822 },
823 },
824 { } /* terminating entry */
825};
826
827bool intel_is_dual_link_lvds(struct drm_device *dev)
828{
829 struct intel_encoder *encoder;
830 struct intel_lvds_encoder *lvds_encoder;
831
832 list_for_each_entry(encoder, &dev->mode_config.encoder_list,
833 base.head) {
834 if (encoder->type == INTEL_OUTPUT_LVDS) {
835 lvds_encoder = to_lvds_encoder(&encoder->base);
836
837 return lvds_encoder->is_dual_link;
838 }
839 }
840
841 return false;
842}
843
844static bool compute_is_dual_link_lvds(struct intel_lvds_encoder *lvds_encoder)
845{
846 struct drm_device *dev = lvds_encoder->base.base.dev;
847 unsigned int val;
848 struct drm_i915_private *dev_priv = dev->dev_private;
849
850 /* use the module option value if specified */
851 if (i915.lvds_channel_mode > 0)
852 return i915.lvds_channel_mode == 2;
853
854 if (dmi_check_system(intel_dual_link_lvds))
855 return true;
856
857 /* BIOS should set the proper LVDS register value at boot, but
858 * in reality, it doesn't set the value when the lid is closed;
859 * we need to check "the value to be set" in VBT when LVDS
860 * register is uninitialized.
861 */
862 val = I915_READ(lvds_encoder->reg);
863 if (!(val & ~(LVDS_PIPE_MASK | LVDS_DETECTED)))
864 val = dev_priv->vbt.bios_lvds_val;
865
866 return (val & LVDS_CLKB_POWER_MASK) == LVDS_CLKB_POWER_UP;
867}
868
869static bool intel_lvds_supported(struct drm_device *dev)
870{
871 /* With the introduction of the PCH we gained a dedicated
872 * LVDS presence pin, use it. */
873 if (HAS_PCH_IBX(dev) || HAS_PCH_CPT(dev))
874 return true;
875
876 /* Otherwise LVDS was only attached to mobile products,
877 * except for the inglorious 830gm */
878 if (INTEL_INFO(dev)->gen <= 4 && IS_MOBILE(dev) && !IS_I830(dev))
879 return true;
880
881 return false;
882}
883
884/**
885 * intel_lvds_init - setup LVDS connectors on this device
886 * @dev: drm device
887 *
888 * Create the connector, register the LVDS DDC bus, and try to figure out what
889 * modes we can display on the LVDS panel (if present).
890 */
891void intel_lvds_init(struct drm_device *dev)
892{
893 struct drm_i915_private *dev_priv = dev->dev_private;
894 struct intel_lvds_encoder *lvds_encoder;
895 struct intel_encoder *intel_encoder;
896 struct intel_lvds_connector *lvds_connector;
897 struct intel_connector *intel_connector;
898 struct drm_connector *connector;
899 struct drm_encoder *encoder;
900 struct drm_display_mode *scan; /* *modes, *bios_mode; */
901 struct drm_display_mode *fixed_mode = NULL;
902 struct drm_display_mode *downclock_mode = NULL;
903 struct edid *edid;
904 struct drm_crtc *crtc;
905 u32 lvds;
906 int pipe;
907 u8 pin;
908
909 if (!intel_lvds_supported(dev))
910 return;
911
912 /* Skip init on machines we know falsely report LVDS */
913 if (dmi_check_system(intel_no_lvds))
914 return;
915
916 pin = GMBUS_PORT_PANEL;
917 if (!lvds_is_present_in_vbt(dev, &pin)) {
918 DRM_DEBUG_KMS("LVDS is not present in VBT\n");
919 return;
920 }
921
922 if (HAS_PCH_SPLIT(dev)) {
923 if ((I915_READ(PCH_LVDS) & LVDS_DETECTED) == 0)
924 return;
925 if (dev_priv->vbt.edp_support) {
926 DRM_DEBUG_KMS("disable LVDS for eDP support\n");
927 return;
928 }
929 }
930
931 lvds_encoder = kzalloc(sizeof(*lvds_encoder), GFP_KERNEL);
932 if (!lvds_encoder)
933 return;
