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;
209 struct delayed_work te_timeout_work;
216 struct workqueue_struct *workqueue;
218 struct delayed_work esd_work;
219 unsigned esd_interval;
222 unsigned ulps_timeout;
223 struct delayed_work ulps_work;
225 struct panel_config *panel_config;
228 static inline struct nokia_dsi_panel_data
229 *get_panel_data(const struct omap_dss_device *dssdev)
231 return (struct nokia_dsi_panel_data *) dssdev->data;
234 static void taal_esd_work(struct work_struct *work);
235 static void taal_ulps_work(struct work_struct *work);
237 static void hw_guard_start(struct taal_data *td, int guard_msec)
239 td->hw_guard_wait = msecs_to_jiffies(guard_msec);
240 td->hw_guard_end = jiffies + td->hw_guard_wait;
243 static void hw_guard_wait(struct taal_data *td)
245 unsigned long wait = td->hw_guard_end - jiffies;
247 if ((long)wait > 0 && wait <= td->hw_guard_wait) {
248 set_current_state(TASK_UNINTERRUPTIBLE);
249 schedule_timeout(wait);
253 static int taal_dcs_read_1(struct taal_data *td, u8 dcs_cmd, u8 *data)
258 r = dsi_vc_dcs_read(td->dssdev, td->channel, dcs_cmd, buf, 1);
268 static int taal_dcs_write_0(struct taal_data *td, u8 dcs_cmd)
270 return dsi_vc_dcs_write(td->dssdev, td->channel, &dcs_cmd, 1);
273 static int taal_dcs_write_1(struct taal_data *td, u8 dcs_cmd, u8 param)
278 return dsi_vc_dcs_write(td->dssdev, td->channel, buf, 2);
281 static int taal_sleep_in(struct taal_data *td)
289 cmd = MIPI_DCS_ENTER_SLEEP_MODE;
290 r = dsi_vc_dcs_write_nosync(td->dssdev, td->channel, &cmd, 1);
294 hw_guard_start(td, 120);
296 if (td->panel_config->sleep.sleep_in)
297 msleep(td->panel_config->sleep.sleep_in);
302 static int taal_sleep_out(struct taal_data *td)
308 r = taal_dcs_write_0(td, MIPI_DCS_EXIT_SLEEP_MODE);
312 hw_guard_start(td, 120);
314 if (td->panel_config->sleep.sleep_out)
315 msleep(td->panel_config->sleep.sleep_out);
320 static int taal_get_id(struct taal_data *td, u8 *id1, u8 *id2, u8 *id3)
324 r = taal_dcs_read_1(td, DCS_GET_ID1, id1);
327 r = taal_dcs_read_1(td, DCS_GET_ID2, id2);
330 r = taal_dcs_read_1(td, DCS_GET_ID3, id3);
337 static int taal_set_addr_mode(struct taal_data *td, u8 rotate, bool mirror)
343 r = taal_dcs_read_1(td, MIPI_DCS_GET_ADDRESS_MODE, &mode);
374 mode &= ~((1<<7) | (1<<6) | (1<<5));
375 mode |= (b7 << 7) | (b6 << 6) | (b5 << 5);
377 return taal_dcs_write_1(td, MIPI_DCS_SET_ADDRESS_MODE, mode);
380 static int taal_set_update_window(struct taal_data *td,
381 u16 x, u16 y, u16 w, u16 h)
390 buf[0] = MIPI_DCS_SET_COLUMN_ADDRESS;
391 buf[1] = (x1 >> 8) & 0xff;
392 buf[2] = (x1 >> 0) & 0xff;
393 buf[3] = (x2 >> 8) & 0xff;
394 buf[4] = (x2 >> 0) & 0xff;
396 r = dsi_vc_dcs_write_nosync(td->dssdev, td->channel, buf, sizeof(buf));
400 buf[0] = MIPI_DCS_SET_PAGE_ADDRESS;
401 buf[1] = (y1 >> 8) & 0xff;
402 buf[2] = (y1 >> 0) & 0xff;
403 buf[3] = (y2 >> 8) & 0xff;
404 buf[4] = (y2 >> 0) & 0xff;
406 r = dsi_vc_dcs_write_nosync(td->dssdev, td->channel, buf, sizeof(buf));
410 dsi_vc_send_bta_sync(td->dssdev, td->channel);
415 static void taal_queue_esd_work(struct omap_dss_device *dssdev)
417 struct taal_data *td = dev_get_drvdata(&dssdev->dev);
419 if (td->esd_interval > 0)
420 queue_delayed_work(td->workqueue, &td->esd_work,
421 msecs_to_jiffies(td->esd_interval));
424 static void taal_cancel_esd_work(struct omap_dss_device *dssdev)
426 struct taal_data *td = dev_get_drvdata(&dssdev->dev);
428 cancel_delayed_work(&td->esd_work);
431 static void taal_queue_ulps_work(struct omap_dss_device *dssdev)
