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Merge 3.2-rc3 into usb-linus
[zen-stable.git] / drivers / video / omap2 / displays / panel-taal.c
blob80c3f6ab1a94d73df39d18233c8ddc4dbd91304a
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/regulator/consumer.h>
34 #include <linux/mutex.h>
35
36 #include <video/omapdss.h>
37 #include <video/omap-panel-nokia-dsi.h>
38 #include <video/mipi_display.h>
39
40 /* DSI Virtual channel. Hardcoded for now. */
41 #define TCH 0
42
43 #define DCS_READ_NUM_ERRORS 0x05
44 #define DCS_BRIGHTNESS 0x51
45 #define DCS_CTRL_DISPLAY 0x53
46 #define DCS_WRITE_CABC 0x55
47 #define DCS_READ_CABC 0x56
48 #define DCS_GET_ID1 0xda
49 #define DCS_GET_ID2 0xdb
50 #define DCS_GET_ID3 0xdc
51
52 static irqreturn_t taal_te_isr(int irq, void *data);
53 static void taal_te_timeout_work_callback(struct work_struct *work);
54 static int _taal_enable_te(struct omap_dss_device *dssdev, bool enable);
55
56 static int taal_panel_reset(struct omap_dss_device *dssdev);
57
58 struct panel_regulator {
59 struct regulator *regulator;
60 const char *name;
61 int min_uV;
62 int max_uV;
63 };
64
65 static void free_regulators(struct panel_regulator *regulators, int n)
66 {
67 int i;
68
69 for (i = 0; i < n; i++) {
70 /* disable/put in reverse order */
71 regulator_disable(regulators[n - i - 1].regulator);
72 regulator_put(regulators[n - i - 1].regulator);
73 }
74 }
75
76 static int init_regulators(struct omap_dss_device *dssdev,
77 struct panel_regulator *regulators, int n)
78 {
79 int r, i, v;
80
81 for (i = 0; i < n; i++) {
82 struct regulator *reg;
83
84 reg = regulator_get(&dssdev->dev, regulators[i].name);
85 if (IS_ERR(reg)) {
86 dev_err(&dssdev->dev, "failed to get regulator %s\n",
87 regulators[i].name);
88 r = PTR_ERR(reg);
89 goto err;
90 }
91
92 /* FIXME: better handling of fixed vs. variable regulators */
93 v = regulator_get_voltage(reg);
94 if (v < regulators[i].min_uV || v > regulators[i].max_uV) {
95 r = regulator_set_voltage(reg, regulators[i].min_uV,
96 regulators[i].max_uV);
97 if (r) {
98 dev_err(&dssdev->dev,
99 "failed to set regulator %s voltage\n",
100 regulators[i].name);
101 regulator_put(reg);
102 goto err;
103 }
104 }
105
106 r = regulator_enable(reg);
107 if (r) {
108 dev_err(&dssdev->dev, "failed to enable regulator %s\n",
109 regulators[i].name);
110 regulator_put(reg);
111 goto err;
112 }
113
114 regulators[i].regulator = reg;
115 }
116
117 return 0;
118
119 err:
120 free_regulators(regulators, i);
121
122 return r;
123 }
124
125 /**
126 * struct panel_config - panel configuration
127 * @name: panel name
128 * @type: panel type
129 * @timings: panel resolution
130 * @sleep: various panel specific delays, passed to msleep() if non-zero
131 * @reset_sequence: reset sequence timings, passed to udelay() if non-zero
132 * @regulators: array of panel regulators
133 * @num_regulators: number of regulators in the array
134 */
135 struct panel_config {
136 const char *name;
137 int type;
138
139 struct omap_video_timings timings;
140
141 struct {
142 unsigned int sleep_in;
143 unsigned int sleep_out;
144 unsigned int hw_reset;
145 unsigned int enable_te;
146 } sleep;
147
148 struct {
149 unsigned int high;
150 unsigned int low;
151 } reset_sequence;
152
153 struct panel_regulator *regulators;
154 int num_regulators;
155 };
156
157 enum {
158 PANEL_TAAL,
159 };
160
161 static struct panel_config panel_configs[] = {
162 {
163 .name = "taal",
164 .type = PANEL_TAAL,
165 .timings = {
166 .x_res = 864,
167 .y_res = 480,
168 },
169 .sleep = {
170 .sleep_in = 5,
171 .sleep_out = 5,
172 .hw_reset = 5,
173 .enable_te = 100, /* possible panel bug */
174 },
175 .reset_sequence = {
176 .high = 10,
177 .low = 10,
178 },
179 },
180 };
181
182 struct taal_data {
183 struct mutex lock;
184
185 struct backlight_device *bldev;
186
187 unsigned long hw_guard_end; /* next value of jiffies when we can
188 * issue the next sleep in/out command
189 */
190 unsigned long hw_guard_wait; /* max guard time in jiffies */
191
192 struct omap_dss_device *dssdev;
193
194 bool enabled;
195 u8 rotate;
196 bool mirror;
197
198 bool te_enabled;
199
200 atomic_t do_update;
201 struct {
202 u16 x;
203 u16 y;
204 u16 w;
205 u16 h;
206 } update_region;
207 int channel;
208
209 struct delayed_work te_timeout_work;
210
211 bool cabc_broken;
212 unsigned cabc_mode;
213
214 bool intro_printed;
215
216 struct workqueue_struct *workqueue;
217
218 struct delayed_work esd_work;
219 unsigned esd_interval;
220
221 bool ulps_enabled;
222 unsigned ulps_timeout;
223 struct delayed_work ulps_work;
224
225 struct panel_config *panel_config;
226 };
227
228 static inline struct nokia_dsi_panel_data
229 *get_panel_data(const struct omap_dss_device *dssdev)
230 {
231 return (struct nokia_dsi_panel_data *) dssdev->data;
232 }
233
234 static void taal_esd_work(struct work_struct *work);
235 static void taal_ulps_work(struct work_struct *work);
236
237 static void hw_guard_start(struct taal_data *td, int guard_msec)
238 {
239 td->hw_guard_wait = msecs_to_jiffies(guard_msec);
240 td->hw_guard_end = jiffies + td->hw_guard_wait;
241 }
242
243 static void hw_guard_wait(struct taal_data *td)
244 {
245 unsigned long wait = td->hw_guard_end - jiffies;
246
247 if ((long)wait > 0 && wait <= td->hw_guard_wait) {
248 set_current_state(TASK_UNINTERRUPTIBLE);
249 schedule_timeout(wait);
250 }
251 }
252
253 static int taal_dcs_read_1(struct taal_data *td, u8 dcs_cmd, u8 *data)
254 {
255 int r;
256 u8 buf[1];
257
258 r = dsi_vc_dcs_read(td->dssdev, td->channel, dcs_cmd, buf, 1);
259
260 if (r < 0)
261 return r;
262
