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 gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (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 C009FCDB46F for ; Mon, 22 Jun 2026 09:38:24 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id F27DE10E5B9; Mon, 22 Jun 2026 09:38:23 +0000 (UTC) Authentication-Results: gabe.freedesktop.org; dkim=pass (2048-bit key; unprotected) header.d=kernel.org header.i=@kernel.org header.b="UivVNvOI"; dkim-atps=neutral Received: from tor.source.kernel.org (tor.source.kernel.org [172.105.4.254]) by gabe.freedesktop.org (Postfix) with ESMTPS id 06EBD10E5B9 for ; Mon, 22 Jun 2026 09:38:23 +0000 (UTC) Received: from smtp.kernel.org (quasi.space.kernel.org [100.103.45.18]) by tor.source.kernel.org (Postfix) with ESMTP id 2248460051; Mon, 22 Jun 2026 09:38:22 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 5DE1E1F000E9; Mon, 22 Jun 2026 09:38:21 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1782121101; bh=Id1aDwPwK65QrmbSsCVlm+KO6gNxO+F+f3OzjJRBAxo=; h=Date:From:To:Cc:Subject:References:In-Reply-To; b=UivVNvOI86fO3Vaefe/GUWz88xuXnRdNYaaWQLdEsoNSFypwCKYXuNJVcagOuDOx9 TSV6S3lGifHWeD0qo9ZmWqPwQSmjcQxg7qqd6NLdWFjY5b/0WY0XbkCuwC0UyKKp/q KoAIaHbIR66kyUVpbt6nEcZaGjpUrfjALA2lB8pbW/QfSh8RnXlqXJsasmbB238gso Zs5bMkElZKP8UrdYZzKIhFDXxBrks5EiLX81hgtSFpbHRrXe6Pr5LVmh5rxc1X3StG pWiXgpm+/xRigUqHnic1l3JxDJMkUQUs4oTL3SkBZBOA4hrL6tP3ad1EF1kZAvKu4Z TwF8kY1u/Ac6g== Date: Mon, 22 Jun 2026 11:38:19 +0200 From: Maxime Ripard To: Liu Ying Cc: Luca Ceresoli , Andrzej Hajda , Neil Armstrong , Robert Foss , Laurent Pinchart , Jonas Karlman , Jernej Skrabec , Maarten Lankhorst , Thomas Zimmermann , David Airlie , Simona Vetter , Frank Li , Sascha Hauer , Pengutronix Kernel Team , Fabio Estevam , Dmitry Baryshkov , dri-devel@lists.freedesktop.org, imx@lists.linux.dev, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org Subject: Re: [PATCH v3] drm/bridge: imx93-mipi-dsi: Fix mode validation Message-ID: <20260622-strong-messy-hare-2372cd@houat> References: <20260515-imx93-mipi-dsi-fix-mode-validation-v3-1-91f7d22b2fe4@nxp.com> MIME-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha384; protocol="application/pgp-signature"; boundary="4lki2wyprf2do7cs" Content-Disposition: inline In-Reply-To: X-BeenThere: dri-devel@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Direct Rendering Infrastructure - Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" --4lki2wyprf2do7cs Content-Type: text/plain; protected-headers=v1; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable Subject: Re: [PATCH v3] drm/bridge: imx93-mipi-dsi: Fix mode validation MIME-Version: 1.0 On Mon, Jun 22, 2026 at 03:52:26PM +0800, Liu Ying wrote: > > Finally, out of my utter ignorance on the subject, is the VESA +/-0.5% > > margin generic enough that this driver can always rely on it? >=20 > I see several upstream drivers rely on it, see "git grep '0.5%' drivers/g= pu/" > output. And every display mode allows -/+ 0.5% pixel clock rate deviation > according to VESA Display Monitor Timing Standard [1], though [1] is a fo= und > by a random Google search. Yes, it's what we've been using for some time now. Is there any particular concern about it? Maxime --4lki2wyprf2do7cs Content-Type: application/pgp-signature; name="signature.asc" -----BEGIN PGP SIGNATURE----- iJUEABMJAB0WIQTkHFbLp4ejekA/qfgnX84Zoj2+dgUCajkCiwAKCRAnX84Zoj2+ dn2NAYCjusnaBSXQclXmwY3AEMzqqxTj1CmUJL+6wWsRE+k9k0v5r5ASO8HI/G/s MkWnjsQBf0BXjCandzhPC/6y7PGfq8bZ3ikevTtkM3UEjBFpirFQ9TqRTn+EDC0T FJqJLbn8zg== =h4Vk -----END PGP SIGNATURE----- --4lki2wyprf2do7cs--