Messages in this thread Patch in this message | | | From | Dmitry Torokhov <> | Subject | Re: synaptics mouse jitter in 2.6.0 | Date | Tue, 23 Dec 2003 02:41:49 -0500 |
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On Monday 22 December 2003 10:38 pm, Dmitry Torokhov wrote: > On Monday 22 December 2003 09:40 pm, Thomas Molina wrote: > > I am running Fedora Core 1 updated on a Presario 12XL325 laptop. For > > a long time during the 2.5 series I couldn't use the synaptics > > support. As a result, I haven't tested this for some time. I just > > compiled a fresh 2.6.0 tree, included synaptics support and now I am > > getting mouse jitter. > > <..SKIP..> > > Right, I think I see it. The mousedev module does not do any smoothing > of the reported coordinates which would cause the jitter you are > seeing. Normally drivers do 3- or 4-point average. > > I'll cook up something to fix it. Meanwhile could you give a try Peter > Osterlund XFree86 Synaptics driver: > http://w1.894.telia.com/~u89404340/touchpad/index.html >
OK, here it is. It will apply against 2.6.0 although will complain about some offsets as I have extra stuff in my tree...
Dmitry
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ChangeSet@1.1522, 2003-12-23 02:24:12-05:00, dtor_core@ameritech.net Input: when calculating deltas for touchpads that generate absolute events use average over the last 3 packets to remove jitter
mouse/synaptics.c | 11 ++++--- mousedev.c | 84 +++++++++++++++++++++++++++++++----------------------- 2 files changed, 56 insertions(+), 39 deletions(-)
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diff -Nru a/drivers/input/mouse/synaptics.c b/drivers/input/mouse/synaptics.c --- a/drivers/input/mouse/synaptics.c Tue Dec 23 02:25:14 2003 +++ b/drivers/input/mouse/synaptics.c Tue Dec 23 02:25:14 2003 @@ -553,15 +553,18 @@ finger_width = 0; } - /* Post events */ + /* Post events + * BTN_TOUCH has to be first as mousedev relies on it when doing + * absolute -> relative conversion + */ + if (hw.z > 30) input_report_key(dev, BTN_TOUCH, 1); + if (hw.z < 25) input_report_key(dev, BTN_TOUCH, 0); + if (hw.z > 0) { input_report_abs(dev, ABS_X, hw.x); input_report_abs(dev, ABS_Y, YMAX_NOMINAL + YMIN_NOMINAL - hw.y); } input_report_abs(dev, ABS_PRESSURE, hw.z); - - if (hw.z > 30) input_report_key(dev, BTN_TOUCH, 1); - if (hw.z < 25) input_report_key(dev, BTN_TOUCH, 0); input_report_abs(dev, ABS_TOOL_WIDTH, finger_width); input_report_key(dev, BTN_TOOL_FINGER, num_fingers == 1); diff -Nru a/drivers/input/mousedev.c b/drivers/input/mousedev.c --- a/drivers/input/mousedev.c Tue Dec 23 02:25:14 2003 +++ b/drivers/input/mousedev.c Tue Dec 23 02:25:14 2003 @@ -53,12 +53,14 @@ struct fasync_struct *fasync; struct mousedev *mousedev; struct list_head node; - int dx, dy, dz, oldx, oldy; - signed char ps2[6]; + int dx, dy, dz; + int old_x[4], old_y[4]; unsigned long buttons; + signed char ps2[6]; unsigned char ready, buffer, bufsiz; unsigned char mode, imexseq, impsseq; - int finger; + unsigned int pkt_count; + unsigned char touch; }; #define MOUSEDEV_SEQ_LEN 6 @@ -74,49 +76,49 @@ static int xres = CONFIG_INPUT_MOUSEDEV_SCREEN_X; static int yres = CONFIG_INPUT_MOUSEDEV_SCREEN_Y; +#define fx(i) (list->old_x[(list->pkt_count - (i)) & 03]) +#define fy(i) (list->old_y[(list->pkt_count - (i)) & 03]) + static void mousedev_abs_event(struct input_handle *handle, struct mousedev_list *list, unsigned int code, int value) { int size; + int touchpad; /* Ignore joysticks */ if (test_bit(BTN_TRIGGER, handle->dev->keybit)) return; - /* Handle touchpad data */ - if (test_bit(BTN_TOOL_FINGER, handle->dev->keybit)) { + touchpad = test_bit(BTN_TOOL_FINGER, handle->dev->keybit); - if (list->finger && list->finger < 3) - list->finger++; - - switch (code) { - case ABS_X: - if (list->finger == 3) - list->dx += (value - list->oldx) / 8; - list->oldx = value; - return; - case ABS_Y: - if (list->finger == 3) - list->dy -= (value - list->oldy) / 8; - list->oldy = value; - return; - } - return; - } - - /* Handle tablet data */ switch (code) { case ABS_X: - size = handle->dev->absmax[ABS_X] - handle->dev->absmin[ABS_X]; - if (size == 0) size = xres; - list->dx += (value * xres - list->oldx) / size; - list->oldx += list->dx * size; - return; + if (touchpad) { + if (list->touch) { + fx(0) = value; + if (list->pkt_count >= 2) + list->dx = ((fx(0) - fx(1)) / 2 + (fx(1) - fx(2)) / 2) / 8; + } + } else { + size = handle->dev->absmax[ABS_X] - handle->dev->absmin[ABS_X]; + if (size == 0) size = xres; + list->dx += (value * xres - list->old_x[0]) / size; + list->old_x[0] += list->dx * size; + } + break; case ABS_Y: - size = handle->dev->absmax[ABS_Y] - handle->dev->absmin[ABS_Y]; - if (size == 0) size = yres; - list->dy -= (value * yres - list->oldy) / size; - list->oldy -= list->dy * size; - return; + if (touchpad) { + if (list->touch) { + fy(0) = value; + if (list->pkt_count >= 2) + list->dy = -((fy(0) - fy(1)) / 2 + (fy(1) - fy(2)) / 2) / 8; + } + } else { + size = handle->dev->absmax[ABS_Y] - handle->dev->absmin[ABS_Y]; + if (size == 0) size = yres; + list->dy -= (value * yres - list->old_y[0]) / size; + list->old_y[0] -= list->dy * size; + } + break; } } @@ -149,7 +151,9 @@ switch (code) { case BTN_TOUCH: /* Handle touchpad data */ if (test_bit(BTN_TOOL_FINGER, handle->dev->keybit)) { - list->finger = value; + list->touch = value; + if (!list->touch) + list->pkt_count = 0; return; } case BTN_0: @@ -178,6 +182,16 @@ case EV_SYN: switch (code) { case SYN_REPORT: + if (list->touch) { + list->pkt_count++; + /* Input system eats duplicate events, + * but we need all of them to do correct + * averaging so apply present one forward + */ + fx(0) = fx(1); + fy(0) = fy(1); + } + list->ready = 1; kill_fasync(&list->fasync, SIGIO, POLL_IN); wake = 1; - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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