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=-10.8 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,INCLUDES_PATCH,MAILING_LIST_MULTI, SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED autolearn=ham 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 7F690C4727C for ; Tue, 29 Sep 2020 19:00:59 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 1798420774 for ; Tue, 29 Sep 2020 19:00:59 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1601406059; bh=IBWWB7zEftwbQNdoN+LrRSeIPk6o4/kG3R1mCOvx4fc=; h=Date:From:To:Cc:Subject:References:In-Reply-To:List-ID:From; b=czDXO/VtvRSY9ke+ptni4H8LB39ofPODfv5vPUJhrDZfejUGIDUuGb3Kq3jxjoVV8 iQb4+ZSOarXS2hKv6YUxQoiKitkqOnOr/BeTWx2X1YZrm7QUJQHu8UaLyYoKtqFe8Q 5080drSCKYLMhYsgbTBCkGHu7DTwgWW1+Dgo1KjE= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728210AbgI2TA6 (ORCPT ); Tue, 29 Sep 2020 15:00:58 -0400 Received: from mail-oo1-f67.google.com ([209.85.161.67]:42115 "EHLO mail-oo1-f67.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728172AbgI2TA6 (ORCPT ); Tue, 29 Sep 2020 15:00:58 -0400 Received: by mail-oo1-f67.google.com with SMTP id g26so1554937ooa.9 for ; Tue, 29 Sep 2020 12:00:57 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:date:from:to:cc:subject:message-id:references :mime-version:content-disposition:in-reply-to; bh=6sxjm/h53ZlWGhKVi/BI1snEk9zxjIfEAdpeaGtQZss=; b=FpMNqWQXFCswxIheQIXip051Dew5S8VVmx8CLG0OVbf++29fOC1tamgPh+cs2kYNdS UiBj69KnC9UIszpU4M2h1Bw7uLDYO9j3eAoA7ZZZYUW8q+31LxKbJJA5wmzQ9Vkg04hk TtOKldryIKg2fpn7vBoP6Zp5wEk6wcqcDCkRHDe3kceKpvUcI82o9Gl8xUtP5P2CQU/5 SKxPSzWKKnidiMGfWYOiKNAdtxy4yfASNovIK5I0EZXyhRfp7lZHxQRrbhhQLq41wcm8 IyiYd0E+j8Ti7RtAcGrwsfstO3C2yjUiuDVy9m28TXmGeYGBAJabKBJLru1SFN7V6ZsD eUPg== X-Gm-Message-State: AOAM531GUhrWo9s8idNh5DZJEbo0N6vysyAPCoOZbdTzBV7kP3TdMyqK AizlC/IJs/AfVX2C4LrIFg== X-Google-Smtp-Source: ABdhPJygoarE7ZwUXPOTJGxm/lFQ5wLlJdb3eJvCxODi77a6glDpIAOe4kc8T1X/FTVh57MwugQfSA== X-Received: by 2002:a4a:d38c:: with SMTP id i12mr5643217oos.81.1601406057182; Tue, 29 Sep 2020 12:00:57 -0700 (PDT) Received: from xps15 (24-155-109-49.dyn.grandenetworks.net. [24.155.109.49]) by smtp.gmail.com with ESMTPSA id c12sm1194876otm.61.2020.09.29.12.00.56 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 29 Sep 2020 12:00:56 -0700 (PDT) Received: (nullmailer pid 968417 invoked by uid 1000); Tue, 29 Sep 2020 19:00:55 -0000 Date: Tue, 29 Sep 2020 14:00:55 -0500 From: Rob Herring To: Maxime Ripard 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: <20200929190055.GA962101@bogus> References: <20200925130744.575725-1-maxime@cerno.tech> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20200925130744.575725-1-maxime@cerno.tech> Precedence: bulk List-ID: X-Mailing-List: devicetree@vger.kernel.org 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. > > In such a case, we can either reject entirely the mode, or lower slightly > the pixel frequency to remove the overlap. Let's go for the latter. > > 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(-) > > diff --git a/Documentation/devicetree/bindings/display/brcm,bcm2711-hdmi.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 > > + raspberrypi,disable-wifi-frequencies: > + type: boolean > + description: > > + Should the pixel frequencies in the WiFi frequencies range be > + avoided? Based on googling the issue, perhaps should be a common property?