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>

1 files changed, 11 insertions, 9 deletions

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);