Messages in this thread | | | Date | Fri, 12 Sep 2014 20:48:01 +1000 | Subject | Re: vga and 64-bit memcpy's | From | Dave Airlie <> |
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On 12 September 2014 20:26, Alan Cox <alan@lxorguk.ukuu.org.uk> wrote: > On Fri, 12 Sep 2014 13:57:20 +1000 > Dave Airlie <airlied@gmail.com> wrote: > >> Got an bug report from someone using a silicon motion video card in >> VGA mode about corruption that they tracked down to 64-bit memory >> operations not being supported by the video card, it appears that we >> probably shouldn't be using > 32-bit copies on VGA memory. > > VGA memory is write combining usually so the answer in general would be > no. You may also find its a combination of bridge and card and one or the > other is somehow out of spec.
Well I'm not shocked that an SMI GPU is out of spec, just not sure how we can workaround it.
Dave.
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