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SubjectRe: linux-next: Tree for January 5 (multimedia #3)
On Wed, 07 Jan 2009 10:34:11 -0800
Randy Dunlap <randy.dunlap@oracle.com> wrote:

> Mauro Carvalho Chehab wrote:
> > On Mon, 5 Jan 2009 12:09:27 -0800
> > Randy Dunlap <randy.dunlap@oracle.com> wrote:
> >
> >> On Mon, 5 Jan 2009 17:35:17 +1100 Stephen Rothwell wrote:
> >>
> >>> Hi all,
> >>>
> >>> This tree will not build a powerpc ppc4xx_defconfig due to a kvm problem.
> >>>
> >>> Changes since 20090102:
> >>
> >> drivers/built-in.o: In function `cx88_call_i2c_clients':
> >> (.text+0x20af17): undefined reference to `videobuf_dvb_get_frontend'
> >> drivers/built-in.o: In function `cx8802_probe':
> >> cx88-mpeg.c:(.devinit.text+0x268c4): undefined reference to `videobuf_dvb_alloc_frontend'
> >> cx88-mpeg.c:(.devinit.text+0x268ea): undefined reference to `videobuf_dvb_dealloc_frontends'
> >
> > This one were trickier. Patch enclosed.
> >
> > Cheers,
> > Mauro
>
> Hi Mauro,
>
> After applying this patch, now I get these build errors:
>
> drivers/built-in.o: In function `mpeg_release':
> cx88-blackbird.c:(.text+0x21096d): undefined reference to `cx8802_cancel_buffers'
> cx88-blackbird.c:(.text+0x2109a3): undefined reference to `cx8802_get_device'
> cx88-blackbird.c:(.text+0x2109bd): undefined reference to `cx8802_get_driver'
> drivers/built-in.o: In function `bb_buf_queue':
> cx88-blackbird.c:(.text+0x210a06): undefined reference to `cx8802_buf_queue'
> drivers/built-in.o: In function `bb_buf_prepare':
> cx88-blackbird.c:(.text+0x210a25): undefined reference to `cx8802_buf_prepare'
> drivers/built-in.o: In function `mpeg_open':
> cx88-blackbird.c:(.text+0x210a59): undefined reference to `cx8802_get_device'
> cx88-blackbird.c:(.text+0x210aa2): undefined reference to `cx8802_get_driver'
> drivers/built-in.o: In function `blackbird_init':
> cx88-blackbird.c:(.text+0x210d18): undefined reference to `cx8802_register_driver'
> drivers/built-in.o: In function `blackbird_fini':
> cx88-blackbird.c:(.text+0x210fbc): undefined reference to `cx8802_unregister_driver'


Sorry, I sent the wrong version. The correct one is here. Btw, I've committed
it yesterday on my linux-next tree. It is likely that it were already added upstream.

Cheers,
Mauro.

commit 3adb75fc5c8b2b0401e51067db07992d616c7711
Author: Mauro Carvalho Chehab <mchehab@redhat.com>
Date: Tue Jan 6 16:06:07 2009 -0300

V4L/DVB (10190): cx88: Fix some Kbuild troubles

As Randy Dunlap <randy.dunlap@oracle.com> reported, cx88 has some compilation issues:

drivers/built-in.o: In function `cx88_call_i2c_clients':
(.text+0x20af17): undefined reference to `videobuf_dvb_get_frontend'
drivers/built-in.o: In function `cx8802_probe':
cx88-mpeg.c:(.devinit.text+0x268c4): undefined reference to `videobuf_dvb_alloc_frontend'
cx88-mpeg.c:(.devinit.text+0x268ea): undefined reference to `videobuf_dvb_dealloc_frontends'

With those configs:

CONFIG_VIDEO_CX88=y
CONFIG_VIDEO_CX88_BLACKBIRD=y
CONFIG_VIDEO_CX88_DVB=m
CONFIG_DVB_CORE=m

After carefully examining the code, with the current code, several cx88 drivers
(cx8800, cx8802, cx88_dvb and cx88_blackbird) should be compiled as a module,
if one of them is marked as such. Just fixing Kconfig could create a very complex
set of rules. Also, this hides a problem with the current approach where the dvb
functionality weren't confined inside dvb module.

What happens is that:
- cx88-i2c (part of cx8800) has some special rules if DVB;
- cx88-mpeg (cx8802 module) has also part of DVB init code;
- cx88-dvb has the rest of the dvb code;
- cx88-blackbird can be used with cx88-mpeg, having cx88-dvb or not.

So, instead of doing some tricks at Kconfig and wait for a next breakage,
this patch moves the dvb code inside cx88-i2c and cx88-mpeg into cx88-dvb.

Another problem is that cx8802 were being compiled, even without cx88-dvb
and cx88-blackbird modules.