263 *data = buf[0];
264
265 return 0;
266 }
267
268 static int taal_dcs_write_0(struct taal_data *td, u8 dcs_cmd)
269 {
270 return dsi_vc_dcs_write(td->dssdev, td->channel, &dcs_cmd, 1);
271 }
272
273 static int taal_dcs_write_1(struct taal_data *td, u8 dcs_cmd, u8 param)
274 {
275 u8 buf[2];
276 buf[0] = dcs_cmd;
277 buf[1] = param;
278 return dsi_vc_dcs_write(td->dssdev, td->channel, buf, 2);
279 }
280
281 static int taal_sleep_in(struct taal_data *td)
282
283 {
284 u8 cmd;
285 int r;
286
287 hw_guard_wait(td);
288
289 cmd = MIPI_DCS_ENTER_SLEEP_MODE;
290 r = dsi_vc_dcs_write_nosync(td->dssdev, td->channel, &cmd, 1);
291 if (r)
292 return r;
293
294 hw_guard_start(td, 120);
295
296 if (td->panel_config->sleep.sleep_in)
297 msleep(td->panel_config->sleep.sleep_in);
298
299 return 0;
300 }
301
302 static int taal_sleep_out(struct taal_data *td)
303 {
304 int r;
305
306 hw_guard_wait(td);
307
308 r = taal_dcs_write_0(td, MIPI_DCS_EXIT_SLEEP_MODE);
309 if (r)
310 return r;
311
312 hw_guard_start(td, 120);
313
314 if (td->panel_config->sleep.sleep_out)
315 msleep(td->panel_config->sleep.sleep_out);
316
317 return 0;
318 }
319
320 static int taal_get_id(struct taal_data *td, u8 *id1, u8 *id2, u8 *id3)
321 {
322 int r;
323
324 r = taal_dcs_read_1(td, DCS_GET_ID1, id1);
325 if (r)
326 return r;
327 r = taal_dcs_read_1(td, DCS_GET_ID2, id2);
328 if (r)
329 return r;
330 r = taal_dcs_read_1(td, DCS_GET_ID3, id3);
331 if (r)
332 return r;
333
334 return 0;
335 }
336
337 static int taal_set_addr_mode(struct taal_data *td, u8 rotate, bool mirror)
338 {
339 int r;
340 u8 mode;
341 int b5, b6, b7;
342
343 r = taal_dcs_read_1(td, MIPI_DCS_GET_ADDRESS_MODE, &mode);
344 if (r)
345 return r;
346
347 switch (rotate) {
348 default:
349 case 0:
350 b7 = 0;
351 b6 = 0;
352 b5 = 0;
353 break;
354 case 1:
355 b7 = 0;
356 b6 = 1;
357 b5 = 1;
358 break;
359 case 2:
360 b7 = 1;
361 b6 = 1;
362 b5 = 0;
363 break;
364 case 3:
365 b7 = 1;
366 b6 = 0;
367 b5 = 1;
368 break;
369 }
370
371 if (mirror)
372 b6 = !b6;
373
374 mode &= ~((1<<7) | (1<<6) | (1<<5));
375 mode |= (b7 << 7) | (b6 << 6) | (b5 << 5);
376
377 return taal_dcs_write_1(td, MIPI_DCS_SET_ADDRESS_MODE, mode);
378 }
379
380 static int taal_set_update_window(struct taal_data *td,
381 u16 x, u16 y, u16 w, u16 h)
382 {
383 int r;
384 u16 x1 = x;
385 u16 x2 = x + w - 1;
386 u16 y1 = y;
387 u16 y2 = y + h - 1;
388
389 u8 buf[5];
390 buf[0] = MIPI_DCS_SET_COLUMN_ADDRESS;
391 buf[1] = (x1 >> 8) & 0xff;
392 buf[2] = (x1 >> 0) & 0xff;
393 buf[3] = (x2 >> 8) & 0xff;
394 buf[4] = (x2 >> 0) & 0xff;
395
396 r = dsi_vc_dcs_write_nosync(td->dssdev, td->channel, buf, sizeof(buf));
397 if (r)
398 return r;
399
400 buf[0] = MIPI_DCS_SET_PAGE_ADDRESS;
401 buf[1] = (y1 >> 8) & 0xff;
402 buf[2] = (y1 >> 0) & 0xff;
403 buf[3] = (y2 >> 8) & 0xff;
404 buf[4] = (y2 >> 0) & 0xff;
405
406 r = dsi_vc_dcs_write_nosync(td->dssdev, td->channel, buf, sizeof(buf));
407 if (r)
408 return r;
409
410 dsi_vc_send_bta_sync(td->dssdev, td->channel);
411
412 return r;
413 }
414
415 static void taal_queue_esd_work(struct omap_dss_device *dssdev)
416 {
417 struct taal_data *td = dev_get_drvdata(&dssdev->dev);
418
419 if (td->esd_interval > 0)
420 queue_delayed_work(td->workqueue, &td->esd_work,
421 msecs_to_jiffies(td->esd_interval));
422 }
423
424 static void taal_cancel_esd_work(struct omap_dss_device *dssdev)
425 {
426 struct taal_data *td = dev_get_drvdata(&dssdev->dev);
427
428 cancel_delayed_work(&td->esd_work);
429 }
430
431 static void taal_queue_ulps_work(struct omap_dss_device *dssdev)
432 {
433 struct taal_data *td = dev_get_drvdata(&dssdev->dev);
434
435 if (td->ulps_timeout > 0)
436 queue_delayed_work(td->workqueue, &td->ulps_work,
437 msecs_to_jiffies(td->ulps_timeout));
438 }
439
440 static void taal_cancel_ulps_work(struct omap_dss_device *dssdev)
441 {
442 struct taal_data *td = dev_get_drvdata(&dssdev->dev);
443
444 cancel_delayed_work(&td->ulps_work);
445 }
446
447 static int taal_enter_ulps(struct omap_dss_device *dssdev)
448 {
449 struct taal_data *td = dev_get_drvdata(&dssdev->dev);
450 struct nokia_dsi_panel_data *panel_data = get_panel_data(dssdev);
451 int r;
452
453 if (td->ulps_enabled)
454 return 0;
455
456 taal_cancel_ulps_work(dssdev);
457
458 r = _taal_enable_te(dssdev, false);
459 if (r)
460 goto err;
461
462 disable_irq(gpio_to_irq(panel_data->ext_te_gpio));
463
464 omapdss_dsi_display_disable(dssdev, false, true);
465
466 td->ulps_enabled = true;
467
468 return 0;
469
470 err:
471 dev_err(&dssdev->dev, "enter ULPS failed");
472 taal_panel_reset(dssdev);
473
474 td->ulps_enabled = false;
475
476 taal_queue_ulps_work(dssdev);
477
478 return r;
479 }
480
481 static int taal_exit_ulps(struct omap_dss_device *dssdev)
482 {
483 struct taal_data *td = dev_get_drvdata(&dssdev->dev);
484 struct nokia_dsi_panel_data *panel_data = get_panel_data(dssdev);
485 int r;
486
487 if (!td->ulps_enabled)
488 return 0;
489
490 r = omapdss_dsi_display_enable(dssdev);
491 if (r) {
492 dev_err(&dssdev->dev, "failed to enable DSI\n");
493 goto err1;
494 }
495
496 omapdss_dsi_vc_enable_hs(dssdev, td->channel, true);
497
498 r = _taal_enable_te(dssdev, true);
499 if (r) {
500 dev_err(&dssdev->dev, "failed to re-enable TE");
501 goto err2;
502 }
503
504 enable_irq(gpio_to_irq(panel_data->ext_te_gpio));
505
506 taal_queue_ulps_work(dssdev);
507
508 td->ulps_enabled = false;
509
510 return 0;
511
512 err2:
513 dev_err(&dssdev->dev, "failed to exit ULPS");
514
515 r = taal_panel_reset(dssdev);
516 if (!r) {
517 enable_irq(gpio_to_irq(panel_data->ext_te_gpio));
518 td->ulps_enabled = false;
519 }
