From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mout-p-101.mailbox.org (mout-p-101.mailbox.org [80.241.56.151]) (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 A87782EC0A7; Thu, 15 Jan 2026 19:20:21 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=80.241.56.151 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1768504824; cv=none; b=qjmBQjqzw7Sd8aBdg+Y5pc3IeR0g1lItYszUNXP1ZDxKiS1Y+3zpJ5F2IdXuD8P1vSMwmRzS4MMkwUGFdOBDehlJbwLhjLb5LREj3UBX2ldwlzHXOKQW8qX12fjFrtYxM8d5yr7R/yX8IXIntomMn1YGs+lsFdEgIqmGmhPRInM= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1768504824; c=relaxed/simple; bh=QAaLGju36I3kZzHjDPheeHO6a3jwEpfOoV1vCT8kT/g=; h=Message-ID:Date:MIME-Version:Subject:To:Cc:References:From: In-Reply-To:Content-Type; b=su+R2ym9y13ubyQrJ00pd/HgEdCUjDmduEkICC4qAZ6OiUVZz8M4wCFr6+aaB4tSBn/8qfVAtqXv+bBsC1shEryUXOAkLke2H9GB0n+KVlfEgSo0GS7gUmcVs5YntfwPuK9BkWvBaQ5Ur5Z4CyGtsiWvRKBlREYVyf7/wa5+1CA= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=mailbox.org; spf=pass smtp.mailfrom=mailbox.org; dkim=pass (2048-bit key) header.d=mailbox.org header.i=@mailbox.org header.b=ggALHCEd; arc=none smtp.client-ip=80.241.56.151 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=mailbox.org Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=mailbox.org Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=mailbox.org header.i=@mailbox.org header.b="ggALHCEd" Received: from smtp202.mailbox.org (smtp202.mailbox.org [IPv6:2001:67c:2050:b231:465::202]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256) (No client certificate requested) by mout-p-101.mailbox.org (Postfix) with ESMTPS id 4dsXr15RVQz9tDR; Thu, 15 Jan 2026 20:20:17 +0100 (CET) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=mailbox.org; s=mail20150812; t=1768504817; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=E4fJp9wbmRI1vmPAbrx5E9O/lqTVncJXTTCym1eiIps=; b=ggALHCEdtM7NcWEy/LIWICqAGbbnkDV3aCDwdbB+blQ58j9V1ZoauYI2fBb4Q21SxMKTfn eipkD+RBlBujcFWGe8yusmki5H31ndlFJUMRHwnUKstNuuv4Wza/A6nSL4Ux8Srtn9DXiC ptHSqFvKtMmkmJSu7DaNjK5HJCuUrqPQOg/Zf8hX4jVTZBpZ1LtOANWXRtcToRpP0nIJBM 59iz2fcIVXZpP5IcHStCiH/nkvKJPzOisZlFdN865VphWsiOQY5Yjr43PTiL5poH110cXb NvmJUdImwHXq4/IJqhe86h+olYyyxQ0y+zF3RrM1KswR9vWNmFR7Vp22FelXOA== Message-ID: <85ff0eb2-d942-4f85-8f1d-c5982bd31bec@mailbox.org> Date: Thu, 15 Jan 2026 20:20:03 +0100 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Subject: Re: [PATCH 1/2] dt-bindings: display: panel: Fork Waveshare panels into separate document To: Rob Herring Cc: linux-arm-kernel@lists.infradead.org, Conor Dooley , David Airlie , Geert Uytterhoeven , Jessica Zhang , Krzysztof Kozlowski , Maarten Lankhorst , Magnus Damm , Maxime Ripard , Neil Armstrong , Sam Ravnborg , Simona Vetter , Thierry Reding , Thomas Zimmermann , devicetree@vger.kernel.org, dri-devel@lists.freedesktop.org, linux-kernel@vger.kernel.org, linux-renesas-soc@vger.kernel.org References: <20260113000715.231238-1-marek.vasut+renesas@mailbox.org> <20260115174047.GA930768-robh@kernel.org> Content-Language: en-US From: Marek Vasut In-Reply-To: <20260115174047.GA930768-robh@kernel.org> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit X-MBO-RS-ID: 744ec2472507d528058 X-MBO-RS-META: qcfhjoyang9zs5kdamujjdinfhhwheqm On 1/15/26 6:40 PM, Rob Herring wrote: > On Tue, Jan 13, 2026 at 01:05:30AM +0100, Marek Vasut wrote: >> Move the Waveshare panels description into separate document, so they >> can be properly described with compatible = "waveshare,...", "panel-dpi" >> and attached to "waveshare,dsi2dpi" bridge. > > But why do we need "panel-dpi"? Adding that requires changing a DT. > Can't you make the kernel handle these compatible strings as a > "panel-dpi" without the compatible? I can, but wouldn't we then miss the more specific compatible strings in the DT ? compatible = "waveshare,13.3inch-panel", "panel-dpi"; ^^^^^^^^^^^^^^^^^^^^^^^^^^ this ... would be removed. Do we want that ? The other option would be to add the timings into panel-simple driver, then we wouldn't have to change the bindings at all. Maybe that would be preferable ?