While on this code, let's fix also a reported problem:
http://www.linuxtv.org/pipermail/linux-dvb/2009-January/031225.html

A solution for the issue were proposed here:
http://www.mail-archive.com/linux-media@vger.kernel.org/msg00021.html

Thanks to Randy, Andy, Gregoire and Thomas for helping us to detect
and solve the issues.

Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

diff --git a/drivers/media/video/cx88/Kconfig b/drivers/media/video/cx88/Kconfig
index b0f8375..2d250a2 100644
--- a/drivers/media/video/cx88/Kconfig
+++ b/drivers/media/video/cx88/Kconfig
@@ -69,6 +69,11 @@ config VIDEO_CX88_DVB
To compile this driver as a module, choose M here: the
module will be called cx88-dvb.

+config VIDEO_CX88_MPEG
+ tristate
+ depends on VIDEO_CX88_DVB || VIDEO_CX88_BLACKBIRD
+ default y
+
config VIDEO_CX88_VP3054
tristate "VP-3054 Secondary I2C Bus Support"
default m
diff --git a/drivers/media/video/cx88/Makefile b/drivers/media/video/cx88/Makefile
index 6ec30f2..b06b127 100644
--- a/drivers/media/video/cx88/Makefile
+++ b/drivers/media/video/cx88/Makefile
@@ -3,7 +3,8 @@ cx88xx-objs := cx88-cards.o cx88-core.o cx88-i2c.o cx88-tvaudio.o \
cx8800-objs := cx88-video.o cx88-vbi.o
cx8802-objs := cx88-mpeg.o

-obj-$(CONFIG_VIDEO_CX88) += cx88xx.o cx8800.o cx8802.o
+obj-$(CONFIG_VIDEO_CX88) += cx88xx.o cx8800.o
+obj-$(CONFIG_VIDEO_CX88_MPEG) += cx8802.o
obj-$(CONFIG_VIDEO_CX88_ALSA) += cx88-alsa.o
obj-$(CONFIG_VIDEO_CX88_BLACKBIRD) += cx88-blackbird.o
obj-$(CONFIG_VIDEO_CX88_DVB) += cx88-dvb.o
diff --git a/drivers/media/video/cx88/cx88-dvb.c b/drivers/media/video/cx88/cx88-dvb.c
index da4dd49..613dfea 100644
--- a/drivers/media/video/cx88/cx88-dvb.c
+++ b/drivers/media/video/cx88/cx88-dvb.c
@@ -138,6 +138,28 @@ static int cx88_dvb_bus_ctrl(struct dvb_frontend* fe, int acquire)
return ret;
}

+static void cx88_dvb_gate_ctrl(struct cx88_core *core, int open)
+{
+ struct videobuf_dvb_frontends *f;
+ struct videobuf_dvb_frontend *fe;
+
+ if (!core->dvbdev)
+ return;
+
+ f = &core->dvbdev->frontends;
+
+ if (!f)
+ return;
+
+ if (f->gate <= 1) /* undefined or fe0 */
+ fe = videobuf_dvb_get_frontend(f, 1);
+ else
+ fe = videobuf_dvb_get_frontend(f, f->gate);
+
+ if (fe && fe->dvb.frontend && fe->dvb.frontend->ops.i2c_gate_ctrl)
+ fe->dvb.frontend->ops.i2c_gate_ctrl(fe->dvb.frontend, open);
+}
+
/* ------------------------------------------------------------------ */

static int dvico_fusionhdtv_demod_init(struct dvb_frontend* fe)
@@ -597,12 +619,30 @@ 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)
@@ -611,6 +651,9 @@ static int dvb_register(struct cx8802_dev *dev)
/* multi-frontend gate control is undefined or defaults to fe0 */
dev->frontends.gate = 0;

+ /* Sets the gate control callback to be used by i2c command calls */
+ core->gate_ctrl = cx88_dvb_gate_ctrl;
+
/* init frontend(s) */
switch (core->boardnr) {
case CX88_BOARD_HAUPPAUGE_DVB_T1:
@@ -1109,6 +1152,7 @@ static int dvb_register(struct cx8802_dev *dev)
&dev->pci->dev, adapter_nr, mfe_shared);

frontend_detach:
+ core->gate_ctrl = NULL;
videobuf_dvb_dealloc_frontends(&dev->frontends);
return -EINVAL;
}
@@ -1270,6 +1314,8 @@ static int cx8802_dvb_remove(struct cx8802_driver *drv)

vp3054_i2c_remove(dev);

