We are using Linux kernel 3.8 Jacinto 6 in our automotive rear seat entertainment platform with 2 LCD panels. we need two frame buffers /dev/fb0 and /dev/fb1. what are the Linux kernel settings to enable two display output channels.
there are also other use-case scenarios like :
1)toggle switching screen: means LCD1 and LCD2 swap the contents dynamically
2)Joint Play: this involves LCD1 and LCD2 share same contents
In our framebuffer design we want /dev/fb0 and /dev/fb1 share same physical memory and totally 4 times size of LCD resolution. 2 buffers for each panel to enable double buffers.
we assume we can use this ioctl: ioctl (fbfd, FBIOPUT_VSCREENINFO, finfo) to set the Y-Axis offset dynamically between /dev/fb0 and /dev/fb1 to achieve. but we want to kernel setting for allocating physical memory of that size and sharing between 2 display output channels. also provide more information on the design
