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Bluetooth: hci_bcm: Treat Interrupt ACPI resources as always being active-low 

commit bb5208b314 upstream.

Older devices with a serdev attached bcm bt hci, use an Interrupt ACPI
resource to describe the IRQ (rather then a GpioInt resource).

These device seem to all claim the IRQ is active-high and seem to all need
a DMI quirk to treat it as active-low. Instead simply always assume that
Interrupt resource specified IRQs are always active-low.

This fixes the bt device not being able to wake the host from runtime-
suspend on the: Asus T100TAM, Asus T200TA, Lenovo Yoga2 and the Toshiba
Encore, without the need to add 4 new DMI quirks for these models.

This also allows us to remove 2 DMI quirks for the Asus T100TA and Asus
T100CHI series. Likely the 2 remaining quirks can also be removed but I
could not find a DSDT of these devices to verify this.

Cc: stable@vger.kernel.org
Buglink: https://bugzilla.kernel.org/show_bug.cgi?id=198953
Buglink: https://bugzilla.redhat.com/show_bug.cgi?id=1554835
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
pull/10/head
Hans de Goede 2018-03-16 21:28:08 +01:00 committed by Greg Kroah-Hartman
parent f58ef38ef1
commit 9e483bc229
1 changed files with 3 additions and 17 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

20
drivers/bluetooth/hci_bcm.c
View File

@ -694,22 +694,6 @@ static const struct acpi_gpio_mapping acpi_bcm_int_first_gpios[] = {
#ifdef CONFIG_ACPI
/* IRQ polarity of some chipsets are not defined correctly in ACPI table. */
static const struct dmi_system_id bcm_active_low_irq_dmi_table[] = {
{
.ident = "Asus T100TA",
.matches = {
DMI_EXACT_MATCH(DMI_SYS_VENDOR,
"ASUSTeK COMPUTER INC."),
DMI_EXACT_MATCH(DMI_PRODUCT_NAME, "T100TA"),
},
},
{
.ident = "Asus T100CHI",
.matches = {
DMI_EXACT_MATCH(DMI_SYS_VENDOR,
"ASUSTeK COMPUTER INC."),
DMI_EXACT_MATCH(DMI_PRODUCT_NAME, "T100CHI"),
},
},
{ /* Handle ThinkPad 8 tablets with BCM2E55 chipset ACPI ID */
.ident = "Lenovo ThinkPad 8",
.matches = {
@ -730,7 +714,9 @@ static int bcm_resource(struct acpi_resource *ares, void *data)
switch (ares->type) {
case ACPI_RESOURCE_TYPE_EXTENDED_IRQ:
irq = &ares->data.extended_irq;
dev->irq_active_low = irq->polarity == ACPI_ACTIVE_LOW;
if (irq->polarity != ACPI_ACTIVE_LOW)
dev_info(&dev->pdev->dev, "ACPI Interrupt resource is active-high, this is usually wrong, treating the IRQ as active-low\n");
dev->irq_active_low = true;
break;
case ACPI_RESOURCE_TYPE_GPIO: