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| author | Manu Abraham <abraham.manu@gmail.com> | 2011-11-13 18:47:44 -0300 |
|---|---|---|
| committer | Mauro Carvalho Chehab <mchehab@redhat.com> | 2011-12-12 15:03:32 -0200 |
| commit | ba2780c796badfc3741c7cb499a575ca49f17e6d (patch) | |
| tree | 63e5968d4366d97b56441e7a6ae0348b152a7f44 /include/linux/dvb/frontend.h | |
| parent | e79c70e6e59e764fbef2a68a7d7303c3286ea7a8 (diff) | |
| download | linux-stable-ba2780c796badfc3741c7cb499a575ca49f17e6d.tar.gz linux-stable-ba2780c796badfc3741c7cb499a575ca49f17e6d.tar.bz2 linux-stable-ba2780c796badfc3741c7cb499a575ca49f17e6d.zip | |
[media] DVB: Query DVB frontend delivery capabilities
Currently, for any multi-standard frontend it is assumed that it just
has a single standard capability. This is fine in some cases, but
makes things hard when there are incompatible standards in conjuction.
Eg: DVB-S can be seen as a subset of DVB-S2, but the same doesn't hold
the same for DSS. This is not specific to any driver as it is, but a
generic issue. This was handled correctly in the multiproto tree,
while such functionality is missing from the v5 API update.
http://www.linuxtv.org/pipermail/vdr/2008-November/018417.html
Later on a FE_CAN_2G_MODULATION was added as a hack to workaround this
issue in the v5 API, but that hack is incapable of addressing the
issue, as it can be used to simply distinguish between DVB-S and
DVB-S2 alone, or another X vs X2 modulation. If there are more systems,
then you have a potential issue.
An application needs to query the device capabilities before requesting
any operation from the device.
Signed-off-by: Manu Abraham <abraham.manu@gmail.com>
Acked-by: Andreas Oberritter <obi@linuxtv.org>
Acked-by: Oliver Endriss <o.endriss@gmx.de>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
Diffstat (limited to 'include/linux/dvb/frontend.h')
| -rw-r--r-- | include/linux/dvb/frontend.h | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/include/linux/dvb/frontend.h b/include/linux/dvb/frontend.h index d9251df867b5..cb114f52ccf7 100644 --- a/include/linux/dvb/frontend.h +++ b/include/linux/dvb/frontend.h @@ -316,7 +316,9 @@ struct dvb_frontend_event { #define DTV_DVBT2_PLP_ID 43 -#define DTV_MAX_COMMAND DTV_DVBT2_PLP_ID +#define DTV_ENUM_DELSYS 44 + +#define DTV_MAX_COMMAND DTV_ENUM_DELSYS typedef enum fe_pilot { PILOT_ON, |