433 struct taal_data *td = dev_get_drvdata(&dssdev->dev);
435 if (td->ulps_timeout > 0)
436 queue_delayed_work(td->workqueue, &td->ulps_work,
437 msecs_to_jiffies(td->ulps_timeout));
440 static void taal_cancel_ulps_work(struct omap_dss_device *dssdev)
442 struct taal_data *td = dev_get_drvdata(&dssdev->dev);
444 cancel_delayed_work(&td->ulps_work);
447 static int taal_enter_ulps(struct omap_dss_device *dssdev)
449 struct taal_data *td = dev_get_drvdata(&dssdev->dev);
450 struct nokia_dsi_panel_data *panel_data = get_panel_data(dssdev);
453 if (td->ulps_enabled)
456 taal_cancel_ulps_work(dssdev);
458 r = _taal_enable_te(dssdev, false);
462 disable_irq(gpio_to_irq(panel_data->ext_te_gpio));
464 omapdss_dsi_display_disable(dssdev, false, true);
466 td->ulps_enabled = true;
471 dev_err(&dssdev->dev, "enter ULPS failed");
472 taal_panel_reset(dssdev);
474 td->ulps_enabled = false;
476 taal_queue_ulps_work(dssdev);
481 static int taal_exit_ulps(struct omap_dss_device *dssdev)
483 struct taal_data *td = dev_get_drvdata(&dssdev->dev);
484 struct nokia_dsi_panel_data *panel_data = get_panel_data(dssdev);
487 if (!td->ulps_enabled)
490 r = omapdss_dsi_display_enable(dssdev);
492 dev_err(&dssdev->dev, "failed to enable DSI\n");
496 omapdss_dsi_vc_enable_hs(dssdev, td->channel, true);
498 r = _taal_enable_te(dssdev, true);
500 dev_err(&dssdev->dev, "failed to re-enable TE");
504 enable_irq(gpio_to_irq(panel_data->ext_te_gpio));
506 taal_queue_ulps_work(dssdev);
508 td->ulps_enabled = false;
513 dev_err(&dssdev->dev, "failed to exit ULPS");
515 r = taal_panel_reset(dssdev);
517 enable_irq(gpio_to_irq(panel_data->ext_te_gpio));
518 td->ulps_enabled = false;
521 taal_queue_ulps_work(dssdev);
526 static int taal_wake_up(struct omap_dss_device *dssdev)
528 struct taal_data *td = dev_get_drvdata(&dssdev->dev);
530 if (td->ulps_enabled)
531 return taal_exit_ulps(dssdev);
533 taal_cancel_ulps_work(dssdev);
534 taal_queue_ulps_work(dssdev);
538 static int taal_bl_update_status(struct backlight_device *dev)
540 struct omap_dss_device *dssdev = dev_get_drvdata(&dev->dev);
541 struct taal_data *td = dev_get_drvdata(&dssdev->dev);
545 if (dev->props.fb_blank == FB_BLANK_UNBLANK &&
546 dev->props.power == FB_BLANK_UNBLANK)
547 level = dev->props.brightness;
551 dev_dbg(&dssdev->dev, "update brightness to %d\n", level);
553 mutex_lock(&td->lock);
556 dsi_bus_lock(dssdev);
558 r = taal_wake_up(dssdev);
560 r = taal_dcs_write_1(td, DCS_BRIGHTNESS, level);
562 dsi_bus_unlock(dssdev);
567 mutex_unlock(&td->lock);
572 static int taal_bl_get_intensity(struct backlight_device *dev)
574 if (dev->props.fb_blank == FB_BLANK_UNBLANK &&
575 dev->props.power == FB_BLANK_UNBLANK)
576 return dev->props.brightness;
581 static const struct backlight_ops taal_bl_ops = {
582 .get_brightness = taal_bl_get_intensity,
583 .update_status = taal_bl_update_status,
586 static void taal_get_timings(struct omap_dss_device *dssdev,
587 struct omap_video_timings *timings)
589 *timings = dssdev->panel.timings;
592 static void taal_get_resolution(struct omap_dss_device *dssdev,
593 u16 *xres, u16 *yres)
595 struct taal_data *td = dev_get_drvdata(&dssdev->dev);
597 if (td->rotate == 0 || td->rotate == 2) {
598 *xres = dssdev->panel.timings.x_res;
599 *yres = dssdev->panel.timings.y_res;
601 *yres = dssdev->panel.timings.x_res;
602 *xres = dssdev->panel.timings.y_res;
606 static ssize_t taal_num_errors_show(struct device *dev,
607 struct device_attribute *attr, char *buf)
609 struct omap_dss_device *dssdev = to_dss_device(dev);
