[PATCH] firedtv: fix remote control with newer Xorg evdev

After a recent update of xf86-input-evdev and xorg-server, I noticed
that X11 applications did not receive keypresses from the FireDTV
infrared remote control anymore.  Instead, the Xorg log featured lots of

    "FireDTV remote control: dropping event due to full queue!"

exclamations.  The Linux console did not have an issue with the
FireDTV's RC though.

The fix is to insert EV_SYN events after the key-down/-up events.

Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
---
 drivers/media/dvb/firewire/firedtv-rc.c |    8 +++++---
 1 file changed, 5 insertions(+), 3 deletions(-)

Index: b/drivers/media/dvb/firewire/firedtv-rc.c
===================================================================

--- a/drivers/media/dvb/firewire/firedtv-rc.c
+++ b/drivers/media/dvb/firewire/firedtv-rc.c

@@ -172,7 +172,8 @@ void fdtv_unregister_rc(struct firedtv *
 
 void fdtv_handle_rc(struct firedtv *fdtv, unsigned int code)
 {
-	u16 *keycode = fdtv->remote_ctrl_dev->keycode;
+	struct input_dev *idev = fdtv->remote_ctrl_dev;
+	u16 *keycode = idev->keycode;
 
 	if (code >= 0x0300 && code <= 0x031f)
 		code = keycode[code - 0x0300];

@@ -188,6 +189,7 @@ void fdtv_handle_rc(struct firedtv *fdtv
 		return;
 	}
 
-	input_report_key(fdtv->remote_ctrl_dev, code, 1);
-	input_report_key(fdtv->remote_ctrl_dev, code, 0);
+	input_report_key(idev, code, 1);
+	input_report_key(idev, code, 0);
+	input_sync(idev);
 }

-- 
Stefan Richter
-=====-==-== ---= =----
http://arcgraph.de/sr/

Hi Stefan,

On Sun, Jan 16, 2011 at 09:39:21AM +0100, Stefan Richter wrote:

input_sync() is needed here as well - userspace is free to accumulate
device state between EV_SYN events.

+	input_report_key(idev, code, 0);
+	input_sync(idev);
 }

-- 
Dmitry

After a recent update of xf86-input-evdev and xorg-server, I noticed
that X11 applications did not receive keypresses from the FireDTV
infrared remote control anymore.  Instead, the Xorg log featured lots of

    "FireDTV remote control: dropping event due to full queue!"

exclamations.  The Linux console did not have an issue with the
FireDTV's RC though.

The fix is to insert EV_SYN events after the key-down/-up events.
Dimitry notes that EV_SYN is also necessary between down and up,
otherwise userspace could combine their state.

Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
---
 drivers/media/dvb/firewire/firedtv-rc.c |    9 ++++++---
 1 file changed, 6 insertions(+), 3 deletions(-)

Index: b/drivers/media/dvb/firewire/firedtv-rc.c
===================================================================

--- a/drivers/media/dvb/firewire/firedtv-rc.c
+++ b/drivers/media/dvb/firewire/firedtv-rc.c

@@ -172,7 +172,8 @@ void fdtv_unregister_rc(struct firedtv *
 
 void fdtv_handle_rc(struct firedtv *fdtv, unsigned int code)
 {
-	u16 *keycode = fdtv->remote_ctrl_dev->keycode;
+	struct input_dev *idev = fdtv->remote_ctrl_dev;
+	u16 *keycode = idev->keycode;
 
 	if (code >= 0x0300 && code <= 0x031f)
 		code = keycode[code - 0x0300];

@@ -188,6 +189,8 @@ void fdtv_handle_rc(struct firedtv *fdtv
 		return;
 	}
 
-	input_report_key(fdtv->remote_ctrl_dev, code, 1);
-	input_report_key(fdtv->remote_ctrl_dev, code, 0);
+	input_report_key(idev, code, 1);
+	input_sync(idev);
+	input_report_key(idev, code, 0);
+	input_sync(idev);
 }

-- 
Stefan Richter
-=====-==-== ---= =---=
http://arcgraph.de/sr/

On Mon, Jan 17, 2011 at 02:17:58PM +0100, Stefan Richter wrote:

After a recent update of xf86-input-evdev and xorg-server, I noticed
that X11 applications did not receive keypresses from the FireDTV
infrared remote control anymore.  Instead, the Xorg log featured lots of

    "FireDTV remote control: dropping event due to full queue!"

exclamations.  The Linux console did not have an issue with the
FireDTV's RC though.

The fix is to insert EV_SYN events after the key-down/-up events.
Dimitry notes that EV_SYN is also necessary between down and up,
otherwise userspace could combine their state.

Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>

Acked-by: Dmitry Torokhov <redacted>

-- 
Dmitry