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=-1.0 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,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 ACEECC433E1 for ; Thu, 2 Jul 2020 18:58:58 +0000 (UTC) Received: from merlin.infradead.org (merlin.infradead.org [205.233.59.134]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 7AF89207CD for ; Thu, 2 Jul 2020 18:58:58 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="PY6zlUsT"; dkim=fail reason="signature verification failed" (2048-bit key) header.d=baylibre-com.20150623.gappssmtp.com header.i=@baylibre-com.20150623.gappssmtp.com header.b="vIYTYR0m" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 7AF89207CD Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=baylibre.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=merlin.20170209; h=Sender:Content-Transfer-Encoding: Content-Type:Cc:List-Subscribe:List-Help:List-Post:List-Archive: List-Unsubscribe:List-Id:MIME-Version:Message-ID:Date:References:In-Reply-To: Subject:To:From:Reply-To:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=+4ggEp8rrrmwUsOOcYeTr4Q14gNbTyfdNk2ZEkUFFZ4=; b=PY6zlUsTA8dYMyKyaQhLnAd9j aS+KG9IQVfhxbHci8SJpvnKLqI1wNAW2obF1YWBKyxGZp6m0xUD3wl9iI1fLU/71mEp/VrP0w4+gN 12JJItyel2ggQ0+ykHrCN2UmdKs/1X0jcpYM7Jm3ebfZFg9HfUAQA5VEQipv2mkllqWRi+UcEOSfs YwAi9CP3xgWozH3dkjuoPPsOPo1vEPGXPkCnAmjX1SW+vMQizSnMxAZYSruvazZI2Cizq+shtphls 63FUFgpPNLny4d+ktucmY2drmyElAjHDEpFXgaDNhUOVRYmcltmj9SSvCNK+T1JqJlGD0husRUm9k BOS7RKKhg==; Received: from localhost ([::1] helo=merlin.infradead.org) by merlin.infradead.org with esmtp (Exim 4.92.3 #3 (Red Hat Linux)) id 1jr4P6-0005jM-F8; Thu, 02 Jul 2020 18:57:48 +0000 Received: from mail-pj1-x1044.google.com ([2607:f8b0:4864:20::1044]) by merlin.infradead.org with esmtps (Exim 4.92.3 #3 (Red Hat Linux)) id 1jr4P1-0005gm-LW for linux-arm-kernel@lists.infradead.org; Thu, 02 Jul 2020 18:57:45 +0000 Received: by mail-pj1-x1044.google.com with SMTP id h22so12910563pjf.1 for ; Thu, 02 Jul 2020 11:57:41 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=baylibre-com.20150623.gappssmtp.com; s=20150623; h=from:to:cc:subject:in-reply-to:references:date:message-id :mime-version; bh=hz4Mj/iQWQ1Gm0J6ofti89mpz3pTQ7LpeTX5svYgVDU=; b=vIYTYR0m8trV9lrGh8PSvAGnzTxA5G6rFm/vi7ItU7DM4fvPTm/3Rl6ME1n7it2B1M T30gPbuZtIE6zll34iGAqLPSdG6bmMkAT7qZrHG23Iy2IrCRlFaNzAsYQxUBUtDS7maR lsMpgjIPLbqvPDQlAxBB7JqNjvFBayTSyW6uH39IJTaZMduCtQ7pwgshj2ZogHfR0AYK rC+JXeUG8Ftfy0mqFWAjEeGKNCPSA+bU+DULdd9p41k1p8IbO6nixuAiWR3klbBC35vM ims47ez4t1jO7VNTh6Q4ji0M92+FQztMbbM3vX5S4RlQYC9J2EyktcqMDI2JKUeROJQS ApcA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:in-reply-to:references:date :message-id:mime-version; bh=hz4Mj/iQWQ1Gm0J6ofti89mpz3pTQ7LpeTX5svYgVDU=; b=fUFgN6XREaVlcCMiVDEMYLwQPnWFcHKjX1n+qQXCP7bqXnwlghAI+Jy62yODQC+zKq Pobo7gHjOj2jJbqwoLEXvidDIpKTpTgXR68ZQAGUxbcG5JegaEAb437EhT66YfOdT5gs Lbdx5zN69KkM1tYZnqYRtbFbM6VNTFE8rbZTZ8BanHZborgEearf5IYMHRoPk2O2NfKM T7iq94Wrnb2SLTaxu3nCT+pA/wXvV2PeLVTCcrYnqfTpdXGPRkTSTmPbXsGUn5hNd+0E