On Wed, 2018-08-08 at 22:55 -0700, Rodrigo Vivi wrote:
> On Tue, Jul 31, 2018 at 02:07:09PM -0700, Manasi Navare wrote:
> > If a eDP panel supports both PSR2 and VDSC, our HW cannot
> > support both at a time. Give priority to PSR2 if a requested
> > resolution can be supported without compression else enable
> > VDSC and keep PSR2 disabled.
>
> what about PSR1 on PSR2 panels? could it be enabled with VSC?
> or is there any restriction?
>
> >
> > Cc: Rodrigo Vivi <rodrigo.vivi@xxxxxxxxx>
> > Cc: Jani Nikula <jani.nikula@xxxxxxxxx>
> > Cc: Ville Syrjälä <ville.syrjala@xxxxxxxxxxxxxxx>
> > Signed-off-by: Manasi Navare <manasi.d.navare@xxxxxxxxx>
> > ---
> > drivers/gpu/drm/i915/intel_psr.c | 10 ++++++++++
> > 1 file changed, 10 insertions(+)
> >
> > diff --git a/drivers/gpu/drm/i915/intel_psr.c
> > b/drivers/gpu/drm/i915/intel_psr.c
> > index 4bd5768..fdb028f 100644
> > --- a/drivers/gpu/drm/i915/intel_psr.c
> > +++ b/drivers/gpu/drm/i915/intel_psr.c
> > @@ -441,6 +441,16 @@ static bool intel_psr2_config_valid(struct
> > intel_dp *intel_dp,
> > if (!dev_priv->psr.sink_psr2_support)
> > return false;
> >
> > + /*
> > + * DSC and PSR2 cannot be enabled simultaneously. If a
> > requested
> > + * resolution requires DSC to be enabled, priority is
> > given to DSC
> > + * over PSR2.
> > + */
> > + if (crtc_state->dsc_params.compression_enable) {
> > + DRM_DEBUG_KMS("PSR2 cannot be enabled since DSC is
> > enabled\n");
> > + return false;
> > + }
>
> one concern I had when I first saw this patch is the order, but
> I saw that psr compute config is the last one inside dp compute
> config,
Do something more to ensure that order stays as it is? A warn if both
get enabled, or a comment in intel_dp.c perhaps. That is what we do for
drrs and psr.
> so we are good...
>
> only "concern" now is about PSR1 restrictions.
>
> But if not restriction with PSR1 and VSC:
>
> Reviewed-by: Rodrigo Vivi <rodrigo.vivi@xxxxxxxxx>
>
>
> > +
> > if (INTEL_GEN(dev_priv) >= 10 || IS_GEMINILAKE(dev_priv))
> > {
> > psr_max_h = 4096;
> > psr_max_v = 2304;
> > --
> > 2.7.4
> >
> > _______________________________________________
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> > Intel-gfx@xxxxxxxxxxxxxxxxxxxxx
> > https://lists.freedesktop.org/mailman/listinfo/intel-gfx
>
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