Hi Maarten, On 27 July 2012 19:09, Maarten Lankhorst maarten.lankhorst@canonical.com wrote:
A dma-fence can be attached to a buffer which is being filled or consumed by hw, to allow userspace to pass the buffer without waiting to another device. For example, userspace can call page_flip ioctl to display the next frame of graphics after kicking the GPU but while the GPU is still rendering. The display device sharing the buffer with the GPU would attach a callback to get notified when the GPU's rendering-complete IRQ fires, to update the scan-out address of the display, without having to wake up userspace.
Since Rob is the original author of this (and I the next?), may I request you to re-submit with his "From:" bit?
Rob / Daniel: comments on this series will help me line it up in for-next, and maybe even for 3.7-rc.
Best regards, ~Sumit. <snip>