SPRUIV7B May 2022 – September 2023 AM620-Q1 , AM623 , AM625 , AM625-Q1 , AM625SIP
The video pipeline supports a look up table to perform either of the following operations:
The look-up table consists of 3 separate 256 x 8-bit memories and is indexed either by the source BITMAP data or by R/G/B component data. The table is loaded through direct register access by writing to the CLUT registers.
The sequence to load the table is:
SW needs to ensure that there is no visible effect when modifying the table, since it is not under hardware control.
The usage of the look-up table in CLUT mode is activated when a BITMAP format is selected in the DSS0_VID_ATTRIBUTES[6:1] FORMAT register bit-field.
The usage of the look-up table for RGB inverse gamma correction can be enabled by setting DSS0_VID_ATTRIBUTES[30] GAMMAINVERSION register bit.
Scaling and color look-up table features are mutually exclusive. If color look-up feature is enabled, then video pipeline scaler has to be disabled.