V4L/DVB (9225): MFE: Add configurable gate control

This adds a configurable (one per card) gate control option
for multi-frontend. Prior to this point gate control was
assumed to be on the primary frontend, this is a fault
when the gate to the analogue section is on the secondary
which is the default for both the HVR-3000 and HVR-4000
in MFE.

Signed-off-by: Darron Broad <darron@kewl.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

3 files changed, 18 insertions, 10 deletions

diff --git a/drivers/media/video/cx88/cx88-dvb.c b/drivers/media/video/cx88/cx88-dvb.c
index 58128687e5cc..9bb7bee0da6d 100644
--- a/drivers/media/video/cx88/cx88-dvb.c
+++ b/drivers/media/video/cx88/cx88-dvb.c
@@ -608,7 +608,10 @@ static int dvb_register(struct cx8802_dev *dev)
         if (!fe0)
                 return -EINVAL;
 
-        /* init frontend */
+        /* multi-frontend gate control is undefined or defaults to fe0 */
+        dev->frontends.gate = 0;
+
+        /* init frontend(s) */
         switch (core->boardnr) {
         case CX88_BOARD_HAUPPAUGE_DVB_T1:
                 fe0->dvb.frontend = dvb_attach(cx22702_attach,
@@ -665,6 +668,7 @@ static int dvb_register(struct cx8802_dev *dev)
                 /* DVB-T init */
                 fe1 = videobuf_dvb_get_frontend(&dev->frontends, 2);
                 if (fe1) {
+                        dev->frontends.gate = 2;
                         fe1->dvb.frontend = dvb_attach(cx22702_attach,
                                 &hauppauge_hvr_config,
                                 &dev->core->i2c_adap);
@@ -1008,6 +1012,7 @@ static int dvb_register(struct cx8802_dev *dev)
                 /* DVB-T Init */
                 fe1 = videobuf_dvb_get_frontend(&dev->frontends, 2);
                 if (fe1) {
+                        dev->frontends.gate = 2;
                         fe1->dvb.frontend = dvb_attach(cx22702_attach,
                                 &hauppauge_hvr_config,
                                 &dev->core->i2c_adap);
diff --git a/drivers/media/video/cx88/cx88-i2c.c b/drivers/media/video/cx88/cx88-i2c.c
index 582769de26b5..01de23007095 100644
--- a/drivers/media/video/cx88/cx88-i2c.c
+++ b/drivers/media/video/cx88/cx88-i2c.c
@@ -116,23 +116,25 @@ static int detach_inform(struct i2c_client *client)
 
 void cx88_call_i2c_clients(struct cx88_core *core, unsigned int cmd, void *arg)
 {
-        struct videobuf_dvb_frontend *fe0 = NULL;
+        struct videobuf_dvb_frontends *f = &core->dvbdev->frontends;
+        struct videobuf_dvb_frontend *fe = NULL;
         if (0 != core->i2c_rc)
                 return;
 
 #if defined(CONFIG_VIDEO_CX88_DVB) || defined(CONFIG_VIDEO_CX88_DVB_MODULE)
-        if (core->dvbdev) {
-                /* Get the first frontend and assume that all I2C is routed through it */
-                /* TODO: Get _THIS_FE_ then find the right i2c_gate_ctrl for it */
-                fe0 = videobuf_dvb_get_frontend(&core->dvbdev->frontends, 1);
+        if (core->dvbdev && f) {
+                if(f->gate <= 1) /* undefined or fe0 */
+                        fe = videobuf_dvb_get_frontend(f, 1);
+                else
+                        fe = videobuf_dvb_get_frontend(f, f->gate);
 
-                if (fe0 && fe0->dvb.frontend && fe0->dvb.frontend->ops.i2c_gate_ctrl)
-                        fe0->dvb.frontend->ops.i2c_gate_ctrl(fe0->dvb.frontend, 1);
+                if (fe && fe->dvb.frontend && fe->dvb.frontend->ops.i2c_gate_ctrl)
+                        fe->dvb.frontend->ops.i2c_gate_ctrl(fe->dvb.frontend, 1);
 
                 i2c_clients_command(&core->i2c_adap, cmd, arg);
 
-                if (fe0 && fe0->dvb.frontend && fe0->dvb.frontend->ops.i2c_gate_ctrl)
-                        fe0->dvb.frontend->ops.i2c_gate_ctrl(fe0->dvb.frontend, 0);
+                if (fe && fe->dvb.frontend && fe->dvb.frontend->ops.i2c_gate_ctrl)
+                        fe->dvb.frontend->ops.i2c_gate_ctrl(fe->dvb.frontend, 0);
         } else
 #endif
                 i2c_clients_command(&core->i2c_adap, cmd, arg);
diff --git a/include/media/videobuf-dvb.h b/include/media/videobuf-dvb.h
index 09547ec3f3c3..47bc2c5e7ba9 100644
--- a/include/media/videobuf-dvb.h
+++ b/include/media/videobuf-dvb.h
@@ -36,6 +36,7 @@ struct videobuf_dvb_frontends {
         struct dvb_adapter adapter;
         int active_fe_id; /* Indicates which frontend in the felist is in use */
         struct videobuf_dvb_frontend frontend;
+        int gate; /* Frontend with gate control 0=!MFE,1=fe0,2=fe1 etc */
 };
 
 int videobuf_dvb_register_bus(struct videobuf_dvb_frontends *f,