; > > ; Kuogee Hsieh (QUIC)
> > > ; Andy Gross ;
> > > bjorn.anders...@linaro.org; Rob Herring ;
> > > krzk...@kernel.org; Sean Paul ; David Airlie
> > > ; Daniel Vetter ; Thierry Reding
> > > ; Sam Ravnborg ;
> > > dmitry.barysh...@linaro.org; quic_vproddut
linaro.org; Rob Herring ;
> > krzk...@kernel.org; Sean Paul ; David Airlie
> > ; Daniel Vetter ; Thierry Reding
> > ; Sam Ravnborg ;
> > dmitry.barysh...@linaro.org; quic_vproddut
> > Subject: Re: [PATCH v5 6/9] drm/msm/dp: wait for hpd high before any sink
> >
try.barysh...@linaro.org; quic_vproddut
> Subject: Re: [PATCH v5 6/9] drm/msm/dp: wait for hpd high before any sink
> interaction
>
> Hi,
>
> On Fri, Mar 18, 2022 at 4:27 PM Stephen Boyd
> wrote:
> >
> > > > Pushing hpd state checking into aux transacti
Hi,
On Fri, Mar 18, 2022 at 4:27 PM Stephen Boyd wrote:
>
> > > Pushing hpd state checking into aux
> > > transactions looks like the wrong direction. Also, as I said up above I
> > > am concerned that even checking the GPIO won't work and we need some way
> > > to ask the bridge if HPD is
Quoting Doug Anderson (2022-03-18 14:58:55)
> Hi,
>
> On Fri, Mar 18, 2022 at 1:17 PM Stephen Boyd wrote:
> >
> > > > > + ret = dp_catalog_aux_wait_for_hpd_connect_state(aux->catalog);
> > > >
> > > > Why are we making aux transactions when hpd isn't asserted? Can we only
> > > > register
Hi,
On Fri, Mar 18, 2022 at 1:17 PM Stephen Boyd wrote:
>
> > > > + ret = dp_catalog_aux_wait_for_hpd_connect_state(aux->catalog);
> > >
> > > Why are we making aux transactions when hpd isn't asserted? Can we only
> > > register the aux device once we know that state is "connected"? I'm
>
Quoting Doug Anderson (2022-03-18 09:24:17)
> Hi,
>
> On Thu, Mar 17, 2022 at 6:19 PM Stephen Boyd wrote:
> >
> > Quoting Sankeerth Billakanti (2022-03-16 10:35:51)
> > > The source device should ensure the sink is ready before
> > > proceeding to read the sink capability or performing
Hi,
On Thu, Mar 17, 2022 at 6:19 PM Stephen Boyd wrote:
>
> Quoting Sankeerth Billakanti (2022-03-16 10:35:51)
> > The source device should ensure the sink is ready before
> > proceeding to read the sink capability or performing any aux transactions.
> > The sink will indicate its
Quoting Sankeerth Billakanti (2022-03-16 10:35:51)
> The source device should ensure the sink is ready before
> proceeding to read the sink capability or performing any aux transactions.
> The sink will indicate its readiness by asserting the HPD line.
>
> The eDP sink requires
