On 2020-10-27 at 11:02:26 +0530, Shankar, Uma wrote:
>
>
> > -----Original Message-----
> > From: Anshuman Gupta <anshuman.gupta@xxxxxxxxx>
> > Sent: Friday, October 23, 2020 5:51 PM
> > To: intel-gfx@xxxxxxxxxxxxxxxxxxxxx; dri-devel@xxxxxxxxxxxxxxxxxxxxx
> > Cc: seanpaul@xxxxxxxxxxxx; Nikula, Jani <jani.nikula@xxxxxxxxx>; C,
> > Ramalingam <ramalingam.c@xxxxxxxxx>; Li, Juston <juston.li@xxxxxxxxx>;
> > Shankar, Uma <uma.shankar@xxxxxxxxx>; Gupta, Anshuman
> > <anshuman.gupta@xxxxxxxxx>
> > Subject: [PATCH v3 01/16] drm/i915/hdcp: Update CP property in update_pipe
> >
> > When crtc state need_modeset is true it is not necessary it is going to be a real
> > modeset, it can turns to be a update_pipe instead of modeset.
>
> I believe you refer fastest here. May be make this a bit clear.
>
> > This turns content protection property to be DESIRED and hdcp update_pipe left
> > with property to be in DESIRED state but actually hdcp->value was ENABLED.
> > This caught with DP MST setup, when disabling HDCP on a connector sets the crtc
> > state need_modeset to true for all crtc driving the other DP-MST topology
> > connectors.
>
> This is a bit ambiguous, you can mention it a bit more clearly. In case of DP MST, how this
> affects would help make it clearer.
>
> >
> > v2:
> > Fix WARN_ON(connector->base.registration_state ==
> > DRM_CONNECTOR_REGISTERED)
> >
> > Fixes: 33f9a623bfc6 ("drm/i915/hdcp: Update CP as per the kernel internal
> > state")
> > Cc: Ramalingam C <ramalingam.c@xxxxxxxxx>
> > Signed-off-by: Anshuman Gupta <anshuman.gupta@xxxxxxxxx>
> > ---
> > drivers/gpu/drm/i915/display/intel_hdcp.c | 5 +++++
> > 1 file changed, 5 insertions(+)
> >
> > diff --git a/drivers/gpu/drm/i915/display/intel_hdcp.c
> > b/drivers/gpu/drm/i915/display/intel_hdcp.c
> > index b2a4bbcfdcd2..0d9e8d3b5603 100644
> > --- a/drivers/gpu/drm/i915/display/intel_hdcp.c
> > +++ b/drivers/gpu/drm/i915/display/intel_hdcp.c
> > @@ -2221,6 +2221,11 @@ void intel_hdcp_update_pipe(struct
> > intel_atomic_state *state,
> > desired_and_not_enabled =
> > hdcp->value !=
> > DRM_MODE_CONTENT_PROTECTION_ENABLED;
> > mutex_unlock(&hdcp->mutex);
> >
>
> Please add a comment explaining the rationale here as well.
Sure i will fix all above comment.
>
> > + if (!desired_and_not_enabled &&
> > !content_protection_type_changed) {
> > + drm_connector_get(&connector->base);
>
> Where are we releasing this ref.
prop worker function releases the connector reference.
Thanks,
Anshuman Gupta.
>
> > + schedule_work(&hdcp->prop_work);
> > + }
> > }
> >
> > if (desired_and_not_enabled || content_protection_type_changed)
> > --
> > 2.26.2
>
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