Commit b628a2a3 authored by Devin Heitmueller's avatar Devin Heitmueller Committed by Mauro Carvalho Chehab

V4L/DVB: au8522: fix case where we don't perform the first tune after going digital

Address a problem found in MythTV where if we are in digital mode, switch to
analog mode, and the switch back to digital mode, the first tuning request
after switching back to digital mode gets dropped.  This is because the au8522
maintains internal state, and would think the demod was already tuned to the
target frequency.

Thanks to Zaphod Beeblebrox for reporting this issue.
Signed-off-by: default avatarDevin Heitmueller <dheitmueller@kernellabs.com>
Signed-off-by: default avatarMauro Carvalho Chehab <mchehab@redhat.com>
parent 7f2c983c
...@@ -666,6 +666,11 @@ static int au8522_reset(struct v4l2_subdev *sd, u32 val) ...@@ -666,6 +666,11 @@ static int au8522_reset(struct v4l2_subdev *sd, u32 val)
state->operational_mode = AU8522_ANALOG_MODE; state->operational_mode = AU8522_ANALOG_MODE;
/* Clear out any state associated with the digital side of the
chip, so that when it gets powered back up it won't think
that it is already tuned */
state->current_frequency = 0;
au8522_writereg(state, 0xa4, 1 << 5); au8522_writereg(state, 0xa4, 1 << 5);
return 0; return 0;
......
...@@ -618,6 +618,11 @@ int au8522_init(struct dvb_frontend *fe) ...@@ -618,6 +618,11 @@ int au8522_init(struct dvb_frontend *fe)
state->operational_mode = AU8522_DIGITAL_MODE; state->operational_mode = AU8522_DIGITAL_MODE;
/* Clear out any state associated with the digital side of the
chip, so that when it gets powered back up it won't think
that it is already tuned */
state->current_frequency = 0;
au8522_writereg(state, 0xa4, 1 << 5); au8522_writereg(state, 0xa4, 1 << 5);
au8522_i2c_gate_ctrl(fe, 1); au8522_i2c_gate_ctrl(fe, 1);
......
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