Em 12-11-2012 11:04, Martin Rudge escreveu:
Hello All, When using the V5 API (DVB-S/S2) for the DVB frontend device (with the now merged SEC functionality), setting properties DTV_VOLTAGE and/or DTV_TONE generates extra (unwanted?) events. This is due to utilising the legacy FE_SET_FRONTEND IOCTL in their respective implementations. Depending on their placement in one "atomic" FE_SET_PROPERTY call, they can cause an "incorrect" (premature) SYNC/LOCK event to be generated. For example, when looping issuing tune requests in succession during a scan operation. This was with a fairly recent media build (pulled Saturday).
I suspect that this is an undesirable behavior, likely there since the initial version of DVB-S2 API. It could be too late to fix, as userspace apps may be trusting on this behavior. Maybe you could propose a patch and ask app developers what they thing about it.
Conversly using DTV_CLEAR clears the cached values, but doesn't affect the frontend (LNB). This is probably desirable behaviour.
This is desirable.
Any thoughts, working as designed/intended?
Regards, Mauro -- To unsubscribe from this list: send the line "unsubscribe linux-media" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
