Kernel 2.6.17 and lirc_gpio driver
I use an old bt878-based TV capture card, whose remote control needs the lirc_gpio driver in order to work. I remember that this specific LIRC driver could not be compiled after upgrading to kernel 2.6.17. I investigated this problem a couple of days ago and it seems that the cause of this issue is the fact that the location of the bt848/bt878 related kernel headers has changed.
The needed headers, bttv.h and bttvp.h, now exist in the drivers/media/video/bt8xx/ directory. Their old location was drivers/media/video/. So, compiling lirc_gpio requires the following small patch:
--- drivers/lirc_gpio/lirc_gpio.c.original 2006-01-01 15:43:46.000000000 +0200 +++ drivers/lirc_gpio/lirc_gpio.c 2006-09-08 20:03:34.000000000 +0300 @@ -49,8 +49,8 @@ #include "../drivers/char/bttv.h" #include "../drivers/char/bttvp.h" #else -#include "../drivers/media/video/bttv.h" -#include "../drivers/media/video/bttvp.h" +#include "../drivers/media/video/bt8xx/bttv.h" +#include "../drivers/media/video/bt8xx/bttvp.h" #endif #if BTTV_VERSION_CODE < KERNEL_VERSION(0,7,45)
While lirc_gpio should now be compiled without problems, there is one more issue, which seems to be a kernel-source bug. The bttvp.h “includes” another header (btcx-risc.h), which should exist in the same directory. But, this file actually exists in the parent directory (drivers/media/video/). So, until this kernel source issue is resolved, the only way to build lirc_gpio succesfully is to:
- patch LIRC sources with the above patch,
- copy the
btcx-risc.hkernel header from location:drivers/media/video/to location:drivers/media/video/bt8xx/within the kernel source tree.
I have already filed a bug about this in the Fedora Bugzilla. If there is anything I have missed, drop me a line.
Further Reading
- The Complete Fedora Kernel Headers – all the required actions in order to compile lirc_gpio in Fedora.
- How to configure and use LIRC