610 struct taal_data *td = dev_get_drvdata(&dssdev->dev);
614 mutex_lock(&td->lock);
617 dsi_bus_lock(dssdev);
619 r = taal_wake_up(dssdev);
621 r = taal_dcs_read_1(td, DCS_READ_NUM_ERRORS, &errors);
623 dsi_bus_unlock(dssdev);
628 mutex_unlock(&td->lock);
633 return snprintf(buf, PAGE_SIZE, "%d\n", errors);
636 static ssize_t taal_hw_revision_show(struct device *dev,
637 struct device_attribute *attr, char *buf)
639 struct omap_dss_device *dssdev = to_dss_device(dev);
640 struct taal_data *td = dev_get_drvdata(&dssdev->dev);
644 mutex_lock(&td->lock);
647 dsi_bus_lock(dssdev);
649 r = taal_wake_up(dssdev);
651 r = taal_get_id(td, &id1, &id2, &id3);
653 dsi_bus_unlock(dssdev);
658 mutex_unlock(&td->lock);
663 return snprintf(buf, PAGE_SIZE, "%02x.%02x.%02x\n", id1, id2, id3);
666 static const char *cabc_modes[] = {
667 "off", /* used also always when CABC is not supported */
673 static ssize_t show_cabc_mode(struct device *dev,
674 struct device_attribute *attr,
677 struct omap_dss_device *dssdev = to_dss_device(dev);
678 struct taal_data *td = dev_get_drvdata(&dssdev->dev);
679 const char *mode_str;
683 mode = td->cabc_mode;
685 mode_str = "unknown";
686 if (mode >= 0 && mode < ARRAY_SIZE(cabc_modes))
687 mode_str = cabc_modes[mode];
688 len = snprintf(buf, PAGE_SIZE, "%s\n", mode_str);
690 return len < PAGE_SIZE - 1 ? len : PAGE_SIZE - 1;
693 static ssize_t store_cabc_mode(struct device *dev,
694 struct device_attribute *attr,
695 const char *buf, size_t count)
697 struct omap_dss_device *dssdev = to_dss_device(dev);
698 struct taal_data *td = dev_get_drvdata(&dssdev->dev);
702 for (i = 0; i < ARRAY_SIZE(cabc_modes); i++) {
703 if (sysfs_streq(cabc_modes[i], buf))
707 if (i == ARRAY_SIZE(cabc_modes))
710 mutex_lock(&td->lock);
713 dsi_bus_lock(dssdev);
715 if (!td->cabc_broken) {
716 r = taal_wake_up(dssdev);
720 r = taal_dcs_write_1(td, DCS_WRITE_CABC, i);
725 dsi_bus_unlock(dssdev);
730 mutex_unlock(&td->lock);
734 dsi_bus_unlock(dssdev);
735 mutex_unlock(&td->lock);
739 static ssize_t show_cabc_available_modes(struct device *dev,
740 struct device_attribute *attr,
747 len < PAGE_SIZE && i < ARRAY_SIZE(cabc_modes); i++)
748 len += snprintf(&buf[len], PAGE_SIZE - len, "%s%s%s",
749 i ? " " : "", cabc_modes[i],
750 i == ARRAY_SIZE(cabc_modes) - 1 ? "\n" : "");
752 return len < PAGE_SIZE ? len : PAGE_SIZE - 1;
755 static ssize_t taal_store_esd_interval(struct device *dev,
756 struct device_attribute *attr,
757 const char *buf, size_t count)
759 struct omap_dss_device *dssdev = to_dss_device(dev);
760 struct taal_data *td = dev_get_drvdata(&dssdev->dev);
765 r = strict_strtoul(buf, 10, &t);
769 mutex_lock(&td->lock);
770 taal_cancel_esd_work(dssdev);
771 td->esd_interval = t;
773 taal_queue_esd_work(dssdev);
774 mutex_unlock(&td->lock);
779 static ssize_t taal_show_esd_interval(struct device *dev,
780 struct device_attribute *attr,
783 struct omap_dss_device *dssdev = to_dss_device(dev);
784 struct taal_data *td = dev_get_drvdata(&dssdev->dev);
787 mutex_lock(&td->lock);
788 t = td->esd_interval;
789 mutex_unlock(&td->lock);
791 return snprintf(buf, PAGE_SIZE, "%u\n", t);
794 static ssize_t taal_store_ulps(struct device *dev,
795 struct device_attribute *attr,
796 const char *buf, size_t count)
798 struct omap_dss_device *dssdev = to_dss_device(dev);
799 struct taal_data *td = dev_get_drvdata(&dssdev->dev);
803 r = strict_strtoul(buf, 10, &t);
807 mutex_lock(&td->lock);
810 dsi_bus_lock(dssdev);
813 r = taal_enter_ulps(dssdev);
815 r = taal_wake_up(dssdev);
