CN117061795A - System and method for adaptively refreshing EDID of channel interface along with resolution of display window - Google Patents
System and method for adaptively refreshing EDID of channel interface along with resolution of display window Download PDFInfo
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- 238000013523 data management Methods 0.000 claims description 21
- 238000005192 partition Methods 0.000 claims description 20
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- 238000001514 detection method Methods 0.000 claims description 8
- 238000009825 accumulation Methods 0.000 claims description 6
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- IWNWLPUNKAYUAW-UHFFFAOYSA-N Ethylendiamine dihydroiodide Chemical compound I.I.NCCN IWNWLPUNKAYUAW-UHFFFAOYSA-N 0.000 description 2
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/20—Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
- H04N21/23—Processing of content or additional data; Elementary server operations; Server middleware
- H04N21/236—Assembling of a multiplex stream, e.g. transport stream, by combining a video stream with other content or additional data, e.g. inserting a URL [Uniform Resource Locator] into a video stream, multiplexing software data into a video stream; Remultiplexing of multiplex streams; Insertion of stuffing bits into the multiplex stream, e.g. to obtain a constant bit-rate; Assembling of a packetised elementary stream
- H04N21/23602—Multiplexing isochronously with the video sync, e.g. according to bit-parallel or bit-serial interface formats, as SDI
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G5/00—Control arrangements or circuits for visual indicators common to cathode-ray tube indicators and other visual indicators
- G09G5/36—Control arrangements or circuits for visual indicators common to cathode-ray tube indicators and other visual indicators characterised by the display of a graphic pattern, e.g. using an all-points-addressable [APA] memory
- G09G5/39—Control of the bit-mapped memory
- G09G5/391—Resolution modifying circuits, e.g. variable screen formats
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G5/00—Control arrangements or circuits for visual indicators common to cathode-ray tube indicators and other visual indicators
- G09G5/36—Control arrangements or circuits for visual indicators common to cathode-ray tube indicators and other visual indicators characterised by the display of a graphic pattern, e.g. using an all-points-addressable [APA] memory
- G09G5/39—Control of the bit-mapped memory
- G09G5/393—Arrangements for updating the contents of the bit-mapped memory
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
- H04N21/4302—Content synchronisation processes, e.g. decoder synchronisation
- H04N21/4307—Synchronising the rendering of multiple content streams or additional data on devices, e.g. synchronisation of audio on a mobile phone with the video output on the TV screen
- H04N21/43076—Synchronising the rendering of multiple content streams or additional data on devices, e.g. synchronisation of audio on a mobile phone with the video output on the TV screen of the same content streams on multiple devices, e.g. when family members are watching the same movie on different devices
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- Physics & Mathematics (AREA)
- Computer Hardware Design (AREA)
- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Controls And Circuits For Display Device (AREA)
Abstract
The invention discloses a system and a method for adaptively refreshing a channel interface EDID along with the resolution of a display window, wherein the system comprises the following steps: based on the display drive control device DM, an adaptive mechanism WEMapping of a display window-information source interface EDID is established, and the main recommended resolution of the information source interface EDID configured by each window is the same as the display resolution of the corresponding window under the display of various window split screen modes, so that the picture proportion imbalance of the terminal display window is avoided. The main recommended resolution of the corresponding source interface EDID is updated according to the resolution of the new corresponding display window, the source generator is informed to re-read the corresponding source interface EDID data, a proper video signal is sent out, an EDID programming method for resisting source interference is adopted, and the interference of an I2C bus by the source generator end when the DM updates the source interface EDID is prevented.
Description
Technical Field
The invention relates to the technical field of multi-window same-screen displays, in particular to a system and a method for adaptively refreshing a channel interface EDID along with resolution of a display window.
Background
The conventional display device has the functions of adjusting the partition modes of multiple display windows with the same screen, such as a single screen, a PBP, a tri-screen, a tetra-screen and the like, and each window is correspondingly configured with different information source interfaces to display different video signal sources, but usually the extended display identification data EDID of each information source interface is not changed along with the change of the partition modes of the display windows with the same screen, or all information source interfaces are updated according to the EDID of the same main recommended display resolution, so that the EDID of each information source interface corresponding to each sub window can not be updated according to the respective window display resolution, and further when the window display resolution of the display device is changed due to the change of the Screen split mode or the window resolution configured corresponding to the information source interface is changed, the proportion of video signal pictures displayed by the relevant display window can not be maintained at 1: 1. And the digital source generator (display card) with HDMI2.0 or above standard interface in the market has a feature: the source generator (display card end) unconditionally reads SCDC (SCDC) and other state data of EDIDdevice of the Slave end through the DDCI2C channel repeatedly at regular time intervals. The characteristic can interfere the video signal receiving end (display device) to use the same I2C bus channel to update the EDID module timely, so that the dynamic update of the EDID is seriously affected, even the EDID data is possibly lost, and the information source generator cannot read the extended display identification data of the display end and cannot send out video signals, thus finally causing the problem that the display device cannot display
Disclosure of Invention
The invention provides a system and a method for adaptively refreshing a channel interface EDID along with the resolution of a display window, which aim to establish an adaptation mechanism WEMapping of the display window-source interface EDID based on a display device capable of displaying different source signals in a multi-window same-screen partition, so that an extended display identification data EDID device connected with the corresponding source interface of the display device can adaptively update main recommendation resolution data when the resolution of the configured corresponding display window changes, and the extended display identification data EDID device can adaptively update the main recommendation resolution data according to the D main EDID data when the resolution of the display device changes by an EDID programming method PE resisting source interference, so that the problem that the display device can realize the display of any proportion of video signals according to any video signal display frame 1 when the resolution of the video signal is timely adjusted and the video signal is displayed when the display device changes the window mode, wherein the window resolution of the window is configured by the multi-display window and the screen partition, or the window resolution of two different display resolutions is exchanged between the windows is solved: 1, maintaining the best picture scale effect.
