From mboxrd@z Thu Jan 1 00:00:00 1970 Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.remote-ip=185.246.85.4 ARC-Seal: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; cv=none; t=1793302253; b=yYQiBe2Q39hhGvtUEKubvoLRNnXVII53KpClT0ODhirorg34j5LXdtu8+0/++Jw/IVHI Ob5fZpWdz/dG1jh0S8TpKphpOuXkHUBThcgGx95SvwzFOKCQMCUhQ9qV6S9dbgmWIklZh xmOt/B2ksEIlDpMvLHUJfCaxgA/fXjvNZi2cNhPaki5Pp43s84Icou6EWnPqyXnTL35+Z +0iUwgwfQDoquJYA4NCUhDHHqD43673lBI60gqSeL9jFKlxjnaQ3gcy9v8wAxrnr1+ovX WO+qVFfSLImczDexLQuiQwqbuD9MG3m0yhGv1yN1Lec0hdv923BpeOUEFWXll/DWmLA== ARC-Message-Signature: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; c=relaxed/relaxed; t=1793302253; h=DMARC-Filter:Received:Received:Received:DKIM-Signature:Mime-Version: Content-Transfer-Encoding:Content-Type:Date:Message-Id:Subject:Cc:To: From:X-Mailer:References:In-Reply-To:X-Last-TLS-Session-Version; bh=5Ll62Av3zqAK/UwbMKhO8aHQhK9NIEhSdwE8ZCKZZSM=; b=E24huirNetksW5NjxrbAsD1GnbHmnXumSy3fO2Qs812lAF37VCY5DhzRcdQMr5+BX66V 9lj9nHdcuagwaQgwOVpTuOf6uSGQQRe12n9AnTFNFKGXfzpH7OjTNtn7JpKPhtDeqoDut DimXJhFyi/cbp6jhdeIzCGq2ZjUWOQBW4TUlp3CbVcboOdYTyt+kCEqEAJRLqolLpGeyD P5NTqbS9WhRhcYcYPzPxGe7aHErXr2eYlU6eOEbSyek4djnKLjfY/vuFOoz0EjjibRPsm 3tfq55YAp43zFvs00yvYcPMCYoyHSSqpnpuaSd+fLoeQs77+8FH1A7LthVtidubSpKA== ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass header.from=bootlin.com; spf=pass smtp.mailfrom=bootlin.com; dkim=pass header.d=bootlin.com header.i=@bootlin.com header.a=rsa-sha256 header.s=dkim header.b=BcxkCqPP; arc=none smtp.remote-ip=185.246.85.4 Received: from smtpout-03.galae.net (smtpout-03.galae.net [185.246.85.4]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature ECDSA (prime256v1) server-digest SHA256) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 8220B606A31A for ; Thu, 29 Oct 2026 19:30:50 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.4.2 smtp.subspace.kernel.org 8220B606A31A Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=bootlin.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=bootlin.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key, unprotected) header.d=bootlin.com header.i=@bootlin.com header.a=rsa-sha256 header.s=dkim header.b=BcxkCqPP Received: from smtpout-01.galae.net (smtpout-01.galae.net [212.83.139.233]) by smtpout-03.galae.net (Postfix) with ESMTPS id 168B94E41399; Thu, 29 Oct 2026 19:30:43 +0000 (UTC) Received: from mail.galae.net (mail.galae.net [212.83.136.155]) by smtpout-01.galae.net (Postfix) with ESMTPS id CEAF76076A; Thu, 29 Oct 2026 19:30:42 +0000 (UTC) Received: from [127.0.0.1] (localhost [127.0.0.1]) by localhost (Mailerdaemon) with ESMTPSA id 12A6B10328F94; Thu, 29 Oct 2026 20:30:31 +0100 (CET) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=bootlin.com; s=dkim; t=1793302237; h=from:subject:date:message-id:to:cc:mime-version:content-type: content-transfer-encoding:in-reply-to:references; bh=5Ll62Av3zqAK/UwbMKhO8aHQhK9NIEhSdwE8ZCKZZSM=; b=BcxkCqPPeOZNlzvUkt34zUi+bPlBrwF5/ELWAjACOSKLOEqu5ZG8BwQ5THjmZir8WXDnia KtakL2n+IAEfH610ac1VwmOjNYM4/+sPGZWQ7qkz66dfKFBgX0E80PznTP4W4oPiXQUGDm B2Yl9wZfaBDBuNoxNu/dI9EH6NggUwaAV7hpmhtV+QZctGjVyNGTrrSBz7620nTwNJCe5R v4KGhscGj1vAlNEpblwwc1W4D6Pq6gF2eR8o81b0LMUw2QMDA9YrPEhRTqWN14Bse7rY4V 3pkdHWZ4JSXnCP7dClBjXtpe7bwC+8A4vmkHbtpUc1ptRinSDxllx0HqogqSUg== X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Post: List-Help: List-Subscribe: List-Unsubscribe: List-Owner: Precedence: list Mime-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset=UTF-8 Date: Thu, 29 Oct 2026 20:30:31 +0100 Message-Id: Subject: Re: [PATCH] drm/bridge: fsl-ldb: return -EPROBE_DEFER if the panel bridge is not found Cc: , , "Andrzej Hajda" , "David Airlie" , "Jernej Skrabec" , "Jonas Karlman" , "Laurent Pinchart" , "Laurentiu Palcu" , "Luca Ceresoli" , "Maarten Lankhorst" , "Maxime Ripard" , "Neil Armstrong" , "Robert Foss" , "Simona Vetter" , "Thomas Zimmermann" , To: "Dario Binacchi" , From: "Luca Ceresoli" X-Mailer: aerc 0.22.0 References: <20261029144132.572020-1-dario.binacchi@amarulasolutions.com> In-Reply-To: <20261029144132.572020-1-dario.binacchi@amarulasolutions.com> X-Last-TLS-Session-Version: TLSv1.3 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 Reviewed-by: Luca Ceresoli -- Luca Ceresoli, Bootlin Embedded Linux and Kernel engineering https://bootlin.com