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>
39 /* DSI Virtual channel. Hardcoded for now. */
42 #define DCS_READ_NUM_ERRORS 0x05
43 #define DCS_READ_POWER_MODE 0x0a
44 #define DCS_READ_MADCTL 0x0b
45 #define DCS_READ_PIXEL_FORMAT 0x0c
46 #define DCS_RDDSDR 0x0f
47 #define DCS_SLEEP_IN 0x10
48 #define DCS_SLEEP_OUT 0x11
49 #define DCS_DISPLAY_OFF 0x28
50 #define DCS_DISPLAY_ON 0x29
51 #define DCS_COLUMN_ADDR 0x2a
52 #define DCS_PAGE_ADDR 0x2b
53 #define DCS_MEMORY_WRITE 0x2c
54 #define DCS_TEAR_OFF 0x34
55 #define DCS_TEAR_ON 0x35
56 #define DCS_MEM_ACC_CTRL 0x36
57 #define DCS_PIXEL_FORMAT 0x3a
58 #define DCS_BRIGHTNESS 0x51
59 #define DCS_CTRL_DISPLAY 0x53
60 #define DCS_WRITE_CABC 0x55
61 #define DCS_READ_CABC 0x56
62 #define DCS_GET_ID1 0xda
63 #define DCS_GET_ID2 0xdb
64 #define DCS_GET_ID3 0xdc
66 static irqreturn_t taal_te_isr(int irq, void *data);
67 static void taal_te_timeout_work_callback(struct work_struct *work);
68 static int _taal_enable_te(struct omap_dss_device *dssdev, bool enable);
70 struct panel_regulator {
71 struct regulator *regulator;
77 static void free_regulators(struct panel_regulator *regulators, int n)
81 for (i = 0; i < n; i++) {
82 /* disable/put in reverse order */
83 regulator_disable(regulators[n - i - 1].regulator);
84 regulator_put(regulators[n - i - 1].regulator);
88 static int init_regulators(struct omap_dss_device *dssdev,
89 struct panel_regulator *regulators, int n)
93 for (i = 0; i < n; i++) {
94 struct regulator *reg;
96 reg = regulator_get(&dssdev->dev, regulators[i].name);
98 dev_err(&dssdev->dev, "failed to get regulator %s\n",
104 /* FIXME: better handling of fixed vs. variable regulators */
105 v = regulator_get_voltage(reg);
106 if (v < regulators[i].min_uV || v > regulators[i].max_uV) {
107 r = regulator_set_voltage(reg, regulators[i].min_uV,
108 regulators[i].max_uV);
110 dev_err(&dssdev->dev,
111 "failed to set regulator %s voltage\n",
118 r = regulator_enable(reg);
120 dev_err(&dssdev->dev, "failed to enable regulator %s\n",
126 regulators[i].regulator = reg;
132 free_regulators(regulators, i);
138 * struct panel_config - panel configuration
141 * @timings: panel resolution
142 * @sleep: various panel specific delays, passed to msleep() if non-zero
143 * @reset_sequence: reset sequence timings, passed to udelay() if non-zero
144 * @regulators: array of panel regulators
145 * @num_regulators: number of regulators in the array
147 struct panel_config {
151 struct omap_video_timings timings;
154 unsigned int sleep_in;
155 unsigned int sleep_out;
156 unsigned int hw_reset;
157 unsigned int enable_te;
165 struct panel_regulator *regulators;
173 static struct panel_config panel_configs[] = {
185 .enable_te = 100, /* possible panel bug */
197 struct backlight_device *bldev;
199 unsigned long hw_guard_end; /* next value of jiffies when we can
200 * issue the next sleep in/out command
202 unsigned long hw_guard_wait; /* max guard time in jiffies */
204 struct omap_dss_device *dssdev;
221 struct delayed_work te_timeout_work;
230 struct workqueue_struct *esd_wq;
231 struct delayed_work esd_work;
232 unsigned esd_interval;
234 struct panel_config *panel_config;
237 static inline struct nokia_dsi_panel_data
238 *get_panel_data(const struct omap_dss_device *dssdev)
240 return (struct nokia_dsi_panel_data *) dssdev->data;
