[v12,0/9] Implement CMRR Support

Message

Golani, Mitulkumar Ajitkumar June 5, 2024, 12:27 p.m. UTC

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.

-v10:
- Separate VRR related register definitions.
- Add dependency header intel_display_reg_defs.h.
- Rename file name to intel_vrr_regs.h instead of reg.h.
- Revert removed line.
- Since vrr.enable and cmrr.enable are not mutually exclusive,
handle accordingly.
- is_edp is not required inside is_cmrr_frac_required function.
- Add video_mode_required flag for future enhancement.
- Correct cmrr_m/cmrr_n calculation.
- target_rr_divider is bools so handle accordingly.

-v11:
- Move VRR related register and bits to separate file
intel_vrr_regs.h.
- Correct file header macro to intel_vrr_regs.h.
- Remove adding CMRR flag to vrr_ctl register during
set_transcoder_timing.
- Replace vrr.enable flag to cmrr.enable where added mistakenly.
- Move cmrr computation patch to last and set other other required
  params before computing cmrr.enable.

-v12:
- Add patch to fix check patch issues for VRR related registers
in i915_reg.h then move them to intel_vrr_regs.h with separate
patch.
- Use drm_mode_vrefresh instead of manual refresh rate calculation.

Mitul Golani (7):
  gpu/drm/i915: Update indentation for VRR registers and bits
  drm/i915: Separate VRR related register definitions
  drm/i915: Define and compute Transcoder CMRR registers
  drm/i915: Update trans_vrr_ctl flag when cmrr is computed
  drm/dp: 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

Ville Syrjälä (2):
  drm/i915: Protect CRC reg macro arguments for consistency
  drm-tip: 2024y-06m-05d-09h-52m-50s UTC integration manifest