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 <hdegoede@xxxxxxxxxx> Signed-off-by: Hans de Goede <hdegoede@xxxxxxxxxx> Reviewed-by: Bastien Nocera <hadess@xxxxxxxxxx> --- Changes in v2: -Mention the problems this fix + devices tested on in commit msg -Add BugLinks and Tested-by to commit msg Changes in v3: -Fix typo in commit msg -Add Bastien's Reviewed-by --- 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 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 -- 2.14.3 -- To unsubscribe from this list: send the line "unsubscribe linux-input" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
