CN113688080B - DP signal transmission device and method for improving transmission link compatibility - Google Patents

Abstract

A DP signal transmission device and method for improving the compatibility of transmission links, comprising: an AUX proxy module is provided in an AUX auxiliary channel, the AUX proxy module monitors AUX communication, receives an AUX data packet and analyzes it, and analyzes the result according to the analysis result. Direct forwarding or forwarding AUX data packets after modification, including modifying the DP data transmission path supported by electronic equipment in the AUX data packet. The AUX proxy module has three working modes: direct forwarding, modified forwarding and active initiation, which can be automatically carried out according to the configuration. Switch or accept control passive switching from external control module. The invention has multiple working modes, is flexible, can modify the maximum number of Lanes supported in the returned AUX data packet, improves the compatibility of DP signal transmission, and solves the problem that the system cannot work normally. The compatibility of the DP signal transmission link has been improved.

Description

A DP signal transmission device and method for improving transmission link compatibility

technical field

The present invention relates to the field of high-definition signal transmission, in particular, to a device and method for transmitting DP signals, which can improve the compatibility of DP signal transmission links, and support 1 Lane (wherein Lane is data transmission in electronic devices such as signal sources and displays) Channel), 2 Lane and 4 Lane multi-channel data transmission, and when the DP signal transmission device supports fewer data transmission channels, the compatibility of the transmission link is improved.

Background technique

DisplayPort (DP for short) is a digital video interface standard developed by the PC and chip manufacturers alliance and standardized by the Video Electronics Standards Association (VESA), mainly used for video sources (such as notebooks, graphics cards, etc.) and electronic devices such as monitors are connected. . DP can be used to transmit audio and video at the same time.

The DP interface can not only support full HD display resolution (1920×1080), but also 4k resolution (3840×2160), and the latest 8k resolution (7680×4320). The DP interface not only has a high transmission rate, but also is reliable and stable. The signal transmitted by the interface consists of the data channel signal for transmitting the image and the auxiliary channel signal for transmitting the image-related status and control information, including the main data transmission channel (Main Link), AUX Auxiliary Channel (AUX Channel).

AUX Channel is an independent two-way transmission auxiliary channel in the DP interface. It adopts the AC-coupled differential transmission method. It is a two-way half-duplex transmission channel. The single direction rate is only about 1Mbit/s. It is used to transmit settings and Control instructions, including: reading Extended Display Identification Data (EDID) to ensure the correct transmission of DP signals; reading information on DP interfaces supported by electronic devices such as displays, such as the number of main channels and the transmission rate of DP signals; Carry out various settings of the display configuration register; read the electronic equipment status register.

The DP protocol specifies the point-to-point transmission of video and audio data in the main channel, where the main channel can be composed of 1, 2 or 4 differential signals, corresponding to the working modes of 1 Lane, 2 Lane and 4 Lane respectively. The video source or electronic device can also support up to 1 Lane, 2 Lane or 4 Lane. But it must be backward compatible, that is: devices (including cables) that support up to 4 Lanes can support working modes of 2 Lane and 1 Lane; devices that support up to 2 Lanes (including cables) can support working modes of 1 Lane, without the need for Supports 4 Lane mode; devices (including cables) that support up to 1 Lane only need to support 1 Lane mode, and do not need to support 2 Lane and 4 Lane modes.

In practical applications, after the signal source and the electronic device are connected by a cable, a series of handshake negotiations will be performed between the video source and the electronic device, and finally it is determined to work in a specific 1 Lane, 2 Lane or 4 Lane mode. During the negotiation process, another pair of AUX data packets specified by the DP protocol will be used to exchange relevant handshake information. The following example briefly introduces the process of handshake negotiation.

Referring to FIG. 1, a DP signal transmission device in the prior art is shown. The DP signal source 1 and the electronic device 2 are connected through a DP signal transmission device 3, which may be a standard DP cable, a USB-C cable or Just the internal PCB traces. After both the signal source 1 and the electronic device 2 are powered on, the signal source 1 will read the relevant signals of the electronic device 2 through the AUX auxiliary channel 30, including the maximum number of main link lanes supported by the electronic device 2 (1, 2 or 4). At the same time, the signal source 1 itself and the DP signal transmission device 3 also have the maximum number of lanes supported. The maximum number of lanes that the final system can work with is determined by the minimum value of the maximum number of lanes supported by the signal source, transmission link, and electronic equipment. For example, the signal source 1 supports a maximum of 4 Lanes, the DP signal transmission link 3 supports a maximum of 4 Lanes, and the electronic device 2 supports a maximum of 2 Lanes. Finally, the maximum number of Lanes that the entire system can work with is 2, that is, the system can only work in 1 Lane or 2 Lane mode. Cannot work in 4 Lane mode.

