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1/*
2 * Copyright © 2006-2011 Intel Corporation
3 *
4 * This program is free software; you can redistribute it and/or modify it
5 * under the terms and conditions of the GNU General Public License,
6 * version 2, as published by the Free Software Foundation.
7 *
8 * This program is distributed in the hope it will be useful, but WITHOUT
9 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
10 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
11 * more details.
12 *
13 * You should have received a copy of the GNU General Public License along with
14 * this program; if not, write to the Free Software Foundation, Inc.,
15 * 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
16 *
17 * Authors:
18 * Eric Anholt <eric@anholt.net>
19 * Dave Airlie <airlied@linux.ie>
20 * Jesse Barnes <jesse.barnes@intel.com>
21 */
22
23#include <linux/i2c.h>
24#include <linux/dmi.h>
25#include <drm/drmP.h>
26
27#include "intel_bios.h"
28#include "psb_drv.h"
29#include "psb_intel_drv.h"
30#include "psb_intel_reg.h"
31#include "power.h"
32#include <linux/pm_runtime.h>
33#include "cdv_device.h"
34
35/**
36 * LVDS I2C backlight control macros
37 */
38#define BRIGHTNESS_MAX_LEVEL 100
39#define BRIGHTNESS_MASK 0xFF
40#define BLC_I2C_TYPE 0x01
41#define BLC_PWM_TYPT 0x02
42
43#define BLC_POLARITY_NORMAL 0
44#define BLC_POLARITY_INVERSE 1
45
46#define PSB_BLC_MAX_PWM_REG_FREQ (0xFFFE)
47#define PSB_BLC_MIN_PWM_REG_FREQ (0x2)
48#define PSB_BLC_PWM_PRECISION_FACTOR (10)
49#define PSB_BACKLIGHT_PWM_CTL_SHIFT (16)
50#define PSB_BACKLIGHT_PWM_POLARITY_BIT_CLEAR (0xFFFE)
51
52struct cdv_intel_lvds_priv {
53 /**
54 * Saved LVDO output states
55 */
56 uint32_t savePP_ON;
57 uint32_t savePP_OFF;
58 uint32_t saveLVDS;
59 uint32_t savePP_CONTROL;
60 uint32_t savePP_CYCLE;
61 uint32_t savePFIT_CONTROL;
62 uint32_t savePFIT_PGM_RATIOS;
63 uint32_t saveBLC_PWM_CTL;
64};
65
66/*
67 * Returns the maximum level of the backlight duty cycle field.
68 */
69static u32 cdv_intel_lvds_get_max_backlight(struct drm_device *dev)
70{
71 struct drm_psb_private *dev_priv = dev->dev_private;
72 u32 retval;
73
74 if (gma_power_begin(dev, false)) {
75 retval = ((REG_READ(BLC_PWM_CTL) &
76 BACKLIGHT_MODULATION_FREQ_MASK) >>
77 BACKLIGHT_MODULATION_FREQ_SHIFT) * 2;
78
79 gma_power_end(dev);
80 } else
81 retval = ((dev_priv->regs.saveBLC_PWM_CTL &
82 BACKLIGHT_MODULATION_FREQ_MASK) >>
83 BACKLIGHT_MODULATION_FREQ_SHIFT) * 2;
84
85 return retval;
86}
87
88#if 0
89/*
90 * Set LVDS backlight level by I2C command
91 */
92static int cdv_lvds_i2c_set_brightness(struct drm_device *dev,
93 unsigned int level)
94{
95 struct drm_psb_private *dev_priv = dev->dev_private;
96 struct psb_intel_i2c_chan *lvds_i2c_bus = dev_priv->lvds_i2c_bus;
97 u8 out_buf[2];
98 unsigned int blc_i2c_brightness;
99
100 struct i2c_msg msgs[] = {
101 {
102 .addr = lvds_i2c_bus->slave_addr,
103 .flags = 0,
104 .len = 2,
105 .buf = out_buf,
106 }
107 };
108
109 blc_i2c_brightness = BRIGHTNESS_MASK & ((unsigned int)level *
110 BRIGHTNESS_MASK /
111 BRIGHTNESS_MAX_LEVEL);
112
113 if (dev_priv->lvds_bl->pol == BLC_POLARITY_INVERSE)
114 blc_i2c_brightness = BRIGHTNESS_MASK - blc_i2c_brightness;
115
116 out_buf[0] = dev_priv->lvds_bl->brightnesscmd;
117 out_buf[1] = (u8)blc_i2c_brightness;
118
119 if (i2c_transfer(&lvds_i2c_bus->adapter, msgs, 1) == 1)
120 return 0;
121
122 DRM_ERROR("I2C transfer error\n");
123 return -1;
124}
125
126
127static int cdv_lvds_pwm_set_brightness(struct drm_device *dev, int level)
128{
129 struct drm_psb_private *dev_priv = dev->dev_private;
130
131 u32 max_pwm_blc;
132 u32 blc_pwm_duty_cycle;
133
134 max_pwm_blc = cdv_intel_lvds_get_max_backlight(dev);
135
136 /*BLC_PWM_CTL Should be initiated while backlight device init*/
137 BUG_ON((max_pwm_blc & PSB_BLC_MAX_PWM_REG_FREQ) == 0);
138
139 blc_pwm_duty_cycle = level * max_pwm_blc / BRIGHTNESS_MAX_LEVEL;
140
141 if (dev_priv->lvds_bl->pol == BLC_POLARITY_INVERSE)
142 blc_pwm_duty_cycle = max_pwm_blc - blc_pwm_duty_cycle;
143
144 blc_pwm_duty_cycle &= PSB_BACKLIGHT_PWM_POLARITY_BIT_CLEAR;
145 REG_WRITE(BLC_PWM_CTL,
146 (max_pwm_blc << PSB_BACKLIGHT_PWM_CTL_SHIFT) |
147 (blc_pwm_duty_cycle));
148
149 return 0;
150}
151
152/*
153 * Set LVDS backlight level either by I2C or PWM
154 */
155void cdv_intel_lvds_set_brightness(struct drm_device *dev, int level)
156{
157 struct drm_psb_private *dev_priv = dev->dev_private;
158
159 if (!dev_priv->lvds_bl) {
160 DRM_ERROR("NO LVDS Backlight Info\n");
161 return;
162 }
163
164 if (dev_priv->lvds_bl->type == BLC_I2C_TYPE)
165 cdv_lvds_i2c_set_brightness(dev, level);
166 else
167 cdv_lvds_pwm_set_brightness(dev, level);
168}
169#endif
170
171/**
172 * Sets the backlight level.
173 *
174 * level backlight level, from 0 to cdv_intel_lvds_get_max_backlight().
175 */
176static void cdv_intel_lvds_set_backlight(struct drm_device *dev, int level)
177{
178 struct drm_psb_private *dev_priv = dev->dev_private;
179 u32 blc_pwm_ctl;
180
181 if (gma_power_begin(dev, false)) {
182 blc_pwm_ctl =
183 REG_READ(BLC_PWM_CTL) & ~BACKLIGHT_DUTY_CYCLE_MASK;
184 REG_WRITE(BLC_PWM_CTL,
185 (blc_pwm_ctl |
186 (level << BACKLIGHT_DUTY_CYCLE_SHIFT)));
187 gma_power_end(dev);
188 } else {
189 blc_pwm_ctl = dev_priv->regs.saveBLC_PWM_CTL &
190 ~BACKLIGHT_DUTY_CYCLE_MASK;
191 dev_priv->regs.saveBLC_PWM_CTL = (blc_pwm_ctl |
192 (level << BACKLIGHT_DUTY_CYCLE_SHIFT));
193 }
194}
195
196/**
197 * Sets the power state for the panel.
