[PATCH v6 11/26] drm/i915/psr: Move vblank length check to separate function

[Manna, Animesh]

> -----Original Message-----
> From: Hogander, Jouni <jouni.hogander at intel.com>
> Sent: Thursday, June 6, 2024 9:12 PM
> To: Manna, Animesh <animesh.manna at intel.com>; intel-
> gfx at lists.freedesktop.org
> Cc: Kahola, Mika <mika.kahola at intel.com>
> Subject: Re: [PATCH v6 11/26] drm/i915/psr: Move vblank length check to
> separate function
> 
> On Thu, 2024-06-06 at 14:58 +0000, Manna, Animesh wrote:
> >
> >
> > > -----Original Message-----
> > > From: Hogander, Jouni <jouni.hogander at intel.com>
> > > Sent: Wednesday, June 5, 2024 3:56 PM
> > > To: intel-gfx at lists.freedesktop.org
> > > Cc: Manna, Animesh <animesh.manna at intel.com>; Kahola, Mika
> > > <mika.kahola at intel.com>; Hogander, Jouni <jouni.hogander at intel.com>
> > > Subject: [PATCH v6 11/26] drm/i915/psr: Move vblank length check to
> > > separate function
> > >
> > > We are about to add more complexity to vblank length check. It makes
> > > sense to move it to separate function for sake of clarity.
> > >
> > > Signed-off-by: Jouni Högander <jouni.hogander at intel.com>
> > > ---
> > >  drivers/gpu/drm/i915/display/intel_psr.c | 18 +++++++++++++++---
> > >  1 file changed, 15 insertions(+), 3 deletions(-)
> > >
> > > diff --git a/drivers/gpu/drm/i915/display/intel_psr.c
> > > b/drivers/gpu/drm/i915/display/intel_psr.c
> > > index 3530e5f44096..23c3fed1f983 100644
> > > --- a/drivers/gpu/drm/i915/display/intel_psr.c
> > > +++ b/drivers/gpu/drm/i915/display/intel_psr.c
> > > @@ -1243,6 +1243,20 @@ static int
> > > intel_psr_entry_setup_frames(struct
> > > intel_dp *intel_dp,
> > >         return entry_setup_frames;
> > >  }
> > >
> > > +static bool vblank_length_valid(struct intel_dp *intel_dp,
> > > +                               const struct intel_crtc_state
> > > *crtc_state) {
> >
> > As this function specific to psr2, maybe good to have name as
> > psr2_vblank_length_valid(). Otherwise the changes looks ok to me.
> 
> Please check patch 19. That is actually moving this to be common for Panel
> Replay and PSR.

How about su_vblank_length_valid() ? this function is specific to psr2/pr and the name sounds generic to me.

Regards,
Animesh

> 
> BR,
> 
> Jouni Högander
> 
> >
> > Regards,
> > Animesh
> > > +       int vblank = crtc_state->hw.adjusted_mode.crtc_vblank_end -
> > > +               crtc_state->hw.adjusted_mode.crtc_vblank_start;
> > > +       int wake_lines = psr2_block_count_lines(intel_dp);
> > > +
> > > +       /* Vblank >= PSR2_CTL Block Count Number maximum line count
> > > */
> > > +       if (vblank < wake_lines)
> > > +               return false;
> > > +
> > > +       return true;
> > > +}
> > > +
> > >  static bool intel_psr2_config_valid(struct intel_dp *intel_dp,
> > >                                     struct intel_crtc_state
> > > *crtc_state)  { @@ -
> > > 1333,9 +1347,7 @@ static bool intel_psr2_config_valid(struct
> > > intel_dp *intel_dp,
> > >         }
> > >
> > >         /* Vblank >= PSR2_CTL Block Count Number maximum line count
> > > */
> > > -       if (crtc_state->hw.adjusted_mode.crtc_vblank_end -
> > > -           crtc_state->hw.adjusted_mode.crtc_vblank_start <
> > > -           psr2_block_count_lines(intel_dp)) {
> > > +       if (!vblank_length_valid(intel_dp, crtc_state)) {
> > >                 drm_dbg_kms(&dev_priv->drm,
> > >                             "PSR2 not enabled, too short vblank
> > > time\n");
> > >                 return false;
> > > --
> > > 2.34.1
> >