Since the DP protocol specifies the maximum rate of signals transmitted by each Lane, for example, in the DP1.2 standard, the maximum rate of each Lane can only be 5.4Gbps. It is not difficult to imagine that the more Lanes working simultaneously in the system, the more each Lane The higher the transmission rate, the larger the amount of data transmitted, and the larger the maximum resolution corresponding to the display. Therefore, in order to obtain the best user experience, the maximum number of Lanes supported by almost all DP signal sources, monitors and other electronic devices in the world is 4.

However, in practical applications, there are many cables that transmit DP signals, and for various reasons, the maximum number of lanes supported is only 2 or 1, which will bring some compatibility problems to users during use.

Referring to FIG. 2 , a situation in which the number of data transmission channels supported by the DP signal transmission apparatus in the prior art is shown is low. Signal source 1 and electronic device 2 support up to 4Lane, but the signal transmission device only supports 2Lane. As mentioned above, after the device is started, the signal source 1 will read the maximum number of lanes supported by the electronic device 2 through the AUX auxiliary channel 30, but following the DP protocol specification, the signal source 1 will not be transmitted from the DP signal transmission link. Gets the signal for the number of lanes supported. Therefore, the signal source will assume that the DP signal transmission chain has 4 main link lanes.

After the signal source 1 obtains the maximum number of lanes of the electronic device 2 of 4, combined with the maximum number of lanes it supports is also 4, before the electronic device is officially turned on, further handshakes will be performed to complete the negotiation process. The unit does not support 4 lanes, so the Link Training fails and the electronics cannot be lit.

Similarly, if the DP signal transmission device only supports 1 Lane, and the DP signal source and electronic equipment can support 2 Lane or 4 Lane mode, the final system may also fail to work properly due to training failure.

To sum up, since the existing protocol standard does not force the signal source to reduce the number of Lanes, and the maximum number of Lanes supported by the signal source and electronic equipment may exceed the number of Lanes supported by the DP signal transmission device, the electronic equipment cannot be lit and the system cannot be Normal work has become a technical problem that needs to be solved urgently in the prior art.

SUMMARY OF THE INVENTION

The purpose of the present invention is to provide a DP signal transmission device and method for improving the compatibility of the DP signal link, and greatly improve the compatibility of the DP signal transmission device including cables such as DP and USB-C.

For this purpose, the present invention adopts the following technical solutions:

A DP signal transmission device for improving the compatibility of transmission links is characterized in that, comprising:

It includes a first connection unit and a second connection unit, as well as a data transmission channel and an AUX auxiliary channel between the first and second connection units,

Wherein, the first connection unit is used to connect with the signal source;

a second connection unit for connecting with an electronic device, the electronic device being a device with a DP port;

A data transmission channel, which has one or more DP data transmission paths for transmitting DP image data;

AUX auxiliary channel, used to transmit AUX data packets, the AUX data packets include image setting and control information;

There is an AUX proxy module in the AUX auxiliary channel. The AUX proxy module is located between the signal source and the electronic device and is used to monitor AUX communication, receive and parse the AUX data packet, and forward it directly or after modification according to the analysis result. AUX packets.

Optionally, the AUX proxy module can monitor the read command of the signal source to the electronic device, and intercept the data returned by the electronic device, directly forward or modify it, and then return it to the signal source;

And/or, the AUX proxy module can monitor the write command of the signal source to the electronic device, and directly forward the write command to the electronic device, or intercept the write command, and then forward it to the electronic device after modification.

Optionally, the AUX agent module can also generate an AUX response signal to the signal source or initiate read and write commands to the electronic device.

Optionally, the AUX agent module can intercept the number of DP data transmission paths that the electronic equipment can support in the AUX signal returned by the electronic equipment to the signal source, when the number of DP data transmission paths supported by the DP signal transmission device is When it is less than the number of DP data transmission paths supported by the electronic device, modify the number of DP data transmission paths that the electronic device can support in the AUX signal returned by the electronic device, and then send the modified AUX signal to the signal source.

Optionally, after monitoring and parsing the AUX signal, the AUX proxy module directly forwards or modifies and forwards the AUX signal according to the parsing result.

Optionally, the AUX auxiliary channel also has a control module, the control module is connected with the AUX proxy module, and the control module issues an order to the AUX proxy module according to the analysis result of the AUX proxy module, so that the AUX proxy module is The module forwards and modifies the AUX information, or actively issues commands to the electronic device, and receives the result returned by the electronic device.

