I added few comments for things what I was a little but unsure. Please
comment.
On 10/01/2012 03:35 AM, Antti Palosaari wrote:
* use dvb property cache
* implement get
* LNA_AUTO value changed
Hans and Mauro proposed use of cache implementation of get as they
were planning to extend LNA usage for analog side too.
LNA_AUTO value was changed from (~0U) to INT_MIN as (~0U) resulted
only -1 which is waste of numeric range if need to extend that in
the future.
Reported-by: Hans Verkuil <hverk...@xs4all.nl>
Reported-by: Mauro Carvalho Chehab <mche...@redhat.com>
Signed-off-by: Antti Palosaari <cr...@iki.fi>
---
drivers/media/dvb-core/dvb_frontend.c | 18 ++++++++++++++----
drivers/media/dvb-core/dvb_frontend.h | 4 +++-
drivers/media/usb/em28xx/em28xx-dvb.c | 9 +++++----
include/linux/dvb/frontend.h | 2 +-
4 files changed, 23 insertions(+), 10 deletions(-)
diff --git a/drivers/media/dvb-core/dvb_frontend.c
b/drivers/media/dvb-core/dvb_frontend.c
index 8f58f24..246a3c5 100644
--- a/drivers/media/dvb-core/dvb_frontend.c
+++ b/drivers/media/dvb-core/dvb_frontend.c
@@ -966,6 +966,8 @@ static int dvb_frontend_clear_cache(struct dvb_frontend *fe)
break;
}
+ c->lna = LNA_AUTO;
+
return 0;
}
@@ -1054,6 +1056,8 @@ static struct dtv_cmds_h dtv_cmds[DTV_MAX_COMMAND + 1] = {
_DTV_CMD(DTV_ATSCMH_SCCC_CODE_MODE_B, 0, 0),
_DTV_CMD(DTV_ATSCMH_SCCC_CODE_MODE_C, 0, 0),
_DTV_CMD(DTV_ATSCMH_SCCC_CODE_MODE_D, 0, 0),
+
+ _DTV_CMD(DTV_LNA, 0, 0),
};
static void dtv_property_dump(struct dvb_frontend *fe, struct dtv_property
*tvp)
@@ -1440,6 +1444,10 @@ static int dtv_property_process_get(struct dvb_frontend
*fe,
tvp->u.data = fe->dtv_property_cache.atscmh_sccc_code_mode_d;
break;
+ case DTV_LNA:
+ tvp->u.data = c->lna;
+ break;
+
default:
return -EINVAL;
}
@@ -1731,10 +1739,6 @@ static int dtv_property_process_set(struct dvb_frontend
*fe,
case DTV_INTERLEAVING:
c->interleaving = tvp->u.data;
break;
- case DTV_LNA:
- if (fe->ops.set_lna)
- r = fe->ops.set_lna(fe, tvp->u.data);
- break;
/* ISDB-T Support here */
case DTV_ISDBT_PARTIAL_RECEPTION:
@@ -1806,6 +1810,12 @@ static int dtv_property_process_set(struct dvb_frontend
*fe,
fe->dtv_property_cache.atscmh_rs_frame_ensemble = tvp->u.data;
break;
+ case DTV_LNA:
+ c->lna = tvp->u.data;
+ if (fe->ops.set_lna)
+ r = fe->ops.set_lna(fe);
+ break;
+
default:
return -EINVAL;
}
diff --git a/drivers/media/dvb-core/dvb_frontend.h
b/drivers/media/dvb-core/dvb_frontend.h
index 44a445c..5d25953 100644
--- a/drivers/media/dvb-core/dvb_frontend.h
+++ b/drivers/media/dvb-core/dvb_frontend.h
@@ -303,7 +303,7 @@ struct dvb_frontend_ops {
int (*dishnetwork_send_legacy_command)(struct dvb_frontend* fe,
unsigned long cmd);
int (*i2c_gate_ctrl)(struct dvb_frontend* fe, int enable);
int (*ts_bus_ctrl)(struct dvb_frontend* fe, int acquire);
- int (*set_lna)(struct dvb_frontend *, int);
+ int (*set_lna)(struct dvb_frontend *);
/* These callbacks are for devices that implement their own
* tuning algorithms, rather than a simple swzigzag
@@ -391,6 +391,8 @@ struct dtv_frontend_properties {
u8 atscmh_sccc_code_mode_b;
u8 atscmh_sccc_code_mode_c;
u8 atscmh_sccc_code_mode_d;
+
+ int lna;
Is it reason or coincidence that all the other variables are unsigned here?
};
struct dvb_frontend {
diff --git a/drivers/media/usb/em28xx/em28xx-dvb.c
b/drivers/media/usb/em28xx/em28xx-dvb.c
index 109474b..1166e8b 100644
--- a/drivers/media/usb/em28xx/em28xx-dvb.c
+++ b/drivers/media/usb/em28xx/em28xx-dvb.c
@@ -569,15 +569,16 @@ static void pctv_520e_init(struct em28xx *dev)
i2c_master_send(&dev->i2c_client, regs[i].r, regs[i].len);
};
-static int em28xx_pctv_290e_set_lna(struct dvb_frontend *fe, int val)
+static int em28xx_pctv_290e_set_lna(struct dvb_frontend *fe)
{
+ struct dtv_frontend_properties *c = &fe->dtv_property_cache;
struct em28xx *dev = fe->dvb->priv;
#ifdef CONFIG_GPIOLIB
struct em28xx_dvb *dvb = dev->dvb;
int ret;
unsigned long flags;
- if (val)
+ if (c->lna)
flags = GPIOF_OUT_INIT_LOW;
else
flags = GPIOF_OUT_INIT_HIGH;
@@ -590,8 +591,8 @@ static int em28xx_pctv_290e_set_lna(struct dvb_frontend
*fe, int val)
return ret;
#else
- dev_warn(&dev->udev->dev, "%s: LNA control is disabled\n",
- KBUILD_MODNAME);
+ dev_warn(&dev->udev->dev, "%s: LNA control is disabled (lna=%d)\n",
+ KBUILD_MODNAME, c->lna);
return 0;
#endif
}
diff --git a/include/linux/dvb/frontend.h b/include/linux/dvb/frontend.h
index c12d452..6c97457 100644
--- a/include/linux/dvb/frontend.h
+++ b/include/linux/dvb/frontend.h
@@ -439,7 +439,7 @@ enum atscmh_rs_code_mode {
};
#define NO_STREAM_ID_FILTER (~0U)
-#define LNA_AUTO (~0U)
+#define LNA_AUTO INT_MIN
That's (INT_MIN) again here because I used int in struct
dtv_frontend_properties.
I would like to use signed value that this could be extended later like
use of attenuation.
struct dtv_cmds_h {
char *name; /* A display name for debugging purposes */
And one question still. If we use signed value for LNA then value 0
could be used as a LNA_AUTO. Like:
-1 = LNA disabled
0 = LNA AUTO
1 = LNA enabled
It is easy to change it now as it is new feature for 3.7. After that
everything goes harder, so I really would like to get comments before
-rc1 :)
regards
Antti
--
http://palosaari.fi/
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