DVB FE callback functionality went broken after I moved tuners to
demod muxed I2C adapter. That happens because driver state was
carried by I2C adapter and when mux is used there is one adapter
more in a chain.
USB adapter <-> I2C adapter <-> muxed I2C adapter
Signed-off-by: Antti Palosaari <cr...@iki.fi>
---
drivers/media/usb/dvb-usb-v2/rtl28xxu.c | 19 +++++++++++++++++--
1 file changed, 17 insertions(+), 2 deletions(-)
diff --git a/drivers/media/usb/dvb-usb-v2/rtl28xxu.c
b/drivers/media/usb/dvb-usb-v2/rtl28xxu.c
index 0d37d0c..1f29307 100644
--- a/drivers/media/usb/dvb-usb-v2/rtl28xxu.c
+++ b/drivers/media/usb/dvb-usb-v2/rtl28xxu.c
@@ -740,8 +740,23 @@ static int rtl2832u_tuner_callback(struct dvb_usb_device
*d, int cmd, int arg)
static int rtl2832u_frontend_callback(void *adapter_priv, int component,
int cmd, int arg)
{
- struct i2c_adapter *adap = adapter_priv;
- struct dvb_usb_device *d = i2c_get_adapdata(adap);
+ struct i2c_adapter *adapter = adapter_priv;
+ struct device *parent = adapter->dev.parent;
+ struct i2c_adapter *parent_adapter;
+ struct dvb_usb_device *d;
+
+ /*
+ * All tuners are connected to demod muxed I2C adapter. We have to
+ * resolve its parent adapter in order to get handle for this driver
+ * private data. That is a bit hackish solution, GPIO or direct driver
+ * callback would be better...
+ */
+ if (parent != NULL && parent->type == &i2c_adapter_type)
+ parent_adapter = to_i2c_adapter(parent);
+ else
+ return -EINVAL;
+
+ d = i2c_get_adapdata(parent_adapter);
dev_dbg(&d->udev->dev, "%s: component=%d cmd=%d arg=%d\n",
__func__, component, cmd, arg);
--
http://palosaari.fi/
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