Jean-Sébastien Pédron 76e2f97656 vt(4): Add support to "downgrade" from eg. vt_fb to vt_vga ... The main purpose of this feature is to be able to unload a KMS driver. When going back from the current vt(4) backend to the previous backend, the previous backend is reinitialized with the special VDF_DOWNGRADE flag set. Then the current driver is terminated with the new "vd_fini" callback. In the case of vt_fb and vt_vga, this allows the former to pass the vgapci device vt_fb used to vt_vga so the device can be rePOSTed. Differential Revision: https://reviews.freebsd.org/D687		2015-03-01 12:54:22 +00:00
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efifb	Partially revert "vt: register the memory regions used by the vt drivers"	2014-12-30 08:50:07 +00:00
fb	vt(4): Add support to "downgrade" from eg. vt_fb to vt_vga	2015-03-01 12:54:22 +00:00
ofwfb	Remove stray whitespaces.	2014-09-12 14:07:20 +00:00
vga	vt(4): Add support to "downgrade" from eg. vt_fb to vt_vga	2015-03-01 12:54:22 +00:00