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.h | |
| 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.h')
| -rw-r--r-- | drivers/media/common/tuners/mxl5005s.h | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/drivers/media/common/tuners/mxl5005s.h b/drivers/media/common/tuners/mxl5005s.h index 7ac6815b30aa..fc8a1ffc53b4 100644 --- a/drivers/media/common/tuners/mxl5005s.h +++ b/drivers/media/common/tuners/mxl5005s.h @@ -108,6 +108,10 @@ struct mxl5005s_config { #define MXL_LOW_IF 1 u8 if_mode; + /* Some boards need to override the built-in logic for determining + the gain when in QAM mode (the HVR-1600 is one such case) */ + u8 qam_gain; + /* Stuff I don't know what to do with */ u8 AgcMasterByte; }; |