198 */
199static void cdv_intel_lvds_set_power(struct drm_device *dev,
200 struct drm_encoder *encoder, bool on)
201{
202 struct drm_psb_private *dev_priv = dev->dev_private;
203 u32 pp_status;
204
205 if (!gma_power_begin(dev, true))
206 return;
207
208 if (on) {
209 REG_WRITE(PP_CONTROL, REG_READ(PP_CONTROL) |
210 POWER_TARGET_ON);
211 do {
212 pp_status = REG_READ(PP_STATUS);
213 } while ((pp_status & PP_ON) == 0);
214
215 cdv_intel_lvds_set_backlight(dev,
216 dev_priv->mode_dev.backlight_duty_cycle);
217 } else {
218 cdv_intel_lvds_set_backlight(dev, 0);
219
220 REG_WRITE(PP_CONTROL, REG_READ(PP_CONTROL) &
221 ~POWER_TARGET_ON);
222 do {
223 pp_status = REG_READ(PP_STATUS);
224 } while (pp_status & PP_ON);
225 }
226 gma_power_end(dev);
227}
228
229static void cdv_intel_lvds_encoder_dpms(struct drm_encoder *encoder, int mode)
230{
231 struct drm_device *dev = encoder->dev;
232 if (mode == DRM_MODE_DPMS_ON)
233 cdv_intel_lvds_set_power(dev, encoder, true);
234 else
235 cdv_intel_lvds_set_power(dev, encoder, false);
236 /* XXX: We never power down the LVDS pairs. */
237}
238
239static void cdv_intel_lvds_save(struct drm_connector *connector)
240{
241}
242
243static void cdv_intel_lvds_restore(struct drm_connector *connector)
244{
245}
246
247static int cdv_intel_lvds_mode_valid(struct drm_connector *connector,
248 struct drm_display_mode *mode)
249{
250 struct drm_device *dev = connector->dev;
251 struct drm_psb_private *dev_priv = dev->dev_private;
252 struct drm_display_mode *fixed_mode =
253 dev_priv->mode_dev.panel_fixed_mode;
254
255 /* just in case */
256 if (mode->flags & DRM_MODE_FLAG_DBLSCAN)
257 return MODE_NO_DBLESCAN;
258
259 /* just in case */
260 if (mode->flags & DRM_MODE_FLAG_INTERLACE)
261 return MODE_NO_INTERLACE;
262
263 if (fixed_mode) {
264 if (mode->hdisplay > fixed_mode->hdisplay)
265 return MODE_PANEL;
266 if (mode->vdisplay > fixed_mode->vdisplay)
267 return MODE_PANEL;
268 }
269 return MODE_OK;
270}
271
272static bool cdv_intel_lvds_mode_fixup(struct drm_encoder *encoder,
273 struct drm_display_mode *mode,
274 struct drm_display_mode *adjusted_mode)
275{
276 struct drm_device *dev = encoder->dev;
277 struct drm_psb_private *dev_priv = dev->dev_private;
278 struct psb_intel_mode_device *mode_dev = &dev_priv->mode_dev;
279 struct drm_encoder *tmp_encoder;
280 struct drm_display_mode *panel_fixed_mode = mode_dev->panel_fixed_mode;
281
282 /* Should never happen!! */
283 list_for_each_entry(tmp_encoder, &dev->mode_config.encoder_list,
284 head) {
285 if (tmp_encoder != encoder
286 && tmp_encoder->crtc == encoder->crtc) {
287 printk(KERN_ERR "Can't enable LVDS and another "
288 "encoder on the same pipe\n");
289 return false;
290 }
291 }
292
293 /*
294 * If we have timings from the BIOS for the panel, put them in
295 * to the adjusted mode. The CRTC will be set up for this mode,
296 * with the panel scaling set up to source from the H/VDisplay
297 * of the original mode.
298 */
299 if (panel_fixed_mode != NULL) {
300 adjusted_mode->hdisplay = panel_fixed_mode->hdisplay;
301 adjusted_mode->hsync_start = panel_fixed_mode->hsync_start;
302 adjusted_mode->hsync_end = panel_fixed_mode->hsync_end;
303 adjusted_mode->htotal = panel_fixed_mode->htotal;
304 adjusted_mode->vdisplay = panel_fixed_mode->vdisplay;
305 adjusted_mode->vsync_start = panel_fixed_mode->vsync_start;
306 adjusted_mode->vsync_end = panel_fixed_mode->vsync_end;
307 adjusted_mode->vtotal = panel_fixed_mode->vtotal;
308 adjusted_mode->clock = panel_fixed_mode->clock;
309 drm_mode_set_crtcinfo(adjusted_mode,
310 CRTC_INTERLACE_HALVE_V);
311 }
312
313 /*
314 * XXX: It would be nice to support lower refresh rates on the
315 * panels to reduce power consumption, and perhaps match the
316 * user's requested refresh rate.
317 */
318
319 return true;
320}
321
322static void cdv_intel_lvds_prepare(struct drm_encoder *encoder)
323{
324 struct drm_device *dev = encoder->dev;
325 struct drm_psb_private *dev_priv = dev->dev_private;
326 struct psb_intel_mode_device *mode_dev = &dev_priv->mode_dev;
327
328 if (!gma_power_begin(dev, true))
329 return;
330
331 mode_dev->saveBLC_PWM_CTL = REG_READ(BLC_PWM_CTL);
332 mode_dev->backlight_duty_cycle = (mode_dev->saveBLC_PWM_CTL &
333 BACKLIGHT_DUTY_CYCLE_MASK);
334
335 cdv_intel_lvds_set_power(dev, encoder, false);
336
337 gma_power_end(dev);
338}
339
340static void cdv_intel_lvds_commit(struct drm_encoder *encoder)
341{
342 struct drm_device *dev = encoder->dev;
343 struct drm_psb_private *dev_priv = dev->dev_private;
344 struct psb_intel_mode_device *mode_dev = &dev_priv->mode_dev;
345
346 if (mode_dev->backlight_duty_cycle == 0)
347 mode_dev->backlight_duty_cycle =
348 cdv_intel_lvds_get_max_backlight(dev);
349
350 cdv_intel_lvds_set_power(dev, encoder, true);
351}
352
353static void cdv_intel_lvds_mode_set(struct drm_encoder *encoder,
354 struct drm_display_mode *mode,
355 struct drm_display_mode *adjusted_mode)
356{
357 struct drm_device *dev = encoder->dev;
358 struct drm_psb_private *dev_priv = dev->dev_private;
359 struct psb_intel_crtc *psb_intel_crtc = to_psb_intel_crtc(
360 encoder->crtc);
361 u32 pfit_control;
362
363 /*
364 * The LVDS pin pair will already have been turned on in the
365 * cdv_intel_crtc_mode_set since it has a large impact on the DPLL
366 * settings.
367 */
368
369 /*
370 * Enable automatic panel scaling so that non-native modes fill the
371 * screen. Should be enabled before the pipe is enabled, according to
372 * register description and PRM.
373 */
374 if (mode->hdisplay != adjusted_mode->hdisplay ||
375 mode->vdisplay != adjusted_mode->vdisplay)
376 pfit_control = (PFIT_ENABLE | VERT_AUTO_SCALE |
377 HORIZ_AUTO_SCALE | VERT_INTERP_BILINEAR |
378 HORIZ_INTERP_BILINEAR);
379 else
380 pfit_control = 0;
381
382 pfit_control |= psb_intel_crtc->pipe << PFIT_PIPE_SHIFT;
383
384 if (dev_priv->lvds_dither)
385 pfit_control |= PANEL_8TO6_DITHER_ENABLE;
386
387 REG_WRITE(PFIT_CONTROL, pfit_control);
388}
389
390/**
391 * Detect the LVDS connection.
392 *
393 * This always returns CONNECTOR_STATUS_CONNECTED.
394 * This connector should only have
395 * been set up if the LVDS was actually connected anyway.
396 */
397static enum drm_connector_status cdv_intel_lvds_detect(
398 struct drm_connector *connector, bool force)
399{
400 return connector_status_connected;
401}
402
403/**
404 * Return the list of DDC modes if available, or the BIOS fixed mode otherwise.
405 */
406static int cdv_intel_lvds_get_modes(struct drm_connector *connector)
407{
408 struct drm_device *dev = connector->dev;
409 struct drm_psb_private *dev_priv = dev->dev_private;
410 struct psb_intel_encoder *psb_intel_encoder =
411 psb_intel_attached_encoder(connector);
412 struct psb_intel_mode_device *mode_dev = &dev_priv->mode_dev;
413 int ret;
414
415 ret = psb_intel_ddc_get_modes(connector, &psb_intel_encoder->i2c_bus->adapter);
416
417 if (ret)
418 return ret;
419
420 /* Didn't get an EDID, so
421 * Set wide sync ranges so we get all modes
422 * handed to valid_mode for checking
423 */
424 connector->display_info.min_vfreq = 0;
425 connector->display_info.max_vfreq = 200;
426 connector->display_info.min_hfreq = 0;
427 connector->display_info.max_hfreq = 200;
428 if (mode_dev->panel_fixed_mode != NULL) {
429 struct drm_display_mode *mode =
430 drm_mode_duplicate(dev, mode_dev->panel_fixed_mode);
431 drm_mode_probed_add(connector, mode);
432 return 1;
433 }
434
435 return 0;
436}
437
438/**
439 * cdv_intel_lvds_destroy - unregister and free LVDS structures
440 * @connector: connector to free
441 *
442 * Unregister the DDC bus for this connector then free the driver private
443 * structure.
444 */
445static void cdv_intel_lvds_destroy(struct drm_connector *connector)
446{
447 struct psb_intel_encoder *psb_intel_encoder =
448 psb_intel_attached_encoder(connector);
449
450 if (psb_intel_encoder->i2c_bus)
451 psb_intel_i2c_destroy(psb_intel_encoder->i2c_bus);
452 drm_sysfs_connector_remove(connector);
453 drm_connector_cleanup(connector);
454 kfree(connector);
455}
456
457static int cdv_intel_lvds_set_property(struct drm_connector *connector,
458 struct drm_property *property,
459 uint64_t value)
460{
461 struct drm_encoder *encoder = connector->encoder;
462
463 if (!strcmp(property->name, "scaling mode") && encoder) {
464 struct psb_intel_crtc *crtc =
465 to_psb_intel_crtc(encoder->crtc);
466 uint64_t curValue;
467
468 if (!crtc)
469 return -1;
470
471 switch (value) {
472 case DRM_MODE_SCALE_FULLSCREEN:
473 break;
474 case DRM_MODE_SCALE_NO_SCALE:
475 break;
476 case DRM_MODE_SCALE_ASPECT:
477 break;
478 default:
479 return -1;
480 }
481
482 if (drm_connector_property_get_value(connector,
483 property,
484 &curValue))
485 return -1;
486
487 if (curValue == value)
488 return 0;
489
490 if (drm_connector_property_set_value(connector,
491 property,
492 value))
493 return -1;
494
495 if (crtc->saved_mode.hdisplay != 0 &&
496 crtc->saved_mode.vdisplay != 0) {
497 if (!drm_crtc_helper_set_mode(encoder->crtc,
498 &crtc->saved_mode,
499 encoder->crtc->x,
500 encoder->crtc->y,
501 encoder->crtc->fb))
502 return -1;
503 }
504 } else if (!strcmp(property->name, "backlight") && encoder) {
