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=-4.0 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_PASS, URIBL_BLOCKED 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 1CFAEC04AB4 for ; Wed, 15 May 2019 00:01:56 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id E67532082E for ; Wed, 15 May 2019 00:01:55 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=baylibre-com.20150623.gappssmtp.com header.i=@baylibre-com.20150623.gappssmtp.com header.b="tX7XsRCa" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726581AbfEOABk (ORCPT ); Tue, 14 May 2019 20:01:40 -0400 Received: from mail-pg1-f195.google.com ([209.85.215.195]:42344 "EHLO mail-pg1-f195.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726265AbfEOABj (ORCPT ); Tue, 14 May 2019 20:01:39 -0400 Received: by mail-pg1-f195.google.com with SMTP id 145so356355pgg.9 for ; Tue, 14 May 2019 17:01:39 -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=Fl4BRNGtm92dLl/qzsGLS8SvffFbPXXhiHpwATSSiyU=; b=tX7XsRCaevKkmFvq8xy+sLXC6agZnWKTOukEF5WmKqJWO7syyKlQ2wsBCfil36LpLc mGlid7DLUx1dXCo0KeqHIx2sUi4nerLRHCzysY+ERtFErlU4bgmKwSpt/kEySf9ShL99 Nc1Wp8TqRW/KaqEa81fDD/8gvS/tDUs/3ZYzDJmihvXXvXBvle3OYpXPWYJXo/JUYG06 CxmiHlVfWhvL9JU7Cbk4RjA7TQt6iOY0+pKbm5iXrCqvis9BcB18g49DkbteGGEx0pOM ILitRlt7sHfp1a3edNzxFH+/qX+a8srD/b5530Ze8vMyEgOu4CRVYuJiqaNMeCH9g1vi weIA== 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=Fl4BRNGtm92dLl/qzsGLS8SvffFbPXXhiHpwATSSiyU=; b=UnFnExa4EtL0PjB73z0fPMh7U1kYBpCHHglxCn9yu4ktDtdNbKR874XGYmIi0KguL6 kCQiZsSStR+gNUDZSiHZCADBOUJRyywyuee2wLkgNEhC0BGggoRKJopYO7uphN1mTre9 Q09dz7xB82fNhE5v+9mdeZ5gQ8n3p3JtC8ogAYABgsmvk8zIGuJkN2pPH1Vc44uFmr+U gZm5xh60qr/xAlDCTnTeSK70/nlZyaGk9aiwaGPmBVL6tzxIkcL8Wpc+bhcA9Geay18C wwnOXMtyiXnaq24XrjZjASQ+H0GGyd/9YtBvHPRbqGew6f+bIsiAwx4sr+xUYZgxsGfE j30Q== X-Gm-Message-State: APjAAAW88eO8FJPgwdJ+auG7GOHx0tPQEu0cUmIxYARtL6MfhY7hPTaF l11sriqg74D+krVykzSAWJY4kQ== X-Google-Smtp-Source: APXvYqwHZa5sICwqraZ9H1QVEAfGb9MwKOmlBlqopDcas/BnamGKzAjjpLLEttGsYJaVEihf/p/OVQ== X-Received: by 2002:a63:5211:: with SMTP id g17mr11987172pgb.405.1557878498529; Tue, 14 May 2019 17:01:38 -0700 (PDT) Received: from localhost ([2601:602:9200:a1a5:fd66:a9bc:7c2c:636a]) by smtp.googlemail.com with ESMTPSA id a80sm331973pfj.105.2019.05.14.17.01.37 (version=TLS1_2 cipher=ECDHE-RSA-CHACHA20-POLY1305 bits=256/256); Tue, 14 May 2019 17:01:37 -0700 (PDT) From: Kevin Hilman To: Martin Blumenstingl , linux-amlogic@lists.infradead.org Cc: linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, Martin Blumenstingl Subject: Re: [PATCH 1/1] ARM: dts: meson8b: fix the operating voltage of the Mali GPU In-Reply-To: <20190512193936.26557-2-martin.blumenstingl@googlemail.com> References: <20190512193936.26557-1-martin.blumenstingl@googlemail.com> <20190512193936.26557-2-martin.blumenstingl@googlemail.com> Date: Tue, 14 May 2019 17:01:37 -0700 Message-ID: <7hwoisd1r2.fsf@baylibre.com> MIME-Version: 1.0 Content-Type: text/plain Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Martin Blumenstingl writes: > Amlogic's vendor kernel defines an OPP for the GPU on Meson8b boards > with a voltage of 1.15V. It turns out that the vendor kernel relies on > the bootloader to set up the voltage. The bootloader however sets a > fixed voltage of 1.10V. > > Amlogic's patched u-boot sources (uboot-2015-01-15-23a3562521) confirm > this: > $ grep -oiE "VDD(EE|AO)_VOLTAGE[ ]+[0-9]+" board/amlogic/configs/m8b_* > board/amlogic/configs/m8b_m100_v1.h:VDDAO_VOLTAGE 1100 > board/amlogic/configs/m8b_m101_v1.h:VDDAO_VOLTAGE 1100 > board/amlogic/configs/m8b_m102_v1.h:VDDAO_VOLTAGE 1100 > board/amlogic/configs/m8b_m200_v1.h:VDDAO_VOLTAGE 1100 > board/amlogic/configs/m8b_m201_v1.h:VDDEE_VOLTAGE 1100 > board/amlogic/configs/m8b_m201_v1.h:VDDEE_VOLTAGE 1100 > board/amlogic/configs/m8b_m202_v1.h:VDDEE_VOLTAGE 1100 > > Another hint at this is the VDDEE voltage on the EC-100 and Odroid-C1 > boards. The VDDEE regulator supplies the Mali GPU. It's basically a copy > of the VCCK (CPU supply) which means it's limited to 0.86V to 1.14V. > > Update the operating voltage of the Mali GPU on Meson8b to 1.10V so it > matches with what the vendor u-boot sets. > > Fixes: c3ea80b6138cae ("ARM: dts: meson8b: add the Mali-450 MP2 GPU") > Signed-off-by: Martin Blumenstingl Queued as a fix for v5.2-rc (branch: v5.2/fixes) Kevin