520 err1:
521 taal_queue_ulps_work(dssdev);
522
523 return r;
524 }
525
526 static int taal_wake_up(struct omap_dss_device *dssdev)
527 {
528 struct taal_data *td = dev_get_drvdata(&dssdev->dev);
529
530 if (td->ulps_enabled)
531 return taal_exit_ulps(dssdev);
532
533 taal_cancel_ulps_work(dssdev);
534 taal_queue_ulps_work(dssdev);
535 return 0;
536 }
537
538 static int taal_bl_update_status(struct backlight_device *dev)
539 {
540 struct omap_dss_device *dssdev = dev_get_drvdata(&dev->dev);
541 struct taal_data *td = dev_get_drvdata(&dssdev->dev);
542 int r;
543 int level;
544
545 if (dev->props.fb_blank == FB_BLANK_UNBLANK &&
546 dev->props.power == FB_BLANK_UNBLANK)
547 level = dev->props.brightness;
548 else
549 level = 0;
550
551 dev_dbg(&dssdev->dev, "update brightness to %d\n", level);
552
553 mutex_lock(&td->lock);
554
555 if (td->enabled) {
556 dsi_bus_lock(dssdev);
557
558 r = taal_wake_up(dssdev);
559 if (!r)
560 r = taal_dcs_write_1(td, DCS_BRIGHTNESS, level);
561
562 dsi_bus_unlock(dssdev);
563 } else {
564 r = 0;
565 }
566
567 mutex_unlock(&td->lock);
568
569 return r;
570 }
571
572 static int taal_bl_get_intensity(struct backlight_device *dev)
573 {
574 if (dev->props.fb_blank == FB_BLANK_UNBLANK &&
575 dev->props.power == FB_BLANK_UNBLANK)
576 return dev->props.brightness;
577
578 return 0;
579 }
580
581 static const struct backlight_ops taal_bl_ops = {
582 .get_brightness = taal_bl_get_intensity,
583 .update_status = taal_bl_update_status,
584 };
585
586 static void taal_get_timings(struct omap_dss_device *dssdev,
587 struct omap_video_timings *timings)
588 {
589 *timings = dssdev->panel.timings;
590 }
591
592 static void taal_get_resolution(struct omap_dss_device *dssdev,
593 u16 *xres, u16 *yres)
594 {
595 struct taal_data *td = dev_get_drvdata(&dssdev->dev);
596
597 if (td->rotate == 0 || td->rotate == 2) {
598 *xres = dssdev->panel.timings.x_res;
599 *yres = dssdev->panel.timings.y_res;
600 } else {
601 *yres = dssdev->panel.timings.x_res;
602 *xres = dssdev->panel.timings.y_res;
603 }
604 }
605
606 static ssize_t taal_num_errors_show(struct device *dev,
607 struct device_attribute *attr, char *buf)
608 {
609 struct omap_dss_device *dssdev = to_dss_device(dev);
610 struct taal_data *td = dev_get_drvdata(&dssdev->dev);
611 u8 errors;
612 int r;
613
614 mutex_lock(&td->lock);
615
616 if (td->enabled) {
617 dsi_bus_lock(dssdev);
618
619 r = taal_wake_up(dssdev);
620 if (!r)
621 r = taal_dcs_read_1(td, DCS_READ_NUM_ERRORS, &errors);
622
623 dsi_bus_unlock(dssdev);
624 } else {
625 r = -ENODEV;
626 }
627
628 mutex_unlock(&td->lock);
629
630 if (r)
631 return r;
632
633 return snprintf(buf, PAGE_SIZE, "%d\n", errors);
634 }
635
636 static ssize_t taal_hw_revision_show(struct device *dev,
637 struct device_attribute *attr, char *buf)
638 {
639 struct omap_dss_device *dssdev = to_dss_device(dev);
640 struct taal_data *td = dev_get_drvdata(&dssdev->dev);
641 u8 id1, id2, id3;
642 int r;
643
644 mutex_lock(&td->lock);
645
646 if (td->enabled) {
647 dsi_bus_lock(dssdev);
648
649 r = taal_wake_up(dssdev);
650 if (!r)
651 r = taal_get_id(td, &id1, &id2, &id3);
652
653 dsi_bus_unlock(dssdev);
654 } else {
655 r = -ENODEV;
656 }
657
658 mutex_unlock(&td->lock);
659
660 if (r)
661 return r;
662
663 return snprintf(buf, PAGE_SIZE, "%02x.%02x.%02x\n", id1, id2, id3);
664 }
665
666 static const char *cabc_modes[] = {
667 "off", /* used also always when CABC is not supported */
668 "ui",
669 "still-image",
670 "moving-image",
671 };
672
673 static ssize_t show_cabc_mode(struct device *dev,
674 struct device_attribute *attr,
675 char *buf)
676 {
677 struct omap_dss_device *dssdev = to_dss_device(dev);
678 struct taal_data *td = dev_get_drvdata(&dssdev->dev);
679 const char *mode_str;
680 int mode;
681 int len;
682
683 mode = td->cabc_mode;
684
685 mode_str = "unknown";
686 if (mode >= 0 && mode < ARRAY_SIZE(cabc_modes))
687 mode_str = cabc_modes[mode];
688 len = snprintf(buf, PAGE_SIZE, "%s\n", mode_str);
689
690 return len < PAGE_SIZE - 1 ? len : PAGE_SIZE - 1;
691 }
692
693 static ssize_t store_cabc_mode(struct device *dev,
694 struct device_attribute *attr,
695 const char *buf, size_t count)
696 {
697 struct omap_dss_device *dssdev = to_dss_device(dev);
698 struct taal_data *td = dev_get_drvdata(&dssdev->dev);
699 int i;
700 int r;
701
702 for (i = 0; i < ARRAY_SIZE(cabc_modes); i++) {
703 if (sysfs_streq(cabc_modes[i], buf))
704 break;
705 }
706
707 if (i == ARRAY_SIZE(cabc_modes))
708 return -EINVAL;
709
710 mutex_lock(&td->lock);
711
712 if (td->enabled) {
713 dsi_bus_lock(dssdev);
714
715 if (!td->cabc_broken) {
716 r = taal_wake_up(dssdev);
717 if (r)
718 goto err;
719
720 r = taal_dcs_write_1(td, DCS_WRITE_CABC, i);
721 if (r)
722 goto err;
723 }
724
725 dsi_bus_unlock(dssdev);
726 }
727
728 td->cabc_mode = i;
729
730 mutex_unlock(&td->lock);
731
732 return count;
733 err:
734 dsi_bus_unlock(dssdev);
735 mutex_unlock(&td->lock);
736 return r;
737 }
738
739 static ssize_t show_cabc_available_modes(struct device *dev,
740 struct device_attribute *attr,
741 char *buf)
742 {
743 int len;
744 int i;
745
746 for (i = 0, len = 0;
747 len < PAGE_SIZE && i < ARRAY_SIZE(cabc_modes); i++)
748 len += snprintf(&buf[len], PAGE_SIZE - len, "%s%s%s",
749 i ? " " : "", cabc_modes[i],
750 i == ARRAY_SIZE(cabc_modes) - 1 ? "\n" : "");
751
752 return len < PAGE_SIZE ? len : PAGE_SIZE - 1;
753 }
754
755 static ssize_t taal_store_esd_interval(struct device *dev,
756 struct device_attribute *attr,
757 const char *buf, size_t count)
758 {
759 struct omap_dss_device *dssdev = to_dss_device(dev);
760 struct taal_data *td = dev_get_drvdata(&dssdev->dev);
761
762 unsigned long t;
763 int r;
764
765 r = strict_strtoul(buf, 10, &t);
766 if (r)
767 return r;
768
769 mutex_lock(&td->lock);
770 taal_cancel_esd_work(dssdev);
771 td->esd_interval = t;
772 if (td->enabled)
773 taal_queue_esd_work(dssdev);
774 mutex_unlock(&td->lock);
775
776 return count;
777 }
778
779 static ssize_t taal_show_esd_interval(struct device *dev,
780 struct device_attribute *attr,
781 char *buf)
782 {
783 struct omap_dss_device *dssdev = to_dss_device(dev);
784 struct taal_data *td = dev_get_drvdata(&dssdev->dev);
785 unsigned t;
786
787 mutex_lock(&td->lock);
788 t = td->esd_interval;
789 mutex_unlock(&td->lock);
790
791 return snprintf(buf, PAGE_SIZE, "%u\n", t);
792 }
793
794 static ssize_t taal_store_ulps(struct device *dev,
795 struct device_attribute *attr,
796 const char *buf, size_t count)
797 {
798 struct omap_dss_device *dssdev = to_dss_device(dev);
799 struct taal_data *td = dev_get_drvdata(&dssdev->dev);
800 unsigned long t;
801 int r;
802
803 r = strict_strtoul(buf, 10, &t);
804 if (r)
805 return r;
806
807 mutex_lock(&td->lock);
808
809 if (td->enabled) {
810 dsi_bus_lock(dssdev);
811
812 if (t)
813 r = taal_enter_ulps(dssdev);
814 else
815 r = taal_wake_up(dssdev);
816
817 dsi_bus_unlock(dssdev);
818 }
819
820 mutex_unlock(&td->lock);
821
822 if (r)
823 return r;
824
825 return count;
826 }
827
828 static ssize_t taal_show_ulps(struct device *dev,
829 struct device_attribute *attr,
830 char *buf)
831 {
832 struct omap_dss_device *dssdev = to_dss_device(dev);
833 struct taal_data *td = dev_get_drvdata(&dssdev->dev);
834 unsigned t;
835
836 mutex_lock(&td->lock);
837 t = td->ulps_enabled;
838 mutex_unlock(&td->lock);
839
840 return snprintf(buf, PAGE_SIZE, "%u\n", t);
841 }
842
843 static ssize_t taal_store_ulps_timeout(struct device *dev,
844 struct device_attribute *attr,
845 const char *buf, size_t count)
846 {
847 struct omap_dss_device *dssdev = to_dss_device(dev);
848 struct taal_data *td = dev_get_drvdata(&dssdev->dev);
849 unsigned long t;
850 int r;
851
852 r = strict_strtoul(buf, 10, &t);
853 if (r)
854 return r;
855
856 mutex_lock(&td->lock);
857 td->ulps_timeout = t;
858
859 if (td->enabled) {
860 /* taal_wake_up will restart the timer */
861 dsi_bus_lock(dssdev);
862 r = taal_wake_up(dssdev);
863 dsi_bus_unlock(dssdev);
864 }
865
866 mutex_unlock(&td->lock);
867
868 if (r)
869 return r;
870
871 return count;
872 }
873
874 static ssize_t taal_show_ulps_timeout(struct device *dev,
875 struct device_attribute *attr,
876 char *buf)
877 {
878 struct omap_dss_device *dssdev = to_dss_device(dev);
879 struct taal_data *td = dev_get_drvdata(&dssdev->dev);
880 unsigned t;
881
882 mutex_lock(&td->lock);
883 t = td->ulps_timeout;
884 mutex_unlock(&td->lock);
885
886 return snprintf(buf, PAGE_SIZE, "%u\n", t);
887 }
888
889 static DEVICE_ATTR(num_dsi_errors, S_IRUGO, taal_num_errors_show, NULL);
890 static DEVICE_ATTR(hw_revision, S_IRUGO, taal_hw_revision_show, NULL);
891 static DEVICE_ATTR(cabc_mode, S_IRUGO | S_IWUSR,
892 show_cabc_mode, store_cabc_mode);
893 static DEVICE_ATTR(cabc_available_modes, S_IRUGO,
894 show_cabc_available_modes, NULL);
895 static DEVICE_ATTR(esd_interval, S_IRUGO | S_IWUSR,
896 taal_show_esd_interval, taal_store_esd_interval);
897 static DEVICE_ATTR(ulps, S_IRUGO | S_IWUSR,
898 taal_show_ulps, taal_store_ulps);
899 static DEVICE_ATTR(ulps_timeout, S_IRUGO | S_IWUSR,
900 taal_show_ulps_timeout, taal_store_ulps_timeout);
901
902 static struct attribute *taal_attrs[] = {
903 &dev_attr_num_dsi_errors.attr,
904 &dev_attr_hw_revision.attr,
905 &dev_attr_cabc_mode.attr,
906 &dev_attr_cabc_available_modes.attr,
907 &dev_attr_esd_interval.attr,
908 &dev_attr_ulps.attr,
909 &dev_attr_ulps_timeout.attr,
910 NULL,
911 };
912
913 static struct attribute_group taal_attr_group = {
914 .attrs = taal_attrs,
915 };
916
917 static void taal_hw_reset(struct omap_dss_device *dssdev)
918 {
919 struct taal_data *td = dev_get_drvdata(&dssdev->dev);
920 struct nokia_dsi_panel_data *panel_data = get_panel_data(dssdev);
921
922 if (panel_data->reset_gpio == -1)
923 return;
924
925 gpio_set_value(panel_data->reset_gpio, 1);
926 if (td->panel_config->reset_sequence.high)
927 udelay(td->panel_config->reset_sequence.high);
928 /* reset the panel */
929 gpio_set_value(panel_data->reset_gpio, 0);
930 /* assert reset */
931 if (td->panel_config->reset_sequence.low)
932 udelay(td->panel_config->reset_sequence.low);
933 gpio_set_value(panel_data->reset_gpio, 1);
934 /* wait after releasing reset */
935 if (td->panel_config->sleep.hw_reset)
936 msleep(td->panel_config->sleep.hw_reset);
937 }
938
939 static int taal_probe(struct omap_dss_device *dssdev)
940 {
941 struct backlight_properties props;
942 struct taal_data *td;
943 struct backlight_device *bldev = NULL;
944 struct nokia_dsi_panel_data *panel_data = get_panel_data(dssdev);
945 struct panel_config *panel_config = NULL;
946 int r, i;
947
948 dev_dbg(&dssdev->dev, "probe\n");
949
950 if (!panel_data || !panel_data->name) {
951 r = -EINVAL;
952 goto err;
953 }
954
955 for (i = 0; i < ARRAY_SIZE(panel_configs); i++) {
956 if (strcmp(panel_data->name, panel_configs[i].name) == 0) {
957 panel_config = &panel_configs[i];
958 break;
959 }
960 }
961
962 if (!panel_config) {
963 r = -EINVAL;
964 goto err;
965 }
966
967 dssdev->panel.config = OMAP_DSS_LCD_TFT;
968 dssdev->panel.timings = panel_config->timings;
969 dssdev->panel.dsi_pix_fmt = OMAP_DSS_DSI_FMT_RGB888;
970
971 td = kzalloc(sizeof(*td), GFP_KERNEL);
972 if (!td) {
973 r = -ENOMEM;
974 goto err;