505 if (drm_connector_property_set_value(connector,
506 property,
507 value))
508 return -1;
509 else {
510#ifdef CONFIG_BACKLIGHT_CLASS_DEVICE
511 struct drm_psb_private *dev_priv =
512 encoder->dev->dev_private;
513 struct backlight_device *bd =
514 dev_priv->backlight_device;
515 bd->props.brightness = value;
516 backlight_update_status(bd);
517#endif
518 }
519 } else if (!strcmp(property->name, "DPMS") && encoder) {
520 struct drm_encoder_helper_funcs *helpers =
521 encoder->helper_private;
522 helpers->dpms(encoder, value);
523 }
524 return 0;
525}
526
527static const struct drm_encoder_helper_funcs
528 cdv_intel_lvds_helper_funcs = {
529 .dpms = cdv_intel_lvds_encoder_dpms,
530 .mode_fixup = cdv_intel_lvds_mode_fixup,
531 .prepare = cdv_intel_lvds_prepare,
532 .mode_set = cdv_intel_lvds_mode_set,
533 .commit = cdv_intel_lvds_commit,
534};
535
536static const struct drm_connector_helper_funcs
537 cdv_intel_lvds_connector_helper_funcs = {
538 .get_modes = cdv_intel_lvds_get_modes,
539 .mode_valid = cdv_intel_lvds_mode_valid,
540 .best_encoder = psb_intel_best_encoder,
541};
542
543static const struct drm_connector_funcs cdv_intel_lvds_connector_funcs = {
544 .dpms = drm_helper_connector_dpms,
545 .save = cdv_intel_lvds_save,
546 .restore = cdv_intel_lvds_restore,
547 .detect = cdv_intel_lvds_detect,
548 .fill_modes = drm_helper_probe_single_connector_modes,
549 .set_property = cdv_intel_lvds_set_property,
550 .destroy = cdv_intel_lvds_destroy,
551};
552
553
554static void cdv_intel_lvds_enc_destroy(struct drm_encoder *encoder)
555{
556 drm_encoder_cleanup(encoder);
557}
558
559static const struct drm_encoder_funcs cdv_intel_lvds_enc_funcs = {
560 .destroy = cdv_intel_lvds_enc_destroy,
561};
562
563/*
564 * Enumerate the child dev array parsed from VBT to check whether
565 * the LVDS is present.
566 * If it is present, return 1.
567 * If it is not present, return false.
568 * If no child dev is parsed from VBT, it assumes that the LVDS is present.
569 */
570static bool lvds_is_present_in_vbt(struct drm_device *dev,
571 u8 *i2c_pin)
572{
573 struct drm_psb_private *dev_priv = dev->dev_private;
574 int i;
575
576 if (!dev_priv->child_dev_num)
577 return true;
578
579 for (i = 0; i < dev_priv->child_dev_num; i++) {
580 struct child_device_config *child = dev_priv->child_dev + i;
581
582 /* If the device type is not LFP, continue.
583 * We have to check both the new identifiers as well as the
584 * old for compatibility with some BIOSes.
585 */
586 if (child->device_type != DEVICE_TYPE_INT_LFP &&
587 child->device_type != DEVICE_TYPE_LFP)
588 continue;
589
590 if (child->i2c_pin)
591 *i2c_pin = child->i2c_pin;
592
593 /* However, we cannot trust the BIOS writers to populate
594 * the VBT correctly. Since LVDS requires additional
595 * information from AIM blocks, a non-zero addin offset is
596 * a good indicator that the LVDS is actually present.
597 */
598 if (child->addin_offset)
599 return true;
600
601 /* But even then some BIOS writers perform some black magic
602 * and instantiate the device without reference to any
603 * additional data. Trust that if the VBT was written into
604 * the OpRegion then they have validated the LVDS's existence.