243 static void taal_esd_work(struct work_struct *work);
245 static void hw_guard_start(struct taal_data *td, int guard_msec)
247 td->hw_guard_wait = msecs_to_jiffies(guard_msec);
248 td->hw_guard_end = jiffies + td->hw_guard_wait;
251 static void hw_guard_wait(struct taal_data *td)
253 unsigned long wait = td->hw_guard_end - jiffies;
255 if ((long)wait > 0 && wait <= td->hw_guard_wait) {
256 set_current_state(TASK_UNINTERRUPTIBLE);
257 schedule_timeout(wait);
261 static int taal_dcs_read_1(struct taal_data *td, u8 dcs_cmd, u8 *data)
266 r = dsi_vc_dcs_read(td->channel, dcs_cmd, buf, 1);
276 static int taal_dcs_write_0(struct taal_data *td, u8 dcs_cmd)
278 return dsi_vc_dcs_write(td->channel, &dcs_cmd, 1);
281 static int taal_dcs_write_1(struct taal_data *td, u8 dcs_cmd, u8 param)
286 return dsi_vc_dcs_write(td->channel, buf, 2);
289 static int taal_sleep_in(struct taal_data *td)
298 r = dsi_vc_dcs_write_nosync(td->channel, &cmd, 1);
302 hw_guard_start(td, 120);
304 if (td->panel_config->sleep.sleep_in)
305 msleep(td->panel_config->sleep.sleep_in);
310 static int taal_sleep_out(struct taal_data *td)
316 r = taal_dcs_write_0(td, DCS_SLEEP_OUT);
320 hw_guard_start(td, 120);
322 if (td->panel_config->sleep.sleep_out)
323 msleep(td->panel_config->sleep.sleep_out);
328 static int taal_get_id(struct taal_data *td, u8 *id1, u8 *id2, u8 *id3)
332 r = taal_dcs_read_1(td, DCS_GET_ID1, id1);
335 r = taal_dcs_read_1(td, DCS_GET_ID2, id2);
338 r = taal_dcs_read_1(td, DCS_GET_ID3, id3);
345 static int taal_set_addr_mode(struct taal_data *td, u8 rotate, bool mirror)
351 r = taal_dcs_read_1(td, DCS_READ_MADCTL, &mode);
382 mode &= ~((1<<7) | (1<<6) | (1<<5));
383 mode |= (b7 << 7) | (b6 << 6) | (b5 << 5);
385 return taal_dcs_write_1(td, DCS_MEM_ACC_CTRL, mode);
388 static int taal_set_update_window(struct taal_data *td,
389 u16 x, u16 y, u16 w, u16 h)
398 buf[0] = DCS_COLUMN_ADDR;
399 buf[1] = (x1 >> 8) & 0xff;
400 buf[2] = (x1 >> 0) & 0xff;
401 buf[3] = (x2 >> 8) & 0xff;
402 buf[4] = (x2 >> 0) & 0xff;
404 r = dsi_vc_dcs_write_nosync(td->channel, buf, sizeof(buf));
408 buf[0] = DCS_PAGE_ADDR;
409 buf[1] = (y1 >> 8) & 0xff;
410 buf[2] = (y1 >> 0) & 0xff;
411 buf[3] = (y2 >> 8) & 0xff;
412 buf[4] = (y2 >> 0) & 0xff;
414 r = dsi_vc_dcs_write_nosync(td->channel, buf, sizeof(buf));
418 dsi_vc_send_bta_sync(td->channel);
423 static int taal_bl_update_status(struct backlight_device *dev)
425 struct omap_dss_device *dssdev = dev_get_drvdata(&dev->dev);
426 struct taal_data *td = dev_get_drvdata(&dssdev->dev);
427 struct nokia_dsi_panel_data *panel_data = get_panel_data(dssdev);
431 if (dev->props.fb_blank == FB_BLANK_UNBLANK &&
432 dev->props.power == FB_BLANK_UNBLANK)
433 level = dev->props.brightness;
437 dev_dbg(&dssdev->dev, "update brightness to %d\n", level);
439 mutex_lock(&td->lock);
441 if (td->use_dsi_bl) {
444 r = taal_dcs_write_1(td, DCS_BRIGHTNESS, level);
450 if (!panel_data->set_backlight)
453 r = panel_data->set_backlight(dssdev, level);
456 mutex_unlock(&td->lock);
461 static int taal_bl_get_intensity(struct backlight_device *dev)
463 if (dev->props.fb_blank == FB_BLANK_UNBLANK &&
464 dev->props.power == FB_BLANK_UNBLANK)
465 return dev->props.brightness;
470 static const struct backlight_ops taal_bl_ops = {
471 .get_brightness = taal_bl_get_intensity,
472 .update_status = taal_bl_update_status,
475 static void taal_get_timings(struct omap_dss_device *dssdev,