934
935 lvds_connector = kzalloc(sizeof(*lvds_connector), GFP_KERNEL);
936 if (!lvds_connector) {
937 kfree(lvds_encoder);
938 return;
939 }
940
941 lvds_encoder->attached_connector = lvds_connector;
942
943 intel_encoder = &lvds_encoder->base;
944 encoder = &intel_encoder->base;
945 intel_connector = &lvds_connector->base;
946 connector = &intel_connector->base;
947 drm_connector_init(dev, &intel_connector->base, &intel_lvds_connector_funcs,
948 DRM_MODE_CONNECTOR_LVDS);
949
950 drm_encoder_init(dev, &intel_encoder->base, &intel_lvds_enc_funcs,
951 DRM_MODE_ENCODER_LVDS);
952
953 intel_encoder->enable = intel_enable_lvds;
954 intel_encoder->pre_enable = intel_pre_enable_lvds;
955 intel_encoder->compute_config = intel_lvds_compute_config;
956 intel_encoder->mode_set = intel_lvds_mode_set;
957 intel_encoder->disable = intel_disable_lvds;
958 intel_encoder->get_hw_state = intel_lvds_get_hw_state;
959 intel_encoder->get_config = intel_lvds_get_config;
960 intel_connector->get_hw_state = intel_connector_get_hw_state;
961 intel_connector->unregister = intel_connector_unregister;
962
963 intel_connector_attach_encoder(intel_connector, intel_encoder);
964 intel_encoder->type = INTEL_OUTPUT_LVDS;
965
966 intel_encoder->cloneable = 0;
967 if (HAS_PCH_SPLIT(dev))
968 intel_encoder->crtc_mask = (1 << 0) | (1 << 1) | (1 << 2);
969 else if (IS_GEN4(dev))
970 intel_encoder->crtc_mask = (1 << 0) | (1 << 1);
971 else
972 intel_encoder->crtc_mask = (1 << 1);
973
974 drm_connector_helper_add(connector, &intel_lvds_connector_helper_funcs);
975 connector->display_info.subpixel_order = SubPixelHorizontalRGB;
976 connector->interlace_allowed = false;
977 connector->doublescan_allowed = false;
978
979 if (HAS_PCH_SPLIT(dev)) {
980 lvds_encoder->reg = PCH_LVDS;
981 } else {
982 lvds_encoder->reg = LVDS;
983 }
984
985 /* create the scaling mode property */
986 drm_mode_create_scaling_mode_property(dev);
987 drm_object_attach_property(&connector->base,
988 dev->mode_config.scaling_mode_property,
989 DRM_MODE_SCALE_ASPECT);
990 intel_connector->panel.fitting_mode = DRM_MODE_SCALE_ASPECT;
991 /*
992 * LVDS discovery:
993 * 1) check for EDID on DDC
994 * 2) check for VBT data
995 * 3) check to see if LVDS is already on
996 * if none of the above, no panel
997 * 4) make sure lid is open
998 * if closed, act like it's not there for now
999 */
1000
1001 /*
1002 * Attempt to get the fixed panel mode from DDC. Assume that the
1003 * preferred mode is the right one.
1004 */
1005 mutex_lock(&dev->mode_config.mutex);
1006 edid = drm_get_edid(connector, intel_gmbus_get_adapter(dev_priv, pin));
1007 if (edid) {
1008 if (drm_add_edid_modes(connector, edid)) {
1009 drm_mode_connector_update_edid_property(connector,
1010 edid);
1011 } else {
1012 kfree(edid);
1013 edid = ERR_PTR(-EINVAL);
1014 }
1015 } else {
1016 edid = ERR_PTR(-ENOENT);
1017 }
1018 lvds_connector->base.edid = edid;
1019
1020 if (IS_ERR_OR_NULL(edid)) {
1021 /* Didn't get an EDID, so
1022 * Set wide sync ranges so we get all modes
1023 * handed to valid_mode for checking
1024 */
1025 connector->display_info.min_vfreq = 0;
1026 connector->display_info.max_vfreq = 200;
1027 connector->display_info.min_hfreq = 0;
1028 connector->display_info.max_hfreq = 200;
1029 }
1030
