Re: bugs!

[Lucas Correia Villa Real <lucasvr@gobolinux.org>]

Ops, it's the opposite :-)

Lucas


On Friday 14 May 2004 20:14, Lucas Correia Villa Real wrote:
> Hi again,
>
> I've fixed the non-linefetch error: I was passing the virtual framebuffer
> address into fix.smem_start instead of the physical one. Things got weird
> then when fb_writeb() tryied to write on that address ;-)
>
> Cheers,
> Lucas
>
> On Friday 14 May 2004 01:30, Lucas Correia Villa Real wrote:
> > Hi!
> >
> > I'm almost finished with my driver for the monochromatic ST7565 LCD, but
> > I'm dealing with a bug that I could't solve by the entire day.
> >
> > It was designed to be run as a module, and it's living together with
> > another display that already owns the console devices. So, when I load
> > st7565's module, it just skips take_over_console() code in fbmem.c and
> > starts to accept write()'s on it.
> >
> > By the way, I got some demo applications from MicroWindows
> > (microwindows.org) that starts to get more information from the driver.
> > It looks like when they request st7565_set_cmap(), some invalid pointer
> > is accessed and the driver just dies:
> >
> > Unhandled fault: external abort on non-linefetch (0x00a) at 0x4001a004
> > pgd = c3d78000
> > *pgd = 0bcaf001, *pmd = 0bcaf001, *pte = c4a5e0b3, *ppte = c4a5eff2
> >
> > I've looked at other drivers' routines, such as hgafb, and it really
> > looks to be everything on the right place. I got the impression that this
> > error could be happening due to the fact that my driver didn't get the
> > console's ownership, so I've disabled the other driver and compiled
> > st7565 built-in, but then the driver dies with the same message at
> > take_over_console().
> >
> > Does anyone know if hgafb is a working driver that I could rely on? Also
> > I got confused by the need to use or not a color pallete -- probably I
> > don't need, as I'm working only with black/white, but at this time I'm no
> > more sure about anything at all :-)
> >
> > I'm also confused about the "setcolreg()" function passed to
> > fb_get_cmap(). What should it do? What's the meaning of its 1st
> > parameter, "regno"?
> >
> > If someone could take a time to give a quick look on my set_cmap()
> > routine, I've uploaded the code here:
> >
> > http://cscience.org/~lucasvr/etc/st7565.c
> >
> > Thanks in advance, any help will be very appreciated!
> > Lucas
> >
> >
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