brcm2708: update linux 4.4 patches to latest version

[openwrt/staging/yousong.git] / target / linux / brcm2708 / patches-4.4 / 0378-media-rc-gpio-ir-recv-add-timeout-on-idle.patch

diff --git a/target/linux/brcm2708/patches-4.4/0378-media-rc-gpio-ir-recv-add-timeout-on-idle.patch b/target/linux/brcm2708/patches-4.4/0378-media-rc-gpio-ir-recv-add-timeout-on-idle.patch
new file mode 100644 (file)
index 0000000..b2cb730
--- /dev/null
+++ b/target/linux/brcm2708/patches-4.4/0378-media-rc-gpio-ir-recv-add-timeout-on-idle.patch
@@ -0,0 +1,91 @@
+From 0cb8bcc4bbdb393d9f8ffa3b81eb09c4f1628be9 Mon Sep 17 00:00:00 2001
+From: Eric Nelson <eric@nelint.com>
+Date: Wed, 23 Sep 2015 11:07:08 -0300
+Subject: [PATCH] [media] rc: gpio-ir-recv: add timeout on idle
+
+Many decoders require a trailing space (period without IR illumination)
+to be delivered before completing a decode.
+
+Since the gpio-ir-recv driver only delivers events on gpio transitions,
+a single IR symbol (caused by a quick touch on an IR remote) will not
+be properly decoded without the use of a timer to flush the tail end
+state of the IR receiver.
+
+This patch initializes and uses a timer and the timeout field of rcdev
+to complete the stream and allow decode.
+
+The timeout can be overridden through the use of the LIRC_SET_REC_TIMEOUT
+ioctl.
+
+Signed-off-by: Eric Nelson <eric@nelint.com>
+Acked-by: Sean Young <sean@mess.org>
+Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
+---
+ drivers/media/rc/gpio-ir-recv.c | 22 ++++++++++++++++++++++
+ 1 file changed, 22 insertions(+)
+
+--- a/drivers/media/rc/gpio-ir-recv.c
++++ b/drivers/media/rc/gpio-ir-recv.c
+@@ -30,6 +30,7 @@ struct gpio_rc_dev {
+       struct rc_dev *rcdev;
+       int gpio_nr;
+       bool active_low;
++      struct timer_list flush_timer;
+ };
+ 
+ #ifdef CONFIG_OF
+@@ -93,12 +94,26 @@ static irqreturn_t gpio_ir_recv_irq(int
+       if (rc < 0)
+               goto err_get_value;
+ 
++      mod_timer(&gpio_dev->flush_timer,
++                jiffies + nsecs_to_jiffies(gpio_dev->rcdev->timeout));
++
+       ir_raw_event_handle(gpio_dev->rcdev);
+ 
+ err_get_value:
+       return IRQ_HANDLED;
+ }
+ 
++static void flush_timer(unsigned long arg)
++{
++      struct gpio_rc_dev *gpio_dev = (struct gpio_rc_dev *)arg;
++      DEFINE_IR_RAW_EVENT(ev);
++
++      ev.timeout = true;
++      ev.duration = gpio_dev->rcdev->timeout;
++      ir_raw_event_store(gpio_dev->rcdev, &ev);
++      ir_raw_event_handle(gpio_dev->rcdev);
++}
++
+ static int gpio_ir_recv_probe(struct platform_device *pdev)
+ {
+       struct gpio_rc_dev *gpio_dev;
+@@ -144,6 +159,9 @@ static int gpio_ir_recv_probe(struct pla
+       rcdev->input_id.version = 0x0100;
+       rcdev->dev.parent = &pdev->dev;
+       rcdev->driver_name = GPIO_IR_DRIVER_NAME;
++      rcdev->min_timeout = 0;
++      rcdev->timeout = IR_DEFAULT_TIMEOUT;
++      rcdev->max_timeout = 10 * IR_DEFAULT_TIMEOUT;
+       if (pdata->allowed_protos)
+               rcdev->allowed_protocols = pdata->allowed_protos;
+       else
+@@ -154,6 +172,9 @@ static int gpio_ir_recv_probe(struct pla
+       gpio_dev->gpio_nr = pdata->gpio_nr;
+       gpio_dev->active_low = pdata->active_low;
+ 
++      setup_timer(&gpio_dev->flush_timer, flush_timer,
++                  (unsigned long)gpio_dev);
++
+       rc = gpio_request(pdata->gpio_nr, "gpio-ir-recv");
+       if (rc < 0)
+               goto err_gpio_request;
+@@ -196,6 +217,7 @@ static int gpio_ir_recv_remove(struct pl
+       struct gpio_rc_dev *gpio_dev = platform_get_drvdata(pdev);
+ 
+       free_irq(gpio_to_irq(gpio_dev->gpio_nr), gpio_dev);
++      del_timer_sync(&gpio_dev->flush_timer);
+       rc_unregister_device(gpio_dev->rcdev);
+       gpio_free(gpio_dev->gpio_nr);
+       kfree(gpio_dev);