V4L/DVB (6723): tda18271: only force init once during attach

Once the image rejection calibration procedure has been successful,
we should not initialize the tuner registers again.

Signed-off-by: Michael Krufky <mkrufky@linuxtv.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>

1 files changed, 17 insertions, 1 deletions

diff --git a/drivers/media/dvb/frontends/tda18271-fe.c b/drivers/media/dvb/frontends/tda18271-fe.c
index 726e102cbc5d..25c127f67c22 100644
--- a/drivers/media/dvb/frontends/tda18271-fe.c
+++ b/drivers/media/dvb/frontends/tda18271-fe.c
@@ -337,6 +337,20 @@ static int tda18271_init_regs(struct dvb_frontend *fe)
         return 0;
 }
 
+static int tda18271_init(struct dvb_frontend *fe)
+{
+        struct tda18271_priv *priv = fe->tuner_priv;
+        unsigned char *regs = priv->tda18271_regs;
+
+        tda18271_read_regs(fe);
+
+        /* test IR_CAL_OK to see if we need init */
+        if ((regs[R_EP1] & 0x08) == 0)
+                tda18271_init_regs(fe);
+
+        return 0;
+}
+
 static int tda18271_tune(struct dvb_frontend *fe,
                          u32 ifc, u32 freq, u32 bw, u8 std)
 {
@@ -742,7 +756,7 @@ static struct dvb_tuner_ops tda18271_tuner_ops = {
                 .frequency_max  = 864000000,
                 .frequency_step =     62500
         },
-        .init              = tda18271_init_regs,
+        .init              = tda18271_init,
         .set_params        = tda18271_set_params,
         .set_analog_params = tda18271_set_analog_params,
         .release           = tda18271_release,
@@ -768,6 +782,8 @@ struct dvb_frontend *tda18271_attach(struct dvb_frontend *fe, u8 addr,
 
         fe->tuner_priv = priv;
 
+        tda18271_init_regs(fe);
+
         return fe;
 }
 EXPORT_SYMBOL_GPL(tda18271_attach);