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Merge tag 'v3.5-rc6' into irqdomain/next
[deliverable/linux.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 bool enabled;
125 u8 rotate;
126 bool mirror;
127
128 bool te_enabled;
129
130 atomic_t do_update;
131 int channel;
132
133 struct delayed_work te_timeout_work;
134
135 bool cabc_broken;
136 unsigned cabc_mode;
137
138 bool intro_printed;
139
140 struct workqueue_struct *workqueue;
141
142 struct delayed_work esd_work;
143 unsigned esd_interval;
144
145 bool ulps_enabled;
146 unsigned ulps_timeout;
147 struct delayed_work ulps_work;
148
149 struct panel_config *panel_config;
150 };
151
152 static inline struct nokia_dsi_panel_data
153 *get_panel_data(const struct omap_dss_device *dssdev)
154 {
155 return (struct nokia_dsi_panel_data *) dssdev->data;
156 }
157
158 static void taal_esd_work(struct work_struct *work);
159 static void taal_ulps_work(struct work_struct *work);
160
161 static void hw_guard_start(struct taal_data *td, int guard_msec)
162 {
163 td->hw_guard_wait = msecs_to_jiffies(guard_msec);
164 td->hw_guard_end = jiffies + td->hw_guard_wait;
165 }
166
167 static void hw_guard_wait(struct taal_data *td)
168 {
169 unsigned long wait = td->hw_guard_end - jiffies;
170
171 if ((long)wait > 0 && wait <= td->hw_guard_wait) {
172 set_current_state(TASK_UNINTERRUPTIBLE);
173 schedule_timeout(wait);
174 }
175 }
176
177 static int taal_dcs_read_1(struct taal_data *td, u8 dcs_cmd, u8 *data)
178 {
179 int r;
180 u8 buf[1];
181
182 r = dsi_vc_dcs_read(td->dssdev, td->channel, dcs_cmd, buf, 1);
183
184 if (r < 0)
185 return r;
186
187 *data = buf[0];
188
189 return 0;
190 }
191
192 static int taal_dcs_write_0(struct taal_data *td, u8 dcs_cmd)
193 {
194 return dsi_vc_dcs_write(td->dssdev, td->channel, &dcs_cmd, 1);
195 }
196
197 static int taal_dcs_write_1(struct taal_data *td, u8 dcs_cmd, u8 param)
198 {
199 u8 buf[2];
200 buf[0] = dcs_cmd;
201 buf[1] = param;
202 return dsi_vc_dcs_write(td->dssdev, td->channel, buf, 2);
203 }
204
205 static int taal_sleep_in(struct taal_data *td)
206
207 {
208 u8 cmd;
209 int r;
210
211 hw_guard_wait(td);
212
213 cmd = MIPI_DCS_ENTER_SLEEP_MODE;
214 r = dsi_vc_dcs_write_nosync(td->dssdev, td->channel, &cmd, 1);
215 if (r)
216 return r;
217
218 hw_guard_start(td, 120);
219
220 if (td->panel_config->sleep.sleep_in)
221 msleep(td->panel_config->sleep.sleep_in);
222
223 return 0;
224 }
225
226 static int taal_sleep_out(struct taal_data *td)
227 {
228 int r;
229
230 hw_guard_wait(td);
231
232 r = taal_dcs_write_0(td, MIPI_DCS_EXIT_SLEEP_MODE);
233 if (r)
234 return r;
235
236 hw_guard_start(td, 120);
237
238 if (td->panel_config->sleep.sleep_out)
239 msleep(td->panel_config->sleep.sleep_out);
240
241 return 0;
242 }
243
244 static int taal_get_id(struct taal_data *td, u8 *id1, u8 *id2, u8 *id3)
245 {
246 int r;
247
248 r = taal_dcs_read_1(td, DCS_GET_ID1, id1);
249 if (r)
250 return r;
251 r = taal_dcs_read_1(td, DCS_GET_ID2, id2);
252 if (r)
253 return r;
254 r = taal_dcs_read_1(td, DCS_GET_ID3, id3);
255 if (r)
256 return r;
257
258 return 0;
259 }
260
261 static int taal_set_addr_mode(struct taal_data *td, u8 rotate, bool mirror)
262 {
263 int r;
264 u8 mode;
265 int b5, b6, b7;
266
267 r = taal_dcs_read_1(td, MIPI_DCS_GET_ADDRESS_MODE, &mode);
268 if (r)
269 return r;
270
271 switch (rotate) {
272 default:
273 case 0:
274 b7 = 0;
275 b6 = 0;
276 b5 = 0;
277 break;
278 case 1:
279 b7 = 0;
280 b6 = 1;
281 b5 = 1;
282 break;
283 case 2:
284 b7 = 1;
285 b6 = 1;
286 b5 = 0;
287 break;
288 case 3:
289 b7 = 1;
290 b6 = 0;
291 b5 = 1;
292 break;
293 }
294
295 if (mirror)
296 b6 = !b6;
297
298 mode &= ~((1<<7) | (1<<6) | (1<<5));
299 mode |= (b7 << 7) | (b6 << 6) | (b5 << 5);
300
301 return taal_dcs_write_1(td, MIPI_DCS_SET_ADDRESS_MODE, mode);
302 }
303
304 static int taal_set_update_window(struct taal_data *td,
305 u16 x, u16 y, u16 w, u16 h)
306 {
307 int r;
308 u16 x1 = x;
309 u16 x2 = x + w - 1;
310 u16 y1 = y;
311 u16 y2 = y + h - 1;
312
313 u8 buf[5];
314 buf[0] = MIPI_DCS_SET_COLUMN_ADDRESS;
315 buf[1] = (x1 >> 8) & 0xff;
316 buf[2] = (x1 >> 0) & 0xff;
317 buf[3] = (x2 >> 8) & 0xff;
318 buf[4] = (x2 >> 0) & 0xff;
319
320 r = dsi_vc_dcs_write_nosync(td->dssdev, td->channel, buf, sizeof(buf));
321 if (r)
322 return r;
323
324 buf[0] = MIPI_DCS_SET_PAGE_ADDRESS;
325 buf[1] = (y1 >> 8) & 0xff;
326 buf[2] = (y1 >> 0) & 0xff;
327 buf[3] = (y2 >> 8) & 0xff;
328 buf[4] = (y2 >> 0) & 0xff;
329
330 r = dsi_vc_dcs_write_nosync(td->dssdev, td->channel, buf, sizeof(buf));
331 if (r)
332 return r;
333
334 dsi_vc_send_bta_sync(td->dssdev, td->channel);
335
336 return r;
337 }
338
339 static void taal_queue_esd_work(struct omap_dss_device *dssdev)
340 {
341 struct taal_data *td = dev_get_drvdata(&dssdev->dev);
342
343 if (td->esd_interval > 0)
344 queue_delayed_work(td->workqueue, &td->esd_work,
345 msecs_to_jiffies(td->esd_interval));
346 }
347
348 static void taal_cancel_esd_work(struct omap_dss_device *dssdev)
349 {
350 struct taal_data *td = dev_get_drvdata(&dssdev->dev);
351
352 cancel_delayed_work(&td->esd_work);
353 }
354
