-----Original Message----- From: Rafi Rubin [mailto:rafi@xxxxxxxxxxxxxx] Sent: Monday, March 08, 2010 3:34 AM To: Micki Balanga Cc: jkosina@xxxxxxx; chatty@xxxxxxx; peterhuewe@xxxxxx; linux-input@xxxxxxxxxxxxxxx; linux-kernel@xxxxxxxxxxxxxxx Subject: Re: [PATCH] USB: N-trig Finger Pen Multitouch fix -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 First let me thank you for contributing to the development of this driver. I suggest you use scripts/checkpatch.pl it will catch a number of style issues. Dmitry was kind enough to point it out when I sent in my recent set of patches. [Micki] I used the script to check the patch Mostly it looks like this patch is the delta from an almost completely independently developed driver. That makes it considerably more work to analyze the fundamental differences. I would have preferred to see a set of patches which first mutate the existing code to match your naming conventions (if that is so desired) and then patches that show how things are actually different (A lesson I've learned the hard way). I see quite a number of changes that handle the protocol better than my version, would you be offended if I begin to absorb those and submit joint patches? I'm not sure about the proper etiquette for that. [Micki] As mentioned in my mail we have tested the driver with application develop by N-trig. [Micki] Our user space application rely on these events, so if you want to make any change I will be happy if you [Micki] consult me. On 03/07/10 14:04, Micki Balanga wrote: > The purpose of this patch is to enable Linux users to experience the > complete N-trig DuoSense pen and true multi-touch solution capabilities > over a Linux platform. This driver has been carefully and thoroughly > tested by N-trig, over a period of several months. What user space tools have you tested this driver with? It does not seem to work well with the wacom and evdev drivers. [Micki] We will put on N-trig web site a DEB package What improvements beyond the driver that's in 2.6.33 are you targeting? [Micki] We will update the driver and user space application with new features. > + * The driver will support MTM firwmare Pen, Finger (Up to 6) Is this code intended to support older firmwares as well? It would be best not to break the driver for users with legacy firmwares without reason. [Micki] There will be a DEB package for firmware upgrade. > +#define PEN_REPORT_SIZE 0x48 > +#define MAX_FINGERS_SUPPORT 0x06 Are these guaranteed to be kept constant for the foreseeable future? I've already seen hints that N-Trig may move to 10+ fingers in the not to distant future. http://www.n-trig.com/Content.aspx?Page=PressReleases&PressReleaseId=541 I was starting to move to non-fixed finger limits before I pulled the finger tracking code. > - if (field->application == HID_DG_PEN) > - return 0; > + if (PEN_REPORT_SIZE == field->report->size) { What was wrong with using field->application to detect the pen? On a side note, after splitting the touch and pen events to separate input devices, I found that the pen events conform quite well to the hid spec and don't need special handling. Is there something I missed? [Micki] Report Pen is constant , but I will look into it, as you mentioned in your mail > +#define MODULE_NAME "hid_ntrig" > + > + > +#define info(format, arg...) \ > + printk(KERN_INFO "%s: " format , MODULE_NAME , ## arg) > +#define ntrig_dbg(format, arg...) \ > + do { \ > + if (debug) \ > + printk(KERN_DEBUG "%s: " format, \ > + MODULE_NAME , ## arg); \ > + } while (0) > static struct hid_driver ntrig_driver = { > .name = "ntrig", Might want to use the #define for that too. [Micki] : Not A Problem I will change it. > + case HID_DG_CONTACTCOUNT: > + nt_rpt->real_fingers = value; > + nt_rpt->fake_fingers = > MAX_FINGERS_SUPPORT - value; > + if (MAX_FINGERS_SUPPORT > == nt_rpt->fake_fingers--) { Would you care to explain "fake_fingers"? I'm not really seeing why it helps when you already have real_fingers. It looks like you use that to detect some ghost events, but really again, fingers should be fine at that point. That does remind me that I pulled that special case when I cleaned up my last patch set and forgot to put it back. Are the fake finger events intentional or just a bug? [Micki] As I mentioned before we developed a user space application which analyze the data Transferred from driver and the driver need to report about fake fingers. > - case HID_DG_PEN: > - input->name = "N-Trig Pen"; > - break; > - case HID_DG_TOUCHSCREEN: > - input->name = > - (hidinput->report->field[0] > - ->physical) ? > - "N-Trig Touchscreen" : > - "N-Trig MultiTouch"; Do you have something against the device naming, or did you delete that unintentionally? [Micki] When I download a git branch It didn't include this change, I will update the patch with this new change > + /* > + * These command will implement later accroding to > demand > + */ > + case REPORTID_SET_MODE_DUAL: /* FALLTHRU */ > + case REPORTID_CALIBRATION: /* FALLTHRU */ > + case REPORTID_GET_VERSION: /* FALLTHRU */ > + case REPORTID_GET_MODE: /* FALLTHRU */ > + case REPORTID_SET_MODE_PEN: /* FALLTHRU */ > + case REPORTID_SET_MODE_TOUCH: /* FALLTHRU */ > + case REPORTID_CALIBRATION_RESPOND:/* FALLTHRU */ > + case HID_CAPACITORS_CALIB: /* FALLTHRU */ > + case HID_GET_CAPACITORS_CALIB_DONE: Getting the firmware version would be my top priority, its been on my list of things to write for months. I'd like to see the firmware version printed when the module is loaded and available through sysfs. [Micki] Later version we will support Get Version Number I've heard a few people complain about calibration, but most users, including myself, have not seen any calibration issues. Any chance of getting a tool to install firmware updates? [Micki] Later There will be a DEB package on the site you can download and make firmware updates. [Micki] I will update The patch with your new version and will send it again. Rafi -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.10 (GNU/Linux) Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org/ iEYEARECAAYFAkuUVBkACgkQwuRiAT9o60+htACgt+S+ON/9GWwXP+dliEU9GdQN TaoAoPUW4Ndlfg0MAWnoEcg4H1ZHU1VO =NQkb -----END PGP SIGNATURE----- -- 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
