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/regulator/consumer.h>
34 #include <linux/mutex.h>
36 #include <video/omapdss.h>
37 #include <video/omap-panel-nokia-dsi.h>
38 #include <video/mipi_display.h>
40 /* DSI Virtual channel. Hardcoded for now. */
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
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);
56 static int taal_panel_reset(struct omap_dss_device *dssdev);
58 struct panel_regulator {
59 struct regulator *regulator;
65 static void free_regulators(struct panel_regulator *regulators, int n)
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);
76 static int init_regulators(struct omap_dss_device *dssdev,
77 struct panel_regulator *regulators, int n)
81 for (i = 0; i < n; i++) {
82 struct regulator *reg;
84 reg = regulator_get(&dssdev->dev, regulators[i].name);
86 dev_err(&dssdev->dev, "failed to get regulator %s\n",
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);
99 "failed to set regulator %s voltage\n",
106 r = regulator_enable(reg);
108 dev_err(&dssdev->dev, "failed to enable regulator %s\n",
114 regulators[i].regulator = reg;
120 free_regulators(regulators, i);
126 * struct panel_config - panel configuration
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
135 struct panel_config {
139 struct omap_video_timings timings;
142 unsigned int sleep_in;
143 unsigned int sleep_out;
144 unsigned int hw_reset;
145 unsigned int enable_te;
153 struct panel_regulator *regulators;
161 static struct panel_config panel_configs[] = {
173 .enable_te = 100, /* possible panel bug */
185 struct backlight_device *bldev;
187 unsigned long hw_guard_end; /* next value of jiffies when we can
188 * issue the next sleep in/out command
190 unsigned long hw_guard_wait; /* max guard time in jiffies */
192 struct omap_dss_device *dssdev;
203 struct delayed_work te_timeout_work;
210 struct workqueue_struct *workqueue;
212 struct delayed_work esd_work;
213 unsigned esd_interval;
216 unsigned ulps_timeout;
217 struct delayed_work ulps_work;
219 struct panel_config *panel_config;
222 static inline struct nokia_dsi_panel_data
223 *get_panel_data(const struct omap_dss_device *dssdev)
225 return (struct nokia_dsi_panel_data *) dssdev->data;
228 static void taal_esd_work(struct work_struct *work);
229 static void taal_ulps_work(struct work_struct *work);
231 static void hw_guard_start(struct taal_data *td, int guard_msec)
233 td->hw_guard_wait = msecs_to_jiffies(guard_msec);
234 td->hw_guard_end = jiffies + td->hw_guard_wait;
237 static void hw_guard_wait(struct taal_data *td)
239 unsigned long wait = td->hw_guard_end - jiffies;
241 if ((long)wait > 0 && wait <= td->hw_guard_wait) {
242 set_current_state(TASK_UNINTERRUPTIBLE);
243 schedule_timeout(wait);
247 static int taal_dcs_read_1(struct taal_data *td, u8 dcs_cmd, u8 *data)
252 r = dsi_vc_dcs_read(td->dssdev, td->channel, dcs_cmd, buf, 1);
262 static int taal_dcs_write_0(struct taal_data *td, u8 dcs_cmd)
264 return dsi_vc_dcs_write(td->dssdev, td->channel, &dcs_cmd, 1);
267 static int taal_dcs_write_1(struct taal_data *td, u8 dcs_cmd, u8 param)
272 return dsi_vc_dcs_write(td->dssdev, td->channel, buf, 2);
275 static int taal_sleep_in(struct taal_data *td)
283 cmd = MIPI_DCS_ENTER_SLEEP_MODE;
284 r = dsi_vc_dcs_write_nosync(td->dssdev, td->channel, &cmd, 1);
288 hw_guard_start(td, 120);
290 if (td->panel_config->sleep.sleep_in)
291 msleep(td->panel_config->sleep.sleep_in);
296 static int taal_sleep_out(struct taal_data *td)
302 r = taal_dcs_write_0(td, MIPI_DCS_EXIT_SLEEP_MODE);
306 hw_guard_start(td, 120);
308 if (td->panel_config->sleep.sleep_out)
309 msleep(td->panel_config->sleep.sleep_out);
314 static int taal_get_id(struct taal_data *td, u8 *id1, u8 *id2, u8 *id3)
318 r = taal_dcs_read_1(td, DCS_GET_ID1, id1);
321 r = taal_dcs_read_1(td, DCS_GET_ID2, id2);
324 r = taal_dcs_read_1(td, DCS_GET_ID3, id3);
331 static int taal_set_addr_mode(struct taal_data *td, u8 rotate, bool mirror)
337 r = taal_dcs_read_1(td, MIPI_DCS_GET_ADDRESS_MODE, &mode);
368 mode &= ~((1<<7) | (1<<6) | (1<<5));
369 mode |= (b7 << 7) | (b6 << 6) | (b5 << 5);