817 dsi_bus_unlock(dssdev);
820 mutex_unlock(&td->lock);
828 static ssize_t taal_show_ulps(struct device *dev,
829 struct device_attribute *attr,
832 struct omap_dss_device *dssdev = to_dss_device(dev);
833 struct taal_data *td = dev_get_drvdata(&dssdev->dev);
836 mutex_lock(&td->lock);
837 t = td->ulps_enabled;
838 mutex_unlock(&td->lock);
840 return snprintf(buf, PAGE_SIZE, "%u\n", t);
843 static ssize_t taal_store_ulps_timeout(struct device *dev,
844 struct device_attribute *attr,
845 const char *buf, size_t count)
847 struct omap_dss_device *dssdev = to_dss_device(dev);
848 struct taal_data *td = dev_get_drvdata(&dssdev->dev);
852 r = strict_strtoul(buf, 10, &t);
856 mutex_lock(&td->lock);
857 td->ulps_timeout = t;
860 /* taal_wake_up will restart the timer */
861 dsi_bus_lock(dssdev);
862 r = taal_wake_up(dssdev);
863 dsi_bus_unlock(dssdev);
866 mutex_unlock(&td->lock);
874 static ssize_t taal_show_ulps_timeout(struct device *dev,
875 struct device_attribute *attr,
878 struct omap_dss_device *dssdev = to_dss_device(dev);
879 struct taal_data *td = dev_get_drvdata(&dssdev->dev);
882 mutex_lock(&td->lock);
883 t = td->ulps_timeout;
884 mutex_unlock(&td->lock);
886 return snprintf(buf, PAGE_SIZE, "%u\n", t);
889 static DEVICE_ATTR(num_dsi_errors, S_IRUGO, taal_num_errors_show, NULL);
890 static DEVICE_ATTR(hw_revision, S_IRUGO, taal_hw_revision_show, NULL);
891 static DEVICE_ATTR(cabc_mode, S_IRUGO | S_IWUSR,
892 show_cabc_mode, store_cabc_mode);
893 static DEVICE_ATTR(cabc_available_modes, S_IRUGO,
894 show_cabc_available_modes, NULL);
895 static DEVICE_ATTR(esd_interval, S_IRUGO | S_IWUSR,
896 taal_show_esd_interval, taal_store_esd_interval);
897 static DEVICE_ATTR(ulps, S_IRUGO | S_IWUSR,
898 taal_show_ulps, taal_store_ulps);
899 static DEVICE_ATTR(ulps_timeout, S_IRUGO | S_IWUSR,
900 taal_show_ulps_timeout, taal_store_ulps_timeout);
902 static struct attribute *taal_attrs[] = {
903 &dev_attr_num_dsi_errors.attr,
904 &dev_attr_hw_revision.attr,
905 &dev_attr_cabc_mode.attr,
906 &dev_attr_cabc_available_modes.attr,
907 &dev_attr_esd_interval.attr,
909 &dev_attr_ulps_timeout.attr,
913 static struct attribute_group taal_attr_group = {
917 static void taal_hw_reset(struct omap_dss_device *dssdev)
919 struct taal_data *td = dev_get_drvdata(&dssdev->dev);
920 struct nokia_dsi_panel_data *panel_data = get_panel_data(dssdev);
922 if (panel_data->reset_gpio == -1)
925 gpio_set_value(panel_data->reset_gpio, 1);
926 if (td->panel_config->reset_sequence.high)
927 udelay(td->panel_config->reset_sequence.high);
928 /* reset the panel */
929 gpio_set_value(panel_data->reset_gpio, 0);
931 if (td->panel_config->reset_sequence.low)
932 udelay(td->panel_config->reset_sequence.low);
933 gpio_set_value(panel_data->reset_gpio, 1);
934 /* wait after releasing reset */
935 if (td->panel_config->sleep.hw_reset)
936 msleep(td->panel_config->sleep.hw_reset);
939 static int taal_probe(struct omap_dss_device *dssdev)
941 struct backlight_properties props;
942 struct taal_data *td;
943 struct backlight_device *bldev = NULL;
944 struct nokia_dsi_panel_data *panel_data = get_panel_data(dssdev);
945 struct panel_config *panel_config = NULL;
948 dev_dbg(&dssdev->dev, "probe\n");
950 if (!panel_data || !panel_data->name) {
955 for (i = 0; i < ARRAY_SIZE(panel_configs); i++) {
956 if (strcmp(panel_data->name, panel_configs[i].name) == 0) {
957 panel_config = &panel_configs[i];
967 dssdev->panel.config = OMAP_DSS_LCD_TFT;
968 dssdev->panel.timings = panel_config->timings;
969 dssdev->panel.dsi_pix_fmt = OMAP_DSS_DSI_FMT_RGB888;
971 td = kzalloc(sizeof(*td), GFP_KERNEL);
977 td->panel_config = panel_config;
978 td->esd_interval = panel_data->esd_interval;
979 td->ulps_enabled = false;
980 td->ulps_timeout = panel_data->ulps_timeout;
982 mutex_init(&td->lock);
984 atomic_set(&td->do_update, 0);
986 r = init_regulators(dssdev, panel_config->regulators,
987 panel_config->num_regulators);
991 td->workqueue = create_singlethread_workqueue("taal_esd");
992 if (td->workqueue == NULL) {
993 dev_err(&dssdev->dev, "can't create ESD workqueue\n");
997 INIT_DELAYED_WORK_DEFERRABLE(&td->esd_work, taal_esd_work);
998 INIT_DELAYED_WORK(&td->ulps_work, taal_ulps_work);
1000 dev_set_drvdata(&dssdev->dev, td);
1002 taal_hw_reset(dssdev);
1004 if (panel_data->use_dsi_backlight) {
1005 memset(&props, 0, sizeof(struct backlight_properties));
1006 props.max_brightness = 255;
1008 props.type = BACKLIGHT_RAW;
1009 bldev = backlight_device_register(dev_name(&dssdev->dev),
1010 &dssdev->dev, dssdev, &taal_bl_ops, &props);
1011 if (IS_ERR(bldev)) {
1018 bldev->props.fb_blank = FB_BLANK_UNBLANK;
1019 bldev->props.power = FB_BLANK_UNBLANK;
1020 bldev->props.brightness = 255;
1022 taal_bl_update_status(bldev);
1025 if (panel_data->use_ext_te) {
1026 int gpio = panel_data->ext_te_gpio;
1028 r = gpio_request(gpio, "taal irq");
1030 dev_err(&dssdev->dev, "GPIO request failed\n");
1034 gpio_direction_input(gpio);
1036 r = request_irq(gpio_to_irq(gpio), taal_te_isr,
1037 IRQF_TRIGGER_RISING,
1038 "taal vsync", dssdev);
1041 dev_err(&dssdev->dev, "IRQ request failed\n");
1046 INIT_DELAYED_WORK_DEFERRABLE(&td->te_timeout_work,
1047 taal_te_timeout_work_callback);
1049 dev_dbg(&dssdev->dev, "Using GPIO TE\n");
1052 r = omap_dsi_request_vc(dssdev, &td->channel);
1054 dev_err(&dssdev->dev, "failed to get virtual channel\n");
1058 r = omap_dsi_set_vc_id(dssdev, td->channel, TCH);
1060 dev_err(&dssdev->dev, "failed to set VC_ID\n");
1064 r = sysfs_create_group(&dssdev->dev.kobj, &taal_attr_group);
1066 dev_err(&dssdev->dev, "failed to create sysfs files\n");
1073 omap_dsi_release_vc(dssdev, td->channel);
1075 if (panel_data->use_ext_te)
1076 free_irq(gpio_to_irq(panel_data->ext_te_gpio), dssdev);
1078 if (panel_data->use_ext_te)
1079 gpio_free(panel_data->ext_te_gpio);
1082 backlight_device_unregister(bldev);
1084 destroy_workqueue(td->workqueue);
1086 free_regulators(panel_config->regulators, panel_config->num_regulators);
1093 static void __exit taal_remove(struct omap_dss_device *dssdev)
1095 struct taal_data *td = dev_get_drvdata(&dssdev->dev);
1096 struct nokia_dsi_panel_data *panel_data = get_panel_data(dssdev);
1097 struct backlight_device *bldev;
1099 dev_dbg(&dssdev->dev, "remove\n");
1101 sysfs_remove_group(&dssdev->dev.kobj, &taal_attr_group);
1102 omap_dsi_release_vc(dssdev, td->channel);
1104 if (panel_data->use_ext_te) {
1105 int gpio = panel_data->ext_te_gpio;
1106 free_irq(gpio_to_irq(gpio), dssdev);
1111 if (bldev != NULL) {
1112 bldev->props.power = FB_BLANK_POWERDOWN;
1113 taal_bl_update_status(bldev);
1114 backlight_device_unregister(bldev);
1117 taal_cancel_ulps_work(dssdev);
1118 taal_cancel_esd_work(dssdev);
1119 destroy_workqueue(td->workqueue);
1121 /* reset, to be sure that the panel is in a valid state */
1122 taal_hw_reset(dssdev);
1124 free_regulators(td->panel_config->regulators,
1125 td->panel_config->num_regulators);
1130 static int taal_power_on(struct omap_dss_device *dssdev)
1132 struct taal_data *td = dev_get_drvdata(&dssdev->dev);