Optionally, the AUX proxy module has three working modes: direct forwarding, modified forwarding and active initiation, and can automatically perform mode switching according to the configuration or accept passive switching controlled by an external control module;

The direct forwarding mode is: after the AUX proxy module receives the data from one side, it directly forwards the received data packet to the other side.

The modified forwarding mode is: after the AUX agent module receives the AUX signal from one side, it modifies part of the content in the data packet, and then the modified AUX signal is forwarded to the other side;

The active initiation mode is: after the AUX proxy module receives the AUX signal from a certain side, it does not directly forward the AUX signal to the other side, or if the AUX proxy module receives a command from the signal source side, Then, according to the requirements or preset requirements of the external control module, a data packet is generated internally to respond to the signal source, or the AUX agent module actively sends relevant commands to the electronic device according to the dynamic requirements or preset requirements of the external control module, and receives electronic devices. The return result on the device side.

Optionally, the AUX agent module is located on the first connection unit or the second connection unit, or between the first connection unit and the second connection unit.

Optionally, the DP signal transmission device is a cable, and the first connection unit and the second connection unit are connected by optical fibers or copper wires.

The present invention further discloses a DP signal transmission method for improving the compatibility of transmission links. The method is used for DP signal transmission between a signal source and an electronic device, including:

An AUX proxy module is set in the AUX auxiliary channel. The AUX proxy module is located between the signal source and the electronic device and is used to monitor the AUX communication, receive and analyze the AUX data packet, and directly forward or modify it according to the analysis result. Forward AUX packets.

Optionally, the AUX proxy module can monitor the read command of the signal source to the electronic device, and intercept the data returned by the electronic device, directly forward or modify it, and then return it to the signal source;

And/or, the AUX agent module can monitor the write command of the signal source to the electronic device, and directly forward the write command to the electronic device, or intercept the write command, and then forward it to the electronic device after modification;

And/or, the AUX agent module can generate an AUX response signal to the signal source or initiate read and write commands to the electronic device.

Optionally, the AUX agent module can intercept the number of DP data transmission paths that the electronic equipment can support in the AUX signal returned by the electronic equipment to the signal source, when the number of DP data transmission paths supported by the DP signal transmission device is When it is less than the number of DP data transmission paths supported by the electronic device, modify the number of DP data transmission paths that the electronic device can support in the AUX signal returned by the electronic device, and then send the modified AUX signal to the signal source.

Optionally, after monitoring and parsing the AUX signal, the AUX proxy module can directly forward or modify the AUX signal according to the parsing result.

Or, the AUX auxiliary channel also has a control module, the control module is connected with the AUX proxy module, and the control module issues an order to the AUX proxy module according to the analysis result of the AUX proxy module, so that the AUX proxy module forwards , modify the AUX information, or actively issue commands to the electronic device, and receive the result returned by the electronic device.

Optionally, the AUX proxy module has three working modes: direct forwarding, modified forwarding and active initiation, and can automatically perform mode switching according to the configuration or accept passive switching controlled by an external control module;

The direct forwarding mode is: after the AUX proxy module receives the data from one side, it directly forwards the received data packet to the other side.

The modified forwarding mode is: after the AUX agent module receives the AUX signal from one side, it modifies part of the content in the data packet, and then the modified AUX signal is forwarded to the other side;

The active initiation mode is: after the AUX proxy module receives the AUX signal from a certain side, it does not directly forward the AUX signal to the other side, or if the AUX proxy module receives a command from the signal source side, Then, according to the requirements or preset requirements of the external control module, a data packet is generated internally to respond to the signal source, or the AUX agent module actively sends relevant commands to the electronic device according to the dynamic requirements or preset requirements of the external control module, and receives electronic devices. The return result on the device side.

To sum up, the present invention has the following advantages:

1. It can directly forward or modify AUX data packets, actively return corresponding signals or send commands to the electronic device, and accept the results returned by electronic devices such as displays, and the control method is flexible and changeable.

2. In view of the shortcomings of the existing DP protocol, compare the maximum number of lanes supported by the DP signal transmission device with the number of DP data transmission paths supported by electronic devices such as displays, and if necessary, modify the returned AUX data packets. The number of DP data transmission channels improves the compatibility of DP signal transmission and solves the problem that the system cannot work normally.

3. While solving the specific problem of DP signal transmission compatibility, it also reduces the need for equipment upgrades in existing equipment, that is, improves the compatibility of DP signal transmission links at low cost.

