1 files changed, 447 insertions, 120 deletions

diff --git a/drivers/video/omap2/displays/panel-taal.c b/drivers/video/omap2/displays/panel-taal.c
index aaf5d308a046..e1c765d11419 100644
--- a/drivers/video/omap2/displays/panel-taal.c
+++ b/drivers/video/omap2/displays/panel-taal.c
@@ -28,12 +28,13 @@
 #include <linux/fb.h>
 #include <linux/interrupt.h>
 #include <linux/gpio.h>
-#include <linux/completion.h>
 #include <linux/workqueue.h>
 #include <linux/slab.h>
+#include <linux/regulator/consumer.h>
 #include <linux/mutex.h>
 
 #include <plat/display.h>
+#include <plat/nokia-dsi-panel.h>
 
 /* DSI Virtual channel. Hardcoded for now. */
 #define TCH 0
@@ -62,11 +63,136 @@
 #define DCS_GET_ID2		0xdb
 #define DCS_GET_ID3		0xdc
 
-/* #define TAAL_USE_ESD_CHECK */
 #define TAAL_ESD_CHECK_PERIOD	msecs_to_jiffies(5000)
 
+static irqreturn_t taal_te_isr(int irq, void *data);
+static void taal_te_timeout_work_callback(struct work_struct *work);
 static int _taal_enable_te(struct omap_dss_device *dssdev, bool enable);
 
+struct panel_regulator {
+	struct regulator *regulator;
+	const char *name;
+	int min_uV;
+	int max_uV;
+};
+
+static void free_regulators(struct panel_regulator *regulators, int n)
+{
+	int i;
+
+	for (i = 0; i < n; i++) {
+		/* disable/put in reverse order */
+		regulator_disable(regulators[n - i - 1].regulator);
+		regulator_put(regulators[n - i - 1].regulator);
+	}
+}
+
+static int init_regulators(struct omap_dss_device *dssdev,
+			struct panel_regulator *regulators, int n)
+{
+	int r, i, v;
+
+	for (i = 0; i < n; i++) {
+		struct regulator *reg;
+
+		reg = regulator_get(&dssdev->dev, regulators[i].name);
+		if (IS_ERR(reg)) {
+			dev_err(&dssdev->dev, "failed to get regulator %s\n",
+				regulators[i].name);
+			r = PTR_ERR(reg);
+			goto err;
+		}
+
+		/* FIXME: better handling of fixed vs. variable regulators */
+		v = regulator_get_voltage(reg);
+		if (v < regulators[i].min_uV || v > regulators[i].max_uV) {
+			r = regulator_set_voltage(reg, regulators[i].min_uV,
+						regulators[i].max_uV);
+			if (r) {
+				dev_err(&dssdev->dev,
+					"failed to set regulator %s voltage\n",
+					regulators[i].name);
+				regulator_put(reg);
+				goto err;
+			}
+		}
+
+		r = regulator_enable(reg);
+		if (r) {
+			dev_err(&dssdev->dev, "failed to enable regulator %s\n",
+				regulators[i].name);
+			regulator_put(reg);
+			goto err;
+		}
+
+		regulators[i].regulator = reg;
+	}
+
+	return 0;
+
+err:
+	free_regulators(regulators, i);
+
+	return r;
+}
+
+/**
+ * struct panel_config - panel configuration
+ * @name: panel name
+ * @type: panel type
+ * @timings: panel resolution
+ * @sleep: various panel specific delays, passed to msleep() if non-zero
+ * @reset_sequence: reset sequence timings, passed to udelay() if non-zero
+ * @regulators: array of panel regulators
+ * @num_regulators: number of regulators in the array
+ */
+struct panel_config {
+	const char *name;
+	int type;
+
+	struct omap_video_timings timings;
+
+	struct {
+		unsigned int sleep_in;
+		unsigned int sleep_out;
+		unsigned int hw_reset;
+		unsigned int enable_te;
+	} sleep;
+
+	struct {
+		unsigned int high;
+		unsigned int low;
+	} reset_sequence;
+
+	struct panel_regulator *regulators;
+	int num_regulators;
+};
+
+enum {
+	PANEL_TAAL,
+};
+
+static struct panel_config panel_configs[] = {
+	{
+		.name		= "taal",
+		.type		= PANEL_TAAL,
+		.timings	= {
+			.x_res		= 864,
+			.y_res		= 480,
+		},
+		.sleep		= {
+			.sleep_in	= 5,
+			.sleep_out	= 5,
+			.hw_reset	= 5,
+			.enable_te	= 100, /* possible panel bug */
+		},
+		.reset_sequence	= {
+			.high		= 10,
+			.low		= 10,
+		},
+	},
+};
+
 struct taal_data {
 	struct mutex lock;
 
