Dvico Dual 4 card not working.

Dvico Dual 4 card not working.

[Nicholas Magers]

I have run a number of updates on my Fedora 8 system and now my Dvico
Dual 4 card no longer works. I use it with Mythtv. It seems when I
updated my Nvidia graphics driver from Livna it had an effect. I am at
work now but can provide some output if required. I have also built my
friends machine and found the exact same issue. Any help would be
appreciated.


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Re: Dvico Dual 4 card not working.

[Alan Cox]

On Mon, Mar 31, 2008 at 02:22:15PM +1100, Nicholas Magers wrote:
> Dual 4 card no longer works. I use it with Mythtv. It seems when I
> updated my Nvidia graphics driver from Livna it had an effect. I am at

Nvidia driver reports should go to Nvidia, only they have the source code
so only they can help you

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RE: Dvico Dual 4 card not working.

[Nicholas Magers]

Is this an automated response. Alan are you a robot?

Fortunately I was able to get my Dvico dual 4 TV tuner card working
again by removing the v4l distribution and going back to hg clone
http://linuxtv.org/hg/~pascoe/xc-test Instructions on this page
http://www.itee.uq.edu.au/~chrisp/Linux-DVB/DVICO/

-----Original Message-----
From: Alan Cox [mailto:alan@redhat.com] 
Sent: Monday, 31 March 2008 8:32 PM
To: Nicholas Magers
Cc: video4linux-list@redhat.com
Subject: Re: Dvico Dual 4 card not working.

On Mon, Mar 31, 2008 at 02:22:15PM +1100, Nicholas Magers wrote:
> Dual 4 card no longer works. I use it with Mythtv. It seems when I
> updated my Nvidia graphics driver from Livna it had an effect. I am at

Nvidia driver reports should go to Nvidia, only they have the source
code
so only they can help you


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Re: Dvico Dual 4 card not working.

[Alan Cox]

On Tue, Apr 01, 2008 at 08:57:13AM +1100, Nicholas Magers wrote:
> Is this an automated response. Alan are you a robot?

Neither a robot nor 1000 gnomes, just pointing out the reality. Nvidia have
our soure, we don't have theirs so if you get a bug with their driver we can't
really do anything about it - but Nvidia can.

Alan

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RE: Dvico Dual 4 card not working.

[Nicholas Magers]

I guess what I'm saying is in my naivety I mentioned the word 'Nvidia'.
In all likelihood the problem has nothing to do with the 'Nvidia"
component. I will in the future not mention the word 'Nvidia' so that my
questions aren't railroaded to a dead end. Thanks for the valuable
lesson.

-----Original Message-----
From: Alan Cox [mailto:alan@redhat.com] 
Sent: Tuesday, 1 April 2008 10:33 AM
To: Nicholas Magers
Cc: Alan Cox; video4linux-list@redhat.com
Subject: Re: Dvico Dual 4 card not working.

On Tue, Apr 01, 2008 at 08:57:13AM +1100, Nicholas Magers wrote:
> Is this an automated response. Alan are you a robot?

Neither a robot nor 1000 gnomes, just pointing out the reality. Nvidia
have
our soure, we don't have theirs so if you get a bug with their driver we
can't
really do anything about it - but Nvidia can.

Alan


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Re: Dvico Dual 4 card not working.

[Ben Caldwell]

>
> ---------- Forwarded message ----------
> From: Alan Cox <alan@redhat.com>
> To: Nicholas Magers <Nicholas.Magers@lands.nsw.gov.au>
> Date: Mon, 31 Mar 2008 05:32:05 -0400
> Subject: Re: Dvico Dual 4 card not working.
> On Mon, Mar 31, 2008 at 02:22:15PM +1100, Nicholas Magers wrote:
> > Dual 4 card no longer works. I use it with Mythtv. It seems when I
> > updated my Nvidia graphics driver from Livna it had an effect. I am at
>
> Nvidia driver reports should go to Nvidia, only they have the source code
> so only they can help you
>
I have recently posted a similar problem with the dvico dual digital 4 card
on a Fedora 8 mythtv box. I don't think that this problem is due to the
nvidia driver.
My tuner card was working fine until I updated the to the latest v4l source
from the hg repository a week or two back and made new kernel modules, I
included traces in my post which can be seen in the list archives at the end
of march.
I reverted to a previous kernel that still has the kernel modules made from
an earlier version of the v4l source and everything works fine again. I am
not going to try compiling new modules for the working kernel as it could
leave me with no way at all to use my tuner card.

