2 files changed, 40 insertions, 0 deletions

diff --git a/drivers/media/dvb/frontends/dvb-pll.c b/drivers/media/dvb/frontends/dvb-pll.c
index 43084bfc0f18..e7978442fbe9 100644
--- a/drivers/media/dvb/frontends/dvb-pll.c
+++ b/drivers/media/dvb/frontends/dvb-pll.c
@@ -27,6 +27,17 @@
 /* ----------------------------------------------------------- */
 /* descriptions                                                */
 
+/* Set AGC TOP value to 103 dBuV:
+        0x80 = Control Byte
+        0x40 = 250 uA charge pump (irrelevant)
+        0x18 = Aux Byte to follow
+        0x06 = 64.5 kHz divider (irrelevant)
+        0x01 = Disable Vt (aka sleep)
+
+        0x00 = AGC Time constant 2s Iagc = 300 nA (vs 0x80 = 9 nA)
+        0x50 = AGC Take over point = 103 dBuV */
+static u8 tua603x_agc103[] = { 2, 0x80|0x40|0x18|0x06|0x01, 0x00|0x50 };
+
 struct dvb_pll_desc dvb_pll_thomson_dtt7579 = {
         .name  = "Thomson dtt7579",
         .min   = 177000000,
@@ -113,6 +124,7 @@ struct dvb_pll_desc dvb_pll_thomson_dtt761x = {
         .min   =  57000000,
         .max   = 863000000,
         .count = 3,
+        .initdata = tua603x_agc103,
         .entries = {
                 { 147000000, 44000000, 62500, 0x8e, 0x39 },
                 { 417000000, 44000000, 62500, 0x8e, 0x3a },
@@ -599,6 +611,31 @@ static int dvb_pll_get_bandwidth(struct dvb_frontend *fe, u32 *bandwidth)
         return 0;
 }
 
+static int dvb_pll_init(struct dvb_frontend *fe)
+{
+        struct dvb_pll_priv *priv = fe->tuner_priv;
+
+        if (priv->i2c == NULL)
+                return -EINVAL;
+
+        if (priv->pll_desc->initdata) {
+                struct i2c_msg msg = { .flags = 0,
+                        .addr = priv->pll_i2c_address,
+                        .buf = priv->pll_desc->initdata + 1,
+                        .len = priv->pll_desc->initdata[0] };
+
+                int result;
+                if (fe->ops.i2c_gate_ctrl)
+                        fe->ops.i2c_gate_ctrl(fe, 1);
+                if ((result = i2c_transfer(priv->i2c, &msg, 1)) != 1) {
+                        return result;
+                }
+                return 0;
+        }
+        /* Shouldn't be called when initdata is NULL, maybe BUG()? */
+        return -EINVAL;
+}
+
 static struct dvb_tuner_ops dvb_pll_tuner_ops = {
         .release = dvb_pll_release,
         .sleep = dvb_pll_sleep,
@@ -644,6 +681,8 @@ struct dvb_frontend *dvb_pll_attach(struct dvb_frontend *fe, int pll_addr,
                 sizeof(fe->ops.tuner_ops.info.name));
         fe->ops.tuner_ops.info.frequency_min = desc->min;
         fe->ops.tuner_ops.info.frequency_min = desc->max;
+        if (desc->initdata)
+                fe->ops.tuner_ops.init = dvb_pll_init;
 
         fe->tuner_priv = priv;
         return fe;
diff --git a/drivers/media/dvb/frontends/dvb-pll.h b/drivers/media/dvb/frontends/dvb-pll.h
index a5bd928d4202..bb79a78151f5 100644
--- a/drivers/media/dvb/frontends/dvb-pll.h
+++ b/drivers/media/dvb/frontends/dvb-pll.h
@@ -13,6 +13,7 @@ struct dvb_pll_desc {
         u32  min;
         u32  max;
         void (*setbw)(u8 *buf, u32 freq, int bandwidth);
+        u8   *initdata;
         int  count;
         struct {
                 u32 limit;