[PATCH] input: uinput: Setup MT usage during device creation

[PATCH] input: uinput: Setup MT usage during device creation

[Henrik Rydberg]

The input devices created by uinput do not currently handle multitouch
properly. All events will appear as if they came from slot zero, and
the input event buffers are not adjusted. This patch creates the MT
slots during setup, and sets the number of events per packet based
on the MT usage.

Signed-off-by: Henrik Rydberg <rydberg@euromail.se>
---
 drivers/input/misc/uinput.c |    7 +++++++
 1 files changed, 7 insertions(+), 0 deletions(-)

diff --git a/drivers/input/misc/uinput.c b/drivers/input/misc/uinput.c
index 0d4266a..3606985 100644
--- a/drivers/input/misc/uinput.c
+++ b/drivers/input/misc/uinput.c
@@ -404,6 +404,13 @@ static int uinput_setup_device(struct uinput_device *udev, const char __user *bu
 		retval = uinput_validate_absbits(dev);
 		if (retval < 0)
 			goto exit;
+		if (test_bit(ABS_MT_SLOT, dev->absbit)) {
+			int nslot = input_abs_get_max(dev, ABS_MT_SLOT) + 1;
+			input_mt_create_slots(dev, nslot);
+			input_set_events_per_packet(dev, 6 * nslot);
+		} else if (test_bit(ABS_MT_POSITION_X, dev->absbit)) {
+			input_set_events_per_packet(dev, 60);
+		}
 	}
 
 	udev->state = UIST_SETUP_COMPLETE;
-- 
1.7.1

Re: [PATCH] input: uinput: Setup MT usage during device creation

[Dmitry Torokhov]

On Sun, Sep 19, 2010 at 01:54:13PM +0200, Henrik Rydberg wrote:
> The input devices created by uinput do not currently handle multitouch
> properly. All events will appear as if they came from slot zero, and
> the input event buffers are not adjusted. This patch creates the MT
> slots during setup, and sets the number of events per packet based
> on the MT usage.
> 
> Signed-off-by: Henrik Rydberg <rydberg@euromail.se>

Applied to 'for-linus', thank you Henrik.

-- 
Dmitry