On Wed, Oct 17, 2012 at 10:05:15AM -0700, Jesse Barnes wrote: > On Wed, 17 Oct 2012 09:27:24 -0700 > Jesse Barnes <jbarnes at virtuousgeek.org> wrote: > > > On Wed, 17 Oct 2012 12:09:55 +0100 > > Chris Wilson <chris at chris-wilson.co.uk> wrote: > > > > > No functional change, but reserves 0x2 for use by userspace. > > > > > > Signed-off-by: Chris Wilson <chris at chris-wilson.co.uk> > > > --- > > > drivers/gpu/drm/i915/i915_reg.h | 2 ++ > > > drivers/gpu/drm/i915/intel_pm.c | 10 +++++----- > > > 2 files changed, 7 insertions(+), 5 deletions(-) > > > > Each of the bits in this reg correspond to a specific agent that may > > need to wake the GT. Unfortunately I don't have docs about which bits > > are used by which agents. IIRC the BIOS uses one as does the AMT > > engine if present. > > > > I'll try to find out who owns each and maybe we can reserve our own for > > userspace. > > Ok we're in the clear here. I was afraid there might be other system > components that would do sneaky things behind our back. But once the > driver loads, we own the GT, so we can make these bits whatever we want. I guess that counts for an ack - patch merged to dinq. Thanks, Daniel -- Daniel Vetter Software Engineer, Intel Corporation +41 (0) 79 365 57 48 - http://blog.ffwll.ch
