On 1/27/2014 15:40, simon@xxxxxxxxxxxxx wrote:
No, the HID layer tracks the current state and only sends events when something changes so there is no need to shadow it again. If you watch the output in evtest, events are only sent when something changes. All this does is manually parse the touch data for the HID layer.+ for (n = 0; n < 2; n++) { + __u16 x, y; + + x = rd[offset+1] | ((rd[offset+2] & 0xF) << 8); + y = ((rd[offset+2] & 0xF0) >> 4) | (rd[offset+3] << 4); + + input_mt_slot(input_dev, n); + input_mt_report_slot_state(input_dev, MT_TOOL_FINGER, + !(rd[offset] >> 7)); + input_report_abs(input_dev, ABS_MT_POSITION_X, x); + input_report_abs(input_dev, ABS_MT_POSITION_Y, y); + + offset += 4; + }Sorry I have another point/question.... Doesn't this 'spam' the Multitouch interface every incoming report, regardless on whether anything has actually change? ie. Should HID-Sony track the values, and only send when it detects a change... Simon
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