Description of drawings

1 is a schematic diagram of a DP signal transmission device in the prior art;

2 is a schematic diagram of a DP signal transmission device with a lower number of supported data transmission channels in the prior art;

3 is a schematic diagram of a DP signal transmission device according to a specific embodiment of the present invention;

4 is a data schematic diagram of an AUX data packet returned from an electronic device according to a specific embodiment of the present invention;

5 is a data schematic diagram of an AUX data packet modified by an AUX proxy module according to a specific embodiment of the present invention;

FIG. 6 is a schematic diagram of a DP signal transmission apparatus according to another specific embodiment of the present invention.

The technical features denoted by the reference numbers in the figures are:

1. Signal source; 2. Electronic equipment; 3. DP signal transmission device; 10. First connection unit; 12. Second connection unit; 20. Data transmission channel; 30. AUX auxiliary channel; 40. AUX proxy module; 50 , Control module.

Detailed ways

The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention, but not to limit the present invention. In addition, it should be noted that, for the convenience of description, the drawings only show some but not all structures related to the present invention.

As can be seen from the background art, the reason for the problem is:

1) The maximum number of Lanes (data transmission paths) supported by the DP signal transmission device is less than the maximum number of Lanes supported by electronic equipment such as signal sources and displays, and

2) The DP signal transmission device is transparent to the signal source, that is, the signal source 1 cannot know the number of Lanes supported by the DP signal transmission link, and

3) The signal source that supports up to 4 Lane will not continue to try 2 Lane and 1 Lane mode after the 4 Lane link calibration (Link training) fails; or the signal source that supports the maximum 2 Lane will not continue to try after the 2 Lane training failure 1 Lane mode.

At the same time, all handshake negotiations in the training process are transmitted through the AUX channel, so the compatibility problem described in the present invention can be solved only by acquiring the communication content of the AUX and making some adjustments to the communication content.

Therefore, the present invention is to set the AUX proxy module in the AUX auxiliary channel of the existing DP signal transmission device, so that the AUX data packet is no longer directly transmitted, but forwarded through the AUX proxy module, and the AUX proxy module can directly forward or modify Forwarding the information transmitted by AUX, in particular, when the maximum number of lanes supported by electronic devices such as displays is higher than the maximum number of lanes supported by the DP signal transmission device, the maximum number of lanes supported in the AUX data packet can be modified. Further, the DP signal transmission device also has a control module 50, which can actively issue commands, so that the AUX proxy module modifies specific information in the AUX data packet.

Specifically, referring to FIG. 3, a schematic diagram of a DP signal transmission apparatus according to a specific embodiment of the present invention is shown,

The DP signal transmission device includes a first connection unit 10 and a second connection unit 12, and a data transmission channel 20 and an AUX auxiliary channel 30 located between the first and second connection units,

Wherein, the first connection unit 10 is used to connect with the signal source 1;

The second connection unit 12 is used to connect with the electronic device 2. In the present invention, the electronic device 2 includes a display, a hub, a cable and other devices with DP ports;

The data transmission channel 20 has one or more DP data transmission paths, namely Lane, for transmitting DP image data;

AUX auxiliary channel 30 is used to transmit AUX data packets, and the AUX data packets include image setting and control information;

There is an AUX proxy module 40 in the AUX auxiliary channel. The AUX proxy module blocks the direct transmission of AUX data packets and is located between the signal source 1 and the electronic device 2. For example, the AUX proxy module is located in the AUX signal of the two connection units. The pins are respectively connected with the AUX signal pins of the two connection units, which are used to monitor the AUX communication, receive the AUX data packet and analyze it, and forward the AUX data packet directly or after modification according to the analysis result.

Specifically, the AUX proxy module 40 can monitor the read command from the signal source 1 to the electronic device 2 , intercept the data returned by the electronic device 2 , directly forward or modify it, and then return it to the signal source 1 .

And/or, the AUX agent module 40 can monitor the write command of the signal source 1 to the electronic device 2, and directly forward the write command to the electronic device 2, or intercept the write command, and then forward it to the electronic device 2 after modification. Electronic equipment.

Therefore, in the present invention, the AUX proxy module can forward or modify the AUX data packet, thereby improving the compatibility of the DP signal channel.

In a specific embodiment, the AUX proxy module monitors the AUX communication, including monitoring the AUX communication at one end of the signal source 1 and the electronic device 2, and/or monitoring the AUX communication at both ends.

Example:

This embodiment takes the maximum number of supported lanes carried in the AUX data package as an example. The AUX proxy module can intercept the information about the maximum number of lanes that the electronic device can support in the AUX data package returned by the electronic device 2 to the signal source 1. When When the maximum number of lanes supported by the DP signal transmission device is less than the maximum number of lanes supported by the electronic device 2, modify the information about the maximum lane that the electronic device can support in the AUX data packet returned by the electronic device 2, and then send the modified AUX data packet. to the signal source.