355 static void taal_queue_ulps_work(struct omap_dss_device *dssdev)
356 {
357 struct taal_data *td = dev_get_drvdata(&dssdev->dev);
358
359 if (td->ulps_timeout > 0)
360 queue_delayed_work(td->workqueue, &td->ulps_work,
361 msecs_to_jiffies(td->ulps_timeout));
362 }
363
364 static void taal_cancel_ulps_work(struct omap_dss_device *dssdev)
365 {
366 struct taal_data *td = dev_get_drvdata(&dssdev->dev);
367
368 cancel_delayed_work(&td->ulps_work);
369 }
370
371 static int taal_enter_ulps(struct omap_dss_device *dssdev)
372 {
373 struct taal_data *td = dev_get_drvdata(&dssdev->dev);
374 struct nokia_dsi_panel_data *panel_data = get_panel_data(dssdev);
375 int r;
376
377 if (td->ulps_enabled)
378 return 0;
379
380 taal_cancel_ulps_work(dssdev);
381
382 r = _taal_enable_te(dssdev, false);
383 if (r)
384 goto err;
385
386 disable_irq(gpio_to_irq(panel_data->ext_te_gpio));
387
388 omapdss_dsi_display_disable(dssdev, false, true);
389
390 td->ulps_enabled = true;
391
392 return 0;
393
394 err:
395 dev_err(&dssdev->dev, "enter ULPS failed");
396 taal_panel_reset(dssdev);
397
398 td->ulps_enabled = false;
399
400 taal_queue_ulps_work(dssdev);
401
402 return r;
403 }
404
405 static int taal_exit_ulps(struct omap_dss_device *dssdev)
406 {
407 struct taal_data *td = dev_get_drvdata(&dssdev->dev);
408 struct nokia_dsi_panel_data *panel_data = get_panel_data(dssdev);
409 int r;
410
411 if (!td->ulps_enabled)
412 return 0;
413
414 r = omapdss_dsi_display_enable(dssdev);
415 if (r) {
416 dev_err(&dssdev->dev, "failed to enable DSI\n");
417 goto err1;
418 }
419
420 omapdss_dsi_vc_enable_hs(dssdev, td->channel, true);
421
422 r = _taal_enable_te(dssdev, true);
423 if (r) {
424 dev_err(&dssdev->dev, "failed to re-enable TE");
425 goto err2;
426 }
427
428 enable_irq(gpio_to_irq(panel_data->ext_te_gpio));
429
430 taal_queue_ulps_work(dssdev);
431
432 td->ulps_enabled = false;
433
434 return 0;
435
436 err2:
437 dev_err(&dssdev->dev, "failed to exit ULPS");
438
439 r = taal_panel_reset(dssdev);
440 if (!r) {
441 enable_irq(gpio_to_irq(panel_data->ext_te_gpio));
442 td->ulps_enabled = false;
443 }
444 err1:
445 taal_queue_ulps_work(dssdev);
446
447 return r;
448 }
449
450 static int taal_wake_up(struct omap_dss_device *dssdev)
451 {
452 struct taal_data *td = dev_get_drvdata(&dssdev->dev);
453
454 if (td->ulps_enabled)
455 return taal_exit_ulps(dssdev);
456
457 taal_cancel_ulps_work(dssdev);
458 taal_queue_ulps_work(dssdev);
459 return 0;
460 }
461
462 static int taal_bl_update_status(struct backlight_device *dev)
463 {
464 struct omap_dss_device *dssdev = dev_get_drvdata(&dev->dev);
465 struct taal_data *td = dev_get_drvdata(&dssdev->dev);
466 int r;
467 int level;
468
469 if (dev->props.fb_blank == FB_BLANK_UNBLANK &&
470 dev->props.power == FB_BLANK_UNBLANK)
471 level = dev->props.brightness;
472 else
473 level = 0;
474
475 dev_dbg(&dssdev->dev, "update brightness to %d\n", level);
476
477 mutex_lock(&td->lock);
478
479 if (td->enabled) {
480 dsi_bus_lock(dssdev);
481
482 r = taal_wake_up(dssdev);
483 if (!r)
484 r = taal_dcs_write_1(td, DCS_BRIGHTNESS, level);
485
486 dsi_bus_unlock(dssdev);
487 } else {
488 r = 0;
489 }
490
491 mutex_unlock(&td->lock);
492
493 return r;
494 }
495
496 static int taal_bl_get_intensity(struct backlight_device *dev)
497 {
498 if (dev->props.fb_blank == FB_BLANK_UNBLANK &&
499 dev->props.power == FB_BLANK_UNBLANK)
500 return dev->props.brightness;
501
502 return 0;
503 }
504
505 static const struct backlight_ops taal_bl_ops = {
506 .get_brightness = taal_bl_get_intensity,
507 .update_status = taal_bl_update_status,
508 };
509
510 static void taal_get_resolution(struct omap_dss_device *dssdev,
511 u16 *xres, u16 *yres)
512 {
513 struct taal_data *td = dev_get_drvdata(&dssdev->dev);
514
515 if (td->rotate == 0 || td->rotate == 2) {
516 *xres = dssdev->panel.timings.x_res;
517 *yres = dssdev->panel.timings.y_res;
518 } else {
519 *yres = dssdev->panel.timings.x_res;
520 *xres = dssdev->panel.timings.y_res;
521 }
522 }
523
524 static ssize_t taal_num_errors_show(struct device *dev,
525 struct device_attribute *attr, char *buf)
526 {
527 struct omap_dss_device *dssdev = to_dss_device(dev);
528 struct taal_data *td = dev_get_drvdata(&dssdev->dev);
529 u8 errors = 0;
530 int r;
531
532 mutex_lock(&td->lock);
533
534 if (td->enabled) {
535 dsi_bus_lock(dssdev);
536
537 r = taal_wake_up(dssdev);
538 if (!r)
539 r = taal_dcs_read_1(td, DCS_READ_NUM_ERRORS, &errors);
540
541 dsi_bus_unlock(dssdev);
542 } else {
543 r = -ENODEV;
544 }
545
546 mutex_unlock(&td->lock);
547
548 if (r)
549 return r;
550
551 return snprintf(buf, PAGE_SIZE, "%d\n", errors);
552 }
553
554 static ssize_t taal_hw_revision_show(struct device *dev,
555 struct device_attribute *attr, char *buf)
556 {
557 struct omap_dss_device *dssdev = to_dss_device(dev);
558 struct taal_data *td = dev_get_drvdata(&dssdev->dev);
559 u8 id1, id2, id3;
560 int r;
561
562 mutex_lock(&td->lock);
563
564 if (td->enabled) {
565 dsi_bus_lock(dssdev);
566
567 r = taal_wake_up(dssdev);
568 if (!r)
569 r = taal_get_id(td, &id1, &id2, &id3);
570
571 dsi_bus_unlock(dssdev);
