From: Brad Love brad@nextdimension.cc
[ Upstream commit e955f959ac52e145f27ff2be9078b646d0352af0 ]
Getting the Xtal trim property to check if running is less error prone. Reset if_frequency if state is unknown.
Replaces the previous "garbage check".
Signed-off-by: Brad Love brad@nextdimension.cc Signed-off-by: Sean Young sean@mess.org Signed-off-by: Mauro Carvalho Chehab mchehab+huawei@kernel.org Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/media/tuners/si2157.c | 15 +++++++-------- 1 file changed, 7 insertions(+), 8 deletions(-)
diff --git a/drivers/media/tuners/si2157.c b/drivers/media/tuners/si2157.c index 57b250847cd3..72a47da0db2a 100644 --- a/drivers/media/tuners/si2157.c +++ b/drivers/media/tuners/si2157.c @@ -84,24 +84,23 @@ static int si2157_init(struct dvb_frontend *fe) struct si2157_cmd cmd; const struct firmware *fw; const char *fw_name; - unsigned int uitmp, chip_id; + unsigned int chip_id, xtal_trim;
dev_dbg(&client->dev, "\n");
- /* Returned IF frequency is garbage when firmware is not running */ - memcpy(cmd.args, "\x15\x00\x06\x07", 4); + /* Try to get Xtal trim property, to verify tuner still running */ + memcpy(cmd.args, "\x15\x00\x04\x02", 4); cmd.wlen = 4; cmd.rlen = 4; ret = si2157_cmd_execute(client, &cmd); - if (ret) - goto err;
- uitmp = cmd.args[2] << 0 | cmd.args[3] << 8; - dev_dbg(&client->dev, "if_frequency kHz=%u\n", uitmp); + xtal_trim = cmd.args[2] | (cmd.args[3] << 8);
- if (uitmp == dev->if_frequency / 1000) + if (ret == 0 && xtal_trim < 16) goto warm;
+ dev->if_frequency = 0; /* we no longer know current tuner state */ + /* power up */ if (dev->chiptype == SI2157_CHIPTYPE_SI2146) { memcpy(cmd.args, "\xc0\x05\x01\x00\x00\x0b\x00\x00\x01", 9);