[PATCH 10/13] drm/irq: Add drm_crtc_vblank_count_and_time()

[Thierry Reding]

On Wed, Aug 12, 2015 at 05:35:08PM +0200, Daniel Vetter wrote:
> On Wed, Aug 12, 2015 at 05:00:32PM +0200, Thierry Reding wrote:
> > From: Thierry Reding <treding at nvidia.com>
> > 
> > This function is the KMS native variant of drm_vblank_count_and_time().
> > It takes a struct drm_crtc * instead of a struct drm_device * and an
> > index of the CRTC.
> > 
> > Eventually the goal is to access vblank data through the CRTC only so
> > that the per-CRTC data can be moved to struct drm_crtc.
> > 
> > Signed-off-by: Thierry Reding <treding at nvidia.com>
> 
> We seem to not use this anywhere outside for drm_irq.c, so maybe just drop
> the kerneldoc and EXPORT_SYMBOL? The actual comment starting with "Fecthes
> the "cooked" vblank ..." should imo be kept.

There don't seem to be any users of this, so I guess we can ignore this
for now.

Thierry

> > ---
> >  drivers/gpu/drm/drm_irq.c | 23 +++++++++++++++++++++++
> >  include/drm/drmP.h        |  2 ++
> >  2 files changed, 25 insertions(+)
> > 
> > diff --git a/drivers/gpu/drm/drm_irq.c b/drivers/gpu/drm/drm_irq.c
> > index f42459b2862d..904914d8f1f1 100644
> > --- a/drivers/gpu/drm/drm_irq.c
> > +++ b/drivers/gpu/drm/drm_irq.c
> > @@ -913,6 +913,8 @@ EXPORT_SYMBOL(drm_crtc_vblank_count);
> >   * vblank events since the system was booted, including lost events due to
> >   * modesetting activity. Returns corresponding system timestamp of the time
> >   * of the vblank interval that corresponds to the current vblank counter value.
> > + *
> > + * This is the legacy version of drm_crtc_vblank_count_and_time().
> >   */
> >  u32 drm_vblank_count_and_time(struct drm_device *dev, unsigned int pipe,
> >  			      struct timeval *vblanktime)
> > @@ -939,6 +941,27 @@ u32 drm_vblank_count_and_time(struct drm_device *dev, unsigned int pipe,
> >  }
> >  EXPORT_SYMBOL(drm_vblank_count_and_time);
> >  
> > +/**
> > + * drm_crtc_vblank_count_and_time - retrieve "cooked" vblank counter value
> > + *     and the system timestamp corresponding to that vblank counter value
> > + * @crtc: which counter to retrieve
> > + * @vblanktime: Pointer to struct timeval to receive the vblank timestamp.
> > + *
> > + * Fetches the "cooked" vblank count value that represents the number of
> > + * vblank events since the system was booted, including lost events due to
> > + * modesetting activity. Returns corresponding system timestamp of the time
> > + * of the vblank interval that corresponds to the current vblank counter value.
> > + *
> > + * This is the native KMS version of drm_vblank_count_and_time().
> > + */
> > +u32 drm_crtc_vblank_count_and_time(struct drm_crtc *crtc,
> > +				   struct timeval *vblanktime)
> > +{
> > +	return drm_vblank_count_and_time(crtc->dev, drm_crtc_index(crtc),
> > +					 vblanktime);
> > +}
> > +EXPORT_SYMBOL(drm_crtc_vblank_count_and_time);
> > +
> >  static void send_vblank_event(struct drm_device *dev,
> >  		struct drm_pending_vblank_event *e,
> >  		unsigned long seq, struct timeval *now)
> > diff --git a/include/drm/drmP.h b/include/drm/drmP.h
> > index 020afa343dff..7cd480614035 100644
> > --- a/include/drm/drmP.h
> > +++ b/include/drm/drmP.h
> > @@ -927,6 +927,8 @@ extern u32 drm_vblank_count(struct drm_device *dev, int pipe);
> >  extern u32 drm_crtc_vblank_count(struct drm_crtc *crtc);
> >  extern u32 drm_vblank_count_and_time(struct drm_device *dev, unsigned int pipe,
> >  				     struct timeval *vblanktime);
> > +extern u32 drm_crtc_vblank_count_and_time(struct drm_crtc *crtc,
> > +					  struct timeval *vblanktime);
> >  extern void drm_send_vblank_event(struct drm_device *dev, unsigned int pipe,
> >  				  struct drm_pending_vblank_event *e);
> >  extern void drm_crtc_send_vblank_event(struct drm_crtc *crtc,
> > -- 
> > 2.4.5
> > 
> 
> -- 
> Daniel Vetter
> Software Engineer, Intel Corporation
> http://blog.ffwll.ch
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