476 struct omap_video_timings *timings)
478 *timings = dssdev->panel.timings;
481 static void taal_get_resolution(struct omap_dss_device *dssdev,
482 u16 *xres, u16 *yres)
484 struct taal_data *td = dev_get_drvdata(&dssdev->dev);
486 if (td->rotate == 0 || td->rotate == 2) {
487 *xres = dssdev->panel.timings.x_res;
488 *yres = dssdev->panel.timings.y_res;
490 *yres = dssdev->panel.timings.x_res;
491 *xres = dssdev->panel.timings.y_res;
495 static ssize_t taal_num_errors_show(struct device *dev,
496 struct device_attribute *attr, char *buf)
498 struct omap_dss_device *dssdev = to_dss_device(dev);
499 struct taal_data *td = dev_get_drvdata(&dssdev->dev);
503 mutex_lock(&td->lock);
507 r = taal_dcs_read_1(td, DCS_READ_NUM_ERRORS, &errors);
513 mutex_unlock(&td->lock);
518 return snprintf(buf, PAGE_SIZE, "%d\n", errors);
521 static ssize_t taal_hw_revision_show(struct device *dev,
522 struct device_attribute *attr, char *buf)
524 struct omap_dss_device *dssdev = to_dss_device(dev);
525 struct taal_data *td = dev_get_drvdata(&dssdev->dev);
529 mutex_lock(&td->lock);
533 r = taal_get_id(td, &id1, &id2, &id3);
539 mutex_unlock(&td->lock);
544 return snprintf(buf, PAGE_SIZE, "%02x.%02x.%02x\n", id1, id2, id3);
547 static const char *cabc_modes[] = {
548 "off", /* used also always when CABC is not supported */
554 static ssize_t show_cabc_mode(struct device *dev,
555 struct device_attribute *attr,
558 struct omap_dss_device *dssdev = to_dss_device(dev);
559 struct taal_data *td = dev_get_drvdata(&dssdev->dev);
560 const char *mode_str;
564 mode = td->cabc_mode;
566 mode_str = "unknown";
567 if (mode >= 0 && mode < ARRAY_SIZE(cabc_modes))
568 mode_str = cabc_modes[mode];
569 len = snprintf(buf, PAGE_SIZE, "%s\n", mode_str);
571 return len < PAGE_SIZE - 1 ? len : PAGE_SIZE - 1;
574 static ssize_t store_cabc_mode(struct device *dev,
575 struct device_attribute *attr,
576 const char *buf, size_t count)
578 struct omap_dss_device *dssdev = to_dss_device(dev);
579 struct taal_data *td = dev_get_drvdata(&dssdev->dev);
582 for (i = 0; i < ARRAY_SIZE(cabc_modes); i++) {
583 if (sysfs_streq(cabc_modes[i], buf))
587 if (i == ARRAY_SIZE(cabc_modes))
590 mutex_lock(&td->lock);
594 if (!td->cabc_broken)
595 taal_dcs_write_1(td, DCS_WRITE_CABC, i);
601 mutex_unlock(&td->lock);
606 static ssize_t show_cabc_available_modes(struct device *dev,
607 struct device_attribute *attr,
614 len < PAGE_SIZE && i < ARRAY_SIZE(cabc_modes); i++)
615 len += snprintf(&buf[len], PAGE_SIZE - len, "%s%s%s",
616 i ? " " : "", cabc_modes[i],
617 i == ARRAY_SIZE(cabc_modes) - 1 ? "\n" : "");
619 return len < PAGE_SIZE ? len : PAGE_SIZE - 1;
622 static DEVICE_ATTR(num_dsi_errors, S_IRUGO, taal_num_errors_show, NULL);
623 static DEVICE_ATTR(hw_revision, S_IRUGO, taal_hw_revision_show, NULL);
624 static DEVICE_ATTR(cabc_mode, S_IRUGO | S_IWUSR,
625 show_cabc_mode, store_cabc_mode);
626 static DEVICE_ATTR(cabc_available_modes, S_IRUGO,
627 show_cabc_available_modes, NULL);
629 static struct attribute *taal_attrs[] = {
630 &dev_attr_num_dsi_errors.attr,
631 &dev_attr_hw_revision.attr,
632 &dev_attr_cabc_mode.attr,
633 &dev_attr_cabc_available_modes.attr,
637 static struct attribute_group taal_attr_group = {
641 static void taal_hw_reset(struct omap_dss_device *dssdev)
643 struct taal_data *td = dev_get_drvdata(&dssdev->dev);