@@ -84,8 +210,15 @@ struct taal_data {
 	bool mirror;
 
 	bool te_enabled;
-	bool use_ext_te;
-	struct completion te_completion;
+
+	atomic_t do_update;
+	struct {
+		u16 x;
+		u16 y;
+		u16 w;
+		u16 h;
+	} update_region;
+	struct delayed_work te_timeout_work;
 
 	bool use_dsi_bl;
 
@@ -96,8 +229,16 @@ struct taal_data {
 
 	struct workqueue_struct *esd_wq;
 	struct delayed_work esd_work;
+
+	struct panel_config *panel_config;
 };
 
+static inline struct nokia_dsi_panel_data
+*get_panel_data(const struct omap_dss_device *dssdev)
+{
+	return (struct nokia_dsi_panel_data *) dssdev->data;
+}
+
 static void taal_esd_work(struct work_struct *work);
 
 static void hw_guard_start(struct taal_data *td, int guard_msec)
@@ -159,7 +300,8 @@ static int taal_sleep_in(struct taal_data *td)
 
 	hw_guard_start(td, 120);
 
-	msleep(5);
+	if (td->panel_config->sleep.sleep_in)
+		msleep(td->panel_config->sleep.sleep_in);
 
 	return 0;
 }
@@ -176,7 +318,8 @@ static int taal_sleep_out(struct taal_data *td)
 
 	hw_guard_start(td, 120);
 
-	msleep(5);
+	if (td->panel_config->sleep.sleep_out)
+		msleep(td->panel_config->sleep.sleep_out);
 
 	return 0;
 }
@@ -279,6 +422,7 @@ static int taal_bl_update_status(struct backlight_device *dev)
 {
 	struct omap_dss_device *dssdev = dev_get_drvdata(&dev->dev);
 	struct taal_data *td = dev_get_drvdata(&dssdev->dev);
+	struct nokia_dsi_panel_data *panel_data = get_panel_data(dssdev);
 	int r;
 	int level;
 
@@ -290,24 +434,26 @@ static int taal_bl_update_status(struct backlight_device *dev)
 
 	dev_dbg(&dssdev->dev, "update brightness to %d\n", level);
 
+	mutex_lock(&td->lock);
+
 	if (td->use_dsi_bl) {
 		if (td->enabled) {
 			dsi_bus_lock();
 			r = taal_dcs_write_1(DCS_BRIGHTNESS, level);
 			dsi_bus_unlock();
-			if (r)
-				return r;
+		} else {
+			r = 0;
 		}
 	} else {
-		if (!dssdev->set_backlight)
-			return -EINVAL;
-
-		r = dssdev->set_backlight(dssdev, level);
-		if (r)
-			return r;
+		if (!panel_data->set_backlight)
+			r = -EINVAL;
+		else
+			r = panel_data->set_backlight(dssdev, level);
 	}
 
-	return 0;
+	mutex_unlock(&td->lock);
+
+	return r;
 }
 
 static int taal_bl_get_intensity(struct backlight_device *dev)
@@ -344,16 +490,6 @@ static void taal_get_resolution(struct omap_dss_device *dssdev,
 	}
 }
 
-static irqreturn_t taal_te_isr(int irq, void *data)
-{
-	struct omap_dss_device *dssdev = data;
-	struct taal_data *td = dev_get_drvdata(&dssdev->dev);
-
-	complete_all(&td->te_completion);
-
-	return IRQ_HANDLED;
-}
-
 static ssize_t taal_num_errors_show(struct device *dev,
 		struct device_attribute *attr, char *buf)
 {
@@ -362,6 +498,8 @@ static ssize_t taal_num_errors_show(struct device *dev,
 	u8 errors;
 	int r;
 
