xiaomi-sm8450/android_kernel_xiaomi_sm8450
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

media: dvb_frontend: add physical layer scrambling support

Browse Source 
This commit adds a new property DTV_SCRAMBLING_SEQUENCE_INDEX.

This 18 bit field, when present, carries the index of the DVB-S2 physical
layer scrambling sequence as defined in clause 5.5.4 of EN 302 307.
There is no explicit signalling method to convey scrambling sequence index
to the receiver. If S2 satellite delivery system descriptor is available
it can be used to read the scrambling sequence index (EN 300 468 table 41).

By default, gold scrambling sequence index 0 is used. The valid scrambling
sequence index range is from 0 to 262142.

Increase the DVB API version in order userspace to be aware of the changes.

Signed-off-by: Athanasios Oikonomou <athoik@gmail.com>
Acked-by: Ralph Metzler <rjkm@metzlerbros.de>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
This commit is contained in:
Athanasios Oikonomou
2017-12-16 07:23:38 -05:00
committed by Mauro Carvalho Chehab
parent 2453887924
commit f9d7912619
6 changed files with 42 additions and 2 deletions
Download Patch File Download Diff File Expand all files Collapse all files

5
include/uapi/linux/dvb/frontend.h
View File

@@ -547,7 +547,10 @@ enum fe_interleaving {
#define DTV_STAT_ERROR_BLOCK_COUNT 68
#define DTV_STAT_TOTAL_BLOCK_COUNT 69
#define DTV_MAX_COMMAND DTV_STAT_TOTAL_BLOCK_COUNT
/* Physical layer scrambling */
#define DTV_SCRAMBLING_SEQUENCE_INDEX 70
#define DTV_MAX_COMMAND DTV_SCRAMBLING_SEQUENCE_INDEX
/**
* enum fe_pilot - Type of pilot tone