So tonight I will try building modules for my latest kernel (from Fedora
updates) from an older version of the v4l source and report back to this
list with the results.

- Ben Caldwell
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RE: Dvico Dual 4 card not working.

[Nicholas Magers]

I'll be interested in the result.

 

From: Ben Caldwell [mailto:benny.caldwell@gmail.com] 
Sent: Tuesday, 1 April 2008 12:54 PM
To: video4linux-list@redhat.com
Cc: alan@redhat.com; Nicholas Magers
Subject: Re: Dvico Dual 4 card not working.

 

	---------- Forwarded message ----------
	From: Alan Cox <alan@redhat.com>
	To: Nicholas Magers <Nicholas.Magers@lands.nsw.gov.au>
	Date: Mon, 31 Mar 2008 05:32:05 -0400
	Subject: Re: Dvico Dual 4 card not working.
	On Mon, Mar 31, 2008 at 02:22:15PM +1100, Nicholas Magers wrote:
	> Dual 4 card no longer works. I use it with Mythtv. It seems
when I
	> updated my Nvidia graphics driver from Livna it had an effect.
I am at
	
	Nvidia driver reports should go to Nvidia, only they have the
source code
	so only they can help you

I have recently posted a similar problem with the dvico dual digital 4
card on a Fedora 8 mythtv box. I don't think that this problem is due to
the nvidia driver.

My tuner card was working fine until I updated the to the latest v4l
source from the hg repository a week or two back and made new kernel
modules, I included traces in my post which can be seen in the list
archives at the end of march.

I reverted to a previous kernel that still has the kernel modules made
from an earlier version of the v4l source and everything works fine
again. I am not going to try compiling new modules for the working
kernel as it could leave me with no way at all to use my tuner card.

 

So tonight I will try building modules for my latest kernel (from Fedora
updates) from an older version of the v4l source and report back to this
list with the results.

 

- Ben Caldwell


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Re: Dvico Dual 4 card not working.

[Alan Cox]

On Tue, Apr 01, 2008 at 12:14:18PM +1100, Nicholas Magers wrote:
> I guess what I'm saying is in my naivety I mentioned the word 'Nvidia'.
> In all likelihood the problem has nothing to do with the 'Nvidia"
> component. I will in the future not mention the word 'Nvidia' so that my
> questions aren't railroaded to a dead end. Thanks for the valuable
> lesson.

Far more constructive would be to make sure you can reproduce bugs with the
"nv" driver - a lot of video playback and overlay bugs are heavily dependant
upon the X video driver and so things like Nvidia binary drivers cause problems
like those you reported

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Re: Dvico Dual 4 card not working.

[冯鑫]

I use a driver that is "soc_camera V4L2 interface for directly
connected cameras".but I have some problems:
1、is this driver for linux-2.6.24?
2、I want to know how can I get arch/arm/mach-pxa/devices.c.
3、the function mt9v022_probe(struct i2c_client *client) in mt9v022.c
does not execute,why?

thanks
fengxin

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Re: Dvico Dual 4 card not working.

[Ben Caldwell]

On Tue, Apr 1, 2008 at 10:31 AM, Nicholas Magers <
Nicholas.Magers@lands.nsw.gov.au> wrote:

>  I'll be interested in the result.
>

After much plodding through changesets I have something to report. It seems
that the the dvico dual digital 4 card is broken in changesets after
d4df22377e83 (11 days ago).
It is interesting to note that the next change (the one that breaks it) is
"Removes video_dev from tuner-xc3028 config struct" - the dvico dual digital
4 has an xc3028.

So to get it working:
*hg update -r d4df22377e83
make clean
make rminstall
make release
make
make install*

Then reboot. One other interesting thing I have found is that sometimes
after compiling new modules I actually have to turn the PC off then on again
(rather than just a reboot) to get everything working properly.