+	mutex_lock(&td->lock);
+
 	if (td->enabled) {
 		dsi_bus_lock();
 		r = taal_dcs_read_1(DCS_READ_NUM_ERRORS, &errors);
@@ -370,6 +508,8 @@ static ssize_t taal_num_errors_show(struct device *dev,
 		r = -ENODEV;
 	}
 
+	mutex_unlock(&td->lock);
+
 	if (r)
 		return r;
 
@@ -384,6 +524,8 @@ static ssize_t taal_hw_revision_show(struct device *dev,
 	u8 id1, id2, id3;
 	int r;
 
+	mutex_lock(&td->lock);
+
 	if (td->enabled) {
 		dsi_bus_lock();
 		r = taal_get_id(&id1, &id2, &id3);
@@ -392,6 +534,8 @@ static ssize_t taal_hw_revision_show(struct device *dev,
 		r = -ENODEV;
 	}
 
+	mutex_unlock(&td->lock);
+
 	if (r)
 		return r;
 
@@ -441,6 +585,8 @@ static ssize_t store_cabc_mode(struct device *dev,
 	if (i == ARRAY_SIZE(cabc_modes))
 		return -EINVAL;
 
+	mutex_lock(&td->lock);
+
 	if (td->enabled) {
 		dsi_bus_lock();
 		if (!td->cabc_broken)
@@ -450,6 +596,8 @@ static ssize_t store_cabc_mode(struct device *dev,
 
 	td->cabc_mode = i;
 
+	mutex_unlock(&td->lock);
+
 	return count;
 }
 
@@ -488,47 +636,93 @@ static struct attribute_group taal_attr_group = {
 	.attrs = taal_attrs,
 };
 
+static void taal_hw_reset(struct omap_dss_device *dssdev)
+{
+	struct taal_data *td = dev_get_drvdata(&dssdev->dev);
+	struct nokia_dsi_panel_data *panel_data = get_panel_data(dssdev);
+
+	if (panel_data->reset_gpio == -1)
+		return;
+
+	gpio_set_value(panel_data->reset_gpio, 1);
+	if (td->panel_config->reset_sequence.high)
+		udelay(td->panel_config->reset_sequence.high);
+	/* reset the panel */
+	gpio_set_value(panel_data->reset_gpio, 0);
+	/* assert reset */
+	if (td->panel_config->reset_sequence.low)
+		udelay(td->panel_config->reset_sequence.low);
+	gpio_set_value(panel_data->reset_gpio, 1);
+	/* wait after releasing reset */
+	if (td->panel_config->sleep.hw_reset)
+		msleep(td->panel_config->sleep.hw_reset);
+}
+
 static int taal_probe(struct omap_dss_device *dssdev)
 {
 	struct backlight_properties props;
 	struct taal_data *td;
 	struct backlight_device *bldev;
-	int r;
-
-	const struct omap_video_timings taal_panel_timings = {
-		.x_res		= 864,
-		.y_res		= 480,
-	};
+	struct nokia_dsi_panel_data *panel_data = get_panel_data(dssdev);
+	struct panel_config *panel_config = NULL;
+	int r, i;
 
 	dev_dbg(&dssdev->dev, "probe\n");
 
+	if (!panel_data || !panel_data->name) {
+		r = -EINVAL;
+		goto err;
+	}
+
+	for (i = 0; i < ARRAY_SIZE(panel_configs); i++) {
+		if (strcmp(panel_data->name, panel_configs[i].name) == 0) {
+			panel_config = &panel_configs[i];
+			break;
+		}
+	}
+
+	if (!panel_config) {
+		r = -EINVAL;
+		goto err;
+	}
+
 	dssdev->panel.config = OMAP_DSS_LCD_TFT;
-	dssdev->panel.timings = taal_panel_timings;
+	dssdev->panel.timings = panel_config->timings;
 	dssdev->ctrl.pixel_size = 24;
 
 	td = kzalloc(sizeof(*td), GFP_KERNEL);
 	if (!td) {
 		r = -ENOMEM;
-		goto err0;
+		goto err;
 	}
 	td->dssdev = dssdev;
+	td->panel_config = panel_config;
 
 	mutex_init(&td->lock);
 
