Hi Dmitry, I double check with our firmware team and the SPEC, it looks like the subtract 1 just a misunderstanding. So, the correct should not subtract 1. For example, if the touchpad x resolution is 2800 and x trace number is 20, the pitch size of x should be 2800/20 = 140, not 2800/19 = 147.36.
---------------------------------------------- Thanks, ELAN Duson ✉ Email: duson...@emc.com.tw ---------------------------------------------- > Dmitry Torokhov <dmitry.torok...@gmail.com> 於 2015年4月16日 上午1:47 寫道： > > On Wed, Apr 15, 2015 at 09:55:43AM +0800, DusonLin wrote: >> The trace number does not need to subtract 1 now. > > Could you provide a bit more of background for this change? Why don't we > need to decrement the number returned by the firmware anymore? We have > been running with the old numbers for many years... > > Thanks! > >> >> Signed-off-by: Duson Lin <duson...@emc.com.tw> >> --- >> drivers/input/mouse/elan_i2c_i2c.c | 4 ++-- >> drivers/input/mouse/elan_i2c_smbus.c | 4 ++-- >> 2 files changed, 4 insertions(+), 4 deletions(-) >> >> diff --git a/drivers/input/mouse/elan_i2c_i2c.c >> b/drivers/input/mouse/elan_i2c_i2c.c >> index 029941f..550f905 100644 >> --- a/drivers/input/mouse/elan_i2c_i2c.c >> +++ b/drivers/input/mouse/elan_i2c_i2c.c >> @@ -356,8 +356,8 @@ static int elan_i2c_get_num_traces(struct i2c_client >> *client, >> return error; >> } >> >> - *x_traces = val[0] - 1; >> - *y_traces = val[1] - 1; >> + *x_traces = val[0]; >> + *y_traces = val[1]; >> >> return 0; >> } >> diff --git a/drivers/input/mouse/elan_i2c_smbus.c >> b/drivers/input/mouse/elan_i2c_smbus.c >> index 06a2bcd..0b04151 100644 >> --- a/drivers/input/mouse/elan_i2c_smbus.c >> +++ b/drivers/input/mouse/elan_i2c_smbus.c >> @@ -268,8 +268,8 @@ static int elan_smbus_get_num_traces(struct i2c_client >> *client, >> return error; >> } >> >> - *x_traces = val[1] - 1; >> - *y_traces = val[2] - 1; >> + *x_traces = val[1]; >> + *y_traces = val[2]; >> >> return 0; >> } >> > > -- > Dmitry > -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
