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Merge tag 'fbdev-updates-for-3.7' of git://github.com/schandinat/linux-2.6
[mirror_ubuntu-zesty-kernel.git] / drivers / video / omap2 / displays / panel-taal.c
1 /*
2 * Taal DSI command mode panel
3 *
4 * Copyright (C) 2009 Nokia Corporation
5 * Author: Tomi Valkeinen <tomi.valkeinen@nokia.com>
6 *
7 * This program is free software; you can redistribute it and/or modify it
8 * under the terms of the GNU General Public License version 2 as published by
9 * the Free Software Foundation.
10 *
11 * This program is distributed in the hope that it will be useful, but WITHOUT
12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
14 * more details.
15 *
16 * You should have received a copy of the GNU General Public License along with
17 * this program. If not, see <http://www.gnu.org/licenses/>.
18 */
19
20 /*#define DEBUG*/
21
22 #include <linux/module.h>
23 #include <linux/delay.h>
24 #include <linux/err.h>
25 #include <linux/jiffies.h>
26 #include <linux/sched.h>
27 #include <linux/backlight.h>
28 #include <linux/fb.h>
29 #include <linux/interrupt.h>
30 #include <linux/gpio.h>
31 #include <linux/workqueue.h>
32 #include <linux/slab.h>
33 #include <linux/mutex.h>
34
35 #include <video/omapdss.h>
36 #include <video/omap-panel-nokia-dsi.h>
37 #include <video/mipi_display.h>
38
39 /* DSI Virtual channel. Hardcoded for now. */
40 #define TCH 0
41
42 #define DCS_READ_NUM_ERRORS 0x05
43 #define DCS_BRIGHTNESS 0x51
44 #define DCS_CTRL_DISPLAY 0x53
45 #define DCS_WRITE_CABC 0x55
46 #define DCS_READ_CABC 0x56
47 #define DCS_GET_ID1 0xda
48 #define DCS_GET_ID2 0xdb
49 #define DCS_GET_ID3 0xdc
50
51 static irqreturn_t taal_te_isr(int irq, void *data);
52 static void taal_te_timeout_work_callback(struct work_struct *work);
53 static int _taal_enable_te(struct omap_dss_device *dssdev, bool enable);
54
55 static int taal_panel_reset(struct omap_dss_device *dssdev);
56
57 /**
58 * struct panel_config - panel configuration
59 * @name: panel name
60 * @type: panel type
61 * @timings: panel resolution
62 * @sleep: various panel specific delays, passed to msleep() if non-zero
63 * @reset_sequence: reset sequence timings, passed to udelay() if non-zero
64 * @regulators: array of panel regulators
65 * @num_regulators: number of regulators in the array
66 */
67 struct panel_config {
68 const char *name;
69 int type;
70
71 struct omap_video_timings timings;
72
73 struct {
74 unsigned int sleep_in;
75 unsigned int sleep_out;
76 unsigned int hw_reset;
77 unsigned int enable_te;
78 } sleep;
79
80 struct {
81 unsigned int high;
82 unsigned int low;
83 } reset_sequence;
84
85 };
86
87 enum {
88 PANEL_TAAL,
89 };
90
91 static struct panel_config panel_configs[] = {
92 {
93 .name = "taal",
94 .type = PANEL_TAAL,
95 .timings = {
96 .x_res = 864,
97 .y_res = 480,
98 },
99 .sleep = {
100 .sleep_in = 5,
101 .sleep_out = 5,
102 .hw_reset = 5,
103 .enable_te = 100, /* possible panel bug */
104 },
105 .reset_sequence = {
106 .high = 10,
107 .low = 10,
108 },
109 },
110 };
111
112 struct taal_data {
113 struct mutex lock;
114
115 struct backlight_device *bldev;
116
117 unsigned long hw_guard_end; /* next value of jiffies when we can
118 * issue the next sleep in/out command
119 */
120 unsigned long hw_guard_wait; /* max guard time in jiffies */
121
122 struct omap_dss_device *dssdev;
123
124 /* panel specific HW info */
125 struct panel_config *panel_config;
126
127 /* panel HW configuration from DT or platform data */
128 int reset_gpio;
129 int ext_te_gpio;
130
131 bool use_dsi_backlight;
132
133 struct omap_dsi_pin_config pin_config;
134
135 /* runtime variables */
136 bool enabled;
137 u8 rotate;
138 bool mirror;
139
140 bool te_enabled;
141
142 atomic_t do_update;
143 int channel;
144
145 struct delayed_work te_timeout_work;
146
147 bool cabc_broken;
148 unsigned cabc_mode;
149
150 bool intro_printed;
151
152 struct workqueue_struct *workqueue;
153
154 struct delayed_work esd_work;
155 unsigned esd_interval;
156
157 bool ulps_enabled;
158 unsigned ulps_timeout;
159 struct delayed_work ulps_work;
160 };
161
162 static void taal_esd_work(struct work_struct *work);
163 static void taal_ulps_work(struct work_struct *work);
164
165 static void hw_guard_start(struct taal_data *td, int guard_msec)
166 {
167 td->hw_guard_wait = msecs_to_jiffies(guard_msec);
168 td->hw_guard_end = jiffies + td->hw_guard_wait;
169 }
170
171 static void hw_guard_wait(struct taal_data *td)
172 {
173 unsigned long wait = td->hw_guard_end - jiffies;
174
175 if ((long)wait > 0 && wait <= td->hw_guard_wait) {
176 set_current_state(TASK_UNINTERRUPTIBLE);
177 schedule_timeout(wait);
178 }
179 }
180
181 static int taal_dcs_read_1(struct taal_data *td, u8 dcs_cmd, u8 *data)
182 {
183 int r;
184 u8 buf[1];
185
186 r = dsi_vc_dcs_read(td->dssdev, td->channel, dcs_cmd, buf, 1);
187
188 if (r < 0)
189 return r;
190
191 *data = buf[0];
192
193 return 0;
194 }
195
196 static int taal_dcs_write_0(struct taal_data *td, u8 dcs_cmd)
197 {
198 return dsi_vc_dcs_write(td->dssdev, td->channel, &dcs_cmd, 1);
199 }
200
201 static int taal_dcs_write_1(struct taal_data *td, u8 dcs_cmd, u8 param)
202 {
203 u8 buf[2];
204 buf[0] = dcs_cmd;
205 buf[1] = param;
206 return dsi_vc_dcs_write(td->dssdev, td->channel, buf, 2);
207 }
208
209 static int taal_sleep_in(struct taal_data *td)
210
211 {
212 u8 cmd;
213 int r;
214
215 hw_guard_wait(td);
216
217 cmd = MIPI_DCS_ENTER_SLEEP_MODE;
218 r = dsi_vc_dcs_write_nosync(td->dssdev, td->channel, &cmd, 1);
