[Intel-gfx] Disabling a second monitor while in frame buffer

[Daniel Vetter]

On Tue, Dec 11, 2012 at 5:21 PM, Jesse Barnes <jbarnes at virtuousgeek.org> wrote:
> drm_fb_helper_parse_command_line in drm_fb_helper.c is where we set the
> flags based on the command line params.  drm_fb_helper_initial_config
> is what sets up the initial fbcon configuration; it might be best to
> add a new command line param to control its behavior, rather than
> trying to add some new flags to the connector that only apply to the fb
> layer...

I think a new connector->disable_fbdev flag or something which
initial_config would check seems sensible. If you further overload
->force you need to check implications all over the place, and we've
had a few funny bugs around connector forcing already (e.g. flip-flop
when force fights against the poll helper, or unnecessary polling and
similar madness). So better leave that as-is.

Other option is to add a module option to the helper module to
restrict to internal panels, i.e. connector type eDP || LVDS.
-Daniel
-- 
Daniel Vetter
Software Engineer, Intel Corporation
+41 (0) 79 365 57 48 - http://blog.ffwll.ch