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media: si2168: change ts bus control logic 

Move the ts bus control function moved higher, enabling it
after configuring frontend and removeing ts_bus_ctrl callback.

While here, also add an error checking and re-add a comment
that were removed by commit 445877742c ("media: si2168:
Add ts bus coontrol, turn off bus on sleep").

[mchehab@s-opensource.com: I ended by applying the first version,
 instead of the right one. So, this patch contains the diff and
 the v2 changelog instead]

Fixes: 445877742c ("media: si2168: Add ts bus coontrol, turn off bus on sleep")

Signed-off-by: Brad Love <brad@nextdimension.cc>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
This commit is contained in:
Brad Love 2018-02-12 15:19:04 -05:00 committed by Mauro Carvalho Chehab
parent da2cf18ff8
commit 1844f49861
1 changed files with 33 additions and 27 deletions
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60
drivers/media/dvb-frontends/si2168.c
View File

@ -82,6 +82,30 @@ static int si2168_cmd_execute(struct i2c_client *client, struct si2168_cmd *cmd)
return ret;
}
static int si2168_ts_bus_ctrl(struct dvb_frontend *fe, int acquire)
{
struct i2c_client *client = fe->demodulator_priv;
struct si2168_dev *dev = i2c_get_clientdata(client);
struct si2168_cmd cmd;
int ret = 0;
dev_dbg(&client->dev, "%s acquire: %d\n", __func__, acquire);
/* set TS_MODE property */
memcpy(cmd.args, "\x14\x00\x01\x10\x10\x00", 6);
if (acquire)
cmd.args[4] |= dev->ts_mode;
else
cmd.args[4] |= SI2168_TS_TRISTATE;
if (dev->ts_clock_gapped)
cmd.args[4] |= 0x40;
cmd.wlen = 6;
cmd.rlen = 4;
ret = si2168_cmd_execute(client, &cmd);
return ret;
}
static int si2168_read_status(struct dvb_frontend *fe, enum fe_status *status)
{
struct i2c_client *client = fe->demodulator_priv;
@ -405,36 +429,17 @@ static int si2168_set_frontend(struct dvb_frontend *fe)
dev->delivery_system = c->delivery_system;
/* enable ts bus */
ret = si2168_ts_bus_ctrl(fe, 1);
if (ret)
goto err;
return 0;
err:
dev_dbg(&client->dev, "failed=%d\n", ret);
return ret;
}
static int si2168_ts_bus_ctrl(struct dvb_frontend *fe, int acquire)
{
struct i2c_client *client = fe->demodulator_priv;
struct si2168_dev *dev = i2c_get_clientdata(client);
struct si2168_cmd cmd;
int ret = 0;
dev_dbg(&client->dev, "%s acquire: %d\n", __func__, acquire);
/* set TS_MODE property */
memcpy(cmd.args, "\x14\x00\x01\x10\x10\x00", 6);
if (acquire)
cmd.args[4] |= dev->ts_mode;
else
cmd.args[4] |= SI2168_TS_TRISTATE;
if (dev->ts_clock_gapped)
cmd.args[4] |= 0x40;
cmd.wlen = 6;
cmd.rlen = 4;
ret = si2168_cmd_execute(client, &cmd);
return ret;
}
static int si2168_init(struct dvb_frontend *fe)
{
struct i2c_client *client = fe->demodulator_priv;
@ -566,6 +571,7 @@ static int si2168_init(struct dvb_frontend *fe)
dev->version >> 24 & 0xff, dev->version >> 16 & 0xff,
dev->version >> 8 & 0xff, dev->version >> 0 & 0xff);
/* set ts mode */
ret = si2168_ts_bus_ctrl(fe, 1);
if (ret)
goto err;
@ -604,7 +610,9 @@ static int si2168_sleep(struct dvb_frontend *fe)
dev->active = false;
/* tri-state data bus */
si2168_ts_bus_ctrl(fe, 0);
ret = si2168_ts_bus_ctrl(fe, 0);
if (ret)
goto err;
/* Firmware B 4.0-11 or later loses warm state during sleep */
if (dev->version > ('B' << 24 | 4 << 16 | 0 << 8 | 11 << 0))
@ -703,8 +711,6 @@ static const struct dvb_frontend_ops si2168_ops = {
.init = si2168_init,
.sleep = si2168_sleep,
.ts_bus_ctrl = si2168_ts_bus_ctrl,
.set_frontend = si2168_set_frontend,
.read_status = si2168_read_status,