This patch supports early fb event of fb_blank().
- In case of lcd power off : call early_set_power() interface and lcd
power is off. And then framebuffer is blanked.
- In case of lcd power on : First, framebuffer is unblanked, and then
call set_power() interface to turn lcd on.
Signed-off-by: Donghwa Lee <dh09.lee@xxxxxxxxxxx>
Signed-off-by: Inki Dae <inki.dae@xxxxxxxxxxx>
Signed-off-by: Kyungmin Park <kyungmin.park@xxxxxxxxxxx>
---
drivers/video/backlight/ld9040.c | 36 +++++++++++++++++++++++++++++++++++-
1 files changed, 35 insertions(+), 1 deletions(-)
diff --git a/drivers/video/backlight/ld9040.c b/drivers/video/backlight/ld9040.c
index efd352b..221c843 100644
--- a/drivers/video/backlight/ld9040.c
+++ b/drivers/video/backlight/ld9040.c
@@ -642,17 +642,50 @@ static int ld9040_power(struct ld9040 *lcd, int power)
return ret;
}
+static int ld9040_early_set_power(struct lcd_device *ld, int power)
+{
+ struct ld9040 *lcd = lcd_get_data(ld);
+ int ret = 0;
+
+ if (power != FB_BLANK_UNBLANK && power != FB_BLANK_POWERDOWN &&
+ power != FB_BLANK_NORMAL) {
+ dev_err(lcd->dev, "power value should be 0, 1 or 4.\n");
+
+ return -EINVAL;
+ }
+
+ if (!power_is_on(power) && power_is_on(lcd->power)) {
+ ret = ld9040_power(lcd, power);
+ if (!ret)
+ lcd->power = power;
+ }
+
+ return ret;
+}
+
static int ld9040_set_power(struct lcd_device *ld, int power)
{
struct ld9040 *lcd = lcd_get_data(ld);
+ struct backlight_device *bd = lcd->bd;
+ int ret = 0;
if (power != FB_BLANK_UNBLANK && power != FB_BLANK_POWERDOWN &&
power != FB_BLANK_NORMAL) {
dev_err(lcd->dev, "power value should be 0, 1 or 4.\n");
+
return -EINVAL;
}
- return ld9040_power(lcd, power);
+ if (power_is_on(power) && !power_is_on(lcd->power)) {
+ ret = ld9040_power(lcd, power);
+ if (!ret)
+ lcd->power = power;
+
+ ld9040_gamma_ctl(lcd, bd->props.brightness);
+ } else
+ ld9040_early_set_power(ld, power);
+
+ return ret;
}
static int ld9040_get_power(struct lcd_device *ld)
@@ -689,6 +722,7 @@ static int ld9040_set_brightness(struct backlight_device *bd)
}
static struct lcd_ops ld9040_lcd_ops = {
+ .early_set_power = ld9040_early_set_power,
.set_power = ld9040_set_power,
.get_power = ld9040_get_power,
};
--
1.7.4.1
--
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