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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>
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] 166 -> Beholder BeholdTV 607 RDS [5ace:6073]
167 -> Beholder BeholdTV 609 RDS [5ace:6092] 167 -> Beholder BeholdTV 609 RDS [5ace:6092]
168 -> Beholder BeholdTV 609 RDS [5ace:6093] 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/init.h>
#include <linux/delay.h> #include <linux/hrtimer.h>
#include <linux/input.h> #include <linux/input.h>
#include <linux/pci.h> #include <linux/pci.h>
#include <linux/module.h> #include <linux/module.h>
@ -48,7 +48,7 @@ struct cx88_IR {
/* poll external decoder */ /* poll external decoder */
int polling; int polling;
struct delayed_work work; struct hrtimer timer;
u32 gpio_addr; u32 gpio_addr;
u32 last_gpio; u32 last_gpio;
u32 mask_keycode; 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); 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) void cx88_ir_start(struct cx88_core *core, struct cx88_IR *ir)
{ {
if (ir->polling) { if (ir->polling) {
INIT_DELAYED_WORK(&ir->work, cx88_ir_work); hrtimer_init(&ir->timer, CLOCK_MONOTONIC, HRTIMER_MODE_REL);
schedule_delayed_work(&ir->work, 0); ir->timer.function = cx88_ir_work;
hrtimer_start(&ir->timer,
ktime_set(0, ir->polling * 1000000),
HRTIMER_MODE_REL);
} }
if (ir->sampling) { if (ir->sampling) {
core->pci_irqmask |= PCI_INT_IR_SMPINT; 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) if (ir->polling)
cancel_delayed_work_sync(&ir->work); hrtimer_cancel(&ir->timer);
} }
/* ---------------------------------------------------------------------- */ /* ---------------------------------------------------------------------- */