644 struct nokia_dsi_panel_data *panel_data = get_panel_data(dssdev);
646 if (panel_data->reset_gpio == -1)
649 gpio_set_value(panel_data->reset_gpio, 1);
650 if (td->panel_config->reset_sequence.high)
651 udelay(td->panel_config->reset_sequence.high);
652 /* reset the panel */
653 gpio_set_value(panel_data->reset_gpio, 0);
655 if (td->panel_config->reset_sequence.low)
656 udelay(td->panel_config->reset_sequence.low);
657 gpio_set_value(panel_data->reset_gpio, 1);
658 /* wait after releasing reset */
659 if (td->panel_config->sleep.hw_reset)
660 msleep(td->panel_config->sleep.hw_reset);
663 static int taal_probe(struct omap_dss_device *dssdev)
665 struct backlight_properties props;
666 struct taal_data *td;
667 struct backlight_device *bldev;
668 struct nokia_dsi_panel_data *panel_data = get_panel_data(dssdev);
669 struct panel_config *panel_config = NULL;
672 dev_dbg(&dssdev->dev, "probe\n");
674 if (!panel_data || !panel_data->name) {
679 for (i = 0; i < ARRAY_SIZE(panel_configs); i++) {
680 if (strcmp(panel_data->name, panel_configs[i].name) == 0) {
681 panel_config = &panel_configs[i];
691 dssdev->panel.config = OMAP_DSS_LCD_TFT;
692 dssdev->panel.timings = panel_config->timings;
693 dssdev->ctrl.pixel_size = 24;
695 td = kzalloc(sizeof(*td), GFP_KERNEL);
701 td->panel_config = panel_config;
702 td->esd_interval = panel_data->esd_interval;
704 mutex_init(&td->lock);
706 atomic_set(&td->do_update, 0);
708 r = init_regulators(dssdev, panel_config->regulators,
709 panel_config->num_regulators);
713 td->esd_wq = create_singlethread_workqueue("taal_esd");
714 if (td->esd_wq == NULL) {
715 dev_err(&dssdev->dev, "can't create ESD workqueue\n");
719 INIT_DELAYED_WORK_DEFERRABLE(&td->esd_work, taal_esd_work);
721 dev_set_drvdata(&dssdev->dev, td);
723 taal_hw_reset(dssdev);
725 /* if no platform set_backlight() defined, presume DSI backlight
727 memset(&props, 0, sizeof(struct backlight_properties));
728 if (!panel_data->set_backlight)
729 td->use_dsi_bl = true;
732 props.max_brightness = 255;
734 props.max_brightness = 127;
736 props.type = BACKLIGHT_RAW;
737 bldev = backlight_device_register("taal", &dssdev->dev, dssdev,
738 &taal_bl_ops, &props);
746 bldev->props.fb_blank = FB_BLANK_UNBLANK;
747 bldev->props.power = FB_BLANK_UNBLANK;
749 bldev->props.brightness = 255;
751 bldev->props.brightness = 127;
753 taal_bl_update_status(bldev);
755 if (panel_data->use_ext_te) {
756 int gpio = panel_data->ext_te_gpio;
758 r = gpio_request(gpio, "taal irq");
760 dev_err(&dssdev->dev, "GPIO request failed\n");
764 gpio_direction_input(gpio);
766 r = request_irq(gpio_to_irq(gpio), taal_te_isr,
767 IRQF_DISABLED | IRQF_TRIGGER_RISING,
768 "taal vsync", dssdev);
771 dev_err(&dssdev->dev, "IRQ request failed\n");
776 INIT_DELAYED_WORK_DEFERRABLE(&td->te_timeout_work,
777 taal_te_timeout_work_callback);
779 dev_dbg(&dssdev->dev, "Using GPIO TE\n");
782 r = omap_dsi_request_vc(dssdev, &td->channel);
784 dev_err(&dssdev->dev, "failed to get virtual channel\n");
788 r = omap_dsi_set_vc_id(dssdev, td->channel, TCH);
790 dev_err(&dssdev->dev, "failed to set VC_ID\n");
794 r = sysfs_create_group(&dssdev->dev.kobj, &taal_attr_group);
796 dev_err(&dssdev->dev, "failed to create sysfs files\n");
803 omap_dsi_release_vc(dssdev, td->channel);
805 if (panel_data->use_ext_te)
806 free_irq(gpio_to_irq(panel_data->ext_te_gpio), dssdev);
