From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-ej1-f47.google.com (mail-ej1-f47.google.com [209.85.218.47]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 4315C16411 for ; Wed, 10 May 2023 18:43:33 +0000 (UTC) Received: by mail-ej1-f47.google.com with SMTP id a640c23a62f3a-965ab8ed1fcso1379182766b.2 for ; Wed, 10 May 2023 11:43:33 -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=HQa/MlcVJPwzwMH1cNF5gK1vkW65UEeHr35chB+g+dsSRaCpGijAMywO4xkBOxxtRZ UYukhAkJyLHYKmChnA+qT6mc9mAv6RhwHI/8zHrQtOjcWnerZV3O+FOCywsooU3uwq89 FQnVoFUJ0MaQcq992nrCrHhA+zWMOTjYWS7HkxbKk/OUyI9Bjj/z43ELowOckXDu9+Sz yx/LZM7/ytJK3VnTBNVOXSrc1cY4ip0gG7KJzX/j+4gBQxdwP8HGo4J0/+5f/D0eMm0J 3WMXaijw/WE9AGeALcmb/5LALncM5tJ7g5V1jSqFdmhAwONuPvysxivVJo+k0BUdVoda g1tA== X-Gm-Message-State: AC+VfDwKGdrAkoyIsgX7Mout04wph2CjpgVYHcMvi53ZarkxtuD5JX1j 2YaeibcqW6sGi7RdD/ddrOI= 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> Precedence: bulk X-Mailing-List: linux-sunxi@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 7Bit Content-Type: text/plain; charset="us-ascii" 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