hi,
I made a try on imX6Q Linux4.1.15 version,Rotate the screen 180 degrees. use command echo 1 > /sys/class/graphics/fb0/rotate .But the display is abnormal,Not only up and down, but also left and right.It's very confusing.So I tried to find the problem in the driver .I have found
drivers/video/fbdev/mxc/mxc_ipuv3_fb.c A corresponding parameter is passed 。I can't find the corresponding call ,but I can't find the corresponding calls and modifications that make it upside down, not left to right
Thank you for your help!