On Wed, Feb 10, 2016 at 7:36 PM, Mario Kleiner
wrote:
> On 02/10/2016 06:17 PM, Daniel Vetter wrote:
>>
>> On Wed, Feb 10, 2016 at 5:28 PM, Mario Kleiner
>> wrote:
>>>
>>> There's another scenario where this zero-ts case can be hit. If the
>>> driver
>>> drm_vblank_init()'s - setting all timestam
On 02/10/2016 06:17 PM, Daniel Vetter wrote:
> On Wed, Feb 10, 2016 at 5:28 PM, Mario Kleiner
> wrote:
>> There's another scenario where this zero-ts case can be hit. If the driver
>> drm_vblank_init()'s - setting all timestamps to zero - and then code starts
>> using vblanks (drm_vblank_get()) wi
On Wed, Feb 10, 2016 at 5:28 PM, Mario Kleiner
wrote:
> There's another scenario where this zero-ts case can be hit. If the driver
> drm_vblank_init()'s - setting all timestamps to zero - and then code starts
> using vblanks (drm_vblank_get()) without drm_vblank_on beforehand, which is
> afaics th
On 02/09/2016 04:03 PM, Daniel Vetter wrote:
> On Tue, Feb 09, 2016 at 04:11:49PM +0200, Ville Syrjälä wrote:
>> On Tue, Feb 09, 2016 at 02:53:30PM +0100, Mario Kleiner wrote:
>>> On 02/09/2016 11:09 AM, Daniel Vetter wrote:
On Mon, Feb 08, 2016 at 02:13:28AM +0100, Mario Kleiner wrote:
On Tue, Feb 09, 2016 at 02:53:30PM +0100, Mario Kleiner wrote:
> On 02/09/2016 11:09 AM, Daniel Vetter wrote:
> > On Mon, Feb 08, 2016 at 02:13:28AM +0100, Mario Kleiner wrote:
> >> The changes to drm_update_vblank_count() in Linux 4.4 added a
> >> method to emulate a hardware vblank counter by use
On Tue, Feb 09, 2016 at 04:11:49PM +0200, Ville Syrjälä wrote:
> On Tue, Feb 09, 2016 at 02:53:30PM +0100, Mario Kleiner wrote:
> > On 02/09/2016 11:09 AM, Daniel Vetter wrote:
> > > On Mon, Feb 08, 2016 at 02:13:28AM +0100, Mario Kleiner wrote:
> > >> The changes to drm_update_vblank_count() in
On 02/09/2016 11:09 AM, Daniel Vetter wrote:
> On Mon, Feb 08, 2016 at 02:13:28AM +0100, Mario Kleiner wrote:
>> The changes to drm_update_vblank_count() in Linux 4.4 added a
>> method to emulate a hardware vblank counter by use of high
>> precision vblank timestamps if a kms driver supports those,
On Mon, Feb 08, 2016 at 02:13:28AM +0100, Mario Kleiner wrote:
> The changes to drm_update_vblank_count() in Linux 4.4 added a
> method to emulate a hardware vblank counter by use of high
> precision vblank timestamps if a kms driver supports those,
> but doesn't suppport hw vblank counters.
>
> T
The changes to drm_update_vblank_count() in Linux 4.4 added a
method to emulate a hardware vblank counter by use of high
precision vblank timestamps if a kms driver supports those,
but doesn't suppport hw vblank counters.
That method assumes that the old timestamp from a previous
invocation is val