219 if (r)
220 return r;
221
222 hw_guard_start(td, 120);
223
224 if (td->panel_config->sleep.sleep_in)
225 msleep(td->panel_config->sleep.sleep_in);
226
227 return 0;
228 }
229
230 static int taal_sleep_out(struct taal_data *td)
231 {
232 int r;
233
234 hw_guard_wait(td);
235
236 r = taal_dcs_write_0(td, MIPI_DCS_EXIT_SLEEP_MODE);
237 if (r)
238 return r;
239
240 hw_guard_start(td, 120);
241
242 if (td->panel_config->sleep.sleep_out)
243 msleep(td->panel_config->sleep.sleep_out);
244
245 return 0;
246 }
247
248 static int taal_get_id(struct taal_data *td, u8 *id1, u8 *id2, u8 *id3)
249 {
250 int r;
251
252 r = taal_dcs_read_1(td, DCS_GET_ID1, id1);
253 if (r)
254 return r;
255 r = taal_dcs_read_1(td, DCS_GET_ID2, id2);
256 if (r)
257 return r;
258 r = taal_dcs_read_1(td, DCS_GET_ID3, id3);
259 if (r)
260 return r;
261
262 return 0;
263 }
264
265 static int taal_set_addr_mode(struct taal_data *td, u8 rotate, bool mirror)
266 {
267 int r;
268 u8 mode;
269 int b5, b6, b7;
270
271 r = taal_dcs_read_1(td, MIPI_DCS_GET_ADDRESS_MODE, &mode);
272 if (r)
273 return r;
274
275 switch (rotate) {
276 default:
277 case 0:
278 b7 = 0;
279 b6 = 0;
280 b5 = 0;
281 break;
282 case 1:
283 b7 = 0;
284 b6 = 1;
285 b5 = 1;
286 break;
287 case 2:
288 b7 = 1;
289 b6 = 1;
290 b5 = 0;
291 break;
292 case 3:
293 b7 = 1;
294 b6 = 0;
295 b5 = 1;
296 break;
297 }
298
299 if (mirror)
300 b6 = !b6;
301
302 mode &= ~((1<<7) | (1<<6) | (1<<5));
303 mode |= (b7 << 7) | (b6 << 6) | (b5 << 5);
304
305 return taal_dcs_write_1(td, MIPI_DCS_SET_ADDRESS_MODE, mode);
306 }
307
308 static int taal_set_update_window(struct taal_data *td,
309 u16 x, u16 y, u16 w, u16 h)
310 {
311 int r;
312 u16 x1 = x;
313 u16 x2 = x + w - 1;
314 u16 y1 = y;
315 u16 y2 = y + h - 1;
316
317 u8 buf[5];
318 buf[0] = MIPI_DCS_SET_COLUMN_ADDRESS;
319 buf[1] = (x1 >> 8) & 0xff;
320 buf[2] = (x1 >> 0) & 0xff;
321 buf[3] = (x2 >> 8) & 0xff;
322 buf[4] = (x2 >> 0) & 0xff;
323
324 r = dsi_vc_dcs_write_nosync(td->dssdev, td->channel, buf, sizeof(buf));
325 if (r)
326 return r;
327
328 buf[0] = MIPI_DCS_SET_PAGE_ADDRESS;
329 buf[1] = (y1 >> 8) & 0xff;
330 buf[2] = (y1 >> 0) & 0xff;
331 buf[3] = (y2 >> 8) & 0xff;
332 buf[4] = (y2 >> 0) & 0xff;
333
334 r = dsi_vc_dcs_write_nosync(td->dssdev, td->channel, buf, sizeof(buf));
335 if (r)
336 return r;
337
338 dsi_vc_send_bta_sync(td->dssdev, td->channel);
339
340 return r;
341 }
342
343 static void taal_queue_esd_work(struct omap_dss_device *dssdev)
344 {
345 struct taal_data *td = dev_get_drvdata(&dssdev->dev);
346
347 if (td->esd_interval > 0)
348 queue_delayed_work(td->workqueue, &td->esd_work,
349 msecs_to_jiffies(td->esd_interval));
350 }
351
352 static void taal_cancel_esd_work(struct omap_dss_device *dssdev)
353 {
354 struct taal_data *td = dev_get_drvdata(&dssdev->dev);
355
356 cancel_delayed_work(&td->esd_work);
357 }
358
359 static void taal_queue_ulps_work(struct omap_dss_device *dssdev)
360 {
361 struct taal_data *td = dev_get_drvdata(&dssdev->dev);
362
363 if (td->ulps_timeout > 0)
364 queue_delayed_work(td->workqueue, &td->ulps_work,
365 msecs_to_jiffies(td->ulps_timeout));
366 }
367
368 static void taal_cancel_ulps_work(struct omap_dss_device *dssdev)
369 {
370 struct taal_data *td = dev_get_drvdata(&dssdev->dev);
371
372 cancel_delayed_work(&td->ulps_work);
373 }
374
375 static int taal_enter_ulps(struct omap_dss_device *dssdev)
376 {
377 struct taal_data *td = dev_get_drvdata(&dssdev->dev);
378 int r;
379
380 if (td->ulps_enabled)
381 return 0;
382
383 taal_cancel_ulps_work(dssdev);
384
385 r = _taal_enable_te(dssdev, false);
386 if (r)
387 goto err;
388
389 if (gpio_is_valid(td->ext_te_gpio))
390 disable_irq(gpio_to_irq(td->ext_te_gpio));
391
392 omapdss_dsi_display_disable(dssdev, false, true);
393
394 td->ulps_enabled = true;
395
396 return 0;
397
398 err:
399 dev_err(&dssdev->dev, "enter ULPS failed");
400 taal_panel_reset(dssdev);
401
402 td->ulps_enabled = false;
403
404 taal_queue_ulps_work(dssdev);
405
406 return r;
407 }
408
409 static int taal_exit_ulps(struct omap_dss_device *dssdev)
410 {
411 struct taal_data *td = dev_get_drvdata(&dssdev->dev);
412 int r;
413
414 if (!td->ulps_enabled)
415 return 0;
416
417 r = omapdss_dsi_display_enable(dssdev);
418 if (r) {
419 dev_err(&dssdev->dev, "failed to enable DSI\n");
420 goto err1;
421 }
422
423 omapdss_dsi_vc_enable_hs(dssdev, td->channel, true);
424
425 r = _taal_enable_te(dssdev, true);
426 if (r) {
427 dev_err(&dssdev->dev, "failed to re-enable TE");
428 goto err2;
429 }
430
431 if (gpio_is_valid(td->ext_te_gpio))
432 enable_irq(gpio_to_irq(td->ext_te_gpio));
433
434 taal_queue_ulps_work(dssdev);
435
436 td->ulps_enabled = false;
437
438 return 0;
439
440 err2:
441 dev_err(&dssdev->dev, "failed to exit ULPS");
442
443 r = taal_panel_reset(dssdev);
444 if (!r) {
445 if (gpio_is_valid(td->ext_te_gpio))
446 enable_irq(gpio_to_irq(td->ext_te_gpio));
447 td->ulps_enabled = false;
448 }
449 err1:
450 taal_queue_ulps_work(dssdev);
451
452 return r;
453 }
454
455 static int taal_wake_up(struct omap_dss_device *dssdev)
456 {
457 struct taal_data *td = dev_get_drvdata(&dssdev->dev);
458
459 if (td->ulps_enabled)
460 return taal_exit_ulps(dssdev);
461
462 taal_cancel_ulps_work(dssdev);
463 taal_queue_ulps_work(dssdev);
464 return 0;
465 }
466
467 static int taal_bl_update_status(struct backlight_device *dev)
468 {
469 struct omap_dss_device *dssdev = dev_get_drvdata(&dev->dev);
470 struct taal_data *td = dev_get_drvdata(&dssdev->dev);
471 int r;
472 int level;
473