572 } else {
573 r = -ENODEV;
574 }
575
576 mutex_unlock(&td->lock);
577
578 if (r)
579 return r;
580
581 return snprintf(buf, PAGE_SIZE, "%02x.%02x.%02x\n", id1, id2, id3);
582 }
583
584 static const char *cabc_modes[] = {
585 "off", /* used also always when CABC is not supported */
586 "ui",
587 "still-image",
588 "moving-image",
589 };
590
591 static ssize_t show_cabc_mode(struct device *dev,
592 struct device_attribute *attr,
593 char *buf)
594 {
595 struct omap_dss_device *dssdev = to_dss_device(dev);
596 struct taal_data *td = dev_get_drvdata(&dssdev->dev);
597 const char *mode_str;
598 int mode;
599 int len;
600
601 mode = td->cabc_mode;
602
603 mode_str = "unknown";
604 if (mode >= 0 && mode < ARRAY_SIZE(cabc_modes))
605 mode_str = cabc_modes[mode];
606 len = snprintf(buf, PAGE_SIZE, "%s\n", mode_str);
607
608 return len < PAGE_SIZE - 1 ? len : PAGE_SIZE - 1;
609 }
610
611 static ssize_t store_cabc_mode(struct device *dev,
612 struct device_attribute *attr,
613 const char *buf, size_t count)
614 {
615 struct omap_dss_device *dssdev = to_dss_device(dev);
616 struct taal_data *td = dev_get_drvdata(&dssdev->dev);
617 int i;
618 int r;
619
620 for (i = 0; i < ARRAY_SIZE(cabc_modes); i++) {
621 if (sysfs_streq(cabc_modes[i], buf))
622 break;
623 }
624
625 if (i == ARRAY_SIZE(cabc_modes))
626 return -EINVAL;
627
628 mutex_lock(&td->lock);
629
630 if (td->enabled) {
631 dsi_bus_lock(dssdev);
632
633 if (!td->cabc_broken) {
634 r = taal_wake_up(dssdev);
635 if (r)
636 goto err;
637
638 r = taal_dcs_write_1(td, DCS_WRITE_CABC, i);
639 if (r)
640 goto err;
641 }
642
643 dsi_bus_unlock(dssdev);
644 }
645
646 td->cabc_mode = i;
647
648 mutex_unlock(&td->lock);
649
650 return count;
651 err:
652 dsi_bus_unlock(dssdev);
653 mutex_unlock(&td->lock);
654 return r;
655 }
656
657 static ssize_t show_cabc_available_modes(struct device *dev,
658 struct device_attribute *attr,
659 char *buf)
660 {
661 int len;
662 int i;
663
664 for (i = 0, len = 0;
665 len < PAGE_SIZE && i < ARRAY_SIZE(cabc_modes); i++)
666 len += snprintf(&buf[len], PAGE_SIZE - len, "%s%s%s",
667 i ? " " : "", cabc_modes[i],
668 i == ARRAY_SIZE(cabc_modes) - 1 ? "\n" : "");
669
670 return len < PAGE_SIZE ? len : PAGE_SIZE - 1;
671 }
672
673 static ssize_t taal_store_esd_interval(struct device *dev,
674 struct device_attribute *attr,
675 const char *buf, size_t count)
676 {
677 struct omap_dss_device *dssdev = to_dss_device(dev);
678 struct taal_data *td = dev_get_drvdata(&dssdev->dev);
679
680 unsigned long t;
681 int r;
682
683 r = strict_strtoul(buf, 10, &t);
684 if (r)
685 return r;
686
687 mutex_lock(&td->lock);
688 taal_cancel_esd_work(dssdev);
689 td->esd_interval = t;
690 if (td->enabled)
691 taal_queue_esd_work(dssdev);
692 mutex_unlock(&td->lock);
693
694 return count;
695 }
696
697 static ssize_t taal_show_esd_interval(struct device *dev,
698 struct device_attribute *attr,
699 char *buf)
700 {
701 struct omap_dss_device *dssdev = to_dss_device(dev);
702 struct taal_data *td = dev_get_drvdata(&dssdev->dev);
703 unsigned t;
704
705 mutex_lock(&td->lock);
706 t = td->esd_interval;
707 mutex_unlock(&td->lock);
708
709 return snprintf(buf, PAGE_SIZE, "%u\n", t);
710 }
711
712 static ssize_t taal_store_ulps(struct device *dev,
713 struct device_attribute *attr,
714 const char *buf, size_t count)
715 {
716 struct omap_dss_device *dssdev = to_dss_device(dev);
717 struct taal_data *td = dev_get_drvdata(&dssdev->dev);
718 unsigned long t;
719 int r;
720
721 r = strict_strtoul(buf, 10, &t);
722 if (r)
723 return r;
724
725 mutex_lock(&td->lock);
726
727 if (td->enabled) {
728 dsi_bus_lock(dssdev);
729
730 if (t)
731 r = taal_enter_ulps(dssdev);
732 else
733 r = taal_wake_up(dssdev);
734
735 dsi_bus_unlock(dssdev);
736 }
737
738 mutex_unlock(&td->lock);
739
740 if (r)
741 return r;
742
743 return count;
744 }
745
746 static ssize_t taal_show_ulps(struct device *dev,
747 struct device_attribute *attr,
748 char *buf)
749 {
750 struct omap_dss_device *dssdev = to_dss_device(dev);
751 struct taal_data *td = dev_get_drvdata(&dssdev->dev);
752 unsigned t;
753
754 mutex_lock(&td->lock);
755 t = td->ulps_enabled;
756 mutex_unlock(&td->lock);
757
758 return snprintf(buf, PAGE_SIZE, "%u\n", t);
759 }
760
761 static ssize_t taal_store_ulps_timeout(struct device *dev,
762 struct device_attribute *attr,
763 const char *buf, size_t count)
764 {
765 struct omap_dss_device *dssdev = to_dss_device(dev);
766 struct taal_data *td = dev_get_drvdata(&dssdev->dev);
767 unsigned long t;
768 int r;
769
770 r = strict_strtoul(buf, 10, &t);
771 if (r)
772 return r;
773
774 mutex_lock(&td->lock);
775 td->ulps_timeout = t;
776
777 if (td->enabled) {
778 /* taal_wake_up will restart the timer */
779 dsi_bus_lock(dssdev);
780 r = taal_wake_up(dssdev);
781 dsi_bus_unlock(dssdev);
782 }
783
784 mutex_unlock(&td->lock);
785
786 if (r)
787 return r;
788
789 return count;
790 }
791
792 static ssize_t taal_show_ulps_timeout(struct device *dev,
793 struct device_attribute *attr,
794 char *buf)
795 {
796 struct omap_dss_device *dssdev = to_dss_device(dev);
797 struct taal_data *td = dev_get_drvdata(&dssdev->dev);
