2998bccfa4
[Why] Enable sharpener support for DCN401 [How] - Removed memcmp check that was preventing ISHARP from being enabled. - Add missing ISHARP register defines, masks, and writes. - Add programming of Blur and Scale coefficients. - Program FMT_MODE and NLDELTA registers based on LLS_PREF and pixel - format - Only enable ISHARP for YUV420 - Add disabling of ISHARP - Add debug flags and registry keys for debugging ISHARP. - Set default to medium level Acked-by: Rodrigo Siqueira <Rodrigo.Siqueira@amd.com> Signed-off-by: Samson Tam <Samson.Tam@amd.com> Acked-by: Harry Wentland <harry.wentland@amd.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com>