[PATCH] Input: goodix - Workaround Cherry Trail devices with a bogus ACPI Interrupt() resource
flat view
STALE1682d
LANDED
From: Hans de Goede <hidden>
Date: 2022-02-28 11:16:28
Subsystem:
goodix touchscreen, input (keyboard, mouse, joystick, touchscreen) drivers, the rest · Maintainers:
Hans de Goede, Dmitry Torokhov, Linus Torvalds
Landed in mainline as d98299266973 on 2022-03-01.
ACPI/x86 devices with a Cherry Trail SoC should have a GpioInt + a regular GPIO ACPI resource in their ACPI tables. Some CHT devices have a bug, where the also is bogus Interrupt resource (likely copied from a previous Bay Trail based generation of the device). The i2c-core-acpi code will assign the bogus, non-working, Interrupt resource to client->irq. Add a workaround to fix this up. BugLink: https://bugzilla.redhat.com/show_bug.cgi?id=2043960 Signed-off-by: Hans de Goede <redacted> --- Note this depends on "[PATCH v2 5/5] Input: goodix - Use the new soc_intel_is_byt() helper" from this series: https://lore.kernel.org/linux-input/20220131143539.109142-1-hdegoede@redhat.com/ (local) --- drivers/input/touchscreen/goodix.c | 16 +++++++++++++++- 1 file changed, 15 insertions(+), 1 deletion(-)
diff --git a/drivers/input/touchscreen/goodix.c b/drivers/input/touchscreen/goodix.c
index dac19a790c35..3ad9870db108 100644
--- a/drivers/input/touchscreen/goodix.c
+++ b/drivers/input/touchscreen/goodix.c@@ -854,7 +854,7 @@ static int goodix_add_acpi_gpio_mappings(struct goodix_ts_data *ts) const struct acpi_gpio_mapping *gpio_mapping = NULL; struct device *dev = &ts->client->dev; LIST_HEAD(resources); - int ret; + int irq, ret; ts->gpio_count = 0; ts->gpio_int_idx = -1;
@@ -867,6 +867,20 @@ static int goodix_add_acpi_gpio_mappings(struct goodix_ts_data *ts) acpi_dev_free_resource_list(&resources); + /* + * CHT devices should have a GpioInt + a regular GPIO ACPI resource. + * Some CHT devices have a bug (where the also is bogus Interrupt + * resource copied from a previous BYT based generation). i2c-core-acpi + * will use the non-working Interrupt resource, fix this up. + */ + if (soc_intel_is_cht() && ts->gpio_count == 2 && ts->gpio_int_idx != -1) { + irq = acpi_dev_gpio_irq_get(ACPI_COMPANION(dev), 0); + if (irq > 0 && irq != ts->client->irq) { + dev_warn(dev, "Overriding IRQ %d -> %d\n", ts->client->irq, irq); + ts->client->irq = irq; + } + } + if (ts->gpio_count == 2 && ts->gpio_int_idx == 0) { ts->irq_pin_access_method = IRQ_PIN_ACCESS_ACPI_GPIO; gpio_mapping = acpi_goodix_int_first_gpios;
--
2.35.1