diff options
| author | Hans de Goede <hdegoede@redhat.com> | 2018-04-03 16:40:20 +0200 |
|---|---|---|
| committer | Marcel Holtmann <marcel@holtmann.org> | 2018-05-18 06:37:50 +0200 |
| commit | 2b05393b063b53648b55ddba751d1cdcd6462a6f (patch) | |
| tree | 990904e136bf9fb14c6d21bbf814acea11b7b698 /drivers/bluetooth | |
| parent | 538e2de104cfb4ef1acb35af42427bff42adbe4d (diff) | |
| download | linux-rt-2b05393b063b53648b55ddba751d1cdcd6462a6f.tar.gz | |
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>
Diffstat (limited to 'drivers/bluetooth')
| -rw-r--r-- | drivers/bluetooth/hci_bcm.c | 23 |
1 files changed, 23 insertions, 0 deletions
diff --git a/drivers/bluetooth/hci_bcm.c b/drivers/bluetooth/hci_bcm.c index 441f5e1deb11..4dccb50089d7 100644 --- a/drivers/bluetooth/hci_bcm.c +++ b/drivers/bluetooth/hci_bcm.c @@ -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; } |