PSR is an eDP feature that allows power saving even with static image at eDP screen.
v2: Main differences in this v2: - Created vbt struct to get i915 dev_priv more organized and to avoid adding more stuff into it. - migrated hsw macros to use transcoder instead of pipes than I could address eDP - remove patch that was only adding edp psr registers and added them on demand
v1: Shobit Kumar has implemented this patch series some time ago, but had no eDP panel with PSR capability to test them.
I could test and verify that this series fully identify PSR capability and enables it at HSW. I also verified that it saves from 0.5-1W but only when in blank screen. It seems it is not really entering in sleeping mode with static image at eDP screen yet.
Please accept this series as the first part of PSR enabling while we continue working to improve its functionality.
Rodrigo Vivi (3): drm/i915: Organize VBT stuff inside drm_i915_private drm/i915: Use cpu_transcoder for HSW_TVIDEO_DIP_* instead of pipe drm/i915: Hook PSR functionality
Shobhit Kumar (6): drm/i915: Added SDP and VSC structures for handling PSR for eDP drm/i915: Read the EDP DPCD and PSR Capability drm/i915: Setup EDP PSR AUX Registers drm/i915: VBT Parsing for the PSR Feature Block for HSW drm/i915: Enable/Disable PSR on HSW drm/i915: Added debugfs support for PSR Status
drivers/gpu/drm/i915/i915_debugfs.c | 34 +++++ drivers/gpu/drm/i915/i915_dma.c | 8 +- drivers/gpu/drm/i915/i915_drv.h | 63 +++++--- drivers/gpu/drm/i915/i915_reg.h | 53 ++++++- drivers/gpu/drm/i915/intel_bios.c | 126 ++++++++++------ drivers/gpu/drm/i915/intel_bios.h | 20 ++- drivers/gpu/drm/i915/intel_crt.c | 4 +- drivers/gpu/drm/i915/intel_ddi.c | 8 +- drivers/gpu/drm/i915/intel_display.c | 16 +- drivers/gpu/drm/i915/intel_dp.c | 285 +++++++++++++++++++++++++++++++---- drivers/gpu/drm/i915/intel_drv.h | 5 + drivers/gpu/drm/i915/intel_hdmi.c | 12 +- drivers/gpu/drm/i915/intel_lvds.c | 20 +-- drivers/gpu/drm/i915/intel_sdvo.c | 6 +- drivers/gpu/drm/i915/intel_tv.c | 8 +- include/drm/drm_dp_helper.h | 29 ++++ 16 files changed, 551 insertions(+), 146 deletions(-)