diff options
Diffstat (limited to 'target/linux/s3c24xx/patches/0118-fix-jack-interrupt-debounce-loss-window.patch.patch')
| -rwxr-xr-x | target/linux/s3c24xx/patches/0118-fix-jack-interrupt-debounce-loss-window.patch.patch | 82 |
1 files changed, 82 insertions, 0 deletions
diff --git a/target/linux/s3c24xx/patches/0118-fix-jack-interrupt-debounce-loss-window.patch.patch b/target/linux/s3c24xx/patches/0118-fix-jack-interrupt-debounce-loss-window.patch.patch new file mode 100755 index 0000000000..58b07d74a6 --- /dev/null +++ b/target/linux/s3c24xx/patches/0118-fix-jack-interrupt-debounce-loss-window.patch.patch @@ -0,0 +1,82 @@ +From 0143ee8d373f04e443645072a24ff0c7c87036c6 Mon Sep 17 00:00:00 2001 +From: Andy Green <andy@openmoko.com> +Date: Fri, 25 Jul 2008 23:06:05 +0100 +Subject: [PATCH] fix-jack-interrupt-debounce-loss-window.patch + +Make sure we can't lose a jack interrupt in debounce, despite it is +a one-in-a-million thing that just needs replug to clear + +Signed-off-by: Andy Green <andy@openmoko.com> +--- + drivers/input/keyboard/neo1973kbd.c | 50 +++++++++++++++++++++++----------- + 1 files changed, 34 insertions(+), 16 deletions(-) + +diff --git a/drivers/input/keyboard/neo1973kbd.c b/drivers/input/keyboard/neo1973kbd.c +index a1fc7a3..8b9a420 100644 +--- a/drivers/input/keyboard/neo1973kbd.c ++++ b/drivers/input/keyboard/neo1973kbd.c +@@ -62,27 +62,45 @@ static irqreturn_t neo1973kbd_hold_irq(int irq, void *dev_id) + 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 */ ++ unsigned long flags; ++ int loop = 0; + + 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; ++ /* ++ * 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); ++ /* ++ * we go around the outer loop again if we detect that more ++ * interrupts came while we are servicing here. But we have ++ * to sequence it carefully with interrupts off ++ */ ++ local_save_flags(flags); ++ /* no interrupts during this work means we can exit the work */ ++ loop = !!(kbd->hp_irq_count != kbd->hp_irq_count_in_work); ++ if (!loop) ++ kbd->work_in_progress = 0; ++ local_irq_restore(flags); ++ /* ++ * interrupt that comes here will either queue a new work action ++ * since work_in_progress is cleared now, or be dealt with ++ * when we loop. ++ */ ++ } while (loop); + } + + +- + static irqreturn_t neo1973kbd_headphone_irq(int irq, void *dev_id) + { + struct neo1973kbd *neo1973kbd_data = dev_id; +-- +1.5.6.3 + |