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Date:   Fri, 29 Oct 2021 10:05:21 +0200
From:   Maxime Ripard <maxime@cerno.tech>
To:     Marek Szyprowski <m.szyprowski@samsung.com>
Cc:     Thierry Reding <thierry.reding@gmail.com>,
        Laurent Pinchart <Laurent.pinchart@ideasonboard.com>,
        Andrzej Hajda <a.hajda@samsung.com>,
        Robert Foss <robert.foss@linaro.org>,
        Jonas Karlman <jonas@kwiboo.se>,
        Daniel Vetter <daniel.vetter@intel.com>,
        David Airlie <airlied@linux.ie>,
        Maarten Lankhorst <maarten.lankhorst@linux.intel.com>,
        Thomas Zimmermann <tzimmermann@suse.de>,
        Jernej Skrabec <jernej.skrabec@gmail.com>,
        Sam Ravnborg <sam@ravnborg.org>,
        Neil Armstrong <narmstrong@baylibre.com>,
        Seung-Woo Kim <sw0312.kim@samsung.com>,
        linux-arm-msm@vger.kernel.org,
        Joonyoung Shim <jy0922.shim@samsung.com>,
        Rob Clark <robdclark@gmail.com>,
        Tian Tao <tiantao6@hisilicon.com>,
        Chen Feng <puck.chen@hisilicon.com>,
        Xinwei Kong <kong.kongxinwei@hisilicon.com>,
        Kyungmin Park <kyungmin.park@samsung.com>,
        linux-samsung-soc@vger.kernel.org,
        Xinliang Liu <xinliang.liu@linaro.org>,
        John Stultz <john.stultz@linaro.org>,
        linux-kernel@vger.kernel.org, Inki Dae <inki.dae@samsung.com>,
        dri-devel@lists.freedesktop.org, freedreno@lists.freedesktop.org,
        Sean Paul <sean@poorly.run>
Subject: Re: [v6,02/21] drm/bridge: adv7511: Register and attach our DSI
 device at probe
Message-ID: <20211029080521.6tmfq4kjngu5slv7@gilmour>
References: <20211025151536.1048186-3-maxime@cerno.tech>
 <CGME20211029062347eucas1p1431402205321b066349e3ccf432d2452@eucas1p1.samsung.com>
 <73c13cf5-ca36-f47b-f53a-11d4f015505c@samsung.com>
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Hi Marek,

On Fri, Oct 29, 2021 at 08:23:45AM +0200, Marek Szyprowski wrote:
> Hi,
>=20
> On 25.10.2021 17:15, Maxime Ripard wrote:
> > In order to avoid any probe ordering issue, the best practice is to move
> > the secondary MIPI-DSI device registration and attachment to the
> > MIPI-DSI host at probe time. Let's do this.
> >
> > Acked-by: Sam Ravnborg <sam@ravnborg.org>
> > Tested-by: John Stultz <john.stultz@linaro.org>
> > Signed-off-by: Maxime Ripard <maxime@cerno.tech>
>
> This patch landed in linux-next as commit 864c49a31d6b ("drm/bridge:
> adv7511: Register and attach our DSI device at probe"). Sadly it causes
> endless probe-fail-defer loop on DragonBoard 410c board
> (arch/arm64/boot/dts/qcom/apq8016-sbc.dts):

I'm sorry to hear that (but would have been surprised if it didn't occur)

This is supposed to be fixed by 8f59ee9a570c ("drm/msm/dsi: Adjust probe
order"). Do you have that patch applied?

Maxime

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