It includes the following steps:

1) The AUX proxy module 40 listens to the command from the signal source 1 from the signal source 1 side, and parses the command while forwarding the command directly to the electronic device 2 side. If the command is an attempt to read the electronic device 2 If the DPCD contains the contents of the register whose address is 0002, the module enters the modified forwarding state;

2) After receiving the relevant command, the electronic device 2 will respond truthfully and return the response data through the AUX auxiliary channel 30. Since the AUX auxiliary channel is cut off by the AUX proxy module 40, the AUX proxy module 40 will first receive the The response data of the electronic device 2.

Optionally, the AUX proxy module 40 is located on the first connection unit 10 or the second connection unit 12, or between the first connection unit and the second connection unit.

Specifically, referring to FIG. 4 , it shows a data schematic diagram of the AUX data packet returned from the electronic device. From this figure, it can be seen that the MAX_LANE_COUNT field in the 0002 address shows that the maximum number of lanes it supports is 4.

3) The AUX proxy module 40 monitors the AUX channel on the electronic device side, and receives the response data packet from the electronic device 2, and then the AUX proxy module 40 parses the data packet. number) exceeds the maximum number of lanes supported by the link during DP signal transmission, then according to the actual maximum number of lanes supported by the DP signal transmission link (may be 1 or 2), modify the MAX_LANE_COUNT field in the 0002 address to the corresponding value (1 or 2). 2), and then reply the modified data packet to the signal source.

Specifically, referring to FIG. 5 , it shows a data schematic diagram of an AUX data packet modified by the AUX proxy module according to a specific embodiment of the present invention. In this figure, MAX_LANE_COUNT has been modified to 2.

4) The signal source 2 receives the data from the AUX proxy module 40, and the maximum number of lanes supported by the electronic device is processed by the AUX proxy module 40, so the maximum number of lanes is already enough for the electronic device and the DP signal transmission link. Normal supported mode. Because this modification process is transparent to the signal source, the signal source configures the electronics with the modified number of lanes, trains, and functions normally.

In the DP1.2a protocol, it is not mandatory for the signal source to continue to try the 2/1Lane mode after the 4-lane mode training fails, or to continue to try the 1-lane mode after the 2-lane mode training fails, so that such signal sources cooperate with the maximum support lane. When the number of DP signal transmission links is smaller than that of electronic equipment, the system cannot work normally. Although the subsequent DP protocol versions, such as 1.3a and 1.4a, have been corrected, the price of DP devices due to the DP1.2a standard is much lower than that of higher version devices, so most devices on the market are currently on the market. All follow the standard of DP1.2a. Therefore, you can encounter this compatibility problem. While solving specific problems, the present invention also reduces the need for equipment upgrade, and improves the compatibility of the DP signal transmission link under the condition of low cost.

In the embodiment of the present invention, the maximum number of lanes is in the MAX_LANE_COUNT field in the 0002 address, but this is only an example. The maximum number of lanes may also appear in other fields in other addresses. As long as the information modification of the corresponding field in the corresponding address in the AUX data packet is implemented, it is all within the scope of protection required by the present invention.

In this embodiment, the AUX proxy module 40 monitors the command from the signal source 1 from the signal source 1 side, but step 1 is not necessary, and the AUX proxy module 40 can modify the AUX data packet independently of the 0002 address. The read command is only based on identifying the corresponding data whose address is 0002 returned by the electronic device 2 to the signal source 1 on the AUX channel.

In a specific embodiment, the AUX agent module can also generate an AUX response signal to the signal source or initiate read and write commands to the electronic device.

The AUX proxy module 40 of the present invention can directly forward or modify the AUX data packet according to the analysis result after monitoring and analyzing the AUX data packet.

Further, referring to FIG. 6 , a schematic diagram of a DP signal transmission apparatus according to another specific embodiment of the present invention. The AUX auxiliary channel 30 may also have a control module 50, the control module 50 is connected with the AUX proxy module 40, and the control module 50 issues an order to the AUX proxy module 40 according to the analysis result of the AUX proxy module, The AUX agent module 40 is made to forward and modify the AUX information, or to actively issue commands to the electronic device 2, and receive the result returned by the electronic device.

Therefore, through the control module 50, the AUX auxiliary channel 30 is more flexible for the transmission of the AUX data packets, not only can forward and modify the AUX data packets, but also can actively issue commands to the electronic device 2, and receive the returned electronic device. As a result, not only can the maximum number of LANEs in the AUX data packet returned by the electronic device end 2 be modified, but also other parameters in the returned AUX data packet can be modified; For forwarding, it can also actively generate an AUX response signal to the signal source, or actively initiate read and write commands to the electronic device.

For example, the data transmission channel 20 of the DP signal supports three working modes of 1, 2, and 4lane, wherein the rate supported by each lane can be 1.62Gbps, 2.7Gbps, 5.4Gbs or 8.1Gbps. There will be a register with a DPCD address of 0001 inside the electronic device, which is used to inform the maximum rate supported by the video source. For example, if the register value of the address 0001 is 14h, then the maximum data transmission rate of each lane supported by the electronic device is 5.4Gbps; if the register value is 1Eh, then the maximum data rate of each lane supported by the electronic device is 5.4Gbps. The transmission rate is 8.1Gbps. The larger the maximum rate supported, the larger the maximum resolution supported by the electronic device.

But sometimes, the maximum transmission rate supported by the DP signal transmission link (data transmission channel 20 ) is smaller than the rate supported by the electronic device due to various reasons. For example, an electronic device supports a maximum of 8.1Gbps, but a small amount of data errors will occur when the DP signal transmission link transmits 8.1Gbps data. One of the final results is that the training of the system is successful, and the video source, transmission link, and electronic equipment are all working. At 8.1Gbps, but due to insufficient transmission link bandwidth, possible phenomena are stripes, snowflakes, etc. on electronic equipment. Bring a bad customer experience.

At this time, the present invention can modify the value of the register from 1Eh to 14h, that is, to tell the signal source that the electronic device does not support 8.1Gbps. At this time, the signal source will not try 8.1Gbps signal transmission, and the whole system works directly at 5.4Gbps. For example, when the source accesses this register through the AUX channel, replace the value of this register provided by the electronics on the AUX channel with 14h. Although relatively working at 8.1Gbps, the resolution or refresh rate will be reduced, but it can ensure stable work, which is particularly important for some applications with high reliability requirements.

Therefore, it can be seen from the above that the AUX proxy module 40 has three working modes: direct forwarding, modified forwarding and active initiation, and can automatically switch modes according to the configuration or accept passive switching controlled by an external control module.

The direct forwarding mode is: after the AUX proxy module 40 receives the data from one side, it directly forwards the received data packet to the other side.

The modified forwarding mode is: after receiving the data from one side, the AUX proxy module 40 modifies part of the content in the data packet, and then forwards the modified data to the other side.

The active initiation mode is: after the AUX proxy module 40 receives the data from a certain side, it does not directly forward the data to the other side, or if the AUX proxy module 40 receives a command from the signal source side, it will The request or preset request of the external control module 50 internally generates a data packet to respond to the signal source, or the AUX agent module 40 actively sends relevant commands to the electronic device according to the dynamic request or preset request of the external control module 50, and receives The result returned by the electronic device,

For example, the AUX proxy module may actively query the rate supported by the electronic device, and identify in advance whether the rate supported by the electronic device is consistent with the rate supported by the DP signal transmission apparatus. Further, when it is recognized that the maximum rates supported by the two are inconsistent, in response to receiving a command from the signal source, a data packet is internally generated to respond to the signal source, and the data packet carries the energy that can make the DP signal transmission device and the electronic equipment normal. rate of work.

In the present invention, the DP signal transmission device may be a cable, and the first connection unit and the second connection unit may be connected by optical fibers or copper wires.

The present invention further discloses a DP signal transmission method for improving the compatibility of transmission links. The method is used for DP signal transmission between a signal source and an electronic device, including:

An AUX proxy module is set in the AUX auxiliary channel. The AUX proxy module is located between the signal source 1 and the electronic device 2 and is used to monitor the AUX communication, receive and analyze the AUX data packets, and directly forward or parse the AUX data packets according to the analysis results. Forward AUX packets after modification.

Further, the AUX agent module can monitor the reading command of the signal source to the electronic device, and intercept the data returned by the electronic device, directly forward or modify it, and then return it to the signal source;

And/or, the AUX agent module can monitor the write command of the signal source to the electronic device, and directly forward the write command to the electronic device, or intercept the write command, and then forward it to the electronic device after modification;

And/or, the AUX agent module can generate an AUX response signal to the signal source or initiate read and write commands to the electronic device.

The AUX agent module can intercept the number of data transmission paths that the electronic equipment can support in the AUX signal returned by the electronic equipment to the signal source, when the number of data transmission paths supported by the DP signal transmission device is less than the data supported by the electronic equipment. When determining the number of transmission channels, modify the number of data transmission channels that the electronic device can support in the AUX signal returned by the electronic device, and then send the modified AUX signal to the signal source.

After monitoring and parsing the AUX data packet, the AUX proxy module can directly forward or modify the AUX data packet according to the result of the parsing.

Or, the AUX auxiliary channel also has a control module, the control module is connected with the AUX proxy module, and the control module issues an order to the AUX proxy module according to the analysis result of the AUX proxy module, so that the AUX proxy module forwards , modify the AUX information, or actively issue commands to the electronic device, and receive the result returned by the electronic device.

The AUX agent module has three working modes: direct forwarding, modified forwarding and active initiation, and can automatically switch modes according to the configuration or accept passive switching controlled by an external control module;

The direct forwarding mode is: after the AUX proxy module receives the data from one side, it directly forwards the received data packet to the other side.

The modified forwarding mode is: after the AUX agent module receives the AUX signal from one side, it modifies part of the content in the data packet, and then the modified AUX signal is forwarded to the other side;

The active initiation mode is: after the AUX proxy module receives the AUX signal from a certain side, it does not directly forward the AUX signal to the other side, or if the AUX proxy module receives a command from the signal source side, Then, according to the requirements or preset requirements of the external control module, a data packet is generated internally to respond to the signal source, or the AUX agent module actively sends relevant commands to the electronic device according to the dynamic requirements or preset requirements of the external control module, and receives electronic devices. The return result on the device side.

To sum up, the present invention has the following advantages:

1. It can directly forward or modify AUX data packets, actively return corresponding signals or send commands to the electronic device, and accept the results returned by the electronic device, and the control method is flexible and changeable.

2. In view of the shortcomings of the existing DP protocol, compare the maximum number of lanes supported by the DP signal transmission device with the maximum number of lanes supported by the electronic device, and if necessary, modify the maximum number of lanes supported in the returned AUX data packet. Improve the compatibility of DP signal transmission and solve the problem that the system cannot work normally.

3. While solving the specific problem of DP signal transmission compatibility, it also reduces the need for equipment upgrades in existing equipment, that is, improves the compatibility of DP signal transmission links at low cost.

Obviously, those skilled in the art should understand that the above-mentioned units or steps of the present invention can be implemented by a general-purpose computing device, they can be concentrated on a single computing device, or alternatively, they can be implemented by a program executable by the computer device code so that they can be stored in a storage device and executed by a computing device, or they can be separately fabricated into individual integrated circuit modules, or multiple modules or steps of them can be fabricated into a single integrated circuit module. As such, the present invention is not limited to any specific combination of hardware and software.

The above content is a further detailed description of the present invention in conjunction with the specific preferred embodiments, and it cannot be considered that the specific embodiments of the present invention are limited to this. Below, some simple deductions or substitutions can also be made, all of which should be regarded as belonging to the protection scope of the present invention determined by the submitted claims.

Claims (12)

1. A DP signal transmission apparatus for improving transmission link compatibility, comprising:

comprises a first connection unit, a second connection unit, a data transmission channel and an AUX auxiliary channel which are positioned between the first connection unit and the second connection unit,

the first connecting unit is used for being connected with a signal source;

the second connecting unit is used for connecting with electronic equipment, and the electronic equipment is equipment with a DP port;

a data transmission channel having one or more DP data transmission paths for transmitting DP image data;

the AUX auxiliary channel is used for transmitting an AUX data packet, and the AUX data packet comprises image setting and control information;

the AUX auxiliary channel is provided with an AUX agent module, the AUX agent module is positioned between the signal source and the electronic equipment and is used for monitoring AUX communication, receiving and analyzing the AUX data packet, and directly forwarding or forwarding the AUX data packet after modification according to the analysis result;

specifically, the AUX proxy module may intercept the number of DP data transmission paths that can be supported by the electronic device in an AUX signal returned to the signal source by the electronic device, modify the number of DP data transmission paths that can be supported by the electronic device in the AUX signal returned by the electronic device when the number of DP data transmission paths supported by the DP signal transmission apparatus is less than the number of DP data transmission paths supported by the electronic device, and then send the modified AUX signal to the signal source.

2. The DP signal transmission apparatus of claim 1,

the AUX agent module can monitor a reading command of a signal source to the electronic equipment, intercept data returned by the electronic equipment, and directly forward or return the data to the signal source after modification;

and/or the AUX agent module can monitor a write-in command of the signal source to the electronic equipment, and directly forward the write-in command to the electronic equipment, or intercept the write-in command, and forward the modified write-in command to the electronic equipment.

3. The DP signal transmission apparatus according to claim 1 or 2,

the AUX agent module can also generate an AUX response signal to a signal source or initiate a read-write command to the electronic equipment.

