From: "Luca Ceresoli" <luca.ceresoli@bootlin.com>
To: "Dario Binacchi" <dario.binacchi@amarulasolutions.com>,
<dri-devel@lists.freedesktop.org>
Cc: <michael@amarulasolutions.com>,
<linux-amarula@amarulasolutions.com>,
"Andrzej Hajda" <andrzej.hajda@intel.com>,
"David Airlie" <airlied@gmail.com>,
"Jernej Skrabec" <jernej.skrabec@gmail.com>,
"Jonas Karlman" <jonas@kwiboo.se>,
"Laurent Pinchart" <Laurent.pinchart@ideasonboard.com>,
"Laurentiu Palcu" <laurentiu.palcu@oss.nxp.com>,
"Luca Ceresoli" <luca.ceresoli@bootlin.com>,
"Maarten Lankhorst" <maarten.lankhorst@linux.intel.com>,
"Maxime Ripard" <mripard@kernel.org>,
"Neil Armstrong" <neil.armstrong@linaro.org>,
"Robert Foss" <rfoss@kernel.org>,
"Simona Vetter" <simona@ffwll.ch>,
"Thomas Zimmermann" <tzimmermann@suse.de>,
<linux-kernel@vger.kernel.org>
Subject: Re: [PATCH] drm/bridge: fsl-ldb: return -EPROBE_DEFER if the panel bridge is not found
Date: Thu, 29 Oct 2026 20:30:31 +0100 [thread overview]
Message-ID: <DMHKL3TFB3D6.10S4BKS9F6TXJ@bootlin.com> (raw)
In-Reply-To: <20261029144132.572020-1-dario.binacchi@amarulasolutions.com>
On Thu Oct 29, 2026 at 3:41 PM CET, Dario Binacchi wrote:
> of_drm_find_and_get_bridge() returns NULL if the panel has not been
> registered yet. Returning -ENODEV in this case makes the probe fail
> instead of being retried, so the LDB is never bound and the display
> pipeline never comes up:
>
> platform 32e90000.display-controller: deferred probe pending: imx-lcdif: Failed to get bridge for endpoint0
>
> Return -EPROBE_DEFER, so that the probe is retried once the panel is
> available.
>
> Fixes: 802372cf316a ("drm/bridge: fsl-ldb: don't create a panel_bridge")
> Signed-off-by: Dario Binacchi <dario.binacchi@amarulasolutions.com>
Reviewed-by: Luca Ceresoli <luca.ceresoli@bootlin.com>
--
Luca Ceresoli, Bootlin
Embedded Linux and Kernel engineering
https://bootlin.com
prev parent reply other threads:[~2026-10-29 19:30 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-10-29 14:41 Dario Binacchi
2026-10-29 15:01 ` Laurentiu Palcu
2026-10-29 19:30 ` Luca Ceresoli [this message]
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