- Ben
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Re: Dvico Dual 4 card not working.

[Michael Krufky]

[-- Attachment #1: Type: text/plain, Size: 2435 bytes --]

On Tue, Apr 1, 2008 at 11:41 AM, Ben Caldwell <benny.caldwell@gmail.com> wrote:
> On Tue, Apr 1, 2008 at 10:31 AM, Nicholas Magers <
>  After much plodding through changesets I have something to report. It seems
>  that the the dvico dual digital 4 card is broken in changesets after
>  d4df22377e83 (11 days ago).
>  It is interesting to note that the next change (the one that breaks it) is
>  "Removes video_dev from tuner-xc3028 config struct" - the dvico dual digital
>  4 has an xc3028.
>
>  So to get it working:
>  *hg update -r d4df22377e83
>  make clean
>  make rminstall
>  make release
>  make
>  make install*
>
>  Then reboot. One other interesting thing I have found is that sometimes
>  after compiling new modules I actually have to turn the PC off then on again
>  (rather than just a reboot) to get everything working properly.
>
>  - Ben


Can you try using the v4l-dvb master branch hg repository on
linuxtv.org again, after applying the attached patch (see below)

It is clear what went wrong on the Dual Digital 4 --

Mauro did some changes recently that use a "magic number" (yuck) to
differentiate between devices and manage multiple instances of the
xc2028 driver on a hybrid design.

He used i2c_adapter->algo_data to generate this "magic number" ,
which, IMHO is a very bad idea, especially since some digital-only
devices do not even define algo_data.  On the other hand,
i2c_adap->algo_data is a reasonable structure to use for the
"video_dev" pointer in the tuner_callback function, *if* it is
defined.

The patch in the link above uses the 'hybrid_tuner_request_state"
method to manage multiple instances of the device driver on a hybrid
design.  This uses a *much* safer method, using the i2c_adapter ID
along with the device i2c address to identify unique instances.  For
the "video_dev" pointer, the patch also uses a safer method:  If the
dvb_adapter device is defined, use fe->dvb->priv, otherwise, fall back
to Mauro's previous method of using i2c_adap->algo_data.

Please note:  This patch is intended for testing purposes only --
there is a remaining issue in this patch, where it doesn't destroy
some memory properly when tuner instances are destroyed.  I'll be
happy to fix that remaining issue after I receive some reports that
the larger issue is actually remedied by this patch.

Please let me know if this fixes the problem, and I'll produce a new
patch afterwards.

Regards,

Mike Krufky

[-- Warning: decoded text below may be mangled, UTF-8 assumed --]
[-- Attachment #2: xc-instance.patch --]
[-- Type: text/x-diff; name=xc-instance.patch, Size: 3767 bytes --]

diff -r 0776e4801991 linux/drivers/media/video/tuner-xc2028.c
--- a/linux/drivers/media/video/tuner-xc2028.c	Fri Mar 28 14:52:44 2008 -0300
+++ b/linux/drivers/media/video/tuner-xc2028.c	Tue Apr 01 15:57:38 2008 -0400
@@ -57,7 +57,7 @@ MODULE_PARM_DESC(firmware_name, "Firmwar
 MODULE_PARM_DESC(firmware_name, "Firmware file name. Allows overriding the "
 				"default firmware name\n");
 
-static LIST_HEAD(xc2028_list);
+static LIST_HEAD(hybrid_tuner_instance_list);
 static DEFINE_MUTEX(xc2028_list_mutex);
 
 /* struct for storing firmware table */
@@ -79,12 +79,11 @@ struct firmware_properties {
 };
 
 struct xc2028_data {
-	struct list_head        xc2028_list;
+	struct list_head        hybrid_tuner_instance_list;
 	struct tuner_i2c_props  i2c_props;
 	int                     (*tuner_callback) (void *dev,
 						   int command, int arg);
 	void			*video_dev;
-	int			count;
 	__u32			frequency;
 
 	struct firmware_description *firm;
@@ -1095,19 +1094,12 @@ static int xc2028_dvb_release(struct dvb
 
 	mutex_lock(&xc2028_list_mutex);
 
