From 6ecab98a3b8632e127c230611fe4c2c4ecc1d3c7 Mon Sep 17 00:00:00 2001
From: Andy Green <andy@openmoko.com>
Date: Wed, 19 Nov 2008 17:11:17 +0000
Subject: meddle-wsod.patch

Signed-off-by: Andy Green <andy@openmoko.com>
---
 drivers/video/display/jbt6k74.c | 82 ++++++++++++++++++++++++++++++++++++++++-
 1 file changed, 81 insertions(+), 1 deletion(-)

(limited to 'drivers/video')

diff --git a/drivers/video/display/jbt6k74.c b/drivers/video/display/jbt6k74.c
index 77f9528ff5a..754ac02213b 100644
--- a/drivers/video/display/jbt6k74.c
+++ b/drivers/video/display/jbt6k74.c
@@ -533,10 +533,51 @@ static ssize_t gamma_write(struct device *dev, struct device_attribute *attr,
 	return count;
 }
 
+static ssize_t reset_write(struct device *dev, struct device_attribute *attr,
+			   const char *buf, size_t count)
+{
+	struct jbt_info *jbt = dev_get_drvdata(dev);
+	struct jbt6k74_platform_data *jbt6k74_pdata = jbt->spi_dev->dev.platform_data;
+	int rc;
+
+	dev_info(dev, "**** jbt6k74 reset\n");
+
+	/* hard reset the jbt6k74 */
+
+	(jbt6k74_pdata->reset)(0, 0);
+	mdelay(1);
+	(jbt6k74_pdata->reset)(0, 1);
+	mdelay(120);
+
+	rc = jbt_reg_write_nodata(jbt, 0x01);
+	if (rc < 0)
+		dev_err(dev, "cannot soft reset\n");
+
+	mdelay(120);
+
+	jbt->state = JBT_STATE_DEEP_STANDBY;
+
+	switch (jbt->last_state) {
+	case JBT_STATE_QVGA_NORMAL:
+		jbt6k74_enter_state(jbt, JBT_STATE_QVGA_NORMAL);
+		break;
+	default:
+		jbt6k74_enter_state(jbt, JBT_STATE_NORMAL);
+		break;
+	}
+
+	rc = jbt6k74_display_onoff(jbt, 1);
+	if (rc < 0)
+		dev_err(dev, "cannot switch display on\n");
+
+	return count;
+}
+
 static DEVICE_ATTR(gamma_fine1, 0644, gamma_read, gamma_write);
 static DEVICE_ATTR(gamma_fine2, 0644, gamma_read, gamma_write);
 static DEVICE_ATTR(gamma_inclination, 0644, gamma_read, gamma_write);
 static DEVICE_ATTR(gamma_blue_offset, 0644, gamma_read, gamma_write);
+static DEVICE_ATTR(reset, 0600, NULL, reset_write);
 
 static struct attribute *jbt_sysfs_entries[] = {
 	&dev_attr_state.attr,
@@ -544,6 +585,7 @@ static struct attribute *jbt_sysfs_entries[] = {
 	&dev_attr_gamma_fine2.attr,
 	&dev_attr_gamma_inclination.attr,
 	&dev_attr_gamma_blue_offset.attr,
+	&dev_attr_reset.attr,
 	NULL,
 };
 
@@ -592,6 +634,7 @@ static int __devinit jbt_probe(struct spi_device *spi)
 {
 	int rc;
 	struct jbt_info *jbt;
+	struct jbt6k74_platform_data *jbt6k74_pdata = spi->dev.platform_data;
 
 	/* the controller doesn't have a MISO pin; we can't do detection */
 
@@ -615,6 +658,20 @@ static int __devinit jbt_probe(struct spi_device *spi)
 
 	dev_set_drvdata(&spi->dev, jbt);
 
+	/* hard reset the jbt6k74 */
+
+	(jbt6k74_pdata->reset)(0, 0);
+	mdelay(1);
+	(jbt6k74_pdata->reset)(0, 1);
+	mdelay(120);
+
+	rc = jbt_reg_write_nodata(jbt, 0x01);
+	if (rc < 0)
+		dev_err(&spi->dev, "cannot soft reset\n");
+
+	mdelay(120);
+
+
 	rc = jbt6k74_enter_state(jbt, JBT_STATE_NORMAL);
 	if (rc < 0) {
 		dev_err(&spi->dev, "cannot enter NORMAL state\n");
@@ -691,7 +748,25 @@ int jbt6k74_resume(struct spi_device *spi)
 {
 	struct jbt_info *jbt = dev_get_drvdata(&spi->dev);
 	struct jbt6k74_platform_data *jbt6k74_pdata = spi->dev.platform_data;
+	int rc;
 
+	dev_info(&spi->dev, "**** jbt6k74 resume start\n");
+
+	/* hard reset the jbt6k74 */
+
+	(jbt6k74_pdata->reset)(0, 0);
+	mdelay(1);
+	(jbt6k74_pdata->reset)(0, 1);
+	mdelay(120);
+
+	rc = jbt_reg_write_nodata(jbt, 0x01);
+	if (rc < 0)
+		dev_err(&spi->dev, "cannot soft reset\n");
+
+	mdelay(120);
+
+	jbt->state = JBT_STATE_DEEP_STANDBY;
+	
 	switch (jbt->last_state) {
 	case JBT_STATE_QVGA_NORMAL:
 		jbt6k74_enter_state(jbt, JBT_STATE_QVGA_NORMAL);
@@ -700,11 +775,16 @@ int jbt6k74_resume(struct spi_device *spi)
 		jbt6k74_enter_state(jbt, JBT_STATE_NORMAL);
 		break;
 	}
-	jbt6k74_display_onoff(jbt, 1);
+
+	rc = jbt6k74_display_onoff(jbt, 1);
+	if (rc < 0)
+		dev_err(&spi->dev, "cannot switch display on\n");
 
 	if (jbt6k74_pdata->resuming)
 		(jbt6k74_pdata->resuming)(0);
 
+	dev_info(&spi->dev, "**** jbt6k74 resume end\n");
+
 	return 0;
 }
 EXPORT_SYMBOL_GPL(jbt6k74_resume);
-- 
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