| From 8c5bcded11cb607b1bb5920de3b9c882136d27db Mon Sep 17 00:00:00 2001 |
| From: Ulrich Eckhardt <uli-lirc@uli-eckhardt.de> |
| Date: Fri, 10 Oct 2014 14:19:12 -0300 |
| Subject: media: ds3000: fix LNB supply voltage on Tevii S480 on initialization |
| |
| From: Ulrich Eckhardt <uli-lirc@uli-eckhardt.de> |
| |
| 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. |
| |
| [mchehab@osg.samsung.com: add a comment about why we're explicitly |
| turning off voltage at device init] |
| Signed-off-by: Ulrich Eckhardt <uli@uli-eckhardt.de> |
| Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com> |
| Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> |
| |
| --- |
| drivers/media/dvb-frontends/ds3000.c | 7 +++++++ |
| 1 file changed, 7 insertions(+) |
| |
| --- a/drivers/media/dvb-frontends/ds3000.c |
| +++ b/drivers/media/dvb-frontends/ds3000.c |
| @@ -864,6 +864,13 @@ struct dvb_frontend *ds3000_attach(const |
| 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: |
