[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>

1 files changed, 2 insertions, 2 deletions

diff --git a/include/uapi/linux/dvb/frontend.h b/include/uapi/linux/dvb/frontend.h
index c56d77c496a5..466f56997272 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));