From: Hans Verkuil Date: Mon, 25 Sep 2017 08:02:57 +0000 (-0300) Subject: [media] cec-gpio: don't generate spurious HPD events X-Git-Tag: v4.15-rc1~91^2~236 X-Git-Url: http://git.osdn.net/view?a=commitdiff_plain;h=5b2c8da1b040c4608c7cfdc0dd96bcaa190af268;p=uclinux-h8%2Flinux.git [media] cec-gpio: don't generate spurious HPD events Only send HPD_LOW/HIGH event if the gpio actually changed value. Signed-off-by: Hans Verkuil Signed-off-by: Mauro Carvalho Chehab --- diff --git a/drivers/media/platform/cec-gpio/cec-gpio.c b/drivers/media/platform/cec-gpio/cec-gpio.c index eb982bce99fc..5debdf08fbe7 100644 --- a/drivers/media/platform/cec-gpio/cec-gpio.c +++ b/drivers/media/platform/cec-gpio/cec-gpio.c @@ -80,9 +80,12 @@ static irqreturn_t cec_hpd_gpio_irq_handler_thread(int irq, void *priv) static irqreturn_t cec_hpd_gpio_irq_handler(int irq, void *priv) { struct cec_gpio *cec = priv; + bool is_high = gpiod_get_value(cec->hpd_gpio); + if (is_high == cec->hpd_is_high) + return IRQ_HANDLED; cec->hpd_ts = ktime_get(); - cec->hpd_is_high = gpiod_get_value(cec->hpd_gpio); + cec->hpd_is_high = is_high; return IRQ_WAKE_THREAD; }