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/workqueue.h>
32 #include <linux/slab.h>
33 #include <linux/mutex.h>
35 #include <video/omapdss.h>
36 #include <video/omap-panel-nokia-dsi.h>
37 #include <video/mipi_display.h>
39 /* DSI Virtual channel. Hardcoded for now. */
42 #define DCS_READ_NUM_ERRORS 0x05
43 #define DCS_BRIGHTNESS 0x51
44 #define DCS_CTRL_DISPLAY 0x53
45 #define DCS_WRITE_CABC 0x55
46 #define DCS_READ_CABC 0x56
47 #define DCS_GET_ID1 0xda
48 #define DCS_GET_ID2 0xdb
49 #define DCS_GET_ID3 0xdc
51 static irqreturn_t taal_te_isr(int irq, void *data);
52 static void taal_te_timeout_work_callback(struct work_struct *work);
53 static int _taal_enable_te(struct omap_dss_device *dssdev, bool enable);
55 static int taal_panel_reset(struct omap_dss_device *dssdev);
58 * struct panel_config - panel configuration
61 * @timings: panel resolution
62 * @sleep: various panel specific delays, passed to msleep() if non-zero
63 * @reset_sequence: reset sequence timings, passed to udelay() if non-zero
64 * @regulators: array of panel regulators
65 * @num_regulators: number of regulators in the array
71 struct omap_video_timings timings;
74 unsigned int sleep_in;
75 unsigned int sleep_out;
76 unsigned int hw_reset;
77 unsigned int enable_te;
91 static struct panel_config panel_configs[] = {
103 .enable_te = 100, /* possible panel bug */
115 struct backlight_device *bldev;
117 unsigned long hw_guard_end; /* next value of jiffies when we can
118 * issue the next sleep in/out command
120 unsigned long hw_guard_wait; /* max guard time in jiffies */
122 struct omap_dss_device *dssdev;
133 struct delayed_work te_timeout_work;
140 struct workqueue_struct *workqueue;
142 struct delayed_work esd_work;
143 unsigned esd_interval;
146 unsigned ulps_timeout;
147 struct delayed_work ulps_work;
149 struct panel_config *panel_config;
152 static inline struct nokia_dsi_panel_data
153 *get_panel_data(const struct omap_dss_device *dssdev)
155 return (struct nokia_dsi_panel_data *) dssdev->data;
158 static void taal_esd_work(struct work_struct *work);
159 static void taal_ulps_work(struct work_struct *work);
161 static void hw_guard_start(struct taal_data *td, int guard_msec)
163 td->hw_guard_wait = msecs_to_jiffies(guard_msec);
164 td->hw_guard_end = jiffies + td->hw_guard_wait;
167 static void hw_guard_wait(struct taal_data *td)
169 unsigned long wait = td->hw_guard_end - jiffies;
171 if ((long)wait > 0 && wait <= td->hw_guard_wait) {
172 set_current_state(TASK_UNINTERRUPTIBLE);
173 schedule_timeout(wait);
177 static int taal_dcs_read_1(struct taal_data *td, u8 dcs_cmd, u8 *data)
182 r = dsi_vc_dcs_read(td->dssdev, td->channel, dcs_cmd, buf, 1);
192 static int taal_dcs_write_0(struct taal_data *td, u8 dcs_cmd)
194 return dsi_vc_dcs_write(td->dssdev, td->channel, &dcs_cmd, 1);
197 static int taal_dcs_write_1(struct taal_data *td, u8 dcs_cmd, u8 param)
202 return dsi_vc_dcs_write(td->dssdev, td->channel, buf, 2);
205 static int taal_sleep_in(struct taal_data *td)
213 cmd = MIPI_DCS_ENTER_SLEEP_MODE;
214 r = dsi_vc_dcs_write_nosync(td->dssdev, td->channel, &cmd, 1);
218 hw_guard_start(td, 120);
220 if (td->panel_config->sleep.sleep_in)
221 msleep(td->panel_config->sleep.sleep_in);
226 static int taal_sleep_out(struct taal_data *td)
232 r = taal_dcs_write_0(td, MIPI_DCS_EXIT_SLEEP_MODE);
236 hw_guard_start(td, 120);
238 if (td->panel_config->sleep.sleep_out)
239 msleep(td->panel_config->sleep.sleep_out);
244 static int taal_get_id(struct taal_data *td, u8 *id1, u8 *id2, u8 *id3)
248 r = taal_dcs_read_1(td, DCS_GET_ID1, id1);
251 r = taal_dcs_read_1(td, DCS_GET_ID2, id2);
254 r = taal_dcs_read_1(td, DCS_GET_ID3, id3);
261 static int taal_set_addr_mode(struct taal_data *td, u8 rotate, bool mirror)
267 r = taal_dcs_read_1(td, MIPI_DCS_GET_ADDRESS_MODE, &mode);
298 mode &= ~((1<<7) | (1<<6) | (1<<5));
299 mode |= (b7 << 7) | (b6 << 6) | (b5 << 5);
301 return taal_dcs_write_1(td, MIPI_DCS_SET_ADDRESS_MODE, mode);
304 static int taal_set_update_window(struct taal_data *td,
305 u16 x, u16 y, u16 w, u16 h)
314 buf[0] = MIPI_DCS_SET_COLUMN_ADDRESS;