808 if (panel_data->use_ext_te)
809 gpio_free(panel_data->ext_te_gpio);
811 backlight_device_unregister(bldev);
813 destroy_workqueue(td->esd_wq);
815 free_regulators(panel_config->regulators, panel_config->num_regulators);
822 static void __exit taal_remove(struct omap_dss_device *dssdev)
824 struct taal_data *td = dev_get_drvdata(&dssdev->dev);
825 struct nokia_dsi_panel_data *panel_data = get_panel_data(dssdev);
826 struct backlight_device *bldev;
828 dev_dbg(&dssdev->dev, "remove\n");
830 sysfs_remove_group(&dssdev->dev.kobj, &taal_attr_group);
831 omap_dsi_release_vc(dssdev, td->channel);
833 if (panel_data->use_ext_te) {
834 int gpio = panel_data->ext_te_gpio;
835 free_irq(gpio_to_irq(gpio), dssdev);
840 bldev->props.power = FB_BLANK_POWERDOWN;
841 taal_bl_update_status(bldev);
842 backlight_device_unregister(bldev);
844 cancel_delayed_work(&td->esd_work);
845 destroy_workqueue(td->esd_wq);
847 /* reset, to be sure that the panel is in a valid state */
848 taal_hw_reset(dssdev);
850 free_regulators(td->panel_config->regulators,
851 td->panel_config->num_regulators);
856 static int taal_power_on(struct omap_dss_device *dssdev)
858 struct taal_data *td = dev_get_drvdata(&dssdev->dev);
862 r = omapdss_dsi_display_enable(dssdev);
864 dev_err(&dssdev->dev, "failed to enable DSI\n");
868 taal_hw_reset(dssdev);
870 omapdss_dsi_vc_enable_hs(td->channel, false);
872 r = taal_sleep_out(td);
876 r = taal_get_id(td, &id1, &id2, &id3);
880 /* on early Taal revisions CABC is broken */
881 if (td->panel_config->type == PANEL_TAAL &&
882 (id2 == 0x00 || id2 == 0xff || id2 == 0x81))
883 td->cabc_broken = true;
885 r = taal_dcs_write_1(td, DCS_BRIGHTNESS, 0xff);
889 r = taal_dcs_write_1(td, DCS_CTRL_DISPLAY,
890 (1<<2) | (1<<5)); /* BL | BCTRL */
894 r = taal_dcs_write_1(td, DCS_PIXEL_FORMAT, 0x7); /* 24bit/pixel */
898 r = taal_set_addr_mode(td, td->rotate, td->mirror);
902 if (!td->cabc_broken) {
903 r = taal_dcs_write_1(td, DCS_WRITE_CABC, td->cabc_mode);
908 r = taal_dcs_write_0(td, DCS_DISPLAY_ON);
912 r = _taal_enable_te(dssdev, td->te_enabled);
918 if (!td->intro_printed) {
919 dev_info(&dssdev->dev, "%s panel revision %02x.%02x.%02x\n",
920 td->panel_config->name, id1, id2, id3);
922 dev_info(&dssdev->dev,
923 "old Taal version, CABC disabled\n");
924 td->intro_printed = true;
927 omapdss_dsi_vc_enable_hs(td->channel, true);
931 dev_err(&dssdev->dev, "error while enabling panel, issuing HW reset\n");
933 taal_hw_reset(dssdev);
935 omapdss_dsi_display_disable(dssdev, true, false);
940 static void taal_power_off(struct omap_dss_device *dssdev)
942 struct taal_data *td = dev_get_drvdata(&dssdev->dev);
945 r = taal_dcs_write_0(td, DCS_DISPLAY_OFF);
947 r = taal_sleep_in(td);
948 /* HACK: wait a bit so that the message goes through */
953 dev_err(&dssdev->dev,
954 "error disabling panel, issuing HW reset\n");
955 taal_hw_reset(dssdev);
958 omapdss_dsi_display_disable(dssdev, true, false);
963 static int taal_enable(struct omap_dss_device *dssdev)
965 struct taal_data *td = dev_get_drvdata(&dssdev->dev);
968 dev_dbg(&dssdev->dev, "enable\n");
970 mutex_lock(&td->lock);
972 if (dssdev->state != OMAP_DSS_DISPLAY_DISABLED) {
979 r = taal_power_on(dssdev);
986 if (td->esd_interval > 0)
987 queue_delayed_work(td->esd_wq, &td->esd_work,
988 msecs_to_jiffies(td->esd_interval));
