[PATCH] Restore tuning capabilities in V4L2 MXB driver

[PATCH] Restore tuning capabilities in V4L2 MXB driver

[Michael Hunold]

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Hello Linus,

the behaviour of the all-in-one Video4Linux tuner driver apparently
changed. It now wants to know the tv standard, otherwise it refuses to tune.

The attached patch restores tuning capabilities in my driver for the MXB
analog tv card.

Please apply.

Regards
Michael Hunold.

[-- Attachment #2: v4l2-mxb-fix-video-standard.patch --]
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This patch restores tuning functionality in my driver for the
"Multimedia eXtension Board". The all-in-one tuner driver apparently
changed it's behaviour.

Signed-off-by: Michael Hunold <hunold@linuxtv.org>

diff -ura linux-2.6.15/drivers/media/video/mxb.c b/drivers/media/video/mxb.c
--- linux-2.6.15/drivers/media/video/mxb.c	2006-02-19 18:02:11.000000000 +0100
+++ b/drivers/media/video/mxb.c	2006-02-19 18:02:04.000000000 +0100
@@ -1,7 +1,7 @@
 /*
     mxb - v4l2 driver for the Multimedia eXtension Board
     
-    Copyright (C) 1998-2003 Michael Hunold <michael@mihu.de>
+    Copyright (C) 1998-2006 Michael Hunold <michael@mihu.de>
 
     Visit http://www.mihu.de/linux/saa7146/mxb/
     for further details about this card.
@@ -327,6 +327,7 @@
 	struct video_decoder_init init;
 	struct i2c_msg msg;
 	struct tuner_setup tun_setup;
+	v4l2_std_id std = V4L2_STD_PAL_BG;
 
 	int i = 0, err = 0;
 	struct	tea6415c_multiplex vm;	
@@ -361,6 +362,9 @@
 	mxb->tuner->driver->command(mxb->tuner, VIDIOC_S_FREQUENCY,
 					&mxb->cur_freq);
 
+	/* set a default video standard */
+	mxb->tuner->driver->command(mxb->tuner, VIDIOC_S_STD, &std);
+
 	/* mute audio on tea6420s */
 	mxb->tea6420_1->driver->command(mxb->tea6420_1,TEA6420_SWITCH, &TEA6420_line[6][0]);
 	mxb->tea6420_2->driver->command(mxb->tea6420_2,TEA6420_SWITCH, &TEA6420_line[6][1]);
@@ -921,17 +925,21 @@
 	int one = 1;
 
 	if(V4L2_STD_PAL_I == std->id ) {
+		v4l2_std_id std = V4L2_STD_PAL_I;
 		DEB_D(("VIDIOC_S_STD: setting mxb for PAL_I.\n"));
 		/* set the 7146 gpio register -- I don't know what this does exactly */
       		saa7146_write(dev, GPIO_CTRL, 0x00404050);
 		/* unset the 7111 gpio register -- I don't know what this does exactly */
 		mxb->saa7111a->driver->command(mxb->saa7111a,DECODER_SET_GPIO, &zero);
+		mxb->tuner->driver->command(mxb->tuner, VIDIOC_S_STD, &std);
 	} else {
+		v4l2_std_id std = V4L2_STD_PAL_BG;
 		DEB_D(("VIDIOC_S_STD: setting mxb for PAL/NTSC/SECAM.\n"));
 		/* set the 7146 gpio register -- I don't know what this does exactly */
       		saa7146_write(dev, GPIO_CTRL, 0x00404050);
 		/* set the 7111 gpio register -- I don't know what this does exactly */
 		mxb->saa7111a->driver->command(mxb->saa7111a,DECODER_SET_GPIO, &one);
+		mxb->tuner->driver->command(mxb->tuner, VIDIOC_S_STD, &std);
 	}
 	return 0;
 }