On Mon, 2018-12-03 at 14:45 -0800, Dhinakaran Pandiyan wrote:
> On Mon, 2018-12-03 at 12:14 -0800, Souza, Jose wrote:
> > On Fri, 2018-11-30 at 15:35 -0800, Dhinakaran Pandiyan wrote:
> > > On Thu, 2018-11-29 at 18:25 -0800, José Roberto de Souza wrote:
> > > > i915 yet don't support PSR in Apple panels, so lets keep it
> > > > disabled
> > > > while we work on that.
> > > >
> > > > v2: Renamed DP_DPCD_QUIRK_PSR_NOT_CURRENTLY_SUPPORTED to
> > > > DP_DPCD_QUIRK_NO_PSR (Ville)
> > > >
> > > > Fixes: 598c6cfe0690 (drm/i915/psr: Enable PSR1 on gen-9+ HW)
> > > > Cc: Ville Syrjälä <ville.syrjala@xxxxxxxxxxxxxxx>
> > > > Cc: Rodrigo Vivi <rodrigo.vivi@xxxxxxxxx>
> > > > Cc: Dhinakaran Pandiyan <dhinakaran.pandiyan@xxxxxxxxx>
> > > > Signed-off-by: José Roberto de Souza <jose.souza@xxxxxxxxx>
> > > > ---
> > > > drivers/gpu/drm/drm_dp_helper.c | 2 ++
> > > > drivers/gpu/drm/i915/intel_psr.c | 6 ++++++
> > > > include/drm/drm_dp_helper.h | 1 +
> > > > 3 files changed, 9 insertions(+)
> > > >
> > > > diff --git a/drivers/gpu/drm/drm_dp_helper.c
> > > > b/drivers/gpu/drm/drm_dp_helper.c
> > > > index 2d6c491a0542..b00fd5ced0a0 100644
> > > > --- a/drivers/gpu/drm/drm_dp_helper.c
> > > > +++ b/drivers/gpu/drm/drm_dp_helper.c
> > > > @@ -1273,6 +1273,8 @@ static const struct dpcd_quirk
> > > > dpcd_quirk_list[] = {
> > > > { OUI(0x00, 0x22, 0xb9), DEVICE_ID_ANY, true,
> > > > BIT(DP_DPCD_QUIRK_CONSTANT_N) },
> > > > /* LG LP140WF6-SPM1 eDP panel */
> > > > { OUI(0x00, 0x22, 0xb9), DEVICE_ID('s', 'i', 'v', 'a',
> > > > 'r',
> > > > 'T'), false, BIT(DP_DPCD_QUIRK_CONSTANT_N) },
> > > > + /* Apple panels needs some additional handling to
> > > > support PSR
> > > > */
> > > > + { OUI(0x00, 0x10, 0xfa), DEVICE_ID_ANY, false,
> > > > BIT(DP_DPCD_QUIRK_NO_PSR) }
> > > > };
> > > >
> > > > #undef OUI
> > > > diff --git a/drivers/gpu/drm/i915/intel_psr.c
> > > > b/drivers/gpu/drm/i915/intel_psr.c
> > > > index 2084784f320d..40ca6cc43cc4 100644
> > > > --- a/drivers/gpu/drm/i915/intel_psr.c
> > > > +++ b/drivers/gpu/drm/i915/intel_psr.c
> > > > @@ -278,6 +278,12 @@ void intel_psr_init_dpcd(struct intel_dp
> > > > *intel_dp)
> > > > DRM_DEBUG_KMS("Panel lacks power state control,
> > > > PSR
> > > > cannot be enabled\n");
> > > > return;
> > > > }
> > > > +
> > > > + if (drm_dp_has_quirk(&intel_dp->desc,
> > > > DP_DPCD_QUIRK_NO_PSR)) {
> > > > + DRM_DEBUG_KMS("PSR support not currently
> > > > available for
> > > > this panel\n");
> > > > + return;
> > > > + }
> > > > +
> > > > dev_priv->psr.sink_support = true;
> > > > dev_priv->psr.sink_sync_latency =
> > > > intel_dp_get_sink_sync_latency(intel_dp);
> > > > diff --git a/include/drm/drm_dp_helper.h
> > > > b/include/drm/drm_dp_helper.h
> > > > index 5736c942c85b..047314ce25d6 100644
> > > > --- a/include/drm/drm_dp_helper.h
> > > > +++ b/include/drm/drm_dp_helper.h
> > > > @@ -1365,6 +1365,7 @@ enum drm_dp_quirk {
> > > > * to 16 bits. So will give a constant value (0x8000)
> > > > for
> > > > compatability.
> > > > */
> > > > DP_DPCD_QUIRK_CONSTANT_N,
> > >
> > > nit: Documentation missing here. I guess we need something along
> > > the
> > > lines of "PSR not supported" without referring to the specific DP
> > > device. With that,
> > > Reviewed-by: Dhinakaran Pandiyan <dhinakaran.pandiyan@xxxxxxxxx>
> >
> > Adding here:
> >
> > /**
> > * @DP_DPCD_QUIRK_NO_PSR
> > *
> > * The device don't properly support PSR even if reports that
> nit: "device does not support"
Thanks
> > it
> > * supports or driver still need to implement proper handling
> ^needs
> > for such
> > * device.
> > */
> >
> > >
> > > > + DP_DPCD_QUIRK_NO_PSR,
> > > > };
> > > >
> > > > /**
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