Re: [PATCH 6/6] Input: elantech - add v3 hardware support

Seth Forshee
2011-08-18T13:59:00Z

On Thu, Aug 18, 2011 at 09:57:09AM +0800, JJ Ding wrote:
> v3 hardware's packet format is almost identical to v2 (one/three finger touch),
> except when sensing two finger touch, the hardware sends 12 bytes of data.

This looks mostly similar in substance to the patch I sent, although
with some good improvements resulting from your better knowledge of the
hardware :)

One suggestion below. I'll test as soon as my build finishes.

> @@ -582,10 +739,26 @@ static void elantech_set_input_params(struct psmouse *psmouse)
> input_set_abs_params(dev, ABS_MT_POSITION_X, x_min, x_max, 0, 0);
> input_set_abs_params(dev, ABS_MT_POSITION_Y, y_min, y_max, 0, 0);
> break;
> +
> + case 3:
> + input_set_abs_params(dev, ABS_X, x_min, x_max, 0, 0);
> + input_set_abs_params(dev, ABS_Y, y_min, y_max, 0, 0);
> + /* range of pressure and width is the same as v2 */
> + input_set_abs_params(dev, ABS_PRESSURE, ETP_PMIN_V2,
> + ETP_PMAX_V2, 0, 0);
> + input_set_abs_params(dev, ABS_TOOL_WIDTH, ETP_WMIN_V2,
> + ETP_WMAX_V2, 0, 0);
> + __set_bit(INPUT_PROP_SEMI_MT, dev->propbit);
> + input_mt_init_slots(dev, 2);
> + input_set_abs_params(dev, ABS_MT_POSITION_X, x_min, x_max, 0, 0);
> + input_set_abs_params(dev, ABS_MT_POSITION_Y, y_min, y_max, 0, 0);
> + break;

The case 3 code is nearly identical to case 2. How about this?

case 2:
__set_bit(BTN_TOOL_QUADTAP, dev->keybit);
/* fall through */

case 3:
input_set_abs_params(dev, ABS_X, x_min, x_max, 0, 0);
input_set_abs_params(dev, ABS_Y, y_min, y_max, 0, 0);
/* range of pressure and width is the same as v2 */
input_set_abs_params(dev, ABS_PRESSURE, ETP_PMIN_V2,
ETP_PMAX_V2, 0, 0);
input_set_abs_params(dev, ABS_TOOL_WIDTH, ETP_WMIN_V2,
ETP_WMAX_V2, 0, 0);
__set_bit(INPUT_PROP_SEMI_MT, dev->propbit);
input_mt_init_slots(dev, 2);
input_set_abs_params(dev, ABS_MT_POSITION_X, x_min, x_max, 0, 0);
input_set_abs_params(dev, ABS_MT_POSITION_Y, y_min, y_max, 0, 0);
break;