[linux-dvb] [PATCH] cx88-dvb: Fix order of frontend allocations (Re: current v4l-dvb - cannot access /dev/dvb/: No such file or directory)
Mika Laitio
lamikr at pilppa.org
Mon Jan 12 17:18:46 CET 2009
> I don't have the hardware to test with. Please try this patch.
Hi
I tested the patch and it helped me to get the drivers back to normal
state! My system has hvr-1300 and hvr-4000 and only 1 lnb without diseq.
I am using 2.6.27.7 kernel and I did two test runs.
- First I build the current drivers in http://linuxtv.org/hg/v4l-dvb/
(revision http://linuxtv.org/hg/v4l-dvb/rev/036cad8c8b51)
With this driver version linux failed to boot at all.
- Then I merged your patch by hand on top of this v4l-dvb version
and I got the drivers back to normal version.
With vdr-1.6.0 I was able to tune both the dvb-t channels from hvr-1300
and dvb-s channels from hvr-4000. This vdr 1.6.0 uses old non
S2API/backward compatibility layer of the drivers. I attach your patch
just in case, as I did the merge by hand.
There is still some problem either within the S2API implementation itself
for the HVR-4000 or in the way how VDR-1.7.1, 1.7.2 and 1.7.3
uses S2API because I have not been able to use these newer VDR versions
that use S2API for tuning to S/S2 channels. Technotrend TT S2 3200 users
are however able to use these same VDR versions for tuning to S/S2
channels.
DVB-T channels from hvr-1300 tunes ok with vdr-1.7.3.
I have tested this multiple different versions of D2API drivers both from
the liplianis tree, stock drivers in 2.6.28 kernel and v4l-dvb tree.
Mika
>
> Signed-off-by: Andy Walls <awalls at radix.net>
>
> diff -r a28c39659c25 linux/drivers/media/video/cx88/cx88-dvb.c
> --- a/linux/drivers/media/video/cx88/cx88-dvb.c Sat Jan 10 16:04:45 2009 -0500
> +++ b/linux/drivers/media/video/cx88/cx88-dvb.c Sun Jan 11 19:13:10 2009 -0500
> @@ -621,33 +621,40 @@ static struct stv0288_config tevii_tuner
> .set_ts_params = cx24116_set_ts_param,
> };
>
> +static int cx8802_alloc_frontends(struct cx8802_dev *dev)
> +{
> + struct cx88_core *core = dev->core;
> + struct videobuf_dvb_frontend *fe = NULL;
> + int i;
> +
> + mutex_init(&dev->frontends.lock);
> + INIT_LIST_HEAD(&dev->frontends.felist);
> +
> + if (!core->board.num_frontends)
> + return -ENODEV;
> +
> + printk(KERN_INFO "%s() allocating %d frontend(s)\n", __func__,
> + core->board.num_frontends);
> + for (i = 1; i <= core->board.num_frontends; i++) {
> + fe = videobuf_dvb_alloc_frontend(&dev->frontends, i);
> + if (!fe) {
> + printk(KERN_ERR "%s() failed to alloc\n", __func__);
> + videobuf_dvb_dealloc_frontends(&dev->frontends);
> + return -ENOMEM;
> + }
> + }
> + return 0;
> +}
> +
> static int dvb_register(struct cx8802_dev *dev)
> {
> struct cx88_core *core = dev->core;
> struct videobuf_dvb_frontend *fe0, *fe1 = NULL;
> int mfe_shared = 0; /* bus not shared by default */
> - int i;
>
> if (0 != core->i2c_rc) {
> printk(KERN_ERR "%s/2: no i2c-bus available, cannot attach dvb drivers\n", core->name);
> goto frontend_detach;
> - }
> -
> - if (!core->board.num_frontends)
> - return -EINVAL;
> -
> - mutex_init(&dev->frontends.lock);
> - INIT_LIST_HEAD(&dev->frontends.felist);