1136 r = omapdss_dsi_display_enable(dssdev);
1138 dev_err(&dssdev->dev, "failed to enable DSI\n");
1142 taal_hw_reset(dssdev);
1144 omapdss_dsi_vc_enable_hs(dssdev, td->channel, false);
1146 r = taal_sleep_out(td);
1150 r = taal_get_id(td, &id1, &id2, &id3);
1154 /* on early Taal revisions CABC is broken */
1155 if (td->panel_config->type == PANEL_TAAL &&
1156 (id2 == 0x00 || id2 == 0xff || id2 == 0x81))
1157 td->cabc_broken = true;
1159 r = taal_dcs_write_1(td, DCS_BRIGHTNESS, 0xff);
1163 r = taal_dcs_write_1(td, DCS_CTRL_DISPLAY,
1164 (1<<2) | (1<<5)); /* BL | BCTRL */
1168 r = taal_dcs_write_1(td, MIPI_DCS_SET_PIXEL_FORMAT,
1169 MIPI_DCS_PIXEL_FMT_24BIT);
1173 r = taal_set_addr_mode(td, td->rotate, td->mirror);
1177 if (!td->cabc_broken) {
1178 r = taal_dcs_write_1(td, DCS_WRITE_CABC, td->cabc_mode);
1183 r = taal_dcs_write_0(td, MIPI_DCS_SET_DISPLAY_ON);
1187 r = _taal_enable_te(dssdev, td->te_enabled);
1193 if (!td->intro_printed) {
1194 dev_info(&dssdev->dev, "%s panel revision %02x.%02x.%02x\n",
1195 td->panel_config->name, id1, id2, id3);
1196 if (td->cabc_broken)
1197 dev_info(&dssdev->dev,
1198 "old Taal version, CABC disabled\n");
1199 td->intro_printed = true;
1202 omapdss_dsi_vc_enable_hs(dssdev, td->channel, true);
1206 dev_err(&dssdev->dev, "error while enabling panel, issuing HW reset\n");
1208 taal_hw_reset(dssdev);
1210 omapdss_dsi_display_disable(dssdev, true, false);
1215 static void taal_power_off(struct omap_dss_device *dssdev)
1217 struct taal_data *td = dev_get_drvdata(&dssdev->dev);
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,
1398 td->update_region.x,
1399 td->update_region.y,
1400 td->update_region.w,
1401 td->update_region.h,
1402 taal_framedone_cb, dssdev);
1409 dev_err(&dssdev->dev, "start update failed\n");
1410 dsi_bus_unlock(dssdev);
1414 static void taal_te_timeout_work_callback(struct work_struct *work)
1416 struct taal_data *td = container_of(work, struct taal_data,
1417 te_timeout_work.work);
1418 struct omap_dss_device *dssdev = td->dssdev;
1420 dev_err(&dssdev->dev, "TE not received for 250ms!\n");
1422 atomic_set(&td->do_update, 0);
1423 dsi_bus_unlock(dssdev);
1426 static int taal_update(struct omap_dss_device *dssdev,
1427 u16 x, u16 y, u16 w, u16 h)
1429 struct taal_data *td = dev_get_drvdata(&dssdev->dev);
1430 struct nokia_dsi_panel_data *panel_data = get_panel_data(dssdev);
1433 dev_dbg(&dssdev->dev, "update %d, %d, %d x %d\n", x, y, w, h);
1435 mutex_lock(&td->lock);
1436 dsi_bus_lock(dssdev);
1438 r = taal_wake_up(dssdev);
1447 r = omap_dsi_prepare_update(dssdev, &x, &y, &w, &h, true);
1451 r = taal_set_update_window(td, x, y, w, h);
1455 if (td->te_enabled && panel_data->use_ext_te) {
1456 td->update_region.x = x;
1457 td->update_region.y = y;
1458 td->update_region.w = w;
1459 td->update_region.h = h;
1461 schedule_delayed_work(&td->te_timeout_work,
1462 msecs_to_jiffies(250));
1463 atomic_set(&td->do_update, 1);
1465 r = omap_dsi_update(dssdev, td->channel, x, y, w, h,
1466 taal_framedone_cb, dssdev);
1471 /* note: no bus_unlock here. unlock is in framedone_cb */
1472 mutex_unlock(&td->lock);
1475 dsi_bus_unlock(dssdev);
1476 mutex_unlock(&td->lock);
1480 static int taal_sync(struct omap_dss_device *dssdev)
1482 struct taal_data *td = dev_get_drvdata(&dssdev->dev);
1484 dev_dbg(&dssdev->dev, "sync\n");
1486 mutex_lock(&td->lock);
1487 dsi_bus_lock(dssdev);
1488 dsi_bus_unlock(dssdev);
1489 mutex_unlock(&td->lock);
1491 dev_dbg(&dssdev->dev, "sync done\n");
1496 static int _taal_enable_te(struct omap_dss_device *dssdev, bool enable)
