[PATCH] ep93xx: add framebuffer support to edb93xx boards

[Martin Guy]

On Fri, Jan 7, 2011 at 11:38 PM, H Hartley Sweeten
<hartleys at visionengravers.com> wrote:
> The ep9307, ep9312, and ep9315 variants of the ep93xx processor include the
> raster engine needed for framebuffer support.
>
> This allows the EDB93xx boards with those processors to use the framebuffer
> driver.
>
> Tested on an EDB9307A with the following kernel parameters:
>        video=640x480-16 at 60
>        video=1024x768-16 at 60
>
> Signed-off-by: H Hartley Sweeten <hsweeten at visionengravers.com>

The code looks good, but there are hardware bugs in the EP93XX that
make the screen image jump a few pixels to the right once every few
seconds.  We found that 800x600-16 and 1024x768-8 were the highest
modes that are stable.
Did you find 1024x768-16 to be stable, say when running X and moving a
window? The effect was most visible on a phosphor CRT, less noticeable
on an LCD.

    M