990 dssdev->state = OMAP_DSS_DISPLAY_ACTIVE;
992 mutex_unlock(&td->lock);
996 dev_dbg(&dssdev->dev, "enable failed\n");
997 mutex_unlock(&td->lock);
1001 static void taal_disable(struct omap_dss_device *dssdev)
1003 struct taal_data *td = dev_get_drvdata(&dssdev->dev);
1005 dev_dbg(&dssdev->dev, "disable\n");
1007 mutex_lock(&td->lock);
1009 cancel_delayed_work(&td->esd_work);
1013 if (dssdev->state == OMAP_DSS_DISPLAY_ACTIVE)
1014 taal_power_off(dssdev);
1018 dssdev->state = OMAP_DSS_DISPLAY_DISABLED;
1020 mutex_unlock(&td->lock);
1023 static int taal_suspend(struct omap_dss_device *dssdev)
1025 struct taal_data *td = dev_get_drvdata(&dssdev->dev);
1028 dev_dbg(&dssdev->dev, "suspend\n");
1030 mutex_lock(&td->lock);
1032 if (dssdev->state != OMAP_DSS_DISPLAY_ACTIVE) {
1037 cancel_delayed_work(&td->esd_work);
1041 taal_power_off(dssdev);
1045 dssdev->state = OMAP_DSS_DISPLAY_SUSPENDED;
1047 mutex_unlock(&td->lock);
1051 mutex_unlock(&td->lock);
1055 static int taal_resume(struct omap_dss_device *dssdev)
1057 struct taal_data *td = dev_get_drvdata(&dssdev->dev);
1060 dev_dbg(&dssdev->dev, "resume\n");
1062 mutex_lock(&td->lock);
1064 if (dssdev->state != OMAP_DSS_DISPLAY_SUSPENDED) {
1071 r = taal_power_on(dssdev);
1076 dssdev->state = OMAP_DSS_DISPLAY_DISABLED;
1078 dssdev->state = OMAP_DSS_DISPLAY_ACTIVE;
1079 if (td->esd_interval > 0)
1080 queue_delayed_work(td->esd_wq, &td->esd_work,
1081 msecs_to_jiffies(td->esd_interval));
1084 mutex_unlock(&td->lock);
1088 mutex_unlock(&td->lock);
1092 static void taal_framedone_cb(int err, void *data)
1094 struct omap_dss_device *dssdev = data;
1095 dev_dbg(&dssdev->dev, "framedone, err %d\n", err);
1099 static irqreturn_t taal_te_isr(int irq, void *data)
1101 struct omap_dss_device *dssdev = data;
1102 struct taal_data *td = dev_get_drvdata(&dssdev->dev);
1106 old = atomic_cmpxchg(&td->do_update, 1, 0);
1109 cancel_delayed_work(&td->te_timeout_work);
1111 r = omap_dsi_update(dssdev, td->channel,
1112 td->update_region.x,
1113 td->update_region.y,
1114 td->update_region.w,
1115 td->update_region.h,
1116 taal_framedone_cb, dssdev);
1123 dev_err(&dssdev->dev, "start update failed\n");
1128 static void taal_te_timeout_work_callback(struct work_struct *work)
1130 struct taal_data *td = container_of(work, struct taal_data,
1131 te_timeout_work.work);
1132 struct omap_dss_device *dssdev = td->dssdev;
1134 dev_err(&dssdev->dev, "TE not received for 250ms!\n");
1136 atomic_set(&td->do_update, 0);
1140 static int taal_update(struct omap_dss_device *dssdev,
1141 u16 x, u16 y, u16 w, u16 h)
1143 struct taal_data *td = dev_get_drvdata(&dssdev->dev);
1144 struct nokia_dsi_panel_data *panel_data = get_panel_data(dssdev);
1147 dev_dbg(&dssdev->dev, "update %d, %d, %d x %d\n", x, y, w, h);
1149 mutex_lock(&td->lock);
1157 r = omap_dsi_prepare_update(dssdev, &x, &y, &w, &h, true);
1161 r = taal_set_update_window(td, x, y, w, h);
1165 if (td->te_enabled && panel_data->use_ext_te) {
1166 td->update_region.x = x;
1167 td->update_region.y = y;
1168 td->update_region.w = w;
1169 td->update_region.h = h;
1171 schedule_delayed_work(&td->te_timeout_work,
1172 msecs_to_jiffies(250));
1173 atomic_set(&td->do_update, 1);
1175 r = omap_dsi_update(dssdev, td->channel, x, y, w, h,
1176 taal_framedone_cb, dssdev);
1181 /* note: no bus_unlock here. unlock is in framedone_cb */
1182 mutex_unlock(&td->lock);
