Modern hardwares have multi segmented lut approach to prioritize the darker regions of the spectrum. This series introduces a new UAPI to define the lut ranges supported by the respective hardware. This also enables Pipe Color Management Support for Intel's XE_LPD hw. Enable Support for Pipe Degamma with the increased lut samples supported by hardware. This also adds support for newly introduced Logarithmic Gamma for XE_LPD. Also added the gamma readout support. The Logarithmic gamma implementation on XE_LPD is non linear and adds 25 segments with non linear lut samples in each segment. The expectation is userspace will create the luts as per this distribution and pass the final samples to driver to be programmed in hardware. +-----+------------------------------+ | x | 2 pow x segment|No of Entries | | 0 | 1 | | 0 | 1 | 1 | | 1 | 2 | 2 | | 2 | 4 | 2 | | 3 | 8 | 2 | | 4 | 16 | 2 | | 5 | 32 | 4 | | 6 | 64 | 4 | | 7 | 128 | 4 | | 8 | 256 | 8 | | 9 | 512 | 8 | | 10 | 1024 | 8 | | 11 | 2048 | 16 | | 12 | 4096 | 16 | | 13 | 8192 | 16 | | 14 | 16384 | 32 | | 15 | 32768 | 32 | | 16 | 65536 | 64 | | 17 | 131072 | 64 | | 18 | 262144 | 64 | | 19 | 524288 | 32 | | 20 | 1048576 | 32 | | 21 | 2097152 | 32 | | 22 | 4194304 | 32 | | 23 | 8388608 | 32 | | 24 | 16777216 | 1 | | | Total Entries | 511 | -----+-----------------+------------+ Credits: Special mention and credits to Ville Syrjala for coming up with a design for this feature and inputs. This series is based on his original design. Note: Userspace support for this new UAPI will be done on Chrome and plan is to get this supported on mutter as well. We will notify the list once we have that ready for review. Uma Shankar (9): drm: Add gamma mode property drm/i915/xelpd: Define color lut range structure drm/i915/xelpd: Add support for Logarithmic gamma mode drm/i915/xelpd: Attach gamma mode property drm: Add Client Cap for advance gamma mode drm/i915/xelpd: logarithmic gamma enabled only with advance gamma mode drm/i915/xelpd: Enable Pipe Degamma drm/i915/xelpd: Add Pipe Color Lut caps to platform config drm/i915/xelpd: Enable XE_LPD Gamma Lut readout drivers/gpu/drm/drm_atomic_uapi.c | 8 + drivers/gpu/drm/drm_color_mgmt.c | 75 ++++ drivers/gpu/drm/drm_ioctl.c | 5 + drivers/gpu/drm/i915/display/intel_color.c | 454 ++++++++++++++++++++- drivers/gpu/drm/i915/i915_pci.c | 3 +- drivers/gpu/drm/i915/i915_reg.h | 7 + include/drm/drm_atomic.h | 1 + include/drm/drm_color_mgmt.h | 8 + include/drm/drm_crtc.h | 25 ++ include/drm/drm_file.h | 8 + include/uapi/drm/drm.h | 8 + include/uapi/drm/drm_mode.h | 43 ++ 12 files changed, 630 insertions(+), 15 deletions(-) -- 2.26.2 _______________________________________________ Intel-gfx mailing list Intel-gfx@xxxxxxxxxxxxxxxxxxxxx https://lists.freedesktop.org/mailman/listinfo/intel-gfx
