Back to index
Blob property to set the degamma lookup table (LUT) mapping pixel data from the framebuffer before it is given to the transformation matrix. The data is interpreted as an array of &struct drm_color_lut elements. Hardware might choose not to use the full precision of the LUT elements nor use all the elements of the LUT (for example the hardware might choose to interpolate between LUT and LUT). Setting this to NULL (blob property value set to 0) means a linear/pass-thru gamma table should be used. This is generally the driver boot-up state too. Drivers can access this blob through &drm_crtc_state.degamma_lut.