[Intel-gfx] [PATCH 0/6] Enabling DRRS support in the kernel

[Vandana Kannan]

Dynamic Refresh Rate Switching (DRRS) is a power conservation feature which     
enables switching between low and high refresh rates based on the usage         
scenario. This feature is applicable for internal eDP panel. Indication that    
the panel can support DRRS is given by the panel EDID, which would list         
multiple refresh rates for one resolution.                                      
DRRS is of 2 types -                                                            
Static DRRS involves execution of the entire mode set sequence to switch        
between refresh rate.                                                           
seamless DRRS involves refresh rate switching during runtime without any        
blanking effect/mode set.                                                       
The vendor fills in a VBT field indicating static/seamless DRRS based on the    
panel spec. This information is needed to enable seamless DRRS in kernel.       
The patch series supports idleness detection in display i915 driver and switch  
to low refresh rate. It also provides set_property API for user space to         
request for different refresh rates for active use cases like video playback    
at 48/50 Hz.       


Pradeep Bhat (5):
  drm/i915: Adding VBT fields to support eDP DRRS feature
  drm/i915: Parse EDID probed modes for DRRS support
  drm/i915: Add support for DRRS set property to switch RR
  drm/i915: Support to read DMRRS field from VBT structure
  drm/i915: Adding support for DMRRS for media playback

Vandana Kannan (1):
  drm/i915: Idleness detection for DRRS

 drivers/gpu/drm/i915/i915_drv.h      |   30 ++++
 drivers/gpu/drm/i915/i915_reg.h      |    1 +
 drivers/gpu/drm/i915/intel_bios.c    |   25 +++
 drivers/gpu/drm/i915/intel_bios.h    |   31 ++++
 drivers/gpu/drm/i915/intel_display.c |   13 ++
 drivers/gpu/drm/i915/intel_dp.c      |  296 ++++++++++++++++++++++++++++++++++
 drivers/gpu/drm/i915/intel_drv.h     |   48 ++++++
 drivers/gpu/drm/i915/intel_pm.c      |  113 +++++++++++++
 drivers/gpu/drm/i915/intel_sprite.c  |    3 +
 9 files changed, 560 insertions(+)

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1.7.9.5