[U-Boot] [PATCH 10/10] RFC: Test code for glacier PCI video support

Bin Meng bmeng.cn at gmail.com
Thu Jan 8 05:46:28 CET 2015


Hi Simon,

On Tue, Dec 30, 2014 at 10:32 AM, Simon Glass <sjg at chromium.org> wrote:
> NOT TO APPLY
>
> This shows how to enable video for the glacier board, as an example of the
> emulator working on a VESA-compliant graphics card.
>
> Signed-off-by: Simon Glass <sjg at chromium.org>
> ---
>

Did you test a PCIe video card on chromebook_link? Looks like there
are things we still need to do to support VGA rom on x86. In the
bridge control (offset 0x3e) register of the PCI bridge, there is a
VGA enable bit which currently U-Boot does not configure. I believe
this will stop video card from working. However, so far I even cannot
read the content of the VGA rom (all returns 0xFF) after I manually
enabled this VGA enable bit. Do you know what may cause this?

[snip]

Regards,
Bin


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