1186 mutex_unlock(&td->lock);
1190 static int taal_sync(struct omap_dss_device *dssdev)
1192 struct taal_data *td = dev_get_drvdata(&dssdev->dev);
1194 dev_dbg(&dssdev->dev, "sync\n");
1196 mutex_lock(&td->lock);
1199 mutex_unlock(&td->lock);
1201 dev_dbg(&dssdev->dev, "sync done\n");
1206 static int _taal_enable_te(struct omap_dss_device *dssdev, bool enable)
1208 struct taal_data *td = dev_get_drvdata(&dssdev->dev);
1209 struct nokia_dsi_panel_data *panel_data = get_panel_data(dssdev);
1213 r = taal_dcs_write_1(td, DCS_TEAR_ON, 0);
1215 r = taal_dcs_write_0(td, DCS_TEAR_OFF);
1217 if (!panel_data->use_ext_te)
1218 omapdss_dsi_enable_te(dssdev, enable);
1220 if (td->panel_config->sleep.enable_te)
1221 msleep(td->panel_config->sleep.enable_te);
1226 static int taal_enable_te(struct omap_dss_device *dssdev, bool enable)
1228 struct taal_data *td = dev_get_drvdata(&dssdev->dev);
1231 mutex_lock(&td->lock);
1233 if (td->te_enabled == enable)
1239 r = _taal_enable_te(dssdev, enable);
1244 td->te_enabled = enable;
1248 mutex_unlock(&td->lock);
1253 mutex_unlock(&td->lock);
1258 static int taal_get_te(struct omap_dss_device *dssdev)
1260 struct taal_data *td = dev_get_drvdata(&dssdev->dev);
1263 mutex_lock(&td->lock);
1265 mutex_unlock(&td->lock);
1270 static int taal_rotate(struct omap_dss_device *dssdev, u8 rotate)
1272 struct taal_data *td = dev_get_drvdata(&dssdev->dev);
1275 dev_dbg(&dssdev->dev, "rotate %d\n", rotate);
1277 mutex_lock(&td->lock);
1279 if (td->rotate == rotate)
1285 r = taal_set_addr_mode(td, rotate, td->mirror);
1290 td->rotate = rotate;
1294 mutex_unlock(&td->lock);
1298 mutex_unlock(&td->lock);
1302 static u8 taal_get_rotate(struct omap_dss_device *dssdev)
1304 struct taal_data *td = dev_get_drvdata(&dssdev->dev);
1307 mutex_lock(&td->lock);
1309 mutex_unlock(&td->lock);
1314 static int taal_mirror(struct omap_dss_device *dssdev, bool enable)
1316 struct taal_data *td = dev_get_drvdata(&dssdev->dev);
1319 dev_dbg(&dssdev->dev, "mirror %d\n", enable);
1321 mutex_lock(&td->lock);
1323 if (td->mirror == enable)
1328 r = taal_set_addr_mode(td, td->rotate, enable);
1333 td->mirror = enable;
1337 mutex_unlock(&td->lock);
1341 mutex_unlock(&td->lock);
1345 static bool taal_get_mirror(struct omap_dss_device *dssdev)
1347 struct taal_data *td = dev_get_drvdata(&dssdev->dev);
1350 mutex_lock(&td->lock);
1352 mutex_unlock(&td->lock);
1357 static int taal_run_test(struct omap_dss_device *dssdev, int test_num)
1359 struct taal_data *td = dev_get_drvdata(&dssdev->dev);
1363 mutex_lock(&td->lock);
1372 r = taal_dcs_read_1(td, DCS_GET_ID1, &id1);
1375 r = taal_dcs_read_1(td, DCS_GET_ID2, &id2);
1378 r = taal_dcs_read_1(td, DCS_GET_ID3, &id3);
1383 mutex_unlock(&td->lock);
1388 mutex_unlock(&td->lock);
1392 static int taal_memory_read(struct omap_dss_device *dssdev,
1393 void *buf, size_t size,
1394 u16 x, u16 y, u16 w, u16 h)
1399 unsigned buf_used = 0;
1400 struct taal_data *td = dev_get_drvdata(&dssdev->dev);
1402 if (size < w * h * 3)
1405 mutex_lock(&td->lock);
1412 size = min(w * h * 3,
1413 dssdev->panel.timings.x_res *
1414 dssdev->panel.timings.y_res * 3);
1418 /* plen 1 or 2 goes into short packet. until checksum error is fixed,
1419 * use short packets. plen 32 works, but bigger packets seem to cause
1426 taal_set_update_window(td, x, y, w, h);
1428 r = dsi_vc_set_max_rx_packet_size(td->channel, plen);
