I'm not sure if this is any way related to (since you mentioned
regression btwn 4.9 and 4.14):

https://lists.freedesktop.org/archives/dri-devel/2018-April/172152.html

given the mention of working when resume from suspend, I might suggest
to try disabling bootloader enabling the display (ie. for splash
screen), since that can cause plenty of issues

BR,
-R

On Wed, Apr 11, 2018 at 12:38 PM, Vinay Simha B N <simha...@gmail.com> wrote:
> hi,
>
> we have apq8016 : IFC6309 board (ref : 410c snapdragon), dsi2lvds interfaced
> to the board, dsi2lvds working fine in 4.9 kernel  , but the same dsi2lvds
> driver in 4.14 kernel it works only when system comes resumes from suspend
> or when i issue the reboot command.
> It does not works when it boots, please suggest.
>
> attached kernel log
> https://pastebin.com/TUNWecQR
>
> kernel src
> https://github.com/vinaysimhabn/msm/commits/kernel-18.01-lvdsv1.0
>
>
> --
> regards,
> vinaysimha
>
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