1498 struct taal_data *td = dev_get_drvdata(&dssdev->dev);
1499 struct nokia_dsi_panel_data *panel_data = get_panel_data(dssdev);
1503 r = taal_dcs_write_1(td, MIPI_DCS_SET_TEAR_ON, 0);
1505 r = taal_dcs_write_0(td, MIPI_DCS_SET_TEAR_OFF);
1507 if (!panel_data->use_ext_te)
1508 omapdss_dsi_enable_te(dssdev, enable);
1510 if (td->panel_config->sleep.enable_te)
1511 msleep(td->panel_config->sleep.enable_te);
1516 static int taal_enable_te(struct omap_dss_device *dssdev, bool enable)
1518 struct taal_data *td = dev_get_drvdata(&dssdev->dev);
1521 mutex_lock(&td->lock);
1523 if (td->te_enabled == enable)
1526 dsi_bus_lock(dssdev);
1529 r = taal_wake_up(dssdev);
1533 r = _taal_enable_te(dssdev, enable);
1538 td->te_enabled = enable;
1540 dsi_bus_unlock(dssdev);
1542 mutex_unlock(&td->lock);
1546 dsi_bus_unlock(dssdev);
1547 mutex_unlock(&td->lock);
1552 static int taal_get_te(struct omap_dss_device *dssdev)
1554 struct taal_data *td = dev_get_drvdata(&dssdev->dev);
1557 mutex_lock(&td->lock);
1559 mutex_unlock(&td->lock);
1564 static int taal_rotate(struct omap_dss_device *dssdev, u8 rotate)
1566 struct taal_data *td = dev_get_drvdata(&dssdev->dev);
1569 dev_dbg(&dssdev->dev, "rotate %d\n", rotate);
1571 mutex_lock(&td->lock);
1573 if (td->rotate == rotate)
1576 dsi_bus_lock(dssdev);
1579 r = taal_wake_up(dssdev);
1583 r = taal_set_addr_mode(td, rotate, td->mirror);
1588 td->rotate = rotate;
1590 dsi_bus_unlock(dssdev);
1592 mutex_unlock(&td->lock);
1595 dsi_bus_unlock(dssdev);
1596 mutex_unlock(&td->lock);
1600 static u8 taal_get_rotate(struct omap_dss_device *dssdev)
1602 struct taal_data *td = dev_get_drvdata(&dssdev->dev);
1605 mutex_lock(&td->lock);
1607 mutex_unlock(&td->lock);
1612 static int taal_mirror(struct omap_dss_device *dssdev, bool enable)
1614 struct taal_data *td = dev_get_drvdata(&dssdev->dev);
1617 dev_dbg(&dssdev->dev, "mirror %d\n", enable);
1619 mutex_lock(&td->lock);
1621 if (td->mirror == enable)
1624 dsi_bus_lock(dssdev);
1626 r = taal_wake_up(dssdev);
1630 r = taal_set_addr_mode(td, td->rotate, enable);
1635 td->mirror = enable;
1637 dsi_bus_unlock(dssdev);
1639 mutex_unlock(&td->lock);
1642 dsi_bus_unlock(dssdev);
1643 mutex_unlock(&td->lock);
1647 static bool taal_get_mirror(struct omap_dss_device *dssdev)
1649 struct taal_data *td = dev_get_drvdata(&dssdev->dev);
1652 mutex_lock(&td->lock);
1654 mutex_unlock(&td->lock);
1659 static int taal_run_test(struct omap_dss_device *dssdev, int test_num)
1661 struct taal_data *td = dev_get_drvdata(&dssdev->dev);
1665 mutex_lock(&td->lock);
1672 dsi_bus_lock(dssdev);
1674 r = taal_wake_up(dssdev);
1678 r = taal_dcs_read_1(td, DCS_GET_ID1, &id1);
1681 r = taal_dcs_read_1(td, DCS_GET_ID2, &id2);
1684 r = taal_dcs_read_1(td, DCS_GET_ID3, &id3);
1688 dsi_bus_unlock(dssdev);
1689 mutex_unlock(&td->lock);
1692 dsi_bus_unlock(dssdev);
1694 mutex_unlock(&td->lock);
1698 static int taal_memory_read(struct omap_dss_device *dssdev,
1699 void *buf, size_t size,
1700 u16 x, u16 y, u16 w, u16 h)
1705 unsigned buf_used = 0;
1706 struct taal_data *td = dev_get_drvdata(&dssdev->dev);
1708 if (size < w * h * 3)
1711 mutex_lock(&td->lock);
1718 size = min(w * h * 3,
1719 dssdev->panel.timings.x_res *
1720 dssdev->panel.timings.y_res * 3);
1722 dsi_bus_lock(dssdev);
1724 r = taal_wake_up(dssdev);
1728 /* plen 1 or 2 goes into short packet. until checksum error is fixed,
1729 * use short packets. plen 32 works, but bigger packets seem to cause
1736 taal_set_update_window(td, x, y, w, h);
