Content Adaptive Sharpness Filter (CASF)

Starting from LNL the display engine supports an adaptive sharpening filter, enhancing the image quality. The display hardware utilizes the second pipe scaler for implementing CASF. If sharpness is being enabled then pipe scaling cannot be used. This filter operates on a region of pixels based on the tap size. Coefficients are used to generate an alpha value which blends the sharpened image to original image.