This is a note to let you know that I've just added the patch titled
Input: goodix - disable IRQs while suspended
to the 4.15-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git%3Ba=su...
The filename of the patch is: input-goodix-disable-irqs-while-suspended.patch and it can be found in the queue-4.15 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree, please let stable@vger.kernel.org know about it.
From foo@baz Mon Apr 9 10:16:32 CEST 2018
From: Hans de Goede hdegoede@redhat.com Date: Fri, 12 Jan 2018 00:36:48 -0800 Subject: Input: goodix - disable IRQs while suspended
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 Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- drivers/input/touchscreen/goodix.c | 8 ++++++-- 1 file changed, 6 insertions(+), 2 deletions(-)
--- a/drivers/input/touchscreen/goodix.c +++ b/drivers/input/touchscreen/goodix.c @@ -878,8 +878,10 @@ static int __maybe_unused goodix_suspend 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 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
Patches currently in stable-queue which might be from hdegoede@redhat.com are
queue-4.15/serdev-fix-serdev_uevent-failure-on-acpi-enumerated-serdev-controllers.patch queue-4.15/acpi-video-default-lcd_only-to-true-on-win8-ready-and-newer-machines.patch queue-4.15/bluetooth-hci_bcm-mandate-presence-of-shutdown-and-device-wake-gpio.patch queue-4.15/input-goodix-disable-irqs-while-suspended.patch queue-4.15/asoc-intel-cht_bsw_rt5645-analog-mic-support.patch queue-4.15/power-supply-axp288_charger-properly-stop-work-on-probe-error-remove.patch queue-4.15/pinctrl-baytrail-enable-glitch-filter-for-gpios-used-as-interrupts.patch