315 buf[1] = (x1 >> 8) & 0xff;
316 buf[2] = (x1 >> 0) & 0xff;
317 buf[3] = (x2 >> 8) & 0xff;
318 buf[4] = (x2 >> 0) & 0xff;
320 r = dsi_vc_dcs_write_nosync(td->dssdev, td->channel, buf, sizeof(buf));
324 buf[0] = MIPI_DCS_SET_PAGE_ADDRESS;
325 buf[1] = (y1 >> 8) & 0xff;
326 buf[2] = (y1 >> 0) & 0xff;
327 buf[3] = (y2 >> 8) & 0xff;
328 buf[4] = (y2 >> 0) & 0xff;
330 r = dsi_vc_dcs_write_nosync(td->dssdev, td->channel, buf, sizeof(buf));
334 dsi_vc_send_bta_sync(td->dssdev, td->channel);
339 static void taal_queue_esd_work(struct omap_dss_device *dssdev)
341 struct taal_data *td = dev_get_drvdata(&dssdev->dev);
343 if (td->esd_interval > 0)
344 queue_delayed_work(td->workqueue, &td->esd_work,
345 msecs_to_jiffies(td->esd_interval));
348 static void taal_cancel_esd_work(struct omap_dss_device *dssdev)
350 struct taal_data *td = dev_get_drvdata(&dssdev->dev);
352 cancel_delayed_work(&td->esd_work);
355 static void taal_queue_ulps_work(struct omap_dss_device *dssdev)
357 struct taal_data *td = dev_get_drvdata(&dssdev->dev);
359 if (td->ulps_timeout > 0)
360 queue_delayed_work(td->workqueue, &td->ulps_work,
361 msecs_to_jiffies(td->ulps_timeout));
364 static void taal_cancel_ulps_work(struct omap_dss_device *dssdev)
366 struct taal_data *td = dev_get_drvdata(&dssdev->dev);
368 cancel_delayed_work(&td->ulps_work);
371 static int taal_enter_ulps(struct omap_dss_device *dssdev)
373 struct taal_data *td = dev_get_drvdata(&dssdev->dev);
374 struct nokia_dsi_panel_data *panel_data = get_panel_data(dssdev);
377 if (td->ulps_enabled)
380 taal_cancel_ulps_work(dssdev);
382 r = _taal_enable_te(dssdev, false);
386 disable_irq(gpio_to_irq(panel_data->ext_te_gpio));
388 omapdss_dsi_display_disable(dssdev, false, true);
390 td->ulps_enabled = true;
395 dev_err(&dssdev->dev, "enter ULPS failed");
396 taal_panel_reset(dssdev);
398 td->ulps_enabled = false;
400 taal_queue_ulps_work(dssdev);
405 static int taal_exit_ulps(struct omap_dss_device *dssdev)
407 struct taal_data *td = dev_get_drvdata(&dssdev->dev);
408 struct nokia_dsi_panel_data *panel_data = get_panel_data(dssdev);
411 if (!td->ulps_enabled)
414 r = omapdss_dsi_display_enable(dssdev);
416 dev_err(&dssdev->dev, "failed to enable DSI\n");
420 omapdss_dsi_vc_enable_hs(dssdev, td->channel, true);
422 r = _taal_enable_te(dssdev, true);
424 dev_err(&dssdev->dev, "failed to re-enable TE");
428 enable_irq(gpio_to_irq(panel_data->ext_te_gpio));
430 taal_queue_ulps_work(dssdev);
432 td->ulps_enabled = false;
437 dev_err(&dssdev->dev, "failed to exit ULPS");
439 r = taal_panel_reset(dssdev);
441 enable_irq(gpio_to_irq(panel_data->ext_te_gpio));
442 td->ulps_enabled = false;
445 taal_queue_ulps_work(dssdev);
450 static int taal_wake_up(struct omap_dss_device *dssdev)
452 struct taal_data *td = dev_get_drvdata(&dssdev->dev);
454 if (td->ulps_enabled)
455 return taal_exit_ulps(dssdev);
457 taal_cancel_ulps_work(dssdev);
458 taal_queue_ulps_work(dssdev);
462 static int taal_bl_update_status(struct backlight_device *dev)
464 struct omap_dss_device *dssdev = dev_get_drvdata(&dev->dev);
465 struct taal_data *td = dev_get_drvdata(&dssdev->dev);
469 if (dev->props.fb_blank == FB_BLANK_UNBLANK &&
470 dev->props.power == FB_BLANK_UNBLANK)
471 level = dev->props.brightness;
475 dev_dbg(&dssdev->dev, "update brightness to %d\n", level);
477 mutex_lock(&td->lock);
480 dsi_bus_lock(dssdev);
482 r = taal_wake_up(dssdev);
484 r = taal_dcs_write_1(td, DCS_BRIGHTNESS, level);
486 dsi_bus_unlock(dssdev);
491 mutex_unlock(&td->lock);
496 static int taal_bl_get_intensity(struct backlight_device *dev)
498 if (dev->props.fb_blank == FB_BLANK_UNBLANK &&
499 dev->props.power == FB_BLANK_UNBLANK)
500 return dev->props.brightness;
505 static const struct backlight_ops taal_bl_ops = {
506 .get_brightness = taal_bl_get_intensity,
507 .update_status = taal_bl_update_status,
510 static void taal_get_resolution(struct omap_dss_device *dssdev,
511 u16 *xres, u16 *yres)
513 struct taal_data *td = dev_get_drvdata(&dssdev->dev);
515 if (td->rotate == 0 || td->rotate == 2) {
516 *xres = dssdev->panel.timings.x_res;