798 unsigned t;
799
800 mutex_lock(&td->lock);
801 t = td->ulps_timeout;
802 mutex_unlock(&td->lock);
803
804 return snprintf(buf, PAGE_SIZE, "%u\n", t);
805 }
806
807 static DEVICE_ATTR(num_dsi_errors, S_IRUGO, taal_num_errors_show, NULL);
808 static DEVICE_ATTR(hw_revision, S_IRUGO, taal_hw_revision_show, NULL);
809 static DEVICE_ATTR(cabc_mode, S_IRUGO | S_IWUSR,
810 show_cabc_mode, store_cabc_mode);
811 static DEVICE_ATTR(cabc_available_modes, S_IRUGO,
812 show_cabc_available_modes, NULL);
813 static DEVICE_ATTR(esd_interval, S_IRUGO | S_IWUSR,
814 taal_show_esd_interval, taal_store_esd_interval);
815 static DEVICE_ATTR(ulps, S_IRUGO | S_IWUSR,
816 taal_show_ulps, taal_store_ulps);
817 static DEVICE_ATTR(ulps_timeout, S_IRUGO | S_IWUSR,
818 taal_show_ulps_timeout, taal_store_ulps_timeout);
819
820 static struct attribute *taal_attrs[] = {
821 &dev_attr_num_dsi_errors.attr,
822 &dev_attr_hw_revision.attr,
823 &dev_attr_cabc_mode.attr,
824 &dev_attr_cabc_available_modes.attr,
825 &dev_attr_esd_interval.attr,
826 &dev_attr_ulps.attr,
827 &dev_attr_ulps_timeout.attr,
828 NULL,
829 };
830
831 static struct attribute_group taal_attr_group = {
832 .attrs = taal_attrs,
833 };
834
835 static void taal_hw_reset(struct omap_dss_device *dssdev)
836 {
837 struct taal_data *td = dev_get_drvdata(&dssdev->dev);
838 struct nokia_dsi_panel_data *panel_data = get_panel_data(dssdev);
839
840 if (panel_data->reset_gpio == -1)
841 return;
842
843 gpio_set_value(panel_data->reset_gpio, 1);
844 if (td->panel_config->reset_sequence.high)
845 udelay(td->panel_config->reset_sequence.high);
846 /* reset the panel */
847 gpio_set_value(panel_data->reset_gpio, 0);
848 /* assert reset */
849 if (td->panel_config->reset_sequence.low)
850 udelay(td->panel_config->reset_sequence.low);
851 gpio_set_value(panel_data->reset_gpio, 1);
852 /* wait after releasing reset */
853 if (td->panel_config->sleep.hw_reset)
854 msleep(td->panel_config->sleep.hw_reset);
855 }
856
857 static int taal_probe(struct omap_dss_device *dssdev)
858 {
859 struct backlight_properties props;
860 struct taal_data *td;
861 struct backlight_device *bldev = NULL;
862 struct nokia_dsi_panel_data *panel_data = get_panel_data(dssdev);
863 struct panel_config *panel_config = NULL;
864 int r, i;
865
866 dev_dbg(&dssdev->dev, "probe\n");
867
868 if (!panel_data || !panel_data->name) {
869 r = -EINVAL;
870 goto err;
871 }
872
873 for (i = 0; i < ARRAY_SIZE(panel_configs); i++) {
874 if (strcmp(panel_data->name, panel_configs[i].name) == 0) {
875 panel_config = &panel_configs[i];
876 break;
877 }
878 }
879
880 if (!panel_config) {
881 r = -EINVAL;
882 goto err;
883 }
884
885 dssdev->panel.config = OMAP_DSS_LCD_TFT;
886 dssdev->panel.timings = panel_config->timings;
887 dssdev->panel.dsi_pix_fmt = OMAP_DSS_DSI_FMT_RGB888;
888
889 td = kzalloc(sizeof(*td), GFP_KERNEL);
890 if (!td) {
891 r = -ENOMEM;
892 goto err;
893 }
894 td->dssdev = dssdev;
895 td->panel_config = panel_config;
896 td->esd_interval = panel_data->esd_interval;
897 td->ulps_enabled = false;
898 td->ulps_timeout = panel_data->ulps_timeout;
899
900 mutex_init(&td->lock);
901
902 atomic_set(&td->do_update, 0);
903
904 td->workqueue = create_singlethread_workqueue("taal_esd");
905 if (td->workqueue == NULL) {
906 dev_err(&dssdev->dev, "can't create ESD workqueue\n");
907 r = -ENOMEM;
908 goto err_wq;
909 }
910 INIT_DELAYED_WORK_DEFERRABLE(&td->esd_work, taal_esd_work);
911 INIT_DELAYED_WORK(&td->ulps_work, taal_ulps_work);
912
913 dev_set_drvdata(&dssdev->dev, td);
914
915 if (gpio_is_valid(panel_data->reset_gpio)) {
916 r = gpio_request_one(panel_data->reset_gpio, GPIOF_OUT_INIT_LOW,
917 "taal rst");
918 if (r) {
919 dev_err(&dssdev->dev, "failed to request reset gpio\n");
920 goto err_rst_gpio;
921 }
922 }
923
924 taal_hw_reset(dssdev);
925
926 if (panel_data->use_dsi_backlight) {
927 memset(&props, 0, sizeof(struct backlight_properties));
928 props.max_brightness = 255;
929
930 props.type = BACKLIGHT_RAW;
931 bldev = backlight_device_register(dev_name(&dssdev->dev),
932 &dssdev->dev, dssdev, &taal_bl_ops, &props);
933 if (IS_ERR(bldev)) {
934 r = PTR_ERR(bldev);
935 goto err_bl;
936 }
937
938 td->bldev = bldev;
939
940 bldev->props.fb_blank = FB_BLANK_UNBLANK;
941 bldev->props.power = FB_BLANK_UNBLANK;
942 bldev->props.brightness = 255;
943
944 taal_bl_update_status(bldev);
945 }
946
947 if (panel_data->use_ext_te) {
948 int gpio = panel_data->ext_te_gpio;
949
950 r = gpio_request_one(gpio, GPIOF_IN, "taal irq");
951 if (r) {
952 dev_err(&dssdev->dev, "GPIO request failed\n");
953 goto err_gpio;
954 }
955
956 r = request_irq(gpio_to_irq(gpio), taal_te_isr,
957 IRQF_TRIGGER_RISING,
958 "taal vsync", dssdev);
959
960 if (r) {
961 dev_err(&dssdev->dev, "IRQ request failed\n");
962 gpio_free(gpio);
963 goto err_irq;
964 }
965
966 INIT_DELAYED_WORK_DEFERRABLE(&td->te_timeout_work,
967 taal_te_timeout_work_callback);
968
969 dev_dbg(&dssdev->dev, "Using GPIO TE\n");
970 }
971
972 r = omap_dsi_request_vc(dssdev, &td->channel);
973 if (r) {
974 dev_err(&dssdev->dev, "failed to get virtual channel\n");
