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=-0.9 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 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 8166BC32771 for ; Mon, 6 Jan 2020 08:47:20 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 5089D2072C for ; Mon, 6 Jan 2020 08:47:19 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=redhat.com header.i=@redhat.com header.b="SLxAWrN2" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1725843AbgAFIrS (ORCPT ); Mon, 6 Jan 2020 03:47:18 -0500 Received: from us-smtp-delivery-1.mimecast.com ([207.211.31.120]:29688 "EHLO us-smtp-1.mimecast.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1725446AbgAFIrS (ORCPT ); Mon, 6 Jan 2020 03:47:18 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1578300436; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: in-reply-to:in-reply-to:references:references; bh=LuwmtFiuk4QC6AlCiv2QuDvl6ZNYkiBQJ/wWpvPHom0=; b=SLxAWrN2T5lktIaY+V0PuNTxElms5HK1+m6RXCB0tEs0DYQbKX80zlMG9Biq60JV507FpR +nX/tWCaOWI0VOurkj1Kv2SCmOqebAjLvYKWLo7rJuxyrdOgaO/TYHmnPd7SGECzX1WrKq ZnQS1Dx+/SelmuNSEveyRsbA8RKMpIk= Received: from mimecast-mx01.redhat.com (mimecast-mx01.redhat.com [209.132.183.4]) (Using TLS) by relay.mimecast.com with ESMTP id us-mta-299-Xg-vGluqNHK1In-eZEA4YA-1; Mon, 06 Jan 2020 03:47:13 -0500 X-MC-Unique: Xg-vGluqNHK1In-eZEA4YA-1 Received: from smtp.corp.redhat.com (int-mx02.intmail.prod.int.phx2.redhat.com [10.5.11.12]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id 3D070100550E; Mon, 6 Jan 2020 08:47:10 +0000 (UTC) Received: from sirius.home.kraxel.org (ovpn-116-98.ams2.redhat.com [10.36.116.98]) by smtp.corp.redhat.com (Postfix) with ESMTP id 876D660F89; Mon, 6 Jan 2020 08:47:02 +0000 (UTC) Received: by sirius.home.kraxel.org (Postfix, from userid 1000) id 66A356DF9; Mon, 6 Jan 2020 09:47:01 +0100 (CET) Date: Mon, 6 Jan 2020 09:47:01 +0100 From: Gerd Hoffmann To: Dmitry Sepp Cc: Keiichi Watanabe , virtio-dev@lists.oasis-open.org, linux-media@vger.kernel.org, acourbot@chromium.org, alexlau@chromium.org, daniel@ffwll.ch, dgreid@chromium.org, egranata@google.com, fziglio@redhat.com, hverkuil@xs4all.nl, marcheu@chromium.org, posciak@chromium.org, spice-devel@lists.freedesktop.org, stevensd@chromium.org, tfiga@chromium.org, uril@redhat.com Subject: Re: [PATCH v2 1/1] virtio-video: Add virtio video device specification Message-ID: <20200106084701.3v5eew3bh4nh67sc@sirius.home.kraxel.org> References: <20191218130214.170703-1-keiichiw@chromium.org> <20191218130214.170703-2-keiichiw@chromium.org> <2358784.0s52YacUgI@os-lin-dmo> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <2358784.0s52YacUgI@os-lin-dmo> X-Scanned-By: MIMEDefang 2.79 on 10.5.11.12 Sender: linux-media-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-media@vger.kernel.org Hi, > How should one deal with multiplanar formats? Do we create one resource per > plane? Otherwise we need a way to send mem entries for each plane in one > request. DRM uses arrays of handles and offsets (see struct drm_framebuffer). A handle references a gem object (roughly the same as a resource), and the offset specifies the start of the plane within the gem object. That allows both a single gem object with planes stored at different offsets and one gem object per plane. virtio-video could do the same, or pick one of the two approaches and support only that. cheers, Gerd From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: virtio-dev-return-6597-cohuck=redhat.com@lists.oasis-open.org Sender: List-Post: List-Help: List-Unsubscribe: List-Subscribe: Received: from lists.oasis-open.org (oasis-open.org [10.110.1.242]) by lists.oasis-open.org (Postfix) with ESMTP id A8A1E984400 for ; Mon, 6 Jan 2020 08:47:17 +0000 (UTC) Date: Mon, 6 Jan 2020 09:47:01 +0100 From: Gerd Hoffmann Message-ID: <20200106084701.3v5eew3bh4nh67sc@sirius.home.kraxel.org> References: <20191218130214.170703-1-keiichiw@chromium.org> <20191218130214.170703-2-keiichiw@chromium.org> <2358784.0s52YacUgI@os-lin-dmo> MIME-Version: 1.0 In-Reply-To: <2358784.0s52YacUgI@os-lin-dmo> Subject: [virtio-dev] Re: [PATCH v2 1/1] virtio-video: Add virtio video device specification Content-Type: text/plain; charset=WINDOWS-1252 Content-Transfer-Encoding: quoted-printable Content-Disposition: inline To: Dmitry Sepp Cc: Keiichi Watanabe , virtio-dev@lists.oasis-open.org, linux-media@vger.kernel.org, acourbot@chromium.org, alexlau@chromium.org, daniel@ffwll.ch, dgreid@chromium.org, egranata@google.com, fziglio@redhat.com, hverkuil@xs4all.nl, marcheu@chromium.org, posciak@chromium.org, spice-devel@lists.freedesktop.org, stevensd@chromium.org, tfiga@chromium.org, uril@redhat.com List-ID: Hi, > How should one deal with multiplanar formats? Do we create one resource p= er=20 > plane? Otherwise we need a way to send mem entries for each plane in one= =20 > request. DRM uses arrays of handles and offsets (see struct drm_framebuffer). A handle references a gem object (roughly the same as a resource), and the offset specifies the start of the plane within the gem object. That allows both a single gem object with planes stored at different offsets and one gem object per plane. virtio-video could do the same, or pick one of the two approaches and support only that. cheers, Gerd --------------------------------------------------------------------- To unsubscribe, e-mail: virtio-dev-unsubscribe@lists.oasis-open.org For additional commands, e-mail: virtio-dev-help@lists.oasis-open.org