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 bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 38E81C47DD9 for ; Sun, 25 Feb 2024 03:22:45 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:In-Reply-To:MIME-Version:References: Message-ID:Subject:Cc:To:From:Date:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=+bQ36V5/ZHk8l2BMyj7xWzm3kHKinz/5U5pIEgv8lWE=; b=kOqwqsL7OyCG50 R4+oKyS+XFh3oA5oaCv4OQA4X4cL6A/vLL0zvIL/G/70CWRadFX4ekeR/DsVOaTours0j5bSJviWp o0jspmRRnu79YYOwPYTZzI1r+bjC+fyPkfWt8x+StS+uLjq5JGZBKvfbtVuabXFCAUahMOhx0xlfg 2vj+M0ZIF3iuTZYGXJhTGMC/NV2j0aD1hdtfoSXTw0+k0Xe9gGfmNaDhU5HuQVimKBJafX4EtJMXj eSJ1L4FG3AYubuoTipev1csHIVGza1MmhpUAvJiJKkVOAkVZ50hd87BQwYO2Eqg0Ve0WlXfD8Cx+5 c0yszu2fqI0piXexDq8g==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.97.1 #2 (Red Hat Linux)) id 1re562-0000000EAB6-0Dvl; Sun, 25 Feb 2024 03:22:34 +0000 Received: from mail-177131.yeah.net ([123.58.177.131]) by bombadil.infradead.org with esmtp (Exim 4.97.1 #2 (Red Hat Linux)) id 1re55y-0000000EA9l-0cOv for linux-arm-kernel@lists.infradead.org; Sun, 25 Feb 2024 03:22:31 +0000 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=yeah.net; s=s110527; h=Date:From:Subject:Message-ID:MIME-Version: Content-Type; bh=kstgYFnYbS4TM+8qLmC87++xXjnye/1CI6vcEBA0fnI=; b=Jfef2hm9LFdr/bzxrSTS8LHUdMaXye0reEtq23oBTRBuzBGfudVbv6oKqNC5HG 2POCsxwCZrfdWP/kloxpPxY+JPoAo3GOOsDdIp87x7kLu/khU/eBSckKuWs4cHLG /1ZeV9Kmzz38GBAw4jm3pMirfeuaLAt4eQilURT6H7z7c= Received: from dragon (unknown [183.213.196.200]) by smtp1 (Coremail) with SMTP id ClUQrADX3O1kstplwDhRBA--.11765S3; Sun, 25 Feb 2024 11:22:14 +0800 (CST) Date: Sun, 25 Feb 2024 11:22:12 +0800 From: Shawn Guo To: Adam Ford Cc: linux-arm-kernel@lists.infradead.org, marex@denx.de, aford@beaconembedded.com, Rob Herring , Krzysztof Kozlowski , Conor Dooley , Shawn Guo , Sascha Hauer , Pengutronix Kernel Team , Fabio Estevam , NXP Linux Team , devicetree@vger.kernel.org, linux-kernel@vger.kernel.org Subject: Re: [PATCH] arm64: dts: imx8mn: Slow default video_pll clock rate Message-ID: References: <20240211231508.188567-1-aford173@gmail.com> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <20240211231508.188567-1-aford173@gmail.com> X-CM-TRANSID: ClUQrADX3O1kstplwDhRBA--.11765S3 X-Coremail-Antispam: 1Uf129KBjvdXoW7GryrXr1UWFy8GF4fXFWrZrb_yoW3Gwc_ur W5JF4vkw15Xrs3Kr1DKF45Zw1xZa129Fy5Xw1kWr4vgry8Za95ta4kZF1ruF17Wa9a934D X3s5Xr1a9rZxAjkaLaAFLSUrUUUUjb8apTn2vfkv8UJUUUU8Yxn0WfASr-VFAUDa7-sFnT 9fnUUvcSsGvfC2KfnxnUUI43ZEXa7IU8z6wtUUUUU== X-Originating-IP: [183.213.196.200] X-CM-SenderInfo: pvkd40hjxrjqh1hdxhhqhw/1tbiDg+PZVszYWG3kAACsm X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20240224_192230_619101_E9E36D1A X-CRM114-Status: GOOD ( 10.98 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org On Sun, Feb 11, 2024 at 05:15:08PM -0600, Adam Ford wrote: > Since commit 8208181fe536 ("clk: imx: composite-8m: > Add imx8m_divider_determine_rate") the lcdif controller has > had the ability to set the disp_pixel_clk rate which propagates > up the tree and sets the video_pll rate automatically. > > By setting this value low, it will force the recalculation of > video_pll to the lowest rate needed by lcdif instead of > dividing a larger clock down to the desired clock speed. This > has the advantage of being able to lower the video_pll rate > from 594MHz to 148.5MHz when operating at 1080p. It can go even > lower when operating at lower resolutions and refresh rates. > > Signed-off-by: Adam Ford Applied, thanks! _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel