Re: [Intel-gfx] [RFC PATCH] drm/vblanks: Deal with HW vblank counter resets.

2017-11-07 Thread Pandiyan, Dhinakaran
On Tue, 2017-11-07 at 13:39 +0100, Daniel Vetter wrote: > On Tue, Nov 07, 2017 at 10:47:00AM +0100, Michel Dänzer wrote: > > On 07/11/17 07:26 AM, Dhinakaran Pandiyan wrote: > > > Some HW vblank counters reset due to power management events, which messes > > > up the vblank counting logic. This lea

Re: [RFC PATCH] drm/vblanks: Deal with HW vblank counter resets.

2017-11-07 Thread Daniel Vetter
On Tue, Nov 07, 2017 at 10:47:00AM +0100, Michel Dänzer wrote: > On 07/11/17 07:26 AM, Dhinakaran Pandiyan wrote: > > Some HW vblank counters reset due to power management events, which messes > > up the vblank counting logic. This leads to screen freezes with user space > > waiting on vblank event

Re: [RFC PATCH] drm/vblanks: Deal with HW vblank counter resets.

2017-11-07 Thread Ville Syrjälä
On Tue, Nov 07, 2017 at 11:55:44AM +0100, Michel Dänzer wrote: > On 07/11/17 11:50 AM, Ville Syrjälä wrote: > > On Tue, Nov 07, 2017 at 10:47:00AM +0100, Michel Dänzer wrote: > >> On 07/11/17 07:26 AM, Dhinakaran Pandiyan wrote: > >>> Some HW vblank counters reset due to power management events, wh

Re: [RFC PATCH] drm/vblanks: Deal with HW vblank counter resets.

2017-11-07 Thread Michel Dänzer
On 07/11/17 11:50 AM, Ville Syrjälä wrote: > On Tue, Nov 07, 2017 at 10:47:00AM +0100, Michel Dänzer wrote: >> On 07/11/17 07:26 AM, Dhinakaran Pandiyan wrote: >>> Some HW vblank counters reset due to power management events, which messes >>> up the vblank counting logic. This leads to screen freez

Re: [RFC PATCH] drm/vblanks: Deal with HW vblank counter resets.

2017-11-07 Thread Ville Syrjälä
On Tue, Nov 07, 2017 at 10:47:00AM +0100, Michel Dänzer wrote: > On 07/11/17 07:26 AM, Dhinakaran Pandiyan wrote: > > Some HW vblank counters reset due to power management events, which messes > > up the vblank counting logic. This leads to screen freezes with user space > > waiting on vblank event

Re: [RFC PATCH] drm/vblanks: Deal with HW vblank counter resets.

2017-11-07 Thread Michel Dänzer
On 07/11/17 07:26 AM, Dhinakaran Pandiyan wrote: > Some HW vblank counters reset due to power management events, which messes > up the vblank counting logic. This leads to screen freezes with user space > waiting on vblank events that may not occur if the counter keeps resetting. > > For e.g., Aft

[RFC PATCH] drm/vblanks: Deal with HW vblank counter resets.

2017-11-06 Thread Dhinakaran Pandiyan
Some HW vblank counters reset due to power management events, which messes up the vblank counting logic. This leads to screen freezes with user space waiting on vblank events that may not occur if the counter keeps resetting. For e.g., After the HW vblank counter resets [9.007359] [drm:drm_upd