Commit b8c7d915 authored by James Hogan's avatar James Hogan Committed by Mauro Carvalho Chehab
Browse files

[media] rc-main: add generic scancode filtering 



Add generic scancode filtering of RC input events, and fall back to
permitting any RC_FILTER_NORMAL scancode filter to be set if no s_filter
callback exists. This allows raw IR decoder events to be filtered, and
potentially allows hardware decoders to set looser filters and rely on
generic code to filter out the corner cases.

Signed-off-by: default avatarJames Hogan <james.hogan@imgtec.com>
Reviewed-by: default avatarAntti Seppälä <a.seppala@gmail.com>
Signed-off-by: default avatarMauro Carvalho Chehab <m.chehab@samsung.com>
parent c3c2077d

drivers/media/rc/rc-main.c

+13 −7
Original line number Diff line number Diff line
@@ -633,6 +633,7 @@ EXPORT_SYMBOL_GPL(rc_repeat); 
static void ir_do_keydown(struct rc_dev *dev, int scancode,

			  u32 keycode, u8 toggle)

{

	struct rc_scancode_filter *filter;

	bool new_event = !dev->keypressed ||

			 dev->last_scancode != scancode ||

			 dev->last_toggle != toggle;
@@ -640,6 +641,11 @@ static void ir_do_keydown(struct rc_dev *dev, int scancode, 
	if (new_event && dev->keypressed)

		ir_do_keyup(dev, false);



	/* Generic scancode filtering */

	filter = &dev->scancode_filters[RC_FILTER_NORMAL];

	if (filter->mask && ((scancode ^ filter->data) & filter->mask))

		return;



	input_event(dev->input_dev, EV_MSC, MSC_SCAN, scancode);



	if (new_event && keycode != KEY_RESERVED) {
@@ -1019,9 +1025,7 @@ static ssize_t show_filter(struct device *device, 
		return -EINVAL;



	mutex_lock(&dev->lock);

	if (!dev->s_filter)

		val = 0;

	else if (fattr->mask)

	if (fattr->mask)

		val = dev->scancode_filters[fattr->type].mask;

	else

		val = dev->scancode_filters[fattr->type].data;
@@ -1069,7 +1073,7 @@ static ssize_t store_filter(struct device *device, 
		return ret;



	/* Scancode filter not supported (but still accept 0) */

	if (!dev->s_filter)

	if (!dev->s_filter && fattr->type != RC_FILTER_NORMAL)

		return val ? -EINVAL : count;



	mutex_lock(&dev->lock);
@@ -1081,9 +1085,11 @@ static ssize_t store_filter(struct device *device, 
		local_filter.mask = val;

	else

		local_filter.data = val;

	if (dev->s_filter) {

		ret = dev->s_filter(dev, fattr->type, &local_filter);

		if (ret < 0)

			goto unlock;

	}



	/* Success, commit the new filter */

	*filter = local_filter;

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