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11#include <linux/backlight.h>
12#include <linux/delay.h>
13#include <linux/gpio/consumer.h>
14#include <linux/interrupt.h>
15#include <linux/jiffies.h>
16#include <linux/module.h>
17#include <linux/platform_device.h>
18#include <linux/sched/signal.h>
19#include <linux/slab.h>
20#include <linux/workqueue.h>
21#include <linux/of_device.h>
22#include <linux/regulator/consumer.h>
23
24#include <drm/drm_connector.h>
25
26#include <video/mipi_display.h>
27#include <video/of_display_timing.h>
28
29#include "../dss/omapdss.h"
30
31
32#define TCH 0
33
34#define DCS_READ_NUM_ERRORS 0x05
35#define DCS_BRIGHTNESS 0x51
36#define DCS_CTRL_DISPLAY 0x53
37#define DCS_GET_ID1 0xda
38#define DCS_GET_ID2 0xdb
39#define DCS_GET_ID3 0xdc
40
41struct panel_drv_data {
42 struct omap_dss_device dssdev;
43 struct omap_dss_device *src;
44
45 struct videomode vm;
46
47 struct platform_device *pdev;
48
49 struct mutex lock;
50
51 struct backlight_device *bldev;
52 struct backlight_device *extbldev;
53
54 unsigned long hw_guard_end;
55
56
57 unsigned long hw_guard_wait;
58
59
60 struct gpio_desc *reset_gpio;
61 struct gpio_desc *ext_te_gpio;
62
63 struct regulator *vpnl;
64 struct regulator *vddi;
65
66 bool use_dsi_backlight;
67
68 int width_mm;
69 int height_mm;
70
71 struct omap_dsi_pin_config pin_config;
72
73
74 bool enabled;
75
76 bool te_enabled;
77
78 atomic_t do_update;
79 int channel;
80
81 struct delayed_work te_timeout_work;
82
83 bool intro_printed;
84
85 struct workqueue_struct *workqueue;
86
87 bool ulps_enabled;
88 unsigned int ulps_timeout;
89 struct delayed_work ulps_work;
90};
91
92#define to_panel_data(p) container_of(p, struct panel_drv_data, dssdev)
93
94static irqreturn_t dsicm_te_isr(int irq, void *data);
95static void dsicm_te_timeout_work_callback(struct work_struct *work);
96static int _dsicm_enable_te(struct panel_drv_data *ddata, bool enable);
97
98static int dsicm_panel_reset(struct panel_drv_data *ddata);
99
100static void dsicm_ulps_work(struct work_struct *work);
101
102static void dsicm_bl_power(struct panel_drv_data *ddata, bool enable)
103{
104 struct backlight_device *backlight;
105
106 if (ddata->bldev)
107 backlight = ddata->bldev;
108 else if (ddata->extbldev)
109 backlight = ddata->extbldev;
110 else
111 return;
112
113 if (enable) {
114 backlight->props.fb_blank = FB_BLANK_UNBLANK;
115 backlight->props.state = ~(BL_CORE_FBBLANK | BL_CORE_SUSPENDED);
116 backlight->props.power = FB_BLANK_UNBLANK;
117 } else {
118 backlight->props.fb_blank = FB_BLANK_NORMAL;
119 backlight->props.power = FB_BLANK_POWERDOWN;
120 backlight->props.state |= BL_CORE_FBBLANK | BL_CORE_SUSPENDED;
121 }
122
123 backlight_update_status(backlight);
124}
125
126static void hw_guard_start(struct panel_drv_data *ddata, int guard_msec)
127{
128 ddata->hw_guard_wait = msecs_to_jiffies(guard_msec);
129 ddata->hw_guard_end = jiffies + ddata->hw_guard_wait;
130}
131
132static void hw_guard_wait(struct panel_drv_data *ddata)
133{
134 unsigned long wait = ddata->hw_guard_end - jiffies;
135
136 if ((long)wait > 0 && wait <= ddata->hw_guard_wait) {
137 set_current_state(TASK_UNINTERRUPTIBLE);
138 schedule_timeout(wait);
139 }
140}
141
142static int dsicm_dcs_read_1(struct panel_drv_data *ddata, u8 dcs_cmd, u8 *data)
143{
144 struct omap_dss_device *src = ddata->src;
145 int r;
146 u8 buf[1];
147
148 r = src->ops->dsi.dcs_read(src, ddata->channel, dcs_cmd, buf, 1);
149
150 if (r < 0)
151 return r;
152
153 *data = buf[0];
154
155 return 0;
156}
157
158static int dsicm_dcs_write_0(struct panel_drv_data *ddata, u8 dcs_cmd)
159{
160 struct omap_dss_device *src = ddata->src;
161
162 return src->ops->dsi.dcs_write(src, ddata->channel, &dcs_cmd, 1);
163}
164
165static int dsicm_dcs_write_1(struct panel_drv_data *ddata, u8 dcs_cmd, u8 param)
166{
167 struct omap_dss_device *src = ddata->src;
168 u8 buf[2] = { dcs_cmd, param };
169
170 return src->ops->dsi.dcs_write(src, ddata->channel, buf, 2);
171}
172
173static int dsicm_sleep_in(struct panel_drv_data *ddata)
174
175{
176 struct omap_dss_device *src = ddata->src;
177 u8 cmd;
178 int r;
179
180 hw_guard_wait(ddata);
181
182 cmd = MIPI_DCS_ENTER_SLEEP_MODE;
183 r = src->ops->dsi.dcs_write_nosync(src, ddata->channel, &cmd, 1);
184 if (r)
185 return r;
186
187 hw_guard_start(ddata, 120);
188
189 usleep_range(5000, 10000);
190
191 return 0;
192}
193
194static int dsicm_sleep_out(struct panel_drv_data *ddata)
195{
196 int r;
197
198 hw_guard_wait(ddata);
199
200 r = dsicm_dcs_write_0(ddata, MIPI_DCS_EXIT_SLEEP_MODE);
201 if (r)
202 return r;
203
204 hw_guard_start(ddata, 120);
205
206 usleep_range(5000, 10000);
207
208 return 0;
209}
210
211static int dsicm_get_id(struct panel_drv_data *ddata, u8 *id1, u8 *id2, u8 *id3)
212{
213 int r;
214
215 r = dsicm_dcs_read_1(ddata, DCS_GET_ID1, id1);
216 if (r)
217 return r;
218 r = dsicm_dcs_read_1(ddata, DCS_GET_ID2, id2);
219 if (r)
220 return r;
221 r = dsicm_dcs_read_1(ddata, DCS_GET_ID3, id3);
222 if (r)
223 return r;
224
225 return 0;
226}
227
228static int dsicm_set_update_window(struct panel_drv_data *ddata,
229 u16 x, u16 y, u16 w, u16 h)
230{
231 struct omap_dss_device *src = ddata->src;
232 int r;
233 u16 x1 = x;
234 u16 x2 = x + w - 1;
235 u16 y1 = y;
236 u16 y2 = y + h - 1;
237
238 u8 buf[5];
239 buf[0] = MIPI_DCS_SET_COLUMN_ADDRESS;
240 buf[1] = (x1 >> 8) & 0xff;
241 buf[2] = (x1 >> 0) & 0xff;
242 buf[3] = (x2 >> 8) & 0xff;
243 buf[4] = (x2 >> 0) & 0xff;
244
245 r = src->ops->dsi.dcs_write_nosync(src, ddata->channel, buf, sizeof(buf));
246 if (r)
247 return r;
248
249 buf[0] = MIPI_DCS_SET_PAGE_ADDRESS;
250 buf[1] = (y1 >> 8) & 0xff;
251 buf[2] = (y1 >> 0) & 0xff;
252 buf[3] = (y2 >> 8) & 0xff;
253 buf[4] = (y2 >> 0) & 0xff;
254
255 r = src->ops->dsi.dcs_write_nosync(src, ddata->channel, buf, sizeof(buf));
256 if (r)
257 return r;
258
259 src->ops->dsi.bta_sync(src, ddata->channel);
260
261 return r;
262}
263
264static void dsicm_queue_ulps_work(struct panel_drv_data *ddata)
265{
266 if (ddata->ulps_timeout > 0)
267 queue_delayed_work(ddata->workqueue, &ddata->ulps_work,
268 msecs_to_jiffies(ddata->ulps_timeout));
269}
270
271static void dsicm_cancel_ulps_work(struct panel_drv_data *ddata)
272{
273 cancel_delayed_work(&ddata->ulps_work);
274}
275
276static int dsicm_enter_ulps(struct panel_drv_data *ddata)
277{
278 struct omap_dss_device *src = ddata->src;
279 int r;
280
281 if (ddata->ulps_enabled)
282 return 0;
283
284 dsicm_cancel_ulps_work(ddata);
285
286 r = _dsicm_enable_te(ddata, false);
287 if (r)
288 goto err;
289
290 if (ddata->ext_te_gpio)
291 disable_irq(gpiod_to_irq(ddata->ext_te_gpio));
292
293 src->ops->dsi.disable(src, false, true);
294
295 ddata->ulps_enabled = true;
296
297 return 0;
298
299err:
300 dev_err(&ddata->pdev->dev, "enter ULPS failed");
301 dsicm_panel_reset(ddata);
302
303 ddata->ulps_enabled = false;
304
305 dsicm_queue_ulps_work(ddata);
306
307 return r;
308}
309
310static int dsicm_exit_ulps(struct panel_drv_data *ddata)
311{
312 struct omap_dss_device *src = ddata->src;
313 int r;
314
315 if (!ddata->ulps_enabled)
316 return 0;
317
318 src->ops->enable(src);
319 src->ops->dsi.enable_hs(src, ddata->channel, true);
320
321 r = _dsicm_enable_te(ddata, true);
322 if (r) {
323 dev_err(&ddata->pdev->dev, "failed to re-enable TE");
324 goto err2;
325 }
326
327 if (ddata->ext_te_gpio)
328 enable_irq(gpiod_to_irq(ddata->ext_te_gpio));
329
330 dsicm_queue_ulps_work(ddata);
331
332 ddata->ulps_enabled = false;
333
334 return 0;
335
336err2:
337 dev_err(&ddata->pdev->dev, "failed to exit ULPS");
338
339 r = dsicm_panel_reset(ddata);
340 if (!r) {
341 if (ddata->ext_te_gpio)
342 enable_irq(gpiod_to_irq(ddata->ext_te_gpio));
343 ddata->ulps_enabled = false;
344 }
345
346 dsicm_queue_ulps_work(ddata);
347
348 return r;
349}
350
351static int dsicm_wake_up(struct panel_drv_data *ddata)
352{
353 if (ddata->ulps_enabled)
354 return dsicm_exit_ulps(ddata);
355
356 dsicm_cancel_ulps_work(ddata);
357 dsicm_queue_ulps_work(ddata);
358 return 0;
359}
360
361static int dsicm_bl_update_status(struct backlight_device *dev)
362{
363 struct panel_drv_data *ddata = dev_get_drvdata(&dev->dev);
364 struct omap_dss_device *src = ddata->src;
365 int r = 0;
366 int level;
367
368 if (dev->props.fb_blank == FB_BLANK_UNBLANK &&
369 dev->props.power == FB_BLANK_UNBLANK)
370 level = dev->props.brightness;
371 else
372 level = 0;
373
374 dev_dbg(&ddata->pdev->dev, "update brightness to %d\n", level);
375
376 mutex_lock(&ddata->lock);
377
378 if (ddata->enabled) {
379 src->ops->dsi.bus_lock(src);
380
381 r = dsicm_wake_up(ddata);
382 if (!r)
383 r = dsicm_dcs_write_1(ddata, DCS_BRIGHTNESS, level);
384
385 src->ops->dsi.bus_unlock(src);
386 }
387
388 mutex_unlock(&ddata->lock);
389
390 return r;
391}
392
393static int dsicm_bl_get_intensity(struct backlight_device *dev)
394{
395 if (dev->props.fb_blank == FB_BLANK_UNBLANK &&
396 dev->props.power == FB_BLANK_UNBLANK)
397 return dev->props.brightness;
398
399 return 0;
400}
401
402static const struct backlight_ops dsicm_bl_ops = {
403 .get_brightness = dsicm_bl_get_intensity,
404 .update_status = dsicm_bl_update_status,
405};
406
407static ssize_t dsicm_num_errors_show(struct device *dev,
408 struct device_attribute *attr, char *buf)
409{
410 struct platform_device *pdev = to_platform_device(dev);
411 struct panel_drv_data *ddata = platform_get_drvdata(pdev);
412 struct omap_dss_device *src = ddata->src;
413 u8 errors = 0;
414 int r;
415
416 mutex_lock(&ddata->lock);
417
418 if (ddata->enabled) {
419 src->ops->dsi.bus_lock(src);
420
421 r = dsicm_wake_up(ddata);
422 if (!r)
423 r = dsicm_dcs_read_1(ddata, DCS_READ_NUM_ERRORS,
424 &errors);
425
426 src->ops->dsi.bus_unlock(src);
427 } else {
428 r = -ENODEV;
429 }
430
431 mutex_unlock(&ddata->lock);
432
433 if (r)
434 return r;
435
436 return snprintf(buf, PAGE_SIZE, "%d\n", errors);
437}
438
439static ssize_t dsicm_hw_revision_show(struct device *dev,
440 struct device_attribute *attr, char *buf)
441{
442 struct platform_device *pdev = to_platform_device(dev);
443 struct panel_drv_data *ddata = platform_get_drvdata(pdev);
444 struct omap_dss_device *src = ddata->src;
445 u8 id1, id2, id3;
446 int r;
447
448 mutex_lock(&ddata->lock);
449
450 if (ddata->enabled) {
451 src->ops->dsi.bus_lock(src);
452
453 r = dsicm_wake_up(ddata);
454 if (!r)
455 r = dsicm_get_id(ddata, &id1, &id2, &id3);
456
457 src->ops->dsi.bus_unlock(src);
458 } else {
459 r = -ENODEV;
460 }
461
462 mutex_unlock(&ddata->lock);
463
464 if (r)
465 return r;
466
467 return snprintf(buf, PAGE_SIZE, "%02x.%02x.%02x\n", id1, id2, id3);
468}
469
470static ssize_t dsicm_store_ulps(struct device *dev,
471 struct device_attribute *attr,
472 const char *buf, size_t count)
473{
474 struct platform_device *pdev = to_platform_device(dev);
475 struct panel_drv_data *ddata = platform_get_drvdata(pdev);
476 struct omap_dss_device *src = ddata->src;
477 unsigned long t;
478 int r;
479
480 r = kstrtoul(buf, 0, &t);
481 if (r)
482 return r;
483
484 mutex_lock(&ddata->lock);
485
486 if (ddata->enabled) {
487 src->ops->dsi.bus_lock(src);
488
489 if (t)
490 r = dsicm_enter_ulps(ddata);
491 else
492 r = dsicm_wake_up(ddata);
493
494 src->ops->dsi.bus_unlock(src);
495 }
496
497 mutex_unlock(&ddata->lock);
498
499 if (r)
500 return r;
501
502 return count;
503}
504
505static ssize_t dsicm_show_ulps(struct device *dev,
506 struct device_attribute *attr,
507 char *buf)
508{
509 struct platform_device *pdev = to_platform_device(dev);
510 struct panel_drv_data *ddata = platform_get_drvdata(pdev);
511 unsigned int t;
512
513 mutex_lock(&ddata->lock);
514 t = ddata->ulps_enabled;
515 mutex_unlock(&ddata->lock);
516
517 return snprintf(buf, PAGE_SIZE, "%u\n", t);
518}
519
520static ssize_t dsicm_store_ulps_timeout(struct device *dev,
521 struct device_attribute *attr,
522 const char *buf, size_t count)
523{
524 struct platform_device *pdev = to_platform_device(dev);
525 struct panel_drv_data *ddata = platform_get_drvdata(pdev);
526 struct omap_dss_device *src = ddata->src;
527 unsigned long t;
528 int r;
529
530 r = kstrtoul(buf, 0, &t);
531 if (r)
532 return r;
533
534 mutex_lock(&ddata->lock);
535 ddata->ulps_timeout = t;
536
537 if (ddata->enabled) {
538
539 src->ops->dsi.bus_lock(src);
540 r = dsicm_wake_up(ddata);
541 src->ops->dsi.bus_unlock(src);
542 }
543
544 mutex_unlock(&ddata->lock);
545
546 if (r)
547 return r;
548
549 return count;
550}
551
552static ssize_t dsicm_show_ulps_timeout(struct device *dev,
553 struct device_attribute *attr,
554 char *buf)
555{
556 struct platform_device *pdev = to_platform_device(dev);
557 struct panel_drv_data *ddata = platform_get_drvdata(pdev);
558 unsigned int t;
559
560 mutex_lock(&ddata->lock);
561 t = ddata->ulps_timeout;
562 mutex_unlock(&ddata->lock);
563
564 return snprintf(buf, PAGE_SIZE, "%u\n", t);
565}
566
567static DEVICE_ATTR(num_dsi_errors, S_IRUGO, dsicm_num_errors_show, NULL);
568static DEVICE_ATTR(hw_revision, S_IRUGO, dsicm_hw_revision_show, NULL);
569static DEVICE_ATTR(ulps, S_IRUGO | S_IWUSR,
570 dsicm_show_ulps, dsicm_store_ulps);
571static DEVICE_ATTR(ulps_timeout, S_IRUGO | S_IWUSR,
572 dsicm_show_ulps_timeout, dsicm_store_ulps_timeout);
573
574static struct attribute *dsicm_attrs[] = {
575 &dev_attr_num_dsi_errors.attr,
576 &dev_attr_hw_revision.attr,
577 &dev_attr_ulps.attr,
578 &dev_attr_ulps_timeout.attr,
579 NULL,
580};
581
582static const struct attribute_group dsicm_attr_group = {
583 .attrs = dsicm_attrs,
584};
585
586static void dsicm_hw_reset(struct panel_drv_data *ddata)
587{
588 gpiod_set_value(ddata->reset_gpio, 1);
589 udelay(10);
590
591 gpiod_set_value(ddata->reset_gpio, 0);
592
593 udelay(10);
594 gpiod_set_value(ddata->reset_gpio, 1);
595
596 usleep_range(5000, 10000);
597}
598
599static int dsicm_power_on(struct panel_drv_data *ddata)
600{
601 struct omap_dss_device *src = ddata->src;
602 u8 id1, id2, id3;
603 int r;
604 struct omap_dss_dsi_config dsi_config = {
605 .mode = OMAP_DSS_DSI_CMD_MODE,
606 .pixel_format = OMAP_DSS_DSI_FMT_RGB888,
607 .vm = &ddata->vm,
608 .hs_clk_min = 150000000,
609 .hs_clk_max = 300000000,
610 .lp_clk_min = 7000000,
611 .lp_clk_max = 10000000,
612 };
613
614 if (ddata->vpnl) {
615 r = regulator_enable(ddata->vpnl);
616 if (r) {
617 dev_err(&ddata->pdev->dev,
618 "failed to enable VPNL: %d\n", r);
619 return r;
620 }
621 }
622
623 if (ddata->vddi) {
624 r = regulator_enable(ddata->vddi);
625 if (r) {
626 dev_err(&ddata->pdev->dev,
627 "failed to enable VDDI: %d\n", r);
628 goto err_vpnl;
629 }
630 }
631
632 if (ddata->pin_config.num_pins > 0) {
633 r = src->ops->dsi.configure_pins(src, &ddata->pin_config);
634 if (r) {
635 dev_err(&ddata->pdev->dev,
636 "failed to configure DSI pins\n");
637 goto err_vddi;
638 }
639 }
640
641 r = src->ops->dsi.set_config(src, &dsi_config);
642 if (r) {
643 dev_err(&ddata->pdev->dev, "failed to configure DSI\n");
644 goto err_vddi;
645 }
646
647 src->ops->enable(src);
648
649 dsicm_hw_reset(ddata);
650
651 src->ops->dsi.enable_hs(src, ddata->channel, false);
652
653 r = dsicm_sleep_out(ddata);
654 if (r)
655 goto err;
656
657 r = dsicm_get_id(ddata, &id1, &id2, &id3);
658 if (r)
659 goto err;
660
661 r = dsicm_dcs_write_1(ddata, DCS_BRIGHTNESS, 0xff);
662 if (r)
663 goto err;
664
665 r = dsicm_dcs_write_1(ddata, DCS_CTRL_DISPLAY,
666 (1<<2) | (1<<5));
667 if (r)
668 goto err;
669
670 r = dsicm_dcs_write_1(ddata, MIPI_DCS_SET_PIXEL_FORMAT,
671 MIPI_DCS_PIXEL_FMT_24BIT);
672 if (r)
673 goto err;
674
675 r = dsicm_dcs_write_0(ddata, MIPI_DCS_SET_DISPLAY_ON);
676 if (r)
677 goto err;
678
679 r = _dsicm_enable_te(ddata, ddata->te_enabled);
680 if (r)
681 goto err;
682
683 r = src->ops->dsi.enable_video_output(src, ddata->channel);
684 if (r)
685 goto err;
686
687 ddata->enabled = 1;
688
689 if (!ddata->intro_printed) {
690 dev_info(&ddata->pdev->dev, "panel revision %02x.%02x.%02x\n",
691 id1, id2, id3);
692 ddata->intro_printed = true;
693 }
694
695 src->ops->dsi.enable_hs(src, ddata->channel, true);
696
697 return 0;
698err:
699 dev_err(&ddata->pdev->dev, "error while enabling panel, issuing HW reset\n");
700
701 dsicm_hw_reset(ddata);
702
703 src->ops->dsi.disable(src, true, false);
704err_vddi:
705 if (ddata->vddi)
706 regulator_disable(ddata->vddi);
707err_vpnl:
708 if (ddata->vpnl)
709 regulator_disable(ddata->vpnl);
710
711 return r;
712}
713
714static void dsicm_power_off(struct panel_drv_data *ddata)
715{
716 struct omap_dss_device *src = ddata->src;
717 int r;
718
719 src->ops->dsi.disable_video_output(src, ddata->channel);
720
721 r = dsicm_dcs_write_0(ddata, MIPI_DCS_SET_DISPLAY_OFF);
722 if (!r)
723 r = dsicm_sleep_in(ddata);
724
725 if (r) {
726 dev_err(&ddata->pdev->dev,
727 "error disabling panel, issuing HW reset\n");
728 dsicm_hw_reset(ddata);
729 }
730
731 src->ops->dsi.disable(src, true, false);
732
733 if (ddata->vddi)
734 regulator_disable(ddata->vddi);
735 if (ddata->vpnl)
736 regulator_disable(ddata->vpnl);
737
738 ddata->enabled = 0;
739}
740
741static int dsicm_panel_reset(struct panel_drv_data *ddata)
742{
743 dev_err(&ddata->pdev->dev, "performing LCD reset\n");
744
745 dsicm_power_off(ddata);
746 dsicm_hw_reset(ddata);
747 return dsicm_power_on(ddata);
748}
749
750static int dsicm_connect(struct omap_dss_device *src,
751 struct omap_dss_device *dst)
752{
753 struct panel_drv_data *ddata = to_panel_data(dst);
754 struct device *dev = &ddata->pdev->dev;
755 int r;
756
757 r = src->ops->dsi.request_vc(src, &ddata->channel);
758 if (r) {
759 dev_err(dev, "failed to get virtual channel\n");
760 return r;
761 }
762
763 r = src->ops->dsi.set_vc_id(src, ddata->channel, TCH);
764 if (r) {
765 dev_err(dev, "failed to set VC_ID\n");
766 src->ops->dsi.release_vc(src, ddata->channel);
767 return r;
768 }
769
770 ddata->src = src;
771 return 0;
772}
773
774static void dsicm_disconnect(struct omap_dss_device *src,
775 struct omap_dss_device *dst)
776{
777 struct panel_drv_data *ddata = to_panel_data(dst);
778
779 src->ops->dsi.release_vc(src, ddata->channel);
780 ddata->src = NULL;
781}
782
783static void dsicm_enable(struct omap_dss_device *dssdev)
784{
785 struct panel_drv_data *ddata = to_panel_data(dssdev);
786 struct omap_dss_device *src = ddata->src;
787 int r;
788
789 mutex_lock(&ddata->lock);
790
791 src->ops->dsi.bus_lock(src);
792
793 r = dsicm_power_on(ddata);
794
795 src->ops->dsi.bus_unlock(src);
796
797 if (r)
798 goto err;
799
800 mutex_unlock(&ddata->lock);
801
802 dsicm_bl_power(ddata, true);
803
804 return;
805err:
806 dev_dbg(&ddata->pdev->dev, "enable failed (%d)\n", r);
807 mutex_unlock(&ddata->lock);
808}
809
810static void dsicm_disable(struct omap_dss_device *dssdev)
811{
812 struct panel_drv_data *ddata = to_panel_data(dssdev);
813 struct omap_dss_device *src = ddata->src;
814 int r;
815
816 dsicm_bl_power(ddata, false);
817
818 mutex_lock(&ddata->lock);
819
820 dsicm_cancel_ulps_work(ddata);
821
822 src->ops->dsi.bus_lock(src);
823
824 r = dsicm_wake_up(ddata);
825 if (!r)
826 dsicm_power_off(ddata);
827
828 src->ops->dsi.bus_unlock(src);
829
830 mutex_unlock(&ddata->lock);
831}
832
833static void dsicm_framedone_cb(int err, void *data)
834{
835 struct panel_drv_data *ddata = data;
836 struct omap_dss_device *src = ddata->src;
837
838 dev_dbg(&ddata->pdev->dev, "framedone, err %d\n", err);
839 src->ops->dsi.bus_unlock(src);
840}
841
842static irqreturn_t dsicm_te_isr(int irq, void *data)
843{
844 struct panel_drv_data *ddata = data;
845 struct omap_dss_device *src = ddata->src;
846 int old;
847 int r;
848
849 old = atomic_cmpxchg(&ddata->do_update, 1, 0);
850
851 if (old) {
852 cancel_delayed_work(&ddata->te_timeout_work);
853
854 r = src->ops->dsi.update(src, ddata->channel, dsicm_framedone_cb,
855 ddata);
856 if (r)
857 goto err;
858 }
859
860 return IRQ_HANDLED;
861err:
862 dev_err(&ddata->pdev->dev, "start update failed\n");
863 src->ops->dsi.bus_unlock(src);
864 return IRQ_HANDLED;
865}
866
867static void dsicm_te_timeout_work_callback(struct work_struct *work)
868{
869 struct panel_drv_data *ddata = container_of(work, struct panel_drv_data,
870 te_timeout_work.work);
871 struct omap_dss_device *src = ddata->src;
872
873 dev_err(&ddata->pdev->dev, "TE not received for 250ms!\n");
874
875 atomic_set(&ddata->do_update, 0);
876 src->ops->dsi.bus_unlock(src);
877}
878
879static int dsicm_update(struct omap_dss_device *dssdev,
880 u16 x, u16 y, u16 w, u16 h)
881{
882 struct panel_drv_data *ddata = to_panel_data(dssdev);
883 struct omap_dss_device *src = ddata->src;
884 int r;
885
886 dev_dbg(&ddata->pdev->dev, "update %d, %d, %d x %d\n", x, y, w, h);
887
888 mutex_lock(&ddata->lock);
889 src->ops->dsi.bus_lock(src);
890
891 r = dsicm_wake_up(ddata);
892 if (r)
893 goto err;
894
895 if (!ddata->enabled) {
896 r = 0;
897 goto err;
898 }
899
900
901 r = dsicm_set_update_window(ddata, 0, 0, ddata->vm.hactive,
902 ddata->vm.vactive);
903 if (r)
904 goto err;
905
906 if (ddata->te_enabled && ddata->ext_te_gpio) {
907 schedule_delayed_work(&ddata->te_timeout_work,
908 msecs_to_jiffies(250));
909 atomic_set(&ddata->do_update, 1);
910 } else {
911 r = src->ops->dsi.update(src, ddata->channel, dsicm_framedone_cb,
912 ddata);
913 if (r)
914 goto err;
915 }
916
917
918 mutex_unlock(&ddata->lock);
919 return 0;
920err:
921 src->ops->dsi.bus_unlock(src);
922 mutex_unlock(&ddata->lock);
923 return r;
924}
925
926static int dsicm_sync(struct omap_dss_device *dssdev)
927{
928 struct panel_drv_data *ddata = to_panel_data(dssdev);
929 struct omap_dss_device *src = ddata->src;
930
931 dev_dbg(&ddata->pdev->dev, "sync\n");
932
933 mutex_lock(&ddata->lock);
934 src->ops->dsi.bus_lock(src);
935 src->ops->dsi.bus_unlock(src);
936 mutex_unlock(&ddata->lock);
937
938 dev_dbg(&ddata->pdev->dev, "sync done\n");
939
940 return 0;
941}
942
943static int _dsicm_enable_te(struct panel_drv_data *ddata, bool enable)
944{
945 struct omap_dss_device *src = ddata->src;
946 int r;
947
948 if (enable)
949 r = dsicm_dcs_write_1(ddata, MIPI_DCS_SET_TEAR_ON, 0);
950 else
951 r = dsicm_dcs_write_0(ddata, MIPI_DCS_SET_TEAR_OFF);
952
953 if (!ddata->ext_te_gpio)
954 src->ops->dsi.enable_te(src, enable);
955
956
957 msleep(100);
958
959 return r;
960}
961
962static int dsicm_enable_te(struct omap_dss_device *dssdev, bool enable)
963{
964 struct panel_drv_data *ddata = to_panel_data(dssdev);
965 struct omap_dss_device *src = ddata->src;
966 int r;
967
968 mutex_lock(&ddata->lock);
969
970 if (ddata->te_enabled == enable)
971 goto end;
972
973 src->ops->dsi.bus_lock(src);
974
975 if (ddata->enabled) {
976 r = dsicm_wake_up(ddata);
977 if (r)
978 goto err;
979
980 r = _dsicm_enable_te(ddata, enable);
981 if (r)
982 goto err;
983 }
984
985 ddata->te_enabled = enable;
986
987 src->ops->dsi.bus_unlock(src);
988end:
989 mutex_unlock(&ddata->lock);
990
991 return 0;
992err:
993 src->ops->dsi.bus_unlock(src);
994 mutex_unlock(&ddata->lock);
995
996 return r;
997}
998
999static int dsicm_get_te(struct omap_dss_device *dssdev)
1000{
1001 struct panel_drv_data *ddata = to_panel_data(dssdev);
1002 int r;
1003
1004 mutex_lock(&ddata->lock);
1005 r = ddata->te_enabled;
1006 mutex_unlock(&ddata->lock);
1007
1008 return r;
1009}
1010
1011static int dsicm_memory_read(struct omap_dss_device *dssdev,
1012 void *buf, size_t size,
1013 u16 x, u16 y, u16 w, u16 h)
1014{
1015 struct panel_drv_data *ddata = to_panel_data(dssdev);
1016 struct omap_dss_device *src = ddata->src;
1017 int r;
1018 int first = 1;
1019 int plen;
1020 unsigned int buf_used = 0;
1021
1022 if (size < w * h * 3)
1023 return -ENOMEM;
1024
1025 mutex_lock(&ddata->lock);
1026
1027 if (!ddata->enabled) {
1028 r = -ENODEV;
1029 goto err1;
1030 }
1031
1032 size = min((u32)w * h * 3,
1033 ddata->vm.hactive * ddata->vm.vactive * 3);
1034
1035 src->ops->dsi.bus_lock(src);
1036
1037 r = dsicm_wake_up(ddata);
1038 if (r)
1039 goto err2;
1040
1041
1042
1043
1044 if (size % 2)
1045 plen = 1;
1046 else
1047 plen = 2;
1048
1049 dsicm_set_update_window(ddata, x, y, w, h);
1050
1051 r = src->ops->dsi.set_max_rx_packet_size(src, ddata->channel, plen);
1052 if (r)
1053 goto err2;
1054
1055 while (buf_used < size) {
1056 u8 dcs_cmd = first ? 0x2e : 0x3e;
1057 first = 0;
1058
1059 r = src->ops->dsi.dcs_read(src, ddata->channel, dcs_cmd,
1060 buf + buf_used, size - buf_used);
1061
1062 if (r < 0) {
1063 dev_err(dssdev->dev, "read error\n");
1064 goto err3;
1065 }
1066
1067 buf_used += r;
1068
1069 if (r < plen) {
1070 dev_err(&ddata->pdev->dev, "short read\n");
1071 break;
1072 }
1073
1074 if (signal_pending(current)) {
1075 dev_err(&ddata->pdev->dev, "signal pending, "
1076 "aborting memory read\n");
1077 r = -ERESTARTSYS;
1078 goto err3;
1079 }
1080 }
1081
1082 r = buf_used;
1083
1084err3:
1085 src->ops->dsi.set_max_rx_packet_size(src, ddata->channel, 1);
1086err2:
1087 src->ops->dsi.bus_unlock(src);
1088err1:
1089 mutex_unlock(&ddata->lock);
1090 return r;
1091}
1092
1093static void dsicm_ulps_work(struct work_struct *work)
1094{
1095 struct panel_drv_data *ddata = container_of(work, struct panel_drv_data,
1096 ulps_work.work);
1097 struct omap_dss_device *dssdev = &ddata->dssdev;
1098 struct omap_dss_device *src = ddata->src;
1099
1100 mutex_lock(&ddata->lock);
1101
1102 if (dssdev->state != OMAP_DSS_DISPLAY_ACTIVE || !ddata->enabled) {
1103 mutex_unlock(&ddata->lock);
1104 return;
1105 }
1106
1107 src->ops->dsi.bus_lock(src);
1108
1109 dsicm_enter_ulps(ddata);
1110
1111 src->ops->dsi.bus_unlock(src);
1112 mutex_unlock(&ddata->lock);
1113}
1114
1115static int dsicm_get_modes(struct omap_dss_device *dssdev,
1116 struct drm_connector *connector)
1117{
1118 struct panel_drv_data *ddata = to_panel_data(dssdev);
1119
1120 connector->display_info.width_mm = ddata->width_mm;
1121 connector->display_info.height_mm = ddata->height_mm;
1122
1123 return omapdss_display_get_modes(connector, &ddata->vm);
1124}
1125
1126static int dsicm_check_timings(struct omap_dss_device *dssdev,
1127 struct drm_display_mode *mode)
1128{
1129 struct panel_drv_data *ddata = to_panel_data(dssdev);
1130 int ret = 0;
1131
1132 if (mode->hdisplay != ddata->vm.hactive)
1133 ret = -EINVAL;
1134
1135 if (mode->vdisplay != ddata->vm.vactive)
1136 ret = -EINVAL;
1137
1138 if (ret) {
1139 dev_warn(dssdev->dev, "wrong resolution: %d x %d",
1140 mode->hdisplay, mode->vdisplay);
1141 dev_warn(dssdev->dev, "panel resolution: %d x %d",
1142 ddata->vm.hactive, ddata->vm.vactive);
1143 }
1144
1145 return ret;
1146}
1147
1148static const struct omap_dss_device_ops dsicm_ops = {
1149 .connect = dsicm_connect,
1150 .disconnect = dsicm_disconnect,
1151
1152 .enable = dsicm_enable,
1153 .disable = dsicm_disable,
1154
1155 .get_modes = dsicm_get_modes,
1156 .check_timings = dsicm_check_timings,
1157};
1158
1159static const struct omap_dss_driver dsicm_dss_driver = {
1160 .update = dsicm_update,
1161 .sync = dsicm_sync,
1162
1163 .enable_te = dsicm_enable_te,
1164 .get_te = dsicm_get_te,
1165
1166 .memory_read = dsicm_memory_read,
1167};
1168
1169static int dsicm_probe_of(struct platform_device *pdev)
1170{
1171 struct device_node *node = pdev->dev.of_node;
1172 struct device_node *backlight;
1173 struct panel_drv_data *ddata = platform_get_drvdata(pdev);
1174 struct display_timing timing;
1175 int err;
1176
1177 ddata->reset_gpio = devm_gpiod_get(&pdev->dev, "reset", GPIOD_OUT_LOW);
1178 if (IS_ERR(ddata->reset_gpio)) {
1179 err = PTR_ERR(ddata->reset_gpio);
1180 dev_err(&pdev->dev, "reset gpio request failed: %d", err);
1181 return err;
1182 }
1183
1184 ddata->ext_te_gpio = devm_gpiod_get_optional(&pdev->dev, "te",
1185 GPIOD_IN);
1186 if (IS_ERR(ddata->ext_te_gpio)) {
1187 err = PTR_ERR(ddata->ext_te_gpio);
1188 dev_err(&pdev->dev, "TE gpio request failed: %d", err);
1189 return err;
1190 }
1191
1192 err = of_get_display_timing(node, "panel-timing", &timing);
1193 if (!err) {
1194 videomode_from_timing(&timing, &ddata->vm);
1195 if (!ddata->vm.pixelclock)
1196 ddata->vm.pixelclock =
1197 ddata->vm.hactive * ddata->vm.vactive * 60;
1198 } else {
1199 dev_warn(&pdev->dev,
1200 "failed to get video timing, using defaults\n");
1201 }
1202
1203 ddata->width_mm = 0;
1204 of_property_read_u32(node, "width-mm", &ddata->width_mm);
1205
1206 ddata->height_mm = 0;
1207 of_property_read_u32(node, "height-mm", &ddata->height_mm);
1208
1209 ddata->vpnl = devm_regulator_get_optional(&pdev->dev, "vpnl");
1210 if (IS_ERR(ddata->vpnl)) {
1211 err = PTR_ERR(ddata->vpnl);
1212 if (err == -EPROBE_DEFER)
1213 return err;
1214 ddata->vpnl = NULL;
1215 }
1216
1217 ddata->vddi = devm_regulator_get_optional(&pdev->dev, "vddi");
1218 if (IS_ERR(ddata->vddi)) {
1219 err = PTR_ERR(ddata->vddi);
1220 if (err == -EPROBE_DEFER)
1221 return err;
1222 ddata->vddi = NULL;
1223 }
1224
1225 backlight = of_parse_phandle(node, "backlight", 0);
1226 if (backlight) {
1227 ddata->extbldev = of_find_backlight_by_node(backlight);
1228 of_node_put(backlight);
1229
1230 if (!ddata->extbldev)
1231 return -EPROBE_DEFER;
1232 } else {
1233
1234 ddata->use_dsi_backlight = true;
1235 }
1236
1237
1238
1239 return 0;
1240}
1241
1242static int dsicm_probe(struct platform_device *pdev)
1243{
1244 struct panel_drv_data *ddata;
1245 struct backlight_device *bldev = NULL;
1246 struct device *dev = &pdev->dev;
1247 struct omap_dss_device *dssdev;
1248 int r;
1249
1250 dev_dbg(dev, "probe\n");
1251
1252 ddata = devm_kzalloc(dev, sizeof(*ddata), GFP_KERNEL);
1253 if (!ddata)
1254 return -ENOMEM;
1255
1256 platform_set_drvdata(pdev, ddata);
1257 ddata->pdev = pdev;
1258
1259 ddata->vm.hactive = 864;
1260 ddata->vm.vactive = 480;
1261 ddata->vm.pixelclock = 864 * 480 * 60;
1262
1263 r = dsicm_probe_of(pdev);
1264 if (r)
1265 return r;
1266
1267 dssdev = &ddata->dssdev;
1268 dssdev->dev = dev;
1269 dssdev->ops = &dsicm_ops;
1270 dssdev->driver = &dsicm_dss_driver;
1271 dssdev->type = OMAP_DISPLAY_TYPE_DSI;
1272 dssdev->display = true;
1273 dssdev->owner = THIS_MODULE;
1274 dssdev->of_ports = BIT(0);
1275 dssdev->ops_flags = OMAP_DSS_DEVICE_OP_MODES;
1276
1277 dssdev->caps = OMAP_DSS_DISPLAY_CAP_MANUAL_UPDATE |
1278 OMAP_DSS_DISPLAY_CAP_TEAR_ELIM;
1279
1280 omapdss_display_init(dssdev);
1281 omapdss_device_register(dssdev);
1282
1283 mutex_init(&ddata->lock);
1284
1285 atomic_set(&ddata->do_update, 0);
1286
1287 if (ddata->ext_te_gpio) {
1288 r = devm_request_irq(dev, gpiod_to_irq(ddata->ext_te_gpio),
1289 dsicm_te_isr,
1290 IRQF_TRIGGER_RISING,
1291 "taal vsync", ddata);
1292
1293 if (r) {
1294 dev_err(dev, "IRQ request failed\n");
1295 goto err_reg;
1296 }
1297
1298 INIT_DEFERRABLE_WORK(&ddata->te_timeout_work,
1299 dsicm_te_timeout_work_callback);
1300
1301 dev_dbg(dev, "Using GPIO TE\n");
1302 }
1303
1304 ddata->workqueue = create_singlethread_workqueue("dsicm_wq");
1305 if (!ddata->workqueue) {
1306 r = -ENOMEM;
1307 goto err_reg;
1308 }
1309 INIT_DELAYED_WORK(&ddata->ulps_work, dsicm_ulps_work);
1310
1311 dsicm_hw_reset(ddata);
1312
1313 if (ddata->use_dsi_backlight) {
1314 struct backlight_properties props = { 0 };
1315 props.max_brightness = 255;
1316 props.type = BACKLIGHT_RAW;
1317
1318 bldev = devm_backlight_device_register(dev, dev_name(dev),
1319 dev, ddata, &dsicm_bl_ops, &props);
1320 if (IS_ERR(bldev)) {
1321 r = PTR_ERR(bldev);
1322 goto err_bl;
1323 }
1324
1325 ddata->bldev = bldev;
1326 }
1327
1328 r = sysfs_create_group(&dev->kobj, &dsicm_attr_group);
1329 if (r) {
1330 dev_err(dev, "failed to create sysfs files\n");
1331 goto err_bl;
1332 }
1333
1334 return 0;
1335
1336err_bl:
1337 destroy_workqueue(ddata->workqueue);
1338err_reg:
1339 if (ddata->extbldev)
1340 put_device(&ddata->extbldev->dev);
1341
1342 return r;
1343}
1344
1345static int __exit dsicm_remove(struct platform_device *pdev)
1346{
1347 struct panel_drv_data *ddata = platform_get_drvdata(pdev);
1348 struct omap_dss_device *dssdev = &ddata->dssdev;
1349
1350 dev_dbg(&pdev->dev, "remove\n");
1351
1352 omapdss_device_unregister(dssdev);
1353
1354 if (omapdss_device_is_enabled(dssdev))
1355 dsicm_disable(dssdev);
1356 omapdss_device_disconnect(ddata->src, dssdev);
1357
1358 sysfs_remove_group(&pdev->dev.kobj, &dsicm_attr_group);
1359
1360 if (ddata->extbldev)
1361 put_device(&ddata->extbldev->dev);
1362
1363 dsicm_cancel_ulps_work(ddata);
1364 destroy_workqueue(ddata->workqueue);
1365
1366
1367 dsicm_hw_reset(ddata);
1368
1369 return 0;
1370}
1371
1372static const struct of_device_id dsicm_of_match[] = {
1373 { .compatible = "omapdss,panel-dsi-cm", },
1374 {},
1375};
1376
1377MODULE_DEVICE_TABLE(of, dsicm_of_match);
1378
1379static struct platform_driver dsicm_driver = {
1380 .probe = dsicm_probe,
1381 .remove = __exit_p(dsicm_remove),
1382 .driver = {
1383 .name = "panel-dsi-cm",
1384 .of_match_table = dsicm_of_match,
1385 .suppress_bind_attrs = true,
1386 },
1387};
1388
1389module_platform_driver(dsicm_driver);
1390
1391MODULE_AUTHOR("Tomi Valkeinen <tomi.valkeinen@ti.com>");
1392MODULE_DESCRIPTION("Generic DSI Command Mode Panel Driver");
1393MODULE_LICENSE("GPL");
1394