371 return taal_dcs_write_1(td, MIPI_DCS_SET_ADDRESS_MODE, mode);
374 static int taal_set_update_window(struct taal_data *td,
375 u16 x, u16 y, u16 w, u16 h)
384 buf[0] = MIPI_DCS_SET_COLUMN_ADDRESS;
385 buf[1] = (x1 >> 8) & 0xff;
386 buf[2] = (x1 >> 0) & 0xff;
387 buf[3] = (x2 >> 8) & 0xff;
388 buf[4] = (x2 >> 0) & 0xff;
390 r = dsi_vc_dcs_write_nosync(td->dssdev, td->channel, buf, sizeof(buf));
394 buf[0] = MIPI_DCS_SET_PAGE_ADDRESS;
395 buf[1] = (y1 >> 8) & 0xff;
396 buf[2] = (y1 >> 0) & 0xff;
397 buf[3] = (y2 >> 8) & 0xff;
398 buf[4] = (y2 >> 0) & 0xff;
400 r = dsi_vc_dcs_write_nosync(td->dssdev, td->channel, buf, sizeof(buf));
404 dsi_vc_send_bta_sync(td->dssdev, td->channel);
409 static void taal_queue_esd_work(struct omap_dss_device *dssdev)
411 struct taal_data *td = dev_get_drvdata(&dssdev->dev);
413 if (td->esd_interval > 0)
414 queue_delayed_work(td->workqueue, &td->esd_work,
415 msecs_to_jiffies(td->esd_interval));
418 static void taal_cancel_esd_work(struct omap_dss_device *dssdev)
420 struct taal_data *td = dev_get_drvdata(&dssdev->dev);
422 cancel_delayed_work(&td->esd_work);
425 static void taal_queue_ulps_work(struct omap_dss_device *dssdev)
427 struct taal_data *td = dev_get_drvdata(&dssdev->dev);
429 if (td->ulps_timeout > 0)
430 queue_delayed_work(td->workqueue, &td->ulps_work,
431 msecs_to_jiffies(td->ulps_timeout));
434 static void taal_cancel_ulps_work(struct omap_dss_device *dssdev)
436 struct taal_data *td = dev_get_drvdata(&dssdev->dev);
438 cancel_delayed_work(&td->ulps_work);
441 static int taal_enter_ulps(struct omap_dss_device *dssdev)
443 struct taal_data *td = dev_get_drvdata(&dssdev->dev);
444 struct nokia_dsi_panel_data *panel_data = get_panel_data(dssdev);
447 if (td->ulps_enabled)
450 taal_cancel_ulps_work(dssdev);
452 r = _taal_enable_te(dssdev, false);
456 disable_irq(gpio_to_irq(panel_data->ext_te_gpio));
458 omapdss_dsi_display_disable(dssdev, false, true);
460 td->ulps_enabled = true;
465 dev_err(&dssdev->dev, "enter ULPS failed");
466 taal_panel_reset(dssdev);
468 td->ulps_enabled = false;
470 taal_queue_ulps_work(dssdev);
475 static int taal_exit_ulps(struct omap_dss_device *dssdev)
477 struct taal_data *td = dev_get_drvdata(&dssdev->dev);
478 struct nokia_dsi_panel_data *panel_data = get_panel_data(dssdev);
481 if (!td->ulps_enabled)
484 r = omapdss_dsi_display_enable(dssdev);
486 dev_err(&dssdev->dev, "failed to enable DSI\n");
490 omapdss_dsi_vc_enable_hs(dssdev, td->channel, true);
492 r = _taal_enable_te(dssdev, true);
494 dev_err(&dssdev->dev, "failed to re-enable TE");
498 enable_irq(gpio_to_irq(panel_data->ext_te_gpio));
500 taal_queue_ulps_work(dssdev);
502 td->ulps_enabled = false;
507 dev_err(&dssdev->dev, "failed to exit ULPS");
509 r = taal_panel_reset(dssdev);
511 enable_irq(gpio_to_irq(panel_data->ext_te_gpio));
512 td->ulps_enabled = false;
515 taal_queue_ulps_work(dssdev);
520 static int taal_wake_up(struct omap_dss_device *dssdev)
522 struct taal_data *td = dev_get_drvdata(&dssdev->dev);
524 if (td->ulps_enabled)
525 return taal_exit_ulps(dssdev);
527 taal_cancel_ulps_work(dssdev);
528 taal_queue_ulps_work(dssdev);
532 static int taal_bl_update_status(struct backlight_device *dev)
534 struct omap_dss_device *dssdev = dev_get_drvdata(&dev->dev);
535 struct taal_data *td = dev_get_drvdata(&dssdev->dev);
539 if (dev->props.fb_blank == FB_BLANK_UNBLANK &&
540 dev->props.power == FB_BLANK_UNBLANK)
541 level = dev->props.brightness;
545 dev_dbg(&dssdev->dev, "update brightness to %d\n", level);
547 mutex_lock(&td->lock);
550 dsi_bus_lock(dssdev);
552 r = taal_wake_up(dssdev);
554 r = taal_dcs_write_1(td, DCS_BRIGHTNESS, level);
556 dsi_bus_unlock(dssdev);
561 mutex_unlock(&td->lock);
566 static int taal_bl_get_intensity(struct backlight_device *dev)
568 if (dev->props.fb_blank == FB_BLANK_UNBLANK &&
569 dev->props.power == FB_BLANK_UNBLANK)
570 return dev->props.brightness;
575 static const struct backlight_ops taal_bl_ops = {
576 .get_brightness = taal_bl_get_intensity,
577 .update_status = taal_bl_update_status,
580 static void taal_get_timings(struct omap_dss_device *dssdev,
581 struct omap_video_timings *timings)
583 *timings = dssdev->panel.timings;
586 static void taal_get_resolution(struct omap_dss_device *dssdev,
587 u16 *xres, u16 *yres)
589 struct taal_data *td = dev_get_drvdata(&dssdev->dev);
591 if (td->rotate == 0 || td->rotate == 2) {
592 *xres = dssdev->panel.timings.x_res;
593 *yres = dssdev->panel.timings.y_res;
595 *yres = dssdev->panel.timings.x_res;
596 *xres = dssdev->panel.timings.y_res;
600 static ssize_t taal_num_errors_show(struct device *dev,
601 struct device_attribute *attr, char *buf)
603 struct omap_dss_device *dssdev = to_dss_device(dev);
604 struct taal_data *td = dev_get_drvdata(&dssdev->dev);
608 mutex_lock(&td->lock);
611 dsi_bus_lock(dssdev);
613 r = taal_wake_up(dssdev);
615 r = taal_dcs_read_1(td, DCS_READ_NUM_ERRORS, &errors);
617 dsi_bus_unlock(dssdev);
622 mutex_unlock(&td->lock);
627 return snprintf(buf, PAGE_SIZE, "%d\n", errors);
630 static ssize_t taal_hw_revision_show(struct device *dev,
631 struct device_attribute *attr, char *buf)
633 struct omap_dss_device *dssdev = to_dss_device(dev);
634 struct taal_data *td = dev_get_drvdata(&dssdev->dev);
638 mutex_lock(&td->lock);
641 dsi_bus_lock(dssdev);
643 r = taal_wake_up(dssdev);
645 r = taal_get_id(td, &id1, &id2, &id3);
647 dsi_bus_unlock(dssdev);
652 mutex_unlock(&td->lock);
657 return snprintf(buf, PAGE_SIZE, "%02x.%02x.%02x\n", id1, id2, id3);
660 static const char *cabc_modes[] = {
661 "off", /* used also always when CABC is not supported */
667 static ssize_t show_cabc_mode(struct device *dev,
668 struct device_attribute *attr,
671 struct omap_dss_device *dssdev = to_dss_device(dev);
672 struct taal_data *td = dev_get_drvdata(&dssdev->dev);
673 const char *mode_str;
677 mode = td->cabc_mode;
679 mode_str = "unknown";
680 if (mode >= 0 && mode < ARRAY_SIZE(cabc_modes))
681 mode_str = cabc_modes[mode];
682 len = snprintf(buf, PAGE_SIZE, "%s\n", mode_str);
684 return len < PAGE_SIZE - 1 ? len : PAGE_SIZE - 1;
687 static ssize_t store_cabc_mode(struct device *dev,
688 struct device_attribute *attr,
689 const char *buf, size_t count)
691 struct omap_dss_device *dssdev = to_dss_device(dev);
692 struct taal_data *td = dev_get_drvdata(&dssdev->dev);
696 for (i = 0; i < ARRAY_SIZE(cabc_modes); i++) {
697 if (sysfs_streq(cabc_modes[i], buf))
701 if (i == ARRAY_SIZE(cabc_modes))
704 mutex_lock(&td->lock);
707 dsi_bus_lock(dssdev);
709 if (!td->cabc_broken) {
710 r = taal_wake_up(dssdev);
714 r = taal_dcs_write_1(td, DCS_WRITE_CABC, i);
719 dsi_bus_unlock(dssdev);
724 mutex_unlock(&td->lock);
728 dsi_bus_unlock(dssdev);
729 mutex_unlock(&td->lock);
733 static ssize_t show_cabc_available_modes(struct device *dev,
734 struct device_attribute *attr,
741 len < PAGE_SIZE && i < ARRAY_SIZE(cabc_modes); i++)
742 len += snprintf(&buf[len], PAGE_SIZE - len, "%s%s%s",
743 i ? " " : "", cabc_modes[i],
744 i == ARRAY_SIZE(cabc_modes) - 1 ? "\n" : "");
746 return len < PAGE_SIZE ? len : PAGE_SIZE - 1;
749 static ssize_t taal_store_esd_interval(struct device *dev,
750 struct device_attribute *attr,
751 const char *buf, size_t count)
753 struct omap_dss_device *dssdev = to_dss_device(dev);
754 struct taal_data *td = dev_get_drvdata(&dssdev->dev);
759 r = strict_strtoul(buf, 10, &t);
763 mutex_lock(&td->lock);
764 taal_cancel_esd_work(dssdev);
765 td->esd_interval = t;
767 taal_queue_esd_work(dssdev);
768 mutex_unlock(&td->lock);
773 static ssize_t taal_show_esd_interval(struct device *dev,
774 struct device_attribute *attr,
777 struct omap_dss_device *dssdev = to_dss_device(dev);
778 struct taal_data *td = dev_get_drvdata(&dssdev->dev);
781 mutex_lock(&td->lock);
782 t = td->esd_interval;
783 mutex_unlock(&td->lock);
785 return snprintf(buf, PAGE_SIZE, "%u\n", t);
788 static ssize_t taal_store_ulps(struct device *dev,
789 struct device_attribute *attr,
790 const char *buf, size_t count)
792 struct omap_dss_device *dssdev = to_dss_device(dev);
793 struct taal_data *td = dev_get_drvdata(&dssdev->dev);
797 r = strict_strtoul(buf, 10, &t);
801 mutex_lock(&td->lock);
804 dsi_bus_lock(dssdev);
807 r = taal_enter_ulps(dssdev);
