linux-kernel - Re: [PATCH] drm: display: Set fwnode for aux bus devices

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Message-ID: <CAGETcx_nSoVy-C-pt0Q3e-4wsU--9MJKoxr2ZSUfVq1UBxMjow@mail.gmail.com>
Date: Wed, 23 Oct 2024 23:22:04 -0700
From: Saravana Kannan <saravanak@...gle.com>
To: Nícolas F. R. A. Prado <nfraprado@...labora.com>
Cc: Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>, Maxime Ripard <mripard@...nel.org>, 
	Thomas Zimmermann <tzimmermann@...e.de>, David Airlie <airlied@...il.com>, Simona Vetter <simona@...ll.ch>, 
	Matthias Brugger <matthias.bgg@...il.com>, 
	AngeloGioacchino Del Regno <angelogioacchino.delregno@...labora.com>, Jon Hunter <jonathanh@...dia.com>, 
	kernel-team@...roid.com, dri-devel@...ts.freedesktop.org, 
	linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org, 
	linux-mediatek@...ts.infradead.org
Subject: Re: [PATCH] drm: display: Set fwnode for aux bus devices

On Wed, Oct 23, 2024 at 12:56 PM Nícolas F. R. A. Prado
<nfraprado@...labora.com> wrote:
>
> On Wed, Oct 23, 2024 at 12:13:36PM -0700, Saravana Kannan wrote:
> > fwnode needs to be set for a device for fw_devlink to be able to
> > track/enforce its dependencies correctly. Without this, you'll see error
> > messages like this when the supplier has probed and tries to make sure
> > all its fwnode consumers are linked to it using device links:
> >
> > mediatek-drm-dp 1c500000.edp-tx: Failed to create device link (0x180) with backlight-lcd0
> > tegra-xusb-padctl 3520000.padctl: Failed to create device link (0x180) with 1-0008
> >
> > Reported-by: "Nícolas F. R. A. Prado" <nfraprado@...labora.com>
> > Closes: https://lore.kernel.org/all/7b995947-4540-4b17-872e-e107adca4598@notapiano/
> > Tested-by: "Nícolas F. R. A. Prado" <nfraprado@...labora.com>
> > Reported-by: Jon Hunter <jonathanh@...dia.com>
> > Closes: https://lore.kernel.org/all/20240910130019.35081-1-jonathanh@nvidia.com/
>
> Hi Saravana,
>
> the issue faced by Jon needs the exact same change but in a different place,
> drivers/phy/tegra/xusb.c, which I posted at:
> https://lore.kernel.org/all/f979aff2-34f4-4f6d-bb9a-03a02afc4635@notapiano/

Ah sorry, I was in a hurry and missed the fact it was a different file.

>
> So we need two separate patches, one for each issue. Feel free to add that to
> this series. (I could send it myself, but I think it makes more sense to keep
> them together)

Sent a new series. Thanks for the heads up and the fix for Jon's issue.

-Saravana