linux-kernel - Re: [PATCH] ARM: dts: imx: Correct B850v3 clock assignment

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Message-ID: <20170712083109.GK3172@dragon>
Date:   Wed, 12 Jul 2017 16:31:10 +0800
From:   Shawn Guo <shawnguo@...nel.org>
To:     Romain Perier <romain.perier@...labora.com>
Cc:     Sascha Hauer <kernel@...gutronix.de>,
        Fabio Estevam <fabio.estevam@....com>,
        devicetree@...r.kernel.org, Rob Herring <robh+dt@...nel.org>,
        Ian Campbell <ijc+devicetree@...lion.org.uk>,
        Pawel Moll <pawel.moll@....com>,
        Mark Rutland <mark.rutland@....com>,
        Kumar Gala <galak@...eaurora.org>,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        Martyn Welch <martyn.welch@...labora.co.uk>
Subject: Re: [PATCH] ARM: dts: imx: Correct B850v3 clock assignment

On Fri, Jun 30, 2017 at 03:43:37PM +0200, Romain Perier wrote:
> From: Martyn Welch <martyn.welch@...labora.co.uk>
> 
> The IPU that drives HDMI must have its pre_sel set to pll2_pfd_396m
> to avoid stepping on the LVDS output's toes, as the PLL can't be clocked
> to the pixel clock and to the LVDS serial clock (3.5*pixel clock) at the
> same time.
> 
> As we are using ipu1_di0 and ipu2_di0, ensure both are switched to
> to pll2_pfd2_396m to avoid issues. The LDB driver will switch the
> required IPU to ldb_di1 when it uses it to drive LVDS.
> 
> Signed-off-by: Martyn Welch <martyn.welch@...labora.co.uk>
> Signed-off-by: Romain Perier <romain.perier@...labora.com>

Applied, thanks.