517 *yres = dssdev->panel.timings.y_res;
519 *yres = dssdev->panel.timings.x_res;
520 *xres = dssdev->panel.timings.y_res;
524 static ssize_t taal_num_errors_show(struct device *dev,
525 struct device_attribute *attr, char *buf)
527 struct omap_dss_device *dssdev = to_dss_device(dev);
528 struct taal_data *td = dev_get_drvdata(&dssdev->dev);
532 mutex_lock(&td->lock);
535 dsi_bus_lock(dssdev);
537 r = taal_wake_up(dssdev);
539 r = taal_dcs_read_1(td, DCS_READ_NUM_ERRORS, &errors);
541 dsi_bus_unlock(dssdev);
546 mutex_unlock(&td->lock);
551 return snprintf(buf, PAGE_SIZE, "%d\n", errors);
554 static ssize_t taal_hw_revision_show(struct device *dev,
555 struct device_attribute *attr, char *buf)
557 struct omap_dss_device *dssdev = to_dss_device(dev);
558 struct taal_data *td = dev_get_drvdata(&dssdev->dev);
562 mutex_lock(&td->lock);
565 dsi_bus_lock(dssdev);
567 r = taal_wake_up(dssdev);
569 r = taal_get_id(td, &id1, &id2, &id3);
571 dsi_bus_unlock(dssdev);
576 mutex_unlock(&td->lock);
581 return snprintf(buf, PAGE_SIZE, "%02x.%02x.%02x\n", id1, id2, id3);
584 static const char *cabc_modes[] = {
585 "off", /* used also always when CABC is not supported */
591 static ssize_t show_cabc_mode(struct device *dev,
592 struct device_attribute *attr,
595 struct omap_dss_device *dssdev = to_dss_device(dev);
596 struct taal_data *td = dev_get_drvdata(&dssdev->dev);
597 const char *mode_str;
601 mode = td->cabc_mode;
603 mode_str = "unknown";
604 if (mode >= 0 && mode < ARRAY_SIZE(cabc_modes))
605 mode_str = cabc_modes[mode];
606 len = snprintf(buf, PAGE_SIZE, "%s\n", mode_str);
608 return len < PAGE_SIZE - 1 ? len : PAGE_SIZE - 1;
611 static ssize_t store_cabc_mode(struct device *dev,
612 struct device_attribute *attr,
613 const char *buf, size_t count)
615 struct omap_dss_device *dssdev = to_dss_device(dev);
616 struct taal_data *td = dev_get_drvdata(&dssdev->dev);
620 for (i = 0; i < ARRAY_SIZE(cabc_modes); i++) {
621 if (sysfs_streq(cabc_modes[i], buf))
625 if (i == ARRAY_SIZE(cabc_modes))
628 mutex_lock(&td->lock);
631 dsi_bus_lock(dssdev);
633 if (!td->cabc_broken) {
634 r = taal_wake_up(dssdev);
638 r = taal_dcs_write_1(td, DCS_WRITE_CABC, i);
643 dsi_bus_unlock(dssdev);
648 mutex_unlock(&td->lock);
652 dsi_bus_unlock(dssdev);
653 mutex_unlock(&td->lock);
657 static ssize_t show_cabc_available_modes(struct device *dev,
658 struct device_attribute *attr,
665 len < PAGE_SIZE && i < ARRAY_SIZE(cabc_modes); i++)
666 len += snprintf(&buf[len], PAGE_SIZE - len, "%s%s%s",
667 i ? " " : "", cabc_modes[i],
668 i == ARRAY_SIZE(cabc_modes) - 1 ? "\n" : "");
670 return len < PAGE_SIZE ? len : PAGE_SIZE - 1;
673 static ssize_t taal_store_esd_interval(struct device *dev,
674 struct device_attribute *attr,
675 const char *buf, size_t count)
677 struct omap_dss_device *dssdev = to_dss_device(dev);
678 struct taal_data *td = dev_get_drvdata(&dssdev->dev);
683 r = strict_strtoul(buf, 10, &t);
687 mutex_lock(&td->lock);
688 taal_cancel_esd_work(dssdev);
689 td->esd_interval = t;
691 taal_queue_esd_work(dssdev);
692 mutex_unlock(&td->lock);
697 static ssize_t taal_show_esd_interval(struct device *dev,
698 struct device_attribute *attr,
701 struct omap_dss_device *dssdev = to_dss_device(dev);
702 struct taal_data *td = dev_get_drvdata(&dssdev->dev);
705 mutex_lock(&td->lock);
706 t = td->esd_interval;
707 mutex_unlock(&td->lock);
709 return snprintf(buf, PAGE_SIZE, "%u\n", t);
712 static ssize_t taal_store_ulps(struct device *dev,
713 struct device_attribute *attr,
714 const char *buf, size_t count)
716 struct omap_dss_device *dssdev = to_dss_device(dev);
717 struct taal_data *td = dev_get_drvdata(&dssdev->dev);
721 r = strict_strtoul(buf, 10, &t);
725 mutex_lock(&td->lock);
728 dsi_bus_lock(dssdev);
731 r = taal_enter_ulps(dssdev);
733 r = taal_wake_up(dssdev);
735 dsi_bus_unlock(dssdev);
738 mutex_unlock(&td->lock);
746 static ssize_t taal_show_ulps(struct device *dev,
747 struct device_attribute *attr,
750 struct omap_dss_device *dssdev = to_dss_device(dev);
751 struct taal_data *td = dev_get_drvdata(&dssdev->dev);
754 mutex_lock(&td->lock);
755 t = td->ulps_enabled;
756 mutex_unlock(&td->lock);
758 return snprintf(buf, PAGE_SIZE, "%u\n", t);
761 static ssize_t taal_store_ulps_timeout(struct device *dev,
762 struct device_attribute *attr,
763 const char *buf, size_t count)
765 struct omap_dss_device *dssdev = to_dss_device(dev);
766 struct taal_data *td = dev_get_drvdata(&dssdev->dev);
770 r = strict_strtoul(buf, 10, &t);
774 mutex_lock(&td->lock);
775 td->ulps_timeout = t;
778 /* taal_wake_up will restart the timer */
779 dsi_bus_lock(dssdev);
780 r = taal_wake_up(dssdev);
781 dsi_bus_unlock(dssdev);
784 mutex_unlock(&td->lock);
792 static ssize_t taal_show_ulps_timeout(struct device *dev,
793 struct device_attribute *attr,
796 struct omap_dss_device *dssdev = to_dss_device(dev);
797 struct taal_data *td = dev_get_drvdata(&dssdev->dev);
800 mutex_lock(&td->lock);
801 t = td->ulps_timeout;
802 mutex_unlock(&td->lock);
804 return snprintf(buf, PAGE_SIZE, "%u\n", t);
807 static DEVICE_ATTR(num_dsi_errors, S_IRUGO, taal_num_errors_show, NULL);
808 static DEVICE_ATTR(hw_revision, S_IRUGO, taal_hw_revision_show, NULL);
809 static DEVICE_ATTR(cabc_mode, S_IRUGO | S_IWUSR,
810 show_cabc_mode, store_cabc_mode);
811 static DEVICE_ATTR(cabc_available_modes, S_IRUGO,
812 show_cabc_available_modes, NULL);
813 static DEVICE_ATTR(esd_interval, S_IRUGO | S_IWUSR,
814 taal_show_esd_interval, taal_store_esd_interval);
815 static DEVICE_ATTR(ulps, S_IRUGO | S_IWUSR,
816 taal_show_ulps, taal_store_ulps);
817 static DEVICE_ATTR(ulps_timeout, S_IRUGO | S_IWUSR,
818 taal_show_ulps_timeout, taal_store_ulps_timeout);
820 static struct attribute *taal_attrs[] = {
821 &dev_attr_num_dsi_errors.attr,
822 &dev_attr_hw_revision.attr,
823 &dev_attr_cabc_mode.attr,
824 &dev_attr_cabc_available_modes.attr,
825 &dev_attr_esd_interval.attr,
827 &dev_attr_ulps_timeout.attr,
831 static struct attribute_group taal_attr_group = {
835 static void taal_hw_reset(struct omap_dss_device *dssdev)
837 struct taal_data *td = dev_get_drvdata(&dssdev->dev);
838 struct nokia_dsi_panel_data *panel_data = get_panel_data(dssdev);
840 if (panel_data->reset_gpio == -1)
843 gpio_set_value(panel_data->reset_gpio, 1);
844 if (td->panel_config->reset_sequence.high)
845 udelay(td->panel_config->reset_sequence.high);
846 /* reset the panel */
847 gpio_set_value(panel_data->reset_gpio, 0);
849 if (td->panel_config->reset_sequence.low)
850 udelay(td->panel_config->reset_sequence.low);
851 gpio_set_value(panel_data->reset_gpio, 1);
852 /* wait after releasing reset */
853 if (td->panel_config->sleep.hw_reset)
854 msleep(td->panel_config->sleep.hw_reset);
857 static int taal_probe(struct omap_dss_device *dssdev)
859 struct backlight_properties props;
860 struct taal_data *td;
861 struct backlight_device *bldev = NULL;
862 struct nokia_dsi_panel_data *panel_data = get_panel_data(dssdev);
863 struct panel_config *panel_config = NULL;
866 dev_dbg(&dssdev->dev, "probe\n");
868 if (!panel_data || !panel_data->name) {
873 for (i = 0; i < ARRAY_SIZE(panel_configs); i++) {
874 if (strcmp(panel_data->name, panel_configs[i].name) == 0) {
875 panel_config = &panel_configs[i];
885 dssdev->panel.config = OMAP_DSS_LCD_TFT;
886 dssdev->panel.timings = panel_config->timings;
887 dssdev->panel.dsi_pix_fmt = OMAP_DSS_DSI_FMT_RGB888;
889 td = kzalloc(sizeof(*td), GFP_KERNEL);
895 td->panel_config = panel_config;
896 td->esd_interval = panel_data->esd_interval;
897 td->ulps_enabled = false;
898 td->ulps_timeout = panel_data->ulps_timeout;
900 mutex_init(&td->lock);
902 atomic_set(&td->do_update, 0);
904 td->workqueue = create_singlethread_workqueue("taal_esd");
905 if (td->workqueue == NULL) {
906 dev_err(&dssdev->dev, "can't create ESD workqueue\n");
910 INIT_DELAYED_WORK_DEFERRABLE(&td->esd_work, taal_esd_work);
911 INIT_DELAYED_WORK(&td->ulps_work, taal_ulps_work);
913 dev_set_drvdata(&dssdev->dev, td);
915 if (gpio_is_valid(panel_data->reset_gpio)) {
916 r = gpio_request_one(panel_data->reset_gpio, GPIOF_OUT_INIT_LOW,
919 dev_err(&dssdev->dev, "failed to request reset gpio\n");
924 taal_hw_reset(dssdev);
926 if (panel_data->use_dsi_backlight) {
927 memset(&props, 0, sizeof(struct backlight_properties));
928 props.max_brightness = 255;
930 props.type = BACKLIGHT_RAW;
931 bldev = backlight_device_register(dev_name(&dssdev->dev),
932 &dssdev->dev, dssdev, &taal_bl_ops, &props);
940 bldev->props.fb_blank = FB_BLANK_UNBLANK;
941 bldev->props.power = FB_BLANK_UNBLANK;
942 bldev->props.brightness = 255;
944 taal_bl_update_status(bldev);
947 if (panel_data->use_ext_te) {
948 int gpio = panel_data->ext_te_gpio;
950 r = gpio_request_one(gpio, GPIOF_IN, "taal irq");
952 dev_err(&dssdev->dev, "GPIO request failed\n");
956 r = request_irq(gpio_to_irq(gpio), taal_te_isr,
958 "taal vsync", dssdev);
961 dev_err(&dssdev->dev, "IRQ request failed\n");
966 INIT_DELAYED_WORK_DEFERRABLE(&td->te_timeout_work,
967 taal_te_timeout_work_callback);
969 dev_dbg(&dssdev->dev, "Using GPIO TE\n");
972 r = omap_dsi_request_vc(dssdev, &td->channel);
974 dev_err(&dssdev->dev, "failed to get virtual channel\n");
978 r = omap_dsi_set_vc_id(dssdev, td->channel, TCH);
980 dev_err(&dssdev->dev, "failed to set VC_ID\n");
984 r = sysfs_create_group(&dssdev->dev.kobj, &taal_attr_group);
986 dev_err(&dssdev->dev, "failed to create sysfs files\n");
993 omap_dsi_release_vc(dssdev, td->channel);
995 if (panel_data->use_ext_te)
996 free_irq(gpio_to_irq(panel_data->ext_te_gpio), dssdev);
998 if (panel_data->use_ext_te)
999 gpio_free(panel_data->ext_te_gpio);
1002 backlight_device_unregister(bldev);
1004 if (gpio_is_valid(panel_data->reset_gpio))
1005 gpio_free(panel_data->reset_gpio);
1007 destroy_workqueue(td->workqueue);
1014 static void __exit taal_remove(struct omap_dss_device *dssdev)
1016 struct taal_data *td = dev_get_drvdata(&dssdev->dev);
1017 struct nokia_dsi_panel_data *panel_data = get_panel_data(dssdev);
1018 struct backlight_device *bldev;
1020 dev_dbg(&dssdev->dev, "remove\n");
1022 sysfs_remove_group(&dssdev->dev.kobj, &taal_attr_group);
1023 omap_dsi_release_vc(dssdev, td->channel);
1025 if (panel_data->use_ext_te) {
1026 int gpio = panel_data->ext_te_gpio;
1027 free_irq(gpio_to_irq(gpio), dssdev);
1032 if (bldev != NULL) {
1033 bldev->props.power = FB_BLANK_POWERDOWN;
1034 taal_bl_update_status(bldev);
1035 backlight_device_unregister(bldev);
1038 taal_cancel_ulps_work(dssdev);
1039 taal_cancel_esd_work(dssdev);
1040 destroy_workqueue(td->workqueue);
1042 /* reset, to be sure that the panel is in a valid state */
1043 taal_hw_reset(dssdev);
1045 if (gpio_is_valid(panel_data->reset_gpio))
1046 gpio_free(panel_data->reset_gpio);
1051 static int taal_power_on(struct omap_dss_device *dssdev)
1053 struct taal_data *td = dev_get_drvdata(&dssdev->dev);
1054 struct nokia_dsi_panel_data *panel_data = get_panel_data(dssdev);
1058 r = omapdss_dsi_configure_pins(dssdev, &panel_data->pin_config);
1060 dev_err(&dssdev->dev, "failed to configure DSI pins\n");
1064 r = omapdss_dsi_display_enable(dssdev);
1066 dev_err(&dssdev->dev, "failed to enable DSI\n");
1070 taal_hw_reset(dssdev);
1072 omapdss_dsi_vc_enable_hs(dssdev, td->channel, false);
1074 r = taal_sleep_out(td);
1078 r = taal_get_id(td, &id1, &id2, &id3);
1082 /* on early Taal revisions CABC is broken */
1083 if (td->panel_config->type == PANEL_TAAL &&
1084 (id2 == 0x00 || id2 == 0xff || id2 == 0x81))
1085 td->cabc_broken = true;
1087 r = taal_dcs_write_1(td, DCS_BRIGHTNESS, 0xff);
1091 r = taal_dcs_write_1(td, DCS_CTRL_DISPLAY,
1092 (1<<2) | (1<<5)); /* BL | BCTRL */
1096 r = taal_dcs_write_1(td, MIPI_DCS_SET_PIXEL_FORMAT,
1097 MIPI_DCS_PIXEL_FMT_24BIT);
1101 r = taal_set_addr_mode(td, td->rotate, td->mirror);
1105 if (!td->cabc_broken) {
1106 r = taal_dcs_write_1(td, DCS_WRITE_CABC, td->cabc_mode);
1111 r = taal_dcs_write_0(td, MIPI_DCS_SET_DISPLAY_ON);
1115 r = _taal_enable_te(dssdev, td->te_enabled);
1119 r = dsi_enable_video_output(dssdev, td->channel);
1125 if (!td->intro_printed) {
1126 dev_info(&dssdev->dev, "%s panel revision %02x.%02x.%02x\n",
1127 td->panel_config->name, id1, id2, id3);
1128 if (td->cabc_broken)
1129 dev_info(&dssdev->dev,
1130 "old Taal version, CABC disabled\n");
