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eeepc-laptop: report brightness control events via the input layer 

This maps the brightness control events to one of two keys, either
KEY_BRIGHTNESSDOWN or KEY_BRIGHTNESSUP, as needed.

Some mapping has to be done due to the fact that the BIOS reports them as
<base value> + <current brightness index>; the selection is done according to
the sign of the change in brightness (if this is 0, no keypress is reported).

(Ref. http://lists.alioth.debian.org/pipermail/debian-eeepc-devel/2009-April/002001.html)

Signed-off-by: Darren Salt <linux@youmustbejoking.demon.co.uk>
Signed-off-by: Corentin Chary <corentincj@iksaif.net>
Signed-off-by: Len Brown <len.brown@intel.com>
This commit is contained in:
Darren Salt 2009-04-27 09:23:38 +02:00 committed by Len Brown
parent fbc97e4c5c
commit 64b86b6583
1 changed files with 26 additions and 3 deletions
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29
drivers/platform/x86/eeepc-laptop.c
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@ -166,6 +166,8 @@ static struct key_entry eeepc_keymap[] = {
{KE_KEY, 0x1b, KEY_ZOOM },
{KE_KEY, 0x1c, KEY_PROG2 },
{KE_KEY, 0x1d, KEY_PROG3 },
{KE_KEY, NOTIFY_BRN_MIN, KEY_BRIGHTNESSDOWN },
{KE_KEY, NOTIFY_BRN_MIN + 2, KEY_BRIGHTNESSUP },
{KE_KEY, 0x30, KEY_SWITCHVIDEOMODE },
{KE_KEY, 0x31, KEY_SWITCHVIDEOMODE },
{KE_KEY, 0x32, KEY_SWITCHVIDEOMODE },
@ -512,11 +514,16 @@ static int eeepc_hotk_check(void)
return 0;
}
static void notify_brn(void)
static int notify_brn(void)
{
/* returns the *previous* brightness, or -1 */
struct backlight_device *bd = eeepc_backlight_device;
if (bd)
if (bd) {
int old = bd->props.brightness;
bd->props.brightness = read_brightness(bd);
return old;
}
return -1;
}
static void eeepc_rfkill_notify(acpi_handle handle, u32 event, void *data)
@ -558,17 +565,33 @@ static void eeepc_hotk_notify(acpi_handle handle, u32 event, void *data)
{
static struct key_entry *key;
u16 count;
int brn = -ENODEV;
if (!ehotk)
return;
if (event >= NOTIFY_BRN_MIN && event <= NOTIFY_BRN_MAX)
notify_brn();
brn = notify_brn();
count = ehotk->event_count[event % 128]++;
acpi_bus_generate_proc_event(ehotk->device, event, count);
acpi_bus_generate_netlink_event(ehotk->device->pnp.device_class,
dev_name(&ehotk->device->dev), event,
count);
if (ehotk->inputdev) {
if (brn != -ENODEV) {
/* brightness-change events need special
* handling for conversion to key events
*/
if (brn < 0)
brn = event;
else
brn += NOTIFY_BRN_MIN;
if (event < brn)
event = NOTIFY_BRN_MIN; /* brightness down */
else if (event > brn)
event = NOTIFY_BRN_MIN + 2; /* ... up */
else
event = NOTIFY_BRN_MIN + 1; /* ... unchanged */
}
key = eepc_get_entry_by_scancode(event);
if (key) {
switch (key->type) {