Re: [Intel-gfx] [PATCH 4/5] drm/i915: Do vlv cmnlane toggle w/a in more cases

2014-11-03 Thread Daniel Vetter
On Tue, Oct 28, 2014 at 08:12:30PM +0200, Ville Syrjälä wrote: > On Tue, Oct 28, 2014 at 10:57:38AM -0700, Jesse Barnes wrote: > > On Thu, 16 Oct 2014 20:52:33 +0300 > > ville.syrj...@linux.intel.com wrote: > > > > > From: Ville Syrjälä > > > > > > In case the cmnlane power well is down but cmnr

Re: [Intel-gfx] [PATCH 4/5] drm/i915: Do vlv cmnlane toggle w/a in more cases

2014-10-28 Thread Ville Syrjälä
On Tue, Oct 28, 2014 at 10:57:38AM -0700, Jesse Barnes wrote: > On Thu, 16 Oct 2014 20:52:33 +0300 > ville.syrj...@linux.intel.com wrote: > > > From: Ville Syrjälä > > > > In case the cmnlane power well is down but cmnreset isn't asserted we > > would currently skip the off+on toggle for the pow

Re: [Intel-gfx] [PATCH 4/5] drm/i915: Do vlv cmnlane toggle w/a in more cases

2014-10-28 Thread Jesse Barnes
On Thu, 16 Oct 2014 20:52:33 +0300 ville.syrj...@linux.intel.com wrote: > From: Ville Syrjälä > > In case the cmnlane power well is down but cmnreset isn't asserted we > would currently skip the off+on toggle for the power well. That could > leave cmnreset deasserted while cmnlane is powered dow

[Intel-gfx] [PATCH 4/5] drm/i915: Do vlv cmnlane toggle w/a in more cases

2014-10-16 Thread ville . syrjala
From: Ville Syrjälä In case the cmnlane power well is down but cmnreset isn't asserted we would currently skip the off+on toggle for the power well. That could leave cmnreset deasserted while cmnlane is powered down which might lead to problems with the PHY. To avoid such issues skip the cmnlane