hi David: 2014-02-23 23:16 GMT+08:00 David Herrmann <dh.herrmann@xxxxxxxxx>: > Hi > > On Sun, Feb 23, 2014 at 7:52 AM, loody <miloody@xxxxxxxxx> wrote: >> hi David: >> >> Thanks for your suggestion. >> 2014-02-23 0:56 GMT+08:00 David Herrmann <dh.herrmann@xxxxxxxxx>: >>> Hi >>> >>> On Sat, Feb 22, 2014 at 5:35 PM, loody <miloody@xxxxxxxxx> wrote: >>>> hi all: >>>> is there any kernel hid module parameter or test program can >>>> temporarily not letting user mode program not receiving hid event? >>>> 1. My hid kos are still inserted in. >>>> 2. the kernel usb driver is working well; that mean kernel usb driver >>>> still handle interrupt transaction. >>>> >>>> I just not want user mode program see the hid event for a while, >>> >>> For each connected HID device, there is a driver bound to it that >>> reads the events and forwards them to HID core. What you can do, is to >>> unbind a driver on a given device: >>> echo "<your-device-name>" >/sys/bus/hid/drivers/<driver-name>/unbind >>> The device-name is the directory name in: >>> /sys/bus/hid/devices/ >>> The driver name is usually "hid-generic" but can be figured out for >>> each device by looking at the "driver" symlink in it's directry. >>> However, this is *really* just meant for debugging. This is not >>> recommended for anything serious. There is no support for that and if >>> you don't know what all this does, you shouldn't use it. >>> >>> There is no proper way to disable a single device in the kernel. >>> User-space is supposed to control device-access so we probably won't >>> add such features to the kernel. If you describe your use-case in more >>> details, we can try to give hints how to get that working. >> >> Sorry for not describing our situation clearer previously, >> >> The problem we met like below >> a. once plug in usb hid mouse and fast moving mouse >> b. the screen will get blur. >> >> We want to know whether the screen blur is caused by >> 1. the interrupt frequency of usb mouse is too high for our embedded >> system that make video decode slow >> 2. something wrong between hw cursor and video overlay. >> >> if we can deceive user mode program there is no mouse event, but >> kernel usb level still get hid interrupt transaction. >> We may clarify whether above 1) conclusion is correct. >> >> Appreciate your kind help :-) > > You can unload the HID driver as described above, but that's unlikely > to fix any interrupt issues. How about you compile your kernel without > usbhid support? (CONFIG_USB_HID) BTW, is there any fake virtual mouse to use? That mean user doesn't plug in any usb hid mouse, but user mode program can receive hid mouse event? -- Regards, -- 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
