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Signed-off-by: Amit Pundir --- .../devicetree/bindings/display/msm/qcom,sdm845-mdss.yaml | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/Documentation/devicetree/bindings/display/msm/qcom,sdm845-mdss.yaml b/Documentation/devicetree/bindings/display/msm/qcom,sdm845-mdss.yaml index 6ecb00920d7f..3ea1dbd7e317 100644 --- a/Documentation/devicetree/bindings/display/msm/qcom,sdm845-mdss.yaml +++ b/Documentation/devicetree/bindings/display/msm/qcom,sdm845-mdss.yaml @@ -39,6 +39,11 @@ properties: interconnect-names: maxItems: 2 + memory-region: + maxItems: 1 + description: + Phandle to a node describing a reserved memory region. + patternProperties: "^display-controller@[0-9a-f]+$": type: object From patchwork Wed Jul 12 13:02:15 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Amit Pundir X-Patchwork-Id: 13310353 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 8EBC2EB64D9 for ; Wed, 12 Jul 2023 13:02:54 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233513AbjGLNCw (ORCPT ); Wed, 12 Jul 2023 09:02:52 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:38920 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233389AbjGLNCm (ORCPT ); Wed, 12 Jul 2023 09:02:42 -0400 Received: from mail-ot1-x32c.google.com (mail-ot1-x32c.google.com [IPv6:2607:f8b0:4864:20::32c]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 6CE5F1BD3 for ; Wed, 12 Jul 2023 06:02:29 -0700 (PDT) Received: by mail-ot1-x32c.google.com with SMTP id 46e09a7af769-6b87d505e28so5674806a34.2 for ; Wed, 12 Jul 2023 06:02:29 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; t=1689166948; x=1691758948; h=content-transfer-encoding:author:mime-version:references :in-reply-to:message-id:date:subject:cc:to:from:from:to:cc:subject :date:message-id:reply-to; bh=9T8piHX0bubTIqR5dsadlL99AD9gpATcetHPEAi8jTU=; b=hIzKop+k4OCTCBWq4j/r6OD7aiiXPsd/rQZ1uF4S9TETD/oKB2rDcKczmsx2A0nJe5 NWtDC2qPPGP7IM/wx1RvH78MvjJ6gY/YwivETBUZkh+vDWikLxQdZmap/WtbV5U3p2fE p5OoOEvAFa/9bydOqp6ak9+2bf8q660eCyEzrIC/1SHTOj9MIVPWcntYo5Y0VljtGzHE mgZIlmKBdjkeT3791x7XiE800dSX3/EX7xIgtP5kHtO8nVPlbCyb2u7S6JXlPFNTDwAE UGae6a1Zymrpqo19n1nGtitGuwQJG7H3zK3/7eS7IUQfV708JvhyXubPbr6YmxNuc0TL sKPg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1689166948; x=1691758948; h=content-transfer-encoding:author:mime-version:references :in-reply-to:message-id:date:subject:cc:to:from:x-gm-message-state :from:to:cc:subject:date:message-id:reply-to; bh=9T8piHX0bubTIqR5dsadlL99AD9gpATcetHPEAi8jTU=; b=A1tdSLwCAiTP8twimsTbySMnDn/k5nXN1VLUMgO2MLuNPIfuxmJMzf89Fw0rvpk5an /YY+9gZKjyxNIMzMzorvd1g2/Gtwg81tqoI/lWzj2NyUIyxNQHCOEUxcBUM9zGFQY/L5 H7OTaz0Lamet5kUr8kzIs69ZzFpCQ1WH7jI39MFaFKsPSfKQYT81tEmWsq3FMkp2Kppy QJ51G3QKxXGcp7YsbsSXzp5EMw46luooiYoRUE34amHtJTCjL+rs1PuxcIo/5w0bHPT0 lpqirmHq+JqOo4LahhA0eSWH4z6JJ+ekU3BHll82uVHA4TsWpWJ7DAcboO/T/IZUMZbt 65vg== X-Gm-Message-State: ABy/qLaTPWDxspgkZrt2cSKcFBXk+myQWvkYMGEWlsRfiglFjQ79BK7H Ifiioa1eqrsNGdm7/d1ceauA3Q== X-Google-Smtp-Source: APBJJlHMNeteSeTTb43sYC5YqkHocrWysDwQ9MhmzMKypOa+itOUe2NT1zrkO4ZI8Ox9NbZXCTb+1w== X-Received: by 2002:a05:6358:341f:b0:135:89d6:22e9 with SMTP id h31-20020a056358341f00b0013589d622e9mr1235888rwd.13.1689166948540; Wed, 12 Jul 2023 06:02:28 -0700 (PDT) Received: from x-wing.lan ([49.207.50.231]) by smtp.gmail.com with ESMTPSA id p1-20020a639501000000b0054fe07d2f3dsm3417023pgd.11.2023.07.12.06.02.23 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 12 Jul 2023 06:02:28 -0700 (PDT) From: Amit Pundir To: Bjorn Andersson , Andy Gross , Dmitry Baryshkov , Rob Herring , Konrad Dybcio , Krzysztof Kozlowski , Conor Dooley , Caleb Connolly , Bryan Donoghue , Rob Clark , Abhinav Kumar , Sean Paul , Marijn Suijten , David Airlie , Daniel Vetter , Krishna Manikandan Cc: dri-devel , freedreno , linux-arm-msm , dt , lkml Subject: [PATCH 2/2][v4] arm64: dts: qcom: sdm845-db845c: Mark cont splash memory region as reserved Date: Wed, 12 Jul 2023 18:32:15 +0530 Message-Id: <20230712130215.666924-2-amit.pundir@linaro.org> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20230712130215.666924-1-amit.pundir@linaro.org> References: <20230712130215.666924-1-amit.pundir@linaro.org> MIME-Version: 1.0 Author: Amit Pundir Precedence: bulk List-ID: X-Mailing-List: linux-arm-msm@vger.kernel.org Adding a reserved memory region for the framebuffer memory (the splash memory region set up by the bootloader). Signed-off-by: Amit Pundir --- v4: Re-sending this along with a new dt-bindings patch to document memory-region property in qcom,sdm845-mdss schema and keep dtbs_check happy. v3: Point this reserved region to MDSS. v2: Updated commit message. There was some dicussion on v1 but it didn't go anywhere, https://lore.kernel.org/linux-kernel/20230124182857.1524912-1-amit.pundir@linaro.org/T/#u. The general consensus is that this memory should be freed and be made resuable but that (releasing this piece of memory) has been tried before and it is not trivial to return the reserved memory node to the system RAM pool in this case. arch/arm64/boot/dts/qcom/sdm845-db845c.dts | 9 +++++++++ 1 file changed, 9 insertions(+) diff --git a/arch/arm64/boot/dts/qcom/sdm845-db845c.dts b/arch/arm64/boot/dts/qcom/sdm845-db845c.dts index d6b464cb61d6..f546f6f57c1e 100644 --- a/arch/arm64/boot/dts/qcom/sdm845-db845c.dts +++ b/arch/arm64/boot/dts/qcom/sdm845-db845c.dts @@ -101,6 +101,14 @@ hdmi_con: endpoint { }; }; + reserved-memory { + /* Cont splash region set up by the bootloader */ + cont_splash_mem: framebuffer@9d400000 { + reg = <0x0 0x9d400000 0x0 0x2400000>; + no-map; + }; + }; + lt9611_1v8: lt9611-vdd18-regulator { compatible = "regulator-fixed"; regulator-name = "LT9611_1V8"; @@ -506,6 +514,7 @@ &i2c14 { }; &mdss { + memory-region = <&cont_splash_mem>; status = "okay"; };