From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 0B1711A08AF; Tue, 7 Apr 2026 19:30:14 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1775590215; cv=none; b=vC8dizQGl35/3E08JY6HP4+KycP3IklhNodPgDTbJsePh/UXGj278pxt7WiQyUYAhcT9FQNYcWchyOHSzHngi+cy/meV9TTvx/FCgjQk14LlulpQqp/l55UGMz3UFGOhdBnbkFQ6nkSe9nr0j2jJFQGKx8paTtPOX9HFfiFagw0= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1775590215; c=relaxed/simple; bh=RJp2WhnzkhKGVYaMRGQ9Rf31nG4dmH/ZN8pD+88bwCE=; h=Message-ID:Date:MIME-Version:Subject:To:Cc:References:From: In-Reply-To:Content-Type; b=IJqk7ydTIilHEltLeJFs+9QQX6yyfSUaIjuIViyVsxbF9qI2VaBSPC6CE6vmqZZ/G8GLRJ8AKw588fASraTpk4nHSZ1oti0Quq0LFUddLY0SwEvql9kFw9ZT4H91D3nhxZkstsH64zU+yRP1vngiuB+hXPn5E/20DLPmgxM02LE= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=aUg+SEvH; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="aUg+SEvH" Received: by smtp.kernel.org (Postfix) with ESMTPSA id EA444C116C6; Tue, 7 Apr 2026 19:30:10 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1775590214; bh=RJp2WhnzkhKGVYaMRGQ9Rf31nG4dmH/ZN8pD+88bwCE=; h=Date:Subject:To:Cc:References:From:In-Reply-To:From; b=aUg+SEvHW+bMleXQnXSt2JC4f2vciEHKwFF6fmVWa2VJhMbMn3BtuSgdhjYJoEbqK uFKJ0WVtd/9i4Jncj1IvZmi4y/NvTfrM84FlhFv+FNXQY/Jw3gbyTJufelODKVRseW I3FqRo2P7HMsbsUw51AwEYGxn1tzn/UeeUBWVilM+8Cn3Br2mjqEt6PXyiE/r9RNea bNnPJNkhWsqIBv2xRYlrCIN7PcyBOUzvWeIUe7Nxbn02ifFRDNpGRW+02JzuhgEFsC bbBugRjOJJ4S9hMReDBNFxGq6HsFN4eMLq3hRQSV6/SzaIRq0f0KOpnrqKyZtGobP4 ZJMO+Xp6eN31A== Message-ID: <22f25d09-136b-4e53-8b64-2e03f6d18b76@kernel.org> Date: Tue, 7 Apr 2026 21:30:09 +0200 Precedence: bulk X-Mailing-List: devicetree@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH] dt-bindings: display: bridge: lt9211: Require data-lanes on DSI input ports To: Marek Vasut Cc: devicetree@vger.kernel.org, Andrzej Hajda , Conor Dooley , David Airlie , Jernej Skrabec , Jonas Karlman , Krzysztof Kozlowski , Laurent Pinchart , Maarten Lankhorst , Maxime Ripard , Neil Armstrong , Rob Herring , Robert Foss , Simona Vetter , Thomas Zimmermann , dri-devel@lists.freedesktop.org, linux-kernel@vger.kernel.org References: <20260404034123.340818-1-marex@nabladev.com> <20260407-invaluable-pretty-leopard-1e8dfc@quoll> From: Krzysztof Kozlowski Content-Language: en-US Autocrypt: addr=krzk@kernel.org; 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charset=UTF-8 Content-Transfer-Encoding: 7bit On 07/04/2026 16:51, Marek Vasut wrote: > On 4/7/26 10:00 AM, Krzysztof Kozlowski wrote: > >>> NOTE: For example Linux kernel driver does already use that information >>> and fails to probe if it is missing. There are currently no intree >> >> The first sentence must be part of the commit msg. That is important >> reason why you are doing this... but I don't see how you achieve any of >> this. Look: >> >> >>> users for this binding, so no new warnings will be generated once >>> this is applied, but a new user is about to be added. >> >> What warnings? How? > > There are no in-tree users of this binding, so no DT checker warnings > will be produced on existing in-tree DTs. I am in the process of adding > a DTO which uses this binding now in arm64: dts: imx8mm: imx8mp: Add > DTOs for Data Modul i.MX8M Mini and Plus eDM SBC So add new user, apply this and what warnings are you seeing? > >>> --- >>> .../display/bridge/lontium,lt9211.yaml | 37 ++++++++++++++++++- >>> 1 file changed, 35 insertions(+), 2 deletions(-) >>> >>> diff --git a/Documentation/devicetree/bindings/display/bridge/lontium,lt9211.yaml b/Documentation/devicetree/bindings/display/bridge/lontium,lt9211.yaml >>> index 9a6e9b25d14a9..5264fb2b68b78 100644 >>> --- a/Documentation/devicetree/bindings/display/bridge/lontium,lt9211.yaml >>> +++ b/Documentation/devicetree/bindings/display/bridge/lontium,lt9211.yaml >>> @@ -36,18 +36,50 @@ properties: >>> >>> properties: >>> port@0: >>> - $ref: /schemas/graph.yaml#/properties/port >>> + $ref: /schemas/graph.yaml#/$defs/port-base >> >> OK, that's correct. >> >>> + unevaluatedProperties: false >>> description: >>> Primary MIPI DSI port-1 for MIPI input or >>> LVDS port-1 for LVDS input or DPI input. >>> >>> + properties: >>> + endpoint: >>> + $ref: /schemas/media/video-interfaces.yaml# >>> + unevaluatedProperties: false >> >> That's correct. >> >>> + >>> + properties: >>> + data-lanes: >>> + description: array of physical DSI data lane indexes. >>> + minItems: 1 >>> + items: >>> + - const: 1 >>> + - const: 2 >>> + - const: 3 >>> + - const: 4 >> >> That's almost redundant in this context - it was already there - and the >> point is that it solves noting in the problem you had. Binding still >> does not validate the ABI and does not match it, still. >> >> Since commit foo bar, driver needs data-lanes, so what you need to do is >> allow them and to require them. You can also specify their constraints >> if device can be configured multiple ways, up to 4 lanes. > Please pardon my ignorance, what exactly do you propose I change in this > patch ? Follow the subject - require data-lanes. That's was the main point of this change, no? Best regards, Krzysztof