474 if (dev->props.fb_blank == FB_BLANK_UNBLANK &&
475 dev->props.power == FB_BLANK_UNBLANK)
476 level = dev->props.brightness;
477 else
478 level = 0;
479
480 dev_dbg(&dssdev->dev, "update brightness to %d\n", level);
481
482 mutex_lock(&td->lock);
483
484 if (td->enabled) {
485 dsi_bus_lock(dssdev);
486
487 r = taal_wake_up(dssdev);
488 if (!r)
489 r = taal_dcs_write_1(td, DCS_BRIGHTNESS, level);
490
491 dsi_bus_unlock(dssdev);
492 } else {
493 r = 0;
494 }
495
496 mutex_unlock(&td->lock);
497
498 return r;
499 }
500
501 static int taal_bl_get_intensity(struct backlight_device *dev)
502 {
503 if (dev->props.fb_blank == FB_BLANK_UNBLANK &&
504 dev->props.power == FB_BLANK_UNBLANK)
505 return dev->props.brightness;
506
507 return 0;
508 }
509
510 static const struct backlight_ops taal_bl_ops = {
511 .get_brightness = taal_bl_get_intensity,
512 .update_status = taal_bl_update_status,
513 };
514
515 static void taal_get_resolution(struct omap_dss_device *dssdev,
516 u16 *xres, u16 *yres)
517 {
518 struct taal_data *td = dev_get_drvdata(&dssdev->dev);
519
520 if (td->rotate == 0 || td->rotate == 2) {
521 *xres = dssdev->panel.timings.x_res;
522 *yres = dssdev->panel.timings.y_res;
523 } else {
524 *yres = dssdev->panel.timings.x_res;
525 *xres = dssdev->panel.timings.y_res;
526 }
527 }
528
529 static ssize_t taal_num_errors_show(struct device *dev,
530 struct device_attribute *attr, char *buf)
531 {
532 struct omap_dss_device *dssdev = to_dss_device(dev);
533 struct taal_data *td = dev_get_drvdata(&dssdev->dev);
534 u8 errors = 0;
535 int r;
536
537 mutex_lock(&td->lock);
538
539 if (td->enabled) {
540 dsi_bus_lock(dssdev);
541
542 r = taal_wake_up(dssdev);
543 if (!r)
544 r = taal_dcs_read_1(td, DCS_READ_NUM_ERRORS, &errors);
545
546 dsi_bus_unlock(dssdev);
547 } else {
548 r = -ENODEV;
549 }
550
551 mutex_unlock(&td->lock);
552
553 if (r)
554 return r;
555
556 return snprintf(buf, PAGE_SIZE, "%d\n", errors);
557 }
558
559 static ssize_t taal_hw_revision_show(struct device *dev,
560 struct device_attribute *attr, char *buf)
561 {
562 struct omap_dss_device *dssdev = to_dss_device(dev);
563 struct taal_data *td = dev_get_drvdata(&dssdev->dev);
564 u8 id1, id2, id3;
565 int r;
566
567 mutex_lock(&td->lock);
568
569 if (td->enabled) {
570 dsi_bus_lock(dssdev);
571
572 r = taal_wake_up(dssdev);
573 if (!r)
574 r = taal_get_id(td, &id1, &id2, &id3);
575
576 dsi_bus_unlock(dssdev);
577 } else {
578 r = -ENODEV;
579 }
580
581 mutex_unlock(&td->lock);
582
583 if (r)
584 return r;
585
586 return snprintf(buf, PAGE_SIZE, "%02x.%02x.%02x\n", id1, id2, id3);
587 }
588
589 static const char *cabc_modes[] = {
590 "off", /* used also always when CABC is not supported */
591 "ui",
592 "still-image",
593 "moving-image",
594 };
595
596 static ssize_t show_cabc_mode(struct device *dev,
597 struct device_attribute *attr,
598 char *buf)
599 {
600 struct omap_dss_device *dssdev = to_dss_device(dev);
601 struct taal_data *td = dev_get_drvdata(&dssdev->dev);
602 const char *mode_str;
603 int mode;
604 int len;
605
606 mode = td->cabc_mode;
607
608 mode_str = "unknown";
609 if (mode >= 0 && mode < ARRAY_SIZE(cabc_modes))
610 mode_str = cabc_modes[mode];
611 len = snprintf(buf, PAGE_SIZE, "%s\n", mode_str);
612
613 return len < PAGE_SIZE - 1 ? len : PAGE_SIZE - 1;
614 }
615
616 static ssize_t store_cabc_mode(struct device *dev,
617 struct device_attribute *attr,
618 const char *buf, size_t count)
619 {
620 struct omap_dss_device *dssdev = to_dss_device(dev);
621 struct taal_data *td = dev_get_drvdata(&dssdev->dev);
622 int i;
623 int r;
624
625 for (i = 0; i < ARRAY_SIZE(cabc_modes); i++) {
626 if (sysfs_streq(cabc_modes[i], buf))
627 break;
628 }
629
630 if (i == ARRAY_SIZE(cabc_modes))
631 return -EINVAL;
632
633 mutex_lock(&td->lock);
634
635 if (td->enabled) {
636 dsi_bus_lock(dssdev);
637
638 if (!td->cabc_broken) {
639 r = taal_wake_up(dssdev);
640 if (r)
641 goto err;
642
643 r = taal_dcs_write_1(td, DCS_WRITE_CABC, i);
644 if (r)
645 goto err;
646 }
647
648 dsi_bus_unlock(dssdev);
649 }
650
651 td->cabc_mode = i;
652
653 mutex_unlock(&td->lock);
654
655 return count;
656 err:
657 dsi_bus_unlock(dssdev);
658 mutex_unlock(&td->lock);
659 return r;
660 }
661
662 static ssize_t show_cabc_available_modes(struct device *dev,
663 struct device_attribute *attr,
664 char *buf)
665 {
666 int len;
667 int i;
668
669 for (i = 0, len = 0;
670 len < PAGE_SIZE && i < ARRAY_SIZE(cabc_modes); i++)
671 len += snprintf(&buf[len], PAGE_SIZE - len, "%s%s%s",
672 i ? " " : "", cabc_modes[i],
673 i == ARRAY_SIZE(cabc_modes) - 1 ? "\n" : "");
674
675 return len < PAGE_SIZE ? len : PAGE_SIZE - 1;
676 }
677
678 static ssize_t taal_store_esd_interval(struct device *dev,
679 struct device_attribute *attr,
680 const char *buf, size_t count)
681 {
682 struct omap_dss_device *dssdev = to_dss_device(dev);
683 struct taal_data *td = dev_get_drvdata(&dssdev->dev);
684
685 unsigned long t;
686 int r;
687
688 r = strict_strtoul(buf, 10, &t);
689 if (r)
690 return r;
691
692 mutex_lock(&td->lock);
693 taal_cancel_esd_work(dssdev);
694 td->esd_interval = t;
695 if (td->enabled)
696 taal_queue_esd_work(dssdev);
697 mutex_unlock(&td->lock);
698
699 return count;
700 }
701
702 static ssize_t taal_show_esd_interval(struct device *dev,
703 struct device_attribute *attr,
704 char *buf)
705 {
706 struct omap_dss_device *dssdev = to_dss_device(dev);
707 struct taal_data *td = dev_get_drvdata(&dssdev->dev);
708 unsigned t;
709
710 mutex_lock(&td->lock);
711 t = td->esd_interval;
