Hi Huang, On Thu, Feb 26, 2015 at 9:09 AM, huang lin <hl at rock-chips.com> wrote: > Add backlight-boot-off property, so we can keeping the > backlight disabled at boot until it is enabled implicitly > by a panel driver, or explicitly by userspace > > Signed-off-by: huang lin <hl at rock-chips.com> > > --- > > drivers/video/backlight/pwm_bl.c | 4 ++++ > 1 file changed, 4 insertions(+) > > diff --git a/drivers/video/backlight/pwm_bl.c b/drivers/video/backlight/pwm_bl.c > index 3a145a6..dece351 100644 > --- a/drivers/video/backlight/pwm_bl.c > +++ b/drivers/video/backlight/pwm_bl.c > @@ -319,6 +319,10 @@ static int pwm_backlight_probe(struct platform_device *pdev) > } > > bl->props.brightness = data->dft_brightness; > + > + if (of_find_property(pdev->dev.of_node, "backlight-boot-off", NULL)) > + bl->props.power = FB_BLANK_POWERDOWN; > + You need to check this. Originally, Thierry proposed it. http://permalink.gmane.org/gmane.linux.drivers.devicetree/84604 > backlight_update_status(bl); > > platform_set_drvdata(pdev, bl); > -- > 1.9.1 > > > -- > To unsubscribe from this list: send the line "unsubscribe linux-fbdev" in > the body of a message to majordomo at vger.kernel.org > More majordomo info at http://vger.kernel.org/majordomo-info.html
