From patchwork Thu Dec 3 18:00:40 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Martin Cerveny X-Patchwork-Id: 11949253 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=-18.2 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER, INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED, USER_AGENT_GIT 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 1FA98C4361A for ; Thu, 3 Dec 2020 18:02:45 +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 5DAC6207A2 for ; Thu, 3 Dec 2020 18:02:44 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 5DAC6207A2 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=computer.org 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:Subject:To:From: Reply-To:Content-ID:Content-Description:Resent-Date:Resent-From:Resent-Sender :Resent-To:Resent-Cc:Resent-Message-ID:In-Reply-To:References:List-Owner; bh=NVQ61j3sRm7LQC+LtbDQQxzCW7S/6eTUZmtDz+/B2Fw=; b=1Za55g4Sbr3zeDkLIhU9ttZBlq XWhfX9A8SJH650V1kvaEBGj6vJHhI+utRx6nJw5+L/C+HBuDuLcDoejo9pt0uN2C4gg7NVg/TFH2F NxpMaGz79QT6jJlqsTXZnSgRtL1TgCWFGhtzzRCp8egFFw4uTAMscRjR1MmdPpVXv1DepsolMKmNU NdowW9xsI0w06xznqHNGQ+s0Pawhxh7m6dKhk3j5HEK6S4kRWIavVSycA5aKgeD519GHV2B+4lZUN eYvAy/oQr/jZvMDi+XzKMzxu2xWJ/pz5xzB0CBQTn0sJjWyKp3SVuMBw0CP5iJY2vIsimVfceIGtT vHtrXKiQ==; Received: from localhost ([::1] helo=merlin.infradead.org) by merlin.infradead.org with esmtp (Exim 4.92.3 #3 (Red Hat Linux)) id 1kksv2-0007pT-SX; Thu, 03 Dec 2020 18:01:28 +0000 Received: from casper.infradead.org ([2001:8b0:10b:1236::1]) by merlin.infradead.org with esmtps (Exim 4.92.3 #3 (Red Hat Linux)) id 1kksv0-0007pJ-Hy for linux-arm-kernel@merlin.infradead.org; Thu, 03 Dec 2020 18:01:26 +0000 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=casper.20170209; h=Content-Transfer-Encoding:MIME-Version: Message-Id:Date:Subject:Cc:To:From:Sender:Reply-To:Content-Type:Content-ID: Content-Description:In-Reply-To:References; bh=uClZEyHzaKR96bBUxkYUfdJCHb1eXprqdQf8uLjdxFE=; b=mxqSi9S250v73E9YUcmhJpibOx qX6LclWOTSsqFegfjILjp2+CvUfxRnX3d4Y7ltAxcXmBuwyDBGLKhsvLxJB6+X5uRVSPLh8ssNrh1 j9qCGmrw0XPwjU4sqpEmpr8LSMcq5aih8iMVxLi9mUwO77j6+pLSfgdfsTQudA1fnD5Zr7ud2v44A ABKhp8wYeoam2uIGc2jrlPYz1OXSlk9DYpzY9mvVq7PjXQyU/pPLcmkDBBZpl9O5yHQT5DDmRXN5h 6BEsl9nU1BHYQzFyIQtNshwVXw6cpc7gmrDA64R6zAiB2ldNZimryP6wpMhZvbIVpSCRkcwa0knY6 DAkGyY1A==; Received: from gw.c-home.cz ([89.24.150.100] helo=dmz.c-home.cz) by casper.infradead.org with esmtp (Exim 4.92.3 #3 (Red Hat Linux)) id 1kksuw-0003QB-GC for linux-arm-kernel@lists.infradead.org; Thu, 03 Dec 2020 18:01:25 +0000 Received: from ubuntu2004.c-home.cz (unifi.c-home.cz [192.168.1.227]) by dmz.c-home.cz (8.14.4+Sun/8.14.4) with ESMTP id 0B3I11ap011430; Thu, 3 Dec 2020 19:01:06 +0100 (CET) From: Martin Cerveny To: Chen-Yu Tsai Subject: [PATCH] ARM: dts: sun8i: v3s: SRAM_C real mapping Date: Thu, 3 Dec 2020 19:00:40 +0100 Message-Id: <20201203180040.3284-1-m.cerveny@computer.org> X-Mailer: git-send-email 2.25.1 MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20201203_180122_867844_4E2CD257 X-CRM114-Status: GOOD ( 10.67 ) 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: devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, Maxime Ripard , Rob Herring , Martin Cerveny , linux-arm-kernel@lists.infradead.org Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org VideoEngine (cedrus) needs assign dedicated SRAM for decoding. SRAM_C1 is usually used for Allwinner platforms. Allwinner V3s scale down chip has not SRAM_C1 but only small SRAM_C (44kB). Result of additional testing: SRAM_C is mapped in two regions 0x0000_4000 (primary location, by Datasheet) (size is 0xb000, probably exact size is 0xb0c0 and it is mapped to 4k boundary (to 0x0000_ffff)) and to 0x01d0_4000 (traditional SRAM_C1 region from 0x01d0_0000). Rest of 0x01d0_0000 are discontinuously filled with R/W register sets (probably some internals registers from VE) that I thought to be SRAM too. Programming register SRAM_CTRL_REG0 (0x01c00_0000) with value 0x7fff_ffff switch out whole region 0x01d0_0000-0x01df_ffff and 0x0000_4000-0x0000_ffff (dedicate access to VE). VE/cedrus code use this SRAM region indirectly (VE_AVC_SRAM_PORT_OFFSET/VE_AVC_SRAM_PORT_DATA...) and it is not influenced by "real" SRAM mapping or size so it is working even without this patch. Signed-off-by: Martin Cerveny --- arch/arm/boot/dts/sun8i-v3s.dtsi | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-) diff --git a/arch/arm/boot/dts/sun8i-v3s.dtsi b/arch/arm/boot/dts/sun8i-v3s.dtsi index e8f304125e2d..90d703e5b73b 100644 --- a/arch/arm/boot/dts/sun8i-v3s.dtsi +++ b/arch/arm/boot/dts/sun8i-v3s.dtsi @@ -162,17 +162,17 @@ syscon: system-control@1c00000 { #size-cells = <1>; ranges; - sram_c: sram@1d00000 { + sram_c: sram@4000 { compatible = "mmio-sram"; - reg = <0x01d00000 0x80000>; + reg = <0x4000 0xb000>; #address-cells = <1>; #size-cells = <1>; - ranges = <0 0x01d00000 0x80000>; + ranges = <0 0 0x4000 0xb000>; ve_sram: sram-section@0 { compatible = "allwinner,sun8i-v3s-sram-c1", "allwinner,sun4i-a10-sram-c1"; - reg = <0x000000 0x80000>; + reg = <0x0 0xb000>; }; }; };