809 r = taal_wake_up(dssdev);
811 dsi_bus_unlock(dssdev);
814 mutex_unlock(&td->lock);
822 static ssize_t taal_show_ulps(struct device *dev,
823 struct device_attribute *attr,
826 struct omap_dss_device *dssdev = to_dss_device(dev);
827 struct taal_data *td = dev_get_drvdata(&dssdev->dev);
830 mutex_lock(&td->lock);
831 t = td->ulps_enabled;
832 mutex_unlock(&td->lock);
834 return snprintf(buf, PAGE_SIZE, "%u\n", t);
837 static ssize_t taal_store_ulps_timeout(struct device *dev,
838 struct device_attribute *attr,
839 const char *buf, size_t count)
841 struct omap_dss_device *dssdev = to_dss_device(dev);
842 struct taal_data *td = dev_get_drvdata(&dssdev->dev);
846 r = strict_strtoul(buf, 10, &t);
850 mutex_lock(&td->lock);
851 td->ulps_timeout = t;
854 /* taal_wake_up will restart the timer */
855 dsi_bus_lock(dssdev);
856 r = taal_wake_up(dssdev);
857 dsi_bus_unlock(dssdev);
860 mutex_unlock(&td->lock);
868 static ssize_t taal_show_ulps_timeout(struct device *dev,
869 struct device_attribute *attr,
872 struct omap_dss_device *dssdev = to_dss_device(dev);
873 struct taal_data *td = dev_get_drvdata(&dssdev->dev);
876 mutex_lock(&td->lock);
877 t = td->ulps_timeout;
878 mutex_unlock(&td->lock);
880 return snprintf(buf, PAGE_SIZE, "%u\n", t);
883 static DEVICE_ATTR(num_dsi_errors, S_IRUGO, taal_num_errors_show, NULL);
884 static DEVICE_ATTR(hw_revision, S_IRUGO, taal_hw_revision_show, NULL);
885 static DEVICE_ATTR(cabc_mode, S_IRUGO | S_IWUSR,
886 show_cabc_mode, store_cabc_mode);
887 static DEVICE_ATTR(cabc_available_modes, S_IRUGO,
888 show_cabc_available_modes, NULL);
889 static DEVICE_ATTR(esd_interval, S_IRUGO | S_IWUSR,
890 taal_show_esd_interval, taal_store_esd_interval);
891 static DEVICE_ATTR(ulps, S_IRUGO | S_IWUSR,
892 taal_show_ulps, taal_store_ulps);
893 static DEVICE_ATTR(ulps_timeout, S_IRUGO | S_IWUSR,
894 taal_show_ulps_timeout, taal_store_ulps_timeout);
896 static struct attribute *taal_attrs[] = {
897 &dev_attr_num_dsi_errors.attr,
898 &dev_attr_hw_revision.attr,
899 &dev_attr_cabc_mode.attr,
900 &dev_attr_cabc_available_modes.attr,
901 &dev_attr_esd_interval.attr,
903 &dev_attr_ulps_timeout.attr,
907 static struct attribute_group taal_attr_group = {
911 static void taal_hw_reset(struct omap_dss_device *dssdev)
913 struct taal_data *td = dev_get_drvdata(&dssdev->dev);
914 struct nokia_dsi_panel_data *panel_data = get_panel_data(dssdev);
916 if (panel_data->reset_gpio == -1)
919 gpio_set_value(panel_data->reset_gpio, 1);
920 if (td->panel_config->reset_sequence.high)
921 udelay(td->panel_config->reset_sequence.high);
922 /* reset the panel */
923 gpio_set_value(panel_data->reset_gpio, 0);
925 if (td->panel_config->reset_sequence.low)
926 udelay(td->panel_config->reset_sequence.low);
927 gpio_set_value(panel_data->reset_gpio, 1);
928 /* wait after releasing reset */
929 if (td->panel_config->sleep.hw_reset)
930 msleep(td->panel_config->sleep.hw_reset);
933 static int taal_probe(struct omap_dss_device *dssdev)
935 struct backlight_properties props;
936 struct taal_data *td;
937 struct backlight_device *bldev = NULL;
938 struct nokia_dsi_panel_data *panel_data = get_panel_data(dssdev);
939 struct panel_config *panel_config = NULL;
942 dev_dbg(&dssdev->dev, "probe\n");
944 if (!panel_data || !panel_data->name) {
949 for (i = 0; i < ARRAY_SIZE(panel_configs); i++) {
950 if (strcmp(panel_data->name, panel_configs[i].name) == 0) {
951 panel_config = &panel_configs[i];
961 dssdev->panel.config = OMAP_DSS_LCD_TFT;
962 dssdev->panel.timings = panel_config->timings;
963 dssdev->panel.dsi_pix_fmt = OMAP_DSS_DSI_FMT_RGB888;
965 td = kzalloc(sizeof(*td), GFP_KERNEL);
971 td->panel_config = panel_config;
972 td->esd_interval = panel_data->esd_interval;
973 td->ulps_enabled = false;
974 td->ulps_timeout = panel_data->ulps_timeout;
976 mutex_init(&td->lock);
978 atomic_set(&td->do_update, 0);
980 r = init_regulators(dssdev, panel_config->regulators,
981 panel_config->num_regulators);
985 td->workqueue = create_singlethread_workqueue("taal_esd");
986 if (td->workqueue == NULL) {
987 dev_err(&dssdev->dev, "can't create ESD workqueue\n");
