Re: apq8016 : 4.14 kernel dsi bridge/panel not working

Re: apq8016 : 4.14 kernel dsi bridge/panel not working

[Rob Clark]

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 <simhavcs@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
>
> _______________________________________________
> Freedreno mailing list
> Freedreno@lists.freedesktop.org
> https://lists.freedesktop.org/mailman/listinfo/freedreno
>
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Re: apq8016 : 4.14 kernel dsi bridge/panel not working

[Vinay Simha B N]

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dsi is not initialized in lk, since no panel get selected.
[6400] [6400] Device tree exact match the board: <247 65560 0 0x2> == <247
24 2 0x10000>
[6410] [6410] Best match DTB tags 247/00010018/0x00000002/0/2000
b/0/0/0/908b7326/cbdb
[6420] [6420] Using pmic info 0x2000b/0x0/0x0/0x0 for device
0x2000b/0x0/0x0/0x0
[6430] [6430] target_display_panel_node:510: hw_id=24 panel_name=""
[190] [190] Neither 'config' nor 'frp' partition found
[190] [190] Display Init: Start
[200] [200] Not able to search the panel:
[200] [200] Display not enabled for 24 HW type
[200] [200] Target panel init not found!
[210] [210] Display Init: Done

i even tried adding in cmdline for clk_ignore_unused=1 pd_ignore_unused=1.
in this case display will note come even for reboot/resume from suspend.

actually dsi2lvds working in kernel-v4.4.23(kernel-16.09 linaro release)

i do observer the same behaviour in kernel-v4.9.56 (kernel -17.09 linaro
relase) and kernel-v4.14.15(kernel-18.01 linaro relase).

so looks like there are some diffs between v4.4.23 - v4.9.56


On Thu, Apr 12, 2018 at 5:45 AM, Rob Clark <robdclark-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> wrote:

> 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 <simhavcs-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
> 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
> >
> > _______________________________________________
> > Freedreno mailing list
> > Freedreno-PD4FTy7X32lNgt0PjOBp9y5qC8QIuHrW@public.gmane.org
> > https://lists.freedesktop.org/mailman/listinfo/freedreno
> >
>



-- 
regards,
vinaysimha

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