Re: [PATCH v2] HID: i2c-hid: Add a small delay after sleep command for Raydium touchpanel
From: Jiri Kosina
Date: Fri Oct 26 2018 - 11:09:45 EST
On Fri, 5 Oct 2018, Kai-Heng Feng wrote:
> Raydium touchpanel (2386:4B33) sometimes does not work in desktop session
> although it works in display manager.
> During user logging, the display manager exits, close the HID device,
> then the device gets runtime suspended and powered off. The desktop
> session begins shortly after, opens the HID device, then the device gets
> runtime resumed and powered on.
> If the trasition from display manager to desktop sesesion is fast, the
> touchpanel cannot switch from powered off to powered on in short
> timeframe. So add a small delay to workaround the issue.
> Signed-off-by: Kai-Heng Feng <kai.heng.feng@xxxxxxxxxxxxx>
> - Use quirk to only match affected touchpanel
> - Only delay the next power on if the time hasn't elapsed