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| author | Matt Roper <matthew.d.roper@intel.com> | 2021-05-11 21:21:41 -0700 |
|---|---|---|
| committer | Matt Roper <matthew.d.roper@intel.com> | 2021-05-12 16:56:49 -0700 |
| commit | 0788abdef6d1103c3a1d41ddd1fa536ca26479d6 (patch) | |
| tree | a997a5398ec7009abde4656f61215764372179b9 /drivers/gpu/drm/i915/display/intel_bw.c | |
| parent | a6922f4a01300efa0cccc0f337da4431dedf501c (diff) | |
| download | linux-0788abdef6d1103c3a1d41ddd1fa536ca26479d6.tar.gz linux-0788abdef6d1103c3a1d41ddd1fa536ca26479d6.tar.bz2 linux-0788abdef6d1103c3a1d41ddd1fa536ca26479d6.zip | |
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>
Link: https://patchwork.freedesktop.org/patch/msgid/20210512042144.2089071-5-matthew.d.roper@intel.com
Diffstat (limited to 'drivers/gpu/drm/i915/display/intel_bw.c')
| -rw-r--r-- | drivers/gpu/drm/i915/display/intel_bw.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/gpu/drm/i915/display/intel_bw.c b/drivers/gpu/drm/i915/display/intel_bw.c index 969169743630..a35435083b60 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; } |