> -
> - printk(KERN_INFO "%s() allocating %d frontend(s)\n", __func__,
> - core->board.num_frontends);
> - for (i = 1; i <= core->board.num_frontends; i++) {
> - fe0 = videobuf_dvb_alloc_frontend(&dev->frontends, i);
> - if (!fe0) {
> - printk(KERN_ERR "%s() failed to alloc\n", __func__);
> - videobuf_dvb_dealloc_frontends(&dev->frontends);
> - goto frontend_detach;
> - }
> }
>
> /* Get the first frontend */
> @@ -1253,6 +1260,8 @@ static int cx8802_dvb_probe(struct cx880
> struct cx88_core *core = drv->core;
> struct cx8802_dev *dev = drv->core->dvbdev;
> int err;
> + struct videobuf_dvb_frontend *fe;
> + int i;
>
> dprintk( 1, "%s\n", __func__);
> dprintk( 1, " ->being probed by Card=%d Name=%s, PCI %02x:%02x\n",
> @@ -1268,39 +1277,34 @@ static int cx8802_dvb_probe(struct cx880
> /* If vp3054 isn't enabled, a stub will just return 0 */
> err = vp3054_i2c_probe(dev);
> if (0 != err)
> - goto fail_probe;
> + goto fail_core;
>
> /* dvb stuff */
> printk(KERN_INFO "%s/2: cx2388x based DVB/ATSC card\n", core->name);
> dev->ts_gen_cntrl = 0x0c;
>
> + err = cx8802_alloc_frontends(dev);
> + if (err)
> + goto fail_core;
> +
> err = -ENODEV;
> - if (core->board.num_frontends) {
> - struct videobuf_dvb_frontend *fe;
> - int i;
> -
> - for (i = 1; i <= core->board.num_frontends; i++) {
> - fe = videobuf_dvb_get_frontend(&core->dvbdev->frontends, i);
> - if (fe == NULL) {
> - printk(KERN_ERR "%s() failed to get frontend(%d)\n",
> + for (i = 1; i <= core->board.num_frontends; i++) {
> + fe = videobuf_dvb_get_frontend(&core->dvbdev->frontends, i);
> + if (fe == NULL) {
> + printk(KERN_ERR "%s() failed to get frontend(%d)\n",
> __func__, i);
> - goto fail_probe;
> - }
> - videobuf_queue_sg_init(&fe->dvb.dvbq, &dvb_qops,
> + goto fail_probe;
> + }
> + videobuf_queue_sg_init(&fe->dvb.dvbq, &dvb_qops,
> &dev->pci->dev, &dev->slock,
> V4L2_BUF_TYPE_VIDEO_CAPTURE,
> V4L2_FIELD_TOP,
> sizeof(struct cx88_buffer),
> dev);
> - /* init struct videobuf_dvb */
> - fe->dvb.name = dev->core->name;
> - }
> - } else {
> - /* no frontends allocated */
> - printk(KERN_ERR "%s/2 .num_frontends should be non-zero\n",
> - core->name);
> - goto fail_core;
> + /* init struct videobuf_dvb */
> + fe->dvb.name = dev->core->name;
> }
> +
> err = dvb_register(dev);
> if (err)
> /* frontends/adapter de-allocated in dvb_register */
>
>
>
>
> _______________________________________________
> linux-dvb users mailing list
> For V4L/DVB development, please use instead linux-media at vger.kernel.org
> linux-dvb at linuxtv.org
> http://www.linuxtv.org/cgi-bin/mailman/listinfo/linux-dvb
>
-------------- next part --------------
diff -Naur v4l-dvb/linux/drivers/media/video/cx88/cx88-dvb.c v4l-dvb-patched/linux/drivers/media/video/cx88/cx88-dvb.c
--- v4l-dvb/linux/drivers/media/video/cx88/cx88-dvb.c 2009-01-12 17:55:21.000000000 +0200
+++ v4l-dvb-patched/linux/drivers/media/video/cx88/cx88-dvb.c 2009-01-12 17:55:49.000000000 +0200
@@ -621,35 +621,42 @@
.set_ts_params = cx24116_set_ts_param,
};
+static int cx8802_alloc_frontends(struct cx8802_dev *dev)
+{
+ struct cx88_core *core = dev->core;
+ struct videobuf_dvb_frontend *fe = NULL;
+ int i;
+
