linux-kernel - [PATCH] Hardware MPEG audio fix for SAA7134 based "KNC One TV-Station DVR" card

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Date:	Sun, 17 Jun 2007 17:01:51 +0200
From:	Rafał Bilski <rafalbilski@...eria.pl>
To:	Mauro Carvalho Chehab <mchehab@...radead.org>
Cc:	video4linux-list@...hat.com,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: [PATCH] Hardware MPEG audio fix for SAA7134 based "KNC One TV-Station
 DVR" card


With previous patch card is generating MPEG audio stream too.
Unfortunatly I2S audio output is muted. Unmute it.

Signed-off-by: Rafal Bilski <rafalbilski@...eria.pl>
---
 drivers/media/video/saa7134/saa7134-empress.c |    8 ++++++++
 1 files changed, 8 insertions(+), 0 deletions(-)

diff --git a/drivers/media/video/saa7134/saa7134-empress.c b/drivers/media/video/saa7134/saa7134-empress.c
--- a/drivers/media/video/saa7134/saa7134-empress.c
+++ b/drivers/media/video/saa7134/saa7134-empress.c
@@ -96,6 +96,10 @@ static int ts_open(struct inode *inode, struct file *file)
 	if (dev->empress_users)
 		goto done_up;
 
+	/* Unmute audio */
+	saa_writeb(SAA7134_AUDIO_MUTE_CTRL,
+		saa_readb(SAA7134_AUDIO_MUTE_CTRL) & ~(1 << 6));
+
 	dev->empress_users++;
 	file->private_data = dev;
 	err = 0;
@@ -121,6 +125,10 @@ static int ts_release(struct inode *inode, struct file *file)
 	/* stop the encoder */
 	ts_reset_encoder(dev);
 
+	/* Mute audio */
+	saa_writeb(SAA7134_AUDIO_MUTE_CTRL,
+		saa_readb(SAA7134_AUDIO_MUTE_CTRL) | (1 << 6));
+
 	mutex_unlock(&dev->empress_tsq.lock);
 	return 0;
 }
-- 


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