SKAjJFdRsLuooLA+bgpyp0kFFlFRTUtuxRKOoEmZP0S2xY8kFmNcTv/tlP421fXT/0Hj Apiw== X-Gm-Message-State: AOAM531BC7CCPezTtRVF2ttevtlGt9AiqY10eGrPB6z7igLvgdsWvrY3 yWgY3ZI74vEFK1C9q/qecvEFbQ== X-Google-Smtp-Source: ABdhPJy7+DRCrQWC1YEAlkN5Qs9h2rvj2F4QBQqw8k6R6J/7z34EhuVEi87Gs/fBbFtsm5CKS4/LNw== X-Received: by 2002:a17:90a:f695:: with SMTP id cl21mr35145208pjb.86.1593716260173; Thu, 02 Jul 2020 11:57:40 -0700 (PDT) Received: from localhost (c-71-197-186-152.hsd1.wa.comcast.net. [71.197.186.152]) by smtp.gmail.com with ESMTPSA id c71sm7396890pje.32.2020.07.02.11.57.39 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 02 Jul 2020 11:57:39 -0700 (PDT) From: Kevin Hilman To: Neil Armstrong , daniel@ffwll.ch, dri-devel@lists.freedesktop.org Subject: Re: [PATCH v8 0/6] drm/meson: add support for Amlogic Video FBC In-Reply-To: <20200702074759.32356-1-narmstrong@baylibre.com> References: <20200702074759.32356-1-narmstrong@baylibre.com> Date: Thu, 02 Jul 2020 11:57:38 -0700 Message-ID: <7himf5iw2l.fsf@baylibre.com> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20200702_145743_858550_E06AED3C X-CRM114-Status: GOOD ( 14.93 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: linux-amlogic@lists.infradead.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, jianxin.pan@amlogic.com, Neil Armstrong Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org Neil Armstrong writes: > Amlogic uses a proprietary lossless image compression protocol and format > for their hardware video codec accelerators, either video decoders or > video input encoders. > > It considerably reduces memory bandwidth while writing and reading > frames in memory. > > The underlying storage is considered to be 3 components, 8bit or 10-bit > per component, YCbCr 420, single plane : > - DRM_FORMAT_YUV420_8BIT > - DRM_FORMAT_YUV420_10BIT > > This modifier will be notably added to DMA-BUF frames imported from the V4L2 > Amlogic VDEC decoder. > > At least two layout are supported : > - Basic: composed of a body and a header > - Scatter: the buffer is filled with a IOMMU scatter table referring > to the encoder current memory layout. This mode if more efficient in terms > of memory allocation but frames are not dumpable and only valid during until > the buffer is freed and back in control of the encoder > > At least two options are supported : > - Memory saving: when the pixel bpp is 8b, the size of the superblock can > be reduced, thus saving memory. > > This serie adds the missing register, updated the FBC decoder registers > content to be committed by the crtc code. > > The Amlogic FBC has been tested with compressed content from the Amlogic > HW VP9 decoder on S905X (GXL), S905D2 (G12A) and S905X3 (SM1) in 8bit > (Scatter+Mem Saving on G12A/SM1, Mem Saving on GXL) and 10bit > (Scatter on G12A/SM1, default on GXL). > > It's expected to work as-is on GXM and G12B SoCs. Reviewed-by: Kevin Hilman Kevin _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel