CMRR is a display feature that uses adaptive sync framework to vary Vtotal slightly to match the content rate exactly without frame drops. This feature is a variation of VRR where it varies Vtotal slightly (between additional 0 and 1 Vtotal scanlines) to match content rate exactly without frame drops using the adaptive sync framework. enable this feature by programing new registers for CMRR enable, CMRR_M, CMRR_N, vmin=vmax=flipline.The CMRR_M/CMRR_N ratio represents the fractional part in (actual refresh rate/target refresh rate) * origVTotal. --v6: - CMRR handling in co-existatnce of LRR and DRRS - Correct vtotal paramas accuracy and add 2 digit precision. --v7: - Rebased patches in-accordance to AS SDP merge. - Add neccessary gaurd to prevent crtc_state mismatch during intel_vrr_get_config. -v8: - Add support for AS SDP for CMRR. - update palce holder for CMRR register(Jani). - Make CMRR as subset of FAVT, as per comments in patch#3. -v9: - Add CMRR register definitions to separate intel_vrr_reg.h. - Remove cmrr_enabling/disabling, use vrr.enable instead. - Update AS SDP pack function to accomodate target_rr_divider. - Remove duplicated lines to compute vrr_vsync params. - Set cmrr.enable with a separate patch at last. Mitul Golani (8): drm/i915: Define and compute Transcoder CMRR registers drm/i915: Update trans_vrr_ctl flag when cmrr is computed drm/i915: Compute CMRR and calculate vtotal Add refresh rate divider to struct representing AS SDP drm/i915/display: Add support for pack and unpack drm/i915/display: Compute Adaptive sync SDP params drm/i915/display: Compute vrr vsync params drm/i915/display: Compute cmrr.enable flag drivers/gpu/drm/i915/display/intel_display.c | 24 ++- .../drm/i915/display/intel_display_device.h | 1 + .../drm/i915/display/intel_display_types.h | 6 + drivers/gpu/drm/i915/display/intel_dp.c | 21 ++- drivers/gpu/drm/i915/display/intel_vrr.c | 139 +++++++++++++++--- drivers/gpu/drm/i915/intel_vrr_reg.h | 21 +++ include/drm/display/drm_dp_helper.h | 1 + 7 files changed, 191 insertions(+), 22 deletions(-) create mode 100644 drivers/gpu/drm/i915/intel_vrr_reg.h -- 2.25.1