4. The DP signal transmission apparatus of claim 3,

after monitoring and analyzing the AUX signal, the AUX agent module directly forwards or forwards the AUX signal after modification according to the analysis result.

5. The DP signal transmission apparatus of claim 3,

the AUX auxiliary channel is also provided with a control module, the control module is connected with the AUX agent module, and the control module issues commands to the AUX agent module according to the analysis result of the AUX agent module, so that the AUX agent module forwards and modifies AUX information, or actively issues commands to the electronic equipment, and receives the result returned by the electronic equipment terminal.

6. The DP signal transmission apparatus of claim 4 or 5,

the AUX agent module has three working modes of direct forwarding, modified forwarding and active initiation, and can automatically switch modes or accept the control passive switching of an external control module according to configuration;

the direct forwarding mode is as follows: after receiving the data from one side, the AUX agent module directly forwards the received data packet to the other side;

the modified forwarding mode is as follows: after receiving the AUX signal from one side, the AUX agent module modifies part of the content in the data packet and then forwards the modified AUX signal to the other side;

the active initiation mode is as follows: the AUX agent module does not directly forward the AUX signal to the other side after receiving the AUX signal from one side, or if the AUX agent module receives a command from the signal source side, a data packet is internally generated according to the requirement or preset requirement of the external control module and is responded to the signal source, or the AUX agent module actively sends a related command to the electronic equipment end according to the dynamic requirement or preset requirement of the external control module and receives a return result of the electronic equipment end.

7. The DP signal transmission apparatus of claim 6,

and the AUX agent module is positioned on the first connection unit or the second connection unit or between the first connection unit and the second connection unit.

8. The DP signal transmission apparatus of claim 6,

the DP signal transmission device is a cable, and the first connection unit and the second connection unit are connected through an optical fiber or a copper wire.

9. A DP signal transmission method for improving transmission link compatibility, the method being used for DP signal transmission between a signal source and an electronic device, comprising:

an AUX agent module is arranged in the AUX auxiliary channel, is positioned between the signal source and the electronic equipment and is used for monitoring AUX communication, receiving and analyzing an AUX data packet, and directly forwarding or forwarding the AUX data packet after modification according to an analysis result;

specifically, the AUX proxy module may intercept the number of DP data transmission paths that can be supported by the electronic device in an AUX signal returned to the signal source by the electronic device, modify the number of DP data transmission paths that can be supported by the electronic device in an AUX signal returned by the electronic device when the number of DP data transmission paths supported by the DP signal transmission apparatus is less than the number of DP data transmission paths supported by the electronic device, and then send the modified AUX signal to the signal source.

10. The DP signal transmission method according to claim 9, characterized in that:

the AUX agent module can monitor a reading command of a signal source to the electronic equipment, intercept data returned by the electronic equipment, and directly forward or return the data to the signal source after modification;

and/or the AUX agent module can monitor a write-in command of a signal source to the electronic equipment, and directly forward the write-in command to the electronic equipment, or intercept the write-in command, and forward the modified write-in command to the electronic equipment;

and/or the AUX agent module can generate an AUX response signal to a signal source or initiate a read-write command to the electronic equipment.

11. The DP signal transmission method according to claim 10, characterized in that:

the AUX agent module can directly forward or forward the AUX signal after modification according to the analysis result after monitoring and analyzing the AUX signal;

or the AUX auxiliary channel is also provided with a control module, the control module is connected with the AUX agent module, and the control module issues a command to the AUX agent module according to the analysis result of the AUX agent module, so that the AUX agent module forwards and modifies AUX information, or actively issues the command to the electronic equipment, and receives the result returned by the electronic equipment terminal.

12. The DP signal transmission method according to claim 11, characterized in that:

the AUX agent module has three working modes of direct forwarding, modified forwarding and active initiation, and can automatically switch modes or accept the control passive switching of an external control module according to configuration;

the direct forwarding mode is as follows: after receiving the data from one side, the AUX agent module directly forwards the received data packet to the other side;

the modified forwarding mode is as follows: after receiving the AUX signal from one side, the AUX agent module modifies part of the content in the data packet and then forwards the modified AUX signal to the other side;

the active initiation mode is as follows: the AUX agent module does not directly forward the AUX signal to the other side after receiving the AUX signal from one side, or if the AUX agent module receives a command from the signal source side, a data packet is internally generated according to the requirement or preset requirement of the external control module and is responded to the signal source, or the AUX agent module actively sends a related command to the electronic equipment end according to the dynamic requirement or preset requirement of the external control module and receives a return result of the electronic equipment end.

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