[U-Boot] Beginner question: need help about LVDS channels for i.MX6Q SabreSD Board

[Fabio Estevam]

Hi Igor,

On Fri, Apr 26, 2013 at 12:17 PM, Igor Ferrara
<Igor.Ferrara at dotsystem.it> wrote:
> Hi,
> I have a Freescale SabreSD board with an i.MX6 quad-core processor.
> I'm using u-boot-2009.08 (released with Freescale's LTIB)

This list is about the official U-boot project, not the 2009.08 port from FSL.

> I would like to enable both LVDS channels.

In mainline U-boot there is support for one LVDS panel in mx6qsabrelite board.

You can use it as reference and add LVDS panel support in mx6qsabresd.

Please send us the patches.

> In the "lcd_enable" func (file: /
> board/freescale/mx6q_sabresd/mx6q_sabresd.c) I properly changed some
> registers following the advice of Freescale but I could not enable the
> second channel:
> https://community.freescale.com/docs/DOC-93617
> Furthermore, the "ipuv3_fb_init" func is used to initialize a single
> Display Interface.
> Can you give me some advice to enable both channels?

What is exactly your use case? Do you really need dual display support
in U-boot?

Can't you just boot fast and use the dual display support that kernel
already provides?

Regards,

Fabio Estevam