[PATCH v2 0/1] drm/xe: Set GT rp min frequency as 1.2GHz default for BMG/CRI

[Nareshkumar Gollakoti <naresh.kumar.g@intel.com>]

Performance degradation occurs in multi-BMG GPU configurations 
during Peer-to-Peer transactions when one of the two GPUs remains idle
with no engine activity.
The root cause has been identified as frequency downscaling:
the idle remote GPU reduces its operating frequency to the minimum 400MHz,
which negatively impacts the bandwidth available for P2P transactions 
initiated by the active local GPU.

To address above problem this patch ensures for the platform BMG/CRI
the default GT rp frquency min set as 1.2GHz to ensure effetive P2P
transaction bandwidth.

Note: 
While frequency boosting improves performance, 
it also increases power consumption. In single GPU mode,
it causes the GPU to operate at unnecessarily high frequencies by default
and as of now we do not have any mechanism to limit this for single
GPU.

v2:
- Fix Indentation(Thomas)
- Add comment about power impact(Stuart)

Nareshkumar Gollakoti (1):
  drm/xe: Set GT rp min frequency as 1.2GHz default for BMG/CRI

 drivers/gpu/drm/xe/xe_guc_pc.c | 13 ++++++++++++-
 1 file changed, 12 insertions(+), 1 deletion(-)

-- 
2.43.0