On Thu, Sep 14, 2023 at 10:26:51PM +0300, Imre Deak wrote: > On 8b/10b MST links the PBN value for DSC streams must be calculated > accounting for the FEC overhead. The same applies to 8b/10b non-DSC > streams if there is another DSC stream on the same link. Fix up the PBN > calculation accordingly. > > Signed-off-by: Imre Deak <imre.deak@xxxxxxxxx> Reviewed-by: Stanislav Lisovskiy <stanislav.lisovskiy@xxxxxxxxx> > --- > drivers/gpu/drm/i915/display/intel_dp_mst.c | 3 ++- > 1 file changed, 2 insertions(+), 1 deletion(-) > > diff --git a/drivers/gpu/drm/i915/display/intel_dp_mst.c b/drivers/gpu/drm/i915/display/intel_dp_mst.c > index 01291bbb44693..c1fea894d3774 100644 > --- a/drivers/gpu/drm/i915/display/intel_dp_mst.c > +++ b/drivers/gpu/drm/i915/display/intel_dp_mst.c > @@ -110,7 +110,8 @@ static int intel_dp_mst_find_vcpi_slots_for_bpp(struct intel_encoder *encoder, > > crtc_state->pbn = drm_dp_calc_pbn_mode(adjusted_mode->crtc_clock, > bpp << 4, > - false); > + (dsc || crtc_state->fec_enable) && > + !intel_dp_is_uhbr(crtc_state)); > > slots = drm_dp_atomic_find_time_slots(state, &intel_dp->mst_mgr, > connector->port, > -- > 2.37.2 >
