[Intel-gfx] [PATCH 0/2] drm/i915: Gen2 vblank stuff

ville.syrjala at linux.intel.com ville.syrjala at linux.intel.com
Fri Oct 11 20:52:42 CEST 2013

Continuing a bit with improving the vblank timestamp stuff, I decided that
it's also time to fix gen2 properly.

All this time we've been pretending it has the same pixel+frame counter that
gen3 and gen4 have, when in fact it doesn't. Luckily the same offset has
nothing else on gen2, so it has just read out as 0 and everything more or
less worked.

Sadly there doesn't seem to be any frame counter register on gen2. For the
scanout position, DSL + additional tricks works equally well for gen2 as
it does for ctg+.

This series should be applied on top of my earlier vblank/scanout position

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