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 Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 511C3C7EE22 for ; Wed, 10 May 2023 18:43:35 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230331AbjEJSne (ORCPT ); Wed, 10 May 2023 14:43:34 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:40766 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229461AbjEJSne (ORCPT ); Wed, 10 May 2023 14:43:34 -0400 Received: from mail-ej1-x636.google.com (mail-ej1-x636.google.com [IPv6:2a00:1450:4864:20::636]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id E59EA8F; Wed, 10 May 2023 11:43:32 -0700 (PDT) Received: by mail-ej1-x636.google.com with SMTP id a640c23a62f3a-9659e9bbff5so1380937866b.1; Wed, 10 May 2023 11:43:32 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20221208; t=1683744211; x=1686336211; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=gq7FGBBCVUWg9J5mCHnrCLlt8OqBW6wcJOJEyZGAjTU=; b=bmqkK9YGPu+Dx9JKP0oGXBndlrDSdWNiog1vFSUuZI0DvCy+7UmDadEPQTNfWgTOkS 1bzucwXk1rJ74lAUkDBcwOfw7QkyVFfAkQNvjGr/22/3IiGyKfi1WZ6FtHe+et3MTS0G DiaEan1VTKwjOg1VQ2icxdFSJlBcQGvicNobmsXb56tbONBfx+0O0bc5lFjlseDZ/0av Yk8Bn2n1oXTrZFabtWVmJmjf5dSnU0Axt1NUKGfMjVJbnZw+eFmRKHAp97IKd8vUiCkh m4Jr80UbW7FLE/oWq3QHKlBQZvvjd8QgbF+cKqyd2E/+8ekX7bkuc9MmwQFaGP/mEu0f gXQg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1683744211; x=1686336211; h=content-transfer-encoding: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=gq7FGBBCVUWg9J5mCHnrCLlt8OqBW6wcJOJEyZGAjTU=; b=gAOISCBAX+je840lNslBcHM5KKIq3EdjSCsUpiUkUIg3ASEieAJ9c6Zo5LwB7DAX0k iWWk7X3AjcQPjchDB5QzzqS1LRFCnZGMG3d6HCjIzY3L+5gfRVEjcZvzrpghsnEIJKad tWBanViqabrwte/tPi+l6C0f2DpYAv1xTFWaoaJiX7KDtoNqdhfIKByE17Fw5HrokOJj hDr1a2zAT+g45vzOguTeRQ1Ax1vn4DWsyGwxQWG2GAd1qUbF6YM8RbHiyoDKKhNbbbma YAbIIQ5sxPc9PI5fCd3uD+1PnnV8m+fU1s6OYC/eLRgF+z8sWS+a2ImnX5Zd+sTUOa8X PjHw== X-Gm-Message-State: AC+VfDzQaFyY8nEx7mvz+g1YcNDEfXeDKreZw5EcbeGFeNahZ9KI7Uwu V6Z0BYZOZEht5Fb6kqNAQKY= X-Google-Smtp-Source: ACHHUZ5qQHPAak3fJENQzWiF5faDzhV/CfrF6o5JZeuLw4jsNWWDaYlpbOzCCgyE3kmTmGrXn0ZNzQ== X-Received: by 2002:a17:907:7f14:b0:94f:9acc:65c9 with SMTP id qf20-20020a1709077f1400b0094f9acc65c9mr16822802ejc.66.1683744211262; Wed, 10 May 2023 11:43:31 -0700 (PDT) Received: from jernej-laptop.localnet (82-149-1-233.dynamic.telemach.net. [82.149.1.233]) by smtp.gmail.com with ESMTPSA id jz24-20020a17090775f800b0096347ef816dsm3003796ejc.64.2023.05.10.11.43.29 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 10 May 2023 11:43:30 -0700 (PDT) From: Jernej =?utf-8?B?xaBrcmFiZWM=?= To: Maxime Ripard , David Airlie , Daniel Vetter , Chen-Yu Tsai , Samuel Holland , Michael Turquette , Stephen Boyd , Rob Herring , Krzysztof Kozlowski , Roman Beranek Cc: Frank Oltmanns , Icenowy Zheng , Ondrej Jirman , devicetree@vger.kernel.org, dri-devel@lists.freedesktop.org, linux-arm-kernel@lists.infradead.org, linux-sunxi@lists.linux.dev, linux-clk@vger.kernel.org, linux-kernel@vger.kernel.org Subject: Re: [PATCH v4 1/4] clk: sunxi-ng: a64: force select PLL_MIPI in TCON0 mux Date: Wed, 10 May 2023 20:43:29 +0200 Message-ID: <5674988.DvuYhMxLoT@jernej-laptop> In-Reply-To: <20230505052110.67514-2-me@crly.cz> References: <20230505052110.67514-1-me@crly.cz> <20230505052110.67514-2-me@crly.cz> MIME-Version: 1.0 Content-Transfer-Encoding: 7Bit Content-Type: text/plain; charset="us-ascii" Precedence: bulk List-ID: X-Mailing-List: linux-clk@vger.kernel.org Dne petek, 05. maj 2023 ob 07:21:07 CEST je Roman Beranek napisal(a): > TCON0's source clock can be fed from either PLL_MIPI, or PLL_VIDEO0(2X), > however MIPI DSI output only seems to work when PLL_MIPI is selected and > thus the choice must be hardcoded in. > > Currently, this driver can't propagate rate change from N-K-M clocks > (such as PLL_MIPI) upwards. This prevents PLL_VIDEO0 from participating > in setting of the TCON0 data clock rate, limiting the precision with > which a target pixel clock can be matched. > > For outputs with fixed TCON0 divider, that is DSI and LVDS, the dotclock > can deviate up to 8% off target. > > Signed-off-by: Roman Beranek Reviewed-by: Jernej Skrabec Best regards, Jernej