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=-2.4 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,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 C85BEC3F2CE for ; Fri, 28 Feb 2020 01:25:19 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 9E6FA246A1 for ; Fri, 28 Feb 2020 01:25:19 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=chromium.org header.i=@chromium.org header.b="Ncbm2mMT" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1730532AbgB1BZS (ORCPT ); Thu, 27 Feb 2020 20:25:18 -0500 Received: from mail-pj1-f47.google.com ([209.85.216.47]:37959 "EHLO mail-pj1-f47.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1729984AbgB1BZS (ORCPT ); Thu, 27 Feb 2020 20:25:18 -0500 Received: by mail-pj1-f47.google.com with SMTP id a16so230021pju.3 for ; Thu, 27 Feb 2020 17:25:17 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=chromium.org; s=google; h=date:from:to:cc:subject:message-id:references:mime-version :content-disposition:in-reply-to:user-agent; bh=58TaW2PPYK05khBxPe9LT47jiedjBGNDrtGrrUs1u3Q=; b=Ncbm2mMT+BUZspKp+izFI9pTKdcn/wuxNopxCdc+FNMBTN28s9HrD6HQkijmPK/4uf Cpt/X9JYHVue0jt5JHSN1kUxmlZvxvd3LKw3c6CHRcGEEw6UEoo4lWz0WPl1PQ++GTEu 0DFl1e2Q0A8H4NSkKyNQPnL1u9SCipXFU/ALw= 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=58TaW2PPYK05khBxPe9LT47jiedjBGNDrtGrrUs1u3Q=; b=Wlla/E8VJWovlSgr0PD727WiIWd2G1uyc6T5GRkRmwBdexRwAQWW0zcCjaO7u5f4cU asgiLNuVexV5A6YeKm+EWdC4Xco+1LcFvnHfvvv0ZN9bK/vd4Np2g+VmboD3fIIri+n4 UWA7jQJLFt0L9WS9J6txRPZvQVA5H6rlsdFgCZEdcir7J0egezlPOnohNoPnw82VP0Mj zFef5z66X3/u4MDwXU6/3HZnL8gDOVQMt5QWEbR04eGuTZDDOvdMvNfxvKo/FVatq4YC bPgjwlFflGKoCXU2QEcVQpqVyR9hhU9xdXOQk7+OAJXzK+9gCq6xaWjJutsbqa7WPvCN BBpQ== X-Gm-Message-State: APjAAAUc/6ctK7BT8dN8SA/HJ6HPViuWbzNBmpz5HfbFkqCLXUn2szJr yhGYmVJLSKIJO0RCjEpqgoFaYQ== X-Google-Smtp-Source: APXvYqz0TaAAJ/YT/CSTJPWpcfSSIRqy1k66k7ROqL3oLI3lJVKdpvUI4kTUQ9kJQo9qVimv3treNQ== X-Received: by 2002:a17:90a:d585:: with SMTP id v5mr1910474pju.4.1582853117366; Thu, 27 Feb 2020 17:25:17 -0800 (PST) Received: from localhost ([2401:fa00:8f:203:5bbb:c872:f2b1:f53b]) by smtp.gmail.com with ESMTPSA id r8sm7577529pjo.22.2020.02.27.17.25.16 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 27 Feb 2020 17:25:16 -0800 (PST) Date: Fri, 28 Feb 2020 10:25:14 +0900 From: Sergey Senozhatsky To: Hans Verkuil Cc: Sergey Senozhatsky , Hans Verkuil , Tomasz Figa , Mauro Carvalho Chehab , Kyungmin Park , Marek Szyprowski , Sakari Ailus , Laurent Pinchart , Pawel Osciak , linux-media@vger.kernel.org, linux-kernel@vger.kernel.org Subject: Re: [PATCHv3 01/11] videobuf2: add cache management members Message-ID: <20200228012514.GL122464@google.com> References: <20200226111529.180197-1-senozhatsky@chromium.org> <20200226111529.180197-2-senozhatsky@chromium.org> <3c20606f-5cde-47d3-afd2-d1bbde668136@xs4all.nl> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <3c20606f-5cde-47d3-afd2-d1bbde668136@xs4all.nl> User-Agent: Mutt/1.12.2 (2019-09-21) Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On (20/02/27 12:55), Hans Verkuil wrote: > On 2/26/20 12:15 PM, Sergey Senozhatsky wrote: > > Extend vb2_buffer and vb2_queue structs with cache management > > members. > > > > V4L2 UAPI already contains two buffer flags which user-space, > > supposedly, can use to control buffer cache sync: > > > > - V4L2_BUF_FLAG_NO_CACHE_INVALIDATE > > - V4L2_BUF_FLAG_NO_CACHE_CLEAN > > > > None of these, however, do anything at the moment. This patch > > set is intended to change it. > > > > Since user-space cache management hints are supposed to be > > implemented on a per-buffer basis we need to extend vb2_buffer > > struct with two new memebers ->need_cache_sync_on_prepare and > > memebers -> members > meme bears :) -ss