991 INIT_DELAYED_WORK_DEFERRABLE(&td->esd_work, taal_esd_work);
992 INIT_DELAYED_WORK(&td->ulps_work, taal_ulps_work);
994 dev_set_drvdata(&dssdev->dev, td);
996 taal_hw_reset(dssdev);
998 if (panel_data->use_dsi_backlight) {
999 memset(&props, 0, sizeof(struct backlight_properties));
1000 props.max_brightness = 255;
1002 props.type = BACKLIGHT_RAW;
1003 bldev = backlight_device_register(dev_name(&dssdev->dev),
1004 &dssdev->dev, dssdev, &taal_bl_ops, &props);
1005 if (IS_ERR(bldev)) {
1012 bldev->props.fb_blank = FB_BLANK_UNBLANK;
1013 bldev->props.power = FB_BLANK_UNBLANK;
1014 bldev->props.brightness = 255;
1016 taal_bl_update_status(bldev);
1019 if (panel_data->use_ext_te) {
1020 int gpio = panel_data->ext_te_gpio;
1022 r = gpio_request(gpio, "taal irq");
1024 dev_err(&dssdev->dev, "GPIO request failed\n");
1028 gpio_direction_input(gpio);
1030 r = request_irq(gpio_to_irq(gpio), taal_te_isr,
1031 IRQF_TRIGGER_RISING,
1032 "taal vsync", dssdev);
1035 dev_err(&dssdev->dev, "IRQ request failed\n");
1040 INIT_DELAYED_WORK_DEFERRABLE(&td->te_timeout_work,
1041 taal_te_timeout_work_callback);
1043 dev_dbg(&dssdev->dev, "Using GPIO TE\n");
1046 r = omap_dsi_request_vc(dssdev, &td->channel);
1048 dev_err(&dssdev->dev, "failed to get virtual channel\n");
1052 r = omap_dsi_set_vc_id(dssdev, td->channel, TCH);
1054 dev_err(&dssdev->dev, "failed to set VC_ID\n");
1058 r = sysfs_create_group(&dssdev->dev.kobj, &taal_attr_group);
1060 dev_err(&dssdev->dev, "failed to create sysfs files\n");
1067 omap_dsi_release_vc(dssdev, td->channel);
1069 if (panel_data->use_ext_te)
1070 free_irq(gpio_to_irq(panel_data->ext_te_gpio), dssdev);
1072 if (panel_data->use_ext_te)
1073 gpio_free(panel_data->ext_te_gpio);
1076 backlight_device_unregister(bldev);
1078 destroy_workqueue(td->workqueue);
1080 free_regulators(panel_config->regulators, panel_config->num_regulators);
1087 static void __exit taal_remove(struct omap_dss_device *dssdev)
1089 struct taal_data *td = dev_get_drvdata(&dssdev->dev);
1090 struct nokia_dsi_panel_data *panel_data = get_panel_data(dssdev);
1091 struct backlight_device *bldev;
1093 dev_dbg(&dssdev->dev, "remove\n");
1095 sysfs_remove_group(&dssdev->dev.kobj, &taal_attr_group);
1096 omap_dsi_release_vc(dssdev, td->channel);
1098 if (panel_data->use_ext_te) {
1099 int gpio = panel_data->ext_te_gpio;
1100 free_irq(gpio_to_irq(gpio), dssdev);
1105 if (bldev != NULL) {
1106 bldev->props.power = FB_BLANK_POWERDOWN;
1107 taal_bl_update_status(bldev);
1108 backlight_device_unregister(bldev);
1111 taal_cancel_ulps_work(dssdev);
1112 taal_cancel_esd_work(dssdev);
1113 destroy_workqueue(td->workqueue);
1115 /* reset, to be sure that the panel is in a valid state */
1116 taal_hw_reset(dssdev);
1118 free_regulators(td->panel_config->regulators,
1119 td->panel_config->num_regulators);
1124 static int taal_power_on(struct omap_dss_device *dssdev)
1126 struct taal_data *td = dev_get_drvdata(&dssdev->dev);
1130 r = omapdss_dsi_display_enable(dssdev);
1132 dev_err(&dssdev->dev, "failed to enable DSI\n");
1136 taal_hw_reset(dssdev);
1138 omapdss_dsi_vc_enable_hs(dssdev, td->channel, false);
1140 r = taal_sleep_out(td);
1144 r = taal_get_id(td, &id1, &id2, &id3);
1148 /* on early Taal revisions CABC is broken */
1149 if (td->panel_config->type == PANEL_TAAL &&
1150 (id2 == 0x00 || id2 == 0xff || id2 == 0x81))
1151 td->cabc_broken = true;
1153 r = taal_dcs_write_1(td, DCS_BRIGHTNESS, 0xff);
1157 r = taal_dcs_write_1(td, DCS_CTRL_DISPLAY,
1158 (1<<2) | (1<<5)); /* BL | BCTRL */
1162 r = taal_dcs_write_1(td, MIPI_DCS_SET_PIXEL_FORMAT,
1163 MIPI_DCS_PIXEL_FMT_24BIT);
1167 r = taal_set_addr_mode(td, td->rotate, td->mirror);
1171 if (!td->cabc_broken) {
1172 r = taal_dcs_write_1(td, DCS_WRITE_CABC, td->cabc_mode);
1177 r = taal_dcs_write_0(td, MIPI_DCS_SET_DISPLAY_ON);
1181 r = _taal_enable_te(dssdev, td->te_enabled);
1185 r = dsi_enable_video_output(dssdev, td->channel);
1191 if (!td->intro_printed) {
1192 dev_info(&dssdev->dev, "%s panel revision %02x.%02x.%02x\n",
1193 td->panel_config->name, id1, id2, id3);
1194 if (td->cabc_broken)
1195 dev_info(&dssdev->dev,
