HDR functionality in weston 12

Namit Solanki (QUIC) quic_nsolanki at quicinc.com
Tue Jun 20 14:04:14 UTC 2023


I have certain questions for HDR functionality in Weston 12, please help me

  1.  Drm-backend can read 3D LUT and 1d LUT for each plane?
  2.  HDR meta data is read from wayland app and is being sent to display driver as connector property?
  3.  If planes are capable for tonemapping, tonemapping from planes are supported?
  4.  I think below code is dead code, please correct me if I am wrong, please let me know the reason for same (in backend-drm, file kms.c function drm_output_apply_state_atomic())

                        if (!output->deprecated_gamma_is_set) {

                                    ret |= crtc_add_prop_zero_ok(req, crtc,

                                                                             WDRM_CRTC_GAMMA_LUT, 0);

                                    ret |= crtc_add_prop_zero_ok(req, crtc,

                                                                             WDRM_CRTC_DEGAMMA_LUT, 0);


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