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 X-Spam-Level: X-Spam-Status: No, score=-6.4 required=3.0 tests=BAYES_00,DATE_IN_PAST_96_XX, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS, URIBL_BLOCKED autolearn=no autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 6C4BBC4363A for ; Mon, 5 Oct 2020 15:13:41 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 0D9922085B for ; Mon, 5 Oct 2020 15:13:41 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726398AbgJEPNk (ORCPT ); Mon, 5 Oct 2020 11:13:40 -0400 Received: from new1-smtp.messagingengine.com ([66.111.4.221]:50003 "EHLO new1-smtp.messagingengine.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726248AbgJEPNk (ORCPT ); Mon, 5 Oct 2020 11:13:40 -0400 Received: from compute6.internal (compute6.nyi.internal [10.202.2.46]) by mailnew.nyi.internal (Postfix) with ESMTP id 2AD2E580350; Mon, 5 Oct 2020 11:13:39 -0400 (EDT) Received: from mailfrontend1 ([10.202.2.162]) by compute6.internal (MEProxy); Mon, 05 Oct 2020 11:13:39 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=cerno.tech; h= date:to:cc:subject:message-id:from:references:mime-version :content-type:in-reply-to; s=fm1; bh=FtG2Bzuy5PqxUd7fnFYHl5Znz5H mAs+KH2eBPZ//Wzo=; b=NVCuzXlnXtSq15LRXTCVx5qRPNGYjQTymOsYZNvdS6x Aa11UQdQXmoAa2K2cZXjUrPEyEe1JeO3WsKuQUmsDR33Jr1TGS9q7Vo7r6aQF2FI mDqQgIYhbBwapj0Wl++gAT6grbt7bc6JTQknfOnBJEmUmNRwDORF2QYoUTnOeMYl Kk0OBUfmJ2ngAUKZZNEGX6CiZc+uzkchZnx2/pwZ0ZkXKS8e35QQGRNnS5kBzPcU izgIa5Zf8brXKVwY8yxE2itdO4mQV7Ice4xyDSp+iMd0qeJNReoCJ+RkQNp2f4nY k5cEGtoTU/DIrIqG+cSCBsZnUwLdeKLP+74zlsUm0mQ== DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d= messagingengine.com; h=cc:content-type:date:from:in-reply-to :message-id:mime-version:references:subject:to:x-me-proxy :x-me-proxy:x-me-sender:x-me-sender:x-sasl-enc; s=fm1; bh=FtG2Bz uy5PqxUd7fnFYHl5Znz5HmAs+KH2eBPZ//Wzo=; b=chBh/6Sydgee2d8NJ1zO+H IY5XR5iEAcOwKKrQ8aMnQY0bt0hYsvY1u0IY56M9NnBEISFkwAS9dT0ZsXxDTHT4 0wCxVNpGDprCu1G9Cve4NIPEm2LnfJEGxhAVhoRVcsMaV2I1AuY5d/zl3ksI/s9O lGcjxi11CwsyXHFJSn9c7U2ZDAygcHFpnjMIhCAyig4fPVDlIyV7HG0C96WUgvuS 0idtewaBFmsqyuWZuYHud9ulzqeuNC9bfVGG7sO5W0sF5SNFY0qWsMOkL136V1Z5 X1zgnBlk/nMORuRpmdglmNbBmTGHrTetjH8n/tB/fyQ+7jeqac7OZF3TdNrcjuTw == X-ME-Sender: X-ME-Proxy-Cause: gggruggvucftvghtrhhoucdtuddrgedujedrgedvgdekjecutefuodetggdotefrodftvf curfhrohhfihhlvgemucfhrghsthforghilhdpqfgfvfdpuffrtefokffrpgfnqfghnecu uegrihhlohhuthemuceftddtnecusecvtfgvtghiphhivghnthhsucdlqddutddtmdenuc fjughrpeffvffukffhfhggtggujgesghdtreertddtvdenucfhrhhomhepofgrgihimhgv ucftihhprghrugcuoehmrgigihhmvgestggvrhhnohdrthgvtghhqeenucggtffrrghtth gvrhhnpeeikefffefhffeiffehfeeghfevfeekfeejveetfeegjeejvefghfffheeifeeh ffenucfkphepledtrdekledrieekrdejieenucevlhhushhtvghrufhiiigvpedtnecurf grrhgrmhepmhgrihhlfhhrohhmpehmrgigihhmvgestggvrhhnohdrthgvtghh X-ME-Proxy: Received: from localhost (lfbn-tou-1-1502-76.w90-89.abo.wanadoo.fr [90.89.68.76]) by mail.messagingengine.com (Postfix) with ESMTPA id B94E43280059; Mon, 5 Oct 2020 11:13:36 -0400 (EDT) Date: Wed, 30 Sep 2020 15:04:59 +0200 To: Rob Herring Cc: Mark Rutland , Frank Rowand , Daniel Vetter , David Airlie , Maarten Lankhorst , Thomas Zimmermann , Eric Anholt , devicetree@vger.kernel.org, dri-devel@lists.freedesktop.org, linux-rpi-kernel@lists.infradead.org, bcm-kernel-feedback-list@broadcom.com, linux-arm-kernel@lists.infradead.org, Dave Stevenson , Tim Gover , Phil Elwell Subject: Re: [PATCH 1/2] drm/vc4: hdmi: Disable Wifi Frequencies Message-ID: <20200930130459.kfurbu34lc7jeuok@gilmour.lan> From: Maxime Ripard References: <20200925130744.575725-1-maxime@cerno.tech> <20200929190055.GA962101@bogus> MIME-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha256; protocol="application/pgp-signature"; boundary="u4bs7qtkzx5ibc3n" Content-Disposition: inline In-Reply-To: <20200929190055.GA962101@bogus> Precedence: bulk List-ID: X-Mailing-List: devicetree@vger.kernel.org --u4bs7qtkzx5ibc3n Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable Hi Rob, On Tue, Sep 29, 2020 at 02:00:55PM -0500, Rob Herring wrote: > On Fri, Sep 25, 2020 at 03:07:43PM +0200, Maxime Ripard wrote: > > There's cross-talk on the RPi4 between the 2.4GHz channels used by the = WiFi > > chip and some resolutions, most notably 1440p at 60Hz. > >=20 > > In such a case, we can either reject entirely the mode, or lower slight= ly > > the pixel frequency to remove the overlap. Let's go for the latter. > >=20 > > Signed-off-by: Maxime Ripard > > --- > > .../bindings/display/brcm,bcm2711-hdmi.yaml | 6 ++++++ > > drivers/gpu/drm/vc4/vc4_hdmi.c | 14 +++++++++++++- > > drivers/gpu/drm/vc4/vc4_hdmi.h | 8 ++++++++ > > 3 files changed, 27 insertions(+), 1 deletion(-) > >=20 > > diff --git a/Documentation/devicetree/bindings/display/brcm,bcm2711-hdm= i.yaml b/Documentation/devicetree/bindings/display/brcm,bcm2711-hdmi.yaml > > index 03a76729d26c..63e7fe999c0a 100644 > > --- a/Documentation/devicetree/bindings/display/brcm,bcm2711-hdmi.yaml > > +++ b/Documentation/devicetree/bindings/display/brcm,bcm2711-hdmi.yaml > > @@ -76,6 +76,12 @@ properties: > > resets: > > maxItems: 1 > > =20 > > + raspberrypi,disable-wifi-frequencies: > > + type: boolean > > + description: > > > + Should the pixel frequencies in the WiFi frequencies range be > > + avoided? >=20 > Based on googling the issue, perhaps should be a common property? This is a fairly generic issue indeed, but went for the most non-intrusive way. Do you have a better idea of a generic name, or do you just want me to drop the vendor prefix? Maxime --u4bs7qtkzx5ibc3n Content-Type: application/pgp-signature; name="signature.asc" -----BEGIN PGP SIGNATURE----- iHUEABYIAB0WIQRcEzekXsqa64kGDp7j7w1vZxhRxQUCX3SCewAKCRDj7w1vZxhR xR6PAP9FsndGYY6v0exCfbGLeQIs4y5yblaoV5yQPygk9VDPOQD9GeC07fLj3UJQ Yph2AlUG43iC5/XHQuxmhu+6Qyigowg= =DlkQ -----END PGP SIGNATURE----- --u4bs7qtkzx5ibc3n--