1432 while (buf_used < size) {
1433 u8 dcs_cmd = first ? 0x2e : 0x3e;
1436 r = dsi_vc_dcs_read(td->channel, dcs_cmd,
1437 buf + buf_used, size - buf_used);
1440 dev_err(&dssdev->dev, "read error\n");
1447 dev_err(&dssdev->dev, "short read\n");
1451 if (signal_pending(current)) {
1452 dev_err(&dssdev->dev, "signal pending, "
1453 "aborting memory read\n");
1462 dsi_vc_set_max_rx_packet_size(td->channel, 1);
1466 mutex_unlock(&td->lock);
1470 static void taal_esd_work(struct work_struct *work)
1472 struct taal_data *td = container_of(work, struct taal_data,
1474 struct omap_dss_device *dssdev = td->dssdev;
1475 struct nokia_dsi_panel_data *panel_data = get_panel_data(dssdev);
1479 mutex_lock(&td->lock);
1482 mutex_unlock(&td->lock);
1488 r = taal_dcs_read_1(td, DCS_RDDSDR, &state1);
1490 dev_err(&dssdev->dev, "failed to read Taal status\n");
1494 /* Run self diagnostics */
1495 r = taal_sleep_out(td);
1497 dev_err(&dssdev->dev, "failed to run Taal self-diagnostics\n");
1501 r = taal_dcs_read_1(td, DCS_RDDSDR, &state2);
1503 dev_err(&dssdev->dev, "failed to read Taal status\n");
1507 /* Each sleep out command will trigger a self diagnostic and flip
1508 * Bit6 if the test passes.
1510 if (!((state1 ^ state2) & (1 << 6))) {
1511 dev_err(&dssdev->dev, "LCD self diagnostics failed\n");
1514 /* Self-diagnostics result is also shown on TE GPIO line. We need
1515 * to re-enable TE after self diagnostics */
1516 if (td->te_enabled && panel_data->use_ext_te) {
1517 r = taal_dcs_write_1(td, DCS_TEAR_ON, 0);
1524 queue_delayed_work(td->esd_wq, &td->esd_work,
1525 msecs_to_jiffies(td->esd_interval));
1527 mutex_unlock(&td->lock);
1530 dev_err(&dssdev->dev, "performing LCD reset\n");
1532 taal_power_off(dssdev);
1533 taal_hw_reset(dssdev);
1534 taal_power_on(dssdev);
1538 queue_delayed_work(td->esd_wq, &td->esd_work,
1539 msecs_to_jiffies(td->esd_interval));
1541 mutex_unlock(&td->lock);
1544 static int taal_set_update_mode(struct omap_dss_device *dssdev,
1545 enum omap_dss_update_mode mode)
1547 if (mode != OMAP_DSS_UPDATE_MANUAL)
1552 static enum omap_dss_update_mode taal_get_update_mode(
1553 struct omap_dss_device *dssdev)
1555 return OMAP_DSS_UPDATE_MANUAL;
1558 static struct omap_dss_driver taal_driver = {
1559 .probe = taal_probe,
1560 .remove = __exit_p(taal_remove),
1562 .enable = taal_enable,
1563 .disable = taal_disable,
1564 .suspend = taal_suspend,
1565 .resume = taal_resume,
1567 .set_update_mode = taal_set_update_mode,
1568 .get_update_mode = taal_get_update_mode,
1570 .update = taal_update,
1573 .get_resolution = taal_get_resolution,
1574 .get_recommended_bpp = omapdss_default_get_recommended_bpp,
1576 .enable_te = taal_enable_te,
1577 .get_te = taal_get_te,
1579 .set_rotate = taal_rotate,
1580 .get_rotate = taal_get_rotate,
1581 .set_mirror = taal_mirror,
1582 .get_mirror = taal_get_mirror,
1583 .run_test = taal_run_test,
1584 .memory_read = taal_memory_read,
1586 .get_timings = taal_get_timings,
1590 .owner = THIS_MODULE,
1594 static int __init taal_init(void)
1596 omap_dss_register_driver(&taal_driver);
1601 static void __exit taal_exit(void)
1603 omap_dss_unregister_driver(&taal_driver);
1606 module_init(taal_init);
1607 module_exit(taal_exit);
1609 MODULE_AUTHOR("Tomi Valkeinen <tomi.valkeinen@nokia.com>");
1610 MODULE_DESCRIPTION("Taal Driver");
1611 MODULE_LICENSE("GPL");