Re: [PATCH] mn88472: implement lock for all delivery systems

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Hello.

On 12/16/2014 04:34 AM, Antti Palosaari wrote:
Moikka!

On 12/16/2014 01:40 AM, Benjamin Larsson wrote:
Signed-off-by: Benjamin Larsson <benjamin@xxxxxxxxxxxx>
---
  drivers/staging/media/mn88472/mn88472.c | 23 ++++++++++++++++++++---
  1 file changed, 20 insertions(+), 3 deletions(-)

diff --git a/drivers/staging/media/mn88472/mn88472.c b/drivers/staging/media/mn88472/mn88472.c
index 68f5036..426f0ed 100644
--- a/drivers/staging/media/mn88472/mn88472.c
+++ b/drivers/staging/media/mn88472/mn88472.c
@@ -238,6 +238,7 @@ static int mn88472_read_status(struct dvb_frontend *fe, fe_status_t *status)
      struct dtv_frontend_properties *c = &fe->dtv_property_cache;
      int ret;
      unsigned int utmp;
+    int lock = 0;

      *status = 0;

@@ -248,21 +249,37 @@ static int mn88472_read_status(struct dvb_frontend *fe, fe_status_t *status)

      switch (c->delivery_system) {
      case SYS_DVBT:
+        ret = regmap_read(dev->regmap[0], 0x7F, &utmp);
+        if (ret)
+            goto err;
+        if ((utmp&0xF) > 8)

You didn't read Kernel coding style doc?

around line 206 Documentation/CodingStyle
---------------------------
Use one space around (on each side of) most binary and ternary operators,
such as any of these:

    =  +  -  <  >  *  /  %  |  &  ^  <=  >=  == !=  ?  :
---------------------------

Fixed.


+            lock = 1;
+        break;
      case SYS_DVBT2:
-        /* FIXME: implement me */
-        utmp = 0x08; /* DVB-C lock value */
+        msleep(150);

This sleep does not look correct. Why it is here? In order to provide more time for lock waiting? In that case you must increase .get_tune_settings() timeout. On some other case you will need to add comment why such strange thing is needed.

Increased.


+        ret = regmap_read(dev->regmap[2], 0x92, &utmp);
+        if (ret)
+            goto err;
+        if ((utmp&0xF) >= 0x07)
+            *status |= FE_HAS_SIGNAL;
+        if ((utmp&0xF) >= 0x0a)
+            *status |= FE_HAS_CARRIER;
+        if ((utmp&0xF) >= 0x0d)
+            *status |= FE_HAS_VITERBI | FE_HAS_SYNC | FE_HAS_LOCK;
          break;
      case SYS_DVBC_ANNEX_A:
          ret = regmap_read(dev->regmap[1], 0x84, &utmp);
          if (ret)
              goto err;
+        if ((utmp&0xF) > 7)
+            lock = 1;
          break;
      default:
          ret = -EINVAL;
          goto err;
      }

-    if (utmp == 0x08)
+    if (lock)
          *status = FE_HAS_SIGNAL | FE_HAS_CARRIER | FE_HAS_VITERBI |
                  FE_HAS_SYNC | FE_HAS_LOCK;

Antti


Sent v2 patch.

MvH
Benjamin Larsson
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