A system for channel interface EDID adaptive refresh with display window resolution, comprising: the system comprises a display drive control device DM and a control system, wherein an adaptation mechanism WEMapping with a display window-information source interface is established based on the display drive control device DM;
the display drive control device DM includes
An integrated display driving controller D10;
the input control module D20 can provide input operation, and can realize UI control behaviors such as setting of the window information source data control package pWinInputCRL and a display window information source input interface by combining an OSD interface;
a storage module D30, where the storage module D30 is responsible for storing a driver, an operation parameter, variable data, and the like of the display driving control device DM;
a display screen D40;
I2C protocol-based storage modules D501-D50 m.
Further, the control system comprises;
the micro controller MCUD100 is responsible for running a software flow and controlling the driving of each module by the micro controller MCUD 100;
the display window management module D101, wherein the display window management module D101 is responsible for the distribution of display window modes, the configuration of an information source interface and the relay processing after the information source signal is received;
the digital signal source receiving module D102 is responsible for detecting and receiving signal source signals of all signal source interfaces and controlling the EDDI 2CPath SW switch and the hot plug-in channel HPD;
An OSD driving module D103, where the OSD driving module D103 is responsible for driving, displaying and managing a UI, and the terminal signal output module D104 is responsible for driving and transmitting video signals and OSD interface signals of the D101 and the D103 to the display screen D40;
a terminal signal output module D104;
the display window management module D101 can support n window split screen display, and the digital information source receiving module is provided with m digital signal input interfaces DIP 1-DIPm.
The advanced method is characterized in that the adaptive mechanism WEMapping of the display window-information source interface EDID comprises the following steps of;
the window information source data management and control package pWinInputCRL is used for controlling data transmission and processing between a window and an information source, and ensuring that information source data is correctly displayed on the window;
the method comprises the steps that a window same-screen partition display mode Screen split mode is used for determining a window partition display mode of a display, and the DM can divide a screen into the number of divided windows according to the Screen split mode;
window dividing number WinCnt, wherein the window dividing number WinCnt indicates the number of windows which can be simultaneously displayed in the DM and can be set into different window numbers according to the requirement;
A window location information packet pDPPOSIRes containing a window display resolution value, wherein the window location information packet pDPPOSIRes is used for recording the display resolution value and the position information of each window, so as to ensure that the window can be correctly displayed on a screen;
a window-information source interface table WinSrcTbl, wherein the window-information source interface table WinSrcTbl is used for recording information source interfaces corresponding to each window and ensuring that the windows can correctly receive information source data;
the source interface EDID data buffer adaptation array table pEDIDAdpTbl is used for storing the buffer data of each source interface and ensuring that the source data can be correctly transmitted to the window;
the information source interface EDID cache data programming state marking group EDIDCHgFlagTbl is used for marking the programming state of each information source interface cache data and ensuring that the data can be correctly written into the cache.
After a display drive control device DM is powered on, each item value of a preset window source data management and control packet pWinInputCRL is read from a storage module D30, and according to the acquired window source data management and control packet pInputCRL, window division number WinCnt, window area bit information packet pDPPOSIRes [0] containing a window display resolution value, window area bit information packet pDPPOSIRes [ n-1] containing a window display resolution value, window-source interface table WinSrcTbl [0] to window-source interface table WinSrcTbl [ n-1], source interface EDID data cache adaptation array table pEDADADPTbl [0] to source interface D data cache adaptation array table DIDPTbl [ m-1], a source interface D data programming state flag group DAEDI [ EDI ] is configured to the window, wherein the following steps include configuring the window display of the window interface, the display of the window display drive control device DM;
The obtained window dividing window number WinCnt determines the window number on the display device;
the obtained window area location information packet pDPPOSIRes [0] containing the window display resolution value to the window area location information packet pDPPOSIRes [ n-1] containing the window display resolution value determine the position and the resolution of each window;
the acquired window-information source interface table WinSrcTbl [0] -window-information source interface table WinSrcTbl [ n-1] determines information source input interfaces of all windows;
the acquired source interface EDID data cache adaptation array table pEDIDADPTbl [0] -source interface EDID data cache adaptation array table pEDIDADPTbl [ m-1] determines the EDID data set of each source interface;
the acquired information source interface EDID cache data programming state mark group EDDChgFlagTbl [0 ]. The information source interface EDID cache data programming state mark group EDDChgFlagTbl [ m-1] determines which information source interfaces EDID data need to be updated.
After any one of the source interfaces EDID is updated successfully, the DM detects the thpglyTime timing time in real time, and when the thpglyTime timing is finished, the HPD high level state of the corresponding source interface is restored to inform the corresponding source generator to re-read the electrically connected source interface EDID data, so that the adapted video source signal can be sent out with the resolution of the new window.
Further, any one of the display windows a (a(1, n)) configuring one of said source interfaces WinSrcTbl [ a ]]The information source interface WinSrcTbl [ a ]]Corresponding EDID data buffer adaptation array pointer pEDIDAdpTbl [ DIP_c ]] （DIP_c(1, m)), said pEDIDAdpTbl [ DIP_c ]]EDID adaptation data array EDIDADPTbl [ DIP_c ] with one byte size of EDIDSize]The EDIDADPTbl [ DIP_c ]]The data in the array is consistent with the EDID data burnt in the EDID_DEV_c storage unit electrically connected with the information source interface DIP_c. And, the EDIDADPTbl [ c ]]The main recommended display resolution represented in the data is consistent with the display resolution (H_axV_a) of the display window a, and the source picture proportion displayed by each display window and the display window per se satisfy 1:1 fit mode.
Further, when the window of the display drive control device DM is changed in the same screen partition display mode Screen split mode, or the information source input interface of the display window configuration is changed, orThe exchange of the information source interfaces is carried out between the display windows with different display resolutions, and then the following steps are existed: display window a1 (a 1)(1, n)) corresponding source interface is changed, window-source interface WinSrcTbl [ a1 ] ]For dip_c1, updating the source interface EDID data buffer adaptation array table petidadptbl [ c1 ] corresponding to the source interface dip_c1 according to the window display resolution (h_a x V _a1) of the display window a1]The related data and the accumulated and checked value ChksumVal of the EDID data set enable the source interface EDID data buffer adaptation array table pEDIDAdpTbl [ c1 ]]The main recommended display resolution of the data representation is consistent with the resolution of the display window a1, and the information source interface EDID cache data programming state mark group EDIDCHgFlagTbl [ c1 ] is set up at the same time]The updated data cache adaptation array table pEDIDAdpTbl [ c1 ] is written by the EDID programming method PE for informing the anti-information source interference]The EDID data of (c) is programmed into an edid_dev_dip_c1 storage unit connected to dip_c1, and the source generator electrically connected to dip_c1 is informed to read the display resolution attribute characteristics of the dip_c1 source interface again by the way of breaking HPD, so as to send a video signal with resolution (h_a x V _a1) to the dip_c1 source interface of the display driving control device DM, so that the display driving control device DM receives the video signal through dip_c1 and then forms 1 on the a1 window: 1 display original video picture image, configuration of display window a1 and information source interface [ a1 ] ]Associated, and source interface [ a1 ]]Corresponding to an EDID data cache adaptation array [ c1 ]]A pointer.
