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=-4.2 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS, USER_AGENT_SANE_1 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 1CE08C4743C for ; Mon, 21 Jun 2021 10:59:37 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id EB7A6610CA for ; Mon, 21 Jun 2021 10:59:36 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229663AbhFULBu (ORCPT ); Mon, 21 Jun 2021 07:01:50 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:39064 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229641AbhFULBt (ORCPT ); Mon, 21 Jun 2021 07:01:49 -0400 Received: from mail-ed1-x52a.google.com (mail-ed1-x52a.google.com [IPv6:2a00:1450:4864:20::52a]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 99B90C061574; Mon, 21 Jun 2021 03:59:34 -0700 (PDT) Received: by mail-ed1-x52a.google.com with SMTP id h2so4797683edt.3; Mon, 21 Jun 2021 03:59:34 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=date:from:to:cc:subject:message-id:references:mime-version :content-disposition:in-reply-to:user-agent; bh=mQxqixLK5rjqMvfwNndLJU9kpq2UUMss0IdRDqE4Nyc=; b=YxZQAdUUkLMQ2M2mYkUfSjDJ+SB9P+64CPFg3uK5hM1E/C6K8NmCvjI6fxDHBrBoe5 Lq7cJ78pC6eJoQL/iMslWnzhkAluJRJRKlpXrcHJnAUBY4LLp/MkPZU7sYhkLRFqBEPl 0uRZq36q9MKx0pTNYdZeSNZVZbFJ3t7QfDM1AYpc6XcFG9PqXhyyIxdCa5GYj1KE51gX CERelqx0rdtwMVSq94UjUjpVTG8H0AvhhKV8qm464N8P+VLib7JBniwt5Gxc5ZaGVkw8 lQDzEpiPMwHEZaSZ1PmHvgWOeshz1XWPFZ9zBPPsG67Jh3+Her1tkKd/DUdiLjAtUvJM joSA== 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:user-agent; bh=mQxqixLK5rjqMvfwNndLJU9kpq2UUMss0IdRDqE4Nyc=; b=njVvNvWBWgtdZ4Zc1jjo/ZF+k+3FXSkkPtDGHEfIuLP+Cg8Q9uCnfWcBTBgSvJIMSs spH7Wi3g8Umr3zNOgt84mH79d/Mtcq9IJBJTn/n8zKcsV2lXDfYqv1X6M5DaRDhtHH9/ UiXbotFVdvKNAhqNhmlFpb35u/y8F/X7RL0y1WBOBRnstIadJxdk3WaxEMiWw0P1bgsy YXt+l0h06hjYfLNU0p9Un549obS2D+RHtnaIa78e28HEEss+KGkwPDp6d1hLDpjx15Gy oi04iO7HjJv1IAtdz234B6p0Abkz1bhwS3rUpN06abQEvh9Si9QhlUeGy799pSpvdvXa OXjQ== X-Gm-Message-State: AOAM531ZSS2Xkjy6w9PUPPET8Jm84LZJ+AnSx4Dx8slY5KBeboBZiaJo bRz/+oQ1c4cgV4bUWeq8B7w= X-Google-Smtp-Source: ABdhPJygm2GSM+8x1mA8AMigPK6YI6mwpzcBwg47WwZ0gmXyzshqwUTK6KliNuLXNpTFL6h27g8Z5Q== X-Received: by 2002:a50:fd1a:: with SMTP id i26mr6912086eds.181.1624273173262; Mon, 21 Jun 2021 03:59:33 -0700 (PDT) Received: from localhost ([62.96.65.119]) by smtp.gmail.com with ESMTPSA id c15sm7817001edu.19.2021.06.21.03.59.31 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 21 Jun 2021 03:59:32 -0700 (PDT) Date: Mon, 21 Jun 2021 13:01:28 +0200 From: Thierry Reding To: Dmitry Osipenko Cc: linux-tegra@vger.kernel.org, linux-pm@vger.kernel.org, linux-kernel@vger.kernel.org, dri-devel@lists.freedesktop.org, Matt Merhar , Jonathan Hunter , Peter Geis , Nicolas Chauvet , =?utf-8?B?TWljaGHFgiBNaXJvc8WCYXc=?= Subject: Re: [PATCH v18 0/2] Add memory bandwidth management to NVIDIA Tegra DRM driver Message-ID: References: <20210601042108.1942-1-digetx@gmail.com> <8accfe1e-fc48-21ca-f7c6-bd2d60162e6d@gmail.com> <50912a57-aa43-58b0-02d2-6928578d6286@gmail.com> MIME-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha256; protocol="application/pgp-signature"; boundary="hHIGeTg/3zFQR6Mt" Content-Disposition: inline In-Reply-To: <50912a57-aa43-58b0-02d2-6928578d6286@gmail.com> User-Agent: Mutt/2.0.7 (481f3800) (2021-05-04) Precedence: bulk List-ID: X-Mailing-List: linux-tegra@vger.kernel.org --hHIGeTg/3zFQR6Mt Content-Type: text/plain; charset=utf-8 Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On Mon, Jun 21, 2021 at 07:19:15AM +0300, Dmitry Osipenko wrote: > 07.06.2021 01:40, Dmitry Osipenko =D0=BF=D0=B8=D1=88=D0=B5=D1=82: > > 01.06.2021 07:21, Dmitry Osipenko =D0=BF=D0=B8=D1=88=D0=B5=D1=82: > >> This series adds memory bandwidth management to the NVIDIA Tegra DRM d= river, > >> which is done using interconnect framework. It fixes display corruptio= n that > >> happens due to insufficient memory bandwidth. > >> > >> Changelog: > >> > >> v18: - Moved total peak bandwidth from CRTC state to plane state and r= emoved > >> dummy plane bandwidth state initialization from T186+ plane hub= =2E This > >> was suggested by Thierry Reding to v17. > >> > >> - I haven't done anything about the cursor's plane bandwidth which > >> doesn't contribute to overlapping bandwidths for a small sized > >> window because it works okay as-is. > >=20 > > Thierry, will you take these patches for 5.14? > >=20 >=20 > The display controller does _NOT_WORK_ properly without bandwidth > management. That's surprising. So either it has never worked before (which I think I'd know) or something has caused this regression recently. In the latter case we need to identify what that was and revert (or fix) it. > Can we get this patch into 5.14? What is the problem? There was not enough time to review and test this, so I didn't feel comfortable picking it up so close to the -rc6 cut-off. I plan to pick this up early in the v5.14 release cycle and target v5.15. 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