Some AMD based ThinkPads have a firmware bug that calling
"GBDC" will cause bluetooth on Intel wireless cards blocked.
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