+ mutex_init(&dev->frontends.lock);
+ INIT_LIST_HEAD(&dev->frontends.felist);
+
+ if (!core->board.num_frontends)
+ return -ENODEV;
+
+ printk(KERN_INFO "%s() allocating %d frontend(s)\n", __func__,
+ core->board.num_frontends);
+ for (i = 1; i <= core->board.num_frontends; i++) {
+ fe = videobuf_dvb_alloc_frontend(&dev->frontends, i);
+ if (!fe) {
+ printk(KERN_ERR "%s() failed to alloc\n", __func__);
+ videobuf_dvb_dealloc_frontends(&dev->frontends);
+ return -ENOMEM;
+ }
+ }
+ return 0;
+}
+
static int dvb_register(struct cx8802_dev *dev)
{
struct cx88_core *core = dev->core;
struct videobuf_dvb_frontend *fe0, *fe1 = NULL;
int mfe_shared = 0; /* bus not shared by default */
- int i;
if (0 != core->i2c_rc) {
printk(KERN_ERR "%s/2: no i2c-bus available, cannot attach dvb drivers\n", core->name);
goto frontend_detach;
}
- if (!core->board.num_frontends)
- return -EINVAL;
-
- mutex_init(&dev->frontends.lock);
- INIT_LIST_HEAD(&dev->frontends.felist);
-
- printk(KERN_INFO "%s() allocating %d frontend(s)\n", __func__,
- core->board.num_frontends);
- for (i = 1; i <= core->board.num_frontends; i++) {
- fe0 = videobuf_dvb_alloc_frontend(&dev->frontends, i);
- if (!fe0) {
- printk(KERN_ERR "%s() failed to alloc\n", __func__);
- videobuf_dvb_dealloc_frontends(&dev->frontends);
- goto frontend_detach;
- }
- }
-
/* Get the first frontend */
fe0 = videobuf_dvb_get_frontend(&dev->frontends, 1);
if (!fe0)
@@ -1253,6 +1260,8 @@
struct cx88_core *core = drv->core;
struct cx8802_dev *dev = drv->core->dvbdev;
int err;
+ struct videobuf_dvb_frontend *fe;
+ int i;
dprintk( 1, "%s\n", __func__);
dprintk( 1, " ->being probed by Card=%d Name=%s, PCI %02x:%02x\n",
@@ -1268,39 +1277,34 @@
/* If vp3054 isn't enabled, a stub will just return 0 */
err = vp3054_i2c_probe(dev);
if (0 != err)
- goto fail_probe;
+ goto fail_core;
/* dvb stuff */
printk(KERN_INFO "%s/2: cx2388x based DVB/ATSC card\n", core->name);
dev->ts_gen_cntrl = 0x0c;
+ err = cx8802_alloc_frontends(dev);
+ if (err)
+ goto fail_core;
+
err = -ENODEV;
- if (core->board.num_frontends) {
- struct videobuf_dvb_frontend *fe;
- int i;
-
- for (i = 1; i <= core->board.num_frontends; i++) {
- fe = videobuf_dvb_get_frontend(&core->dvbdev->frontends, i);
- if (fe == NULL) {
- printk(KERN_ERR "%s() failed to get frontend(%d)\n",
+ for (i = 1; i <= core->board.num_frontends; i++) {
+ fe = videobuf_dvb_get_frontend(&core->dvbdev->frontends, i);
+ if (fe == NULL) {
+ printk(KERN_ERR "%s() failed to get frontend(%d)\n",
__func__, i);
- goto fail_probe;
- }
- videobuf_queue_sg_init(&fe->dvb.dvbq, &dvb_qops,
+ goto fail_probe;
+ }
+ videobuf_queue_sg_init(&fe->dvb.dvbq, &dvb_qops,
&dev->pci->dev, &dev->slock,
V4L2_BUF_TYPE_VIDEO_CAPTURE,
V4L2_FIELD_TOP,
sizeof(struct cx88_buffer),
dev);
- /* init struct videobuf_dvb */
- fe->dvb.name = dev->core->name;
- }
- } else {
- /* no frontends allocated */
- printk(KERN_ERR "%s/2 .num_frontends should be non-zero\n",
- core->name);
- goto fail_core;
+ /* init struct videobuf_dvb */
+ fe->dvb.name = dev->core->name;
}
+
err = dvb_register(dev);
if (err)
/* frontends/adapter de-allocated in dvb_register */
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