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    Subject[PATCH] hid-input: Use a larger event buffer for MT devices
    Date
    The MT devices produce a lot of data. Tell the underlying input device
    approximately how many events will be sent per synchronization, to allow
    for better buffering. The number is a template based on continuously
    reporting details for each finger on a single hand.

    Signed-off-by: Henrik Rydberg <rydberg@euromail.se>
    ---
    Hi Jiri,

    This patch goes together with the evdev buffer patchset, which Dmitry
    is going to queue for 2.6.36.

    Cheers,
    Henrik

    drivers/hid/hid-input.c | 3 +++
    1 files changed, 3 insertions(+), 0 deletions(-)

    diff --git a/drivers/hid/hid-input.c b/drivers/hid/hid-input.c
    index 7a0d2e4..69d152e 100644
    --- a/drivers/hid/hid-input.c
    +++ b/drivers/hid/hid-input.c
    @@ -534,6 +534,9 @@ mapped:
    input_set_abs_params(input, usage->code, a, b, (b - a) >> 8, (b - a) >> 4);
    else input_set_abs_params(input, usage->code, a, b, 0, 0);

    + /* use a larger default input buffer for MT devices */
    + if (usage->code == ABS_MT_POSITION_X && input->hint_events_per_packet == 0)
    + input_set_events_per_packet(input, 60);
    }

    if (usage->type == EV_ABS &&
    --
    1.6.3.3


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