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authorMike Isely <isely@pobox.com>2007-09-08 22:28:51 -0300
committerMauro Carvalho Chehab <mchehab@infradead.org>2007-10-09 22:14:34 -0300
commit9f66d4eac6be2428901ab6e0cbb6747d5b6794ef (patch)
treeff790fe0c5c650dfdd4e202c87397f8497990561 /drivers/media/video/bt819.c
parent1d643a372259749ce2029e386ed5760d5d7f8b89 (diff)
V4L/DVB (6210): pvrusb2: Do a far better job at setting the default initial video standard
The v4l tveeprom logic tells us what video standards are supported by the hardware, however it doesn't directly tell us what should be the preferred initial standard. For example "NTSC/NTSC-J" devices are reported by tveeprom as support NTSC-M and PAL-M, and while that might be true, in the vast majority of cases NTSC-M is really what the user is going to want. However the driver previously just arbitrarily picked the "lowest numbered" standard as the initial default, which in that case would have been PAL-M. (And making matters more confusing - this only caused real problems on 24xxx devices because the saa7115 on 29xxx seems to autodetect the right answer anyway.) This change implements an algorithm that uses the set of "supported" standards as a hint to decide on the initial standard. This algorithm ONLY comes into play if the driver isn't specifically told what to do; said another way - the user can always still change the standard via the sysfs interface, via the usual V4L methods, or even specified as a module parameter. The idea here is only to pick a better starting point if the user (or app) doesn't otherwise do something to set the standard; otherwise this change has no real impact. Signed-off-by: Mike Isely <isely@pobox.com> Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
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