712 mutex_unlock(&td->lock);
713
714 return snprintf(buf, PAGE_SIZE, "%u\n", t);
715 }
716
717 static ssize_t taal_store_ulps(struct device *dev,
718 struct device_attribute *attr,
719 const char *buf, size_t count)
720 {
721 struct omap_dss_device *dssdev = to_dss_device(dev);
722 struct taal_data *td = dev_get_drvdata(&dssdev->dev);
723 unsigned long t;
724 int r;
725
726 r = strict_strtoul(buf, 10, &t);
727 if (r)
728 return r;
729
730 mutex_lock(&td->lock);
731
732 if (td->enabled) {
733 dsi_bus_lock(dssdev);
734
735 if (t)
736 r = taal_enter_ulps(dssdev);
737 else
738 r = taal_wake_up(dssdev);
739
740 dsi_bus_unlock(dssdev);
741 }
742
743 mutex_unlock(&td->lock);
744
745 if (r)
746 return r;
747
748 return count;
749 }
750
751 static ssize_t taal_show_ulps(struct device *dev,
752 struct device_attribute *attr,
753 char *buf)
754 {
755 struct omap_dss_device *dssdev = to_dss_device(dev);
756 struct taal_data *td = dev_get_drvdata(&dssdev->dev);
757 unsigned t;
758
759 mutex_lock(&td->lock);
760 t = td->ulps_enabled;
761 mutex_unlock(&td->lock);
762
763 return snprintf(buf, PAGE_SIZE, "%u\n", t);
764 }
765
766 static ssize_t taal_store_ulps_timeout(struct device *dev,
767 struct device_attribute *attr,
768 const char *buf, size_t count)
769 {
770 struct omap_dss_device *dssdev = to_dss_device(dev);
771 struct taal_data *td = dev_get_drvdata(&dssdev->dev);
772 unsigned long t;
773 int r;
774
775 r = strict_strtoul(buf, 10, &t);
776 if (r)
777 return r;
778
779 mutex_lock(&td->lock);
780 td->ulps_timeout = t;
781
782 if (td->enabled) {
783 /* taal_wake_up will restart the timer */
784 dsi_bus_lock(dssdev);
785 r = taal_wake_up(dssdev);
786 dsi_bus_unlock(dssdev);
787 }
788
789 mutex_unlock(&td->lock);
790
791 if (r)
792 return r;
793
794 return count;
795 }
796
797 static ssize_t taal_show_ulps_timeout(struct device *dev,
798 struct device_attribute *attr,
799 char *buf)
800 {
801 struct omap_dss_device *dssdev = to_dss_device(dev);
802 struct taal_data *td = dev_get_drvdata(&dssdev->dev);
803 unsigned t;
804
805 mutex_lock(&td->lock);
806 t = td->ulps_timeout;
807 mutex_unlock(&td->lock);
808
809 return snprintf(buf, PAGE_SIZE, "%u\n", t);
810 }
811
812 static DEVICE_ATTR(num_dsi_errors, S_IRUGO, taal_num_errors_show, NULL);
813 static DEVICE_ATTR(hw_revision, S_IRUGO, taal_hw_revision_show, NULL);
814 static DEVICE_ATTR(cabc_mode, S_IRUGO | S_IWUSR,
815 show_cabc_mode, store_cabc_mode);
816 static DEVICE_ATTR(cabc_available_modes, S_IRUGO,
817 show_cabc_available_modes, NULL);
818 static DEVICE_ATTR(esd_interval, S_IRUGO | S_IWUSR,
819 taal_show_esd_interval, taal_store_esd_interval);
820 static DEVICE_ATTR(ulps, S_IRUGO | S_IWUSR,
821 taal_show_ulps, taal_store_ulps);
822 static DEVICE_ATTR(ulps_timeout, S_IRUGO | S_IWUSR,
823 taal_show_ulps_timeout, taal_store_ulps_timeout);
824
825 static struct attribute *taal_attrs[] = {
826 &dev_attr_num_dsi_errors.attr,
827 &dev_attr_hw_revision.attr,
828 &dev_attr_cabc_mode.attr,
829 &dev_attr_cabc_available_modes.attr,
830 &dev_attr_esd_interval.attr,
831 &dev_attr_ulps.attr,
832 &dev_attr_ulps_timeout.attr,
833 NULL,
834 };
835
836 static struct attribute_group taal_attr_group = {
837 .attrs = taal_attrs,
838 };
839
840 static void taal_hw_reset(struct omap_dss_device *dssdev)
841 {
842 struct taal_data *td = dev_get_drvdata(&dssdev->dev);
843
844 if (!gpio_is_valid(td->reset_gpio))
845 return;
846
847 gpio_set_value(td->reset_gpio, 1);
848 if (td->panel_config->reset_sequence.high)
849 udelay(td->panel_config->reset_sequence.high);
850 /* reset the panel */
851 gpio_set_value(td->reset_gpio, 0);
852 /* assert reset */
853 if (td->panel_config->reset_sequence.low)
854 udelay(td->panel_config->reset_sequence.low);
855 gpio_set_value(td->reset_gpio, 1);
856 /* wait after releasing reset */
857 if (td->panel_config->sleep.hw_reset)
858 msleep(td->panel_config->sleep.hw_reset);
859 }
860
861 static void taal_probe_pdata(struct taal_data *td,
862 const struct nokia_dsi_panel_data *pdata)
863 {
864 td->reset_gpio = pdata->reset_gpio;
865
866 if (pdata->use_ext_te)
867 td->ext_te_gpio = pdata->ext_te_gpio;
868 else
869 td->ext_te_gpio = -1;
870
871 td->esd_interval = pdata->esd_interval;
872 td->ulps_timeout = pdata->ulps_timeout;
873
874 td->use_dsi_backlight = pdata->use_dsi_backlight;
875
876 td->pin_config = pdata->pin_config;
877 }
878
879 static int taal_probe(struct omap_dss_device *dssdev)
880 {
881 struct backlight_properties props;
882 struct taal_data *td;
883 struct backlight_device *bldev = NULL;
884 int r, i;
885 const char *panel_name;
886
887 dev_dbg(&dssdev->dev, "probe\n");
888
889 td = devm_kzalloc(&dssdev->dev, sizeof(*td), GFP_KERNEL);
890 if (!td)
891 return -ENOMEM;
892
893 dev_set_drvdata(&dssdev->dev, td);
894 td->dssdev = dssdev;
895
896 if (dssdev->data) {
897 const struct nokia_dsi_panel_data *pdata = dssdev->data;
898
899 taal_probe_pdata(td, pdata);
900
901 panel_name = pdata->name;
902 } else {
903 return -ENODEV;
904 }
905
906 if (panel_name == NULL)
907 return -EINVAL;
908
909 for (i = 0; i < ARRAY_SIZE(panel_configs); i++) {
910 if (strcmp(panel_name, panel_configs[i].name) == 0) {
911 td->panel_config = &panel_configs[i];
912 break;
913 }
914 }
915
916 if (!td->panel_config)
917 return -EINVAL;
918
919 dssdev->panel.timings = td->panel_config->timings;
920 dssdev->panel.dsi_pix_fmt = OMAP_DSS_DSI_FMT_RGB888;
921 dssdev->caps = OMAP_DSS_DISPLAY_CAP_MANUAL_UPDATE |
922 OMAP_DSS_DISPLAY_CAP_TEAR_ELIM;
923
924 mutex_init(&td->lock);
