> -----Original Message----- > From: Intel-gfx <[email protected]> On Behalf Of Imre > Deak > Sent: Thursday, February 19, 2026 11:58 PM > To: [email protected]; [email protected] > Subject: [PATCH 1/5] drm/i915/dp_tunnel: Don't update tunnel state during > system resume > > During system resume, restoring the pre-suspend display state must not fail. > This requires preserving the sink capabilities from before suspend, including > the > available link bandwidth. > I don't see the sink capabilities being stored in this patch.
> If these capabilities are not preserved, the restore modeset may fail, either > due > to a missing sink capability or insufficient link bandwidth for the restored > mode. Don't see this in the patch. > > When the sink is connected through a DP tunnel, prevent such capability > changes by skipping tunnel state updates during resume. This also avoids > updating the sink state via the tunnel while it is being resumed. > > Signed-off-by: Imre Deak <[email protected]> > --- > drivers/gpu/drm/i915/display/intel_dp_tunnel.c | 11 ++++++----- > 1 file changed, 6 insertions(+), 5 deletions(-) > > diff --git a/drivers/gpu/drm/i915/display/intel_dp_tunnel.c > b/drivers/gpu/drm/i915/display/intel_dp_tunnel.c > index faa2b7a46699d..eb1eed1c8c7bb 100644 > --- a/drivers/gpu/drm/i915/display/intel_dp_tunnel.c > +++ b/drivers/gpu/drm/i915/display/intel_dp_tunnel.c > @@ -150,11 +150,9 @@ static int allocate_initial_tunnel_bw_for_pipes(struct > intel_dp *intel_dp, u8 pi > drm_dp_tunnel_name(intel_dp->tunnel), > encoder->base.base.id, encoder->base.name, > ERR_PTR(err)); > - > - return err; > } > > - return update_tunnel_state(intel_dp); > + return err; > } > > static int allocate_initial_tunnel_bw(struct intel_dp *intel_dp, @@ -200,10 > +198,13 @@ static int detect_new_tunnel(struct intel_dp *intel_dp, struct > drm_modeset_acqui > } > > ret = allocate_initial_tunnel_bw(intel_dp, ctx); > - if (ret < 0) > + if (ret < 0) { > intel_dp_tunnel_destroy(intel_dp); > > - return ret; > + return ret; > + } > + > + return update_tunnel_state(intel_dp); > } > > /** > -- > 2.49.1 Thanks and Regards, Arun R Murthy --------------------
