[PATCH v6 10/26] drm/i915/psr: Print Panel Replay status instead of frame lock status

[Manna, Animesh]

> -----Original Message-----
> From: Hogander, Jouni <jouni.hogander at intel.com>
> Sent: Thursday, June 6, 2024 9:08 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 10/26] drm/i915/psr: Print Panel Replay status instead
> of frame lock status
> 
> On Thu, 2024-06-06 at 14:35 +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 10/26] drm/i915/psr: Print Panel Replay status
> > > instead of frame lock status
> > >
> > > Currently Panel Replay status printout is printing frame lock
> > > status. It should print Panel Replay status instead. Panel Replay
> > > status register field follows PSR status register field. Use
> > > existing PSR code for that.
> > >
> > > Fixes: ef75c25e8fed ("drm/i915/panelreplay: Debugfs support for
> > > panel
> > > replay")
> > > Signed-off-by: Jouni Högander <jouni.hogander at intel.com>
> > > ---
> > >  drivers/gpu/drm/i915/display/intel_psr.c | 22 +++++---------------
> > > --
> > >  1 file changed, 5 insertions(+), 17 deletions(-)
> > >
> > > diff --git a/drivers/gpu/drm/i915/display/intel_psr.c
> > > b/drivers/gpu/drm/i915/display/intel_psr.c
> > > index 7bdae0d0ea45..3530e5f44096 100644
> > > --- a/drivers/gpu/drm/i915/display/intel_psr.c
> > > +++ b/drivers/gpu/drm/i915/display/intel_psr.c
> > > @@ -3579,16 +3579,9 @@ static int i915_psr_sink_status_show(struct
> > > seq_file *m, void *data)
> > >                 "reserved",
> > >                 "sink internal error",
> > >         };
> > > -       static const char * const panel_replay_status[] = {
> > > -               "Sink device frame is locked to the Source device",
> > > -               "Sink device is coasting, using the VTotal target",
> > > -               "Sink device is governing the frame rate (frame rate
> > > unlock is granted)",
> > > -               "Sink device in the process of re-locking with the
> > > Source device",
> > > -       };
> > >         const char *str;
> > >         int ret;
> > >         u8 status, error_status;
> > > -       u32 idx;
> > >
> > >         if (!(CAN_PSR(intel_dp) || CAN_PANEL_REPLAY(intel_dp))) {
> > >                 seq_puts(m, "PSR/Panel-Replay Unsupported\n"); @@
> > > -3602,16 +3595,11 @@ static int i915_psr_sink_status_show(struct
> > > seq_file *m, void *data)
> > >         if (ret)
> > >                 return ret;
> > >
> > > -       str = "unknown";
> > > -       if (intel_dp->psr.panel_replay_enabled) {
> > > -               idx = (status & DP_SINK_FRAME_LOCKED_MASK) >>
> > > DP_SINK_FRAME_LOCKED_SHIFT;
> > > -               if (idx < ARRAY_SIZE(panel_replay_status))
> > > -                       str = panel_replay_status[idx];
> > > -       } else if (intel_dp->psr.enabled) {
> > > -               idx = status & DP_PSR_SINK_STATE_MASK;
> > > -               if (idx < ARRAY_SIZE(sink_status))
> > > -                       str = sink_status[idx];
> > > -       }
> > > +       status &= DP_PSR_SINK_STATE_MASK;
> > > +       if (status < ARRAY_SIZE(sink_status))
> > > +               str = sink_status[status];
> > > +       else
> > > +               str = "unknown";
> >
> > psr_get_status_and_error_status() is returning frame-locked-status for
> > panel replay, Its different dpcd
> > DP_SINK_DEVICE_PR_AND_FRAME_LOCK_STATUS, not same like psr.
> 
> Panel Replay STATUS ~= PSR STATUS if you look at description of the
> registers. Frame lock status is completely different thing. I don't understand
> why psr sink status debugfs interface should print frame lock status for Panel
> Replay?

If we do not want to print DP_SINK_DEVICE_PR_AND_FRAME_LOCK_STATUS the psr_get_status_and_error_status() need to be modified. Do you agree?

Regards,
Animesh 
> 
> BR,
> 
> Jouni Högander
> 
> >
> > Regards,
> > Animesh
> >
> > >
> > >         seq_printf(m, "Sink %s status: 0x%x [%s]\n",
> > > psr_mode_str(intel_dp), status, str);
> > >
> > > --
> > > 2.34.1
> >