On Fri, 30 Nov 2012 11:24:50 +0100, Daniel Vetter <daniel.vetter at ffwll.ch> wrote: > We only need to read/write the south interrupt register if the > corresponding bit is set in the north master interrupt register. > Noticed while reading our interrupt handling code. > > Same optimization has already been applied on ivb in > > commit 0e43406bcc1868a316eea6012a0a09d992c53521 > Author: Chris Wilson <chris at chris-wilson.co.uk> > Date: Wed May 9 21:45:44 2012 +0100 > > drm/i915: Simplify interrupt processing for IvyBridge > > We can take advantage that the PCH_IIR is a subordinate register to > reduce one of the required IIR reads, and that we only need to clear > interrupts handled to reduce the writes. And by simply tidying the code > we can reduce the line count and hopefully make it more readable. > > Signed-off-by: Daniel Vetter <daniel.vetter at ffwll.ch> Reviewed-by: Chris Wilson <chris at chris-wilson.co.uk> -Chris -- Chris Wilson, Intel Open Source Technology Centre