605 */
606 if (dev_priv->opregion.vbt)
607 return true;
608 }
609
610 return false;
611}
612
613/**
614 * cdv_intel_lvds_init - setup LVDS connectors on this device
615 * @dev: drm device
616 *
617 * Create the connector, register the LVDS DDC bus, and try to figure out what
618 * modes we can display on the LVDS panel (if present).
619 */
620void cdv_intel_lvds_init(struct drm_device *dev,
621 struct psb_intel_mode_device *mode_dev)
622{
623 struct psb_intel_encoder *psb_intel_encoder;
624 struct psb_intel_connector *psb_intel_connector;
625 struct cdv_intel_lvds_priv *lvds_priv;
626 struct drm_connector *connector;
627 struct drm_encoder *encoder;
628 struct drm_display_mode *scan;
629 struct drm_crtc *crtc;
630 struct drm_psb_private *dev_priv = dev->dev_private;
631 u32 lvds;
632 int pipe;
633 u8 pin;
634
635 pin = GMBUS_PORT_PANEL;
636 if (!lvds_is_present_in_vbt(dev, &pin)) {
637 DRM_DEBUG_KMS("LVDS is not present in VBT\n");
638 return;
639 }
640
641 psb_intel_encoder = kzalloc(sizeof(struct psb_intel_encoder),
642 GFP_KERNEL);
643 if (!psb_intel_encoder)
644 return;
645
646 psb_intel_connector = kzalloc(sizeof(struct psb_intel_connector),
647 GFP_KERNEL);
648 if (!psb_intel_connector)
649 goto failed_connector;
650
651 lvds_priv = kzalloc(sizeof(struct cdv_intel_lvds_priv), GFP_KERNEL);
652 if (!lvds_priv)
653 goto failed_lvds_priv;
654
655 psb_intel_encoder->dev_priv = lvds_priv;
656
657 connector = &psb_intel_connector->base;
658 encoder = &psb_intel_encoder->base;
659
660
661 drm_connector_init(dev, connector,
662 &cdv_intel_lvds_connector_funcs,
663 DRM_MODE_CONNECTOR_LVDS);
664
665 drm_encoder_init(dev, encoder,
666 &cdv_intel_lvds_enc_funcs,
667 DRM_MODE_ENCODER_LVDS);
668
669
670 psb_intel_connector_attach_encoder(psb_intel_connector,
671 psb_intel_encoder);
672 psb_intel_encoder->type = INTEL_OUTPUT_LVDS;
673
674 drm_encoder_helper_add(encoder, &cdv_intel_lvds_helper_funcs);
675 drm_connector_helper_add(connector,
676 &cdv_intel_lvds_connector_helper_funcs);
677 connector->display_info.subpixel_order = SubPixelHorizontalRGB;
678 connector->interlace_allowed = false;
679 connector->doublescan_allowed = false;
680
681 /*Attach connector properties*/
682 drm_connector_attach_property(connector,
683 dev->mode_config.scaling_mode_property,
684 DRM_MODE_SCALE_FULLSCREEN);
685 drm_connector_attach_property(connector,
686 dev_priv->backlight_property,
687 BRIGHTNESS_MAX_LEVEL);
688
689 /**
690 * Set up I2C bus
691 * FIXME: distroy i2c_bus when exit
692 */
693 psb_intel_encoder->i2c_bus = psb_intel_i2c_create(dev,
694 GPIOB,
695 "LVDSBLC_B");
696 if (!psb_intel_encoder->i2c_bus) {
697 dev_printk(KERN_ERR,
698 &dev->pdev->dev, "I2C bus registration failed.\n");
699 goto failed_blc_i2c;
700 }
701 psb_intel_encoder->i2c_bus->slave_addr = 0x2C;
702 dev_priv->lvds_i2c_bus = psb_intel_encoder->i2c_bus;
703
704 /*
705 * LVDS discovery:
706 * 1) check for EDID on DDC
707 * 2) check for VBT data
708 * 3) check to see if LVDS is already on
709 * if none of the above, no panel
710 * 4) make sure lid is open
711 * if closed, act like it's not there for now
712 */
713
714 /* Set up the DDC bus. */
715 psb_intel_encoder->ddc_bus = psb_intel_i2c_create(dev,
716 GPIOC,
717 "LVDSDDC_C");
718 if (!psb_intel_encoder->ddc_bus) {
719 dev_printk(KERN_ERR, &dev->pdev->dev,
720 "DDC bus registration " "failed.\n");
721 goto failed_ddc;
722 }
723
724 /*
725 * Attempt to get the fixed panel mode from DDC. Assume that the
726 * preferred mode is the right one.
