diff options
| author | Devin Heitmueller <dheitmueller@kernellabs.com> | 2009-10-29 05:10:16 +0300 |
|---|---|---|
| committer | Mauro Carvalho Chehab <mchehab@redhat.com> | 2009-12-05 23:41:23 +0300 |
| commit | 48c511ed675772bd08044d97756f7f7aae5168eb (patch) | |
| tree | 19f91133199dfad5ab0174ff5d826c0404760328 /drivers/media/common/tuners/mxl5005s.c | |
| parent | f0cd44b4a1a7465230dfbe1e645d9dc73f83cb13 (diff) | |
| download | linux-48c511ed675772bd08044d97756f7f7aae5168eb.tar.xz | |
V4L/DVB (13331): mxl5005s: provide ability to override QAM gain for HVR-1600
The HVR-1600 doesn't use the standard mechanism for computing the gain when
in QAM mode, instead always forcing it to be 0x02. Provide the ability to
override the algorithm on a per-board basis.
This change results in an improvement of 0.4-0.6 dB for QAM tuning.
This work was sponsored by ONELAN Limited.
Cc: Steven Toth <stoth@kernellabs.com>
Signed-off-by: Devin Heitmueller <dheitmueller@kernellabs.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
Diffstat (limited to 'drivers/media/common/tuners/mxl5005s.c')
| -rw-r--r-- | drivers/media/common/tuners/mxl5005s.c | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/drivers/media/common/tuners/mxl5005s.c b/drivers/media/common/tuners/mxl5005s.c index 0803dab58fff..605e28b73263 100644 --- a/drivers/media/common/tuners/mxl5005s.c +++ b/drivers/media/common/tuners/mxl5005s.c @@ -2789,7 +2789,10 @@ static u16 MXL_TuneRF(struct dvb_frontend *fe, u32 RF_Freq) /* add for 2.6.5 Special setting for QAM */ if (state->Mod_Type == MXL_QAM) { - if (state->RF_IN < 680000000) + if (state->config->qam_gain != 0) + status += MXL_ControlWrite(fe, RFSYN_CHP_GAIN, + state->config->qam_gain); + else if (state->RF_IN < 680000000) status += MXL_ControlWrite(fe, RFSYN_CHP_GAIN, 3); else status += MXL_ControlWrite(fe, RFSYN_CHP_GAIN, 2); |