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drm_hwcomposer: Add support for color transform matrix

Roman Stratiienko requested to merge roman.stratiienko/drm-hwcomposer:add-ctm-support into main

Depends on !221 (merged)

  1. Add and wire-up CRTC CTM property support.
  2. Add custom Android property to select behavior for cases where DRM can't handle color transform matrix.

The "vendor.hwc.drm.ctm" property can be set to:

  • DRM_OR_GPU (default) - Use GPU if CTM is not supported by DRM.
  • DRM_OR_IGNORE - Ignore CTM if DRM doesn't support it.

The last option is useful for Android 13 and later where default color transformation matrix is not an identity matrix.

At the moment I do not have any devices with CTM support, therefore I can test only DRM_OR_IGNORE option.

Edited by Roman Stratiienko

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