1131 td->intro_printed = true;
1134 omapdss_dsi_vc_enable_hs(dssdev, td->channel, true);
1138 dev_err(&dssdev->dev, "error while enabling panel, issuing HW reset\n");
1140 taal_hw_reset(dssdev);
1142 omapdss_dsi_display_disable(dssdev, true, false);
1147 static void taal_power_off(struct omap_dss_device *dssdev)
1149 struct taal_data *td = dev_get_drvdata(&dssdev->dev);
1152 dsi_disable_video_output(dssdev, td->channel);
1154 r = taal_dcs_write_0(td, MIPI_DCS_SET_DISPLAY_OFF);
1156 r = taal_sleep_in(td);
1159 dev_err(&dssdev->dev,
1160 "error disabling panel, issuing HW reset\n");
1161 taal_hw_reset(dssdev);
1164 omapdss_dsi_display_disable(dssdev, true, false);
1169 static int taal_panel_reset(struct omap_dss_device *dssdev)
1171 dev_err(&dssdev->dev, "performing LCD reset\n");
1173 taal_power_off(dssdev);
1174 taal_hw_reset(dssdev);
1175 return taal_power_on(dssdev);
1178 static int taal_enable(struct omap_dss_device *dssdev)
1180 struct taal_data *td = dev_get_drvdata(&dssdev->dev);
1183 dev_dbg(&dssdev->dev, "enable\n");
1185 mutex_lock(&td->lock);
1187 if (dssdev->state != OMAP_DSS_DISPLAY_DISABLED) {
1192 dsi_bus_lock(dssdev);
1194 r = taal_power_on(dssdev);
1196 dsi_bus_unlock(dssdev);
1201 taal_queue_esd_work(dssdev);
1203 dssdev->state = OMAP_DSS_DISPLAY_ACTIVE;
1205 mutex_unlock(&td->lock);
1209 dev_dbg(&dssdev->dev, "enable failed\n");
1210 mutex_unlock(&td->lock);
1214 static void taal_disable(struct omap_dss_device *dssdev)
1216 struct taal_data *td = dev_get_drvdata(&dssdev->dev);
1218 dev_dbg(&dssdev->dev, "disable\n");
1220 mutex_lock(&td->lock);
1222 taal_cancel_ulps_work(dssdev);
1223 taal_cancel_esd_work(dssdev);
1225 dsi_bus_lock(dssdev);
1227 if (dssdev->state == OMAP_DSS_DISPLAY_ACTIVE) {
1230 r = taal_wake_up(dssdev);
1232 taal_power_off(dssdev);
1235 dsi_bus_unlock(dssdev);
1237 dssdev->state = OMAP_DSS_DISPLAY_DISABLED;
1239 mutex_unlock(&td->lock);
1242 static int taal_suspend(struct omap_dss_device *dssdev)
1244 struct taal_data *td = dev_get_drvdata(&dssdev->dev);
1247 dev_dbg(&dssdev->dev, "suspend\n");
1249 mutex_lock(&td->lock);
1251 if (dssdev->state != OMAP_DSS_DISPLAY_ACTIVE) {
1256 taal_cancel_ulps_work(dssdev);
1257 taal_cancel_esd_work(dssdev);
1259 dsi_bus_lock(dssdev);
1261 r = taal_wake_up(dssdev);
1263 taal_power_off(dssdev);
1265 dsi_bus_unlock(dssdev);
1267 dssdev->state = OMAP_DSS_DISPLAY_SUSPENDED;
1269 mutex_unlock(&td->lock);
1273 mutex_unlock(&td->lock);
1277 static int taal_resume(struct omap_dss_device *dssdev)
1279 struct taal_data *td = dev_get_drvdata(&dssdev->dev);
1282 dev_dbg(&dssdev->dev, "resume\n");
1284 mutex_lock(&td->lock);
1286 if (dssdev->state != OMAP_DSS_DISPLAY_SUSPENDED) {
1291 dsi_bus_lock(dssdev);
1293 r = taal_power_on(dssdev);
1295 dsi_bus_unlock(dssdev);
1298 dssdev->state = OMAP_DSS_DISPLAY_DISABLED;
1300 dssdev->state = OMAP_DSS_DISPLAY_ACTIVE;
1301 taal_queue_esd_work(dssdev);
1304 mutex_unlock(&td->lock);
1308 mutex_unlock(&td->lock);
1312 static void taal_framedone_cb(int err, void *data)
1314 struct omap_dss_device *dssdev = data;
1315 dev_dbg(&dssdev->dev, "framedone, err %d\n", err);
1316 dsi_bus_unlock(dssdev);
1319 static irqreturn_t taal_te_isr(int irq, void *data)
1321 struct omap_dss_device *dssdev = data;
1322 struct taal_data *td = dev_get_drvdata(&dssdev->dev);
1326 old = atomic_cmpxchg(&td->do_update, 1, 0);
1329 cancel_delayed_work(&td->te_timeout_work);
1331 r = omap_dsi_update(dssdev, td->channel, taal_framedone_cb,
1339 dev_err(&dssdev->dev, "start update failed\n");
1340 dsi_bus_unlock(dssdev);
1344 static void taal_te_timeout_work_callback(struct work_struct *work)
1346 struct taal_data *td = container_of(work, struct taal_data,
1347 te_timeout_work.work);
1348 struct omap_dss_device *dssdev = td->dssdev;
1350 dev_err(&dssdev->dev, "TE not received for 250ms!\n");
1352 atomic_set(&td->do_update, 0);
1353 dsi_bus_unlock(dssdev);
1356 static int taal_update(struct omap_dss_device *dssdev,
1357 u16 x, u16 y, u16 w, u16 h)
1359 struct taal_data *td = dev_get_drvdata(&dssdev->dev);