-	priv->count--;
-
-	if (!priv->count) {
-		list_del(&priv->xc2028_list);
-
-		kfree(priv->ctrl.fname);
-
-		free_firmware(priv);
-		kfree(priv);
-		fe->tuner_priv = NULL;
-	}
+	if (priv)
+		hybrid_tuner_release_state(priv);
 
 	mutex_unlock(&xc2028_list_mutex);
+
+	fe->tuner_priv = NULL;
 
 	return 0;
 }
@@ -1179,7 +1171,7 @@ struct dvb_frontend *xc2028_attach(struc
 				   struct xc2028_config *cfg)
 {
 	struct xc2028_data *priv;
-	void               *video_dev;
+	int instance;
 
 	if (debug)
 		printk(KERN_DEBUG "xc2028: Xcv2028/3028 init called!\n");
@@ -1192,48 +1184,40 @@ struct dvb_frontend *xc2028_attach(struc
 		return NULL;
 	}
 
-	video_dev = cfg->i2c_adap->algo_data;
-
-	if (debug)
-		printk(KERN_DEBUG "xc2028: video_dev =%p\n", video_dev);
-
 	mutex_lock(&xc2028_list_mutex);
 
-	list_for_each_entry(priv, &xc2028_list, xc2028_list) {
-		if (&priv->i2c_props.adap->dev == &cfg->i2c_adap->dev) {
-			video_dev = NULL;
-			if (debug)
-				printk(KERN_DEBUG "xc2028: reusing device\n");
-
-			break;
-		}
-	}
-
-	if (video_dev) {
-		priv = kzalloc(sizeof(*priv), GFP_KERNEL);
-		if (priv == NULL) {
-			mutex_unlock(&xc2028_list_mutex);
-			return NULL;
-		}
-
-		priv->i2c_props.addr = cfg->i2c_addr;
-		priv->i2c_props.adap = cfg->i2c_adap;
-		priv->i2c_props.name = "xc2028";
-
-		priv->video_dev = video_dev;
+	instance = hybrid_tuner_request_state(struct xc2028_data, priv,
+					      hybrid_tuner_instance_list,
+					      cfg->i2c_adap, cfg->i2c_addr,
+					      "xc2028");
+	switch (instance) {
+	case 0:
+		/* memory allocation failure */
+		goto fail;
+		break;
+	case 1:
+		/* new tuner instance */
 		priv->tuner_callback = cfg->callback;
 		priv->ctrl.max_len = 13;
 
 		mutex_init(&priv->lock);
 
-		list_add_tail(&priv->xc2028_list, &xc2028_list);
-	}
-
-	fe->tuner_priv = priv;
-	priv->count++;
-
-	if (debug)
-		printk(KERN_DEBUG "xc2028: usage count is %i\n", priv->count);
+		/* analog side (tuner-core) uses i2c_adap->algo_data.
+		 * digital side is not guaranteed to have algo_data defined.
+		 *
+		 * digital side will always have fe->dvb defined.
+		 * analog side (tuner-core) doesn't (yet) define fe->dvb.
+		 */
+		priv->video_dev = ((fe->dvb) && (fe->dvb->priv)) ?
+				   fe->dvb->priv : cfg->i2c_adap->algo_data;
+
+		fe->tuner_priv = priv;
+		break;
+	case 2:
+		/* existing tuner instance */
+		fe->tuner_priv = priv;
+		break;
+	}
 
 	memcpy(&fe->ops.tuner_ops, &xc2028_dvb_tuner_ops,
 	       sizeof(xc2028_dvb_tuner_ops));
@@ -1246,6 +1230,11 @@ struct dvb_frontend *xc2028_attach(struc
 	mutex_unlock(&xc2028_list_mutex);
 
 	return fe;
+fail:
+	mutex_unlock(&xc2028_list_mutex);
+
+	xc2028_dvb_release(fe);
+	return NULL;
 }
 
 EXPORT_SYMBOL(xc2028_attach);

[-- Attachment #3: Type: text/plain, Size: 164 bytes --]

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