From: Ulrich Eckhardt <uli-l...@uli-eckhardt.de>
3.12-stable review patch. If anyone has any objections, please let me know.
===============
commit 8c5bcded11cb607b1bb5920de3b9c882136d27db upstream.
The Tevii S480 outputs 18V on startup for the LNB supply voltage and does not
automatically power down. This blocks other receivers connected
to a satellite channel router (EN50494), since the receivers can not send the
required DiSEqC sequences when the Tevii card is connected to a the same SCR.
This patch switches off the LNB supply voltage on initialization of the
frontend.
[mche...@osg.samsung.com: add a comment about why we're explicitly
turning off voltage at device init]
Signed-off-by: Ulrich Eckhardt <u...@uli-eckhardt.de>
Signed-off-by: Mauro Carvalho Chehab <mche...@osg.samsung.com>
Signed-off-by: Jiri Slaby <jsl...@suse.cz>
---
drivers/media/dvb-frontends/ds3000.c | 7 +++++++
1 file changed, 7 insertions(+)
diff --git a/drivers/media/dvb-frontends/ds3000.c
b/drivers/media/dvb-frontends/ds3000.c
index 1e344b033277..22e8c2032f6d 100644
--- a/drivers/media/dvb-frontends/ds3000.c
+++ b/drivers/media/dvb-frontends/ds3000.c
@@ -864,6 +864,13 @@ struct dvb_frontend *ds3000_attach(const struct
ds3000_config *config,
memcpy(&state->frontend.ops, &ds3000_ops,
sizeof(struct dvb_frontend_ops));
state->frontend.demodulator_priv = state;
+
+ /*
+ * Some devices like T480 starts with voltage on. Be sure
+ * to turn voltage off during init, as this can otherwise
+ * interfere with Unicable SCR systems.
+ */
+ ds3000_set_voltage(&state->frontend, SEC_VOLTAGE_OFF);
return &state->frontend;
error3:
--
2.1.3
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