diff options
Diffstat (limited to 'target/linux/brcm2708/patches-4.4/0378-media-rc-gpio-ir-recv-add-timeout-on-idle.patch')
| -rw-r--r-- | target/linux/brcm2708/patches-4.4/0378-media-rc-gpio-ir-recv-add-timeout-on-idle.patch | 91 |
1 files changed, 91 insertions, 0 deletions
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 index 0000000000..b2cb730bc8 --- /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); |