+	atomic_set(&td->do_update, 0);
+
+	r = init_regulators(dssdev, panel_config->regulators,
+			panel_config->num_regulators);
+	if (r)
+		goto err_reg;
+
 	td->esd_wq = create_singlethread_workqueue("taal_esd");
 	if (td->esd_wq == NULL) {
 		dev_err(&dssdev->dev, "can't create ESD workqueue\n");
 		r = -ENOMEM;
-		goto err1;
+		goto err_wq;
 	}
 	INIT_DELAYED_WORK_DEFERRABLE(&td->esd_work, taal_esd_work);
 
 	dev_set_drvdata(&dssdev->dev, td);
 
+	taal_hw_reset(dssdev);
+
 	/* if no platform set_backlight() defined, presume DSI backlight
 	 * control */
 	memset(&props, 0, sizeof(struct backlight_properties));
-	if (!dssdev->set_backlight)
+	if (!panel_data->set_backlight)
 		td->use_dsi_bl = true;
 
 	if (td->use_dsi_bl)
@@ -539,7 +733,7 @@ static int taal_probe(struct omap_dss_device *dssdev)
 					  &taal_bl_ops, &props);
 	if (IS_ERR(bldev)) {
 		r = PTR_ERR(bldev);
-		goto err2;
+		goto err_bl;
 	}
 
 	td->bldev = bldev;
@@ -553,13 +747,13 @@ static int taal_probe(struct omap_dss_device *dssdev)
 
 	taal_bl_update_status(bldev);
 
-	if (dssdev->phy.dsi.ext_te) {
-		int gpio = dssdev->phy.dsi.ext_te_gpio;
+	if (panel_data->use_ext_te) {
+		int gpio = panel_data->ext_te_gpio;
 
 		r = gpio_request(gpio, "taal irq");
 		if (r) {
 			dev_err(&dssdev->dev, "GPIO request failed\n");
-			goto err3;
+			goto err_gpio;
 		}
 
 		gpio_direction_input(gpio);
@@ -571,49 +765,52 @@ static int taal_probe(struct omap_dss_device *dssdev)
 		if (r) {
 			dev_err(&dssdev->dev, "IRQ request failed\n");
 			gpio_free(gpio);
-			goto err3;
+			goto err_irq;
 		}
 
-		init_completion(&td->te_completion);
+		INIT_DELAYED_WORK_DEFERRABLE(&td->te_timeout_work,
+					taal_te_timeout_work_callback);
 
-		td->use_ext_te = true;
+		dev_dbg(&dssdev->dev, "Using GPIO TE\n");
 	}
 
 	r = sysfs_create_group(&dssdev->dev.kobj, &taal_attr_group);
 	if (r) {
 		dev_err(&dssdev->dev, "failed to create sysfs files\n");
-		goto err4;
+		goto err_sysfs;
 	}
 
 	return 0;
-err4:
-	if (td->use_ext_te) {
-		int gpio = dssdev->phy.dsi.ext_te_gpio;
-		free_irq(gpio_to_irq(gpio), dssdev);
-		gpio_free(gpio);
-	}
-err3:
+err_sysfs:
+	if (panel_data->use_ext_te)
+		free_irq(gpio_to_irq(panel_data->ext_te_gpio), dssdev);
+err_irq:
+	if (panel_data->use_ext_te)
+		gpio_free(panel_data->ext_te_gpio);
+err_gpio:
 	backlight_device_unregister(bldev);
-err2:
-	cancel_delayed_work_sync(&td->esd_work);
+err_bl:
 	destroy_workqueue(td->esd_wq);
-err1:
+err_wq:
+	free_regulators(panel_config->regulators, panel_config->num_regulators);
+err_reg:
 	kfree(td);
-err0:
+err:
 	return r;
 }
 
 static void taal_remove(struct omap_dss_device *dssdev)
 {
 	struct taal_data *td = dev_get_drvdata(&dssdev->dev);
+	struct nokia_dsi_panel_data *panel_data = get_panel_data(dssdev);
 	struct backlight_device *bldev;
 
 	dev_dbg(&dssdev->dev, "remove\n");
 
 	sysfs_remove_group(&dssdev->dev.kobj, &taal_attr_group);
 
-	if (td->use_ext_te) {
-		int gpio = dssdev->phy.dsi.ext_te_gpio;
+	if (panel_data->use_ext_te) {
+		int gpio = panel_data->ext_te_gpio;
 		free_irq(gpio_to_irq(gpio), dssdev);
 		gpio_free(gpio);
 	}
@@ -623,9 +820,15 @@ static void taal_remove(struct omap_dss_device *dssdev)
 	taal_bl_update_status(bldev);
 	backlight_device_unregister(bldev);
 
