[Intel-gfx] [PATCH 0/4] drm/i915: Optimize CSC updates for ilk+

Ville Syrjala ville.syrjala at linux.intel.com
Thu Feb 24 16:50:59 UTC 2022

From: Ville Syrjälä <ville.syrjala at linux.intel.com>

As we did with plane updates we can split the color management
updates to noarm+arm pair. The CSC matrix coefficients can all
be written in the noarm hook, with just the PIPE_CSC_mode (the
arming register) left behind in the arm hook.

Also make the scaler/pfit completely lockless as that too
adds overhead into the vblank evasion critical section.

Ville Syrjälä (4):
  drm/i915: Remove locks around skl+ scaler programming
  drm/i915: Make ilk+ pfit regiser unlocked
  drm/i915: Split color_commit() into noarm+arm pair
  drm/i915: Split pipe+output CSC programming to noarm+arm pair

 drivers/gpu/drm/i915/display/intel_color.c   | 95 +++++++++++++-------
 drivers/gpu/drm/i915/display/intel_color.h   |  3 +-
 drivers/gpu/drm/i915/display/intel_display.c | 40 +++++----
 drivers/gpu/drm/i915/display/skl_scaler.c    | 10 ---
 4 files changed, 88 insertions(+), 60 deletions(-)


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