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[ALSA] snd-aoa: enable dual-edge in GPIOs 

Apparently some firmware versions forget enabling the dual-edge bit,
snd-powermac did that too and even OSX does sometimes. This should fix
headphone plug detection on those machines.

Signed-off-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Jaroslav Kysela <perex@suse.cz>
This commit is contained in:
Johannes Berg 2006-06-28 14:00:58 +02:00 committed by Jaroslav Kysela
parent c6feefd03e
commit bd66f3bbc3
1 changed files with 15 additions and 0 deletions
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15
sound/aoa/core/snd-aoa-gpio-feature.c
View File

@ -207,6 +207,17 @@ static void ftr_handle_notify(void *data)
mutex_unlock(&notif->mutex);
}
static void gpio_enable_dual_edge(int gpio)
{
int v;
if (gpio == -1)
return;
v = pmac_call_feature(PMAC_FTR_READ_GPIO, NULL, gpio, 0);
v |= 0x80; /* enable dual edge */
pmac_call_feature(PMAC_FTR_WRITE_GPIO, NULL, gpio, v);
}
static void ftr_gpio_init(struct gpio_runtime *rt)
{
get_gpio("headphone-mute", NULL,
@ -234,6 +245,10 @@ static void ftr_gpio_init(struct gpio_runtime *rt)
&linein_detect_gpio,
&linein_detect_gpio_activestate);
gpio_enable_dual_edge(headphone_detect_gpio);
gpio_enable_dual_edge(lineout_detect_gpio);
gpio_enable_dual_edge(linein_detect_gpio);
get_irq(headphone_detect_node, &headphone_detect_irq);
get_irq(lineout_detect_node, &lineout_detect_irq);
get_irq(linein_detect_node, &linein_detect_irq);