Re: [directfb-dev] [Linux-fbdev-devel] DirectFB without FBDev

[Sven Luther <sven-XkLrfMvk983aVgXGlvhGPA@public.gmane.org>]

On Wed, May 28, 2008 at 08:07:10PM +0200, Denis Oliver Kropp wrote:
> Brian G. Rhodes wrote:
> I don't think a new kernel graphics interface should be added, instead using
> UIO to access MMIO, DMA and IRQs would be enough and implement most of the
> graphics driver in user space. Downside is to loose the kernel console which
> you usually don't need on an embedded device...
> 
> For acceleration and DMA/IRQ based programming, I still need to check if a
> user space approach would be enough. So far I always handled IRQs in kernel
> space for timing/performance reasons...

Euh, well, i think the X / OpenGL approach showed us that to do DMA/IRQ,
you need a kernel module, and what X/OpenGL is the DRI thingy.

Would it make sense for directfb to re-use this selfsame infrasturcture,
which already exists in the kernel, and is used by X, so kind of
guaranteed to be available for many graphic cards ? 

But maybe it is too complex or something ? 

Friendly,

Sven Luther