Commit 0788abde authored by Matt Roper's avatar Matt Roper
Browse files

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: default avatarMatt Roper <matthew.d.roper@intel.com>
Reviewed-by: default avatarAnusha Srivatsa <anusha.srivatsa@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20210512042144.2089071-5-matthew.d.roper@intel.com
parent a6922f4a

drivers/gpu/drm/i915/display/intel_bw.c

+3 −0
Original line number Diff line number Diff line
@@ -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;

}