[media] mb86a20s: add support for serial streams

By comparing the traffic between Pixelview (cx23102-based and Kworld
(saa7134-based), the only difference is at register 0xd5. After some
tests, It seems that it is used to change mode between serial and parallel.

Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

3 files changed, 15 insertions, 5 deletions

diff --git a/drivers/media/dvb/frontends/mb86a20s.c b/drivers/media/dvb/frontends/mb86a20s.c
index 1e6bec6aa0f9..b4de8f12df27 100644
--- a/drivers/media/dvb/frontends/mb86a20s.c
+++ b/drivers/media/dvb/frontends/mb86a20s.c
@@ -43,10 +43,6 @@ struct mb86a20s_state {
         const struct mb86a20s_config *config;
 
         struct dvb_frontend frontend;
-
-
-
-
 };
 
 struct regdata {
@@ -175,7 +171,7 @@ static struct regdata mb86a20s_init[] = {
         { 0x45, 0x04 },
         { 0x48, 0x04 },
         { 0x50, 0xd5 },
-        { 0x51, 0x01 },
+        { 0x51, 0x01 },         /* Serial */
         { 0x50, 0xd6 },
         { 0x51, 0x1f },
         { 0x50, 0xd2 },
@@ -376,6 +372,7 @@ static int mb86a20s_initfe(struct dvb_frontend *fe)
 {
         struct mb86a20s_state *state = fe->demodulator_priv;
         int rc;
+        u8  regD5 = 1;
 
         dprintk("\n");
 
@@ -384,6 +381,17 @@ static int mb86a20s_initfe(struct dvb_frontend *fe)
         if (rc < 0)
                 return rc;
 
+        if (!state->config->is_serial) {
+                regD5 &= ~1;
+
+                rc = mb86a20s_writereg(state, 0x50, 0xd5);
+                if (rc < 0)
+                        return rc;
+                rc = mb86a20s_writereg(state, 0x51, regD5);
+                if (rc < 0)
+                        return rc;
+        }
+
         return 0;
 }
 
diff --git a/drivers/media/dvb/frontends/mb86a20s.h b/drivers/media/dvb/frontends/mb86a20s.h
index e3461983a831..bf22e77888b9 100644
--- a/drivers/media/dvb/frontends/mb86a20s.h
+++ b/drivers/media/dvb/frontends/mb86a20s.h
@@ -26,6 +26,7 @@
 
 struct mb86a20s_config {
         u8 demod_address;
+        bool is_serial;
 };
 
 #if defined(CONFIG_DVB_MB86A20S) || (defined(CONFIG_DVB_MB86A20S_MODULE) \
diff --git a/drivers/media/video/cx231xx/cx231xx-dvb.c b/drivers/media/video/cx231xx/cx231xx-dvb.c
index b55e7e0bc245..fe59a1c3f064 100644
--- a/drivers/media/video/cx231xx/cx231xx-dvb.c
+++ b/drivers/media/video/cx231xx/cx231xx-dvb.c
@@ -143,6 +143,7 @@ static struct tda18271_config hcw_tda18271_config = {
 
 static const struct mb86a20s_config pv_mb86a20s_config = {
         .demod_address = 0x10,
+        .is_serial = true,
 };
 
 static struct tda18271_config pv_tda18271_config = {