mirror of
git://projects.qi-hardware.com/openwrt-xburst.git
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277 lines
7.8 KiB
Diff
277 lines
7.8 KiB
Diff
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From 62b3330f97b940c715a8931abc7161c99362abaa Mon Sep 17 00:00:00 2001
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From: Nicolas Dufresne <nicolas.dufresne@gmail.com>
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Date: Thu, 4 Dec 2008 17:49:02 +0000
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Subject: [PATCH] jbt6k74_no_deep_sleep.patch
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This patch from
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https://docs.openmoko.org/trac/ticket/1841
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defeats deep sleep on the LCM ASIC and is reported to stop the WSOD
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behaviour on LCMs that exhibit it.
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---
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drivers/video/display/jbt6k74.c | 114 ++++++++++++++++++++++-----------------
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1 files changed, 65 insertions(+), 49 deletions(-)
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diff --git a/drivers/video/display/jbt6k74.c b/drivers/video/display/jbt6k74.c
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index 9570543..0635823 100644
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--- a/drivers/video/display/jbt6k74.c
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+++ b/drivers/video/display/jbt6k74.c
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@@ -252,22 +252,36 @@ static int jbt_init_regs(struct jbt_info *jbt, int qvga)
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return rc ? -EIO : 0;
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}
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-static int standby_to_sleep(struct jbt_info *jbt)
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+int jbt6k74_display_onoff(struct jbt_info *jbt, int on)
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{
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- int rc;
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-
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- /* three times command zero */
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- rc = jbt_reg_write_nodata(jbt, 0x00);
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- mdelay(1);
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- rc |= jbt_reg_write_nodata(jbt, 0x00);
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- mdelay(1);
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- rc |= jbt_reg_write_nodata(jbt, 0x00);
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- mdelay(1);
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-
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- /* deep standby out */
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- rc |= jbt_reg_write(jbt, JBT_REG_POWER_ON_OFF, 0x17);
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+ if (on)
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+ return jbt_reg_write_nodata(jbt, JBT_REG_DISPLAY_ON);
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+ else
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+ return jbt_reg_write_nodata(jbt, JBT_REG_DISPLAY_OFF);
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+}
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+EXPORT_SYMBOL_GPL(jbt6k74_display_onoff);
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- return rc ? -EIO : 0;
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+static int standby_to_sleep(struct jbt_info *jbt)
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+{
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+ static int once = 0;
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+ if (!once++) {
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+ int rc;
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+
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+ /* three times command zero */
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+ rc = jbt_reg_write_nodata(jbt, 0x00);
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+ mdelay(1);
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+ rc |= jbt_reg_write_nodata(jbt, 0x00);
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+ mdelay(1);
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+ rc |= jbt_reg_write_nodata(jbt, 0x00);
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+ mdelay(1);
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+
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+ /* deep standby out */
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+ rc |= jbt_reg_write(jbt, JBT_REG_POWER_ON_OFF, 0x17);
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+
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+ return rc ? -EIO : 0;
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+ }
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+ else
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+ return 0;
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}
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static int sleep_to_normal(struct jbt_info *jbt)
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@@ -292,6 +306,9 @@ static int sleep_to_normal(struct jbt_info *jbt)
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/* initialize register set */
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rc |= jbt_init_regs(jbt, 0);
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+ /* Turn on display */
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+ rc |= jbt6k74_display_onoff(jbt, 1);
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+
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return rc ? -EIO : 0;
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}
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@@ -317,6 +334,9 @@ static int sleep_to_qvga_normal(struct jbt_info *jbt)
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/* initialize register set for qvga*/
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rc |= jbt_init_regs(jbt, 1);
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+ /* Turn on display */
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+ rc |= jbt6k74_display_onoff(jbt, 1);
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+
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return rc ? -EIO : 0;
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}
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@@ -324,7 +344,8 @@ static int normal_to_sleep(struct jbt_info *jbt)
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{
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int rc;