1196 "old Taal version, CABC disabled\n");
1197 td->intro_printed = true;
1200 omapdss_dsi_vc_enable_hs(dssdev, td->channel, true);
1204 dev_err(&dssdev->dev, "error while enabling panel, issuing HW reset\n");
1206 taal_hw_reset(dssdev);
1208 omapdss_dsi_display_disable(dssdev, true, false);
1213 static void taal_power_off(struct omap_dss_device *dssdev)
1215 struct taal_data *td = dev_get_drvdata(&dssdev->dev);
1218 dsi_disable_video_output(dssdev, td->channel);
1220 r = taal_dcs_write_0(td, MIPI_DCS_SET_DISPLAY_OFF);
1222 r = taal_sleep_in(td);
1225 dev_err(&dssdev->dev,
1226 "error disabling panel, issuing HW reset\n");
1227 taal_hw_reset(dssdev);
1230 omapdss_dsi_display_disable(dssdev, true, false);
1235 static int taal_panel_reset(struct omap_dss_device *dssdev)
1237 dev_err(&dssdev->dev, "performing LCD reset\n");
1239 taal_power_off(dssdev);
1240 taal_hw_reset(dssdev);
1241 return taal_power_on(dssdev);
1244 static int taal_enable(struct omap_dss_device *dssdev)
1246 struct taal_data *td = dev_get_drvdata(&dssdev->dev);
1249 dev_dbg(&dssdev->dev, "enable\n");
1251 mutex_lock(&td->lock);
1253 if (dssdev->state != OMAP_DSS_DISPLAY_DISABLED) {
1258 dsi_bus_lock(dssdev);
1260 r = taal_power_on(dssdev);
1262 dsi_bus_unlock(dssdev);
1267 taal_queue_esd_work(dssdev);
1269 dssdev->state = OMAP_DSS_DISPLAY_ACTIVE;
1271 mutex_unlock(&td->lock);
1275 dev_dbg(&dssdev->dev, "enable failed\n");
1276 mutex_unlock(&td->lock);
1280 static void taal_disable(struct omap_dss_device *dssdev)
1282 struct taal_data *td = dev_get_drvdata(&dssdev->dev);
1284 dev_dbg(&dssdev->dev, "disable\n");
1286 mutex_lock(&td->lock);
1288 taal_cancel_ulps_work(dssdev);
1289 taal_cancel_esd_work(dssdev);
1291 dsi_bus_lock(dssdev);
1293 if (dssdev->state == OMAP_DSS_DISPLAY_ACTIVE) {
1296 r = taal_wake_up(dssdev);
1298 taal_power_off(dssdev);
1301 dsi_bus_unlock(dssdev);
1303 dssdev->state = OMAP_DSS_DISPLAY_DISABLED;
1305 mutex_unlock(&td->lock);
1308 static int taal_suspend(struct omap_dss_device *dssdev)
1310 struct taal_data *td = dev_get_drvdata(&dssdev->dev);
1313 dev_dbg(&dssdev->dev, "suspend\n");
1315 mutex_lock(&td->lock);
1317 if (dssdev->state != OMAP_DSS_DISPLAY_ACTIVE) {
1322 taal_cancel_ulps_work(dssdev);
1323 taal_cancel_esd_work(dssdev);
1325 dsi_bus_lock(dssdev);
1327 r = taal_wake_up(dssdev);
1329 taal_power_off(dssdev);
1331 dsi_bus_unlock(dssdev);
1333 dssdev->state = OMAP_DSS_DISPLAY_SUSPENDED;
1335 mutex_unlock(&td->lock);
1339 mutex_unlock(&td->lock);
1343 static int taal_resume(struct omap_dss_device *dssdev)
1345 struct taal_data *td = dev_get_drvdata(&dssdev->dev);
1348 dev_dbg(&dssdev->dev, "resume\n");
1350 mutex_lock(&td->lock);
1352 if (dssdev->state != OMAP_DSS_DISPLAY_SUSPENDED) {
1357 dsi_bus_lock(dssdev);
1359 r = taal_power_on(dssdev);
1361 dsi_bus_unlock(dssdev);
1364 dssdev->state = OMAP_DSS_DISPLAY_DISABLED;
1366 dssdev->state = OMAP_DSS_DISPLAY_ACTIVE;
1367 taal_queue_esd_work(dssdev);
1370 mutex_unlock(&td->lock);
1374 mutex_unlock(&td->lock);
1378 static void taal_framedone_cb(int err, void *data)
1380 struct omap_dss_device *dssdev = data;
1381 dev_dbg(&dssdev->dev, "framedone, err %d\n", err);
1382 dsi_bus_unlock(dssdev);
1385 static irqreturn_t taal_te_isr(int irq, void *data)
1387 struct omap_dss_device *dssdev = data;
1388 struct taal_data *td = dev_get_drvdata(&dssdev->dev);
1392 old = atomic_cmpxchg(&td->do_update, 1, 0);
1395 cancel_delayed_work(&td->te_timeout_work);
1397 r = omap_dsi_update(dssdev, td->channel, taal_framedone_cb,
1405 dev_err(&dssdev->dev, "start update failed\n");
1406 dsi_bus_unlock(dssdev);
1410 static void taal_te_timeout_work_callback(struct work_struct *work)
1412 struct taal_data *td = container_of(work, struct taal_data,
1413 te_timeout_work.work);
1414 struct omap_dss_device *dssdev = td->dssdev;
1416 dev_err(&dssdev->dev, "TE not received for 250ms!\n");
1418 atomic_set(&td->do_update, 0);
1419 dsi_bus_unlock(dssdev);
1422 static int taal_update(struct omap_dss_device *dssdev,
1423 u16 x, u16 y, u16 w, u16 h)
1425 struct taal_data *td = dev_get_drvdata(&dssdev->dev);
