From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 94D0DC44529 for ; Tue, 21 Jul 2026 10:47:23 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:Content-Type: Content-Transfer-Encoding:List-Subscribe:List-Help:List-Post:List-Archive: List-Unsubscribe:List-Id:In-Reply-To:From:References:Cc:To:Subject: MIME-Version:Date:Message-ID:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=4UynJy/xoBY3MHoD5J/6hqQU8WrdjT+4H7fZIzzalMc=; b=hZJE5iQeZI9bIq cU/dw59nR1HM3Dfyw8oSaBHyV8PMPkJTxeX8QSl90WzodcIBV7SIb1wReRsID2aexQFFXuFO6WzNg mUZqOkDhdlK3dgRyJ67zjvcvEI2NKU1/pZXTeoTfx4aP1MRbuT06unDtqUqUMWgKy6p0OBApgOEjj 0QPKTApaCxrlTKKUNa5hyrQcdC61mecLYqXJzXLPvIBKH5AIWF0uPP8CIEotdErHpRuyJOVHFXtgX UTOIsRoGWwUg1qnz8nPLdXXfNRmMU4X6LkOZDl77lG9L+VHBLa6745XrbxumknWztpsEEgb/TgcmE wa8aIxt0XDVNxsaghW4A==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.99.1 #2 (Red Hat Linux)) id 1wm80R-00000009FBl-0jMV; Tue, 21 Jul 2026 10:47:23 +0000 Received: from tor.source.kernel.org ([172.105.4.254]) by bombadil.infradead.org with esmtps (Exim 4.99.1 #2 (Red Hat Linux)) id 1wm80P-00000009FBe-3ySI for linux-phy@lists.infradead.org; Tue, 21 Jul 2026 10:47:22 +0000 Received: from smtp.kernel.org (quasi.space.kernel.org [100.103.45.18]) by tor.source.kernel.org (Postfix) with ESMTP id 5C8766004E; Tue, 21 Jul 2026 10:47:21 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 9BB821F00ADB; Tue, 21 Jul 2026 10:47:18 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1784630841; bh=qiRn/EoXowNAFUb+/CMEqlELTbv2z1ktp+4yNterQHM=; h=Date:Subject:To:Cc:References:From:In-Reply-To; b=D9hKYERxh9kQflnAdZPElpi7jsICi86hlzf3cfplZI4XcE1rILPch2S3QV4TSZS1+ 1Ndu5FI4yNrgfwjJdWPpnJcIjA9ZFl/IBVLk4BmYgkQi4oXyAzryvFGDPAyJmSzc+i T4st8JebReZDHffEST00qO2m2XD0zAmc4okz/sJZmAuKT5RNcbfWPg5ZrRqBRYEDEM ycEHsQwe9cCxpmxsqij2RgtSuihaH2TNwhT13tPOnlfss4WkosYLhwpJfY8SXxA0Et xgsTNdqmY1EFfYfZyfMjmVssD7Ee7lwFGz2rspepdog9wNqK1mTuXusFB5GB7914Bx k0MOyyevsAIpg== Message-ID: Date: Tue, 21 Jul 2026 11:47:15 +0100 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v13 1/2] dt-bindings: phy: qcom: Add CSI2 C-PHY/DPHY schema To: Vladimir Zapolskiy , Bryan O'Donoghue , Vinod Koul , Kishon Vijay Abraham I , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Neil Armstrong Cc: linux-arm-msm@vger.kernel.org, linux-phy@lists.infradead.org, linux-media@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, Krzysztof Kozlowski References: <20260720-x1e-csi2-phy-v13-0-160c31958863@linaro.org> <20260720-x1e-csi2-phy-v13-1-160c31958863@linaro.org> <0da6d314-bfa9-493a-bcc6-8c3b75751d0c@linaro.org> <88ae6662-cb85-4e3a-bbb5-1b536348df34@kernel.org> <_t1jiMTX3iIXhUkTDz0Cbh_uZhdUK_Y8vlIwxt1VNRbuKuRnpVCWabal-b4AuFrVaKrDnQSFOWtDn6-VCbS3DA==@protonmail.internalid> <345ca98e-09f6-4965-87bb-e64dac096498@linaro.org> From: Bryan O'Donoghue Content-Language: en-GB Autocrypt: addr=bod@kernel.org; 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charset="us-ascii"; Format="flowed" Sender: "linux-phy" Errors-To: linux-phy-bounces+linux-phy=archiver.kernel.org@lists.infradead.org On 21/07/2026 10:56, Vladimir Zapolskiy wrote: > On 7/21/26 12:39, Bryan O'Donoghue wrote: >> On 21/07/2026 09:17, Vladimir Zapolskiy wrote: >>>> + "#phy-cells": >>>> + const: 1 >>>> + description: >>>> + The single cell specifies the PHY operating mode. >>> This has been reported before, #phy-cells shall be 0, the operation >>> mode is selected by bus-type of endpoints as it is described in >>> video-interfaces.yaml >>> >>> Two competing values are redundant and it opens a door to a wrong >>> hardware description, the technical discussion has not been started yet. >> So as I said before, I'm following Rob Herring's input on this and >> Krzysztof has given RB for this binding. At this stage, I don't see >> scope to change it. >> >> Adding endpoints was already a compromise to address your feedback, >> which I hoped would bring you on board with the design. > That's my comment dated March 27, 2026, and it says moving phy type > from phy cell to the endpoint property excludes the need to set any > phy cells: > > https://lore.kernel.org/linux-arm-msm/e37ce438-12c7-462d- > b2bc-1351be62b806@linaro.org/ > > The technical comment is left unresponded so far since then. > > Since there is no expected phy cells to get on consumer's side, and > since there is another link between CSIPHY and CSID described in > video-interfaces.yaml, any kind of dependency of this IP on phy can > be just removed, which serves the purpose of hardware description > simplification. Rob's v1 feedback was consumer-decides-mode via the cell; Krzysztof has R-b'd the binding with cells=1. I'm happy to lock down this binding as-is on that basis. Are you arguing about phy-cells or are you actually arguing the entire instantiation of Qualcomm MIPI CSI2 as a standalone generic driver in drivers/phy ? Its not the same debate at all. As the CAMSS maintainer, I'm fully against adding more inline monolithic CSIPHY init sequences. That could be represented as a separate linux-media driver but, then that implies that _all_ upstream CSIPHY drivers in drivers/phy are wrong, and I just don't accept that. The bindings have DT maintainer RB, and the driver has Qcom engineer tested-by, review-by. Vinod, Kishon - Again, I'd request this merges as-is. --- bod -- linux-phy mailing list linux-phy@lists.infradead.org https://lists.infradead.org/mailman/listinfo/linux-phy