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authorAndres Salomon <dilinger@queued.net>2008-04-28 02:15:03 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2008-04-28 08:58:36 -0700
commitb6f448e99ce7955b9707ed36a46cab2c6ddf7ddc (patch)
tree74ae26692c1fd713a0178faca99dea6761d442e8 /drivers/video/geode
parent46fb6f110dfc3fc99f44cf701f66ea3e790b6a81 (diff)
downloadop-kernel-dev-b6f448e99ce7955b9707ed36a46cab2c6ddf7ddc.zip
op-kernel-dev-b6f448e99ce7955b9707ed36a46cab2c6ddf7ddc.tar.gz
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.c7
1 files changed, 7 insertions, 0 deletions
diff --git a/drivers/video/geode/gxfb_core.c b/drivers/video/geode/gxfb_core.c
index 151d964..f16c21d 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");
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