On Sat, Dec 28, 2013 at 11:27 AM, Tom Li <biergaizi2...@gmail.com> wrote: > Anyone who has a YeeLoong Laptop will find the graphics performance is > unacceptable. Even just run dmesg, the output will take a lot of time. > > In fact, there is a built-in 2D acceleration in SM712, the video chip of > YeeLoong. And the driver which supports the acceleration, appeared in the > early-days pull request of YeeLoong to the Linux Kernel. > > But, later on, a crucial bug had been found. > >> it may make the whole system hang when scrolling the screen, for example, >> if we >> copy some files from another machines to yeeloong via scp and the screen >> output is enabled, the whole system may hang. > > So, developers had to remove the acceleration-related code. Then, we got > poor performance on the text-mode framebuffer - until today. If we can fix > up the buggy driver, the output will become 10x faster at least. > > I just a user of YeeLoong, who don't have enough knowledge to work with that > driver. And I noticed the issue. I'm sending the email to provided the > information for anybody interest in hacking and debugging the driver for the > community. > > Any discussion are welcomed.
As far as I can tell, the acceleration capabilities of the SM712 are basically useless for desktops today, but I suppose they'd be usable for text-mode framebuffers. If you're using X, make sure you're using a pixman >= 0.26.0 with my loongson optimizations enabled. See http://mattst88.com/blog/2012/05/17/Optimizing_pixman_for_Loongson:_Process_and_Results/ I would bet that an xterm with fast pixman would satisfy you. -- You received this message because you are subscribed to the Google Groups "loongson-dev" group. To unsubscribe from this group and stop receiving emails from it, send an email to loongson-dev+unsubscr...@googlegroups.com. To post to this group, send email to loongson-dev@googlegroups.com. Visit this group at http://groups.google.com/group/loongson-dev. For more options, visit https://groups.google.com/groups/opt_out.