1738 r = dsi_vc_set_max_rx_packet_size(dssdev, td->channel, plen);
1742 while (buf_used < size) {
1743 u8 dcs_cmd = first ? 0x2e : 0x3e;
1746 r = dsi_vc_dcs_read(dssdev, td->channel, dcs_cmd,
1747 buf + buf_used, size - buf_used);
1750 dev_err(&dssdev->dev, "read error\n");
1757 dev_err(&dssdev->dev, "short read\n");
1761 if (signal_pending(current)) {
1762 dev_err(&dssdev->dev, "signal pending, "
1763 "aborting memory read\n");
1772 dsi_vc_set_max_rx_packet_size(dssdev, td->channel, 1);
1774 dsi_bus_unlock(dssdev);
1776 mutex_unlock(&td->lock);
1780 static void taal_ulps_work(struct work_struct *work)
1782 struct taal_data *td = container_of(work, struct taal_data,
1784 struct omap_dss_device *dssdev = td->dssdev;
1786 mutex_lock(&td->lock);
1788 if (dssdev->state != OMAP_DSS_DISPLAY_ACTIVE || !td->enabled) {
1789 mutex_unlock(&td->lock);
1793 dsi_bus_lock(dssdev);
1795 taal_enter_ulps(dssdev);
1797 dsi_bus_unlock(dssdev);
1798 mutex_unlock(&td->lock);
1801 static void taal_esd_work(struct work_struct *work)
1803 struct taal_data *td = container_of(work, struct taal_data,
1805 struct omap_dss_device *dssdev = td->dssdev;
1806 struct nokia_dsi_panel_data *panel_data = get_panel_data(dssdev);
1810 mutex_lock(&td->lock);
1813 mutex_unlock(&td->lock);
1817 dsi_bus_lock(dssdev);
1819 r = taal_wake_up(dssdev);
1821 dev_err(&dssdev->dev, "failed to exit ULPS\n");
1825 r = taal_dcs_read_1(td, MIPI_DCS_GET_DIAGNOSTIC_RESULT, &state1);
1827 dev_err(&dssdev->dev, "failed to read Taal status\n");
1831 /* Run self diagnostics */
1832 r = taal_sleep_out(td);
1834 dev_err(&dssdev->dev, "failed to run Taal self-diagnostics\n");
1838 r = taal_dcs_read_1(td, MIPI_DCS_GET_DIAGNOSTIC_RESULT, &state2);
1840 dev_err(&dssdev->dev, "failed to read Taal status\n");
1844 /* Each sleep out command will trigger a self diagnostic and flip
1845 * Bit6 if the test passes.
1847 if (!((state1 ^ state2) & (1 << 6))) {
1848 dev_err(&dssdev->dev, "LCD self diagnostics failed\n");
1851 /* Self-diagnostics result is also shown on TE GPIO line. We need
1852 * to re-enable TE after self diagnostics */
1853 if (td->te_enabled && panel_data->use_ext_te) {
1854 r = taal_dcs_write_1(td, MIPI_DCS_SET_TEAR_ON, 0);
1859 dsi_bus_unlock(dssdev);
1861 taal_queue_esd_work(dssdev);
1863 mutex_unlock(&td->lock);
1866 dev_err(&dssdev->dev, "performing LCD reset\n");
1868 taal_panel_reset(dssdev);
1870 dsi_bus_unlock(dssdev);
1872 taal_queue_esd_work(dssdev);
1874 mutex_unlock(&td->lock);
1877 static struct omap_dss_driver taal_driver = {
1878 .probe = taal_probe,
1879 .remove = __exit_p(taal_remove),
1881 .enable = taal_enable,
1882 .disable = taal_disable,
1883 .suspend = taal_suspend,
1884 .resume = taal_resume,
1886 .update = taal_update,
1889 .get_resolution = taal_get_resolution,
1890 .get_recommended_bpp = omapdss_default_get_recommended_bpp,
1892 .enable_te = taal_enable_te,
1893 .get_te = taal_get_te,
1895 .set_rotate = taal_rotate,
1896 .get_rotate = taal_get_rotate,
1897 .set_mirror = taal_mirror,
1898 .get_mirror = taal_get_mirror,
1899 .run_test = taal_run_test,
1900 .memory_read = taal_memory_read,
1902 .get_timings = taal_get_timings,
1906 .owner = THIS_MODULE,
1910 static int __init taal_init(void)
1912 omap_dss_register_driver(&taal_driver);
1917 static void __exit taal_exit(void)
1919 omap_dss_unregister_driver(&taal_driver);
1922 module_init(taal_init);
1923 module_exit(taal_exit);
1925 MODULE_AUTHOR("Tomi Valkeinen <tomi.valkeinen@nokia.com>");
1926 MODULE_DESCRIPTION("Taal Driver");
1927 MODULE_LICENSE("GPL");