2 * Taal DSI command mode panel
4 * Copyright (C) 2009 Nokia Corporation
5 * Author: Tomi Valkeinen <tomi.valkeinen@nokia.com>
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.
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
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/>.
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>
29 #include <linux/interrupt.h>
30 #include <linux/gpio.h>
31 #include <linux/completion.h>
32 #include <linux/workqueue.h>
33 #include <linux/slab.h>
34 #include <linux/mutex.h>
36 #include <plat/display.h>
38 /* DSI Virtual channel. Hardcoded for now. */
41 #define DCS_READ_NUM_ERRORS 0x05
42 #define DCS_READ_POWER_MODE 0x0a
43 #define DCS_READ_MADCTL 0x0b
44 #define DCS_READ_PIXEL_FORMAT 0x0c
45 #define DCS_RDDSDR 0x0f
46 #define DCS_SLEEP_IN 0x10
47 #define DCS_SLEEP_OUT 0x11
48 #define DCS_DISPLAY_OFF 0x28
49 #define DCS_DISPLAY_ON 0x29
50 #define DCS_COLUMN_ADDR 0x2a
51 #define DCS_PAGE_ADDR 0x2b
52 #define DCS_MEMORY_WRITE 0x2c
53 #define DCS_TEAR_OFF 0x34
54 #define DCS_TEAR_ON 0x35
55 #define DCS_MEM_ACC_CTRL 0x36
56 #define DCS_PIXEL_FORMAT 0x3a
57 #define DCS_BRIGHTNESS 0x51
58 #define DCS_CTRL_DISPLAY 0x53
59 #define DCS_WRITE_CABC 0x55
60 #define DCS_READ_CABC 0x56
61 #define DCS_GET_ID1 0xda
62 #define DCS_GET_ID2 0xdb
63 #define DCS_GET_ID3 0xdc
65 /* #define TAAL_USE_ESD_CHECK */
66 #define TAAL_ESD_CHECK_PERIOD msecs_to_jiffies(5000)
68 static int _taal_enable_te(struct omap_dss_device *dssdev, bool enable);
73 struct backlight_device *bldev;
75 unsigned long hw_guard_end; /* next value of jiffies when we can
76 * issue the next sleep in/out command
78 unsigned long hw_guard_wait; /* max guard time in jiffies */
80 struct omap_dss_device *dssdev;
88 struct completion te_completion;
97 struct workqueue_struct *esd_wq;
98 struct delayed_work esd_work;
101 static void taal_esd_work(struct work_struct *work);
103 static void hw_guard_start(struct taal_data *td, int guard_msec)
105 td->hw_guard_wait = msecs_to_jiffies(guard_msec);
106 td->hw_guard_end = jiffies + td->hw_guard_wait;
109 static void hw_guard_wait(struct taal_data *td)
111 unsigned long wait = td->hw_guard_end - jiffies;
113 if ((long)wait > 0 && wait <= td->hw_guard_wait) {
114 set_current_state(TASK_UNINTERRUPTIBLE);
115 schedule_timeout(wait);
119 static int taal_dcs_read_1(u8 dcs_cmd, u8 *data)
124 r = dsi_vc_dcs_read(TCH, dcs_cmd, buf, 1);
134 static int taal_dcs_write_0(u8 dcs_cmd)
136 return dsi_vc_dcs_write(TCH, &dcs_cmd, 1);
139 static int taal_dcs_write_1(u8 dcs_cmd, u8 param)
144 return dsi_vc_dcs_write(TCH, buf, 2);
147 static int taal_sleep_in(struct taal_data *td)
156 r = dsi_vc_dcs_write_nosync(TCH, &cmd, 1);
160 hw_guard_start(td, 120);
167 static int taal_sleep_out(struct taal_data *td)
173 r = taal_dcs_write_0(DCS_SLEEP_OUT);
177 hw_guard_start(td, 120);
184 static int taal_get_id(u8 *id1, u8 *id2, u8 *id3)
188 r = taal_dcs_read_1(DCS_GET_ID1, id1);
191 r = taal_dcs_read_1(DCS_GET_ID2, id2);
194 r = taal_dcs_read_1(DCS_GET_ID3, id3);
201 static int taal_set_addr_mode(u8 rotate, bool mirror)
207 r = taal_dcs_read_1(DCS_READ_MADCTL, &mode);
238 mode &= ~((1<<7) | (1<<6) | (1<<5));
