diff options
| author | Andres Salomon <dilinger@queued.net> | 2008-04-28 11:15:03 +0200 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2008-04-28 17:58:36 +0200 |
| commit | b6f448e99ce7955b9707ed36a46cab2c6ddf7ddc (patch) | |
| tree | 74ae26692c1fd713a0178faca99dea6761d442e8 /drivers/video/geode | |
| parent | gxfb: add power management functionality (diff) | |
| download | linux-b6f448e99ce7955b9707ed36a46cab2c6ddf7ddc.tar.xz linux-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 'drivers/video/geode')
| -rw-r--r-- | drivers/video/geode/gxfb_core.c | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/drivers/video/geode/gxfb_core.c b/drivers/video/geode/gxfb_core.c index 151d964c025a..f16c21d5bc21 100644 --- a/drivers/video/geode/gxfb_core.c +++ b/drivers/video/geode/gxfb_core.c @@ -29,6 +29,7 @@ #include <linux/delay.h> #include <linux/fb.h> #include <linux/console.h> +#include <linux/suspend.h> #include <linux/init.h> #include <linux/pci.h> #include <asm/geode.h> @@ -37,6 +38,7 @@ static char *mode_option; static int vram; +static int vt_switch; /* Modes relevant to the GX (taken from modedb.c) */ static const struct fb_videomode gx_modedb[] __initdata = { @@ -382,6 +384,8 @@ static int __init gxfb_probe(struct pci_dev *pdev, const struct pci_device_id *i gxfb_check_var(&info->var, info); gxfb_set_par(info); + pm_set_vt_switch(vt_switch); + if (register_framebuffer(info) < 0) { ret = -EINVAL; goto err; @@ -502,5 +506,8 @@ MODULE_PARM_DESC(mode_option, "video mode (<x>x<y>[-<bpp>][@<refr>])"); module_param(vram, int, 0); MODULE_PARM_DESC(vram, "video memory size"); +module_param(vt_switch, int, 0); +MODULE_PARM_DESC(vt_switch, "enable VT switch during suspend/resume"); + MODULE_DESCRIPTION("Framebuffer driver for the AMD Geode GX"); MODULE_LICENSE("GPL"); |