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Bluetooth: hci_bcm: Add broken-irq dmi blacklist and add Meegopad T08 to it 

The Meegopad T08 hdmi-stick (think Intel computestick) has a brcm43430
wifi/bt combo chip. The BCM2E90 ACPI device describing the BT part does
contain a valid ActiveLow GpioInt entry, but the GPIO it points to never
goes low, so either the IRQ pin is not connected, or the ACPI resource-
table points to the wrong GPIO.

Eitherway things will not work if we try to use the specified IRQ, this
commits adds a DMI based broken-irq blacklist and disables use of the IRQ
and thus also runtime-pm for devices on this list.

This blacklist starts with the the Meegopad T08, fixing bluetooth not
working on this hdmi-stick. Since this is not a battery powered device
the loss of runtime-pm is not really an issue.

Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
This commit is contained in:
Hans de Goede 2018-04-03 16:40:20 +02:00 committed by Marcel Holtmann
parent 538e2de104
commit 2b05393b06
1 changed files with 23 additions and 0 deletions
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23
drivers/bluetooth/hci_bcm.c
View File

@ -794,6 +794,20 @@ static const struct acpi_gpio_mapping acpi_bcm_int_first_gpios[] = {
{ },
};
/* Some firmware reports an IRQ which does not work (wrong pin in fw table?) */
static const struct dmi_system_id bcm_broken_irq_dmi_table[] = {
{
.ident = "Meegopad T08",
.matches = {
DMI_EXACT_MATCH(DMI_BOARD_VENDOR,
"To be filled by OEM."),
DMI_EXACT_MATCH(DMI_BOARD_NAME, "T3 MRD"),
DMI_EXACT_MATCH(DMI_BOARD_VERSION, "V1.1"),
},
},
{ }
};
#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[] = {
@ -904,6 +918,8 @@ static int bcm_gpio_set_shutdown(struct bcm_device *dev, bool powered)
static int bcm_get_resources(struct bcm_device *dev)
{
const struct dmi_system_id *dmi_id;
dev->name = dev_name(dev->dev);
if (x86_apple_machine && !bcm_apple_get_resources(dev))
@ -936,6 +952,13 @@ static int bcm_get_resources(struct bcm_device *dev)
dev->irq = gpiod_to_irq(gpio);
}
dmi_id = dmi_first_match(bcm_broken_irq_dmi_table);
if (dmi_id) {
dev_info(dev->dev, "%s: Has a broken IRQ config, disabling IRQ support / runtime-pm\n",
dmi_id->ident);
dev->irq = 0;
}
dev_dbg(dev->dev, "BCM irq: %d\n", dev->irq);
return 0;
}