From: Hans de Goede hdegoede@redhat.com
[ Upstream commit faec44b6838312484d63e82286087cf2d5ebb891 ]
We should not try to do any i2c transfers before the controller is resumed (which happens before our resume method gets called).
So we need to disable our IRQ while suspended to enforce this. The code paths for devices with GPIOs for the int and reset pins already disable the IRQ the through goodix_free_irq().
This commit also disables the IRQ while suspended for devices without GPIOs for the int and reset pins.
This fixes the i2c bus sometimes getting stuck after a suspend/resume causing the touchscreen to sometimes not work after a suspend/resume. This has been tested on a GPD pocked device.
BugLink: https://github.com/nexus511/gpd-ubuntu-packages/issues/10 BugLink: https://www.reddit.com/r/GPDPocket/comments/7niut2/fix_for_broken_touch_afte... Tested-by: Hans de Goede hdegoede@redhat.com Signed-off-by: Hans de Goede hdegoede@redhat.com Reviewed-by: Bastien Nocera hadess@hadess.net Signed-off-by: Dmitry Torokhov dmitry.torokhov@gmail.com Signed-off-by: Sasha Levin alexander.levin@microsoft.com --- drivers/input/touchscreen/goodix.c | 8 ++++++-- 1 file changed, 6 insertions(+), 2 deletions(-)
diff --git a/drivers/input/touchscreen/goodix.c b/drivers/input/touchscreen/goodix.c index 240b16f3ee97..5907fddcc966 100644 --- a/drivers/input/touchscreen/goodix.c +++ b/drivers/input/touchscreen/goodix.c @@ -778,8 +778,10 @@ static int __maybe_unused goodix_suspend(struct device *dev) int error;
/* We need gpio pins to suspend/resume */ - if (!ts->gpiod_int || !ts->gpiod_rst) + if (!ts->gpiod_int || !ts->gpiod_rst) { + disable_irq(client->irq); return 0; + }
wait_for_completion(&ts->firmware_loading_complete);
@@ -819,8 +821,10 @@ static int __maybe_unused goodix_resume(struct device *dev) struct goodix_ts_data *ts = i2c_get_clientdata(client); int error;
- if (!ts->gpiod_int || !ts->gpiod_rst) + if (!ts->gpiod_int || !ts->gpiod_rst) { + enable_irq(client->irq); return 0; + }
/* * Exit sleep mode by outputting HIGH level to INT pin