925
926 atomic_set(&td->do_update, 0);
927
928 if (gpio_is_valid(td->reset_gpio)) {
929 r = devm_gpio_request_one(&dssdev->dev, td->reset_gpio,
930 GPIOF_OUT_INIT_LOW, "taal rst");
931 if (r) {
932 dev_err(&dssdev->dev, "failed to request reset gpio\n");
933 return r;
934 }
935 }
936
937 if (gpio_is_valid(td->ext_te_gpio)) {
938 r = devm_gpio_request_one(&dssdev->dev, td->ext_te_gpio,
939 GPIOF_IN, "taal irq");
940 if (r) {
941 dev_err(&dssdev->dev, "GPIO request failed\n");
942 return r;
943 }
944
945 r = devm_request_irq(&dssdev->dev, gpio_to_irq(td->ext_te_gpio),
946 taal_te_isr,
947 IRQF_TRIGGER_RISING,
948 "taal vsync", dssdev);
949
950 if (r) {
951 dev_err(&dssdev->dev, "IRQ request failed\n");
952 return r;
953 }
954
955 INIT_DEFERRABLE_WORK(&td->te_timeout_work,
956 taal_te_timeout_work_callback);
957
958 dev_dbg(&dssdev->dev, "Using GPIO TE\n");
959 }
960
961 td->workqueue = create_singlethread_workqueue("taal_esd");
962 if (td->workqueue == NULL) {
963 dev_err(&dssdev->dev, "can't create ESD workqueue\n");
964 return -ENOMEM;
965 }
966 INIT_DEFERRABLE_WORK(&td->esd_work, taal_esd_work);
967 INIT_DELAYED_WORK(&td->ulps_work, taal_ulps_work);
968
969 taal_hw_reset(dssdev);
970
971 if (td->use_dsi_backlight) {
972 memset(&props, 0, sizeof(struct backlight_properties));
973 props.max_brightness = 255;
974
975 props.type = BACKLIGHT_RAW;
976 bldev = backlight_device_register(dev_name(&dssdev->dev),
977 &dssdev->dev, dssdev, &taal_bl_ops, &props);
978 if (IS_ERR(bldev)) {
979 r = PTR_ERR(bldev);
980 goto err_bl;
981 }
982
983 td->bldev = bldev;
984
985 bldev->props.fb_blank = FB_BLANK_UNBLANK;
986 bldev->props.power = FB_BLANK_UNBLANK;
987 bldev->props.brightness = 255;
988
989 taal_bl_update_status(bldev);
990 }
991
992 r = omap_dsi_request_vc(dssdev, &td->channel);
993 if (r) {
994 dev_err(&dssdev->dev, "failed to get virtual channel\n");
995 goto err_req_vc;
996 }
997
998 r = omap_dsi_set_vc_id(dssdev, td->channel, TCH);
999 if (r) {
1000 dev_err(&dssdev->dev, "failed to set VC_ID\n");
1001 goto err_vc_id;
1002 }
1003
1004 r = sysfs_create_group(&dssdev->dev.kobj, &taal_attr_group);
1005 if (r) {
1006 dev_err(&dssdev->dev, "failed to create sysfs files\n");
1007 goto err_vc_id;
1008 }
1009
1010 return 0;
1011
1012 err_vc_id:
1013 omap_dsi_release_vc(dssdev, td->channel);
1014 err_req_vc:
1015 if (bldev != NULL)
1016 backlight_device_unregister(bldev);
1017 err_bl:
1018 destroy_workqueue(td->workqueue);
1019 return r;
1020 }
1021
1022 static void __exit taal_remove(struct omap_dss_device *dssdev)
1023 {
1024 struct taal_data *td = dev_get_drvdata(&dssdev->dev);
1025 struct backlight_device *bldev;
1026
1027 dev_dbg(&dssdev->dev, "remove\n");
1028
1029 sysfs_remove_group(&dssdev->dev.kobj, &taal_attr_group);
1030 omap_dsi_release_vc(dssdev, td->channel);
1031
1032 bldev = td->bldev;
1033 if (bldev != NULL) {
1034 bldev->props.power = FB_BLANK_POWERDOWN;
1035 taal_bl_update_status(bldev);
1036 backlight_device_unregister(bldev);
1037 }
1038
1039 taal_cancel_ulps_work(dssdev);
1040 taal_cancel_esd_work(dssdev);
1041 destroy_workqueue(td->workqueue);
1042
1043 /* reset, to be sure that the panel is in a valid state */
1044 taal_hw_reset(dssdev);
1045 }
1046
1047 static int taal_power_on(struct omap_dss_device *dssdev)
1048 {
1049 struct taal_data *td = dev_get_drvdata(&dssdev->dev);
1050 u8 id1, id2, id3;
1051 int r;
1052
1053 r = omapdss_dsi_configure_pins(dssdev, &td->pin_config);
1054 if (r) {
1055 dev_err(&dssdev->dev, "failed to configure DSI pins\n");
1056 goto err0;
1057 };
1058
1059 omapdss_dsi_set_size(dssdev, dssdev->panel.timings.x_res,
1060 dssdev->panel.timings.y_res);
1061 omapdss_dsi_set_pixel_format(dssdev, OMAP_DSS_DSI_FMT_RGB888);
1062 omapdss_dsi_set_operation_mode(dssdev, OMAP_DSS_DSI_CMD_MODE);
1063
1064 r = omapdss_dsi_set_clocks(dssdev, 216000000, 10000000);
1065 if (r) {
1066 dev_err(&dssdev->dev, "failed to set HS and LP clocks\n");
1067 goto err0;
1068 }
1069
1070 r = omapdss_dsi_display_enable(dssdev);
1071 if (r) {
1072 dev_err(&dssdev->dev, "failed to enable DSI\n");
1073 goto err0;
1074 }
1075
1076 taal_hw_reset(dssdev);
1077
1078 omapdss_dsi_vc_enable_hs(dssdev, td->channel, false);
1079
1080 r = taal_sleep_out(td);
1081 if (r)
1082 goto err;
1083
1084 r = taal_get_id(td, &id1, &id2, &id3);
1085 if (r)
1086 goto err;
1087
1088 /* on early Taal revisions CABC is broken */
1089 if (td->panel_config->type == PANEL_TAAL &&
1090 (id2 == 0x00 || id2 == 0xff || id2 == 0x81))
1091 td->cabc_broken = true;
1092
1093 r = taal_dcs_write_1(td, DCS_BRIGHTNESS, 0xff);
1094 if (r)
1095 goto err;
1096
1097 r = taal_dcs_write_1(td, DCS_CTRL_DISPLAY,
1098 (1<<2) | (1<<5)); /* BL | BCTRL */
1099 if (r)
1100 goto err;
1101
1102 r = taal_dcs_write_1(td, MIPI_DCS_SET_PIXEL_FORMAT,
1103 MIPI_DCS_PIXEL_FMT_24BIT);
1104 if (r)
1105 goto err;
1106
1107 r = taal_set_addr_mode(td, td->rotate, td->mirror);
1108 if (r)
1109 goto err;
1110
1111 if (!td->cabc_broken) {
1112 r = taal_dcs_write_1(td, DCS_WRITE_CABC, td->cabc_mode);
1113 if (r)
1114 goto err;
1115 }
1116
1117 r = taal_dcs_write_0(td, MIPI_DCS_SET_DISPLAY_ON);
1118 if (r)
1119 goto err;
1120
1121 r = _taal_enable_te(dssdev, td->te_enabled);
1122 if (r)
1123 goto err;
1124
1125 r = dsi_enable_video_output(dssdev, td->channel);
1126 if (r)
1127 goto err;
1128
1129 td->enabled = 1;
1130
1131 if (!td->intro_printed) {
1132 dev_info(&dssdev->dev, "%s panel revision %02x.%02x.%02x\n",
1133 td->panel_config->name, id1, id2, id3);
1134 if (td->cabc_broken)
1135 dev_info(&dssdev->dev,
1136 "old Taal version, CABC disabled\n");
1137 td->intro_printed = true;
1138 }
1139
1140 omapdss_dsi_vc_enable_hs(dssdev, td->channel, true);
1141
1142 return 0;
1143 err:
1144 dev_err(&dssdev->dev, "error while enabling panel, issuing HW reset\n");
1145
1146 taal_hw_reset(dssdev);
1147
1148 omapdss_dsi_display_disable(dssdev, true, false);
1149 err0:
1150 return r;
1151 }
1152
1153 static void taal_power_off(struct omap_dss_device *dssdev)
1154 {
1155 struct taal_data *td = dev_get_drvdata(&dssdev->dev);
1156 int r;
1157
1158 dsi_disable_video_output(dssdev, td->channel);
1159
1160 r = taal_dcs_write_0(td, MIPI_DCS_SET_DISPLAY_OFF);
1161 if (!r)
1162 r = taal_sleep_in(td);
1163
1164 if (r) {
1165 dev_err(&dssdev->dev,
1166 "error disabling panel, issuing HW reset\n");
1167 taal_hw_reset(dssdev);
1168 }
1169
1170 omapdss_dsi_display_disable(dssdev, true, false);
1171
1172 td->enabled = 0;
1173 }
1174
1175 static int taal_panel_reset(struct omap_dss_device *dssdev)
1176 {
1177 dev_err(&dssdev->dev, "performing LCD reset\n");
1178
1179 taal_power_off(dssdev);
1180 taal_hw_reset(dssdev);
1181 return taal_power_on(dssdev);
1182 }
1183
1184 static int taal_enable(struct omap_dss_device *dssdev)
1185 {
1186 struct taal_data *td = dev_get_drvdata(&dssdev->dev);
1187 int r;
1188
1189 dev_dbg(&dssdev->dev, "enable\n");
1190
1191 mutex_lock(&td->lock);
1192
1193 if (dssdev->state != OMAP_DSS_DISPLAY_DISABLED) {
1194 r = -EINVAL;
1195 goto err;
1196 }
1197
1198 dsi_bus_lock(dssdev);
1199
1200 r = taal_power_on(dssdev);
1201
1202 dsi_bus_unlock(dssdev);
1203
1204 if (r)
1205 goto err;
1206
1207 taal_queue_esd_work(dssdev);
1208
1209 dssdev->state = OMAP_DSS_DISPLAY_ACTIVE;
1210
1211 mutex_unlock(&td->lock);
1212
1213 return 0;
1214 err:
1215 dev_dbg(&dssdev->dev, "enable failed\n");
1216 mutex_unlock(&td->lock);
1217 return r;
1218 }
1219
1220 static void taal_disable(struct omap_dss_device *dssdev)
1221 {
1222 struct taal_data *td = dev_get_drvdata(&dssdev->dev);
1223
1224 dev_dbg(&dssdev->dev, "disable\n");
1225
1226 mutex_lock(&td->lock);
1227
1228 taal_cancel_ulps_work(dssdev);
1229 taal_cancel_esd_work(dssdev);
1230
1231 dsi_bus_lock(dssdev);
1232
1233 if (dssdev->state == OMAP_DSS_DISPLAY_ACTIVE) {
1234 int r;
1235
1236 r = taal_wake_up(dssdev);
1237 if (!r)
1238 taal_power_off(dssdev);
1239 }
1240
1241 dsi_bus_unlock(dssdev);
1242
1243 dssdev->state = OMAP_DSS_DISPLAY_DISABLED;
1244
1245 mutex_unlock(&td->lock);
1246 }
1247
1248 static int taal_suspend(struct omap_dss_device *dssdev)
1249 {
1250 struct taal_data *td = dev_get_drvdata(&dssdev->dev);
1251 int r;
1252
1253 dev_dbg(&dssdev->dev, "suspend\n");
1254
1255 mutex_lock(&td->lock);
1256
1257 if (dssdev->state != OMAP_DSS_DISPLAY_ACTIVE) {
1258 r = -EINVAL;
1259 goto err;
1260 }
1261
1262 taal_cancel_ulps_work(dssdev);
1263 taal_cancel_esd_work(dssdev);
1264
1265 dsi_bus_lock(dssdev);
1266
1267 r = taal_wake_up(dssdev);
1268 if (!r)
1269 taal_power_off(dssdev);
1270
1271 dsi_bus_unlock(dssdev);
1272
1273 dssdev->state = OMAP_DSS_DISPLAY_SUSPENDED;
1274
1275 mutex_unlock(&td->lock);
1276
1277 return 0;
1278 err:
1279 mutex_unlock(&td->lock);
1280 return r;
1281 }
1282
1283 static int taal_resume(struct omap_dss_device *dssdev)
1284 {
1285 struct taal_data *td = dev_get_drvdata(&dssdev->dev);
1286 int r;
1287
1288 dev_dbg(&dssdev->dev, "resume\n");
1289
1290 mutex_lock(&td->lock);
1291
1292 if (dssdev->state != OMAP_DSS_DISPLAY_SUSPENDED) {
1293 r = -EINVAL;
1294 goto err;
1295 }
1296
1297 dsi_bus_lock(dssdev);
1298
1299 r = taal_power_on(dssdev);
1300
1301 dsi_bus_unlock(dssdev);
1302
1303 if (r) {
1304 dssdev->state = OMAP_DSS_DISPLAY_DISABLED;
1305 } else {
1306 dssdev->state = OMAP_DSS_DISPLAY_ACTIVE;
1307 taal_queue_esd_work(dssdev);
1308 }
1309
1310 mutex_unlock(&td->lock);
1311
1312 return r;
1313 err:
1314 mutex_unlock(&td->lock);
1315 return r;
1316 }
1317
1318 static void taal_framedone_cb(int err, void *data)
1319 {
1320 struct omap_dss_device *dssdev = data;
1321 dev_dbg(&dssdev->dev, "framedone, err %d\n", err);
1322 dsi_bus_unlock(dssdev);
1323 }
1324
1325 static irqreturn_t taal_te_isr(int irq, void *data)
1326 {
1327 struct omap_dss_device *dssdev = data;
1328 struct taal_data *td = dev_get_drvdata(&dssdev->dev);
1329 int old;
1330 int r;
1331
1332 old = atomic_cmpxchg(&td->do_update, 1, 0);
1333
1334 if (old) {
1335 cancel_delayed_work(&td->te_timeout_work);
1336
1337 r = omap_dsi_update(dssdev, td->channel, taal_framedone_cb,
1338 dssdev);
1339 if (r)
1340 goto err;
1341 }
1342
1343 return IRQ_HANDLED;
1344 err:
1345 dev_err(&dssdev->dev, "start update failed\n");
1346 dsi_bus_unlock(dssdev);
1347 return IRQ_HANDLED;
1348 }
1349
1350 static void taal_te_timeout_work_callback(struct work_struct *work)
1351 {
1352 struct taal_data *td = container_of(work, struct taal_data,
1353 te_timeout_work.work);
1354 struct omap_dss_device *dssdev = td->dssdev;
1355
1356 dev_err(&dssdev->dev, "TE not received for 250ms!\n");
1357
1358 atomic_set(&td->do_update, 0);
1359 dsi_bus_unlock(dssdev);
1360 }
1361
1362 static int taal_update(struct omap_dss_device *dssdev,
1363 u16 x, u16 y, u16 w, u16 h)
1364 {
1365 struct taal_data *td = dev_get_drvdata(&dssdev->dev);
1366 int r;
1367
1368 dev_dbg(&dssdev->dev, "update %d, %d, %d x %d\n", x, y, w, h);
1369
1370 mutex_lock(&td->lock);
1371 dsi_bus_lock(dssdev);
1372
1373 r = taal_wake_up(dssdev);
1374 if (r)
1375 goto err;
1376
1377 if (!td->enabled) {
1378 r = 0;
