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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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