1360 struct nokia_dsi_panel_data *panel_data = get_panel_data(dssdev);
1363 dev_dbg(&dssdev->dev, "update %d, %d, %d x %d\n", x, y, w, h);
1365 mutex_lock(&td->lock);
1366 dsi_bus_lock(dssdev);
1368 r = taal_wake_up(dssdev);
1377 /* XXX no need to send this every frame, but dsi break if not done */
1378 r = taal_set_update_window(td, 0, 0,
1379 td->panel_config->timings.x_res,
1380 td->panel_config->timings.y_res);
1384 if (td->te_enabled && panel_data->use_ext_te) {
1385 schedule_delayed_work(&td->te_timeout_work,
1386 msecs_to_jiffies(250));
1387 atomic_set(&td->do_update, 1);
1389 r = omap_dsi_update(dssdev, td->channel, taal_framedone_cb,
1395 /* note: no bus_unlock here. unlock is in framedone_cb */
1396 mutex_unlock(&td->lock);
1399 dsi_bus_unlock(dssdev);
1400 mutex_unlock(&td->lock);
1404 static int taal_sync(struct omap_dss_device *dssdev)
1406 struct taal_data *td = dev_get_drvdata(&dssdev->dev);
1408 dev_dbg(&dssdev->dev, "sync\n");
1410 mutex_lock(&td->lock);
1411 dsi_bus_lock(dssdev);
1412 dsi_bus_unlock(dssdev);
1413 mutex_unlock(&td->lock);
1415 dev_dbg(&dssdev->dev, "sync done\n");
1420 static int _taal_enable_te(struct omap_dss_device *dssdev, bool enable)
1422 struct taal_data *td = dev_get_drvdata(&dssdev->dev);
1423 struct nokia_dsi_panel_data *panel_data = get_panel_data(dssdev);
1427 r = taal_dcs_write_1(td, MIPI_DCS_SET_TEAR_ON, 0);
1429 r = taal_dcs_write_0(td, MIPI_DCS_SET_TEAR_OFF);
1431 if (!panel_data->use_ext_te)
1432 omapdss_dsi_enable_te(dssdev, enable);
1434 if (td->panel_config->sleep.enable_te)
1435 msleep(td->panel_config->sleep.enable_te);
1440 static int taal_enable_te(struct omap_dss_device *dssdev, bool enable)
1442 struct taal_data *td = dev_get_drvdata(&dssdev->dev);
1445 mutex_lock(&td->lock);
1447 if (td->te_enabled == enable)
1450 dsi_bus_lock(dssdev);
1453 r = taal_wake_up(dssdev);
1457 r = _taal_enable_te(dssdev, enable);
1462 td->te_enabled = enable;
1464 dsi_bus_unlock(dssdev);
1466 mutex_unlock(&td->lock);
1470 dsi_bus_unlock(dssdev);
1471 mutex_unlock(&td->lock);
1476 static int taal_get_te(struct omap_dss_device *dssdev)
1478 struct taal_data *td = dev_get_drvdata(&dssdev->dev);
1481 mutex_lock(&td->lock);
1483 mutex_unlock(&td->lock);
1488 static int taal_rotate(struct omap_dss_device *dssdev, u8 rotate)
1490 struct taal_data *td = dev_get_drvdata(&dssdev->dev);
1493 dev_dbg(&dssdev->dev, "rotate %d\n", rotate);
1495 mutex_lock(&td->lock);
1497 if (td->rotate == rotate)
1500 dsi_bus_lock(dssdev);
1503 r = taal_wake_up(dssdev);
1507 r = taal_set_addr_mode(td, rotate, td->mirror);
1512 td->rotate = rotate;
1514 dsi_bus_unlock(dssdev);
1516 mutex_unlock(&td->lock);
1519 dsi_bus_unlock(dssdev);
1520 mutex_unlock(&td->lock);
1524 static u8 taal_get_rotate(struct omap_dss_device *dssdev)
1526 struct taal_data *td = dev_get_drvdata(&dssdev->dev);
1529 mutex_lock(&td->lock);
1531 mutex_unlock(&td->lock);
1536 static int taal_mirror(struct omap_dss_device *dssdev, bool enable)
1538 struct taal_data *td = dev_get_drvdata(&dssdev->dev);
1541 dev_dbg(&dssdev->dev, "mirror %d\n", enable);
1543 mutex_lock(&td->lock);
1545 if (td->mirror == enable)
1548 dsi_bus_lock(dssdev);
1550 r = taal_wake_up(dssdev);
1554 r = taal_set_addr_mode(td, td->rotate, enable);
1559 td->mirror = enable;
1561 dsi_bus_unlock(dssdev);
1563 mutex_unlock(&td->lock);
1566 dsi_bus_unlock(dssdev);
1567 mutex_unlock(&td->lock);
1571 static bool taal_get_mirror(struct omap_dss_device *dssdev)
1573 struct taal_data *td = dev_get_drvdata(&dssdev->dev);
1576 mutex_lock(&td->lock);
1578 mutex_unlock(&td->lock);
1583 static int taal_run_test(struct omap_dss_device *dssdev, int test_num)
1585 struct taal_data *td = dev_get_drvdata(&dssdev->dev);
1589 mutex_lock(&td->lock);
1596 dsi_bus_lock(dssdev);
1598 r = taal_wake_up(dssdev);
1602 r = taal_dcs_read_1(td, DCS_GET_ID1, &id1);
1605 r = taal_dcs_read_1(td, DCS_GET_ID2, &id2);
1608 r = taal_dcs_read_1(td, DCS_GET_ID3, &id3);
1612 dsi_bus_unlock(dssdev);
1613 mutex_unlock(&td->lock);
1616 dsi_bus_unlock(dssdev);
1618 mutex_unlock(&td->lock);
1622 static int taal_memory_read(struct omap_dss_device *dssdev,
