diff options
Diffstat (limited to 'target/linux/s3c24xx/patches-2.6.24/1123-fix-jack-debounce.patch.patch')
| -rw-r--r-- | target/linux/s3c24xx/patches-2.6.24/1123-fix-jack-debounce.patch.patch | 118 |
1 files changed, 0 insertions, 118 deletions
diff --git a/target/linux/s3c24xx/patches-2.6.24/1123-fix-jack-debounce.patch.patch b/target/linux/s3c24xx/patches-2.6.24/1123-fix-jack-debounce.patch.patch deleted file mode 100644 index 45d4a07f7a..0000000000 --- a/target/linux/s3c24xx/patches-2.6.24/1123-fix-jack-debounce.patch.patch +++ /dev/null @@ -1,118 +0,0 @@ -From 9a5d2d81c0bf5c8fe2ac58d267033876904ed925 Mon Sep 17 00:00:00 2001 -From: Andy Green <andy@openmoko.com> -Date: Sun, 13 Apr 2008 07:25:57 +0100 -Subject: [PATCH] fix-jack-debounce.patch - -Headphone jack detection is bouncy, it can trigger multiple interrupts -on insertion or removal. This patch adds a workqueue that waits out the -interrupt spew in 100ms units, and if it sees no more interrupts for 100ms -only then samples and reports the jack state. I was unable to get a bounce -after 20 or so tries after this. - -Signed-off-by: Andy Green <andy@openmoko.com> ---- - drivers/input/keyboard/neo1973kbd.c | 63 ++++++++++++++++++++++++++++++++-- - 1 files changed, 59 insertions(+), 4 deletions(-) - -diff --git a/drivers/input/keyboard/neo1973kbd.c b/drivers/input/keyboard/neo1973kbd.c -index 06fa8e0..6c96660 100644 ---- a/drivers/input/keyboard/neo1973kbd.c -+++ b/drivers/input/keyboard/neo1973kbd.c -@@ -21,6 +21,7 @@ - #include <linux/jiffies.h> - #include <linux/module.h> - #include <linux/slab.h> -+#include <linux/workqueue.h> - - #include <asm/gpio.h> - #include <asm/mach-types.h> -@@ -28,6 +29,11 @@ - struct neo1973kbd { - struct input_dev *input; - unsigned int suspended; -+ struct work_struct work; -+ int work_in_progress; -+ int hp_irq_count_in_work; -+ int hp_irq_count; -+ int jack_irq; - }; - - static irqreturn_t neo1973kbd_aux_irq(int irq, void *dev_id) -@@ -52,14 +58,61 @@ static irqreturn_t neo1973kbd_hold_irq(int irq, void *dev_id) - return IRQ_HANDLED; - } - -+ -+static void neo1973kbd_debounce_jack(struct work_struct *work) -+{ -+ struct neo1973kbd *kbd = container_of(work, struct neo1973kbd, work); -+ -+ /* we wait out any multiple interrupt stuttering in 100ms lumps */ -+ -+ do { -+ kbd->hp_irq_count_in_work = kbd->hp_irq_count; -+ msleep(100); -+ } while (kbd->hp_irq_count != kbd->hp_irq_count_in_work); -+ -+ /* no new interrupts on jack for 100ms... ok we will report it */ -+ -+ input_report_switch(kbd->input, -+ SW_HEADPHONE_INSERT, -+ gpio_get_value(irq_to_gpio(kbd->jack_irq))); -+ input_sync(kbd->input); -+ -+ /* next time we get an interrupt on jack we need new work action */ -+ kbd->work_in_progress = 0; -+} -+ -+ -+ - static irqreturn_t neo1973kbd_headphone_irq(int irq, void *dev_id) - { - struct neo1973kbd *neo1973kbd_data = dev_id; - -- int key_pressed = gpio_get_value(irq_to_gpio(irq)); -- input_report_switch(neo1973kbd_data->input, -- SW_HEADPHONE_INSERT, key_pressed); -- input_sync(neo1973kbd_data->input); -+ /* -+ * this interrupt is prone to bouncing and userspace doesn't like -+ * to have to deal with that kind of thing. So we do not accept -+ * that a jack interrupt is equal to a jack event. Instead we fire -+ * some work on the first interrupt, and it hangs about in 100ms units -+ * until no more interrupts come. Then it accepts the state it finds -+ * for jack insert and reports it once -+ */ -+ -+ neo1973kbd_data->hp_irq_count++; -+ /* -+ * the first interrupt we see for a while, we fire the work item -+ * and record the interrupt count when we did that. If more interrupts -+ * come in the meanwhile, we can tell by the difference in that -+ * stored count and hp_irq_count which increments every interrupt -+ */ -+ if (!neo1973kbd_data->work_in_progress) { -+ neo1973kbd_data->jack_irq = irq; -+ neo1973kbd_data->hp_irq_count_in_work = -+ neo1973kbd_data->hp_irq_count; -+ if (!schedule_work(&neo1973kbd_data->work)) -+ printk(KERN_ERR -+ "Unable to schedule headphone debounce\n"); -+ else -+ neo1973kbd_data->work_in_progress = 1; -+ } - - return IRQ_HANDLED; - } -@@ -120,6 +173,8 @@ static int neo1973kbd_probe(struct platform_device *pdev) - - neo1973kbd->input = input_dev; - -+ INIT_WORK(&neo1973kbd->work, neo1973kbd_debounce_jack); -+ - input_dev->name = "Neo1973 Buttons"; - input_dev->phys = "neo1973kbd/input0"; - input_dev->id.bustype = BUS_HOST; --- -1.5.6.5 - |