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V4L/DVB (12465): cx88: High resolution timer for Remote Controls

Browse source 
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>
This commit is contained in:
Andrzej Hajda 2009-07-02 11:50:35 -03:00 committed by Mauro Carvalho Chehab
parent ecfcfec804
commit 3c1c48bbcf
2 changed files with 18 additions and 8 deletions
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1
Documentation/video4linux/CARDLIST.saa7134
View file

@ -167,3 +167,4 @@
166 -> Beholder BeholdTV 607 RDS [5ace:6073]
167 -> Beholder BeholdTV 609 RDS [5ace:6092]
168 -> Beholder BeholdTV 609 RDS [5ace:6093]
169 -> Compro VideoMate S350/S300 [185b:c900]

25
drivers/media/video/cx88/cx88-input.c
View file

@ -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);
}
/* ---------------------------------------------------------------------- */