shuai532209720 opened a new pull request #4623:
URL: https://github.com/apache/incubator-nuttx/pull/4623


   ## Summary
   This PR is to support multiple buffers, like doube buffer. Reference linux 
kernel fbmem implement.
   reference links:
   
https://github.com/torvalds/linux/blob/master/drivers/video/fbdev/core/fbmem.c
   
https://github.com/torvalds/linux/blob/master/drivers/video/fbdev/goldfishfb.c
   
   ## Impact
   This PR will not affect the manufacturer's adaptation which has implement. 
   It just provides one more interface for multiple buffer. 
   ## Testing
   It has been verified on the chip of our project.
   


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