-	cancel_delayed_work_sync(&td->esd_work);
+	cancel_delayed_work(&td->esd_work);
 	destroy_workqueue(td->esd_wq);
 
+	/* reset, to be sure that the panel is in a valid state */
+	taal_hw_reset(dssdev);
+
+	free_regulators(td->panel_config->regulators,
+			td->panel_config->num_regulators);
+
 	kfree(td);
 }
 
@@ -635,23 +838,14 @@ static int taal_power_on(struct omap_dss_device *dssdev)
 	u8 id1, id2, id3;
 	int r;
 
-	if (dssdev->platform_enable) {
-		r = dssdev->platform_enable(dssdev);
-		if (r)
-			return r;
-	}
-
-	/* it seems we have to wait a bit until taal is ready */
-	msleep(5);
-
-	dsi_bus_lock();
-
 	r = omapdss_dsi_display_enable(dssdev);
 	if (r) {
 		dev_err(&dssdev->dev, "failed to enable DSI\n");
 		goto err0;
 	}
 
+	taal_hw_reset(dssdev);
+
 	omapdss_dsi_vc_enable_hs(TCH, false);
 
 	r = taal_sleep_out(td);
@@ -662,34 +856,47 @@ static int taal_power_on(struct omap_dss_device *dssdev)
 	if (r)
 		goto err;
 
-	/* on early revisions CABC is broken */
-	if (id2 == 0x00 || id2 == 0xff || id2 == 0x81)
+	/* on early Taal revisions CABC is broken */
+	if (td->panel_config->type == PANEL_TAAL &&
+		(id2 == 0x00 || id2 == 0xff || id2 == 0x81))
 		td->cabc_broken = true;
 
-	taal_dcs_write_1(DCS_BRIGHTNESS, 0xff);
-	taal_dcs_write_1(DCS_CTRL_DISPLAY, (1<<2) | (1<<5)); /* BL | BCTRL */
+	r = taal_dcs_write_1(DCS_BRIGHTNESS, 0xff);
+	if (r)
+		goto err;
+
+	r = taal_dcs_write_1(DCS_CTRL_DISPLAY,
+			(1<<2) | (1<<5));	/* BL | BCTRL */
+	if (r)
+		goto err;
+
+	r = taal_dcs_write_1(DCS_PIXEL_FORMAT, 0x7); /* 24bit/pixel */
+	if (r)
+		goto err;
 
-	taal_dcs_write_1(DCS_PIXEL_FORMAT, 0x7); /* 24bit/pixel */
+	r = taal_set_addr_mode(td->rotate, td->mirror);
+	if (r)
+		goto err;
 
-	taal_set_addr_mode(td->rotate, td->mirror);
-	if (!td->cabc_broken)
-		taal_dcs_write_1(DCS_WRITE_CABC, td->cabc_mode);
+	if (!td->cabc_broken) {
+		r = taal_dcs_write_1(DCS_WRITE_CABC, td->cabc_mode);
+		if (r)
+			goto err;
+	}
 
-	taal_dcs_write_0(DCS_DISPLAY_ON);
+	r = taal_dcs_write_0(DCS_DISPLAY_ON);
+	if (r)
+		goto err;
 
 	r = _taal_enable_te(dssdev, td->te_enabled);
 	if (r)
 		goto err;
 
-#ifdef TAAL_USE_ESD_CHECK
-	queue_delayed_work(td->esd_wq, &td->esd_work, TAAL_ESD_CHECK_PERIOD);
-#endif
-
 	td->enabled = 1;
 
 	if (!td->intro_printed) {
-		dev_info(&dssdev->dev, "revision %02x.%02x.%02x\n",
-				id1, id2, id3);
+		dev_info(&dssdev->dev, "%s panel revision %02x.%02x.%02x\n",
+			td->panel_config->name, id1, id2, id3);
 		if (td->cabc_broken)
 			dev_info(&dssdev->dev,
 					"old Taal version, CABC disabled\n");
@@ -698,46 +905,44 @@ static int taal_power_on(struct omap_dss_device *dssdev)
 
 	omapdss_dsi_vc_enable_hs(TCH, true);
 
