Question regarding framebuffer driver.

[Aleksandr Rybalko]

Hi Vijay!

vt_fb driver is a simple consumer, it just use passed info about location
of FrameBuffer in memory and its properties, like width/height/colors/etc.
So if display keeps blank, you have to check correctness of passed data.
Or maybe even writing  driver that prepare graphic subsystem to work with
FB.

Thanks.

вт, 16 лип. 2019 о 15:22 Vijay Kumar Banerjee <vijaykumar9597 at gmail.com>
пише:

> Hello everyone,
>
> I'm working on porting the framebuffer driver to RTEMS with Beaglebone
> Black as the target device. I have have already ported the am335x_lcd,
> tda19988, fbd and VT drivers, but the screen doesn't seem to "power up".
> From the FreeBSD bootlog (12-RELEASE), I see that the screen is
> turning on after the VT initialization message, so I guess it's something
> that happens after the vt initialization that turns the screen on.
>
> So far I have ported the vt_fb and vt_core and it boots up well with the
> message :
> VT: initialize with new VT driver "fb".
>
> But the screen doesn't seem to turn on. Can someone please tell me
> or point me to the right place in code that is responsible for turning the
> screen on after VT initialization?
>
> Thank you,
> Vijay
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WBW
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Rybalko Aleksandr <ray at ddteam.net>