1426 struct nokia_dsi_panel_data *panel_data = get_panel_data(dssdev);
1429 dev_dbg(&dssdev->dev, "update %d, %d, %d x %d\n", x, y, w, h);
1431 mutex_lock(&td->lock);
1432 dsi_bus_lock(dssdev);
1434 r = taal_wake_up(dssdev);
1443 /* XXX no need to send this every frame, but dsi break if not done */
1444 r = taal_set_update_window(td, 0, 0,
1445 td->panel_config->timings.x_res,
1446 td->panel_config->timings.y_res);
1450 if (td->te_enabled && panel_data->use_ext_te) {
1451 schedule_delayed_work(&td->te_timeout_work,
1452 msecs_to_jiffies(250));
1453 atomic_set(&td->do_update, 1);
1455 r = omap_dsi_update(dssdev, td->channel, taal_framedone_cb,
1461 /* note: no bus_unlock here. unlock is in framedone_cb */
1462 mutex_unlock(&td->lock);
1465 dsi_bus_unlock(dssdev);
1466 mutex_unlock(&td->lock);
1470 static int taal_sync(struct omap_dss_device *dssdev)
1472 struct taal_data *td = dev_get_drvdata(&dssdev->dev);
1474 dev_dbg(&dssdev->dev, "sync\n");
1476 mutex_lock(&td->lock);
1477 dsi_bus_lock(dssdev);
1478 dsi_bus_unlock(dssdev);
1479 mutex_unlock(&td->lock);
1481 dev_dbg(&dssdev->dev, "sync done\n");
1486 static int _taal_enable_te(struct omap_dss_device *dssdev, bool enable)
1488 struct taal_data *td = dev_get_drvdata(&dssdev->dev);
1489 struct nokia_dsi_panel_data *panel_data = get_panel_data(dssdev);
1493 r = taal_dcs_write_1(td, MIPI_DCS_SET_TEAR_ON, 0);
1495 r = taal_dcs_write_0(td, MIPI_DCS_SET_TEAR_OFF);
1497 if (!panel_data->use_ext_te)
1498 omapdss_dsi_enable_te(dssdev, enable);
1500 if (td->panel_config->sleep.enable_te)
1501 msleep(td->panel_config->sleep.enable_te);
1506 static int taal_enable_te(struct omap_dss_device *dssdev, bool enable)
1508 struct taal_data *td = dev_get_drvdata(&dssdev->dev);
1511 mutex_lock(&td->lock);
1513 if (td->te_enabled == enable)
1516 dsi_bus_lock(dssdev);
1519 r = taal_wake_up(dssdev);
1523 r = _taal_enable_te(dssdev, enable);
1528 td->te_enabled = enable;
1530 dsi_bus_unlock(dssdev);
1532 mutex_unlock(&td->lock);
1536 dsi_bus_unlock(dssdev);
1537 mutex_unlock(&td->lock);
1542 static int taal_get_te(struct omap_dss_device *dssdev)
1544 struct taal_data *td = dev_get_drvdata(&dssdev->dev);
1547 mutex_lock(&td->lock);
1549 mutex_unlock(&td->lock);
1554 static int taal_rotate(struct omap_dss_device *dssdev, u8 rotate)
1556 struct taal_data *td = dev_get_drvdata(&dssdev->dev);
1559 dev_dbg(&dssdev->dev, "rotate %d\n", rotate);
1561 mutex_lock(&td->lock);
1563 if (td->rotate == rotate)
1566 dsi_bus_lock(dssdev);
1569 r = taal_wake_up(dssdev);
1573 r = taal_set_addr_mode(td, rotate, td->mirror);
1578 td->rotate = rotate;
1580 dsi_bus_unlock(dssdev);
1582 mutex_unlock(&td->lock);
1585 dsi_bus_unlock(dssdev);
1586 mutex_unlock(&td->lock);
1590 static u8 taal_get_rotate(struct omap_dss_device *dssdev)
1592 struct taal_data *td = dev_get_drvdata(&dssdev->dev);
1595 mutex_lock(&td->lock);
1597 mutex_unlock(&td->lock);
1602 static int taal_mirror(struct omap_dss_device *dssdev, bool enable)
1604 struct taal_data *td = dev_get_drvdata(&dssdev->dev);
1607 dev_dbg(&dssdev->dev, "mirror %d\n", enable);
1609 mutex_lock(&td->lock);
1611 if (td->mirror == enable)
1614 dsi_bus_lock(dssdev);
1616 r = taal_wake_up(dssdev);
1620 r = taal_set_addr_mode(td, td->rotate, enable);
1625 td->mirror = enable;
1627 dsi_bus_unlock(dssdev);
1629 mutex_unlock(&td->lock);
1632 dsi_bus_unlock(dssdev);
1633 mutex_unlock(&td->lock);
1637 static bool taal_get_mirror(struct omap_dss_device *dssdev)
1639 struct taal_data *td = dev_get_drvdata(&dssdev->dev);
1642 mutex_lock(&td->lock);
1644 mutex_unlock(&td->lock);
1649 static int taal_run_test(struct omap_dss_device *dssdev, int test_num)
1651 struct taal_data *td = dev_get_drvdata(&dssdev->dev);
1655 mutex_lock(&td->lock);
1662 dsi_bus_lock(dssdev);
1664 r = taal_wake_up(dssdev);
1668 r = taal_dcs_read_1(td, DCS_GET_ID1, &id1);
1671 r = taal_dcs_read_1(td, DCS_GET_ID2, &id2);
1674 r = taal_dcs_read_1(td, DCS_GET_ID3, &id3);
1678 dsi_bus_unlock(dssdev);
1679 mutex_unlock(&td->lock);
1682 dsi_bus_unlock(dssdev);
1684 mutex_unlock(&td->lock);
1688 static int taal_memory_read(struct omap_dss_device *dssdev,