-	dsi_bus_unlock();
-
 	return 0;
 err:
+	dev_err(&dssdev->dev, "error while enabling panel, issuing HW reset\n");
+
+	taal_hw_reset(dssdev);
+
 	omapdss_dsi_display_disable(dssdev);
 err0:
-	dsi_bus_unlock();
-	if (dssdev->platform_disable)
-		dssdev->platform_disable(dssdev);
-
 	return r;
 }
 
 static void taal_power_off(struct omap_dss_device *dssdev)
 {
 	struct taal_data *td = dev_get_drvdata(&dssdev->dev);
+	int r;
 
-	dsi_bus_lock();
-
-	cancel_delayed_work(&td->esd_work);
-
-	taal_dcs_write_0(DCS_DISPLAY_OFF);
-	taal_sleep_in(td);
+	r = taal_dcs_write_0(DCS_DISPLAY_OFF);
+	if (!r) {
+		r = taal_sleep_in(td);
+		/* HACK: wait a bit so that the message goes through */
+		msleep(10);
+	}
 
-	/* wait a bit so that the message goes through */
-	msleep(10);
+	if (r) {
+		dev_err(&dssdev->dev,
+				"error disabling panel, issuing HW reset\n");
+		taal_hw_reset(dssdev);
+	}
 
 	omapdss_dsi_display_disable(dssdev);
 
-	if (dssdev->platform_disable)
-		dssdev->platform_disable(dssdev);
-
 	td->enabled = 0;
-
-	dsi_bus_unlock();
 }
 
 static int taal_enable(struct omap_dss_device *dssdev)
 {
 	struct taal_data *td = dev_get_drvdata(&dssdev->dev);
+	struct nokia_dsi_panel_data *panel_data = get_panel_data(dssdev);
 	int r;
 
 	dev_dbg(&dssdev->dev, "enable\n");
@@ -749,10 +954,19 @@ static int taal_enable(struct omap_dss_device *dssdev)
 		goto err;
 	}
 
+	dsi_bus_lock();
+
 	r = taal_power_on(dssdev);
+
+	dsi_bus_unlock();
+
 	if (r)
 		goto err;
 
+	if (panel_data->use_esd_check)
+		queue_delayed_work(td->esd_wq, &td->esd_work,
+				TAAL_ESD_CHECK_PERIOD);
+
 	dssdev->state = OMAP_DSS_DISPLAY_ACTIVE;
 
 	mutex_unlock(&td->lock);
@@ -772,9 +986,15 @@ static void taal_disable(struct omap_dss_device *dssdev)
 
 	mutex_lock(&td->lock);
 
+	cancel_delayed_work(&td->esd_work);
+
+	dsi_bus_lock();
+
 	if (dssdev->state == OMAP_DSS_DISPLAY_ACTIVE)
 		taal_power_off(dssdev);
 
+	dsi_bus_unlock();
+
 	dssdev->state = OMAP_DSS_DISPLAY_DISABLED;
 
 	mutex_unlock(&td->lock);
@@ -794,7 +1014,14 @@ static int taal_suspend(struct omap_dss_device *dssdev)
 		goto err;
 	}
 
+	cancel_delayed_work(&td->esd_work);
+
+	dsi_bus_lock();
+
 	taal_power_off(dssdev);
+
+	dsi_bus_unlock();
+
 	dssdev->state = OMAP_DSS_DISPLAY_SUSPENDED;
 
 	mutex_unlock(&td->lock);
@@ -808,6 +1035,7 @@ err:
 static int taal_resume(struct omap_dss_device *dssdev)
 {
 	struct taal_data *td = dev_get_drvdata(&dssdev->dev);
+	struct nokia_dsi_panel_data *panel_data = get_panel_data(dssdev);
 	int r;
 
 	dev_dbg(&dssdev->dev, "resume\n");
@@ -819,8 +1047,20 @@ static int taal_resume(struct omap_dss_device *dssdev)
 		goto err;
 	}
 
+	dsi_bus_lock();
+
 	r = taal_power_on(dssdev);
-	dssdev->state = OMAP_DSS_DISPLAY_ACTIVE;
+
+	dsi_bus_unlock();
+
+	if (r) {
+		dssdev->state = OMAP_DSS_DISPLAY_DISABLED;
+	} else {
+		dssdev->state = OMAP_DSS_DISPLAY_ACTIVE;
+		if (panel_data->use_esd_check)
+			queue_delayed_work(td->esd_wq, &td->esd_work,
+					TAAL_ESD_CHECK_PERIOD);
+	}
 
 	mutex_unlock(&td->lock);
 