975 }
976 td->dssdev = dssdev;
977 td->panel_config = panel_config;
978 td->esd_interval = panel_data->esd_interval;
979 td->ulps_enabled = false;
980 td->ulps_timeout = panel_data->ulps_timeout;
981
982 mutex_init(&td->lock);
983
984 atomic_set(&td->do_update, 0);
985
986 r = init_regulators(dssdev, panel_config->regulators,
987 panel_config->num_regulators);
988 if (r)
989 goto err_reg;
990
991 td->workqueue = create_singlethread_workqueue("taal_esd");
992 if (td->workqueue == NULL) {
993 dev_err(&dssdev->dev, "can't create ESD workqueue\n");
994 r = -ENOMEM;
995 goto err_wq;
996 }
997 INIT_DELAYED_WORK_DEFERRABLE(&td->esd_work, taal_esd_work);
998 INIT_DELAYED_WORK(&td->ulps_work, taal_ulps_work);
999
1000 dev_set_drvdata(&dssdev->dev, td);
1001
1002 taal_hw_reset(dssdev);
1003
1004 if (panel_data->use_dsi_backlight) {
1005 memset(&props, 0, sizeof(struct backlight_properties));
1006 props.max_brightness = 255;
1007
1008 props.type = BACKLIGHT_RAW;
1009 bldev = backlight_device_register(dev_name(&dssdev->dev),
1010 &dssdev->dev, dssdev, &taal_bl_ops, &props);
1011 if (IS_ERR(bldev)) {
1012 r = PTR_ERR(bldev);
1013 goto err_bl;
1014 }
1015
1016 td->bldev = bldev;
1017
1018 bldev->props.fb_blank = FB_BLANK_UNBLANK;
1019 bldev->props.power = FB_BLANK_UNBLANK;
1020 bldev->props.brightness = 255;
1021
1022 taal_bl_update_status(bldev);
1023 }
1024
1025 if (panel_data->use_ext_te) {
1026 int gpio = panel_data->ext_te_gpio;
1027
1028 r = gpio_request(gpio, "taal irq");
1029 if (r) {
1030 dev_err(&dssdev->dev, "GPIO request failed\n");
1031 goto err_gpio;
1032 }
1033
1034 gpio_direction_input(gpio);
1035
1036 r = request_irq(gpio_to_irq(gpio), taal_te_isr,
1037 IRQF_TRIGGER_RISING,
1038 "taal vsync", dssdev);
1039
1040 if (r) {
1041 dev_err(&dssdev->dev, "IRQ request failed\n");
1042 gpio_free(gpio);
1043 goto err_irq;
1044 }
1045
1046 INIT_DELAYED_WORK_DEFERRABLE(&td->te_timeout_work,
1047 taal_te_timeout_work_callback);
1048
1049 dev_dbg(&dssdev->dev, "Using GPIO TE\n");
1050 }
1051
1052 r = omap_dsi_request_vc(dssdev, &td->channel);
1053 if (r) {
1054 dev_err(&dssdev->dev, "failed to get virtual channel\n");
1055 goto err_req_vc;
1056 }
1057
1058 r = omap_dsi_set_vc_id(dssdev, td->channel, TCH);
1059 if (r) {
1060 dev_err(&dssdev->dev, "failed to set VC_ID\n");
1061 goto err_vc_id;
1062 }
1063
1064 r = sysfs_create_group(&dssdev->dev.kobj, &taal_attr_group);
1065 if (r) {
1066 dev_err(&dssdev->dev, "failed to create sysfs files\n");
1067 goto err_vc_id;
1068 }
1069
1070 return 0;
1071
1072 err_vc_id:
1073 omap_dsi_release_vc(dssdev, td->channel);
1074 err_req_vc:
1075 if (panel_data->use_ext_te)
1076 free_irq(gpio_to_irq(panel_data->ext_te_gpio), dssdev);
1077 err_irq:
1078 if (panel_data->use_ext_te)
1079 gpio_free(panel_data->ext_te_gpio);
1080 err_gpio:
1081 if (bldev != NULL)
1082 backlight_device_unregister(bldev);
1083 err_bl:
1084 destroy_workqueue(td->workqueue);
1085 err_wq:
1086 free_regulators(panel_config->regulators, panel_config->num_regulators);
1087 err_reg:
1088 kfree(td);
1089 err:
1090 return r;
1091 }
1092
1093 static void __exit taal_remove(struct omap_dss_device *dssdev)
1094 {
1095 struct taal_data *td = dev_get_drvdata(&dssdev->dev);
1096 struct nokia_dsi_panel_data *panel_data = get_panel_data(dssdev);
1097 struct backlight_device *bldev;
1098
1099 dev_dbg(&dssdev->dev, "remove\n");
1100
1101 sysfs_remove_group(&dssdev->dev.kobj, &taal_attr_group);
1102 omap_dsi_release_vc(dssdev, td->channel);
1103
1104 if (panel_data->use_ext_te) {
1105 int gpio = panel_data->ext_te_gpio;
1106 free_irq(gpio_to_irq(gpio), dssdev);
1107 gpio_free(gpio);
1108 }
1109
1110 bldev = td->bldev;
1111 if (bldev != NULL) {
1112 bldev->props.power = FB_BLANK_POWERDOWN;
1113 taal_bl_update_status(bldev);
1114 backlight_device_unregister(bldev);
1115 }
1116
1117 taal_cancel_ulps_work(dssdev);
1118 taal_cancel_esd_work(dssdev);
1119 destroy_workqueue(td->workqueue);
1120
1121 /* reset, to be sure that the panel is in a valid state */
1122 taal_hw_reset(dssdev);
1123
1124 free_regulators(td->panel_config->regulators,
1125 td->panel_config->num_regulators);
1126
1127 kfree(td);
1128 }
1129
1130 static int taal_power_on(struct omap_dss_device *dssdev)
1131 {
1132 struct taal_data *td = dev_get_drvdata(&dssdev->dev);
1133 u8 id1, id2, id3;
1134 int r;
1135
1136 r = omapdss_dsi_display_enable(dssdev);
1137 if (r) {
1138 dev_err(&dssdev->dev, "failed to enable DSI\n");
1139 goto err0;
1140 }
1141
1142 taal_hw_reset(dssdev);
1143
1144 omapdss_dsi_vc_enable_hs(dssdev, td->channel, false);
1145
1146 r = taal_sleep_out(td);
1147 if (r)
1148 goto err;
1149
1150 r = taal_get_id(td, &id1, &id2, &id3);
1151 if (r)
1152 goto err;
1153
1154 /* on early Taal revisions CABC is broken */
1155 if (td->panel_config->type == PANEL_TAAL &&
1156 (id2 == 0x00 || id2 == 0xff || id2 == 0x81))
1157 td->cabc_broken = true;
1158
1159 r = taal_dcs_write_1(td, DCS_BRIGHTNESS, 0xff);
1160 if (r)
1161 goto err;
1162
1163 r = taal_dcs_write_1(td, DCS_CTRL_DISPLAY,
1164 (1<<2) | (1<<5)); /* BL | BCTRL */
1165 if (r)
1166 goto err;
1167
1168 r = taal_dcs_write_1(td, MIPI_DCS_SET_PIXEL_FORMAT,
1169 MIPI_DCS_PIXEL_FMT_24BIT);
1170 if (r)
1171 goto err;
1172
1173 r = taal_set_addr_mode(td, td->rotate, td->mirror);
1174 if (r)
1175 goto err;
1176
1177 if (!td->cabc_broken) {
1178 r = taal_dcs_write_1(td, DCS_WRITE_CABC, td->cabc_mode);
1179 if (r)
1180 goto err;
1181 }
1182
1183 r = taal_dcs_write_0(td, MIPI_DCS_SET_DISPLAY_ON);
1184 if (r)
1185 goto err;
1186
1187 r = _taal_enable_te(dssdev, td->te_enabled);
1188 if (r)
1189 goto err;
1190
1191 td->enabled = 1;
1192
1193 if (!td->intro_printed) {
1194 dev_info(&dssdev->dev, "%s panel revision %02x.%02x.%02x\n",
1195 td->panel_config->name, id1, id2, id3);
1196 if (td->cabc_broken)
1197 dev_info(&dssdev->dev,
1198 "old Taal version, CABC disabled\n");
1199 td->intro_printed = true;
1200 }
1201
1202 omapdss_dsi_vc_enable_hs(dssdev, td->channel, true);
1203
1204 return 0;
1205 err:
1206 dev_err(&dssdev->dev, "error while enabling panel, issuing HW reset\n");
1207
1208 taal_hw_reset(dssdev);
1209
1210 omapdss_dsi_display_disable(dssdev, true, false);
1211 err0:
1212 return r;
1213 }
1214
1215 static void taal_power_off(struct omap_dss_device *dssdev)
1216 {
1217 struct taal_data *td = dev_get_drvdata(&dssdev->dev);
1218 int r;
1219
1220 r = taal_dcs_write_0(td, MIPI_DCS_SET_DISPLAY_OFF);
1221 if (!r)
1222 r = taal_sleep_in(td);
1223
1224 if (r) {
1225 dev_err(&dssdev->dev,
1226 "error disabling panel, issuing HW reset\n");
1227 taal_hw_reset(dssdev);
1228 }
1229
1230 omapdss_dsi_display_disable(dssdev, true, false);
1231
1232 td->enabled = 0;
1233 }
1234
1235 static int taal_panel_reset(struct omap_dss_device *dssdev)
1236 {
1237 dev_err(&dssdev->dev, "performing LCD reset\n");
1238
1239 taal_power_off(dssdev);
1240 taal_hw_reset(dssdev);
1241 return taal_power_on(dssdev);
1242 }
1243
1244 static int taal_enable(struct omap_dss_device *dssdev)
1245 {
1246 struct taal_data *td = dev_get_drvdata(&dssdev->dev);
1247 int r;
1248
1249 dev_dbg(&dssdev->dev, "enable\n");
1250
1251 mutex_lock(&td->lock);
1252
1253 if (dssdev->state != OMAP_DSS_DISPLAY_DISABLED) {
1254 r = -EINVAL;
1255 goto err;
1256 }
1257
1258 dsi_bus_lock(dssdev);
1259
1260 r = taal_power_on(dssdev);
1261
1262 dsi_bus_unlock(dssdev);
1263
1264 if (r)
1265 goto err;
1266
1267 taal_queue_esd_work(dssdev);
1268
1269 dssdev->state = OMAP_DSS_DISPLAY_ACTIVE;
1270
1271 mutex_unlock(&td->lock);
1272
1273 return 0;
1274 err:
1275 dev_dbg(&dssdev->dev, "enable failed\n");
1276 mutex_unlock(&td->lock);
1277 return r;
1278 }
1279
1280 static void taal_disable(struct omap_dss_device *dssdev)
1281 {
1282 struct taal_data *td = dev_get_drvdata(&dssdev->dev);
1283
1284 dev_dbg(&dssdev->dev, "disable\n");
1285
1286 mutex_lock(&td->lock);
1287
1288 taal_cancel_ulps_work(dssdev);
1289 taal_cancel_esd_work(dssdev);
1290
1291 dsi_bus_lock(dssdev);
1292
1293 if (dssdev->state == OMAP_DSS_DISPLAY_ACTIVE) {
1294 int r;
1295
1296 r = taal_wake_up(dssdev);
1297 if (!r)
1298 taal_power_off(dssdev);
1299 }
1300
1301 dsi_bus_unlock(dssdev);
1302
1303 dssdev->state = OMAP_DSS_DISPLAY_DISABLED;
1304
1305 mutex_unlock(&td->lock);
1306 }
1307
1308 static int taal_suspend(struct omap_dss_device *dssdev)
1309 {
1310 struct taal_data *td = dev_get_drvdata(&dssdev->dev);
1311 int r;
1312
1313 dev_dbg(&dssdev->dev, "suspend\n");
1314
1315 mutex_lock(&td->lock);
1316
1317 if (dssdev->state != OMAP_DSS_DISPLAY_ACTIVE) {
1318 r = -EINVAL;
1319 goto err;
1320 }
1321
1322 taal_cancel_ulps_work(dssdev);
1323 taal_cancel_esd_work(dssdev);
1324
1325 dsi_bus_lock(dssdev);
1326
1327 r = taal_wake_up(dssdev);
1328 if (!r)
1329 taal_power_off(dssdev);
1330
1331 dsi_bus_unlock(dssdev);
1332
1333 dssdev->state = OMAP_DSS_DISPLAY_SUSPENDED;
1334
1335 mutex_unlock(&td->lock);
1336
1337 return 0;
1338 err:
1339 mutex_unlock(&td->lock);
1340 return r;
1341 }
1342
1343 static int taal_resume(struct omap_dss_device *dssdev)
1344 {
1345 struct taal_data *td = dev_get_drvdata(&dssdev->dev);
1346 int r;
1347
1348 dev_dbg(&dssdev->dev, "resume\n");
1349
1350 mutex_lock(&td->lock);
1351
1352 if (dssdev->state != OMAP_DSS_DISPLAY_SUSPENDED) {
1353 r = -EINVAL;
1354 goto err;
1355 }
1356
1357 dsi_bus_lock(dssdev);
1358
1359 r = taal_power_on(dssdev);
1360
1361 dsi_bus_unlock(dssdev);
1362
1363 if (r) {
1364 dssdev->state = OMAP_DSS_DISPLAY_DISABLED;
1365 } else {
1366 dssdev->state = OMAP_DSS_DISPLAY_ACTIVE;
1367 taal_queue_esd_work(dssdev);
1368 }
1369
1370 mutex_unlock(&td->lock);
1371
1372 return r;
1373 err:
1374 mutex_unlock(&td->lock);
1375 return r;
1376 }
1377
1378 static void taal_framedone_cb(int err, void *data)
1379 {
1380 struct omap_dss_device *dssdev = data;
1381 dev_dbg(&dssdev->dev, "framedone, err %d\n", err);
1382 dsi_bus_unlock(dssdev);
1383 }
1384
1385 static irqreturn_t taal_te_isr(int irq, void *data)
1386 {
1387 struct omap_dss_device *dssdev = data;
1388 struct taal_data *td = dev_get_drvdata(&dssdev->dev);
1389 int old;
1390 int r;
1391
1392 old = atomic_cmpxchg(&td->do_update, 1, 0);
1393
1394 if (old) {
1395 cancel_delayed_work(&td->te_timeout_work);
1396
1397 r = omap_dsi_update(dssdev, td->channel,
1398 td->update_region.x,
1399 td->update_region.y,
1400 td->update_region.w,
1401 td->update_region.h,
1402 taal_framedone_cb, dssdev);
1403 if (r)
1404 goto err;
1405 }
1406
1407 return IRQ_HANDLED;
1408 err:
1409 dev_err(&dssdev->dev, "start update failed\n");
1410 dsi_bus_unlock(dssdev);
1411 return IRQ_HANDLED;
1412 }
1413
1414 static void taal_te_timeout_work_callback(struct work_struct *work)
1415 {
1416 struct taal_data *td = container_of(work, struct taal_data,
1417 te_timeout_work.work);
1418 struct omap_dss_device *dssdev = td->dssdev;
1419
1420 dev_err(&dssdev->dev, "TE not received for 250ms!\n");
1421
1422 atomic_set(&td->do_update, 0);
1423 dsi_bus_unlock(dssdev);
1424 }
1425
1426 static int taal_update(struct omap_dss_device *dssdev,
1427 u16 x, u16 y, u16 w, u16 h)
1428 {
1429 struct taal_data *td = dev_get_drvdata(&dssdev->dev);
1430 struct nokia_dsi_panel_data *panel_data = get_panel_data(dssdev);
1431 int r;
1432
1433 dev_dbg(&dssdev->dev, "update %d, %d, %d x %d\n", x, y, w, h);
1434
1435 mutex_lock(&td->lock);
1436 dsi_bus_lock(dssdev);
1437
1438 r = taal_wake_up(dssdev);
1439 if (r)
1440 goto err;
1441
1442 if (!td->enabled) {
1443 r = 0;
1444 goto err;
1445 }
1446
1447 r = omap_dsi_prepare_update(dssdev, &x, &y, &w, &h, true);
1448 if (r)
1449 goto err;
1450
1451 r = taal_set_update_window(td, x, y, w, h);
1452 if (r)
1453 goto err;
1454
1455 if (td->te_enabled && panel_data->use_ext_te) {
1456 td->update_region.x = x;
1457 td->update_region.y = y;
1458 td->update_region.w = w;
1459 td->update_region.h = h;
1460 barrier();
1461 schedule_delayed_work(&td->te_timeout_work,
1462 msecs_to_jiffies(250));
1463 atomic_set(&td->do_update, 1);
1464 } else {
1465 r = omap_dsi_update(dssdev, td->channel, x, y, w, h,
1466 taal_framedone_cb, dssdev);
1467 if (r)
1468 goto err;
1469 }
1470
1471 /* note: no bus_unlock here. unlock is in framedone_cb */
1472 mutex_unlock(&td->lock);
1473 return 0;
1474 err:
1475 dsi_bus_unlock(dssdev);
1476 mutex_unlock(&td->lock);
1477 return r;
1478 }
1479
1480 static int taal_sync(struct omap_dss_device *dssdev)
1481 {
1482 struct taal_data *td = dev_get_drvdata(&dssdev->dev);
1483
1484 dev_dbg(&dssdev->dev, "sync\n");
1485
1486 mutex_lock(&td->lock);
1487 dsi_bus_lock(dssdev);
1488 dsi_bus_unlock(dssdev);
1489 mutex_unlock(&td->lock);
1490
1491 dev_dbg(&dssdev->dev, "sync done\n");
1492
1493 return 0;
1494 }
1495
1496 static int _taal_enable_te(struct omap_dss_device *dssdev, bool enable)
1497 {
1498 struct taal_data *td = dev_get_drvdata(&dssdev->dev);
1499 struct nokia_dsi_panel_data *panel_data = get_panel_data(dssdev);
1500 int r;
1501
1502 if (enable)
1503 r = taal_dcs_write_1(td, MIPI_DCS_SET_TEAR_ON, 0);
1504 else
1505 r = taal_dcs_write_0(td, MIPI_DCS_SET_TEAR_OFF);
1506
1507 if (!panel_data->use_ext_te)
1508 omapdss_dsi_enable_te(dssdev, enable);
1509
1510 if (td->panel_config->sleep.enable_te)
1511 msleep(td->panel_config->sleep.enable_te);
1512
1513 return r;
1514 }
1515
1516 static int taal_enable_te(struct omap_dss_device *dssdev, bool enable)
1517 {
1518 struct taal_data *td = dev_get_drvdata(&dssdev->dev);
1519 int r;
1520
1521 mutex_lock(&td->lock);
1522
1523 if (td->te_enabled == enable)
1524 goto end;
1525
1526 dsi_bus_lock(dssdev);
1527
1528 if (td->enabled) {
1529 r = taal_wake_up(dssdev);
1530 if (r)
1531 goto err;
1532
1533 r = _taal_enable_te(dssdev, enable);
1534 if (r)
1535 goto err;
1536 }
1537
1538 td->te_enabled = enable;
1539
1540 dsi_bus_unlock(dssdev);
1541 end:
1542 mutex_unlock(&td->lock);
1543
1544 return 0;
1545 err:
1546 dsi_bus_unlock(dssdev);
1547 mutex_unlock(&td->lock);
1548
1549 return r;
1550 }
1551
1552 static int taal_get_te(struct omap_dss_device *dssdev)
1553 {
1554 struct taal_data *td = dev_get_drvdata(&dssdev->dev);
1555 int r;
1556
1557 mutex_lock(&td->lock);
1558 r = td->te_enabled;
1559 mutex_unlock(&td->lock);
1560
1561 return r;
1562 }
1563
1564 static int taal_rotate(struct omap_dss_device *dssdev, u8 rotate)
1565 {
1566 struct taal_data *td = dev_get_drvdata(&dssdev->dev);
1567 int r;
1568
1569 dev_dbg(&dssdev->dev, "rotate %d\n", rotate);
1570
1571 mutex_lock(&td->lock);
1572
1573 if (td->rotate == rotate)
1574 goto end;
1575
1576 dsi_bus_lock(dssdev);
1577
1578 if (td->enabled) {
1579 r = taal_wake_up(dssdev);
1580 if (r)
1581 goto err;
1582
1583 r = taal_set_addr_mode(td, rotate, td->mirror);
1584 if (r)
1585 goto err;
1586 }
1587
1588 td->rotate = rotate;
1589
1590 dsi_bus_unlock(dssdev);
1591 end:
1592 mutex_unlock(&td->lock);
1593 return 0;
1594 err:
1595 dsi_bus_unlock(dssdev);
1596 mutex_unlock(&td->lock);
1597 return r;
1598 }
1599
1600 static u8 taal_get_rotate(struct omap_dss_device *dssdev)
1601 {
1602 struct taal_data *td = dev_get_drvdata(&dssdev->dev);
1603 int r;
1604
1605 mutex_lock(&td->lock);
1606 r = td->rotate;
1607 mutex_unlock(&td->lock);
1608
1609 return r;
1610 }
1611
1612 static int taal_mirror(struct omap_dss_device *dssdev, bool enable)
1613 {
1614 struct taal_data *td = dev_get_drvdata(&dssdev->dev);
1615 int r;
1616
1617 dev_dbg(&dssdev->dev, "mirror %d\n", enable);
1618
1619 mutex_lock(&td->lock);
1620
1621 if (td->mirror == enable)
1622 goto end;
1623
1624 dsi_bus_lock(dssdev);
1625 if (td->enabled) {
1626 r = taal_wake_up(dssdev);
1627 if (r)
1628 goto err;
1629
1630 r = taal_set_addr_mode(td, td->rotate, enable);
1631 if (r)
1632 goto err;
1633 }
1634
1635 td->mirror = enable;
1636
1637 dsi_bus_unlock(dssdev);
1638 end:
1639 mutex_unlock(&td->lock);
1640 return 0;
1641 err:
1642 dsi_bus_unlock(dssdev);
1643 mutex_unlock(&td->lock);
1644 return r;
1645 }
1646
1647 static bool taal_get_mirror(struct omap_dss_device *dssdev)
1648 {
1649 struct taal_data *td = dev_get_drvdata(&dssdev->dev);
1650 int r;
1651
1652 mutex_lock(&td->lock);
1653 r = td->mirror;
1654 mutex_unlock(&td->lock);
1655
1656 return r;
1657 }
1658
1659 static int taal_run_test(struct omap_dss_device *dssdev, int test_num)
1660 {
1661 struct taal_data *td = dev_get_drvdata(&dssdev->dev);
1662 u8 id1, id2, id3;
1663 int r;
1664
1665 mutex_lock(&td->lock);
1666
1667 if (!td->enabled) {
1668 r = -ENODEV;
1669 goto err1;
1670 }
1671
1672 dsi_bus_lock(dssdev);
1673
1674 r = taal_wake_up(dssdev);
1675 if (r)
1676 goto err2;
1677
1678 r = taal_dcs_read_1(td, DCS_GET_ID1, &id1);
1679 if (r)
1680 goto err2;
1681 r = taal_dcs_read_1(td, DCS_GET_ID2, &id2);
1682 if (r)
1683 goto err2;
1684 r = taal_dcs_read_1(td, DCS_GET_ID3, &id3);
1685 if (r)
1686 goto err2;
1687
1688 dsi_bus_unlock(dssdev);
1689 mutex_unlock(&td->lock);