727 */
728 psb_intel_ddc_get_modes(connector,
729 &psb_intel_encoder->ddc_bus->adapter);
730 list_for_each_entry(scan, &connector->probed_modes, head) {
731 if (scan->type & DRM_MODE_TYPE_PREFERRED) {
732 mode_dev->panel_fixed_mode =
733 drm_mode_duplicate(dev, scan);
734 goto out; /* FIXME: check for quirks */
735 }
736 }
737
738 /* Failed to get EDID, what about VBT? do we need this?*/
739 if (dev_priv->lfp_lvds_vbt_mode) {
740 mode_dev->panel_fixed_mode =
741 drm_mode_duplicate(dev, dev_priv->lfp_lvds_vbt_mode);
742 if (mode_dev->panel_fixed_mode) {
743 mode_dev->panel_fixed_mode->type |=
744 DRM_MODE_TYPE_PREFERRED;
745 goto out; /* FIXME: check for quirks */
746 }
747 }
748 /*
749 * If we didn't get EDID, try checking if the panel is already turned
750 * on. If so, assume that whatever is currently programmed is the
751 * correct mode.
752 */
753 lvds = REG_READ(LVDS);
754 pipe = (lvds & LVDS_PIPEB_SELECT) ? 1 : 0;
755 crtc = psb_intel_get_crtc_from_pipe(dev, pipe);
756
757 if (crtc && (lvds & LVDS_PORT_EN)) {
758 mode_dev->panel_fixed_mode =
759 cdv_intel_crtc_mode_get(dev, crtc);
760 if (mode_dev->panel_fixed_mode) {
761 mode_dev->panel_fixed_mode->type |=
762 DRM_MODE_TYPE_PREFERRED;
763 goto out; /* FIXME: check for quirks */
764 }
765 }
766
767 /* If we still don't have a mode after all that, give up. */
768 if (!mode_dev->panel_fixed_mode) {
769 DRM_DEBUG
770 ("Found no modes on the lvds, ignoring the LVDS\n");
771 goto failed_find;
772 }
773
774 /* setup PWM */
775 {
776 u32 pwm;
777
778 pwm = REG_READ(BLC_PWM_CTL2);
779 if (pipe == 1)
780 pwm |= PWM_PIPE_B;
781 else
782 pwm &= ~PWM_PIPE_B;
783 pwm |= PWM_ENABLE;
784 REG_WRITE(BLC_PWM_CTL2, pwm);
785 }
786
787out:
788 drm_sysfs_connector_add(connector);
789 return;
790
791failed_find:
792 printk(KERN_ERR "Failed find\n");
793 if (psb_intel_encoder->ddc_bus)
794 psb_intel_i2c_destroy(psb_intel_encoder->ddc_bus);
795failed_ddc:
796 printk(KERN_ERR "Failed DDC\n");
797 if (psb_intel_encoder->i2c_bus)
798 psb_intel_i2c_destroy(psb_intel_encoder->i2c_bus);
799failed_blc_i2c:
800 printk(KERN_ERR "Failed BLC\n");
801 drm_encoder_cleanup(encoder);
802 drm_connector_cleanup(connector);
803 kfree(lvds_priv);
804failed_lvds_priv:
805 kfree(psb_intel_connector);
806failed_connector:
807 kfree(psb_intel_encoder);
808}