-----Original Message-----
> From: platform-driver-x86-owner@xxxxxxxxxxxxxxx <platform-driver-x86-
> owner@xxxxxxxxxxxxxxx> On Behalf Of Jiaxun Yang
> Sent: Thursday, March 7, 2019 2:08 AM
> To: ibm-acpi@xxxxxxxxxx
> Cc: dvhart@xxxxxxxxxxxxx; andy@xxxxxxxxxxxxx; ibm-acpi-
> devel@xxxxxxxxxxxxxxxxxxxxx; platform-driver-x86@xxxxxxxxxxxxxxx; linux-
> kernel@xxxxxxxxxxxxxxx; stable@xxxxxxxxxxxxxxx; Jiaxun Yang
> Subject: [PATCH] platform/x86: thinkpad_acpi: disable bluetooth for some
> machines
>
>
> [EXTERNAL EMAIL]
>
> Some AMD based ThinkPads have a firmware bug that calling
> "GBDC" will cause bluetooth on Intel wireless cards blocked.
Since this is considered a firmware bug; has the OEM (and IBV) been notified? Is it
fixed in a newer version of the firmware?
If so, then this should probably only match particular broken firmware versions.
>
> Probe these models by DMI match and disable bluetooth subdriver
> if specified Intel wireless card exist.
>
> Signed-off-by: Jiaxun Yang <jiaxun.yang@xxxxxxxxxxx>
> ---
> drivers/platform/x86/thinkpad_acpi.c | 70 ++++++++++++++++++++++++++++
> 1 file changed, 70 insertions(+)
>
> diff --git a/drivers/platform/x86/thinkpad_acpi.c
> b/drivers/platform/x86/thinkpad_acpi.c
> index 726341f2b638..29e835f9368a 100644
> --- a/drivers/platform/x86/thinkpad_acpi.c
> +++ b/drivers/platform/x86/thinkpad_acpi.c
> @@ -79,6 +79,7 @@
> #include <linux/jiffies.h>
> #include <linux/workqueue.h>
> #include <linux/acpi.h>
> +#include <linux/pci.h>
> #include <linux/pci_ids.h>
> #include <linux/power_supply.h>
> #include <sound/core.h>
> @@ -4501,11 +4502,80 @@ static void bluetooth_exit(void)
> bluetooth_shutdown();
> }
>
> +static const struct dmi_system_id bt_fwbug_list[] __initconst = {
> + {
> + .ident = "ThinkPad E485",
> + .matches = {
> + DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
> + DMI_MATCH(DMI_BOARD_NAME, "20KU"),
> + },
> + },
> + {
> + .ident = "ThinkPad E585",
> + .matches = {
> + DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
> + DMI_MATCH(DMI_BOARD_NAME, "20KV"),
> + },
> + },
> + {
> + .ident = "ThinkPad A285 - 20MW",
> + .matches = {
> + DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
> + DMI_MATCH(DMI_BOARD_NAME, "20MW"),
> + },
> + },
> + {
> + .ident = "ThinkPad A285 - 20MX",
> + .matches = {
> + DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
> + DMI_MATCH(DMI_BOARD_NAME, "20MX"),
> + },
> + },
> + {
> + .ident = "ThinkPad A485 - 20MU",
> + .matches = {
> + DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
> + DMI_MATCH(DMI_BOARD_NAME, "20MU"),
> + },
> + },
> + {
> + .ident = "ThinkPad A485 - 20MV",
> + .matches = {
> + DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
> + DMI_MATCH(DMI_BOARD_NAME, "20MV"),
> + },
> + },
> + {}
> +};
> +
> +static int __init have_bt_fwbug(void)
> +{
> + /* Some AMD based ThinkPads have a firmware bug that calling
> + * "GBDC" will cause bluetooth on Intel wireless cards blocked
> + */
> + if (dmi_check_system(bt_fwbug_list)) {
> + if (pci_get_device(PCI_VENDOR_ID_INTEL, 0x24F3, NULL) || \
> + pci_get_device(PCI_VENDOR_ID_INTEL, 0x24FD, NULL) || \
> + pci_get_device(PCI_VENDOR_ID_INTEL, 0x2526, NULL))
> + return 1;
> + else
> + return 0;
> + } else {
> + return 0;
> + }
> +}
> +
> static int __init bluetooth_init(struct ibm_init_struct *iibm)
> {
> int res;
> int status = 0;
>
> + if (have_bt_fwbug()) {
> + vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
> + FW_BUG "disable bluetooth subdriver for Intel cards\n");
> + return 1;
> + }
> +
> vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
> "initializing bluetooth subdriver\n");
>
> --
> 2.20.1
