V4L/DVB (12167): tuner-xc2028: Fix 7 MHz DVB-T

The following patch should fix 7 MHz DVB-T with the XC3028 using the
DTV7 firmware from the xc3028-v27.fw firmware image.

Tested-by: Terry Wu <terrywu2009@gmail.com>
[mchehab@redhat.com: thanks to John Ferlito, we have a real test in Australia]
Signed-off-by: Andy Walls <awalls@radix.net>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

1 files changed, 12 insertions, 1 deletions

diff --git a/drivers/media/common/tuners/tuner-xc2028.c b/drivers/media/common/tuners/tuner-xc2028.c
index b6da9c3873fe..aa20ce8cc668 100644
--- a/drivers/media/common/tuners/tuner-xc2028.c
+++ b/drivers/media/common/tuners/tuner-xc2028.c
@@ -1096,8 +1096,19 @@ static int xc2028_set_params(struct dvb_frontend *fe,
         }
 
         /* All S-code tables need a 200kHz shift */
-        if (priv->ctrl.demod)
+        if (priv->ctrl.demod) {
                 demod = priv->ctrl.demod + 200;
+                /*
+                 * The DTV7 S-code table needs a 700 kHz shift.
+                 * Thanks to Terry Wu <terrywu2009@gmail.com> for reporting this
+                 *
+                 * DTV7 is only used in Australia.  Germany or Italy may also
+                 * use this firmware after initialization, but a tune to a UHF
+                 * channel should then cause DTV78 to be used.
+                 */
+                if (type & DTV7)
+                        demod += 500;
+        }
 
         return generic_set_freq(fe, p->frequency,
                                 T_DIGITAL_TV, type, 0, demod);