linux-kernel - Re: [PATCH v2] drm/sun4i: dw-hdmi: Make HDMI PHY into a platform device

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Date:   Mon, 7 Jun 2021 10:13:15 -0700
From:   Saravana Kannan <saravanak@...gle.com>
To:     Maxime Ripard <maxime@...no.tech>
Cc:     Ondrej Jirman <megous@...ous.com>, Chen-Yu Tsai <wens@...e.org>,
        Jernej Skrabec <jernej.skrabec@...il.com>,
        David Airlie <airlied@...ux.ie>,
        Daniel Vetter <daniel@...ll.ch>,
        "open list:DRM DRIVER FOR ALLWINNER DE2 AND DE3 ENGINE" 
        <dri-devel@...ts.freedesktop.org>,
        "moderated list:ARM/Allwinner sunXi SoC support" 
        <linux-arm-kernel@...ts.infradead.org>,
        "open list:ARM/Allwinner sunXi SoC support" 
        <linux-sunxi@...ts.linux.dev>,
        open list <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v2] drm/sun4i: dw-hdmi: Make HDMI PHY into a platform device

On Mon, Jun 7, 2021 at 4:41 AM Maxime Ripard <maxime@...no.tech> wrote:
>
> On Mon, Jun 07, 2021 at 10:58:36AM +0200, Ondrej Jirman wrote:
> > From: Saravana Kannan <saravanak@...gle.com>
> >
> > On sunxi boards that use HDMI output, HDMI device probe keeps being
> > avoided indefinitely with these repeated messages in dmesg:
> >
> >   platform 1ee0000.hdmi: probe deferral - supplier 1ef0000.hdmi-phy
> >     not ready
> >
> > There's a fwnode_link being created with fw_devlink=on between hdmi
> > and hdmi-phy nodes, because both nodes have 'compatible' property set.
> >
> > Fw_devlink code assumes that nodes that have compatible property
> > set will also have a device associated with them by some driver
> > eventually. This is not the case with the current sun8i-hdmi
> > driver.
> >
> > This commit makes sun8i-hdmi-phy into a proper platform device
> > and fixes the display pipeline probe on sunxi boards that use HDMI.
> >
> > More context: https://lkml.org/lkml/2021/5/16/203
> >
> > Signed-off-by: Saravana Kannan <saravanak@...gle.com>
> > Signed-off-by: Ondrej Jirman <megous@...ous.com>
>
> Applied, thanks
> Maxime

Thanks everyone! And thanks for following up on this Ondrej!

-Saravana