1379 goto err;
1380 }
1381
1382 /* XXX no need to send this every frame, but dsi break if not done */
1383 r = taal_set_update_window(td, 0, 0,
1384 td->panel_config->timings.x_res,
1385 td->panel_config->timings.y_res);
1386 if (r)
1387 goto err;
1388
1389 if (td->te_enabled && gpio_is_valid(td->ext_te_gpio)) {
1390 schedule_delayed_work(&td->te_timeout_work,
1391 msecs_to_jiffies(250));
1392 atomic_set(&td->do_update, 1);
1393 } else {
1394 r = omap_dsi_update(dssdev, td->channel, taal_framedone_cb,
1395 dssdev);
1396 if (r)
1397 goto err;
1398 }
1399
1400 /* note: no bus_unlock here. unlock is in framedone_cb */
1401 mutex_unlock(&td->lock);
1402 return 0;
1403 err:
1404 dsi_bus_unlock(dssdev);
1405 mutex_unlock(&td->lock);
1406 return r;
1407 }
1408
1409 static int taal_sync(struct omap_dss_device *dssdev)
1410 {
1411 struct taal_data *td = dev_get_drvdata(&dssdev->dev);
1412
1413 dev_dbg(&dssdev->dev, "sync\n");
1414
1415 mutex_lock(&td->lock);
1416 dsi_bus_lock(dssdev);
1417 dsi_bus_unlock(dssdev);
1418 mutex_unlock(&td->lock);
1419
1420 dev_dbg(&dssdev->dev, "sync done\n");
1421
1422 return 0;
1423 }
1424
1425 static int _taal_enable_te(struct omap_dss_device *dssdev, bool enable)
1426 {
1427 struct taal_data *td = dev_get_drvdata(&dssdev->dev);
1428 int r;
1429
1430 if (enable)
1431 r = taal_dcs_write_1(td, MIPI_DCS_SET_TEAR_ON, 0);
1432 else
1433 r = taal_dcs_write_0(td, MIPI_DCS_SET_TEAR_OFF);
1434
1435 if (!gpio_is_valid(td->ext_te_gpio))
1436 omapdss_dsi_enable_te(dssdev, enable);
1437
1438 if (td->panel_config->sleep.enable_te)
1439 msleep(td->panel_config->sleep.enable_te);
1440
1441 return r;
1442 }
1443
1444 static int taal_enable_te(struct omap_dss_device *dssdev, bool enable)
1445 {
1446 struct taal_data *td = dev_get_drvdata(&dssdev->dev);
1447 int r;
1448
1449 mutex_lock(&td->lock);
1450
1451 if (td->te_enabled == enable)
1452 goto end;
1453
1454 dsi_bus_lock(dssdev);
1455
1456 if (td->enabled) {
1457 r = taal_wake_up(dssdev);
1458 if (r)
1459 goto err;
1460
1461 r = _taal_enable_te(dssdev, enable);
1462 if (r)
1463 goto err;
1464 }
1465
1466 td->te_enabled = enable;
1467
1468 dsi_bus_unlock(dssdev);
1469 end:
1470 mutex_unlock(&td->lock);
1471
1472 return 0;
1473 err:
1474 dsi_bus_unlock(dssdev);
1475 mutex_unlock(&td->lock);
1476
1477 return r;
1478 }
1479
1480 static int taal_get_te(struct omap_dss_device *dssdev)
1481 {
1482 struct taal_data *td = dev_get_drvdata(&dssdev->dev);
1483 int r;
1484
1485 mutex_lock(&td->lock);
1486 r = td->te_enabled;
1487 mutex_unlock(&td->lock);
1488
1489 return r;
1490 }
1491
1492 static int taal_rotate(struct omap_dss_device *dssdev, u8 rotate)
1493 {
1494 struct taal_data *td = dev_get_drvdata(&dssdev->dev);
1495 u16 dw, dh;
1496 int r;
1497
1498 dev_dbg(&dssdev->dev, "rotate %d\n", rotate);
1499
1500 mutex_lock(&td->lock);
1501
1502 if (td->rotate == rotate)
1503 goto end;
1504
1505 dsi_bus_lock(dssdev);
1506
1507 if (td->enabled) {
1508 r = taal_wake_up(dssdev);
1509 if (r)
1510 goto err;
1511
1512 r = taal_set_addr_mode(td, rotate, td->mirror);
1513 if (r)
1514 goto err;
1515 }
1516
1517 if (rotate == 0 || rotate == 2) {
1518 dw = dssdev->panel.timings.x_res;
1519 dh = dssdev->panel.timings.y_res;
1520 } else {
1521 dw = dssdev->panel.timings.y_res;
1522 dh = dssdev->panel.timings.x_res;
1523 }
1524
1525 omapdss_dsi_set_size(dssdev, dw, dh);
1526
1527 td->rotate = rotate;
1528
1529 dsi_bus_unlock(dssdev);
1530 end:
1531 mutex_unlock(&td->lock);
1532 return 0;
1533 err:
1534 dsi_bus_unlock(dssdev);
1535 mutex_unlock(&td->lock);
1536 return r;
1537 }
1538
1539 static u8 taal_get_rotate(struct omap_dss_device *dssdev)
1540 {
1541 struct taal_data *td = dev_get_drvdata(&dssdev->dev);
1542 int r;
1543
1544 mutex_lock(&td->lock);
1545 r = td->rotate;
1546 mutex_unlock(&td->lock);
1547
1548 return r;
1549 }
1550
1551 static int taal_mirror(struct omap_dss_device *dssdev, bool enable)
1552 {
1553 struct taal_data *td = dev_get_drvdata(&dssdev->dev);
1554 int r;
1555
1556 dev_dbg(&dssdev->dev, "mirror %d\n", enable);
1557
1558 mutex_lock(&td->lock);
1559
1560 if (td->mirror == enable)
1561 goto end;
1562
1563 dsi_bus_lock(dssdev);
1564 if (td->enabled) {
1565 r = taal_wake_up(dssdev);
1566 if (r)
1567 goto err;
1568
1569 r = taal_set_addr_mode(td, td->rotate, enable);
1570 if (r)
1571 goto err;
1572 }
1573
1574 td->mirror = enable;
1575
1576 dsi_bus_unlock(dssdev);
1577 end:
1578 mutex_unlock(&td->lock);
1579 return 0;
1580 err:
1581 dsi_bus_unlock(dssdev);
1582 mutex_unlock(&td->lock);
1583 return r;
1584 }
1585
1586 static bool taal_get_mirror(struct omap_dss_device *dssdev)
1587 {
1588 struct taal_data *td = dev_get_drvdata(&dssdev->dev);
1589 int r;
1590
1591 mutex_lock(&td->lock);
1592 r = td->mirror;
1593 mutex_unlock(&td->lock);
1594
1595 return r;
1596 }
1597
1598 static int taal_run_test(struct omap_dss_device *dssdev, int test_num)
1599 {
1600 struct taal_data *td = dev_get_drvdata(&dssdev->dev);
1601 u8 id1, id2, id3;
1602 int r;
1603
1604 mutex_lock(&td->lock);
1605
1606 if (!td->enabled) {
1607 r = -ENODEV;
1608 goto err1;
1609 }
1610
1611 dsi_bus_lock(dssdev);
1612
1613 r = taal_wake_up(dssdev);
1614 if (r)
1615 goto err2;
1616
1617 r = taal_dcs_read_1(td, DCS_GET_ID1, &id1);
1618 if (r)
1619 goto err2;
1620 r = taal_dcs_read_1(td, DCS_GET_ID2, &id2);
1621 if (r)
1622 goto err2;
1623 r = taal_dcs_read_1(td, DCS_GET_ID3, &id3);
1624 if (r)
1625 goto err2;
1626
1627 dsi_bus_unlock(dssdev);
1628 mutex_unlock(&td->lock);
1629 return 0;
1630 err2:
1631 dsi_bus_unlock(dssdev);
1632 err1:
1633 mutex_unlock(&td->lock);
1634 return r;
1635 }
1636
1637 static int taal_memory_read(struct omap_dss_device *dssdev,
1638 void *buf, size_t size,
1639 u16 x, u16 y, u16 w, u16 h)
1640 {
1641 int r;
1642 int first = 1;
1643 int plen;
1644 unsigned buf_used = 0;
1645 struct taal_data *td = dev_get_drvdata(&dssdev->dev);
1646
1647 if (size < w * h * 3)
1648 return -ENOMEM;
1649
1650 mutex_lock(&td->lock);
1651
1652 if (!td->enabled) {
1653 r = -ENODEV;
1654 goto err1;
1655 }
1656
1657 size = min(w * h * 3,
1658 dssdev->panel.timings.x_res *
1659 dssdev->panel.timings.y_res * 3);
1660
1661 dsi_bus_lock(dssdev);
1662
1663 r = taal_wake_up(dssdev);
1664 if (r)
1665 goto err2;
1666
1667 /* plen 1 or 2 goes into short packet. until checksum error is fixed,
1668 * use short packets. plen 32 works, but bigger packets seem to cause
1669 * an error. */
1670 if (size % 2)
1671 plen = 1;
1672 else
1673 plen = 2;
1674
1675 taal_set_update_window(td, x, y, w, h);
1676
1677 r = dsi_vc_set_max_rx_packet_size(dssdev, td->channel, plen);
1678 if (r)
1679 goto err2;
1680
1681 while (buf_used < size) {
1682 u8 dcs_cmd = first ? 0x2e : 0x3e;
1683 first = 0;
1684
1685 r = dsi_vc_dcs_read(dssdev, td->channel, dcs_cmd,
1686 buf + buf_used, size - buf_used);
1687
1688 if (r < 0) {
1689 dev_err(&dssdev->dev, "read error\n");
1690 goto err3;
1691 }
1692
1693 buf_used += r;
1694
1695 if (r < plen) {
1696 dev_err(&dssdev->dev, "short read\n");
1697 break;
1698 }
1699
1700 if (signal_pending(current)) {
1701 dev_err(&dssdev->dev, "signal pending, "
1702 "aborting memory read\n");
1703 r = -ERESTARTSYS;
1704 goto err3;
1705 }
1706 }
1707
1708 r = buf_used;
1709
1710 err3:
1711 dsi_vc_set_max_rx_packet_size(dssdev, td->channel, 1);
1712 err2:
1713 dsi_bus_unlock(dssdev);
1714 err1:
1715 mutex_unlock(&td->lock);
1716 return r;
1717 }
1718
1719 static void taal_ulps_work(struct work_struct *work)
1720 {
1721 struct taal_data *td = container_of(work, struct taal_data,
1722 ulps_work.work);
1723 struct omap_dss_device *dssdev = td->dssdev;
1724
1725 mutex_lock(&td->lock);
1726
1727 if (dssdev->state != OMAP_DSS_DISPLAY_ACTIVE || !td->enabled) {
1728 mutex_unlock(&td->lock);
1729 return;
1730 }
1731
1732 dsi_bus_lock(dssdev);
1733
1734 taal_enter_ulps(dssdev);
1735
1736 dsi_bus_unlock(dssdev);
1737 mutex_unlock(&td->lock);
1738 }
1739
1740 static void taal_esd_work(struct work_struct *work)
1741 {
1742 struct taal_data *td = container_of(work, struct taal_data,
1743 esd_work.work);
1744 struct omap_dss_device *dssdev = td->dssdev;
1745 u8 state1, state2;
1746 int r;
1747
1748 mutex_lock(&td->lock);
1749
1750 if (!td->enabled) {
1751 mutex_unlock(&td->lock);
1752 return;
1753 }
1754
1755 dsi_bus_lock(dssdev);
1756
1757 r = taal_wake_up(dssdev);
1758 if (r) {
1759 dev_err(&dssdev->dev, "failed to exit ULPS\n");
1760 goto err;
1761 }
1762
1763 r = taal_dcs_read_1(td, MIPI_DCS_GET_DIAGNOSTIC_RESULT, &state1);
1764 if (r) {
1765 dev_err(&dssdev->dev, "failed to read Taal status\n");
1766 goto err;
1767 }
1768
1769 /* Run self diagnostics */
1770 r = taal_sleep_out(td);
1771 if (r) {
1772 dev_err(&dssdev->dev, "failed to run Taal self-diagnostics\n");
1773 goto err;
1774 }
1775
1776 r = taal_dcs_read_1(td, MIPI_DCS_GET_DIAGNOSTIC_RESULT, &state2);
1777 if (r) {
1778 dev_err(&dssdev->dev, "failed to read Taal status\n");
1779 goto err;
1780 }
1781
1782 /* Each sleep out command will trigger a self diagnostic and flip
1783 * Bit6 if the test passes.
1784 */
1785 if (!((state1 ^ state2) & (1 << 6))) {
1786 dev_err(&dssdev->dev, "LCD self diagnostics failed\n");
1787 goto err;
1788 }
1789 /* Self-diagnostics result is also shown on TE GPIO line. We need
1790 * to re-enable TE after self diagnostics */
1791 if (td->te_enabled && gpio_is_valid(td->ext_te_gpio)) {
1792 r = taal_dcs_write_1(td, MIPI_DCS_SET_TEAR_ON, 0);
1793 if (r)
1794 goto err;
1795 }
1796
1797 dsi_bus_unlock(dssdev);
1798
1799 taal_queue_esd_work(dssdev);
1800
1801 mutex_unlock(&td->lock);
1802 return;
1803 err:
1804 dev_err(&dssdev->dev, "performing LCD reset\n");
1805
1806 taal_panel_reset(dssdev);
1807
1808 dsi_bus_unlock(dssdev);
1809
1810 taal_queue_esd_work(dssdev);
1811
1812 mutex_unlock(&td->lock);
1813 }
1814
1815 static struct omap_dss_driver taal_driver = {
1816 .probe = taal_probe,
1817 .remove = __exit_p(taal_remove),
1818
1819 .enable = taal_enable,
1820 .disable = taal_disable,
1821 .suspend = taal_suspend,
1822 .resume = taal_resume,
1823
1824 .update = taal_update,
1825 .sync = taal_sync,
1826
1827 .get_resolution = taal_get_resolution,
1828 .get_recommended_bpp = omapdss_default_get_recommended_bpp,
1829
1830 .enable_te = taal_enable_te,
1831 .get_te = taal_get_te,
1832
1833 .set_rotate = taal_rotate,
1834 .get_rotate = taal_get_rotate,
1835 .set_mirror = taal_mirror,
1836 .get_mirror = taal_get_mirror,
1837 .run_test = taal_run_test,
1838 .memory_read = taal_memory_read,
1839
1840 .driver = {
1841 .name = "taal",
1842 .owner = THIS_MODULE,
1843 },
1844 };
1845
1846 static int __init taal_init(void)
1847 {
1848 omap_dss_register_driver(&taal_driver);
1849
1850 return 0;
1851 }
1852
1853 static void __exit taal_exit(void)
1854 {
1855 omap_dss_unregister_driver(&taal_driver);
1856 }
1857
1858 module_init(taal_init);
1859 module_exit(taal_exit);
1860
1861 MODULE_AUTHOR("Tomi Valkeinen <tomi.valkeinen@nokia.com>");
1862 MODULE_DESCRIPTION("Taal Driver");
1863 MODULE_LICENSE("GPL");
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