1689 void *buf, size_t size,
1690 u16 x, u16 y, u16 w, u16 h)
1695 unsigned buf_used = 0;
1696 struct taal_data *td = dev_get_drvdata(&dssdev->dev);
1698 if (size < w * h * 3)
1701 mutex_lock(&td->lock);
1708 size = min(w * h * 3,
1709 dssdev->panel.timings.x_res *
1710 dssdev->panel.timings.y_res * 3);
1712 dsi_bus_lock(dssdev);
1714 r = taal_wake_up(dssdev);
1718 /* plen 1 or 2 goes into short packet. until checksum error is fixed,
1719 * use short packets. plen 32 works, but bigger packets seem to cause
1726 taal_set_update_window(td, x, y, w, h);
1728 r = dsi_vc_set_max_rx_packet_size(dssdev, td->channel, plen);
1732 while (buf_used < size) {
1733 u8 dcs_cmd = first ? 0x2e : 0x3e;
1736 r = dsi_vc_dcs_read(dssdev, td->channel, dcs_cmd,
1737 buf + buf_used, size - buf_used);
1740 dev_err(&dssdev->dev, "read error\n");
1747 dev_err(&dssdev->dev, "short read\n");
1751 if (signal_pending(current)) {
1752 dev_err(&dssdev->dev, "signal pending, "
1753 "aborting memory read\n");
1762 dsi_vc_set_max_rx_packet_size(dssdev, td->channel, 1);
1764 dsi_bus_unlock(dssdev);
1766 mutex_unlock(&td->lock);
1770 static void taal_ulps_work(struct work_struct *work)
1772 struct taal_data *td = container_of(work, struct taal_data,
1774 struct omap_dss_device *dssdev = td->dssdev;
1776 mutex_lock(&td->lock);
1778 if (dssdev->state != OMAP_DSS_DISPLAY_ACTIVE || !td->enabled) {
1779 mutex_unlock(&td->lock);
1783 dsi_bus_lock(dssdev);
1785 taal_enter_ulps(dssdev);
1787 dsi_bus_unlock(dssdev);
1788 mutex_unlock(&td->lock);
1791 static void taal_esd_work(struct work_struct *work)
1793 struct taal_data *td = container_of(work, struct taal_data,
1795 struct omap_dss_device *dssdev = td->dssdev;
1796 struct nokia_dsi_panel_data *panel_data = get_panel_data(dssdev);
1800 mutex_lock(&td->lock);
1803 mutex_unlock(&td->lock);
1807 dsi_bus_lock(dssdev);
1809 r = taal_wake_up(dssdev);
1811 dev_err(&dssdev->dev, "failed to exit ULPS\n");
1815 r = taal_dcs_read_1(td, MIPI_DCS_GET_DIAGNOSTIC_RESULT, &state1);
1817 dev_err(&dssdev->dev, "failed to read Taal status\n");
1821 /* Run self diagnostics */
1822 r = taal_sleep_out(td);
1824 dev_err(&dssdev->dev, "failed to run Taal self-diagnostics\n");
1828 r = taal_dcs_read_1(td, MIPI_DCS_GET_DIAGNOSTIC_RESULT, &state2);
1830 dev_err(&dssdev->dev, "failed to read Taal status\n");
1834 /* Each sleep out command will trigger a self diagnostic and flip
1835 * Bit6 if the test passes.
1837 if (!((state1 ^ state2) & (1 << 6))) {
1838 dev_err(&dssdev->dev, "LCD self diagnostics failed\n");
1841 /* Self-diagnostics result is also shown on TE GPIO line. We need
1842 * to re-enable TE after self diagnostics */
1843 if (td->te_enabled && panel_data->use_ext_te) {
1844 r = taal_dcs_write_1(td, MIPI_DCS_SET_TEAR_ON, 0);
1849 dsi_bus_unlock(dssdev);
1851 taal_queue_esd_work(dssdev);
1853 mutex_unlock(&td->lock);
1856 dev_err(&dssdev->dev, "performing LCD reset\n");
1858 taal_panel_reset(dssdev);
1860 dsi_bus_unlock(dssdev);
1862 taal_queue_esd_work(dssdev);
1864 mutex_unlock(&td->lock);
1867 static struct omap_dss_driver taal_driver = {
1868 .probe = taal_probe,
1869 .remove = __exit_p(taal_remove),
1871 .enable = taal_enable,
1872 .disable = taal_disable,
1873 .suspend = taal_suspend,
1874 .resume = taal_resume,
1876 .update = taal_update,
1879 .get_resolution = taal_get_resolution,
1880 .get_recommended_bpp = omapdss_default_get_recommended_bpp,
1882 .enable_te = taal_enable_te,
1883 .get_te = taal_get_te,
1885 .set_rotate = taal_rotate,
1886 .get_rotate = taal_get_rotate,
1887 .set_mirror = taal_mirror,
1888 .get_mirror = taal_get_mirror,
1889 .run_test = taal_run_test,
1890 .memory_read = taal_memory_read,
1892 .get_timings = taal_get_timings,
1896 .owner = THIS_MODULE,
1900 static int __init taal_init(void)
1902 omap_dss_register_driver(&taal_driver);
1907 static void __exit taal_exit(void)
1909 omap_dss_unregister_driver(&taal_driver);
1912 module_init(taal_init);
1913 module_exit(taal_exit);
1915 MODULE_AUTHOR("Tomi Valkeinen <tomi.valkeinen@nokia.com>");
1916 MODULE_DESCRIPTION("Taal Driver");
1917 MODULE_LICENSE("GPL");