239 mode |= (b7 << 7) | (b6 << 6) | (b5 << 5);
241 return taal_dcs_write_1(DCS_MEM_ACC_CTRL, mode);
244 static int taal_set_update_window(u16 x, u16 y, u16 w, u16 h)
253 buf[0] = DCS_COLUMN_ADDR;
254 buf[1] = (x1 >> 8) & 0xff;
255 buf[2] = (x1 >> 0) & 0xff;
256 buf[3] = (x2 >> 8) & 0xff;
257 buf[4] = (x2 >> 0) & 0xff;
259 r = dsi_vc_dcs_write_nosync(TCH, buf, sizeof(buf));
263 buf[0] = DCS_PAGE_ADDR;
264 buf[1] = (y1 >> 8) & 0xff;
265 buf[2] = (y1 >> 0) & 0xff;
266 buf[3] = (y2 >> 8) & 0xff;
267 buf[4] = (y2 >> 0) & 0xff;
269 r = dsi_vc_dcs_write_nosync(TCH, buf, sizeof(buf));
273 dsi_vc_send_bta_sync(TCH);
278 static int taal_bl_update_status(struct backlight_device *dev)
280 struct omap_dss_device *dssdev = dev_get_drvdata(&dev->dev);
281 struct taal_data *td = dev_get_drvdata(&dssdev->dev);
285 if (dev->props.fb_blank == FB_BLANK_UNBLANK &&
286 dev->props.power == FB_BLANK_UNBLANK)
287 level = dev->props.brightness;
291 dev_dbg(&dssdev->dev, "update brightness to %d\n", level);
293 mutex_lock(&td->lock);
295 if (td->use_dsi_bl) {
298 r = taal_dcs_write_1(DCS_BRIGHTNESS, level);
304 if (!dssdev->set_backlight)
307 r = dssdev->set_backlight(dssdev, level);
310 mutex_unlock(&td->lock);
315 static int taal_bl_get_intensity(struct backlight_device *dev)
317 if (dev->props.fb_blank == FB_BLANK_UNBLANK &&
318 dev->props.power == FB_BLANK_UNBLANK)
319 return dev->props.brightness;
324 static struct backlight_ops taal_bl_ops = {
325 .get_brightness = taal_bl_get_intensity,
326 .update_status = taal_bl_update_status,
329 static void taal_get_timings(struct omap_dss_device *dssdev,
330 struct omap_video_timings *timings)
332 *timings = dssdev->panel.timings;
335 static void taal_get_resolution(struct omap_dss_device *dssdev,
336 u16 *xres, u16 *yres)
338 struct taal_data *td = dev_get_drvdata(&dssdev->dev);
340 if (td->rotate == 0 || td->rotate == 2) {
341 *xres = dssdev->panel.timings.x_res;
342 *yres = dssdev->panel.timings.y_res;
344 *yres = dssdev->panel.timings.x_res;
345 *xres = dssdev->panel.timings.y_res;
349 static irqreturn_t taal_te_isr(int irq, void *data)
351 struct omap_dss_device *dssdev = data;
352 struct taal_data *td = dev_get_drvdata(&dssdev->dev);
354 complete_all(&td->te_completion);
359 static ssize_t taal_num_errors_show(struct device *dev,
360 struct device_attribute *attr, char *buf)
362 struct omap_dss_device *dssdev = to_dss_device(dev);
363 struct taal_data *td = dev_get_drvdata(&dssdev->dev);
367 mutex_lock(&td->lock);
371 r = taal_dcs_read_1(DCS_READ_NUM_ERRORS, &errors);
377 mutex_unlock(&td->lock);
382 return snprintf(buf, PAGE_SIZE, "%d\n", errors);
385 static ssize_t taal_hw_revision_show(struct device *dev,
386 struct device_attribute *attr, char *buf)
388 struct omap_dss_device *dssdev = to_dss_device(dev);
389 struct taal_data *td = dev_get_drvdata(&dssdev->dev);
393 mutex_lock(&td->lock);
397 r = taal_get_id(&id1, &id2, &id3);
403 mutex_unlock(&td->lock);
408 return snprintf(buf, PAGE_SIZE, "%02x.%02x.%02x\n", id1, id2, id3);
411 static const char *cabc_modes[] = {
412 "off", /* used also always when CABC is not supported */
418 static ssize_t show_cabc_mode(struct device *dev,
419 struct device_attribute *attr,
422 struct omap_dss_device *dssdev = to_dss_device(dev);
423 struct taal_data *td = dev_get_drvdata(&dssdev->dev);
424 const char *mode_str;
428 mode = td->cabc_mode;
430 mode_str = "unknown";
431 if (mode >= 0 && mode < ARRAY_SIZE(cabc_modes))
432 mode_str = cabc_modes[mode];
433 len = snprintf(buf, PAGE_SIZE, "%s\n", mode_str);
435 return len < PAGE_SIZE - 1 ? len : PAGE_SIZE - 1;
438 static ssize_t store_cabc_mode(struct device *dev,
439 struct device_attribute *attr,
440 const char *buf, size_t count)
442 struct omap_dss_device *dssdev = to_dss_device(dev);
443 struct taal_data *td = dev_get_drvdata(&dssdev->dev);
446 for (i = 0; i < ARRAY_SIZE(cabc_modes); i++) {
447 if (sysfs_streq(cabc_modes[i], buf))
451 if (i == ARRAY_SIZE(cabc_modes))
454 mutex_lock(&td->lock);
458 if (!td->cabc_broken)
459 taal_dcs_write_1(DCS_WRITE_CABC, i);
465 mutex_unlock(&td->lock);
470 static ssize_t show_cabc_available_modes(struct device *dev,
471 struct device_attribute *attr,
478 len < PAGE_SIZE && i < ARRAY_SIZE(cabc_modes); i++)
479 len += snprintf(&buf[len], PAGE_SIZE - len, "%s%s%s",
480 i ? " " : "", cabc_modes[i],
481 i == ARRAY_SIZE(cabc_modes) - 1 ? "\n" : "");
483 return len < PAGE_SIZE ? len : PAGE_SIZE - 1;
486 static DEVICE_ATTR(num_dsi_errors, S_IRUGO, taal_num_errors_show, NULL);
487 static DEVICE_ATTR(hw_revision, S_IRUGO, taal_hw_revision_show, NULL);
488 static DEVICE_ATTR(cabc_mode, S_IRUGO | S_IWUSR,
489 show_cabc_mode, store_cabc_mode);
490 static DEVICE_ATTR(cabc_available_modes, S_IRUGO,
491 show_cabc_available_modes, NULL);
493 static struct attribute *taal_attrs[] = {
494 &dev_attr_num_dsi_errors.attr,
495 &dev_attr_hw_revision.attr,
496 &dev_attr_cabc_mode.attr,
497 &dev_attr_cabc_available_modes.attr,
501 static struct attribute_group taal_attr_group = {
505 static void taal_hw_reset(struct omap_dss_device *dssdev)
507 if (dssdev->reset_gpio == -1)
510 gpio_set_value(dssdev->reset_gpio, 1);
512 /* reset the panel */
513 gpio_set_value(dssdev->reset_gpio, 0);
514 /* assert reset for at least 10us */
516 gpio_set_value(dssdev->reset_gpio, 1);
517 /* wait 5ms after releasing reset */
521 static int taal_probe(struct omap_dss_device *dssdev)
523 struct backlight_properties props;
524 struct taal_data *td;
525 struct backlight_device *bldev;
528 const struct omap_video_timings taal_panel_timings = {
533 dev_dbg(&dssdev->dev, "probe\n");
535 dssdev->panel.config = OMAP_DSS_LCD_TFT;
536 dssdev->panel.timings = taal_panel_timings;
537 dssdev->ctrl.pixel_size = 24;
539 td = kzalloc(sizeof(*td), GFP_KERNEL);
546 mutex_init(&td->lock);
548 td->esd_wq = create_singlethread_workqueue("taal_esd");
549 if (td->esd_wq == NULL) {
550 dev_err(&dssdev->dev, "can't create ESD workqueue\n");
554 INIT_DELAYED_WORK_DEFERRABLE(&td->esd_work, taal_esd_work);
556 dev_set_drvdata(&dssdev->dev, td);
558 taal_hw_reset(dssdev);
560 /* if no platform set_backlight() defined, presume DSI backlight
562 memset(&props, 0, sizeof(struct backlight_properties));
563 if (!dssdev->set_backlight)
564 td->use_dsi_bl = true;
567 props.max_brightness = 255;
569 props.max_brightness = 127;
570 bldev = backlight_device_register("taal", &dssdev->dev, dssdev,
571 &taal_bl_ops, &props);
579 bldev->props.fb_blank = FB_BLANK_UNBLANK;
580 bldev->props.power = FB_BLANK_UNBLANK;
582 bldev->props.brightness = 255;
584 bldev->props.brightness = 127;
586 taal_bl_update_status(bldev);
588 if (dssdev->phy.dsi.ext_te) {
589 int gpio = dssdev->phy.dsi.ext_te_gpio;
591 r = gpio_request(gpio, "taal irq");
593 dev_err(&dssdev->dev, "GPIO request failed\n");
597 gpio_direction_input(gpio);
599 r = request_irq(gpio_to_irq(gpio), taal_te_isr,
600 IRQF_DISABLED | IRQF_TRIGGER_RISING,
601 "taal vsync", dssdev);
604 dev_err(&dssdev->dev, "IRQ request failed\n");
609 init_completion(&td->te_completion);
611 td->use_ext_te = true;
614 r = sysfs_create_group(&dssdev->dev.kobj, &taal_attr_group);
616 dev_err(&dssdev->dev, "failed to create sysfs files\n");
622 if (td->use_ext_te) {
623 int gpio = dssdev->phy.dsi.ext_te_gpio;
624 free_irq(gpio_to_irq(gpio), dssdev);
628 backlight_device_unregister(bldev);
630 cancel_delayed_work_sync(&td->esd_work);
631 destroy_workqueue(td->esd_wq);
638 static void taal_remove(struct omap_dss_device *dssdev)
640 struct taal_data *td = dev_get_drvdata(&dssdev->dev);
641 struct backlight_device *bldev;
643 dev_dbg(&dssdev->dev, "remove\n");
645 sysfs_remove_group(&dssdev->dev.kobj, &taal_attr_group);
647 if (td->use_ext_te) {
648 int gpio = dssdev->phy.dsi.ext_te_gpio;
649 free_irq(gpio_to_irq(gpio), dssdev);
654 bldev->props.power = FB_BLANK_POWERDOWN;
655 taal_bl_update_status(bldev);
656 backlight_device_unregister(bldev);
658 cancel_delayed_work_sync(&td->esd_work);
659 destroy_workqueue(td->esd_wq);
661 /* reset, to be sure that the panel is in a valid state */
662 taal_hw_reset(dssdev);
667 static int taal_power_on(struct omap_dss_device *dssdev)
669 struct taal_data *td = dev_get_drvdata(&dssdev->dev);
673 /* it seems we have to wait a bit until taal is ready */
678 r = omapdss_dsi_display_enable(dssdev);
680 dev_err(&dssdev->dev, "failed to enable DSI\n");
684 taal_hw_reset(dssdev);
686 omapdss_dsi_vc_enable_hs(TCH, false);
688 r = taal_sleep_out(td);
692 r = taal_get_id(&id1, &id2, &id3);
696 /* on early revisions CABC is broken */
697 if (id2 == 0x00 || id2 == 0xff || id2 == 0x81)
698 td->cabc_broken = true;
700 taal_dcs_write_1(DCS_BRIGHTNESS, 0xff);
701 taal_dcs_write_1(DCS_CTRL_DISPLAY, (1<<2) | (1<<5)); /* BL | BCTRL */
703 taal_dcs_write_1(DCS_PIXEL_FORMAT, 0x7); /* 24bit/pixel */
705 taal_set_addr_mode(td->rotate, td->mirror);
706 if (!td->cabc_broken)
707 taal_dcs_write_1(DCS_WRITE_CABC, td->cabc_mode);
709 taal_dcs_write_0(DCS_DISPLAY_ON);
711 r = _taal_enable_te(dssdev, td->te_enabled);
715 #ifdef TAAL_USE_ESD_CHECK
716 queue_delayed_work(td->esd_wq, &td->esd_work, TAAL_ESD_CHECK_PERIOD);
721 if (!td->intro_printed) {
722 dev_info(&dssdev->dev, "revision %02x.%02x.%02x\n",
725 dev_info(&dssdev->dev,
726 "old Taal version, CABC disabled\n");
727 td->intro_printed = true;
730 omapdss_dsi_vc_enable_hs(TCH, true);
736 dev_err(&dssdev->dev, "error while enabling panel, issuing HW reset\n");
738 taal_hw_reset(dssdev);
740 omapdss_dsi_display_disable(dssdev);
747 static void taal_power_off(struct omap_dss_device *dssdev)
749 struct taal_data *td = dev_get_drvdata(&dssdev->dev);
754 cancel_delayed_work(&td->esd_work);
756 r = taal_dcs_write_0(DCS_DISPLAY_OFF);
758 r = taal_sleep_in(td);
759 /* wait a bit so that the message goes through */
764 dev_err(&dssdev->dev,
765 "error disabling panel, issuing HW reset\n");
766 taal_hw_reset(dssdev);
769 omapdss_dsi_display_disable(dssdev);
776 static int taal_enable(struct omap_dss_device *dssdev)
778 struct taal_data *td = dev_get_drvdata(&dssdev->dev);
781 dev_dbg(&dssdev->dev, "enable\n");
783 mutex_lock(&td->lock);
785 if (dssdev->state != OMAP_DSS_DISPLAY_DISABLED) {
790 r = taal_power_on(dssdev);
794 dssdev->state = OMAP_DSS_DISPLAY_ACTIVE;
796 mutex_unlock(&td->lock);
800 dev_dbg(&dssdev->dev, "enable failed\n");
801 mutex_unlock(&td->lock);
805 static void taal_disable(struct omap_dss_device *dssdev)
807 struct taal_data *td = dev_get_drvdata(&dssdev->dev);
809 dev_dbg(&dssdev->dev, "disable\n");
811 mutex_lock(&td->lock);
813 if (dssdev->state == OMAP_DSS_DISPLAY_ACTIVE)
814 taal_power_off(dssdev);
816 dssdev->state = OMAP_DSS_DISPLAY_DISABLED;
818 mutex_unlock(&td->lock);
821 static int taal_suspend(struct omap_dss_device *dssdev)
823 struct taal_data *td = dev_get_drvdata(&dssdev->dev);
826 dev_dbg(&dssdev->dev, "suspend\n");
828 mutex_lock(&td->lock);
830 if (dssdev->state != OMAP_DSS_DISPLAY_ACTIVE) {
835 taal_power_off(dssdev);
836 dssdev->state = OMAP_DSS_DISPLAY_SUSPENDED;
838 mutex_unlock(&td->lock);
842 mutex_unlock(&td->lock);
846 static int taal_resume(struct omap_dss_device *dssdev)
848 struct taal_data *td = dev_get_drvdata(&dssdev->dev);
851 dev_dbg(&dssdev->dev, "resume\n");
853 mutex_lock(&td->lock);
855 if (dssdev->state != OMAP_DSS_DISPLAY_SUSPENDED) {
860 r = taal_power_on(dssdev);
861 dssdev->state = OMAP_DSS_DISPLAY_ACTIVE;
863 mutex_unlock(&td->lock);
867 mutex_unlock(&td->lock);
871 static void taal_framedone_cb(int err, void *data)
873 struct omap_dss_device *dssdev = data;
874 dev_dbg(&dssdev->dev, "framedone, err %d\n", err);
878 static int taal_update(struct omap_dss_device *dssdev,
879 u16 x, u16 y, u16 w, u16 h)
881 struct taal_data *td = dev_get_drvdata(&dssdev->dev);
884 dev_dbg(&dssdev->dev, "update %d, %d, %d x %d\n", x, y, w, h);
886 mutex_lock(&td->lock);
894 r = omap_dsi_prepare_update(dssdev, &x, &y, &w, &h);
898 r = taal_set_update_window(x, y, w, h);
902 r = omap_dsi_update(dssdev, TCH, x, y, w, h,
903 taal_framedone_cb, dssdev);
907 /* note: no bus_unlock here. unlock is in framedone_cb */
908 mutex_unlock(&td->lock);
912 mutex_unlock(&td->lock);
916 static int taal_sync(struct omap_dss_device *dssdev)
918 struct taal_data *td = dev_get_drvdata(&dssdev->dev);
920 dev_dbg(&dssdev->dev, "sync\n");
922 mutex_lock(&td->lock);
925 mutex_unlock(&td->lock);
927 dev_dbg(&dssdev->dev, "sync done\n");
932 static int _taal_enable_te(struct omap_dss_device *dssdev, bool enable)
934 struct taal_data *td = dev_get_drvdata(&dssdev->dev);
937 td->te_enabled = enable;
940 r = taal_dcs_write_1(DCS_TEAR_ON, 0);
942 r = taal_dcs_write_0(DCS_TEAR_OFF);
944 omapdss_dsi_enable_te(dssdev, enable);
946 /* XXX for some reason, DSI TE breaks if we don't wait here.
947 * Panel bug? Needs more studying */
953 static int taal_enable_te(struct omap_dss_device *dssdev, bool enable)
955 struct taal_data *td = dev_get_drvdata(&dssdev->dev);
958 mutex_lock(&td->lock);
961 r = _taal_enable_te(dssdev, enable);
964 mutex_unlock(&td->lock);
969 static int taal_get_te(struct omap_dss_device *dssdev)
971 struct taal_data *td = dev_get_drvdata(&dssdev->dev);
974 mutex_lock(&td->lock);
976 mutex_unlock(&td->lock);
981 static int taal_rotate(struct omap_dss_device *dssdev, u8 rotate)
983 struct taal_data *td = dev_get_drvdata(&dssdev->dev);
986 dev_dbg(&dssdev->dev, "rotate %d\n", rotate);
988 mutex_lock(&td->lock);
992 r = taal_set_addr_mode(rotate, td->mirror);
1000 mutex_unlock(&td->lock);
1004 mutex_unlock(&td->lock);
1008 static u8 taal_get_rotate(struct omap_dss_device *dssdev)
1010 struct taal_data *td = dev_get_drvdata(&dssdev->dev);
1013 mutex_lock(&td->lock);
1015 mutex_unlock(&td->lock);
1020 static int taal_mirror(struct omap_dss_device *dssdev, bool enable)
1022 struct taal_data *td = dev_get_drvdata(&dssdev->dev);
1025 dev_dbg(&dssdev->dev, "mirror %d\n", enable);
1027 mutex_lock(&td->lock);
1030 r = taal_set_addr_mode(td->rotate, enable);
1035 td->mirror = enable;
1038 mutex_unlock(&td->lock);
1042 mutex_unlock(&td->lock);
1046 static bool taal_get_mirror(struct omap_dss_device *dssdev)
1048 struct taal_data *td = dev_get_drvdata(&dssdev->dev);
1051 mutex_lock(&td->lock);
1053 mutex_unlock(&td->lock);
1058 static int taal_run_test(struct omap_dss_device *dssdev, int test_num)
1060 struct taal_data *td = dev_get_drvdata(&dssdev->dev);
1064 mutex_lock(&td->lock);
1067 r = taal_dcs_read_1(DCS_GET_ID1, &id1);
1070 r = taal_dcs_read_1(DCS_GET_ID2, &id2);
1073 r = taal_dcs_read_1(DCS_GET_ID3, &id3);
1078 mutex_unlock(&td->lock);
1082 mutex_unlock(&td->lock);
1086 static int taal_memory_read(struct omap_dss_device *dssdev,
1087 void *buf, size_t size,
1088 u16 x, u16 y, u16 w, u16 h)
1093 unsigned buf_used = 0;
1094 struct taal_data *td = dev_get_drvdata(&dssdev->dev);
1096 if (size < w * h * 3)
1099 mutex_lock(&td->lock);
1106 size = min(w * h * 3,
1107 dssdev->panel.timings.x_res *
1108 dssdev->panel.timings.y_res * 3);
1112 /* plen 1 or 2 goes into short packet. until checksum error is fixed,
1113 * use short packets. plen 32 works, but bigger packets seem to cause
1120 taal_set_update_window(x, y, w, h);
1122 r = dsi_vc_set_max_rx_packet_size(TCH, plen);
1126 while (buf_used < size) {
1127 u8 dcs_cmd = first ? 0x2e : 0x3e;
1130 r = dsi_vc_dcs_read(TCH, dcs_cmd,
1131 buf + buf_used, size - buf_used);
1134 dev_err(&dssdev->dev, "read error\n");
1141 dev_err(&dssdev->dev, "short read\n");
1145 if (signal_pending(current)) {
1146 dev_err(&dssdev->dev, "signal pending, "
1147 "aborting memory read\n");
1156 dsi_vc_set_max_rx_packet_size(TCH, 1);