975 goto err_req_vc;
976 }
977
978 r = omap_dsi_set_vc_id(dssdev, td->channel, TCH);
979 if (r) {
980 dev_err(&dssdev->dev, "failed to set VC_ID\n");
981 goto err_vc_id;
982 }
983
984 r = sysfs_create_group(&dssdev->dev.kobj, &taal_attr_group);
985 if (r) {
986 dev_err(&dssdev->dev, "failed to create sysfs files\n");
987 goto err_vc_id;
988 }
989
990 return 0;
991
992 err_vc_id:
993 omap_dsi_release_vc(dssdev, td->channel);
994 err_req_vc:
995 if (panel_data->use_ext_te)
996 free_irq(gpio_to_irq(panel_data->ext_te_gpio), dssdev);
997 err_irq:
998 if (panel_data->use_ext_te)
999 gpio_free(panel_data->ext_te_gpio);
1000 err_gpio:
1001 if (bldev != NULL)
1002 backlight_device_unregister(bldev);
1003 err_bl:
1004 if (gpio_is_valid(panel_data->reset_gpio))
1005 gpio_free(panel_data->reset_gpio);
1006 err_rst_gpio:
1007 destroy_workqueue(td->workqueue);
1008 err_wq:
1009 kfree(td);
1010 err:
1011 return r;
1012 }
1013
1014 static void __exit taal_remove(struct omap_dss_device *dssdev)
1015 {
1016 struct taal_data *td = dev_get_drvdata(&dssdev->dev);
1017 struct nokia_dsi_panel_data *panel_data = get_panel_data(dssdev);
1018 struct backlight_device *bldev;
1019
1020 dev_dbg(&dssdev->dev, "remove\n");
1021
1022 sysfs_remove_group(&dssdev->dev.kobj, &taal_attr_group);
1023 omap_dsi_release_vc(dssdev, td->channel);
1024
1025 if (panel_data->use_ext_te) {
1026 int gpio = panel_data->ext_te_gpio;
1027 free_irq(gpio_to_irq(gpio), dssdev);
1028 gpio_free(gpio);
1029 }
1030
1031 bldev = td->bldev;
1032 if (bldev != NULL) {
1033 bldev->props.power = FB_BLANK_POWERDOWN;
1034 taal_bl_update_status(bldev);
1035 backlight_device_unregister(bldev);
1036 }
1037
1038 taal_cancel_ulps_work(dssdev);
1039 taal_cancel_esd_work(dssdev);
1040 destroy_workqueue(td->workqueue);
1041
1042 /* reset, to be sure that the panel is in a valid state */
1043 taal_hw_reset(dssdev);
1044
1045 if (gpio_is_valid(panel_data->reset_gpio))
1046 gpio_free(panel_data->reset_gpio);
1047
1048 kfree(td);
1049 }
1050
1051 static int taal_power_on(struct omap_dss_device *dssdev)
1052 {
1053 struct taal_data *td = dev_get_drvdata(&dssdev->dev);
1054 struct nokia_dsi_panel_data *panel_data = get_panel_data(dssdev);
1055 u8 id1, id2, id3;
1056 int r;
1057
1058 r = omapdss_dsi_configure_pins(dssdev, &panel_data->pin_config);
1059 if (r) {
1060 dev_err(&dssdev->dev, "failed to configure DSI pins\n");
1061 goto err0;
1062 };
1063
1064 r = omapdss_dsi_display_enable(dssdev);
1065 if (r) {
1066 dev_err(&dssdev->dev, "failed to enable DSI\n");
1067 goto err0;
1068 }
1069
1070 taal_hw_reset(dssdev);
1071
1072 omapdss_dsi_vc_enable_hs(dssdev, td->channel, false);
1073
1074 r = taal_sleep_out(td);
1075 if (r)
1076 goto err;
1077
1078 r = taal_get_id(td, &id1, &id2, &id3);
1079 if (r)
1080 goto err;
1081
1082 /* on early Taal revisions CABC is broken */
1083 if (td->panel_config->type == PANEL_TAAL &&
1084 (id2 == 0x00 || id2 == 0xff || id2 == 0x81))
1085 td->cabc_broken = true;
1086
1087 r = taal_dcs_write_1(td, DCS_BRIGHTNESS, 0xff);
1088 if (r)
1089 goto err;
1090
1091 r = taal_dcs_write_1(td, DCS_CTRL_DISPLAY,
1092 (1<<2) | (1<<5)); /* BL | BCTRL */
1093 if (r)
1094 goto err;
1095
1096 r = taal_dcs_write_1(td, MIPI_DCS_SET_PIXEL_FORMAT,
1097 MIPI_DCS_PIXEL_FMT_24BIT);
1098 if (r)
1099 goto err;
1100
1101 r = taal_set_addr_mode(td, td->rotate, td->mirror);
1102 if (r)
1103 goto err;
1104
1105 if (!td->cabc_broken) {
1106 r = taal_dcs_write_1(td, DCS_WRITE_CABC, td->cabc_mode);
1107 if (r)
1108 goto err;
1109 }
1110
1111 r = taal_dcs_write_0(td, MIPI_DCS_SET_DISPLAY_ON);
1112 if (r)
1113 goto err;
1114
1115 r = _taal_enable_te(dssdev, td->te_enabled);
1116 if (r)
1117 goto err;
1118
1119 r = dsi_enable_video_output(dssdev, td->channel);
1120 if (r)
1121 goto err;
1122
1123 td->enabled = 1;
1124
1125 if (!td->intro_printed) {
1126 dev_info(&dssdev->dev, "%s panel revision %02x.%02x.%02x\n",
1127 td->panel_config->name, id1, id2, id3);
1128 if (td->cabc_broken)
1129 dev_info(&dssdev->dev,
1130 "old Taal version, CABC disabled\n");
1131 td->intro_printed = true;
1132 }
1133
1134 omapdss_dsi_vc_enable_hs(dssdev, td->channel, true);
1135
1136 return 0;
1137 err:
1138 dev_err(&dssdev->dev, "error while enabling panel, issuing HW reset\n");
1139
1140 taal_hw_reset(dssdev);
1141
1142 omapdss_dsi_display_disable(dssdev, true, false);
1143 err0:
1144 return r;
1145 }
1146
1147 static void taal_power_off(struct omap_dss_device *dssdev)
1148 {
1149 struct taal_data *td = dev_get_drvdata(&dssdev->dev);
1150 int r;
1151
1152 dsi_disable_video_output(dssdev, td->channel);
1153
1154 r = taal_dcs_write_0(td, MIPI_DCS_SET_DISPLAY_OFF);
1155 if (!r)
1156 r = taal_sleep_in(td);
1157
1158 if (r) {
1159 dev_err(&dssdev->dev,
1160 "error disabling panel, issuing HW reset\n");
1161 taal_hw_reset(dssdev);
1162 }
1163
1164 omapdss_dsi_display_disable(dssdev, true, false);
1165
1166 td->enabled = 0;
1167 }
1168
1169 static int taal_panel_reset(struct omap_dss_device *dssdev)
1170 {
1171 dev_err(&dssdev->dev, "performing LCD reset\n");
1172
1173 taal_power_off(dssdev);
1174 taal_hw_reset(dssdev);
