Le 07/08/2012 00:09, Dmitry Torokhov a écrit : > On Monday, August 06, 2012 02:44:23 PM Greg KH wrote: >> On Mon, Aug 06, 2012 at 11:21:42PM +0200, Yann Cantin wrote: >>> Hi, >>> >>> New USB input driver for eBeam devices. >>> >>> Currently, only the Luidia eBeam classic projection model is supported. >>> Edge model and a NEC interactive video-projector support planned for the >>> end of the mounth. >>> >>> Patch 1 to blacklist the device for hid generic-usb. >>> >>> Patch 2 is the actual driver. >>> >>> Changes from previous : >>> - switch to div64_s64 for portable 64/64-bits divisions > > Do you really need this much precision? It will be slower on 32 bits.. Yes. I can give the details if you want (homography computation without floating point maths). >>> - some cosmetics in device name >>> - unused include and def removed >>> - variables name changes for readability >>> >>> Pending issues : >>> >>> - sysfs custom files : need to pass 13 parameters for calibration : >>> choice is between lots of simply-handled, or few with a big sscanf. >> >> sysfs is "one value per file", so use lots of different files please. > > This is kind of a "one value" though - it is a transformation matrix. > Maybe switch it to binary - 9 s32? Right, but this somehow obfuscate the api. In the other hand, i doubt there will be lots of calibration tools other that mine. Is there any drawback for numerous sysfs custom files ? -- Yann Cantin A4FEB47F -- -- To unsubscribe from this list: send the line "unsubscribe linux-input" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
