| Message ID | 20210311223632.3191939-17-matthew.d.roper@intel.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | Introduce Alder Lake-P | expand |
> -----Original Message----- > From: Intel-gfx <intel-gfx-bounces@lists.freedesktop.org> On Behalf Of Matt > Roper > Sent: Thursday, March 11, 2021 2:36 PM > To: intel-gfx@lists.freedesktop.org > Subject: [Intel-gfx] [PATCH 16/56] drm/i915/xelpd: Required bandwidth > increases when VT-d is active > > If VT-d is active, the memory bandwidth usage of the display is 5% higher. > Take this into account when determining whether we can support a display > configuration. > > Bspec: 64631 > Cc: Matt Atwood <matthew.s.atwood@intel.com> > Signed-off-by: Matt Roper <matthew.d.roper@intel.com> Reviewed-by: Anusha Srivatsa <anusha.srivatsa@intel.com> > --- > drivers/gpu/drm/i915/display/intel_bw.c | 3 +++ > 1 file changed, 3 insertions(+) > > diff --git a/drivers/gpu/drm/i915/display/intel_bw.c > b/drivers/gpu/drm/i915/display/intel_bw.c > index 20dbc3759d27..23cf9bf31e41 100644 > --- a/drivers/gpu/drm/i915/display/intel_bw.c > +++ b/drivers/gpu/drm/i915/display/intel_bw.c > @@ -344,6 +344,9 @@ static unsigned int intel_bw_data_rate(struct > drm_i915_private *dev_priv, > for_each_pipe(dev_priv, pipe) > data_rate += bw_state->data_rate[pipe]; > > + if (DISPLAY_VER(dev_priv) >= 13 && intel_vtd_active()) > + data_rate = data_rate * 105 / 100; > + > return data_rate; > } > > -- > 2.25.4 > > _______________________________________________ > Intel-gfx mailing list > Intel-gfx@lists.freedesktop.org > https://lists.freedesktop.org/mailman/listinfo/intel-gfx
diff --git a/drivers/gpu/drm/i915/display/intel_bw.c b/drivers/gpu/drm/i915/display/intel_bw.c index 20dbc3759d27..23cf9bf31e41 100644 --- a/drivers/gpu/drm/i915/display/intel_bw.c +++ b/drivers/gpu/drm/i915/display/intel_bw.c @@ -344,6 +344,9 @@ static unsigned int intel_bw_data_rate(struct drm_i915_private *dev_priv, for_each_pipe(dev_priv, pipe) data_rate += bw_state->data_rate[pipe]; + if (DISPLAY_VER(dev_priv) >= 13 && intel_vtd_active()) + data_rate = data_rate * 105 / 100; + return data_rate; }
If VT-d is active, the memory bandwidth usage of the display is 5% higher. Take this into account when determining whether we can support a display configuration. Bspec: 64631 Cc: Matt Atwood <matthew.s.atwood@intel.com> Signed-off-by: Matt Roper <matthew.d.roper@intel.com> --- drivers/gpu/drm/i915/display/intel_bw.c | 3 +++ 1 file changed, 3 insertions(+)