[meta-ti] BeagleBone Black , u-boot, and zImage

[Diego Sueiro]

Carlos,

On Mon, Aug 18, 2014 at 6:10 AM, Carlos Rafael Giani <dv at pseudoterminal.org>
wrote:

> I rebuilt the image, with the proper layers, but still I get an incorrect
> u-boot environment. Full u-boot serial output and boot log follow below.
> uname -a prints:  Linux beaglebone 3.14.16 #1 Thu Aug 14 18:00:21 CEST
> 2014 armv7l GNU/Linux
> (the kernel was built by the linux-ti-staging recipe)
>
> The u-boot problem bootfile is set to uImage, and mmcboot uses bootm
> instead of bootz.
>

Your u-boot (2013.04-rc1-14237-g90639fe-dirty) is not the one provided for
meta-ti (2014.07).
Issue these commands:

bitbake virtual/bootloader -ccleansstate
bitbake virtual/bootloader -f




>
> Furthermore, once I correct these two values, it boots, but I see this
> eventually:
>
>   Error opening /dev/fb0: No such file or directory
>
> After a bit of investigation, it turned out that omaplfb wasn't loading
> due to missing symbols:
>
>   root at beaglebone:~# modprobe omaplfb
>   [   83.010309] omaplfb: Unknown symbol register_vsync_cb (err 0)
>   [   83.016642] omaplfb: Unknown symbol unregister_vsync_cb (err 0)
>
> Searching for this, I found
> https://groups.google.com/forum/#!topic/beagleboard/dcLtpK7ZsX0 .
> According to this, in the kernel log, I should set CONFIG_FB_DA8XX to "y".
> Is this still correct for linux-ti-staging 3.14.16 ?
>

To use DRM driver you should set:

CONFIG_DRM=y
CONFIG_DRM_I2C_NXP_TDA998X=y
CONFIG_DRM_TILCDC=y

To use de FB driver:

CONFIG_FB_DA8XX=y
CONFIG_FB_DA8XX_TDA998X=y


Here is a reference:
http://processors.wiki.ti.com/index.php/Linux_Core_LCD_Controller_User_Guide


Regards,

--
*dS
Diego Sueiro

Administrador do Embarcados
www.embarcados.com.br
<http://www.embarcados.com.br/?utm_source=assinatura_diego&utm_medium=e-mail&utm_campaign=Assinatura%20Email%20Diego>

/*long live rock 'n roll*/
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