linux-kernel - Re: [PATCH AUTOSEL 5.4 07/15] drm/sun4i: dw-hdmi: Make HDMI PHY into a platform device

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Date:   Sun, 20 Jun 2021 08:56:51 -0400
From:   Sasha Levin <sashal@...nel.org>
To:     Saravana Kannan <saravanak@...gle.com>
Cc:     LKML <linux-kernel@...r.kernel.org>,
        stable <stable@...r.kernel.org>,
        Ondrej Jirman <megous@...ous.com>,
        Andre Przywara <andre.przywara@....com>,
        Maxime Ripard <maxime@...no.tech>,
        dri-devel <dri-devel@...ts.freedesktop.org>,
        linux-arm-kernel <linux-arm-kernel@...ts.infradead.org>,
        "open list:ARM/Allwinner sunXi SoC support" 
        <linux-sunxi@...ts.linux.dev>
Subject: Re: [PATCH AUTOSEL 5.4 07/15] drm/sun4i: dw-hdmi: Make HDMI PHY into
 a platform device

On Tue, Jun 15, 2021 at 09:26:16AM -0700, Saravana Kannan wrote:
>On Tue, Jun 15, 2021 at 8:50 AM Sasha Levin <sashal@...nel.org> wrote:
>>
>> From: Saravana Kannan <saravanak@...gle.com>
>>
>> [ Upstream commit 9bf3797796f570b34438235a6a537df85832bdad ]
>>
>> 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.
>>
>
>fw_devlink isn't present in 5.4 or earlier. So technically this patch
>isn't needed.

I'll drop it from <=5.4, thanks!

-- 
Thanks,
Sasha