Firmware upgrade method and firmware upgrade system based on multi-stream transmission mode of DisplayPort interface

A firmware upgrade system based on a multi-stream transport mode of a DisplayPort (DP) interface, the firmware upgrade system comprising:

• a plurality of displays each including:
• a receiver circuit connected to a display DP interface;
• a multi-stream processing module connected to the receiver circuit;
• a display firmware upgrade module connected to the multi-stream processing module;
• and
• a firmware storage device configured to store a firmware;
• a host connected in series with the displays in a daisy chain topology, wherein the host includes:
• a communication module connected to a host DP interface, wherein the communication module is configured to obtain a plurality of records of firmware information of the plurality of displays through a DP auxiliary channel;
• a host firmware upgrade module configured to select a target display of the plurality of displays for firmware upgrade,
• wherein the host and the plurality of displays are configured to execute a firmware upgrade process, including:
• configuring the host firmware upgrade module to transmit an upgrade start command and firmware upgrade data to the target display;
• configuring each of the plurality of displays to:
• receive the upgrade start command and the firmware upgrade data through the receiver circuit;
• configure the multi-stream processing module to determine whether the upgrade start command and the firmware upgrade data reach the target display;
• in response to determining that the upgrade start command and the firmware upgrade data do not reach the target display, configure the multi-stream processing module to transmit the upgrade start command and the firmware upgrade data to a next one of the displays in the daisy chain topology through the transmitter circuit;
• and
• in response to determining that the upgrade start command and the firmware upgrade data reach the target display, configure a display firmware upgrade module to execute a firmware upgrade preparation process according to the upgrade start command, and write the firmware upgrade data to a firmware storage device of the target display;
• configuring the host firmware upgrade module to transmit a request for obtaining a firmware upgrade result to the target display;
• and
• configuring each of the plurality of displays to:
• receive the request for obtaining the firmware upgrade result through the receiver circuit;
• configure the multi-stream processing module to determine whether the request for obtaining the firmware upgrade result reaches the target display;
• in response to determining that the request for obtaining the firmware upgrade result does not reach the target display, transmit the request to the next display through the transmitter circuit;
• in response to determining that the request for obtaining the firmware upgrade result reaches the target display, configure the display firmware upgrade module to check firmware data in the firmware storage device and transmit an upgrade result message to the host,
• wherein the host firmware upgrade module is configured to include the upgrade start command and the firmware upgrade data in a sideband message, and to transmit the sideband message through the DP auxiliary channel, and the sideband message includes a message header and a message body, wherein in the step of determining whether the upgrade start command and the firmware upgrade data reach the target display, the multi-stream processing module is further configured to analyze the message header to obtain a total link count and a remaining link count, and determine whether the remaining link count is a predetermined value;
• and
• wherein the display firmware upgrade module is configured to determine according to data segment from the multi-stream processing module, whether the data segment corresponds to the upgrade start command or the firmware upgrade data, so as to determine whether to execute the firmware upgrade preparation process according to the upgrade start command, or to write the firmware data into the firmware storage device of the target display.