1031 list_for_each_entry(scan, &connector->probed_modes, head) {
1032 if (scan->type & DRM_MODE_TYPE_PREFERRED) {
1033 DRM_DEBUG_KMS("using preferred mode from EDID: ");
1034 drm_mode_debug_printmodeline(scan);
1035
1036 fixed_mode = drm_mode_duplicate(dev, scan);
1037 if (fixed_mode) {
1038 downclock_mode =
1039 intel_find_panel_downclock(dev,
1040 fixed_mode, connector);
1041 if (downclock_mode != NULL &&
1042 i915.lvds_downclock) {
1043 /* We found the downclock for LVDS. */
1044 dev_priv->lvds_downclock_avail = true;
1045 dev_priv->lvds_downclock =
1046 downclock_mode->clock;
1047 DRM_DEBUG_KMS("LVDS downclock is found"
1048 " in EDID. Normal clock %dKhz, "
1049 "downclock %dKhz\n",
1050 fixed_mode->clock,
1051 dev_priv->lvds_downclock);
1052 }
1053 goto out;
1054 }
1055 }
1056 }
1057
1058 /* Failed to get EDID, what about VBT? */
1059 if (dev_priv->vbt.lfp_lvds_vbt_mode) {
1060 DRM_DEBUG_KMS("using mode from VBT: ");
1061 drm_mode_debug_printmodeline(dev_priv->vbt.lfp_lvds_vbt_mode);
1062
1063 fixed_mode = drm_mode_duplicate(dev, dev_priv->vbt.lfp_lvds_vbt_mode);
1064 if (fixed_mode) {
1065 fixed_mode->type |= DRM_MODE_TYPE_PREFERRED;
1066 goto out;
1067 }
1068 }
1069
1070 /*
1071 * If we didn't get EDID, try checking if the panel is already turned
1072 * on. If so, assume that whatever is currently programmed is the
1073 * correct mode.
1074 */
1075
1076 /* Ironlake: FIXME if still fail, not try pipe mode now */
1077 if (HAS_PCH_SPLIT(dev))
1078 goto failed;
1079
1080 lvds = I915_READ(LVDS);
1081 pipe = (lvds & LVDS_PIPEB_SELECT) ? 1 : 0;
1082 crtc = intel_get_crtc_for_pipe(dev, pipe);
1083
1084 if (crtc && (lvds & LVDS_PORT_EN)) {
1085 fixed_mode = intel_crtc_mode_get(dev, crtc);
1086 if (fixed_mode) {
1087 DRM_DEBUG_KMS("using current (BIOS) mode: ");
1088 drm_mode_debug_printmodeline(fixed_mode);
1089 fixed_mode->type |= DRM_MODE_TYPE_PREFERRED;
1090 goto out;
1091 }
1092 }
1093
1094 /* If we still don't have a mode after all that, give up. */
1095 if (!fixed_mode)
1096 goto failed;
1097
1098out:
1099 mutex_unlock(&dev->mode_config.mutex);
1100
1101 lvds_encoder->is_dual_link = compute_is_dual_link_lvds(lvds_encoder);
1102 DRM_DEBUG_KMS("detected %s-link lvds configuration\n",
1103 lvds_encoder->is_dual_link ? "dual" : "single");
1104
1105 /*
1106 * Unlock registers and just
1107 * leave them unlocked
1108 */
1109 if (HAS_PCH_SPLIT(dev)) {
1110 I915_WRITE(PCH_PP_CONTROL,
1111 I915_READ(PCH_PP_CONTROL) | PANEL_UNLOCK_REGS);
1112 } else {
1113 I915_WRITE(PP_CONTROL,
1114 I915_READ(PP_CONTROL) | PANEL_UNLOCK_REGS);
1115 }
1116 lvds_connector->lid_notifier.notifier_call = intel_lid_notify;
1117 if (acpi_lid_notifier_register(&lvds_connector->lid_notifier)) {
1118 DRM_DEBUG_KMS("lid notifier registration failed\n");
1119 lvds_connector->lid_notifier.notifier_call = NULL;
1120 }
1121 drm_sysfs_connector_add(connector);
1122
1123 intel_panel_init(&intel_connector->panel, fixed_mode, downclock_mode);
1124 intel_panel_setup_backlight(connector);
1125
1126 return;
1127
1128failed:
1129 mutex_unlock(&dev->mode_config.mutex);
1130
1131 DRM_DEBUG_KMS("No LVDS modes found, disabling.\n");
1132 drm_connector_cleanup(connector);
1133 drm_encoder_cleanup(encoder);
1134 kfree(lvds_encoder);
1135 kfree(lvds_connector);
1136 return;
1137}