From patchwork Tue Mar 8 00:09:35 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Brian Norris X-Patchwork-Id: 550284 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 1F7A7C433F5 for ; Tue, 8 Mar 2022 00:10:38 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1344056AbiCHAL2 (ORCPT ); Mon, 7 Mar 2022 19:11:28 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:52034 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1344031AbiCHALM (ORCPT ); Mon, 7 Mar 2022 19:11:12 -0500 Received: from mail-pl1-x630.google.com (mail-pl1-x630.google.com [IPv6:2607:f8b0:4864:20::630]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 635E9377F1 for ; Mon, 7 Mar 2022 16:10:16 -0800 (PST) Received: by mail-pl1-x630.google.com with SMTP id e2so15507472pls.10 for ; Mon, 07 Mar 2022 16:10:16 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=chromium.org; s=google; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=4MidqK8UFH0OO5PuGunb8WphemubCtQBPIxhc/BLNC4=; b=Y7MZ3dBBFqBsHVJw4LhSele0cERRtvLPdhqjvm/dbYuKac/ttY1X7dhkkWQ/tfVGl0 tr7jWz/2apfy1mdwUM7wRiCrcE5/lHX/RNl0+Y4iWCR7Y7j0/7W/RELbflk4b1yVvoVZ zjgTnxNRlNWVX3HyNdCEkxpAZRGe4F+pSxuHM= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=4MidqK8UFH0OO5PuGunb8WphemubCtQBPIxhc/BLNC4=; b=6UTJiXR0C/Iohu3BoJ/IwAFXgzMBdcUBsibhC6dRC6dm+ATb98MnQG+7k1hhMUdvjh 1GU6EII/6yr+QjOZW0mu5h+oFET50/oeBDMkrJiSss63GNBcLYUKYLNcyY8dbx9c7dnf kk0UFUoR6rXp2vHqSCJlD7tCb4pvLF6Tt/qudW2m7Ot7/MymHNL8J8ylzhaS1rsNNMy0 vYIgL9gGcNmQLVWyQinn3+edD+TzAPsUA5rW7l3P3iMlL/lfYoHMhQWV7HBeeqXnviw3 gw2izgWTFXtsCFaKZbvGdlDfzi9QFVrsdm0J6RFv14TOGxTkkaLfKv1/uyMHz+751RE9 9QUA== X-Gm-Message-State: AOAM530Cn0R2wDiQOqJXEpUNRaZtNwNuoDJfFoLVzsYNlR9THLrN7pPP OM8IzfXCDBbJpvxJGE6ejBACKQ== X-Google-Smtp-Source: ABdhPJxEvIqD1klp8jx5ozBpuURKAe+1fn2tbuJrsH1G/PMoec47nH+zhYizJ5ADadhdFnqLvm92UA== X-Received: by 2002:a17:90a:bf86:b0:1bd:6057:b77c with SMTP id d6-20020a17090abf8600b001bd6057b77cmr1688428pjs.72.1646698215650; Mon, 07 Mar 2022 16:10:15 -0800 (PST) Received: from localhost ([2620:15c:202:201:e551:44dc:2842:57f1]) by smtp.gmail.com with UTF8SMTPSA id h6-20020a636c06000000b00363a2533b17sm12943047pgc.8.2022.03.07.16.10.14 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Mon, 07 Mar 2022 16:10:15 -0800 (PST) From: Brian Norris To: MyungJoo Ham , Kyungmin Park , Chanwoo Choi , Rob Herring Cc: Lin Huang , Heiko Stuebner , Derek Basehore , linux-rockchip@lists.infradead.org, linux-kernel@vger.kernel.org, linux-pm@vger.kernel.org, devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org, Brian Norris , Rob Herring Subject: [PATCH v3 05/15] dt-bindings: devfreq: rk3399_dmc: Add more disable-freq properties Date: Mon, 7 Mar 2022 16:09:35 -0800 Message-Id: <20220307160918.v3.5.I382d4de737198ea52deb118c9bdc4d93d76e009e@changeid> X-Mailer: git-send-email 2.35.1.616.g0bdcbb4464-goog In-Reply-To: <20220308000945.706701-1-briannorris@chromium.org> References: <20220308000945.706701-1-briannorris@chromium.org> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-pm@vger.kernel.org DDR DVFS tuning has found that several power-saving features don't have good tradeoffs at higher frequencies -- at higher frequencies, we'll see glitches or other errors. Provide tuning controls so these can be disabled at higher OPPs, and left active only at the lower ones. Signed-off-by: Brian Norris Reviewed-by: Rob Herring --- Changes in v3: * Add Reviewed-by Changes in v2: * hyphens, not underscores * *-hz units, and drop the types definition .../bindings/devfreq/rk3399_dmc.yaml | 37 +++++++++++++++++++ 1 file changed, 37 insertions(+) diff --git a/Documentation/devicetree/bindings/devfreq/rk3399_dmc.yaml b/Documentation/devicetree/bindings/devfreq/rk3399_dmc.yaml index 6a33a7b44741..60ed5023f54f 100644 --- a/Documentation/devicetree/bindings/devfreq/rk3399_dmc.yaml +++ b/Documentation/devicetree/bindings/devfreq/rk3399_dmc.yaml @@ -300,6 +300,38 @@ properties: self-refresh mode. The controller, pi, PHY and DRAM clock will be gated if bus is idle for standby_idle nanoseconds. + rockchip,pd-idle-dis-freq-hz: + description: + Defines the power-down idle disable frequency in Hz. When the DDR + frequency is greater than pd-idle-dis-freq, power-down idle is disabled. + See also rockchip,pd-idle-ns. + + rockchip,sr-idle-dis-freq-hz: + description: + Defines the self-refresh idle disable frequency in Hz. When the DDR + frequency is greater than sr-idle-dis-freq, self-refresh idle is + disabled. See also rockchip,sr-idle-ns. + + rockchip,sr-mc-gate-idle-dis-freq-hz: + description: + Defines the self-refresh and memory-controller clock gating disable + frequency in Hz. When the DDR frequency is greater than + sr-mc-gate-idle-dis-freq, the clock will not be gated when idle. See also + rockchip,sr-mc-gate-idle-ns. + + rockchip,srpd-lite-idle-dis-freq-hz: + description: + Defines the self-refresh power down idle disable frequency in Hz. When + the DDR frequency is greater than srpd-lite-idle-dis-freq, memory will + not be placed into self-refresh power down mode when idle. See also + rockchip,srpd-lite-idle-ns. + + rockchip,standby-idle-dis-freq-hz: + description: + Defines the standby idle disable frequency in Hz. When the DDR frequency + is greater than standby-idle-dis-freq, standby idle is disabled. See also + rockchip,standby-idle-ns. + required: - compatible - devfreq-events @@ -331,4 +363,9 @@ examples: rockchip,ddr3_odt_dis_freq = <333000000>; rockchip,lpddr3_odt_dis_freq = <333000000>; rockchip,lpddr4_odt_dis_freq = <333000000>; + rockchip,pd-idle-dis-freq-hz = <1000000000>; + rockchip,sr-idle-dis-freq-hz = <1000000000>; + rockchip,sr-mc-gate-idle-dis-freq-hz = <1000000000>; + rockchip,srpd-lite-idle-dis-freq-hz = <0>; + rockchip,standby-idle-dis-freq-hz = <928000000>; };