shuai532209720 commented on a change in pull request #4623:
URL: https://github.com/apache/incubator-nuttx/pull/4623#discussion_r719054910



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File path: include/nuttx/video/fb.h
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@@ -283,6 +283,10 @@
 #define FBIOGET_FRAMERATE     _FBIOC(0x0015)  /* Get frame rate
                                                * Argument:            int* */
 
+#define FBIOPAN_DISPLAY       _FBIOC(0x0020)  /* Pan display

Review comment:
       New interfaces for specific controls may be added in the future. And 
FBIOPAN_DISPLAY don't belong spcific controls, so there's some space left over. 
What do you think? 




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