Reprogramming of select registers in a linked list
View Patent ↗A system and method, for reprogramming registers without having to reprogram unchanged registers. The registers are divided into groups based on common characteristics or functions. The values for the groups that differ from the current values are written into a linked list, which is then loaded into the appropriate registers. The linked list contains information indicating the groups of registers in the linked list.
1. A method for decoding video data, said method comprising:
determining some of a plurality of groups of registers are to be reprogrammed during one point during the display period of a frame and a remainder of the groups of registers are not to be reprogrammed at any point during the display period of the frame; and
writing a linked list containing the values for each of the some of the plurality of groups of registers that are to be reprogrammed, wherein the values for the some of the plurality of groups of registers are continuous in said linked list;
wherein during the display period of the frame, both even lines and odd lines are displayed;
writing an indicator for each of the plurality of groups of registers, indicating whether each of the groups of registers are to be reprogrammed in a predetermined order; and
wherein the linked list is in an order related to the predetermined order.
2. The method of claim 1 , wherein the values in the linked list comprise varying amounts of data.
3. The method of claim 1 , further comprising:
allocating an amount of memory for the linked list;
determining another some of a plurality of groups of registers that are to be reprogrammed and another remainder of the groups of registers are not to be reprogrammed;
allocating another amount of memory; and
writing another linked list containing the values for each of the some of the plurality of groups of registers that are to be reprogrammed in the memory, wherein the values for the some of the plurality of groups of registers are continuous in said linked list.
4. A system for decoding video data, said system comprising:
a plurality of groups of registers;
a host processor;
a data memory; and
a program memory for storing a plurality of instructions, wherein execution of the plurality of instructions by the processor causes:
determining some of a plurality of groups of registers are to be reprogrammed during one point during the display period of a frame and a remainder of the groups of registers are not to be reprogrammed at any point during the display period of frame; and
writing a linked list containing the values for each of the some of the plurality of groups of registers that are to be reprogrammed, wherein the values for the some of the plurality of groups of registers are continuous in said linked list to the data memory; and
wherein the host processor is configured to execute the plurality of instructions after receiving a vertical synchronization pulse;
wherein during the display period of the frame, both even lines and odd lines are displayed;
writing an indicator for each of the plurality of groups of registers, indicating whether each of the groups of registers are to be reprogrammed in a predetermined order to the data memory; and
wherein the linked list is in an order related to the predetermined order.
5. The system of claim 4 , wherein the values in the linked list comprise varying amounts of data.
6. The system of claim 4 , further comprising:
allocating an amount of data memory for the linked list;
determining another some of a plurality of groups of registers that are to be reprogrammed and another remainder of the groups of registers are not to be reprogrammed;
allocating another amount of data memory; and
writing another linked list containing the values for each of the some of the plurality of groups of registers that are to be reprogrammed in the data memory, wherein the values for the some of the plurality of groups of registers are continuous in said linked list.