@@ -837,10 +1077,52 @@ static void taal_framedone_cb(int err, void *data)
 	dsi_bus_unlock();
 }
 
+static irqreturn_t taal_te_isr(int irq, void *data)
+{
+	struct omap_dss_device *dssdev = data;
+	struct taal_data *td = dev_get_drvdata(&dssdev->dev);
+	int old;
+	int r;
+
+	old = atomic_cmpxchg(&td->do_update, 1, 0);
+
+	if (old) {
+		cancel_delayed_work(&td->te_timeout_work);
+
+		r = omap_dsi_update(dssdev, TCH,
+				td->update_region.x,
+				td->update_region.y,
+				td->update_region.w,
+				td->update_region.h,
+				taal_framedone_cb, dssdev);
+		if (r)
+			goto err;
+	}
+
+	return IRQ_HANDLED;
+err:
+	dev_err(&dssdev->dev, "start update failed\n");
+	dsi_bus_unlock();
+	return IRQ_HANDLED;
+}
+
+static void taal_te_timeout_work_callback(struct work_struct *work)
+{
+	struct taal_data *td = container_of(work, struct taal_data,
+					te_timeout_work.work);
+	struct omap_dss_device *dssdev = td->dssdev;
+
+	dev_err(&dssdev->dev, "TE not received for 250ms!\n");
+
+	atomic_set(&td->do_update, 0);
+	dsi_bus_unlock();
+}
+
 static int taal_update(struct omap_dss_device *dssdev,
 				    u16 x, u16 y, u16 w, u16 h)
 {
 	struct taal_data *td = dev_get_drvdata(&dssdev->dev);
+	struct nokia_dsi_panel_data *panel_data = get_panel_data(dssdev);
 	int r;
 
 	dev_dbg(&dssdev->dev, "update %d, %d, %d x %d\n", x, y, w, h);
@@ -853,7 +1135,7 @@ static int taal_update(struct omap_dss_device *dssdev,
 		goto err;
 	}
 
-	r = omap_dsi_prepare_update(dssdev, &x, &y, &w, &h);
+	r = omap_dsi_prepare_update(dssdev, &x, &y, &w, &h, true);
 	if (r)
 		goto err;
 
@@ -861,10 +1143,21 @@ static int taal_update(struct omap_dss_device *dssdev,
 	if (r)
 		goto err;
 
-	r = omap_dsi_update(dssdev, TCH, x, y, w, h,
-			taal_framedone_cb, dssdev);
-	if (r)
-		goto err;
+	if (td->te_enabled && panel_data->use_ext_te) {
+		td->update_region.x = x;
+		td->update_region.y = y;
+		td->update_region.w = w;
+		td->update_region.h = h;
+		barrier();
+		schedule_delayed_work(&td->te_timeout_work,
+				msecs_to_jiffies(250));
+		atomic_set(&td->do_update, 1);
+	} else {
+		r = omap_dsi_update(dssdev, TCH, x, y, w, h,
+				taal_framedone_cb, dssdev);
+		if (r)
+			goto err;
+	}
 
 	/* note: no bus_unlock here. unlock is in framedone_cb */
 	mutex_unlock(&td->lock);
@@ -894,20 +1187,19 @@ static int taal_sync(struct omap_dss_device *dssdev)
 static int _taal_enable_te(struct omap_dss_device *dssdev, bool enable)
 {
 	struct taal_data *td = dev_get_drvdata(&dssdev->dev);
+	struct nokia_dsi_panel_data *panel_data = get_panel_data(dssdev);
 	int r;
 
-	td->te_enabled = enable;
-
 	if (enable)
 		r = taal_dcs_write_1(DCS_TEAR_ON, 0);
 	else
 		r = taal_dcs_write_0(DCS_TEAR_OFF);
 
-	omapdss_dsi_enable_te(dssdev, enable);
+	if (!panel_data->use_ext_te)
+		omapdss_dsi_enable_te(dssdev, enable);
 
