V4L/DVB (3889): Sort out support for non-attached tuners on mt352

Make it use set_params/pllbuf as appropriate so it works with
dvb_pll_attach()ed tuners.

Signed-off-by: Andrew de Quincey <adq_dvb@lidskialf.net>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>

1 files changed, 19 insertions, 5 deletions

diff --git a/drivers/media/dvb/frontends/mt352.c b/drivers/media/dvb/frontends/mt352.c
index a7a347a3cad..3c86018e7f9 100644
--- a/drivers/media/dvb/frontends/mt352.c
+++ b/drivers/media/dvb/frontends/mt352.c
@@ -287,18 +287,32 @@ static int mt352_set_parameters(struct dvb_frontend* fe,
         mt352_calc_nominal_rate(state, op->bandwidth, buf+4);
         mt352_calc_input_freq(state, buf+6);
 
+        // if there is no secondary tuner, call set_params to set up a potential
+        // tuner attached elsewhere
+        if (state->config.no_tuner) {
+                if (fe->ops->tuner_ops.set_params) {
+                        fe->ops->tuner_ops.set_params(fe, param);
+                        if (fe->ops->i2c_gate_ctrl) fe->ops->i2c_gate_ctrl(fe, 0);
+                }
+
+                /* start decoding only */
+                mt352_write(fe, fsm_go, 2);
+        }
+
+        // retrieve the pllbuf - we do this even if there is no
+        // secondary tuner simply so we have a record of what was sent for
+        // debugging.
         if (fe->ops->tuner_ops.pllbuf) {
                 fe->ops->tuner_ops.pllbuf(fe, param, buf+8, 5);
                 buf[8] <<= 1;
                 mt352_write(fe, buf, sizeof(buf));
         }
-        if (state->config.no_tuner) {
-                /* start decoding */
-                mt352_write(fe, fsm_go, 2);
-        } else {
-                /* start tuning */
+
+        // send PLL and start tuning and then decoding
+        if (!state->config.no_tuner) {
                 mt352_write(fe, tuner_go, 2);
         }
+
         return 0;
 }