diff options
| author | Andrzej Hajda <andrzej.hajda@wp.pl> | 2009-07-02 11:50:35 -0300 |
|---|---|---|
| committer | Mauro Carvalho Chehab <mchehab@redhat.com> | 2009-09-12 12:18:58 -0300 |
| commit | 3c1c48bbcf892e97c4e965b8528f4d735bf9a746 (patch) | |
| tree | 6919aad67cf57b9cab564740c8a0bce82efe53c4 /drivers | |
| parent | ecfcfec80493097967aa40e3433d65a8ff65c86b (diff) | |
V4L/DVB (12465): cx88: High resolution timer for Remote Controls
Patch solves problem of missed keystrokes on some remote controls,
as reported on http://bugzilla.kernel.org/show_bug.cgi?id=9637 .
Signed-off-by: Andrzej Hajda <andrzej.hajda@wp.pl>
Signed-off-by: Jean Delvare <khali@linux-fr.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/media/video/cx88/cx88-input.c | 25 |
1 files changed, 17 insertions, 8 deletions
diff --git a/drivers/media/video/cx88/cx88-input.c b/drivers/media/video/cx88/cx88-input.c index 0abc3210072..79c4408a617 100644 --- a/drivers/media/video/cx88/cx88-input.c +++ b/drivers/media/video/cx88/cx88-input.c @@ -23,7 +23,7 @@ */ #include <linux/init.h> -#include <linux/delay.h> +#include <linux/hrtimer.h> #include <linux/input.h> #include <linux/pci.h> #include <linux/module.h> @@ -48,7 +48,7 @@ struct cx88_IR { /* poll external decoder */ int polling; - struct delayed_work work; + struct hrtimer timer; u32 gpio_addr; u32 last_gpio; u32 mask_keycode; @@ -144,19 +144,28 @@ static void cx88_ir_handle_key(struct cx88_IR *ir) } } -static void cx88_ir_work(struct work_struct *work) +static enum hrtimer_restart cx88_ir_work(struct hrtimer *timer) { - struct cx88_IR *ir = container_of(work, struct cx88_IR, work.work); + unsigned long missed; + struct cx88_IR *ir = container_of(timer, struct cx88_IR, timer); cx88_ir_handle_key(ir); - schedule_delayed_work(&ir->work, msecs_to_jiffies(ir->polling)); + missed = hrtimer_forward_now(&ir->timer, + ktime_set(0, ir->polling * 1000000)); + if (missed > 1) + ir_dprintk("Missed ticks %ld\n", missed - 1); + + return HRTIMER_RESTART; } void cx88_ir_start(struct cx88_core *core, struct cx88_IR *ir) { if (ir->polling) { - INIT_DELAYED_WORK(&ir->work, cx88_ir_work); - schedule_delayed_work(&ir->work, 0); + hrtimer_init(&ir->timer, CLOCK_MONOTONIC, HRTIMER_MODE_REL); + ir->timer.function = cx88_ir_work; + hrtimer_start(&ir->timer, + ktime_set(0, ir->polling * 1000000), + HRTIMER_MODE_REL); } if (ir->sampling) { core->pci_irqmask |= PCI_INT_IR_SMPINT; @@ -173,7 +182,7 @@ void cx88_ir_stop(struct cx88_core *core, struct cx88_IR *ir) } if (ir->polling) - cancel_delayed_work_sync(&ir->work); + hrtimer_cancel(&ir->timer); } /* ---------------------------------------------------------------------- */ |