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- rc = jbt_reg_write_nodata(jbt, JBT_REG_DISPLAY_OFF);
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+ rc = jbt6k74_display_onoff(jbt, 0);
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+ rc |= jbt_reg_write_nodata(jbt, JBT_REG_DISPLAY_OFF);
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rc |= jbt_reg_write16(jbt, JBT_REG_OUTPUT_CONTROL, 0x8002);
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rc |= jbt_reg_write_nodata(jbt, JBT_REG_SLEEP_IN);
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@@ -333,7 +354,11 @@ static int normal_to_sleep(struct jbt_info *jbt)
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static int sleep_to_standby(struct jbt_info *jbt)
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{
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+#if 0
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return jbt_reg_write(jbt, JBT_REG_POWER_ON_OFF, 0x00);
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+#else
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+ return 0;
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+#endif
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}
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/* frontend function */
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@@ -436,6 +461,7 @@ int jbt6k74_enter_state(struct jbt_info *jbt, enum jbt_state new_state)
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}
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break;
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}
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+
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if (rc == 0)
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jbt->state = new_state;
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@@ -443,15 +469,6 @@ int jbt6k74_enter_state(struct jbt_info *jbt, enum jbt_state new_state)
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}
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EXPORT_SYMBOL_GPL(jbt6k74_enter_state);
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-int jbt6k74_display_onoff(struct jbt_info *jbt, int on)
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-{
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- if (on)
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- return jbt_reg_write_nodata(jbt, JBT_REG_DISPLAY_ON);
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- else
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- return jbt_reg_write_nodata(jbt, JBT_REG_DISPLAY_OFF);
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-}
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-EXPORT_SYMBOL_GPL(jbt6k74_display_onoff);
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-
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static ssize_t state_read(struct device *dev, struct device_attribute *attr,
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char *buf)
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{
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@@ -475,17 +492,6 @@ static ssize_t state_write(struct device *dev, struct device_attribute *attr,
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rc = jbt6k74_enter_state(jbt, i);
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if (rc)
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return rc;
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- switch (i) {
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- case JBT_STATE_NORMAL:
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- case JBT_STATE_QVGA_NORMAL:
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- /* Enable display again after deep-standby */
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- rc = jbt6k74_display_onoff(jbt, 1);
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- if (rc)
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- return rc;
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- break;
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- default:
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- break;
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- }
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return count;
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}
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}
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@@ -528,6 +534,8 @@ static ssize_t gamma_write(struct device *dev, struct device_attribute *attr,
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int reg = reg_by_string(attr->attr.name);
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unsigned long val = simple_strtoul(buf, NULL, 10);
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+ dev_info(dev, "**** jbt6k74 writing gama %lu\n", val & 0xff);
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+
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jbt_reg_write(jbt, reg, val & 0xff);
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return count;
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@@ -567,19 +575,27 @@ static int fb_notifier_callback(struct notifier_block *self,
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switch (fb_blank) {
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case FB_BLANK_UNBLANK:
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+ dev_info(&jbt->spi_dev->dev, "**** jbt6k74 unblank\n");
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+ break;
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case FB_BLANK_NORMAL:
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- jbt6k74_enter_state(jbt, JBT_STATE_NORMAL);
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- jbt6k74_display_onoff(jbt, 1);
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+ dev_info(&jbt->spi_dev->dev, "**** jbt6k74 normal\n");
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+ /*jbt6k74_enter_state(jbt, JBT_STATE_NORMAL);
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+ jbt6k74_display_onoff(jbt, 1); */
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break;
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case FB_BLANK_VSYNC_SUSPEND:
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+ dev_info(&jbt->spi_dev->dev, "**** jbt6k74 vsync suspend\n");
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+ break;
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case FB_BLANK_HSYNC_SUSPEND:
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+ dev_info(&jbt->spi_dev->dev, "**** jbt6k74 hsync suspend\n");
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/* FIXME: we disable SLEEP since it would result in
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* a visible artefact (white screen) before the backlight
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* is dimmed to a dark enough level */
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/* jbt6k74_enter_state(jbt, JBT_STATE_SLEEP); */
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+ /*jbt6k74_display_onoff(jbt, 0);*/
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break;
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case FB_BLANK_POWERDOWN:
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- jbt6k74_enter_state(jbt, JBT_STATE_DEEP_STANDBY);
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+ dev_info(&jbt->spi_dev->dev, "**** jbt6k74 powerdown\n");
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+ /*jbt6k74_enter_state(jbt, JBT_STATE_DEEP_STANDBY);*/
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break;
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}
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@@ -621,16 +637,10 @@ static int __devinit jbt_probe(struct spi_device *spi)
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goto err_free_drvdata;
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}
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- rc = jbt6k74_display_onoff(jbt, 1);
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- if (rc < 0) {
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- dev_err(&spi->dev, "cannot switch display on\n");
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- goto err_standby;
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- }
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-
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rc = sysfs_create_group(&spi->dev.kobj, &jbt_attr_group);
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if (rc < 0) {
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dev_err(&spi->dev, "cannot create sysfs group\n");
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- goto err_off;
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+ goto err_standby;
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}
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jbt->fb_notif.notifier_call = fb_notifier_callback;
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@@ -644,8 +654,6 @@ static int __devinit jbt_probe(struct spi_device *spi)
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err_sysfs:
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sysfs_remove_group(&spi->dev.kobj, &jbt_attr_group);
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-err_off:
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- jbt6k74_display_onoff(jbt, 0);
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err_standby:
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jbt6k74_enter_state(jbt, JBT_STATE_DEEP_STANDBY);
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err_free_drvdata:
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@@ -676,6 +684,8 @@ static int jbt_suspend(struct spi_device *spi, pm_message_t state)
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struct jbt_info *jbt = dev_get_drvdata(&spi->dev);
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struct jbt6k74_platform_data *jbt6k74_pdata = spi->dev.platform_data;
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+ dev_info(&spi->dev, "**** jbt6k74 suspend start\n");
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+
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/* platform can register resume dependencies here, if any */
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if (jbt6k74_pdata->suspending)
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(jbt6k74_pdata->suspending)(0, spi);
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@@ -689,6 +699,8 @@ static int jbt_suspend(struct spi_device *spi, pm_message_t state)
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/* (jbt6k74_pdata->reset)(0, 0); */
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+ dev_info(&spi->dev, "**** jbt6k74 suspend end\n");
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+
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return 0;
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}
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@@ -697,6 +709,7 @@ int jbt6k74_resume(struct spi_device *spi)
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struct jbt_info *jbt = dev_get_drvdata(&spi->dev);
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struct jbt6k74_platform_data *jbt6k74_pdata = spi->dev.platform_data;
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+ dev_info(&spi->dev, "**** jbt6k74 resume start\n");
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if (jbt6k74_pdata->all_dependencies_resumed)
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if (!(jbt6k74_pdata->all_dependencies_resumed)(0))
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return 0;
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@@ -704,8 +717,10 @@ int jbt6k74_resume(struct spi_device *spi)
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/* we can get called twice with all dependencies resumed if our core
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* resume callback is last of all. Protect against doing anything twice
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*/
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- if (jbt->have_resumed)
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+ if (jbt->have_resumed) {
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+ dev_info(&spi->dev, "**** jbt6k74 already resumed\n");
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return 0;
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+ }
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jbt->have_resumed |= 1;
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@@ -717,11 +732,12 @@ int jbt6k74_resume(struct spi_device *spi)
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jbt6k74_enter_state(jbt, JBT_STATE_NORMAL);
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break;
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}
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- jbt6k74_display_onoff(jbt, 1);
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if (jbt6k74_pdata->resuming)
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(jbt6k74_pdata->resuming)(0);
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+ dev_info(&spi->dev, "**** jbt6k74 resume end\n");
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+
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return 0;
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}
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EXPORT_SYMBOL_GPL(jbt6k74_resume);
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--
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1.5.6.5
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