linux-kernel - Re: mxsfb on i.MX28 uses bypassed ref

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Message-ID: <CAOMZO5BaHRDjomihd-_4-5g8peEwLGkQh0MtqEKqDfV-YnDk+g@mail.gmail.com>
Date:	Mon, 20 May 2013 12:11:18 -0300
From:	Fabio Estevam <festevam@...il.com>
To:	Hector Palacios <hector.palacios@...i.com>
Cc:	Fabio Estevam <fabio.estevam@...escale.com>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	Marek Vasut <marex@...x.de>,
	"shawn.guo@...aro.org" <shawn.guo@...aro.org>
Subject: Re: mxsfb on i.MX28 uses bypassed ref_xtal 24MHz clock for LCD

On Mon, May 20, 2013 at 11:59 AM, Hector Palacios
<hector.palacios@...i.com> wrote:

> Agh. Now it works on the EVK. I had something wrong with the backlight
> (maybe a bad DTB).
>
> Do you have any comment on the fact that the lcdif clock is bypassed to the
> 24MHz ref clock? Doesn't this make useless the definition of pixelclk for
> the different displays in mach-mxs.c?
> You can only obtain whole divisors of this frequency (24, 12, 6, 4), which
> may not be accurate enough to fit some displays.

I haven't had a chance to look at it yet, but feel free to submit
patches if you think you can improve the driver.

Thanks,

Fabio Estevam
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