Portable computer based on Loongson platform

Abstract

The invention relates to a portable computer based on a Loongson platform. The portable computer is characterized in that an HDMI (High Definition Multimedia Interface) to EDP (Electronic Data Processing) chip is electrically connected between a first HDMI interface of an LS7A2000 chip and a built-in display; a second HDMI interface of the LS7A2000 chip is electrically connected with a first I / O port of the multiplexer / demultiplexer, the HDMI-to-DP chip is electrically connected between a second I / O port of the multiplexer / demultiplexer and a first I / O port of the intelligent high-speed bus switch, and a third I / O port of the multiplexer / demultiplexer is electrically connected with an HDMI Type-A interface. A USB3.0 interface of the LS7A2000 chip is electrically connected with a second I / O port of the intelligent high-speed bus switch, and a third I / O port of the intelligent high-speed bus switch is electrically connected with the Type-C interface; the embedded controller generates a selection signal, and the multiplexer / demultiplexer controls one of the second I / O port and the third I / O port thereof to be communicated with the first I / O port thereof according to the selection signal. According to the invention, built-in high-definition screen display, HDMI Type-A interface extended display and Type-C interface DP display are supported.

Description

Technical Field

[0001] The present invention relates to the field of computer technology, and in particular to a portable computer based on a Loongson platform. Background Art

[0002] A portable computer is a small, lightweight, and portable personal computer. Other names include notebook computers, handheld computers, PDAs, and laptop computers. The main feature of a portable computer is its portability, which allows users to use it at home, in the office, or anywhere else, supporting mobile office work in a short period of time. Despite its small size, the performance and functions of a portable computer are comparable to those of a traditional split desktop computer, and it can handle a variety of tasks, such as processing documents, editing videos, playing games, etc.

[0003] If a portable computer can support multiple extended displays, it will bring many conveniences and benefits to users. For example, it can easily realize multitasking, improve work efficiency, and watch videos or play games on one screen while chatting with friends or checking social media on another screen. Usually, the portable computers on the market that support multiple extended displays are mostly notebooks based on the Intel platform. In addition to the built-in LCD display screen, some also support external display interfaces such as HDMI and DISPLAY PORT.

[0004] The Loongson 7A2000 processor independent graphics bridge chip is a product launched by Loongson Technology in July 2022 that integrates a self-developed GPU. As a supporting bridge chip for the Loongson series CPU, this chip can be connected to the Loongson 3 series processors through the HT high-speed bus interface. It integrates GPU, DC, DDR4 video memory controller, as well as PCIE3.0, SATA3.0, USB3.0, GMAC, HDMI, I2C, UART, GPIO and other interfaces, which can provide rich north and south bridge functions for the Loongson processor.

[0005] Currently, the portable computers based on the Loongson platform on the market can only support two display devices at most because the Loongson LS7A2000 has only two HDMI outputs natively. Therefore, without further design, it can only support two display devices at most. Summary of the invention

[0006] Therefore, an object of the present invention is to provide a portable computer based on the Loongson platform, which supports multiple display outputs.

[0007] Another object of the present invention is to provide a portable computer based on the Loongson platform, comprising: an LS7A2000 chip as a supporting bridge chip for the Loongson processor, an HDMI to EDP chip, a built-in display, a multiplexer / demultiplexer, an HDMI to DP chip, an intelligent high-speed bus switch, an HDMI Type-A interface, a Type-C interface, and an embedded controller; the HDMI to EDP chip is electrically connected between the first HDMI interface of the LS7A2000 chip and the built-in display; the second HDMI interface of the LS7A2000 chip is electrically connected to the first I / O port of the multiplexer / demultiplexer, the HDMI to DP chip is electrically connected between the second I / O port of the multiplexer / demultiplexer and the first I / O port of the intelligent high-speed bus switch, and the third I / O port of the multiplexer / demultiplexer is electrically connected to the HDMI Type-A interface so as to be able to connect to an external HDMI The display, the USB3.0 interface of the LS7A2000 chip is electrically connected to the second I / O port of the intelligent high-speed bus switch, the third I / O port of the intelligent high-speed bus switch is electrically connected to the Type-C interface so as to be able to connect an external DP display or a device supporting the USB protocol; the first detection port of the embedded controller is electrically connected to the HDMI Type-A interface to detect the hot plug signal generated by the HDMI display being connected to the HDMI Type-A interface, the second detection port of the embedded controller is electrically connected to the intelligent high-speed bus switch to detect the hot plug signal generated by the DP display being connected to the Type-C interface, the embedded controller generates a selection signal according to the detected access status of the external display, the output end of the embedded controller is electrically connected to the multiplexer / demultiplexer to output the selection signal thereto, and the multiplexer / demultiplexer controls one of its second I / O port and the third I / O port to be connected to its first I / O port according to the selection signal to transmit the HDMI signal.

[0008] When neither the first detection port nor the second detection port of the embedded controller detects the connection of an external display, the embedded controller outputs a selection signal to the multiplexer / demultiplexer to control the third I / O port of the multiplexer / demultiplexer to connect to its first I / O port to transmit the HDMI signal.

[0009] When both the first detection port and the second detection port of the embedded controller detect that an external display is connected, the embedded controller outputs a selection signal to the multiplexer / demultiplexer in the order in which the external displays are connected to control the first I / O port of the multiplexer / demultiplexer to connect to the external display connected first to transmit the HDMI signal.

[0010] Wherein, the HDMI to EDP chip is MT9700.

[0011] Wherein, the multiplexer / demultiplexer is ASW3642.

[0012] Wherein, the HDMI to DP chip is CS5801.

[0013] Wherein, the intelligent high-speed bus switch is ANX7447.

[0014] Wherein, the embedded controller is IT8528.

[0015] In summary, the portable computer based on the Loongson platform of the present invention supports built-in high-definition screen display, HDMI Type-A interface extended display, and Type-C interface DP display, which brings extremely high application experience and convenience to users of Loongson platform portable computers. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The following detailed description of the specific embodiments of the present invention in conjunction with the accompanying drawings will make the technical solutions and other beneficial effects of the present invention apparent.

[0017] Figure 1 The present invention is a circuit block diagram of a portable computer based on the Loongson platform;

[0018] Figure 2 The present invention is a circuit block diagram of a preferred embodiment of a portable computer based on the Loongson platform. DETAILED DESCRIPTION

[0019] See also Figure 1 and Figure 2 , Figure 1 The circuit block diagram of the portable computer based on the Loongson platform of the present invention is shown in FIG. Figure 2 The circuit block diagram of its preferred embodiment. The portable computer based on the Loongson platform of the present invention mainly includes: an LS7A2000 chip as a supporting bridge chip for the Loongson processor, an HDMI to EDP chip, a built-in display, a multiplexer / demultiplexer, an HDMI to DP chip, an intelligent high-speed bus switch, an HDMI Type-A interface, a Type-C interface, and an embedded controller; the display conversion solution of the present invention is mainly described here, and the general settings of the portable computer based on the Loongson platform are not repeated here.

[0020] In this solution, the HDMI to EDP chip is electrically connected between the first HDMI interface of the LS7A2000 chip and the built-in display, so that the first HDMI output of the LS7A2000 chip is used to realize the first display of the built-in display of the portable computer; the second HDMI interface of the LS7A2000 chip is electrically connected to the first I / O port of the multiplexer / demultiplexer, the HDMI to DP chip is electrically connected between the second I / O port of the multiplexer / demultiplexer and the first I / O port of the intelligent high-speed bus switch, the third I / O port of the multiplexer / demultiplexer is electrically connected to the HDMI Type-A interface so as to be able to connect to an external HDMI display, the USB3.0 interface of the LS7A2000 chip is electrically connected to the second I / O port of the intelligent high-speed bus switch, and the third I / O port of the intelligent high-speed bus switch is electrically connected to the Type-C interface so as to be able to connect to an external DP display or a device supporting the USB protocol; thereby, the second HDMI output of the LS7A2000 chip is expanded into two HDMI outputs by using the multiplexer / demultiplexer, one of which is used to support an external HDMI The Type-C interface for the external DP monitor also supports the connection of high-speed USB devices, such as storage, so as to make full use of the various functional ports of the intelligent high-speed bus switch and the USB3.0 interface of the LS7A2000 chip.

[0021] The first detection port of the embedded controller is electrically connected to the HDMI Type-A interface to detect the hot plug signal generated by the HDMI display being connected to the HDMI Type-A interface, the second detection port of the embedded controller is electrically connected to the intelligent high-speed bus switch to detect the hot plug signal generated by the DP display being connected to the Type-C interface, the embedded controller generates a selection signal according to the detected external display access status, the output end of the embedded controller is electrically connected to the multiplexer / demultiplexer to output the selection signal thereto, and the multiplexer / demultiplexer controls one of its second I / O port and the third I / O port to be connected to its first I / O port according to the selection signal to transmit the HDMI signal. Thus, the two HDMI outputs expanded by the multiplexer / demultiplexer can be controlled by the embedded controller so as not to interfere with each other, and a suitable output can be selected in accordance with various application scenarios.

[0022] The present invention realizes a variety of extended displays on a portable computer of the Loongson platform through a display conversion scheme, utilizing a multiplexer / demultiplexer, an intelligent high-speed bus switch, an embedded controller (EC) as an inserted inspection controller, and other design schemes, supporting built-in high-definition screen display, HDMI Type-A interface extended display, and Type-C interface DP display, bringing extremely high application experience and convenience to users of portable computers of the Loongson platform.

[0023] See also Figure 2 In the preferred embodiment of the present invention, the HDMI to EDP chip specifically adopts MT9700, the multiplexer / demultiplexer specifically adopts ASW3642, the HDMI to DP chip specifically adopts CS5801, the intelligent high-speed bus switch specifically adopts ANX7447, and the embedded controller specifically adopts IT8528. The principle of the technical solution of the present invention is explained below in conjunction with this preferred embodiment.

[0024] Loongson GPU 7A2000 (U1) has two high-definition display outputs, HDMI0 and HDMI1. The HDMI0 output interface is connected to the display conversion chip MT9700 (U2) to realize HDMI to EDP conversion, so that the display bus can be connected to the built-in LCD screen, which can specifically support 2240x1400 resolution and 1920X1080 resolution screens. In addition, this solution can support the scaler function, and users can switch between multiple resolutions under the system.

[0025] HDMI1 is connected to the multiplexer / demultiplexer IC ASW3642 (U3), thereby expanding 2 HDMI channels. One channel is connected to the display conversion chip CS5801 (U4) to realize HDMI to Display port (DP) display. The DPX4 bus is then connected to the intelligent high-speed bus switch ANX7447 (U5) to output TX / RX high-speed differential signals to the Type-C interface to realize Type-C DP display or Type-C USB3.0 storage function. The other HDMI channel expanded by ASW3642 (U3) is connected to the HDMI Type-A interface connector to realize external expansion of HDMI display.

[0026] In this preferred embodiment, the switching principle of ASW3642 (U3) is that when the HDMI Type-A interface is connected to the HDMI display, a hot plug signal HPD#1 high level is generated and input into the embedded controller IT8528 (U6). After U6 GPIO0 PIN detects the high level, it outputs GPIO2 high level to ASW3642 (U3) SEL PIN. After U3 detects the high level of SEL PIN, it switches the HDMI1 display channel of Loongson 7A2000 (U1) to the HDMI Type-A display output. When the Type-C interface is connected to the DP monitor, ANX7447 (U5) will generate a hot plug signal HPD#2 high level input to the embedded controller IT8528 (U6). After U6GPIO1 PIN detects the high level, it outputs GPIO2 low level to ASW3642 (U3) SEL PIN. After U3 detects the SELPIN low level, it switches the HDMI1 display channel of Loongson 7A2000 (U1) to CS5801 (U4) and then converts the DPX4 signal to ANX7447 (U5). U5 then gives it to the DP monitor on the Type-C interface for display output.

[0027] In addition, when neither the HDMI Type-A interface nor the Type-C interface is connected to any display, IT8528 (U6) outputs GPIO2 high level by default, that is, HDMI1 is switched to the HDMI Type-A interface by default. That is to say, in this preferred embodiment, when neither the first detection port nor the second detection port of the embedded controller detects the connection of an external display, the embedded controller outputs a selection signal to the multiplexer / demultiplexer to control the third I / O port of the multiplexer / demultiplexer to connect to its first I / O port to transmit the HDMI signal.

[0028] When both the HDMI Type-A interface and the Type-C interface are connected to monitors, IT8528(U6) will check which interface is connected to the device first and switch the HDMI1 display channel to that interface first. That is to say, when both the first detection port and the second detection port of the embedded controller detect that an external monitor is connected, the embedded controller outputs a selection signal to the multiplexer / demultiplexer in the order in which the external monitors are connected to control the first I / O port of the multiplexer / demultiplexer to connect to the external monitor that is connected first to transmit the HDMI signal.

[0029] In summary, the portable computer based on the Loongson platform of the present invention supports built-in high-definition screen display, HDMI Type-A interface extended display, and Type-C interface DP display, which brings extremely high application experience and convenience to users of Loongson platform portable computers.

[0030] As described above, for ordinary technicians in this field, various other corresponding changes and modifications can be made based on the technical solutions and technical concepts of the present invention, and all these changes and modifications should fall within the protection scope of the appended claims of the present invention.

Claims

1. A portable computer based on the Loongson platform, characterized in that: include: The invention relates to an LS7A2000 chip as a supporting bridge chip for the Loongson processor, an HDMI to EDP chip, a built-in display, a multiplexer / demultiplexer, an HDMI to DP chip, an intelligent high-speed bus switch, an HDMI Type-A interface, a Type-C interface, and an embedded controller; the HDMI to EDP chip is electrically connected between the first HDMI interface of the LS7A2000 chip and the built-in display; the second HDMI interface of the LS7A2000 chip is electrically connected to the first I / O port of the multiplexer / demultiplexer, the HDMI to DP chip is electrically connected between the second I / O port of the multiplexer / demultiplexer and the first I / O port of the intelligent high-speed bus switch, and the third I / O port of the multiplexer / demultiplexer is electrically connected to the HDMI Type-A interface so as to be able to connect to an external HDMI The display, the USB3.0 interface of the LS7A2000 chip is electrically connected to the second I / O port of the intelligent high-speed bus switch, the third I / O port of the intelligent high-speed bus switch is electrically connected to the Type-C interface so as to be able to connect an external DP display or a device supporting the USB protocol; the first detection port of the embedded controller is electrically connected to the HDMI Type-A interface to detect the hot plug signal generated by the HDMI display being connected to the HDMI Type-A interface, the second detection port of the embedded controller is electrically connected to the intelligent high-speed bus switch to detect the hot plug signal generated by the DP display being connected to the Type-C interface, the embedded controller generates a selection signal according to the detected access status of the external display, the output end of the embedded controller is electrically connected to the multiplexer / demultiplexer to output the selection signal thereto, and the multiplexer / demultiplexer controls one of its second I / O port and the third I / O port to be connected to its first I / O port according to the selection signal to transmit the HDMI signal.

2. The portable computer based on the Loongson platform as claimed in claim 1, characterized in that: When neither the first detection port nor the second detection port of the embedded controller detects the connection of an external display, the embedded controller outputs a selection signal to the multiplexer / demultiplexer to control the third I / O port of the multiplexer / demultiplexer to connect with its first I / O port to transmit an HDMI signal.

3. The portable computer based on the Loongson platform as claimed in claim 1, characterized in that: When both the first detection port and the second detection port of the embedded controller detect that an external display is connected, the embedded controller outputs a selection signal to the multiplexer / demultiplexer in the order in which the external displays are connected to control the first I / O port of the multiplexer / demultiplexer to connect to the external display connected first to transmit the HDMI signal.

4. The portable computer based on the Loongson platform as claimed in claim 1, characterized in that: The HDMI to EDP chip is MT9700.

5. The portable computer based on the Loongson platform as claimed in claim 1, characterized in that: The multiplexer / demultiplexer is ASW3642.

6. The portable computer based on the Loongson platform as claimed in claim 1, characterized in that: The HDMI to DP chip is CS5801.

7. The portable computer based on the Loongson platform as claimed in claim 1, characterized in that: The intelligent high-speed bus switch is ANX7447.

8. The portable computer based on the Loongson platform as claimed in claim 1, characterized in that: The embedded controller is IT8528.

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