On Thu, Mar 10, 2022 at 01:43:57AM +0200, Ville Syrjälä wrote:
> On Thu, Mar 03, 2022 at 03:32:22PM -0800, Manasi Navare wrote:
> > With some VRR panels, user can turn VRR ON/OFF on the fly from the panel
> > settings.
> > When VRR is turned OFF ,sends a long HPD to the driver clearing the Ignore
> > MSA bit
> > in the DPCD. Currently the driver parses that onevery HPD but fails to reset
> > the corresponding VRR Capable Connector property.
> > Hence the userspace still sees this as VRR Capable panel which is incorrect.
> >
> > Fix this by explicitly resetting the connector property.
> >
> > v2: Reset vrr capable if status == connector_disconnected
> > v3: Use i915 and use bool vrr_capable (Jani Nikula)
> > v4: Move vrr_capable to after update modes call (Jani N)
> > Remove the redundant comment (Jan N)
> > v5: Fixes the regression on older platforms by reseting the VRR
> > only if HAS_VRR
> > v6: Remove the checks from driver, add in drm core before
> > setting VRR prop (Ville)
> > v7: Move VRR set/reset to set/unset_edid (Ville)
> >
> > Cc: Jani Nikula <jani.nik...@intel.com>
> > Cc: Ville Syrjälä <ville.syrj...@linux.intel.com>
> > Fixes: 390a1f8beb87 ("Revert "drm/i915/display/vrr: Reset VRR capable
> > property on a long hpd")
> > Signed-off-by: Manasi Navare <manasi.d.nav...@intel.com>
>
> Looks reasoanble enough to me.
> Reviewed-by: Ville Syrjälä <ville.syrj...@linux.intel.com>
>
> But be careful when pushing this since I don't think
> the drm_connector_set_vrr_capable_property() change has
> percolated into drm-intel-next yet.
Okay I can wait then to push until that gets percolated from drm-misc
Manasi
>
> > ---
> > drivers/gpu/drm/i915/display/intel_dp.c | 17 +++++++++++------
> > 1 file changed, 11 insertions(+), 6 deletions(-)
> >
> > diff --git a/drivers/gpu/drm/i915/display/intel_dp.c
> > b/drivers/gpu/drm/i915/display/intel_dp.c
> > index d6ef33096bb6..1d0f8fc39005 100644
> > --- a/drivers/gpu/drm/i915/display/intel_dp.c
> > +++ b/drivers/gpu/drm/i915/display/intel_dp.c
> > @@ -4385,13 +4385,20 @@ intel_dp_update_420(struct intel_dp *intel_dp)
> > static void
> > intel_dp_set_edid(struct intel_dp *intel_dp)
> > {
> > + struct drm_i915_private *i915 = dp_to_i915(intel_dp);
> > struct intel_connector *connector = intel_dp->attached_connector;
> > struct edid *edid;
> > + bool vrr_capable;
> >
> > intel_dp_unset_edid(intel_dp);
> > edid = intel_dp_get_edid(intel_dp);
> > connector->detect_edid = edid;
> >
> > + vrr_capable = intel_vrr_is_capable(&connector->base);
> > + drm_dbg_kms(&i915->drm, "[CONNECTOR:%d:%s] VRR capable: %s\n",
> > + connector->base.base.id, connector->base.name,
> > str_yes_no(vrr_capable));
> > + drm_connector_set_vrr_capable_property(&connector->base, vrr_capable);
> > +
> > intel_dp_update_dfp(intel_dp, edid);
> > intel_dp_update_420(intel_dp);
> >
> > @@ -4424,6 +4431,9 @@ intel_dp_unset_edid(struct intel_dp *intel_dp)
> >
> > intel_dp->dfp.ycbcr_444_to_420 = false;
> > connector->base.ycbcr_420_allowed = false;
> > +
> > + drm_connector_set_vrr_capable_property(&connector->base,
> > + false);
> > }
> >
> > static int
> > @@ -4574,14 +4584,9 @@ static int intel_dp_get_modes(struct drm_connector
> > *connector)
> > int num_modes = 0;
> >
> > edid = intel_connector->detect_edid;
> > - if (edid) {
> > + if (edid)
> > num_modes = intel_connector_update_modes(connector, edid);
> >
> > - if (intel_vrr_is_capable(connector))
> > - drm_connector_set_vrr_capable_property(connector,
> > - true);
> > - }
> > -
> > /* Also add fixed mode, which may or may not be present in EDID */
> > if (intel_dp_is_edp(intel_attached_dp(intel_connector)) &&
> > intel_connector->panel.fixed_mode) {
> > --
> > 2.19.1
>
> --
> Ville Syrjälä
> Intel
