diff options
| author | David Howells <dhowells@redhat.com> | 2015-04-09 19:36:49 (GMT) |
|---|---|---|
| committer | Mauro Carvalho Chehab <mchehab@osg.samsung.com> | 2015-05-14 21:29:48 (GMT) |
| commit | 4c12adad26f059fa207d6b07aa61f39bc459211b (patch) | |
| tree | f903c40f998af698447faa89ff3a39b6da50d7e0 /include | |
| parent | 24d795d361b2cd5cb6a6915ad4df61db7a2a9bef (diff) | |
| download | linux-4c12adad26f059fa207d6b07aa61f39bc459211b.tar.xz | |
[media] dvb: Document FE_SCALE_DECIBEL units consistently
In comments and in the documentation, the units of properties marked
with the FE_SCALE_DECIBEL scale are specified in terms of 1/1000 dB
or 0.0001 dB. This is inconsistent, however, as 1/1000 is 0.001,
not 0.0001.
Note that the v4l-utils divide the value by 1000 for the signal
strength suggesting that the 1/1000 is correct.
Settle on millidecibels, ie. 1/1000dB or 0.001dB.
Signed-off-by: David Howells <dhowells@redhat.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
Diffstat (limited to 'include')
| -rw-r--r-- | include/uapi/linux/dvb/frontend.h | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/include/uapi/linux/dvb/frontend.h b/include/uapi/linux/dvb/frontend.h index c56d77c..466f569 100644 --- a/include/uapi/linux/dvb/frontend.h +++ b/include/uapi/linux/dvb/frontend.h @@ -467,7 +467,7 @@ struct dtv_cmds_h { * @FE_SCALE_NOT_AVAILABLE: That QoS measure is not available. That * could indicate a temporary or a permanent * condition. - * @FE_SCALE_DECIBEL: The scale is measured in 0.0001 dB steps, typically + * @FE_SCALE_DECIBEL: The scale is measured in 0.001 dB steps, typically * used on signal measures. * @FE_SCALE_RELATIVE: The scale is a relative percentual measure, * ranging from 0 (0%) to 0xffff (100%). @@ -516,7 +516,7 @@ struct dtv_stats { __u8 scale; /* enum fecap_scale_params type */ union { __u64 uvalue; /* for counters and relative scales */ - __s64 svalue; /* for 0.0001 dB measures */ + __s64 svalue; /* for 0.001 dB measures */ }; } __attribute__ ((packed)); |