On Wed, 2011-11-16 at 09:20 -0500, Matthew Garrett wrote: > The drm core currently waits 5 seconds from userspace dropping a request > for vblanks to vblanks actually being disabled. This appears to be a > workaround for broken hardware, but results in a mostly idle desktop > generating a huge number of wakeups that are entirely unnecessary but which > consume measurable amounts of power. This patchset makes the vblank timeout > per-device rather than global, making it easy for drivers to override the > behaviour without compromising other graphics hardware in the system. It > then removes the delay on Intel hardware. I've tested this successfully on > Sandybridge without any evidence of spurious or missing irqs, but I don't > know how well it works on older hardware. Feedback not only welcome, but > positively desired. Looks good to me. I'll test this on some other intel kit I've got handy. For the series: Reviewed-by: Adam Jackson <ajax@xxxxxxxxxx> - ajax
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