1690 return 0;
1691 err2:
1692 dsi_bus_unlock(dssdev);
1693 err1:
1694 mutex_unlock(&td->lock);
1695 return r;
1696 }
1697
1698 static int taal_memory_read(struct omap_dss_device *dssdev,
1699 void *buf, size_t size,
1700 u16 x, u16 y, u16 w, u16 h)
1701 {
1702 int r;
1703 int first = 1;
1704 int plen;
1705 unsigned buf_used = 0;
1706 struct taal_data *td = dev_get_drvdata(&dssdev->dev);
1707
1708 if (size < w * h * 3)
1709 return -ENOMEM;
1710
1711 mutex_lock(&td->lock);
1712
1713 if (!td->enabled) {
1714 r = -ENODEV;
1715 goto err1;
1716 }
1717
1718 size = min(w * h * 3,
1719 dssdev->panel.timings.x_res *
1720 dssdev->panel.timings.y_res * 3);
1721
1722 dsi_bus_lock(dssdev);
1723
1724 r = taal_wake_up(dssdev);
1725 if (r)
1726 goto err2;
1727
1728 /* plen 1 or 2 goes into short packet. until checksum error is fixed,
1729 * use short packets. plen 32 works, but bigger packets seem to cause
1730 * an error. */
1731 if (size % 2)
1732 plen = 1;
1733 else
1734 plen = 2;
1735
1736 taal_set_update_window(td, x, y, w, h);
1737
1738 r = dsi_vc_set_max_rx_packet_size(dssdev, td->channel, plen);
1739 if (r)
1740 goto err2;
1741
1742 while (buf_used < size) {
1743 u8 dcs_cmd = first ? 0x2e : 0x3e;
1744 first = 0;
1745
1746 r = dsi_vc_dcs_read(dssdev, td->channel, dcs_cmd,
1747 buf + buf_used, size - buf_used);
1748
1749 if (r < 0) {
1750 dev_err(&dssdev->dev, "read error\n");
1751 goto err3;
1752 }
1753
1754 buf_used += r;
1755
1756 if (r < plen) {
1757 dev_err(&dssdev->dev, "short read\n");
1758 break;
1759 }
1760
1761 if (signal_pending(current)) {
1762 dev_err(&dssdev->dev, "signal pending, "
1763 "aborting memory read\n");
1764 r = -ERESTARTSYS;
1765 goto err3;
1766 }
1767 }
1768
1769 r = buf_used;
1770
1771 err3:
1772 dsi_vc_set_max_rx_packet_size(dssdev, td->channel, 1);
1773 err2:
1774 dsi_bus_unlock(dssdev);
1775 err1:
1776 mutex_unlock(&td->lock);
1777 return r;
1778 }
1779
1780 static void taal_ulps_work(struct work_struct *work)
1781 {
1782 struct taal_data *td = container_of(work, struct taal_data,
1783 ulps_work.work);
1784 struct omap_dss_device *dssdev = td->dssdev;
1785
1786 mutex_lock(&td->lock);
1787
1788 if (dssdev->state != OMAP_DSS_DISPLAY_ACTIVE || !td->enabled) {
1789 mutex_unlock(&td->lock);
1790 return;
1791 }
1792
1793 dsi_bus_lock(dssdev);
1794
1795 taal_enter_ulps(dssdev);
1796
1797 dsi_bus_unlock(dssdev);
1798 mutex_unlock(&td->lock);
1799 }
1800
1801 static void taal_esd_work(struct work_struct *work)
1802 {
1803 struct taal_data *td = container_of(work, struct taal_data,
1804 esd_work.work);
1805 struct omap_dss_device *dssdev = td->dssdev;
1806 struct nokia_dsi_panel_data *panel_data = get_panel_data(dssdev);
1807 u8 state1, state2;
1808 int r;
1809
1810 mutex_lock(&td->lock);
1811
1812 if (!td->enabled) {
1813 mutex_unlock(&td->lock);
1814 return;
1815 }
1816
1817 dsi_bus_lock(dssdev);
1818
1819 r = taal_wake_up(dssdev);
1820 if (r) {
1821 dev_err(&dssdev->dev, "failed to exit ULPS\n");
1822 goto err;
1823 }
1824
1825 r = taal_dcs_read_1(td, MIPI_DCS_GET_DIAGNOSTIC_RESULT, &state1);
1826 if (r) {
1827 dev_err(&dssdev->dev, "failed to read Taal status\n");
1828 goto err;
1829 }
1830
1831 /* Run self diagnostics */
1832 r = taal_sleep_out(td);
1833 if (r) {
1834 dev_err(&dssdev->dev, "failed to run Taal self-diagnostics\n");
1835 goto err;
1836 }
1837
1838 r = taal_dcs_read_1(td, MIPI_DCS_GET_DIAGNOSTIC_RESULT, &state2);
1839 if (r) {
1840 dev_err(&dssdev->dev, "failed to read Taal status\n");
1841 goto err;
1842 }
1843
1844 /* Each sleep out command will trigger a self diagnostic and flip
1845 * Bit6 if the test passes.
1846 */
1847 if (!((state1 ^ state2) & (1 << 6))) {
1848 dev_err(&dssdev->dev, "LCD self diagnostics failed\n");
1849 goto err;
1850 }
1851 /* Self-diagnostics result is also shown on TE GPIO line. We need
1852 * to re-enable TE after self diagnostics */
1853 if (td->te_enabled && panel_data->use_ext_te) {
1854 r = taal_dcs_write_1(td, MIPI_DCS_SET_TEAR_ON, 0);
1855 if (r)
1856 goto err;
1857 }
1858
1859 dsi_bus_unlock(dssdev);
1860
1861 taal_queue_esd_work(dssdev);
1862
1863 mutex_unlock(&td->lock);
1864 return;
1865 err:
1866 dev_err(&dssdev->dev, "performing LCD reset\n");
1867
1868 taal_panel_reset(dssdev);
1869
1870 dsi_bus_unlock(dssdev);
1871
1872 taal_queue_esd_work(dssdev);
1873
1874 mutex_unlock(&td->lock);
1875 }
1876
1877 static struct omap_dss_driver taal_driver = {
1878 .probe = taal_probe,
1879 .remove = __exit_p(taal_remove),
1880
1881 .enable = taal_enable,
1882 .disable = taal_disable,
1883 .suspend = taal_suspend,
1884 .resume = taal_resume,
1885
1886 .update = taal_update,
1887 .sync = taal_sync,
1888
1889 .get_resolution = taal_get_resolution,
1890 .get_recommended_bpp = omapdss_default_get_recommended_bpp,
1891
1892 .enable_te = taal_enable_te,
1893 .get_te = taal_get_te,
1894
1895 .set_rotate = taal_rotate,
1896 .get_rotate = taal_get_rotate,
1897 .set_mirror = taal_mirror,
1898 .get_mirror = taal_get_mirror,
1899 .run_test = taal_run_test,
1900 .memory_read = taal_memory_read,
1901
1902 .get_timings = taal_get_timings,
1903
1904 .driver = {
1905 .name = "taal",
1906 .owner = THIS_MODULE,
1907 },
1908 };
1909
1910 static int __init taal_init(void)
1911 {
1912 omap_dss_register_driver(&taal_driver);
1913
1914 return 0;
1915 }
1916
1917 static void __exit taal_exit(void)
1918 {
1919 omap_dss_unregister_driver(&taal_driver);
1920 }
1921
1922 module_init(taal_init);
1923 module_exit(taal_exit);
1924
1925 MODULE_AUTHOR("Tomi Valkeinen <tomi.valkeinen@nokia.com>");
1926 MODULE_DESCRIPTION("Taal Driver");
1927 MODULE_LICENSE("GPL");