Hi, On Thu, Jun 8, 2023 at 11:36 PM Cong Yang <yangcong5@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxx> wrote: > > The ili9882t is a TDDI IC (Touch with Display Driver). The > datasheet specifies there should be 60ms between touch SDA > sleep and panel RESX. Doug's series[1] allows panels and > touchscreens to power on/off together, so we can add the 65 ms > delay in i2c_hid_core_suspend before panel_unprepare. > > Because ili9882t touchscrgeen is a panel follower, and > needs to use vccio-supply instead of vcc33-supply, so set > it NULL to ili9882t_chip_data, then not use vcc33 regulator. > > [1]: https://lore.kernel.org/r/20230607215224.2067679-1-dianders@xxxxxxxxxxxx > > Signed-off-by: Cong Yang <yangcong5@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxx> > --- > drivers/hid/i2c-hid/i2c-hid-of-elan.c | 50 ++++++++++++++++++++------- > 1 file changed, 38 insertions(+), 12 deletions(-) This seems reasonable to me now, but only makes sense to land if the panel follower patch series [1] lands. That series is currently at v2 and will at least need a v3. [1] https://lore.kernel.org/r/20230607215224.2067679-1-dianders@xxxxxxxxxxxx