1175 return taal_power_on(dssdev);
1176 }
1177
1178 static int taal_enable(struct omap_dss_device *dssdev)
1179 {
1180 struct taal_data *td = dev_get_drvdata(&dssdev->dev);
1181 int r;
1182
1183 dev_dbg(&dssdev->dev, "enable\n");
1184
1185 mutex_lock(&td->lock);
1186
1187 if (dssdev->state != OMAP_DSS_DISPLAY_DISABLED) {
1188 r = -EINVAL;
1189 goto err;
1190 }
1191
1192 dsi_bus_lock(dssdev);
1193
1194 r = taal_power_on(dssdev);
1195
1196 dsi_bus_unlock(dssdev);
1197
1198 if (r)
1199 goto err;
1200
1201 taal_queue_esd_work(dssdev);
1202
1203 dssdev->state = OMAP_DSS_DISPLAY_ACTIVE;
1204
1205 mutex_unlock(&td->lock);
1206
1207 return 0;
1208 err:
1209 dev_dbg(&dssdev->dev, "enable failed\n");
1210 mutex_unlock(&td->lock);
1211 return r;
1212 }
1213
1214 static void taal_disable(struct omap_dss_device *dssdev)
1215 {
1216 struct taal_data *td = dev_get_drvdata(&dssdev->dev);
1217
1218 dev_dbg(&dssdev->dev, "disable\n");
1219
1220 mutex_lock(&td->lock);
1221
1222 taal_cancel_ulps_work(dssdev);
1223 taal_cancel_esd_work(dssdev);
1224
1225 dsi_bus_lock(dssdev);
1226
1227 if (dssdev->state == OMAP_DSS_DISPLAY_ACTIVE) {
1228 int r;
1229
1230 r = taal_wake_up(dssdev);
1231 if (!r)
1232 taal_power_off(dssdev);
1233 }
1234
1235 dsi_bus_unlock(dssdev);
1236
1237 dssdev->state = OMAP_DSS_DISPLAY_DISABLED;
1238
1239 mutex_unlock(&td->lock);
1240 }
1241
1242 static int taal_suspend(struct omap_dss_device *dssdev)
1243 {
1244 struct taal_data *td = dev_get_drvdata(&dssdev->dev);
1245 int r;
1246
1247 dev_dbg(&dssdev->dev, "suspend\n");
1248
1249 mutex_lock(&td->lock);
1250
1251 if (dssdev->state != OMAP_DSS_DISPLAY_ACTIVE) {
1252 r = -EINVAL;
1253 goto err;
1254 }
1255
1256 taal_cancel_ulps_work(dssdev);
1257 taal_cancel_esd_work(dssdev);
1258
1259 dsi_bus_lock(dssdev);
1260
1261 r = taal_wake_up(dssdev);
1262 if (!r)
1263 taal_power_off(dssdev);
1264
1265 dsi_bus_unlock(dssdev);
1266
1267 dssdev->state = OMAP_DSS_DISPLAY_SUSPENDED;
1268
1269 mutex_unlock(&td->lock);
1270
1271 return 0;
1272 err:
1273 mutex_unlock(&td->lock);
1274 return r;
1275 }
1276
1277 static int taal_resume(struct omap_dss_device *dssdev)
1278 {
1279 struct taal_data *td = dev_get_drvdata(&dssdev->dev);
1280 int r;
1281
1282 dev_dbg(&dssdev->dev, "resume\n");
1283
1284 mutex_lock(&td->lock);
1285
1286 if (dssdev->state != OMAP_DSS_DISPLAY_SUSPENDED) {
1287 r = -EINVAL;
1288 goto err;
1289 }
1290
1291 dsi_bus_lock(dssdev);
1292
1293 r = taal_power_on(dssdev);
1294
1295 dsi_bus_unlock(dssdev);
1296
1297 if (r) {
1298 dssdev->state = OMAP_DSS_DISPLAY_DISABLED;
1299 } else {
1300 dssdev->state = OMAP_DSS_DISPLAY_ACTIVE;
1301 taal_queue_esd_work(dssdev);
1302 }
1303
1304 mutex_unlock(&td->lock);
1305
1306 return r;
1307 err:
1308 mutex_unlock(&td->lock);
1309 return r;
1310 }
1311
1312 static void taal_framedone_cb(int err, void *data)
1313 {
1314 struct omap_dss_device *dssdev = data;
1315 dev_dbg(&dssdev->dev, "framedone, err %d\n", err);
1316 dsi_bus_unlock(dssdev);
1317 }
1318
1319 static irqreturn_t taal_te_isr(int irq, void *data)
1320 {
1321 struct omap_dss_device *dssdev = data;
1322 struct taal_data *td = dev_get_drvdata(&dssdev->dev);
1323 int old;
1324 int r;
1325
1326 old = atomic_cmpxchg(&td->do_update, 1, 0);
1327
1328 if (old) {
1329 cancel_delayed_work(&td->te_timeout_work);
1330
1331 r = omap_dsi_update(dssdev, td->channel, taal_framedone_cb,
1332 dssdev);
1333 if (r)
1334 goto err;
1335 }
1336
1337 return IRQ_HANDLED;
1338 err:
1339 dev_err(&dssdev->dev, "start update failed\n");
1340 dsi_bus_unlock(dssdev);
1341 return IRQ_HANDLED;
1342 }
1343
1344 static void taal_te_timeout_work_callback(struct work_struct *work)
1345 {
1346 struct taal_data *td = container_of(work, struct taal_data,
1347 te_timeout_work.work);
1348 struct omap_dss_device *dssdev = td->dssdev;
1349
1350 dev_err(&dssdev->dev, "TE not received for 250ms!\n");
1351
1352 atomic_set(&td->do_update, 0);
1353 dsi_bus_unlock(dssdev);
1354 }
1355
1356 static int taal_update(struct omap_dss_device *dssdev,
1357 u16 x, u16 y, u16 w, u16 h)
1358 {
1359 struct taal_data *td = dev_get_drvdata(&dssdev->dev);
1360 struct nokia_dsi_panel_data *panel_data = get_panel_data(dssdev);
1361 int r;
1362
1363 dev_dbg(&dssdev->dev, "update %d, %d, %d x %d\n", x, y, w, h);
1364
1365 mutex_lock(&td->lock);
1366 dsi_bus_lock(dssdev);
1367
1368 r = taal_wake_up(dssdev);
1369 if (r)
1370 goto err;
1371
1372 if (!td->enabled) {
1373 r = 0;
1374 goto err;
1375 }
1376
1377 /* XXX no need to send this every frame, but dsi break if not done */
1378 r = taal_set_update_window(td, 0, 0,
1379 td->panel_config->timings.x_res,
1380 td->panel_config->timings.y_res);
1381 if (r)
1382 goto err;
1383
1384 if (td->te_enabled && panel_data->use_ext_te) {
1385 schedule_delayed_work(&td->te_timeout_work,
1386 msecs_to_jiffies(250));
1387 atomic_set(&td->do_update, 1);
1388 } else {
1389 r = omap_dsi_update(dssdev, td->channel, taal_framedone_cb,
1390 dssdev);
1391 if (r)
1392 goto err;
1393 }
1394
1395 /* note: no bus_unlock here. unlock is in framedone_cb */
1396 mutex_unlock(&td->lock);
1397 return 0;
1398 err:
