Re: [PATCH 4/4] Input: wacom: Handle 1024 pressure levels in wacom_tpc_pen
From: Aaron Armstrong Skomra <hidden>
Date: 2014-02-27 18:40:42
On Thu, Jan 30, 2014 at 10:48 AM, Jason Gerecke [off-list ref] wrote:
quoted hunk ↗ jump to hunk
Some tablet PC sensors (e.g. the 0xEC found in the Thinkpad Yoga) report more than 256 pressure levels and will experience wraparound unless the full range is read. Signed-off-by: Jason Gerecke <redacted> --- drivers/input/tablet/wacom_wac.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)diff --git a/drivers/input/tablet/wacom_wac.c b/drivers/input/tablet/wacom_wac.c index 9ff5613..ae1437b 100644 --- a/drivers/input/tablet/wacom_wac.c +++ b/drivers/input/tablet/wacom_wac.c@@ -1087,7 +1087,7 @@ static int wacom_tpc_pen(struct wacom_wac *wacom) input_report_key(input, BTN_STYLUS2, data[1] & 0x10); input_report_abs(input, ABS_X, le16_to_cpup((__le16 *)&data[2])); input_report_abs(input, ABS_Y, le16_to_cpup((__le16 *)&data[4])); - input_report_abs(input, ABS_PRESSURE, ((data[7] & 0x01) << 8) | data[6]); + input_report_abs(input, ABS_PRESSURE, ((data[7] & 0x03) << 8) | data[6]); input_report_key(input, BTN_TOUCH, data[1] & 0x05); input_report_key(input, wacom->tool[0], prox); return 1; --1.8.5.3
Tested-by: Aaron Skomra <redacted>