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fbcon: allow fbcon to use the primary display driver

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Allow fbcon to select the primary display adapter using the
fb_is_primary_device() arch-specific helper.  If a a primary adapter is
detected, fbcon will unbind the old adapter from the VT layer, then rebind
using the new adapter.  This requires that bind_/unbind_con_driver() be made
public.

Because this feature may produce unexpected behavior (from the user's POV),
this must be explicitly enabled in Kconfig.

[akpm@linux-foundation.org: export unbind_con_driver]
Signed-off-by: Antonino Daplas <adaplas@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Antonino A. Daplas 2007-07-17 04:05:28 -07:00 • committed by Linus Torvalds
parent 317b3c2167
commit 623e71b035
5 changed files with 102 additions and 14 deletions
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4
include/linux/vt_kern.h
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@ -75,6 +75,10 @@ int con_copy_unimap(struct vc_data *dst_vc, struct vc_data *src_vc);
int vt_waitactive(int vt);
void change_console(struct vc_data *new_vc);
void reset_vc(struct vc_data *vc);
extern int bind_con_driver(const struct consw *csw, int first, int last,
int deflt);
extern int unbind_con_driver(const struct consw *csw, int first, int last,
int deflt);
/*
* vc_screen.c shares this temporary buffer with the console write code so that