Re: HDMI isn't probed on v5.15-rc1 on ULCB+KF

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Hello Morimoto-san,

For some reason this mail hadn't made it to the list, nor to my inbox.

On Thu, Nov 04, 2021 at 08:23:15AM +0900, Kuninori Morimoto wrote:
> 
> Hi Kieran
> 
> > > > =>      [    1.485684] rcar-dw-hdmi fead0000.hdmi: Detected HDMI TX controller v2.01a with HDCP (DWC HDMI 2.0 TX PHY)
> > > > =>      [    1.496248] rcar-dw-hdmi fead0000.hdmi: registered DesignWare HDMI I2C bus driver
> > > >         [    1.535173] loop: module loaded
> > > >         ...
> > > >
> > > > This is NG case.
> > > > DAM failed. rcar-dw-hdmi is not probed.
> > 
> > Was something changed to make this happen between this and the above
> > test?
> 
> Only reverting the issue patch.
> 
> > > Note that in both cases feb00000.display failed to probe first
> > > Is this an fw_devlink issue, due to HDMI linking to DU in DT?
> > > Does it work with fw_devlink=permissive of fw_devlink=off?
> > 
> > The DT is all connected up with the ports as I would expect them on
> > ulcb+kf, but I saw the unanswered question from Geert above. Could you
> > check that please?
> 
> In my understanding, Laurent answered it at private meeting.
> He said it is not related, if my memory was correct.
> 
> > Is there anything else specific to replicating this issue? Is it only on
> > the ULCB+KF? Or does it occur on Salvator-XS too? (And does it need a
> > specific kernel config to reproduce?)
> 
> I could reproduce the same issue on Salvator-XS.
> I attached my .config on this mail.

[snip]

> # CONFIG_DRM_DISPLAY_CONNECTOR is not set

Enabling this option should help.

-- 
Regards,

Laurent Pinchart



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