On 11/15/2011 12:25 AM, Malcolm Priestley wrote:
On 11/13/2011 09:05 PM, Antti Palosaari wrote:
AF9015 firmware does not like if it gets interrupted by I2C adapter
request on some critical phases. During normal operation I2C adapter
is used only 2nd demodulator and tuner on dual tuner devices.
Override demodulator callbacks and use mutex for limit access to
those "critical" paths to keep AF9015 happy.
I have tried this patch, while it initially got MythTV working, there is
too many call backs and some failed to acquire the lock. The device
became unstable on both single and dual devices.
The callbacks
af9015_af9013_read_status,
af9015_af9013_init
af9015_af9013_sleep
had to be removed.
init and sleep are called very rarely, only when open or close device.
If that mutex locking cause problems it is most likely high I2C I/O +
some waiting due to mux => we have more I/O than we can handle.
I take your point, a call back can be an alternative.
The patch didn't stop the firmware fails either.
You mean the loading fw to 2nd FE? I didn't done nothing for that.
The af9015 usb bridge on the whole is so unstable in its early stages,
especially on a cold boot and when the USB controller has another device
on it, such as card reader or wifi device.
I am, at the moment looking to see if the fails are due to interface 1
being claimed by HID.
I still suspect corruptions to stream are coming from too high I2C
traffic. I have feeling those who always squawk are just MythTV users,
so maybe it is MythTV that does some very much polls and channel changes.
I added patch I tested reducing I2C I/O. Feel free to test.
I can try to optimize af9013 next weekend if we found it is one stream
corruption cause.
Antti
--
http://palosaari.fi/
diff --git a/drivers/media/dvb/frontends/af9013.c
b/drivers/media/dvb/frontends/af9013.c
index f4276e4..4694f4b 100644
--- a/drivers/media/dvb/frontends/af9013.c
+++ b/drivers/media/dvb/frontends/af9013.c
@@ -50,6 +50,8 @@ struct af9013_state {
u16 snr;
u32 frequency;
unsigned long next_statistics_check;
+
+ u8 fe_set;
};
static u8 regmask[8] = { 0x01, 0x03, 0x07, 0x0f, 0x1f, 0x3f, 0x7f, 0xff };
@@ -606,19 +608,29 @@ static int af9013_set_frontend(struct dvb_frontend *fe,
state->frequency = params->frequency;
+ /* Stop OFSM */ // from Malcom
+ ret = af9013_write_reg(state, 0xffff, 1);
+ if (ret)
+ goto error;
+
/* program tuner */
if (fe->ops.tuner_ops.set_params)
fe->ops.tuner_ops.set_params(fe, params);
- /* program CFOE coefficients */
- ret = af9013_set_coeff(state, params->u.ofdm.bandwidth);
- if (ret)
- goto error;
+ if (!state->fe_set) {
- /* program frequency control */
- ret = af9013_set_freq_ctrl(state, fe);
- if (ret)
- goto error;
+ /* program CFOE coefficients */
+ ret = af9013_set_coeff(state, params->u.ofdm.bandwidth);
+ if (ret)
+ goto error;
+
+ /* program frequency control */
+ ret = af9013_set_freq_ctrl(state, fe);
+ if (ret)
+ goto error;
+
+ state->fe_set = 1;
+ }
/* clear TPS lock flag (inverted flag) */
ret = af9013_write_reg_bits(state, 0xd330, 3, 1, 1);
@@ -917,6 +929,7 @@ static int af9013_update_snr(struct dvb_frontend *fe)
if (ret)
goto error;
+#if 0
/* check quantizer availability */
for (i = 0; i < 10; i++) {
msleep(10);
@@ -927,7 +940,7 @@ static int af9013_update_snr(struct dvb_frontend *fe)
if (!buf[0])
break;
}
-
+#endif
/* reset quantizer */
ret = af9013_write_reg_bits(state, 0xd2e1, 3, 1, 1);
if (ret)
@@ -978,6 +991,8 @@ static int af9013_update_statistics(struct dvb_frontend *fe)
struct af9013_state *state = fe->demodulator_priv;
int ret;
+ return 0;
+
if (time_before(jiffies, state->next_statistics_check))
return 0;
@@ -1015,6 +1030,15 @@ static int af9013_read_status(struct dvb_frontend *fe,
fe_status_t *status)
u8 tmp;
*status = 0;
+
+ if (state->config.output_mode == AF9013_OUTPUT_MODE_USB) {
+ *status |= FE_HAS_SIGNAL | FE_HAS_CARRIER | FE_HAS_VITERBI |
FE_HAS_SYNC | FE_HAS_LOCK;
+ } else {
+ *status |= FE_HAS_SIGNAL | FE_HAS_CARRIER | FE_HAS_VITERBI |
FE_HAS_SYNC | FE_HAS_LOCK;
+// *status = 0;
+ }
+
+#if 0
/* MPEG2 lock */
ret = af9013_read_reg_bits(state, 0xd507, 6, 1, &tmp);
if (ret)
@@ -1061,6 +1085,7 @@ static int af9013_read_status(struct dvb_frontend *fe,
fe_status_t *status)
}
ret = af9013_update_statistics(fe);
+#endif
error:
return ret;
@@ -1109,11 +1134,14 @@ static int af9013_sleep(struct dvb_frontend *fe)
int ret;
deb_info("%s\n", __func__);
+ state->fe_set = 0;
+
ret = af9013_lock_led(state, 0);
if (ret)
goto error;
ret = af9013_power_ctrl(state, 0);
+
error:
return ret;
}
@@ -1126,6 +1154,9 @@ static int af9013_init(struct dvb_frontend *fe)
struct regdesc *init;
deb_info("%s\n", __func__);
+ state->fe_set = 0;
+
+
/* reset OFDM */
ret = af9013_reset(state, 0);
if (ret)
@@ -1292,6 +1323,8 @@ static int af9013_init(struct dvb_frontend *fe)
goto error;
}
+ ret = af9013_write_reg(state, 0xd503, 0x0);
+
error:
return ret;
}
@@ -1530,7 +1563,7 @@ static struct dvb_frontend_ops af9013_ops = {
.i2c_gate_ctrl = af9013_i2c_gate_ctrl,
.set_frontend = af9013_set_frontend,
- .get_frontend = af9013_get_frontend,
+// .get_frontend = af9013_get_frontend,
.get_tune_settings = af9013_get_tune_settings,
