Hello, and thanks for letting me know. I'll keep your suggestions in mind the next time I have something to post. Thanks to everyone for helping debug and get my patch into the kernel, now I can use my laptop more easily! :) On Tue, Jan 14, 2025 at 6:58 AM Wolfram Sang <wsa+renesas@xxxxxxxxxxxxxxxxxxxx> wrote: > > On Mon, Jan 13, 2025 at 02:52:37PM -0500, Randolph Ha wrote: > > When a 400KHz freq is used on this model of ELAN touchpad in Linux, > > excessive smoothing (similar to when the touchpad's firmware detects > > a noisy signal) is sometimes applied. As some devices' (e.g, Lenovo > > V15 G4) ACPI tables specify a 400KHz frequency for this device and > > some I2C busses (e.g, Designware I2C) default to a 400KHz freq, > > force the speed to 100KHz as a workaround. > > > > For future investigation: This problem may be related to the default > > HCNT/LCNT values given by some busses' drivers, because they are not > > specified in the aforementioned devices' ACPI tables, and because > > the device works without issues on Windows at what is expected to be > > a 400KHz frequency. The root cause of the issue is not known. > > > > Signed-off-by: Randolph Ha <rha051117@xxxxxxxxx> > > Reviewed-by: Mika Westerberg <mika.westerberg@xxxxxxxxxxxxxxx> > > Applied to for-next, thanks! > > Some comments for next contributions. Please send new patches always in > a new thread. It was a bit confusing here to find the latest one. > > Also, while the code change looks easy, this is not a trivial change, so > trivial@ is not appropriate here. Trivial patches are more like typos or > whitespace fixes. > > Nonetheless, thanks again for your efforts in timely debugging this! >
