> On 29-Nov-2021, at 7:30 PM, Aditya Garg <gargaditya08@xxxxxxxx> wrote: > > From: Aditya Garg <gargaditya08@xxxxxxxx> > > Some Macs with the T2 security chip had Bluetooth not working. > To fix it we add DMI based quirks to disable querying of LE Tx power. > > Signed-off-by: Aditya Garg <gargaditya08@xxxxxxxx> > Reported-by: Orlando Chamberlain <redecorating@xxxxxxxxxxxxxx> > Link: > https://lore.kernel.org/r/4970a940-211b-25d6-edab-21a815313954@xxxxxxxxxxxxxx > Fixes: 7c395ea521e6 ("Bluetooth: Query LE tx power on startup") > --- > drivers/bluetooth/btbcm.c | 40 +++++++++++++++++++++++++++++++++++++++ > 1 file changed, 40 insertions(+) > > diff --git a/drivers/bluetooth/btbcm.c b/drivers/bluetooth/btbcm.c > index e4182acee488c5..40f7c9c5cf0a5a 100644 > --- a/drivers/bluetooth/btbcm.c > +++ b/drivers/bluetooth/btbcm.c > @@ -8,6 +8,7 @@ > > #include <linux/module.h> > #include <linux/firmware.h> > +#include <linux/dmi.h> > #include <asm/unaligned.h> > > #include <net/bluetooth/bluetooth.h> > @@ -343,9 +344,44 @@ static struct sk_buff *btbcm_read_usb_product(struct hci_dev *hdev) > return skb; > } > > +static const struct dmi_system_id disable_broken_read_transmit_power[] = { > + { > + .matches = { > + DMI_MATCH(DMI_BOARD_VENDOR, "Apple Inc."), > + DMI_MATCH(DMI_PRODUCT_NAME, "MacBookPro16,1"), > + }, > + }, > + { > + .matches = { > + DMI_MATCH(DMI_BOARD_VENDOR, "Apple Inc."), > + DMI_MATCH(DMI_PRODUCT_NAME, "MacBookPro16,2"), > + }, > + }, > + { > + .matches = { > + DMI_MATCH(DMI_BOARD_VENDOR, "Apple Inc."), > + DMI_MATCH(DMI_PRODUCT_NAME, "MacBookPro16,4"), > + }, > + }, > + { > + .matches = { > + DMI_MATCH(DMI_BOARD_VENDOR, "Apple Inc."), > + DMI_MATCH(DMI_PRODUCT_NAME, "iMac20,1"), > + }, > + }, > + { > + .matches = { > + DMI_MATCH(DMI_BOARD_VENDOR, "Apple Inc."), > + DMI_MATCH(DMI_PRODUCT_NAME, "iMac20,2"), > + }, > + }, > + { } > +}; > + > static int btbcm_read_info(struct hci_dev *hdev) > { > struct sk_buff *skb; > + const struct dmi_system_id; > > /* Read Verbose Config Version Info */ > skb = btbcm_read_verbose_config(hdev); > @@ -363,6 +399,10 @@ static int btbcm_read_info(struct hci_dev *hdev) > bt_dev_info(hdev, "BCM: features 0x%2.2x", skb->data[1]); > kfree_skb(skb); > > + /* Read DMI and disable broken Read LE Min/Max Tx Power */ > + if (dmi_first_match(disable_broken_read_transmit_power)) > + set_bit(HCI_QUIRK_BROKEN_READ_TRANSMIT_POWER, &hdev->quirks); > + > return 0; > } > May I know whether this is fine or not. >
