[RFC 0/9] drm: rcar-du: cmm: Enable 3D LUT support

Jacopo Mondi jacopo.mondi at ideasonboard.com
Wed Jun 21 08:10:22 UTC 2023

Hello, this series is based on the RFC sent by Melssa Wen:
"[RFC PATCH v2 00/18] Add DRM CRTC 3D LUT interface"
that introduces CRTC properties to control 3D LUT operations.

The R-Car DU peripheral has a post-blending color management pipeline (CMM)
composed by (in order of processing) a 3D LUT a 1D LUT and a Color conversion

The CMM driver already supported operating the 1D LUT, this series add support
for the cubic LUT (named CLU).

I've been made aware by Melissa and Pekka that the focus of upstream for
color management properties is now on the definition of the "Plane color
pipeline" properties

Unfortunately the model there proposed doesn't match the R-Car DU hardware which
has color management at the post-blending level and not per plane (I've cc-ed
all the receivers of that series, just in case).

The user-space interface has been validated with dedicated unit tests for
the R-Car DU test suite (kms-test) which are available at:

The series validates the usage of the HW interface in the hope of re-starting
discussions and interests in the definition of CRTC color management


Alex Hung (1):
  drm: Add 3D LUT mode and its attributes

Jacopo Mondi (1):
  drm: rcar-du: crtc: Enable 3D LUT

Kieran Bingham (2):
  drm: rcar-du: cmm: Provide 3D-CLU support
  drm: rcar-du: kms: Configure the CLU

Laurent Pinchart (1):
  drm: rcar-du: cmm: Refactor LUT configuration

Melissa Wen (4):
  drm/drm_color_mgmt: add shaper LUT to color mgmt properties
  drm/drm_color_mgmt: add 3D LUT props to DRM color mgmt
  drm/drm_color_mgmt: add function to create 3D LUT modes supported
  drm/drm_color_mgmt: add function to attach 3D LUT props

 drivers/gpu/drm/drm_atomic_state_helper.c |   7 ++
 drivers/gpu/drm/drm_atomic_uapi.c         |  24 ++++
 drivers/gpu/drm/drm_color_mgmt.c          | 113 +++++++++++++++++++
 drivers/gpu/drm/drm_fb_helper.c           |   5 +
 drivers/gpu/drm/drm_mode_config.c         |  21 ++++
 drivers/gpu/drm/rcar-du/rcar_cmm.c        | 127 ++++++++++++++++------
 drivers/gpu/drm/rcar-du/rcar_cmm.h        |  36 +++++-
 drivers/gpu/drm/rcar-du/rcar_du_crtc.c    |  68 +++++++++---
 include/drm/drm_color_mgmt.h              |   7 ++
 include/drm/drm_crtc.h                    |  32 +++++-
 include/drm/drm_mode_config.h             |  25 +++++
 include/drm/drm_mode_object.h             |   2 +-
 include/uapi/drm/drm_mode.h               |  17 +++
 13 files changed, 428 insertions(+), 56 deletions(-)


More information about the wayland-devel mailing list