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Commit 2e4ebde2 authored by James Hogan's avatar James Hogan Committed by Mauro Carvalho Chehab
Browse files

[media] rc: rc-loopback: Add loopback of filter scancodes 



Add the s_wakeup_filter callback to the rc-loopback driver, which instead of
setting the filter just feeds the scancode back through the input device
so that it can be verified.

Signed-off-by: default avatarJames Hogan <james@albanarts.com>
Signed-off-by: default avatarAntti Seppälä <a.seppala@gmail.com>
Cc: David Härdeman <david@hardeman.nu>
Signed-off-by: default avatarMauro Carvalho Chehab <mchehab@osg.samsung.com>
parent 0d830b2d

drivers/media/rc/rc-loopback.c

+36 −0
Original line number Diff line number Diff line
@@ -26,6 +26,7 @@ 
#include <linux/device.h>

#include <linux/module.h>

#include <linux/sched.h>

#include <linux/slab.h>

#include <media/rc-core.h>



#define DRIVER_NAME	"rc-loopback"
@@ -176,6 +177,39 @@ static int loop_set_carrier_report(struct rc_dev *dev, int enable) 
	return 0;

}



static int loop_set_wakeup_filter(struct rc_dev *dev,

				  struct rc_scancode_filter *sc_filter)

{

	static const unsigned int max = 512;

	struct ir_raw_event *raw;

	int ret;

	int i;



	/* fine to disable filter */

	if (!sc_filter->mask)

		return 0;



	/* encode the specified filter and loop it back */

	raw = kmalloc_array(max, sizeof(*raw), GFP_KERNEL);

	ret = ir_raw_encode_scancode(dev->enabled_wakeup_protocols, sc_filter,

				     raw, max);

	/* still loop back the partial raw IR even if it's incomplete */

	if (ret == -ENOBUFS)

		ret = max;

	if (ret >= 0) {

		/* do the loopback */

		for (i = 0; i < ret; ++i)

			ir_raw_event_store(dev, &raw[i]);

		ir_raw_event_handle(dev);



		ret = 0;

	}



	kfree(raw);



	return ret;

}



static int __init loop_init(void)

{

	struct rc_dev *rc;
@@ -195,6 +229,7 @@ static int __init loop_init(void) 
	rc->map_name		= RC_MAP_EMPTY;

	rc->priv		= &loopdev;

	rc->driver_type		= RC_DRIVER_IR_RAW;

	rc->encode_wakeup	= true;

	rc->allowed_protocols	= RC_BIT_ALL;

	rc->timeout		= 100 * 1000 * 1000; /* 100 ms */

	rc->min_timeout		= 1;
@@ -209,6 +244,7 @@ static int __init loop_init(void) 
	rc->s_idle		= loop_set_idle;

	rc->s_learning_mode	= loop_set_learning_mode;

	rc->s_carrier_report	= loop_set_carrier_report;

	rc->s_wakeup_filter	= loop_set_wakeup_filter;



	loopdev.txmask		= RXMASK_REGULAR;

	loopdev.txcarrier	= 36000;