Re: [ PATCH-LINK ] fb accel capabilities - take 2

["Antonino A. Daplas" <adaplas@hotpop.com>]

On Friday 28 May 2004 11:38, David Eger wrote:
> Thomas Winischhofer eloquently put:
> > David Eger wrote:

> It's all part of fixing bugs ;-)  When my "accelerated" fb driver is still
> super-slow, i consider that a bug.  And it's a bug of the framebuffer
> subsystem, not really of the drivers.  Your lovely

There is also another cause for the slowdown.  Although 2.6 fbcon is slightly 
faster than 2.4 fbcon (not considering other variables such as panning), the 
speed can be increased further more (around 30-50%).  

This is mainly due to the use of sys_inbuf and sys_outbuf, which are used a 
lot, for transferring data from the pixmap when creating the monochrome 
bitmap (for use by xxx_imageblit).  I guess we just need to use standard 
memcopy (or similar), possibly inlined, if the pixmap is in system RAM, and 
only use sys_inbuf and sys_outbuf when the pixmap is in video/DMA/etc memory.

Tony 




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