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(+) -- 1.7.9.5 _______________________________________________ Intel-gfx mailing list Intel-gfx@xxxxxxxxxxxxxxxxxxxxx http://lists.freedesktop.org/mailman/listinfo/intel-gfx
