On Thu, Feb 26, 2015 at 1:36 PM, hl <hl at rock-chips.com> wrote: > > On 2015?02?26? 13:47, Ajay kumar wrote: >> >> 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 > > I have applied Thierry patch , and it can work. I think it should be merged, > since i use three type of edp panels, > they have same issue: when the backlight probe, the panel will visual > glitches. Right, the same problem exists on Exynos5800-peach-pi display! I had tested this long back, and I think its not merged since the DT property has an issue that "it doesn't really represent h/w property of the device". >> >>> 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 >> >> >> > > -- > ?? > ??????????? > Fuzhou Rockchip Electronics Co.Ltd > ?????????????89????A?21??(350003) > Addr:No.21 Building, A District, No.89, software Boulevard Fuzhou, > Fujian,PRC > Email:hl at rock-chips.com > Tel:+86-591-83991906/07 > > **************************************************************************************** > ???????????????????????????????????????????? > ???? ???????????????????????????????????????? > ???????????????????????????????????????????? > ?????????????????? > IMPORTANT NOTICE: This email is from Fuzhou Rockchip Electronics Co., Ltd > .The contents > of this email and any attachments may contain information that is > privileged, confidential > and/or exempt from disclosure under applicable law and relevant NDA. If you > are not the > intended recipient, you are hereby notified that any disclosure, copying, > distribution, > or use of the information is STRICTLY PROHIBITED. Please immediately contact > the sender > as soon as possible and destroy the material in its entirety in any format. > Thank you. > ******************************************************************************** >
