[media] saa7134: Fix digital mode on Kworld SBTVD

This patch fixes digital mode on Kworld SBTVD. Unfortunately, it disables
analog mode.

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

1 files changed, 37 insertions, 1 deletions

diff --git a/drivers/media/video/saa7134/saa7134-dvb.c b/drivers/media/video/saa7134/saa7134-dvb.c
index 064bf2cd5f2..d2a12df28af 100644
--- a/drivers/media/video/saa7134/saa7134-dvb.c
+++ b/drivers/media/video/saa7134/saa7134-dvb.c
@@ -236,13 +236,38 @@ static struct tda18271_std_map mb86a20s_tda18271_std_map = {
 
 static struct tda18271_config kworld_tda18271_config = {
         .std_map = &mb86a20s_tda18271_std_map,
-        .gate    = TDA18271_GATE_ANALOG,
+        .gate    = TDA18271_GATE_DIGITAL,
 };
 
 static const struct mb86a20s_config kworld_mb86a20s_config = {
         .demod_address = 0x10,
 };
 
+static int kworld_sbtvd_gate_ctrl(struct dvb_frontend* fe, int enable)
+{
+        struct saa7134_dev *dev = fe->dvb->priv;
+
+        unsigned char initmsg[] = {0x45, 0x97};
+        unsigned char msg_enable[] = {0x45, 0xc1};
+        unsigned char msg_disable[] = {0x45, 0x81};
+        struct i2c_msg msg = {.addr = 0x4b, .flags = 0, .buf = initmsg, .len = 2};
+
+        if (i2c_transfer(&dev->i2c_adap, &msg, 1) != 1) {
+                wprintk("could not access the I2C gate\n");
+                return -EIO;
+        }
+        if (enable)
+                msg.buf = msg_enable;
+        else
+                msg.buf = msg_disable;
+        if (i2c_transfer(&dev->i2c_adap, &msg, 1) != 1) {
+                wprintk("could not access the I2C gate\n");
+                return -EIO;
+        }
+        msleep(20);
+        return 0;
+}
+
 /* ==================================================================
  * tda1004x based DVB-T cards, helper functions
  */
@@ -1639,10 +1664,21 @@ static int dvb_init(struct saa7134_dev *dev)
                                                &kworld_mb86a20s_config,
                                                &dev->i2c_adap);
                 if (fe0->dvb.frontend != NULL) {
+#if 0
+                        dvb_attach(tda829x_attach, fe0->dvb.frontend,
+                                   &dev->i2c_adap, 0x4b,
+                                   &tda829x_no_probe);
+#else
+                        dvb_attach(tda829x_attach, fe0->dvb.frontend,
+                                   &dev->i2c_adap, 0x4b, NULL);
+#endif
                         dvb_attach(tda18271_attach, fe0->dvb.frontend,
                                    0x60, &dev->i2c_adap,
                                    &kworld_tda18271_config);
+                        fe0->dvb.frontend->ops.i2c_gate_ctrl = kworld_sbtvd_gate_ctrl;
                 }
+
+                /* mb86a20s need to use the I2C gateway */
                 break;
         default:
                 wprintk("Huh? unknown DVB card?\n");