+ core->gate_ctrl = NULL;
+
return 0;
}

diff --git a/drivers/media/video/cx88/cx88-i2c.c b/drivers/media/video/cx88/cx88-i2c.c
index 1ab691d..c0ff230 100644
--- a/drivers/media/video/cx88/cx88-i2c.c
+++ b/drivers/media/video/cx88/cx88-i2c.c
@@ -116,30 +116,16 @@ static int detach_inform(struct i2c_client *client)

void cx88_call_i2c_clients(struct cx88_core *core, unsigned int cmd, void *arg)
{
-#if defined(CONFIG_VIDEO_CX88_DVB) || defined(CONFIG_VIDEO_CX88_DVB_MODULE)
- struct videobuf_dvb_frontends *f = &core->dvbdev->frontends;
- struct videobuf_dvb_frontend *fe = NULL;
-#endif
if (0 != core->i2c_rc)
return;

-#if defined(CONFIG_VIDEO_CX88_DVB) || defined(CONFIG_VIDEO_CX88_DVB_MODULE)
- if (core->dvbdev && f) {
- if(f->gate <= 1) /* undefined or fe0 */
- fe = videobuf_dvb_get_frontend(f, 1);
- else
- fe = videobuf_dvb_get_frontend(f, f->gate);
+ if (core->gate_ctrl)
+ core->gate_ctrl(core, 1);

- if (fe && fe->dvb.frontend && fe->dvb.frontend->ops.i2c_gate_ctrl)
- fe->dvb.frontend->ops.i2c_gate_ctrl(fe->dvb.frontend, 1);
+ i2c_clients_command(&core->i2c_adap, cmd, arg);

- i2c_clients_command(&core->i2c_adap, cmd, arg);
-
- if (fe && fe->dvb.frontend && fe->dvb.frontend->ops.i2c_gate_ctrl)
- fe->dvb.frontend->ops.i2c_gate_ctrl(fe->dvb.frontend, 0);
- } else
-#endif
- i2c_clients_command(&core->i2c_adap, cmd, arg);
+ if (core->gate_ctrl)
+ core->gate_ctrl(core, 0);
}

static const struct i2c_algo_bit_data cx8800_i2c_algo_template = {
diff --git a/drivers/media/video/cx88/cx88-mpeg.c b/drivers/media/video/cx88/cx88-mpeg.c
index 59164fc..b295b76 100644
--- a/drivers/media/video/cx88/cx88-mpeg.c
+++ b/drivers/media/video/cx88/cx88-mpeg.c
@@ -787,6 +787,9 @@ static int __devinit cx8802_probe(struct pci_dev *pci_dev,
dev->pci = pci_dev;
dev->core = core;

+ /* Maintain a reference so cx88-video can query the 8802 device. */
+ core->dvbdev = dev;
+
err = cx8802_init_common(dev);
if (err != 0)
goto fail_free;
@@ -794,32 +797,6 @@ static int __devinit cx8802_probe(struct pci_dev *pci_dev,
INIT_LIST_HEAD(&dev->drvlist);
list_add_tail(&dev->devlist,&cx8802_devlist);

-#if defined(CONFIG_VIDEO_CX88_DVB) || defined(CONFIG_VIDEO_CX88_DVB_MODULE)
- mutex_init(&dev->frontends.lock);
- INIT_LIST_HEAD(&dev->frontends.felist);
-
- if (core->board.num_frontends) {
- struct videobuf_dvb_frontend *fe;
- int i;
-
- 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 == NULL) {
- printk(KERN_ERR "%s() failed to alloc\n",
- __func__);
- videobuf_dvb_dealloc_frontends(&dev->frontends);
- err = -ENOMEM;
- goto fail_free;
- }
- }
- }
-#endif
-
- /* Maintain a reference so cx88-video can query the 8802 device. */
- core->dvbdev = dev;
-
/* now autoload cx88-dvb or cx88-blackbird */
request_modules(dev);
return 0;
@@ -827,6 +804,7 @@ static int __devinit cx8802_probe(struct pci_dev *pci_dev,
fail_free:
kfree(dev);
fail_core:
+ core->dvbdev = NULL;
cx88_core_put(core,pci_dev);
return err;
}
diff --git a/drivers/media/video/cx88/cx88.h b/drivers/media/video/cx88/cx88.h
index eb9ce30..60a8b31 100644
--- a/drivers/media/video/cx88/cx88.h
+++ b/drivers/media/video/cx88/cx88.h
@@ -302,6 +302,7 @@ struct cx88_dmaqueue {
struct btcx_riscmem stopper;
u32 count;
};
+struct cx88_core;

struct cx88_core {
struct list_head devlist;
@@ -334,7 +335,8 @@ struct cx88_core {

/* config info -- dvb */
#if defined(CONFIG_VIDEO_CX88_DVB) || defined(CONFIG_VIDEO_CX88_DVB_MODULE)
- int (*prev_set_voltage)(struct dvb_frontend* fe, fe_sec_voltage_t voltage);
+ int (*prev_set_voltage)(struct dvb_frontend *fe, fe_sec_voltage_t voltage);
+ void (*gate_ctrl)(struct cx88_core *core, int open);
#endif

/* state info */



Cheers,
Mauro


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