Hi 2011/4/5 Dmitry Torokhov <dmitry.torokhov@xxxxxxxxx>: > On Tue, Apr 05, 2011 at 08:12:07PM +0200, Eduard Hasenleithner wrote: >> I have been encouraged by Ping Cheng to submit the OLED matrix display >> patch for the Intuos4 to the linux-input mailing list. In absence of >> any comment by you on this issue, I'm a bit lost. Could you give >> something like a quick ACK (e.g. you will have a look into it later, >> when you have time) or NACK (e.g. no way for inclusion, needs major >> change, ...). > > Sorry, just a bit swamped at the moment (unfortunately happens to be > quite often ;( ), that is why not responding... If you like, I can come back in a month or so for discussion. Or you write me an email when you are less stressed (you being a maintainer, this is probably just wishful thinking). > The main issue for me is adding a new device-specific interface. Are > there any other suitable ways to provide access to the functionality? > Something like auxdisplay? I had the impression that using the existing RAW USB-device IOCTL mechanism would not be considered an additional interface. There is no change in the event- or any other subsystem, just in the wacom driver. And, as a bonus, using sysfs the RAW USB Device belonging to the event device can be located in a straight forward way. Since the wacom driver "grabs" the USB device and the OLED part of the Intuos4 is not a separate USB device, the display control has to be performed in any case in the wacom (input) driver. A "auxdisplay" implementation would then have to be done also there. Wrt auxdisplay: a quick look at the driver reveals that it exposes a (generic?) framebuffer device. If you say: "This is the way to go", I'll try it. It is just that I fear that some X-Server might automatically use it as display, which is not exactly my intention ;) Furthermore, there are four LEDs (only one can be lit at a time) on the device, and three different luminace settings, which would probably need some IOCTL anyway. And due to the higher complexity, implementing a (simulated) framebuffer device provides more possibilities for bugs. Thanks, Eduard -- 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