1160 mutex_unlock(&td->lock);
1164 static void taal_esd_work(struct work_struct *work)
1166 struct taal_data *td = container_of(work, struct taal_data,
1168 struct omap_dss_device *dssdev = td->dssdev;
1172 mutex_lock(&td->lock);
1175 mutex_unlock(&td->lock);
1181 r = taal_dcs_read_1(DCS_RDDSDR, &state1);
1183 dev_err(&dssdev->dev, "failed to read Taal status\n");
1187 /* Run self diagnostics */
1188 r = taal_sleep_out(td);
1190 dev_err(&dssdev->dev, "failed to run Taal self-diagnostics\n");
1194 r = taal_dcs_read_1(DCS_RDDSDR, &state2);
1196 dev_err(&dssdev->dev, "failed to read Taal status\n");
1200 /* Each sleep out command will trigger a self diagnostic and flip
1201 * Bit6 if the test passes.
1203 if (!((state1 ^ state2) & (1 << 6))) {
1204 dev_err(&dssdev->dev, "LCD self diagnostics failed\n");
1207 /* Self-diagnostics result is also shown on TE GPIO line. We need
1208 * to re-enable TE after self diagnostics */
1209 if (td->use_ext_te && td->te_enabled) {
1210 r = taal_dcs_write_1(DCS_TEAR_ON, 0);
1217 queue_delayed_work(td->esd_wq, &td->esd_work, TAAL_ESD_CHECK_PERIOD);
1219 mutex_unlock(&td->lock);
1222 dev_err(&dssdev->dev, "performing LCD reset\n");
1224 taal_power_off(dssdev);
1225 taal_hw_reset(dssdev);
1226 taal_power_on(dssdev);
1230 queue_delayed_work(td->esd_wq, &td->esd_work, TAAL_ESD_CHECK_PERIOD);
1232 mutex_unlock(&td->lock);
1235 static int taal_set_update_mode(struct omap_dss_device *dssdev,
1236 enum omap_dss_update_mode mode)
1238 if (mode != OMAP_DSS_UPDATE_MANUAL)
1243 static enum omap_dss_update_mode taal_get_update_mode(
1244 struct omap_dss_device *dssdev)
1246 return OMAP_DSS_UPDATE_MANUAL;
1249 static struct omap_dss_driver taal_driver = {
1250 .probe = taal_probe,
1251 .remove = taal_remove,
1253 .enable = taal_enable,
1254 .disable = taal_disable,
1255 .suspend = taal_suspend,
1256 .resume = taal_resume,
1258 .set_update_mode = taal_set_update_mode,
1259 .get_update_mode = taal_get_update_mode,
1261 .update = taal_update,
1264 .get_resolution = taal_get_resolution,
1265 .get_recommended_bpp = omapdss_default_get_recommended_bpp,
1267 .enable_te = taal_enable_te,
1268 .get_te = taal_get_te,
1270 .set_rotate = taal_rotate,
1271 .get_rotate = taal_get_rotate,
1272 .set_mirror = taal_mirror,
1273 .get_mirror = taal_get_mirror,
1274 .run_test = taal_run_test,
1275 .memory_read = taal_memory_read,
1277 .get_timings = taal_get_timings,
1281 .owner = THIS_MODULE,
1285 static int __init taal_init(void)
1287 omap_dss_register_driver(&taal_driver);
1292 static void __exit taal_exit(void)
1294 omap_dss_unregister_driver(&taal_driver);
1297 module_init(taal_init);
1298 module_exit(taal_exit);
1300 MODULE_AUTHOR("Tomi Valkeinen <tomi.valkeinen@nokia.com>");
1301 MODULE_DESCRIPTION("Taal Driver");
1302 MODULE_LICENSE("GPL");