Linux Device Drivers Development

Putting it all together

In this section, let us summarize the things discussed in the preceding section. In order to write framebuffer driver, you have to do the following:

1. Fill a struct fb_var_screeninfo structure in order to provide information on framebuffer variable properties. Those properties can be changed by user space.
2. Fill a struct fb_fix_screeninfo structure, to provide fixed parameters.
3. Set up a struct fb_ops structure, providing necessary callback functions, which will used by the framebuffer subsystem in response to user actions.
4. Still in the struct fb_ops structure, you have to provide accelerated functions callback, if supported by the device.
5. Set up a struct fb_info structure, feeding it with structures filled in the previous ...