From bdf1c98e4205832c07d6dedbfd0ec6eab83df358 Mon Sep 17 00:00:00 2001 From: Mauro Carvalho Chehab Date: Sat, 3 Apr 2010 11:26:01 -0300 Subject: [PATCH] V4L/DVB: saa7134: Add support for both positive and negative edge IRQ The code that enables IRQ for the Remote Controller on saa7134 is a little messy: it is outside saa7134-input, it checks if RC is GPIO based, and it mixes both serial raw decode with parallel reads from a hardware-based IR decoder. Also, currently, it doesn't allow to trigger both transition edges at GPIO16 and GPIO18 lines. A rework on the code is needed to provide a better way to specify what saa7134-input needs, maybe even moving part of the code from saa7134-core and saa7134-cards into saa7134-input. Yet, as a large rework is happening at RC core, it is better to wait until the core changes stablize, in order to rework saa7134 RC internals.While this don't happen, let's just change the logic a little bit to allow enabling IRQ to be generated on both edge transitions, in order to better support pulse/space raw decoders. Signed-off-by: Mauro Carvalho Chehab --- drivers/media/video/saa7134/saa7134-core.c | 10 ++++++---- 1 file changed, 6 insertions(+), 4 deletions(-) diff --git a/drivers/media/video/saa7134/saa7134-core.c b/drivers/media/video/saa7134/saa7134-core.c index 0612fffdd1fe..90f231881297 100644 --- a/drivers/media/video/saa7134/saa7134-core.c +++ b/drivers/media/video/saa7134/saa7134-core.c @@ -701,10 +701,12 @@ static int saa7134_hw_enable2(struct saa7134_dev *dev) if (dev->has_remote == SAA7134_REMOTE_GPIO && dev->remote) { if (dev->remote->mask_keydown & 0x10000) irq2_mask |= SAA7134_IRQ2_INTE_GPIO16_N; - else if (dev->remote->mask_keydown & 0x40000) - irq2_mask |= SAA7134_IRQ2_INTE_GPIO18_P; - else if (dev->remote->mask_keyup & 0x40000) - irq2_mask |= SAA7134_IRQ2_INTE_GPIO18_N; + else { /* Allow enabling both IRQ edge triggers */ + if (dev->remote->mask_keydown & 0x40000) + irq2_mask |= SAA7134_IRQ2_INTE_GPIO18_P; + if (dev->remote->mask_keyup & 0x40000) + irq2_mask |= SAA7134_IRQ2_INTE_GPIO18_N; + } } if (dev->has_remote == SAA7134_REMOTE_I2C) {