1399 dsi_bus_unlock(dssdev);
1400 mutex_unlock(&td->lock);
1401 return r;
1402 }
1403
1404 static int taal_sync(struct omap_dss_device *dssdev)
1405 {
1406 struct taal_data *td = dev_get_drvdata(&dssdev->dev);
1407
1408 dev_dbg(&dssdev->dev, "sync\n");
1409
1410 mutex_lock(&td->lock);
1411 dsi_bus_lock(dssdev);
1412 dsi_bus_unlock(dssdev);
1413 mutex_unlock(&td->lock);
1414
1415 dev_dbg(&dssdev->dev, "sync done\n");
1416
1417 return 0;
1418 }
1419
1420 static int _taal_enable_te(struct omap_dss_device *dssdev, bool enable)
1421 {
1422 struct taal_data *td = dev_get_drvdata(&dssdev->dev);
1423 struct nokia_dsi_panel_data *panel_data = get_panel_data(dssdev);
1424 int r;
1425
1426 if (enable)
1427 r = taal_dcs_write_1(td, MIPI_DCS_SET_TEAR_ON, 0);
1428 else
1429 r = taal_dcs_write_0(td, MIPI_DCS_SET_TEAR_OFF);
1430
1431 if (!panel_data->use_ext_te)
1432 omapdss_dsi_enable_te(dssdev, enable);
1433
1434 if (td->panel_config->sleep.enable_te)
1435 msleep(td->panel_config->sleep.enable_te);
1436
1437 return r;
1438 }
1439
1440 static int taal_enable_te(struct omap_dss_device *dssdev, bool enable)
1441 {
1442 struct taal_data *td = dev_get_drvdata(&dssdev->dev);
1443 int r;
1444
1445 mutex_lock(&td->lock);
1446
1447 if (td->te_enabled == enable)
1448 goto end;
1449
1450 dsi_bus_lock(dssdev);
1451
1452 if (td->enabled) {
1453 r = taal_wake_up(dssdev);
1454 if (r)
1455 goto err;
1456
1457 r = _taal_enable_te(dssdev, enable);
1458 if (r)
1459 goto err;
1460 }
1461
1462 td->te_enabled = enable;
1463
1464 dsi_bus_unlock(dssdev);
1465 end:
1466 mutex_unlock(&td->lock);
1467
1468 return 0;
1469 err:
1470 dsi_bus_unlock(dssdev);
1471 mutex_unlock(&td->lock);
1472
1473 return r;
1474 }
1475
1476 static int taal_get_te(struct omap_dss_device *dssdev)
1477 {
1478 struct taal_data *td = dev_get_drvdata(&dssdev->dev);
1479 int r;
1480
1481 mutex_lock(&td->lock);
1482 r = td->te_enabled;
1483 mutex_unlock(&td->lock);
1484
1485 return r;
1486 }
1487
1488 static int taal_rotate(struct omap_dss_device *dssdev, u8 rotate)
1489 {
1490 struct taal_data *td = dev_get_drvdata(&dssdev->dev);
1491 int r;
1492
1493 dev_dbg(&dssdev->dev, "rotate %d\n", rotate);
1494
1495 mutex_lock(&td->lock);
1496
1497 if (td->rotate == rotate)
1498 goto end;
1499
1500 dsi_bus_lock(dssdev);
1501
1502 if (td->enabled) {
1503 r = taal_wake_up(dssdev);
1504 if (r)
1505 goto err;
1506
1507 r = taal_set_addr_mode(td, rotate, td->mirror);
1508 if (r)
1509 goto err;
1510 }
1511
1512 td->rotate = rotate;
1513
1514 dsi_bus_unlock(dssdev);
1515 end:
1516 mutex_unlock(&td->lock);
1517 return 0;
1518 err:
1519 dsi_bus_unlock(dssdev);
1520 mutex_unlock(&td->lock);
1521 return r;
1522 }
1523
1524 static u8 taal_get_rotate(struct omap_dss_device *dssdev)
1525 {
1526 struct taal_data *td = dev_get_drvdata(&dssdev->dev);
1527 int r;
1528
1529 mutex_lock(&td->lock);
1530 r = td->rotate;
1531 mutex_unlock(&td->lock);
1532
1533 return r;
1534 }
1535
1536 static int taal_mirror(struct omap_dss_device *dssdev, bool enable)
1537 {
1538 struct taal_data *td = dev_get_drvdata(&dssdev->dev);
1539 int r;
1540
1541 dev_dbg(&dssdev->dev, "mirror %d\n", enable);
1542
1543 mutex_lock(&td->lock);
1544
1545 if (td->mirror == enable)
1546 goto end;
1547
1548 dsi_bus_lock(dssdev);
1549 if (td->enabled) {
1550 r = taal_wake_up(dssdev);
1551 if (r)
1552 goto err;
1553
1554 r = taal_set_addr_mode(td, td->rotate, enable);
1555 if (r)
1556 goto err;
1557 }
1558
1559 td->mirror = enable;
1560
1561 dsi_bus_unlock(dssdev);
1562 end:
1563 mutex_unlock(&td->lock);
1564 return 0;
1565 err:
1566 dsi_bus_unlock(dssdev);
1567 mutex_unlock(&td->lock);
1568 return r;
1569 }
1570
1571 static bool taal_get_mirror(struct omap_dss_device *dssdev)
1572 {
1573 struct taal_data *td = dev_get_drvdata(&dssdev->dev);
1574 int r;
1575
1576 mutex_lock(&td->lock);
1577 r = td->mirror;
1578 mutex_unlock(&td->lock);
1579
1580 return r;
1581 }
1582
1583 static int taal_run_test(struct omap_dss_device *dssdev, int test_num)
1584 {
1585 struct taal_data *td = dev_get_drvdata(&dssdev->dev);
1586 u8 id1, id2, id3;
1587 int r;
1588
1589 mutex_lock(&td->lock);
1590
1591 if (!td->enabled) {
1592 r = -ENODEV;
1593 goto err1;
1594 }
1595
1596 dsi_bus_lock(dssdev);
1597
1598 r = taal_wake_up(dssdev);
1599 if (r)
1600 goto err2;
1601
1602 r = taal_dcs_read_1(td, DCS_GET_ID1, &id1);
1603 if (r)
1604 goto err2;
1605 r = taal_dcs_read_1(td, DCS_GET_ID2, &id2);
1606 if (r)
1607 goto err2;
1608 r = taal_dcs_read_1(td, DCS_GET_ID3, &id3);
1609 if (r)
1610 goto err2;
1611
1612 dsi_bus_unlock(dssdev);
1613 mutex_unlock(&td->lock);
1614 return 0;
1615 err2:
1616 dsi_bus_unlock(dssdev);
1617 err1:
1618 mutex_unlock(&td->lock);
1619 return r;
1620 }
1621
1622 static int taal_memory_read(struct omap_dss_device *dssdev,
1623 void *buf, size_t size,
1624 u16 x, u16 y, u16 w, u16 h)
1625 {
1626 int r;
1627 int first = 1;
1628 int plen;
1629 unsigned buf_used = 0;
1630 struct taal_data *td = dev_get_drvdata(&dssdev->dev);
1631
1632 if (size < w * h * 3)
1633 return -ENOMEM;
1634
1635 mutex_lock(&td->lock);
1636
1637 if (!td->enabled) {
1638 r = -ENODEV;
1639 goto err1;
1640 }
1641
1642 size = min(w * h * 3,
1643 dssdev->panel.timings.x_res *
1644 dssdev->panel.timings.y_res * 3);
1645
1646 dsi_bus_lock(dssdev);
1647
1648 r = taal_wake_up(dssdev);
1649 if (r)
1650 goto err2;
1651
1652 /* plen 1 or 2 goes into short packet. until checksum error is fixed,
1653 * use short packets. plen 32 works, but bigger packets seem to cause
1654 * an error. */
1655 if (size % 2)
1656 plen = 1;
1657 else
1658 plen = 2;
1659
1660 taal_set_update_window(td, x, y, w, h);
1661
1662 r = dsi_vc_set_max_rx_packet_size(dssdev, td->channel, plen);
1663 if (r)
1664 goto err2;
1665
1666 while (buf_used < size) {
1667 u8 dcs_cmd = first ? 0x2e : 0x3e;
1668 first = 0;
1669
1670 r = dsi_vc_dcs_read(dssdev, td->channel, dcs_cmd,
1671 buf + buf_used, size - buf_used);
1672
1673 if (r < 0) {
1674 dev_err(&dssdev->dev, "read error\n");
1675 goto err3;
1676 }
1677
1678 buf_used += r;
1679
1680 if (r < plen) {
1681 dev_err(&dssdev->dev, "short read\n");
1682 break;
1683 }
1684
1685 if (signal_pending(current)) {
1686 dev_err(&dssdev->dev, "signal pending, "
1687 "aborting memory read\n");
1688 r = -ERESTARTSYS;
1689 goto err3;
1690 }
1691 }
1692
1693 r = buf_used;
1694
1695 err3:
1696 dsi_vc_set_max_rx_packet_size(dssdev, td->channel, 1);
1697 err2:
1698 dsi_bus_unlock(dssdev);
1699 err1:
1700 mutex_unlock(&td->lock);
1701 return r;
1702 }
1703
1704 static void taal_ulps_work(struct work_struct *work)
1705 {
1706 struct taal_data *td = container_of(work, struct taal_data,
1707 ulps_work.work);
1708 struct omap_dss_device *dssdev = td->dssdev;
1709
1710 mutex_lock(&td->lock);
1711
1712 if (dssdev->state != OMAP_DSS_DISPLAY_ACTIVE || !td->enabled) {
1713 mutex_unlock(&td->lock);
1714 return;
1715 }
1716
1717 dsi_bus_lock(dssdev);
1718
1719 taal_enter_ulps(dssdev);
1720
1721 dsi_bus_unlock(dssdev);
1722 mutex_unlock(&td->lock);
1723 }
1724
1725 static void taal_esd_work(struct work_struct *work)
1726 {
1727 struct taal_data *td = container_of(work, struct taal_data,
1728 esd_work.work);
1729 struct omap_dss_device *dssdev = td->dssdev;
1730 struct nokia_dsi_panel_data *panel_data = get_panel_data(dssdev);
1731 u8 state1, state2;
1732 int r;
1733
1734 mutex_lock(&td->lock);
1735
1736 if (!td->enabled) {
1737 mutex_unlock(&td->lock);
1738 return;
1739 }
1740
1741 dsi_bus_lock(dssdev);
1742
1743 r = taal_wake_up(dssdev);
1744 if (r) {
1745 dev_err(&dssdev->dev, "failed to exit ULPS\n");
1746 goto err;
1747 }
1748
1749 r = taal_dcs_read_1(td, MIPI_DCS_GET_DIAGNOSTIC_RESULT, &state1);
1750 if (r) {
1751 dev_err(&dssdev->dev, "failed to read Taal status\n");
1752 goto err;
1753 }
1754
1755 /* Run self diagnostics */
1756 r = taal_sleep_out(td);
1757 if (r) {
1758 dev_err(&dssdev->dev, "failed to run Taal self-diagnostics\n");
1759 goto err;
1760 }
1761
1762 r = taal_dcs_read_1(td, MIPI_DCS_GET_DIAGNOSTIC_RESULT, &state2);
1763 if (r) {
1764 dev_err(&dssdev->dev, "failed to read Taal status\n");
1765 goto err;
1766 }
1767
1768 /* Each sleep out command will trigger a self diagnostic and flip
1769 * Bit6 if the test passes.
1770 */
1771 if (!((state1 ^ state2) & (1 << 6))) {
1772 dev_err(&dssdev->dev, "LCD self diagnostics failed\n");
1773 goto err;
1774 }
1775 /* Self-diagnostics result is also shown on TE GPIO line. We need
1776 * to re-enable TE after self diagnostics */
1777 if (td->te_enabled && panel_data->use_ext_te) {
1778 r = taal_dcs_write_1(td, MIPI_DCS_SET_TEAR_ON, 0);
1779 if (r)
1780 goto err;
1781 }
1782
1783 dsi_bus_unlock(dssdev);
1784
1785 taal_queue_esd_work(dssdev);
1786
1787 mutex_unlock(&td->lock);
1788 return;
1789 err:
1790 dev_err(&dssdev->dev, "performing LCD reset\n");
1791
1792 taal_panel_reset(dssdev);
1793
1794 dsi_bus_unlock(dssdev);
1795
1796 taal_queue_esd_work(dssdev);
1797
1798 mutex_unlock(&td->lock);
1799 }
1800
1801 static struct omap_dss_driver taal_driver = {
1802 .probe = taal_probe,
1803 .remove = __exit_p(taal_remove),
1804
1805 .enable = taal_enable,
1806 .disable = taal_disable,
1807 .suspend = taal_suspend,
1808 .resume = taal_resume,
1809
1810 .update = taal_update,
1811 .sync = taal_sync,
1812
1813 .get_resolution = taal_get_resolution,
1814 .get_recommended_bpp = omapdss_default_get_recommended_bpp,
1815
1816 .enable_te = taal_enable_te,
1817 .get_te = taal_get_te,
1818
1819 .set_rotate = taal_rotate,
1820 .get_rotate = taal_get_rotate,
1821 .set_mirror = taal_mirror,
1822 .get_mirror = taal_get_mirror,
1823 .run_test = taal_run_test,
1824 .memory_read = taal_memory_read,
1825
1826 .driver = {
1827 .name = "taal",
1828 .owner = THIS_MODULE,
1829 },
1830 };
1831
1832 static int __init taal_init(void)
1833 {
1834 omap_dss_register_driver(&taal_driver);
1835
1836 return 0;
1837 }
1838
1839 static void __exit taal_exit(void)
1840 {
1841 omap_dss_unregister_driver(&taal_driver);
1842 }
1843
1844 module_init(taal_init);
1845 module_exit(taal_exit);
1846
1847 MODULE_AUTHOR("Tomi Valkeinen <tomi.valkeinen@nokia.com>");
1848 MODULE_DESCRIPTION("Taal Driver");
1849 MODULE_LICENSE("GPL");
Linux kernel - Deliverables
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