On Tue, May 21, 2013 at 03:28:34PM +0300, ville.syrjala at linux.intel.com wrote: > From: Ville Syrj?l? <ville.syrjala at linux.intel.com> > > The specs are a bit unclear whether the per-plane trickle feed disable > control exists on VLV. There is another trickle feed disable control > in the MI_ARB register. > > Based on some quick register dumps from Jani's VLV machine, the per-plane > bits don't actually seem to exist, so I'm guessing we should use the > MI_ARB method instead. I think neither. I'm guessing this behaviour is covered by 'Note: On mobile products this bit will be ignored such that Trickle Feed is always disabled.' in the DSP.CNTR spec. And I don't think MI_ARB_STATE is applicable as it wasn't used for the display block VLV was based upon. Being VPN-less I can't actually dig through the VLV bspec to confirm. -Chris -- Chris Wilson, Intel Open Source Technology Centre
