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| author | Andres Salomon <dilinger@queued.net> | 2008-04-28 02:15:03 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2008-04-28 08:58:36 -0700 |
| commit | b6f448e99ce7955b9707ed36a46cab2c6ddf7ddc (patch) | |
| tree | 74ae26692c1fd713a0178faca99dea6761d442e8 /Documentation/fb | |
| parent | 46fb6f110dfc3fc99f44cf701f66ea3e790b6a81 (diff) | |
| download | lwn-b6f448e99ce7955b9707ed36a46cab2c6ddf7ddc.tar.gz lwn-b6f448e99ce7955b9707ed36a46cab2c6ddf7ddc.zip | |
PM/gxfb: add hook to PM console layer that allows disabling of suspend VT switch
Prior to suspend, we allocate and switch to a new VT; after suspend, we switch
back to the original VT. This can be slow, and is completely unnecessary if
the framebuffer we're using can restore video properly.
This adds a hook that allows drivers to select whether or not to do this vt
switch, and changes the gxfb driver to call this hook. It also adds a module
param to gxfb to allow controlling of the vt switch (defaulting to no switch).
(Note: I'm not convinced that console_sem is the best way to protect this, but
we should probably have some form of locking..)
[akpm@linux-foundation.org: build fix]
Signed-off-by: Andres Salomon <dilinger@debian.org>
Cc: Jordan Crouse <jordan.crouse@amd.com>
Cc: "Antonino A. Daplas" <adaplas@pol.net>
Cc: Pavel Machek <pavel@ucw.cz>
Cc: "Rafael J. Wysocki" <rjw@sisk.pl>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'Documentation/fb')
| -rw-r--r-- | Documentation/fb/gxfb.txt | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/Documentation/fb/gxfb.txt b/Documentation/fb/gxfb.txt index b56096142017..2f640903bbb2 100644 --- a/Documentation/fb/gxfb.txt +++ b/Documentation/fb/gxfb.txt @@ -45,7 +45,8 @@ Accepted options: mode_option - specify the video mode. Of the form <x>x<y>[-<bpp>][@<refresh>] vram - size of video ram (normally auto-detected) - +vt_switch - enable vt switching during suspend/resume. The vt + switch is slow, but harmless. -- Andres Salomon <dilinger@debian.org> |