From faec44b6838312484d63e82286087cf2d5ebb891 Mon Sep 17 00:00:00 2001 From: Hans de Goede Date: Fri, 12 Jan 2018 00:36:48 -0800 Subject: Input: goodix - disable IRQs while suspended 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_after_resume_all_linux/ Tested-by: Hans de Goede Signed-off-by: Hans de Goede Reviewed-by: Bastien Nocera Signed-off-by: Dmitry Torokhov --- drivers/input/touchscreen/goodix.c | 8 ++++++-- 1 file changed, 6 insertions(+), 2 deletions(-) (limited to 'drivers/input') diff --git a/drivers/input/touchscreen/goodix.c b/drivers/input/touchscreen/goodix.c index 69d0b8cbc71f..ecec8eb17f28 100644 --- a/drivers/input/touchscreen/goodix.c +++ b/drivers/input/touchscreen/goodix.c @@ -878,8 +878,10 @@ 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); @@ -919,8 +921,10 @@ 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 -- cgit