[Intel-gfx] [PATCH v6 0/5] Consider DBuf bandwidth when calculating CDCLK

Stanislav Lisovskiy stanislav.lisovskiy at intel.com
Tue May 5 14:28:11 UTC 2020

We need to calculate cdclk after watermarks/ddb has been calculated
as with recent hw CDCLK needs to be adjusted accordingly to DBuf
requirements, which is not possible with current code organization.

Setting CDCLK according to DBuf BW requirements and not just rejecting
if it doesn't satisfy BW requirements, will allow us to save power when
it is possible and gain additional bandwidth when it's needed - i.e
boosting both our power management and perfomance capabilities.

This patch is preparation for that, first we now extract modeset
calculation from modeset checks, in order to call it after wm/ddb
has been calculated.

Stanislav Lisovskiy (5):
  drm/i915: Decouple cdclk calculation from modeset checks
  drm/i915: Force recalculate min_cdclk if planes config changed
  drm/i915: Introduce for_each_dbuf_slice_in_mask macro
  drm/i915: Adjust CDCLK accordingly to our DBuf bw needs
  drm/i915: Remove unneeded hack now for CDCLK

 drivers/gpu/drm/i915/display/intel_bw.c       | 73 ++++++++++++++++++-
 drivers/gpu/drm/i915/display/intel_bw.h       |  7 ++
 drivers/gpu/drm/i915/display/intel_cdclk.c    | 56 +++++++++++---
 drivers/gpu/drm/i915/display/intel_cdclk.h    |  3 +-
 drivers/gpu/drm/i915/display/intel_display.c  | 40 +++++++---
 drivers/gpu/drm/i915/display/intel_display.h  |  7 ++
 .../drm/i915/display/intel_display_power.h    |  1 +
 drivers/gpu/drm/i915/intel_pm.c               | 31 +++++++-
 drivers/gpu/drm/i915/intel_pm.h               |  3 +
 9 files changed, 194 insertions(+), 27 deletions(-)


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