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Date: Thu, 16 May 2013 06:39:49 -0700
From: Eric Nelson <eric.nelson@boundarydevices.com>
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To: "PAPARO Nino (MM)" <nino.paparo@magnetimarelli.com>
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Subject: Re: resolution not changing
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Hi Nino,

On 05/16/2013 05:58 AM, PAPARO Nino (MM) wrote:
> Hi,
> I'm having a similar issue with a 800x480 rgb screen, I'd like to change the colordepth to 24.
> The uboot setting I'm using is:
>
> setenv bootargs $bootargs video=mxcfb0:dev=lcd,CLAA-WVGA,if=RGB666
>
> and I tried setting it to:
>
> setenv bootargs $bootargs video=mxcfb0:dev=lcd,800x480,if=RGB24
>

I think you want 800x480M@60 here instead of 800x480.

> but this does'nt seem to work.
> Any help would be appreciated.
>
> Nino
>

The "if=RGBx" parameter controls the output pixel format to match the
display. It doesn't change the frame-buffer memory layout.

For that, you want to use the 'bpp=N' flag.

setenv bootargs $bootargs video=mxcfb0:dev=lcd,CLAA-WVGA,bpp=24,if=RGB666

You can verify this after boot by looking in /sys:
	# cat /sys/class/graphics/fb0/bits_per_pixel

Regards,


Eric