-	/* XXX for some reason, DSI TE breaks if we don't wait here.
-	 * Panel bug? Needs more studying */
-	msleep(100);
+	if (td->panel_config->sleep.enable_te)
+		msleep(td->panel_config->sleep.enable_te);
 
 	return r;
 }
@@ -918,10 +1210,26 @@ static int taal_enable_te(struct omap_dss_device *dssdev, bool enable)
 	int r;
 
 	mutex_lock(&td->lock);
+
+	if (td->te_enabled == enable)
+		goto end;
+
 	dsi_bus_lock();
 
-	r = _taal_enable_te(dssdev, enable);
+	if (td->enabled) {
+		r = _taal_enable_te(dssdev, enable);
+		if (r)
+			goto err;
+	}
+
+	td->te_enabled = enable;
+
+	dsi_bus_unlock();
+end:
+	mutex_unlock(&td->lock);
 
+	return 0;
+err:
 	dsi_bus_unlock();
 	mutex_unlock(&td->lock);
 
@@ -948,6 +1256,10 @@ static int taal_rotate(struct omap_dss_device *dssdev, u8 rotate)
 	dev_dbg(&dssdev->dev, "rotate %d\n", rotate);
 
 	mutex_lock(&td->lock);
+
+	if (td->rotate == rotate)
+		goto end;
+
 	dsi_bus_lock();
 
 	if (td->enabled) {
@@ -959,6 +1271,7 @@ static int taal_rotate(struct omap_dss_device *dssdev, u8 rotate)
 	td->rotate = rotate;
 
 	dsi_bus_unlock();
+end:
 	mutex_unlock(&td->lock);
 	return 0;
 err:
@@ -987,6 +1300,10 @@ static int taal_mirror(struct omap_dss_device *dssdev, bool enable)
 	dev_dbg(&dssdev->dev, "mirror %d\n", enable);
 
 	mutex_lock(&td->lock);
+
+	if (td->mirror == enable)
+		goto end;
+
 	dsi_bus_lock();
 	if (td->enabled) {
 		r = taal_set_addr_mode(td->rotate, enable);
@@ -997,6 +1314,7 @@ static int taal_mirror(struct omap_dss_device *dssdev, bool enable)
 	td->mirror = enable;
 
 	dsi_bus_unlock();
+end:
 	mutex_unlock(&td->lock);
 	return 0;
 err:
@@ -1024,23 +1342,30 @@ static int taal_run_test(struct omap_dss_device *dssdev, int test_num)
 	int r;
 
 	mutex_lock(&td->lock);
+
+	if (!td->enabled) {
+		r = -ENODEV;
+		goto err1;
+	}
+
 	dsi_bus_lock();
 
 	r = taal_dcs_read_1(DCS_GET_ID1, &id1);
 	if (r)
-		goto err;
+		goto err2;
 	r = taal_dcs_read_1(DCS_GET_ID2, &id2);
 	if (r)
-		goto err;
+		goto err2;
 	r = taal_dcs_read_1(DCS_GET_ID3, &id3);
 	if (r)
-		goto err;
+		goto err2;
 
 	dsi_bus_unlock();
 	mutex_unlock(&td->lock);
 	return 0;
-err:
+err2:
 	dsi_bus_unlock();
+err1:
 	mutex_unlock(&td->lock);
 	return r;
 }
@@ -1128,6 +1453,7 @@ static void taal_esd_work(struct work_struct *work)
 	struct taal_data *td = container_of(work, struct taal_data,
 			esd_work.work);
 	struct omap_dss_device *dssdev = td->dssdev;
+	struct nokia_dsi_panel_data *panel_data = get_panel_data(dssdev);
 	u8 state1, state2;
 	int r;
 
@@ -1168,7 +1494,7 @@ static void taal_esd_work(struct work_struct *work)
 	}
 	/* Self-diagnostics result is also shown on TE GPIO line. We need
 	 * to re-enable TE after self diagnostics */
-	if (td->use_ext_te && td->te_enabled) {
+	if (td->te_enabled && panel_data->use_ext_te) {
 		r = taal_dcs_write_1(DCS_TEAR_ON, 0);
 		if (r)
 			goto err;
@@ -1184,6 +1510,7 @@ err:
 	dev_err(&dssdev->dev, "performing LCD reset\n");
 
 	taal_power_off(dssdev);
+	taal_hw_reset(dssdev);
 	taal_power_on(dssdev);
 
 	dsi_bus_unlock();