From: shawnguo@kernel.org (Shawn Guo)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH] ARM: dts: imx6ul-14x14-evk: switch lcdif pixel clock to video pll
Date: Sat, 14 Oct 2017 23:16:27 +0800 [thread overview]
Message-ID: <20171014151626.GR8833@dragon> (raw)
In-Reply-To: <20171012133019.17086-1-p.zabel@pengutronix.de>
On Thu, Oct 12, 2017 at 03:30:19PM +0200, Philipp Zabel wrote:
> By default, the lcdif_pre_sel mux is switched to the pll3_pfd1_540m PFD
> source. If this mux is allowed to propagate rate changes to its parent,
> setting the LCDIF pixel clock rate to 9 MHz, as required by the LCD
> panel, will cause the pll3_pfd1_540m PFD to be switched away from its
> nominal rate to 288 MHz.
> This has no negative side effects, as there are no other children to
> this PFD. Still, to avoid surprises, it might be preferrable to switch
> to the designated video PLL (pll5_video_div) as clock source for the
> LCDIF pixel clock.
>
> Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>
Applied, thanks.
prev parent reply other threads:[~2017-10-14 15:16 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-10-12 13:30 [PATCH] ARM: dts: imx6ul-14x14-evk: switch lcdif pixel clock to video pll Philipp Zabel
2017-10-12 13:40 ` Fabio Estevam
2017-10-14 15:16 ` Shawn Guo [this message]
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