The advanced EDID programming method PE for resisting the information source interference comprises the following steps: contains an input argument packet pInputRARA and a write function status return value rtn _wr. The input parameter comprises a source interface DIP_fp, an extended display identifying data table EDIDTtbl_fp for indicating the display capability of the source interface, and a time value tHPDLowTime_fp for indicating the duration of the soft-off state of the hot plug HPD.
PE1, reading EDID data in EDIDtbl_fp, and carrying out accumulation and checksum comparison on the data of each EDIDtbl bank;
PE2, if the accumulation and verification are judged to be successful, entering PE3, otherwise setting a write function state return value rtn _WR as FALSE and entering PE8;
PE3: determining an EDID_DEV_ C I C equipment object to be programmed according to the input parameter DIP_c; writing EDIDTbl_c data into the EDID_DEV_c;
PE4: pulling the HPD PIN of the source interface DIP_c to be in a LOW-level LOW state, setting the time counting time of a LOW-level state timer of the HPD_c according to tHPDLowTime, and starting the time counting;
PE5: turning off an i2c channel i2c_path_src switch sw_c between the source generator src_c and the edid_dev_c device, only maintaining the i2c channel i2c_path_me between the source interface dip_c and edid_dev_c;
PE6: the EDIDtbl_c data is programmed into EDID_DEV_c in an I2C mode, read-back verification is carried out, if OK, rtn _WR is set as TRUE, otherwise rtn _WR is set as FLASE;
PE7: restoring the I2C channel I2C Path SW_c connection between the source interface DIP_c and the EDID_DEV_c device;
PE8: returning a write function state return value rtn _WR; in the EDID writing method PE for resisting the source interference, when the HPD PIN of any one of the source interfaces dip_c is set to a low level state for performing hot plug-in, the thpglow representing the HPD low level state time can be independently set according to the characteristics of the source generator connected to the dip_c, and the consumed time of the process of PE 1-PE 8 must be greater than that of the source generator connected to the dip_c, so that the display device can have good compatibility when being used with a plurality of different source generators.
When the window same screen partition display mode of a window in the window source data management and control package pWinInputCRL of the display device is changed, or window resolution configured by the source interface is changed, or the source interfaces between the two windows with different display resolutions are exchanged, an extended display identification data EDID storage module connected with the corresponding source interface performs interference-free self-adaptive data update, so that the source generator connected with the corresponding source interface can timely adjust the resolution of the transmitted video signal according to data such as EDID main recommended resolution and the like when the window mode of the display device is changed, and the proportion of video signal pictures received and displayed by any display window is maintained to be 1 at any time: 1, maintaining the best picture scale effect.
Further, in the signal detection mode with the automatic switching source interface, the display window of the display device supports the automatic switching of the source interface when the source generator corresponding to the current source interface has no signal, and the automatic switching follows: the new source interface is selected, which is not configured by other current display windows, and before automatic switching, whether the main recommended resolution represented in the newly configured source interface EDID_DEV is equal to the current window display resolution is checked, if yes, the source interface is directly switched and a signal detection flow is entered, otherwise, the data representing the main recommended resolution, which is connected with the newly configured source interface, is updated to the corresponding window display resolution by the EDID programming method PE resisting source interference, and then the signal detection flow is entered.
Further, the digital signal input interface can be one or more of HDMI, DVI, DP.
Compared with the prior art, the invention has the following beneficial effects:
the invention provides a system, a method and a system for adaptively refreshing a channel interface EDID along with the resolution of a display window, which are based on a display device capable of displaying different source signals in a multi-window and same-screen partition mode, an adaptation mechanism WEMapping of the display window-source interface EDID is established to enable an extended display identification data EDID module connected with the corresponding source interface of the display device to adaptively update main recommendation resolution data when the resolution of the configured corresponding display window changes, and the extended display identification data EDID module is burnt into a corresponding EDID storage device through an EDID burning method PE resistant to source interference, so that the problem that when the display device switches between multi-display window and screen partition modes or the window resolution configured by the source interface changes or the source interfaces between two windows with different display resolutions occurs, extended display identification data EDID equipment connected with the corresponding source interface carries out interference-free adaptive data update is solved, and a source generator connected with the corresponding source interface can timely adjust the sent video signal according to the main display resolution data of EDID when the window mode changes at the display device end, so as to realize any proportion of the display signals to be displayed when the video resolution of any window is maintained at any time 1:1, maintaining the best picture scale effect.
Drawings
FIG. 1 is a block diagram of the hardware of a display device of the present invention with adaptive refreshing of the channel interface EDID with the resolution of the display window;
fig. 2 is a schematic diagram of a data structure packet of a window source data management and control packet pwiniputcrl of a system and a method for adaptively refreshing a channel interface EDID along with resolution of a display window according to the present invention;
FIG. 3 is a main control flow chart of a WEMapping mechanism of the adaptive display window-source interface EDID of the system and method for adaptively refreshing the channel interface EDID with the resolution of the display window;
fig. 4 is a subroutine control flow chart of the EDID programming method PE of the present invention for adaptively refreshing the EDID of the channel interface with the resolution of the display window;
FIG. 5 is a schematic diagram showing states of a display window-source interface and an EDID module in the full-screen single-window display mode of a system and a method for adaptively refreshing EDID of a channel interface according to resolution of the display window;
FIG. 6 is a schematic diagram showing states of each display window-source interface and EDID module under the 3-window source data management and control packet pWinInputCRL according to the system and method for adaptively refreshing the EDID of the channel interface along with the resolution of the display window;
Detailed Description
The present invention will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present invention more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Referring to fig. 1, a system for adaptively refreshing a channel interface EDID along with resolution of a display window includes a display driving control device DM and a control system, and establishes an adaptation mechanism WEMapping with a display window-source interface based on the display driving control device DM;
the display drive control device DM includes
An integrated display driving controller D10;
the input control module D20 can provide input operation, and can realize UI control actions such as setting the window information source data control package pWinInputCRL and a display window information source input interface by combining with a display drive control device DM;
a storage module D30, where the storage module D30 is responsible for storing a driver, an operation parameter, variable data, and the like of the display driving control device DM;
A display screen D40; I2C protocol-based storage modules D501-D50 m have the advantages of being simple in connection, multi-device-supported, low in power consumption, high in reliability, flexible, low in cost and the like.
