Thomas Zimmermann tzimmermann@suse.de writes:
Use the helper screen_info_video_type() to get the framebuffer type from struct screen_info. Handle supported values in sorted switch statement.
Reading orig_video_isVGA is unreliable. On most systems it is a VIDEO_TYPE_ constant. On some systems with VGA it is simply set to 1 to signal the presence of a VGA output. See vga_probe() for an example. Retrieving the screen_info type with the helper screen_info_video_type() detects these cases and returns the appropriate VIDEO_TYPE_ constant. For VGA, sysfb creates a device named "vga-framebuffer".
The sysfb code has been taken from vga16fb, where it likely didn't work correctly either. With this bugfix applied, vga16fb loads for compatible vga-framebuffer devices.
Reviewed-by: Javier Martinez Canillas javierm@redhat.com