summaryrefslogtreecommitdiff
path: root/drivers/platform
diff options
context:
space:
mode:
authorAlan Jenkins <alan-jenkins@tuffmail.co.uk>2009-12-03 10:45:15 +0300
committerLen Brown <len.brown@intel.com>2009-12-09 23:54:33 +0300
commit325fb8e9aeddf7bf8a7a892869dca00e7305c41e (patch)
tree7171a806baf28188a576b95a5682d19dc783877e /drivers/platform
parentf90be874303eddc53c199083a37bc44d65ab8351 (diff)
downloadlinux-325fb8e9aeddf7bf8a7a892869dca00e7305c41e.tar.xz
eeepc-laptop: re-add check for eeepc->backlight == NULL
As Corentin points out, we do not create a backlight device if the ACPI video driver is able to provide equivalent functionality. So we do need to check before we try to update the backlight device. We now ignore brightness events completely if we have not created a backlight device. This is slightly more cautious than the original check. Signed-off-by: Alan Jenkins <alan-jenkins@tuffmail.co.uk> Signed-off-by: Len Brown <len.brown@intel.com>
Diffstat (limited to 'drivers/platform')
-rw-r--r--drivers/platform/x86/eeepc-laptop.c42
1 files changed, 25 insertions, 17 deletions
diff --git a/drivers/platform/x86/eeepc-laptop.c b/drivers/platform/x86/eeepc-laptop.c
index 5f0eb767e8a6..d07a4c0ec7e9 100644
--- a/drivers/platform/x86/eeepc-laptop.c
+++ b/drivers/platform/x86/eeepc-laptop.c
@@ -1230,27 +1230,35 @@ static void eeepc_acpi_notify(struct acpi_device *device, u32 event)
dev_name(&device->dev), event,
count);
+ /* Brightness events are special */
if (event >= NOTIFY_BRN_MIN && event <= NOTIFY_BRN_MAX) {
- int old_brightness, new_brightness;
- /* Update backlight device. */
- old_brightness = eeepc_backlight_notify(eeepc);
-
- /* Convert brightness event to keypress (obsolescent hack). */
- new_brightness = event - NOTIFY_BRN_MIN;
-
- if (new_brightness < old_brightness) {
- event = NOTIFY_BRN_MIN; /* brightness down */
- } else if (new_brightness > old_brightness) {
- event = NOTIFY_BRN_MAX; /* brightness up */
- } else {
- /*
- * no change in brightness - already at min/max,
- * event will be desired value (or else ignored).
- */
+ /* Ignore them completely if the acpi video driver is used */
+ if (eeepc->backlight_device != NULL) {
+ int old_brightness, new_brightness;
+
+ /* Update the backlight device. */
+ old_brightness = eeepc_backlight_notify(eeepc);
+
+ /* Convert event to keypress (obsolescent hack) */
+ new_brightness = event - NOTIFY_BRN_MIN;
+
+ if (new_brightness < old_brightness) {
+ event = NOTIFY_BRN_MIN; /* brightness down */
+ } else if (new_brightness > old_brightness) {
+ event = NOTIFY_BRN_MAX; /* brightness up */
+ } else {
+ /*
+ * no change in brightness - already at min/max,
+ * event will be desired value (or else ignored)
+ */
+ }
+ eeepc_input_notify(eeepc, event);
}
+ } else {
+ /* Everything else is a bona-fide keypress event */
+ eeepc_input_notify(eeepc, event);
}
- eeepc_input_notify(eeepc, event);
}
static void cmsg_quirk(struct eeepc_laptop *eeepc, int cm, const char *name)