linux-kernel - [PATCH v2] media: ttpci: remove autorepeat handling and use timer

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Date:   Tue, 31 Oct 2017 20:11:43 +0000
From:   Sean Young <sean@...s.org>
To:     Dmitry Torokhov <dmitry.torokhov@...il.com>
Cc:     Mauro Carvalho Chehab <mchehab@...nel.org>,
        Hans Verkuil <hans.verkuil@...co.com>,
        Kees Cook <keescook@...omium.org>, linux-media@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: [PATCH v2] media: ttpci: remove autorepeat handling and use
 timer_setup

Leave the autorepeat handling up to the input layer, and move
to the new timer API.

Compile tested only.

Signed-off-by: Sean Young <sean@...s.org>
---
v2:
 - fixes and improvements from Dmitry Torokhov

 drivers/media/pci/ttpci/av7110.h    |  2 +-
 drivers/media/pci/ttpci/av7110_ir.c | 56 +++++++++++++------------------------
 2 files changed, 21 insertions(+), 37 deletions(-)

diff --git a/drivers/media/pci/ttpci/av7110.h b/drivers/media/pci/ttpci/av7110.h
index 347827925c14..bcb72ecbedc0 100644
--- a/drivers/media/pci/ttpci/av7110.h
+++ b/drivers/media/pci/ttpci/av7110.h
@@ -93,7 +93,7 @@ struct infrared {
 	u8			inversion;
 	u16			last_key;
 	u16			last_toggle;
-	u8			delay_timer_finished;
+	bool			keypressed;
 };
 
 
diff --git a/drivers/media/pci/ttpci/av7110_ir.c b/drivers/media/pci/ttpci/av7110_ir.c
index ca05198de2c2..ee414803e6b5 100644
--- a/drivers/media/pci/ttpci/av7110_ir.c
+++ b/drivers/media/pci/ttpci/av7110_ir.c
@@ -84,15 +84,16 @@ static u16 default_key_map [256] = {
 
 
 /* key-up timer */
-static void av7110_emit_keyup(unsigned long parm)
+static void av7110_emit_keyup(struct timer_list *t)
 {
-	struct infrared *ir = (struct infrared *) parm;
+	struct infrared *ir = from_timer(ir, t, keyup_timer);
 
-	if (!ir || !test_bit(ir->last_key, ir->input_dev->key))
+	if (!ir || !ir->keypressed)
 		return;
 
 	input_report_key(ir->input_dev, ir->last_key, 0);
 	input_sync(ir->input_dev);
+	ir->keypressed = false;
 }
 
 
@@ -152,29 +153,18 @@ static void av7110_emit_key(unsigned long parm)
 		return;
 	}
 
-	if (timer_pending(&ir->keyup_timer)) {
-		del_timer(&ir->keyup_timer);
-		if (ir->last_key != keycode || toggle != ir->last_toggle) {
-			ir->delay_timer_finished = 0;
-			input_event(ir->input_dev, EV_KEY, ir->last_key, 0);
-			input_event(ir->input_dev, EV_KEY, keycode, 1);
-			input_sync(ir->input_dev);
-		} else if (ir->delay_timer_finished) {
-			input_event(ir->input_dev, EV_KEY, keycode, 2);
-			input_sync(ir->input_dev);
-		}
-	} else {
-		ir->delay_timer_finished = 0;
-		input_event(ir->input_dev, EV_KEY, keycode, 1);
-		input_sync(ir->input_dev);
-	}
+	if (ir->keypressed &&
+	    (ir->last_key != keycode || toggle != ir->last_toggle))
+		input_event(ir->input_dev, EV_KEY, ir->last_key, 0);
 
+	input_event(ir->input_dev, EV_KEY, keycode, 1);
+	input_sync(ir->input_dev);
+
+	ir->keypressed = true;
 	ir->last_key = keycode;
 	ir->last_toggle = toggle;
 
-	ir->keyup_timer.expires = jiffies + UP_TIMEOUT;
-	add_timer(&ir->keyup_timer);
-
+	mod_timer(&ir->keyup_timer, jiffies + UP_TIMEOUT);
 }
 
 
@@ -204,16 +194,6 @@ static void input_register_keys(struct infrared *ir)
 	ir->input_dev->keycodemax = ARRAY_SIZE(ir->key_map);
 }
 
-
-/* called by the input driver after rep[REP_DELAY] ms */
-static void input_repeat_key(unsigned long parm)
-{
-	struct infrared *ir = (struct infrared *) parm;
-
-	ir->delay_timer_finished = 1;
-}
-
-
 /* check for configuration changes */
 int av7110_check_ir_config(struct av7110 *av7110, int force)
 {
@@ -333,8 +313,7 @@ int av7110_ir_init(struct av7110 *av7110)
 	av_list[av_cnt++] = av7110;
 	av7110_check_ir_config(av7110, true);
 
-	setup_timer(&av7110->ir.keyup_timer, av7110_emit_keyup,
-		    (unsigned long)&av7110->ir);
+	timer_setup(&av7110->ir.keyup_timer, av7110_emit_keyup, 0);
 
 	input_dev = input_allocate_device();
 	if (!input_dev)
@@ -365,8 +344,13 @@ int av7110_ir_init(struct av7110 *av7110)
 		input_free_device(input_dev);
 		return err;
 	}
-	input_dev->timer.function = input_repeat_key;
-	input_dev->timer.data = (unsigned long) &av7110->ir;
+
+	/*
+	 * Input core's default autorepeat is 33 cps with 250 msec
+	 * delay, let's adjust to numbers more suitable for remote
+	 * control.
+	 */
+	input_enable_softrepeat(input_dev, 250, 125);
 
 	if (av_cnt == 1) {
 		e = proc_create("av7110_ir", S_IWUSR, NULL, &av7110_ir_proc_fops);
-- 
2.13.6