# Re: \[PATCH V5 1/2\] backlight: qcom-wled: Fix FSC update issue for WLED5

- From: Lee Jones \<hidden\>
- Date: 2021-03-22 17:35:17 
- List: linux-fbdev
- Page: https://ratatoskr.run/linux-fbdev/2021/03/6311056
- Thread: https://ratatoskr.run/dri-devel/2021/03/6306295/t.md

```text
On Thu, 18 Mar 2021, Kiran Gunda wrote:

> Currently, for WLED5, the FSC (Full scale current) setting is not
> updated properly due to driver toggling the wrong register after
> an FSC update.
> 
> On WLED5 we should only toggle the MOD_SYNC bit after a brightness
> update. For an FSC update we need to toggle the SYNC bits instead.
> 
> Fix it by adopting the common wled3_sync_toggle() for WLED5 and
> introducing new code to the brightness update path to compensate.
> 
> Signed-off-by: Kiran Gunda <redacted>
> Reviewed-by: Daniel Thompson <redacted>
> ---
>  drivers/video/backlight/qcom-wled.c | 25 +++++++++++++++++++------
>  1 file changed, 19 insertions(+), 6 deletions(-)

Applied, thanks.

-- 
Lee Jones [李琼斯]
Senior Technical Lead - Developer Services
Linaro.org │ Open source software for Arm SoCs
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```