1623 void *buf, size_t size,
1624 u16 x, u16 y, u16 w, u16 h)
1629 unsigned buf_used = 0;
1630 struct taal_data *td = dev_get_drvdata(&dssdev->dev);
1632 if (size < w * h * 3)
1635 mutex_lock(&td->lock);
1642 size = min(w * h * 3,
1643 dssdev->panel.timings.x_res *
1644 dssdev->panel.timings.y_res * 3);
1646 dsi_bus_lock(dssdev);
1648 r = taal_wake_up(dssdev);
1652 /* plen 1 or 2 goes into short packet. until checksum error is fixed,
1653 * use short packets. plen 32 works, but bigger packets seem to cause
1660 taal_set_update_window(td, x, y, w, h);
1662 r = dsi_vc_set_max_rx_packet_size(dssdev, td->channel, plen);
1666 while (buf_used < size) {
1667 u8 dcs_cmd = first ? 0x2e : 0x3e;
1670 r = dsi_vc_dcs_read(dssdev, td->channel, dcs_cmd,
1671 buf + buf_used, size - buf_used);
1674 dev_err(&dssdev->dev, "read error\n");
1681 dev_err(&dssdev->dev, "short read\n");
1685 if (signal_pending(current)) {
1686 dev_err(&dssdev->dev, "signal pending, "
1687 "aborting memory read\n");
1696 dsi_vc_set_max_rx_packet_size(dssdev, td->channel, 1);
1698 dsi_bus_unlock(dssdev);
1700 mutex_unlock(&td->lock);
1704 static void taal_ulps_work(struct work_struct *work)
1706 struct taal_data *td = container_of(work, struct taal_data,
1708 struct omap_dss_device *dssdev = td->dssdev;
1710 mutex_lock(&td->lock);
1712 if (dssdev->state != OMAP_DSS_DISPLAY_ACTIVE || !td->enabled) {
1713 mutex_unlock(&td->lock);
1717 dsi_bus_lock(dssdev);
1719 taal_enter_ulps(dssdev);
1721 dsi_bus_unlock(dssdev);
1722 mutex_unlock(&td->lock);
1725 static void taal_esd_work(struct work_struct *work)
1727 struct taal_data *td = container_of(work, struct taal_data,
1729 struct omap_dss_device *dssdev = td->dssdev;
1730 struct nokia_dsi_panel_data *panel_data = get_panel_data(dssdev);
1734 mutex_lock(&td->lock);
1737 mutex_unlock(&td->lock);
1741 dsi_bus_lock(dssdev);
1743 r = taal_wake_up(dssdev);
1745 dev_err(&dssdev->dev, "failed to exit ULPS\n");
1749 r = taal_dcs_read_1(td, MIPI_DCS_GET_DIAGNOSTIC_RESULT, &state1);
1751 dev_err(&dssdev->dev, "failed to read Taal status\n");
1755 /* Run self diagnostics */
1756 r = taal_sleep_out(td);
1758 dev_err(&dssdev->dev, "failed to run Taal self-diagnostics\n");
1762 r = taal_dcs_read_1(td, MIPI_DCS_GET_DIAGNOSTIC_RESULT, &state2);
1764 dev_err(&dssdev->dev, "failed to read Taal status\n");
1768 /* Each sleep out command will trigger a self diagnostic and flip
1769 * Bit6 if the test passes.
1771 if (!((state1 ^ state2) & (1 << 6))) {
1772 dev_err(&dssdev->dev, "LCD self diagnostics failed\n");
1775 /* Self-diagnostics result is also shown on TE GPIO line. We need
1776 * to re-enable TE after self diagnostics */
1777 if (td->te_enabled && panel_data->use_ext_te) {
1778 r = taal_dcs_write_1(td, MIPI_DCS_SET_TEAR_ON, 0);
1783 dsi_bus_unlock(dssdev);
1785 taal_queue_esd_work(dssdev);
1787 mutex_unlock(&td->lock);
1790 dev_err(&dssdev->dev, "performing LCD reset\n");
1792 taal_panel_reset(dssdev);
1794 dsi_bus_unlock(dssdev);
1796 taal_queue_esd_work(dssdev);
1798 mutex_unlock(&td->lock);
1801 static struct omap_dss_driver taal_driver = {
1802 .probe = taal_probe,
1803 .remove = __exit_p(taal_remove),
1805 .enable = taal_enable,
1806 .disable = taal_disable,
1807 .suspend = taal_suspend,
1808 .resume = taal_resume,
1810 .update = taal_update,
1813 .get_resolution = taal_get_resolution,
1814 .get_recommended_bpp = omapdss_default_get_recommended_bpp,
1816 .enable_te = taal_enable_te,
1817 .get_te = taal_get_te,
1819 .set_rotate = taal_rotate,
1820 .get_rotate = taal_get_rotate,
1821 .set_mirror = taal_mirror,
1822 .get_mirror = taal_get_mirror,
1823 .run_test = taal_run_test,
1824 .memory_read = taal_memory_read,
1828 .owner = THIS_MODULE,
1832 static int __init taal_init(void)
1834 omap_dss_register_driver(&taal_driver);
1839 static void __exit taal_exit(void)
1841 omap_dss_unregister_driver(&taal_driver);
1844 module_init(taal_init);
1845 module_exit(taal_exit);
1847 MODULE_AUTHOR("Tomi Valkeinen <tomi.valkeinen@nokia.com>");
1848 MODULE_DESCRIPTION("Taal Driver");
1849 MODULE_LICENSE("GPL");