Re: [RFC ebeam PATCH v3 0/2]
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-usb" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
Re: [RFC ebeam PATCH v3 0/2]
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.. > > - 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? -- Dmitry -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
Re: [RFC ebeam PATCH v3 0/2]
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 > - 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. greg k-h -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
[RFC ebeam PATCH v3 0/2]
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 - 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. - is div64_s64 safe and available on all plateform ? this is the only use of this function i've found in all the kernel tree. The module run fine with a 3.3.6 and a 3.5.0 kernel, both x86_32 and 64. Thanks for your help. -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