In this embodiment, the control system includes;
the micro controller MCUD100 is responsible for running a software flow and controlling the driving of each module by the micro controller MCUD 100;
the display window management module D101, wherein the display window management module D101 is responsible for the distribution of display window modes, the configuration of an information source interface and the relay processing after the information source signal is received;
the digital information source receiving module D102 is responsible for detecting and receiving information source signals of all information source interfaces and controlling the EDDI 2CPath SW and the hot plug channel HPD;
an OSD driving module D103, where the OSD driving module D103 is responsible for driving, displaying and managing a UI, and the terminal signal output module D104 is responsible for driving and transmitting video signals and OSD interface signals of the D101 and the D103 to the display screen D40;
a terminal signal output module D104;
the display window management module D101 can support n window split screen display, and the digital information source receiving module is provided with m digital signal input interfaces DIP 1-DIPm.
In this embodiment, the adapting mechanism WEMapping of the display window-source interface includes;
the window information source data management and control package pWinInputCRL is used for controlling data transmission and processing between a window and an information source, and ensuring that information source data is correctly displayed on the window;
the method comprises the steps that a window same-screen partition display mode Screen split mode is used for determining a window partition display mode of a display, and the DM can divide a screen into the number of divided windows according to the Screen split mode;
window dividing number WinCnt, wherein the window dividing number WinCnt indicates the number of windows which can be simultaneously displayed in the DM, and different window numbers can be set according to the requirement;
a window location information packet pDPPOSIRes containing a window display resolution value, wherein the window location information packet pDPPOSIRes is used for recording the display resolution value and the position information of each window, so as to ensure that the window can be correctly displayed on a screen;
a window-information source interface table WinSrcTbl, wherein the window-information source interface table WinSrcTbl is used for recording information source interfaces corresponding to each window and ensuring that the windows can correctly receive information source data;
The source interface EDID data buffer adaptation array table pEDIDAdpTbl is used for storing the buffer data of each source interface and ensuring that the source data can be correctly transmitted to the window;
the information source interface EDID cache data programming state marking group EDIDCHgFlagTbl is used for marking the programming state of each information source interface cache data and ensuring that the data can be correctly written into the cache.
Referring to fig. 2, the window source data management and control packet pwiniputcrl includes: the window same-screen partition display mode comprises a screen split mode, a window division window number WinCnt, a window-source interface table WinSrcTbl, a source interface EDID cache data programming state mark group EDIDCHgFlagTbl, a source interface EDID data cache adaptation array table pEDIDAdpTbl and a window area bit information packet pDCWPosiRes;
referring to fig. 2-3, a method for adaptively refreshing channel interface EDID along with resolution of a display window includes the following steps
P1, after the display drive control device DM is powered on and started, firstly reading all data in a preset window source data management and control packet pWinlnpUTCRL from a storage module D30, respectively configuring the zone size and the source interface of each display window according to ScreenSplitMode, winCnt, pDWPosiRes [0] to pDOWPOSIRes [ n-1], winsrcTb [0] to WinsrcTb [ n-1] in the window source data management and control packet pWindnputCRL, and respectively writing pEDIdpTb [0] to pEDIDPTbl [ m-1] into EDID_DEV_1 to D_DEV_m through the subprogram PE according to the to-be-programmed state of EDICDChgFlagTbl [0] to EDIDDChgFlagTb [ m-1 ];
P11, carrying out configuration of windows, information source interfaces and information source interfaces EDID on each display window, wherein the method comprises the following steps;
the obtained window dividing window number WinCnt determines the window number on the display device;
the obtained window area location information packet pDPPOSIRes [0] containing the window display resolution value to the window area location information packet pDPPOSIRes [ n-1] containing the window display resolution value determine the position and the resolution of each window. Further, the acquired window positions comprise window horizontal starting positions sDW.x and window vertical starting positions sDW.y, and the acquired resolutions comprise window horizontal starting positions sDW.H and window horizontal starting positions sDW.V;
the acquired window-information source interface table WinSrcTbl [0] -window-information source interface table WinSrcTbl [ n-1] determines information source input interfaces of all windows
The acquired source interface EDID data cache adaptation array table pEDIDADPTbl [0] -source interface EDID data cache adaptation array table pEDIDADPTbl [ m-1] determines the EDID data set of each source interface;
the acquired information source interface EDID cache data programming state mark group EDDChgFlagTbl [0 ]. The information source interface EDID cache data programming state mark group EDDChgFlagTbl [ m-1] determines which information source interfaces EDID data need to be updated.
P2, the display driving control device DM displays the corresponding video signal picture in the current Screen split mode and in the best resolution display mode of 1:1 proportion through each display window
P21, any of the display windows a (a(1, n)) configuring one of said source interfaces WinSrcTbl [ a ]]The information source interface WinSrcTbl [ a ]]Corresponding EDID data buffer adaptation array pointer pEDIDAdpTbl [ DIP_c ]] （DIP_c(1, m)), said pEDIDAdpTbl [ DIP_c ]]EDID adaptation data array EDIDADPTbl [ DIP_c ] with one byte size of EDIDSize]The EDIDADPTbl [ DIP_c ]]The data in the array is consistent with the EDID data burnt in an EDID_DEV_c storage unit electrically connected with the information source interface DIP_c, and the EDIDADPTbl [ c ]]The main recommended display resolution represented in the data is consistent with the display resolution (H_axV_a) of the display window a, and the source picture proportion displayed by each display window and the display window per se satisfy 1:1 fit mode;
p22, any of the display windows a (a(1, n)) is configured as the source interface [ a ]]The information source interface [ a ]]Corresponding EDID data buffer adaptation array pointer +.>（DIP_c/>(1, m)), said data cache adaptation array +.>EDID data buffer adaptation array with pointed byte size of EDIDSize >The data cache adaptation array +.>The data in the interface and the information source interface are burnt in->The EDID data in the electrically connected edid_dev_c storage unit is identical. And, the data cache adaptation array table [ c ]]The main recommended display resolution represented in the data and the display resolution (H_ axV _a) of the display window a cause the source picture proportion displayed by each display window and the display window to satisfy 1:1 fit mode, configuration of display window a and source interface [ a ]]Associated, and source interface [ a ]]Corresponding to an EDID data buffer adaptation array [ a ]]A pointer;
p3, detecting whether the window same-screen partition display mode Screen split mode is changed, whether the information source input interface configured by the display window is changed, and exchanging information source interfaces among the display windows with different display resolutions;
p31, if the display window with changed display resolution is changed, the information source interfaces configured by all display windows with changed display resolution are respectively updated according to the corresponding display window resolution, the related data representing the main recommended resolution is updated according to the display window resolution which corresponds to the display window with changed display resolution, so that the resolution of the main recommended display resolution of each related information source interface is consistent with the resolution of the display window which corresponds to the display window with changed display resolution, and the EDID cache data programming state mark EDIDCHGFlagTbl0 of the related information source interface is arranged;
P32, when it is detected that the window source data management packet pWinInputCRL of the display drive control device DM is changed, or the source input interface of the display window configuration is changed, or the source interfaces are exchanged between the display windows with different display resolutions, the following exists: display window a1 (a 1)(1, n)) corresponding source interfaces are changed;
p33, a window-source interface WinSrcTbl [ a1] is DIP_c1, the window-source interface WinSrcTbl updates the related data and the accumulated and checked value ChksumVal of an information source interface EDID data cache adaptation array table pEDIDPTbl [ c1] EDID data set corresponding to an information source interface DIP_c1 according to the window display resolution (H_a1 x V _a1) of the display window a1, enables the main recommended display resolution of the information source interface EDID data cache adaptation array table pEDIDPTbl [ c1] data representation to be consistent with the resolution of the display window a1, simultaneously sets the information source interface EDID cache data writing state mark group EDIDCHgFlagTbl [ c1], the updated EDID data of the data buffer adaptation array table pEDIDAdpTbl [ c1] is programmed into an EDID_DEV_DIP_c1 storage unit connected with the DIP_c1 by an EDID programming method PE for informing the source interference resistance, and a source generator electrically connected with the DIP_c1 is informed to read the display resolution attribute characteristics of the DIP_c1 source interface again by the mode of cutting off the HPD, so that a video signal with the resolution of (H_a1 x V _a1) can be sent to the DIP_c1 source interface of the display driving control device DM, and the display driving control device DM receives the video signal through the DIP_c1 and then generates a1 on the a1 window: 1, displaying an original video picture image, wherein the configuration of a display window a1 is associated with an information source interface [ a1], and the information source interface [ a1] corresponds to an EDID data cache adaptation array [ c1] pointer;
P34, when window same screen partition display mode Screen split mode in the window source data management and control package pWinInputCRL of the display device is changed, or window resolution configured by the source interface is changed, or the source interfaces between two windows with different display resolutions are exchanged, the extended display identification data EDID storage module connected with the corresponding source interface performs interference-free self-adaptive data update, so that the source generator connected with the corresponding source interface can timely adjust the resolution of the transmitted video signal according to data such as EDID main recommended resolution and the like when the window mode change occurs at the display device end, and the proportion of video signal pictures received and displayed by any arbitrary display window is maintained to be 1:1, maintaining the optimal picture proportion effect;
p4, detecting the state of the EDIDCHGFlagTbl [0] to EDIDCHGFlagTb|m-1 of the data programming marks of the EDID cache of each information source interface in a round, and detecting whether pEDIDAdpTbl to be programmed exists or not;
p5, if pEDIDAdpTbl to be programmed exists, entering an EDID programming subroutine PE to perform programming treatment on the data;
p6, after the pEDIDAdpTbl is successfully programmed, waiting for the tHPDLowTime timing to finish restoring the HPD high level state so as to inform the information source generator terminal to read the EDID data again, and sending out a video information source signal with the resolution of a new window;
P61, after any source interface EDID is updated successfully, the DM detects the tHPDLowTime timing time in real time, and when the tHPDLowTime timing is finished, the HPD high level state of the corresponding source interface is restored to inform the corresponding source generator to re-read the electrically connected source interface EDID data, and an adaptive video source signal is sent out with the resolution of a new window.
In this embodiment, in a display mode with an automatically switched source interface, the display window of the display device supports automatic switching of the source interface when the source generator corresponding to the current source interface has no signal, and the automatic switching follows: the selection of the new source interface is not necessarily the source interface in the configuration of other display windows at present, and before automatic switching, it is checked whether the main recommended resolution represented in the newly configured source interface edid_dev is equal to the current window display resolution, if so, it is directly switched and the signal detection flow is entered, otherwise, the data representing the main recommended resolution in the edid_dev connected with the newly configured source interface is updated to the window display resolution, and then the signal detection flow is entered.
In this embodiment, the digital signal input interface may be one or more of HDMI, DVI, DP, and the EDID storage modules D501 to D50m based on the I2C protocol may be volatile storage device RAM or non-volatile storage device EEROM. If the display device belongs to a RAM device, the buffer data writing state flag group [0] to the buffer data writing state flag group [ m-1] are unconditionally set to 1 when the display device is powered on each time, so as to inform the MCU to read out the EDID data of each information source interface stored in the storage module D30, and respectively initialize and write the EDID data to the EDID storage modules D501-D50 m, wherein the EDID storage modules D501-D50 m belong to the RAM device or the ROM device, and when the resolution of a display window configured by the connected digital information source interface changes, the EDID data with the main recommended display resolution the same as the corresponding window display resolution is updated by the EDID writing method PE with anti-information source interference.
In this embodiment, the method PE for writing EDID with anti-source interference includes: contains an input argument packet pInputRARA and a write function status return value rtn _wr. The input parameter packet pInputRARA contains a source interface dip_fp, an extended display identification data table edidtbl_fp for indicating the display capability of the source interface, and a time value thhpdlowtime_fp for indicating the duration of the soft-off state of the hot plug HPD;
PE1, reading EDID data in EDIDtbl_fp, and carrying out accumulation and checksum comparison on the data of each EDIDtbl bank;
PE2, if the accumulation and verification are judged to be successful, entering PE3, otherwise setting a write function state return value rtn _WR as FALSE and entering PE8;
PE3: determining an EDID_DEV_ C I C equipment object to be programmed according to the input parameter DIP_c; writing EDIDTbl_c data into the EDID_DEV_c;
PE4: pulling the HPD PIN of the source interface DIP_c to be in a LOW-level LOW state, setting the time counting time of a LOW-level state timer of the HPD_c according to tHPDLowTime, and starting the time counting;
PE5: turning off an i2c channel i2c_path_src switch sw_c between the source generator src_c and the edid_dev_c device, only maintaining the i2c channel i2c_path_me between the source interface dip_c and edid_dev_c;
PE6: the EDIDtbl_c data is programmed into EDID_DEV_c in an I2C mode, read-back verification is carried out, if OK, rtn _WR is set as TRUE, otherwise rtn _WR is set as FLASE;
PE7: restoring the I2C channel I2C Path SW_c connection between the source interface DIP_c and the EDID_DEV_c device;
PE8: returning a write function state return value rtn _WR; in the EDID writing method PE for resisting the information source interference, when the HPD PIN of any one of the information source interfaces dip_c is set to a low level state for performing hot plug-in, the thpglow representing the HPD low level state time can be independently set according to the characteristics of the information source generator connected with the dip_c and is greater than the time consumed by the process of PE 1-PE 8, so that the display device can have good compatibility when being matched with a plurality of different information source generators.
Example 1
Referring to fig. 5, the display terminal is a display screen with a resolution of 3840x2160, and the display device can support at most 4 display window partitions for on-screen display, and 4 digital signal source interfaces dip_1 to dip_4. In fig. 5, the window source data management and control package pWinInputCRL of the current display device is in a single window full screen display mode, only a display window win_1 exists on the display screen, the configured source interface is dip_1, the main recommended display resolution represented by the EDID data stored in the linked EDID storage units 1-4 of dip_1-dip_4 is the screen resolution (3840 x 2160), and the source generator src_1 sends out a video signal with the resolution of 3840x2160 according to the main recommended display resolution provided in the linked EDID storage unit 1, and the original ratio of 1:1 on win_1 is displayed on the display screen.
Example two
Referring to fig. 6, based on the display device in example one, when the display device window source data management packet pwlnputcrlscreensplit mode is switched from the single window display mode in example one to the three window source data management packet pwlnputcrlp 3P shown in fig. 6 by the input manipulation module and OSD module, the DM generates a display window win_1, win_2, win_3 with window spatial location and resolution of (0, 1920, 2160), (1920,0, 1920, 1080), (1920, 1080, 1920, 1080) respectively, and configures corresponding source interfaces dip_1, dip_4, dip_2 respectively, the DM will represent EDID adaptation data array [ dip_1], adaptation data array [ dip_4] with data module corresponding to the main recommended display resolution respectively, the accumulated and checked value ChksumVal of each EDID data set is updated to enable main recommended display resolutions of the data characterization of the adaptive data array [ DIP_1], the adaptive data array [ DIP_4] and the adaptive data array [ DIP_4] to be (1920, 2160), (1920, 1080) and 1920, respectively, so that the display resolutions of the windows Win_1, win_4 and Win_2 are consistent, and the DM can set the EDID cache data programming state marks EDID cache data programming state [1], EDID cache data programming state [4] and EDID cache data programming state [2] at the same time to inform the EDID cache data programming method PE subprogram resisting the information source interference of the EDID cache data programming state marks EDID cache data programming state [1], EDID cache data programming state [4] of the information source interface 1, the EDID storage unit 4, EDID storage unit 2 electrically connected by the information source interface 2, the method comprises the steps that an EDID (electronic data interchange) storage unit 2 storage module performs programming update of EDID data, hot plug actions of HPD1, HPD4 and HPD2 are respectively performed, source generators Src1, src4 and Src2 corresponding to DIP_1, DIP_4 and DIP_2 are notified to re-read main recommended display resolutions characterized in the linked EDID_DEV_1, EDID_DEV_4 and EDID_DEV_2 storage module respectively, the source generators Src1, src4 and Src2 respectively send corresponding resolution video signals video Sgl_1 (1920 x 2160), video Sgl_4 (1920 x 1080) and video Sgl_2 (1920 x 1080) according to the new main recommended display resolutions, the video signals are respectively re-read and transmitted to a digital source receiving module D102 through DIP_1, DIP_4 and DIP_2, the video signals are respectively transmitted to a Bu_1 window management module, a Win_1, a Win_2 window allocation module, a Win_1 and a Win_2 window respectively, a Bug1, a Win_2 window 1, a Win_2 window [ window 1, a Win_2 ] are respectively transmitted to a respective initial window [4, a respective window 1, a Win_2 ] are respectively formed, and a respective window 1, a respective window 2 are respectively transmitted to a respective window 1, a respective window 2 [ window 1, a respective window 2] are respectively transmitted to the respective window 1, and a respective window 2 [ window 1] are respectively: the signal picture proportion of 1 displays the video signals of the video sgl_1, the video sgl_4 and the video sgl_2.
Example III
Referring to fig. 6 and 5, based on the display device in the second example, when the input manipulation module and the OSD module are used to switch the display device window source data management packet pWinInputCRL ScreenSplitMode from the three-window source data management packet pwneiputcrlp 3P shown in fig. 6 back to the single window display mode shown in fig. 5, only win_1 is displayed on the display window, and the preset initial source interfaces are dip_1, win_2 to win_3 are logged out, and dip_4 and dip_2 are restored to the unconfigured state.
Since the display resolution of the display window win_1 is changed from (1920, 2160) back to (3840, 2160), the main recommended display resolution characterized in its corresponding edid_dev_1 is updated to (3840, 2160) by the PE subroutine, and the source generator src_1 is caused to re-read EDID by the hpd_1 hot plug signal to restore the transmitted videosgl_1 to the video signal resolution of 3840x2160, and maintain 1 on win_1: 1.
If the source generator src_1 cannot send out the video signal to the dip_1 end due to some factors, the display driver control device DM will automatically switch to the next unconfigured source interface dip_2 after the dip_1 source interface detects a certain time, and since the main recommended resolution represented in the EDID data originally stored in the edid_dev_2 linked to dip_2 is (1920, 1080), the display driver control device DM will update the main recommended display resolution represented in EDIDAdpTbl [ dip_1] to (1920, 1080), update the accumulated and checked values, burn to edid_dev_2 through the PE subroutine, and re-read EDID through the hpd_2 hot plug signal to make the sent video sgl_2 be the video signal resolution of 3840x2160, and update the video signal resolution of win_1 by 1: 1.
While the invention has been described with respect to the above embodiments, it should be noted that modifications can be made by those skilled in the art without departing from the inventive concept, and these are all within the scope of the invention.
Claims (10)
1. The system is characterized by comprising a display drive control device DM and a control system, wherein an adaptation mechanism WEMapping with a display window-information source interface is established based on the display drive control device DM;
the display driving control device DM includes an integrated display driving controller D10;
the input control module D20 can provide input operation, and can realize the UI control actions of the window information source data control packet pWinInputCRL and the display window information source input interface by combining an OSD interface;
a storage module D30, where the storage module D30 is responsible for storing a driver, an operation parameter, and variable data of the display driving control device DM;
a display screen D40;
I2C protocol-based storage modules D501-D50 m.
2. The system for adaptively refreshing a channel interface EDID with a resolution of a display window according to claim 1, wherein the integrated display driver controller D10 includes a microcontroller MCU D100, a display window management module D101, a digital signal source receiving module D102, an OSD driving module D103, and a terminal signal output module D104;
The microcontroller MCU D100 is responsible for running a software flow and controlling the driving of each module;
the display window management module D101 is responsible for the distribution of display window modes, the configuration of an information source interface and the relay processing after the information source signal is received;
the digital information source receiving module D102 is responsible for detecting and receiving information source signals of all information source interfaces and controlling an EDID I2CPath SW switch and a hot plug channel HPD;
the OSD driving module D103 is responsible for driving, displaying and managing a UI, and the terminal signal output module D104 is responsible for driving and conveying video signals and OSD interface signals of the D101 and the D103 to the display screen D40;
the display window management module D101 can support n window split screen display, the digital information source receiving module is provided with m digital signal input interfaces DIP 1-DIPm, and the digital signal input interfaces DIP 1-DIPm can be one or more of HDMI, DVI, DP.
3. The system for adaptive refresh of channel interface EDID with display window resolution of claim 1 wherein the adaptive mechanism WEMapping of display window-source interface EDID comprises:
the window information source data management and control package pWinInputCRL is used for controlling data transmission and processing between a window and an information source, and ensuring that information source data is correctly displayed on the window;
The method comprises the steps that a window same-screen partition display mode Screen split mode is used for determining a window partition display mode of a display, and the DM can divide a screen into the number of divided windows according to the Screen split mode;
window dividing number WinCnt, wherein the window dividing number WinCnt indicates the number of windows which can be simultaneously displayed in the DM and can be set into different window numbers according to the requirement;
a window location information packet pDPPOSIRes containing a window display resolution value, wherein the window location information packet pDPPOSIRes is used for recording the display resolution value and the position information of each window, so as to ensure that the window can be correctly displayed on a screen;
a window-information source interface table WinSrcTbl, wherein the window-information source interface table WinSrcTbl is used for recording information source interfaces corresponding to each window and ensuring that the windows can correctly receive information source data;
the source interface EDID data buffer adaptation array table pEDIDAdpTbl is used for storing the buffer data of each source interface and ensuring that the source data can be correctly transmitted to the window;
the information source interface EDID cache data programming state marking group EDIDCHgFlagTbl is used for marking the programming state of each information source interface cache data and ensuring that the data can be correctly written into the cache.
4. A method of implementing the resolution adaptive refresh system of claims 1-3, comprising the steps of: after the display drive control device DM is powered on and started, firstly reading all values of a preset window source data management and control packet pWinInputCRL from the storage module D30, and configuring the window display method according to the acquired window source data management and control packet pWinInputCRL, the window division window number WinCnt, a window area bit information packet pDPPOSIRes [0] -a window area bit information packet pDPPOSIRes [ n-1] containing a window display resolution value, a window-source interface table WinSrcTbl [0] -a window-source interface table WinSrcTbl [ n-1], a source interface EDIDDATbl [0] -a source interface EDID data cache adaptation array table pEDIDPTbl ], a source interface D cache data programming state flag group EDI DChGFlagTbl [0] -source interface EDID flag group EDID, wherein the window interface display method comprises the steps of configuring the window display interfaces;
The obtained window dividing window number WinCnt determines the window number on the display device;
the obtained window area location information packet pDPPOSIRes [0] containing the window display resolution value to the window area location information packet pDPPOSIRes [ n-1] containing the window display resolution value determine the position and the resolution of each window;
the acquired window-information source interface table WinSrcTbl [0] -window-information source interface table WinSrcTbl [ n-1] determines information source input interfaces of all windows;
the acquired source interface EDID data cache adaptation array table pEDIDADPTbl [0] -source interface EDID data cache adaptation array table pEDIDADPTbl [ m-1] determines the EDID data set of each source interface;
the acquired information source interface EDID cache data programming state mark group EDDChgFlagTbl [0 ]. The information source interface EDID cache data programming state mark group EDDChgFlagTbl [ m-1] determines which information source interfaces EDID data need to be updated.
5. After any one of the source interfaces EDID is updated successfully, the DM detects the thpglyTime timing time in real time, and when the thpglyTime timing is finished, the HPD high level state of the corresponding source interface is restored to inform the corresponding source generator to re-read the electrically connected source interface EDID data, so that the adapted video source signal can be sent out with the resolution of the new window.
6. The method of claim 4, wherein any of said display windows a (a(1, n)) configuring one of said source interfaces WinSrcTbl [ a ]]The information source interface WinSrcTbl [ a ]]Corresponding EDID data buffer adaptation array pointer pEDIDAdpTbl [ DIP_c ]] （DIP_c(1, m)), said pEDIDAdpTbl [ DIP_c ]]EDID adaptation data array EDIDADPTbl [ DIP_c ] with one byte size of EDIDSize]The EDIDADPTbl [ DIP_c ]]The data in the array is consistent with the EDID data burnt in the EDID_DEV_c storage unit electrically connected with the information source interface DIP_c, and the EDIDATPTbl [ c ]]The main recommended display resolution represented in the data is consistent with the display resolution (H_axV_a) of the display window a, and the source picture proportion displayed by each display window and the display window per se satisfy 1:1 fit mode.
7. The method for adaptively refreshing EDID of a channel interface with resolution of a display window according to claim 4, wherein when a window of a display driving control device DM is changed with a screen partition display mode, or a source input interface configured by a display window is changed, or the source interfaces are exchanged between the display windows with different resolutions, there is: display window a1 (a 1) (1, n)) corresponding source interface is changed, window-source interface WinSrcTbl [ a1 ]]Is DIP_c1, and is divided according to the window display of the display window a1Updating the source interface EDID data buffer adaptation array table pEDIDAdpTbl [ c1 ] corresponding to the source interface DIP_c1 by the resolution (H_a x V _a1)]The related data and the accumulated and checked value ChksumVal of the EDID data set enable the source interface EDID data buffer adaptation array table pEDIDAdpTbl [ c1 ]]The main recommended display resolution of the data representation is consistent with the resolution of the display window a1, and the information source interface EDID cache data programming state mark group EDIDCHgFlagTbl [ c1 ] is set up at the same time]The updated data cache adaptation array table pEDIDAdpTbl [ c1 ] is written by an EDID programming method PE for informing a message source interference]The EDID data of (c) is programmed into an edid_dev_dip_c1 storage unit connected to dip_c1, and the source generator electrically connected to dip_c1 is informed to read the display resolution attribute characteristics of the dip_c1 source interface again by the way of breaking HPD, so as to send a video signal with resolution (h_a x V _a1) to the dip_c1 source interface of the display driving control device DM, so that the display driving control device DM receives the video signal through dip_c1 and then forms 1 on the a1 window: 1 display original video picture image, configuration of display window a1 and information source interface [ a1 ] ]Associated, and source interface [ a1 ]]Corresponding to an EDID data cache adaptation array [ c1 ]]A pointer.
8. The method for adaptively refreshing a channel interface EDID with a resolution of a display window according to claim 4, wherein the method PE for writing EDID resistant to source interference comprises: contains an input argument packet pInputRARA and a write function status return value rtn _wr. The input parameter packet pInputRARA contains a source interface dip_fp, an extended display identification data table edidtbl_fp for indicating the display capability of the source interface, and a time value thhpdlowtime_fp for indicating the duration of the soft-off state of the hot plug HPD;
PE1, reading EDID data in EDIDtbl_fp, and carrying out accumulation and checksum comparison on the data of each EDIDtbl bank;
PE2, if the accumulation and verification are judged to be successful, entering PE3, otherwise setting a write function state return value rtn _WR as FALSE and entering PE8;
PE3: determining an EDID_DEV_ C I C equipment object to be programmed according to the input parameter DIP_c; writing EDIDTbl_c data into the EDID_DEV_c;
PE4: pulling the HPD PIN of the source interface DIP_c to be in a LOW-level LOW state, setting the time counting time of a LOW-level state timer of the HPD_c according to tHPDLowTime, and starting the time counting;
PE5: turning off an i2c channel i2c_path_src switch sw_c between the source generator src_c and the edid_dev_c device, only maintaining the i2c channel i2c_path_me between the source interface dip_c and edid_dev_c;
PE6: the EDIDtbl_c data is programmed into EDID_DEV_c in an I2C mode, read-back verification is carried out, if OK, rtn _WR is set as TRUE, otherwise rtn _WR is set as FLASE;
PE7: restoring the I2C channel I2C Path SW_c connection between the source interface DIP_c and the EDID_DEV_c device;
PE8: returning a write function state return value rtn _WR; in the EDID writing method PE for resisting the source interference, when the HPD PIN of any one of the source interfaces dip_c is set to a low level state for performing hot plug-in, the thpglow representing the HPD low level state time can be independently set according to the characteristics of the source generator connected to the dip_c, and the consumed time of the process of PE 1-PE 8 must be greater than that of the source generator connected to the dip_c, so that the display device can have good compatibility when being used with a plurality of different source generators.
9. The method for adaptively refreshing the channel interface EDID along with the resolution of a display window according to claim 4, wherein when the window and screen partition display mode of a window in a display device window source data management and control package pWinInputCRL changes, or the window resolution configured by a source interface changes, or the source interfaces between two windows with different display resolutions exchange, an extended display identification data EDID storage module connected with the corresponding source interface performs interference-free adaptive data update, so that a source generator connected with the corresponding source interface can timely adjust the resolution of a video signal sent according to data such as EDID main recommended resolution when the window mode changes at the display device end, thereby realizing that the proportion of video signal pictures received and displayed by any display window at any time maintains 1:1, maintaining the best picture scale effect.
10. The method of claim 4, wherein in a signal detection mode with an automatically switched source interface, the display device display window supports automatic switching of the source interface when no signal is generated from the source generator corresponding to the current source interface, and the automatic switching follows: the new source interface is selected, which is not configured by other current display windows, and before automatic switching, whether the main recommended resolution represented in the newly configured source interface EDID_DEV is consistent with the current window display resolution is checked, if so, the source interface is directly switched and enters a signal detection flow, otherwise, the data representing the main recommended resolution, which is connected with the newly configured source interface, is updated to the corresponding window display resolution through the EDID programming method PE resisting source interference, and then enters a signal detection flow.
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