Hello,
On Tue, Feb 25, 2025 at 12:55 PM Luiz Augusto von Dentz
<luiz.dentz@xxxxxxxxx> wrote:
>
> Hi Pedro,
>
> On Mon, Feb 24, 2025 at 7:27 PM Pedro Nishiyama
> <nishiyama.pedro@xxxxxxxxx> wrote:
> >
> > Hi Luiz,
> >
> > On Mon, Feb 24, 2025 at 6:36 PM Luiz Augusto von Dentz
> > <luiz.dentz@xxxxxxxxx> wrote:
> > >
> > > Hi Pedro,
> > >
> > > On Mon, Feb 24, 2025 at 3:54 PM Pedro Nishiyama
> > > <nishiyama.pedro@xxxxxxxxx> wrote:
> > > >
> > > > This adds quirks for broken READ_VOICE_SETTING and READ_PAGE_SCAN_TYPE.
> > > >
> > > > Signed-off-by: Pedro Nishiyama <nishiyama.pedro@xxxxxxxxx>
> > > > ---
> > > > include/net/bluetooth/hci.h | 16 ++++++++++++++++
> > > > net/bluetooth/hci_sync.c | 6 ++++++
> > > > 2 files changed, 22 insertions(+)
> > > >
> > > > diff --git a/include/net/bluetooth/hci.h b/include/net/bluetooth/hci.h
> > > > index 0d51970d809f..b99818df8ee7 100644
> > > > --- a/include/net/bluetooth/hci.h
> > > > +++ b/include/net/bluetooth/hci.h
> > > > @@ -354,6 +354,22 @@ enum {
> > > > * during the hdev->setup vendor callback.
> > > > */
> > > > HCI_QUIRK_FIXUP_LE_EXT_ADV_REPORT_PHY,
> > > > +
> > > > + /* When this quirk is set, the HCI_OP_READ_VOICE_SETTING command is
> > > > + * skipped. This is required for a subset of the CSR controller clones
> > > > + * which erroneously claim to support it.
> > > > + *
> > > > + * This quirk must be set before hci_register_dev is called.
> > > > + */
> > > > + HCI_QUIRK_BROKEN_READ_VOICE_SETTING,
> > >
> > > Lets split this in 2 parts, one for voice setting and another for page
> > > scan type.
> > >
> > > > + /* When this quirk is set, the HCI_OP_READ_PAGE_SCAN_TYPE command is
> > > > + * skipped. This is required for a subset of the CSR controller clones
> > > > + * which erroneously claim to support it.
> > > > + *
> > > > + * This quirk must be set before hci_register_dev is called.
> > > > + */
> > > > + HCI_QUIRK_BROKEN_READ_PAGE_SCAN_TYPE,
> > > > };
> > > >
> > > > /* HCI device flags */
> > > > diff --git a/net/bluetooth/hci_sync.c b/net/bluetooth/hci_sync.c
> > > > index dd770ef5ec36..e76012956020 100644
> > > > --- a/net/bluetooth/hci_sync.c
> > > > +++ b/net/bluetooth/hci_sync.c
> > > > @@ -3696,6 +3696,9 @@ static int hci_read_local_name_sync(struct hci_dev *hdev)
> > > > /* Read Voice Setting */
> > > > static int hci_read_voice_setting_sync(struct hci_dev *hdev)
> > > > {
> > > > + if (test_bit(HCI_QUIRK_BROKEN_READ_VOICE_SETTING, &hdev->quirks))
> > > > + return 0;
> > >
> > > While at it I'd add the checking for the bit as well, that said
> > > perhaps we need to disable SCO link if voice settings cannot be read,
> > > is the controller able to create SCO connections?
> >
> > I did some tests on the version before the regression and with the patches.
> > It is possible to create an SCO connection, but the connection is not usable.
> > Before the regression there is no sound, and with the patches, dmesg
> > is spammed with "Bluetooth: hci0: corrupted SCO packet".
>
> Then perhaps we should disable SCO support if it doesn't support read
> voice settings.
I'm having some trouble disabling SCO. We can't add BTUSB_BROKEN_ISOC
to the drivers quirks because not all 0a12:0001 are clones with broken
READ_VOICE_SETTING.
The fake identification is done after the btusb_probe, and we set up
the isoc during the btusb_probe.
I'm not sure if removing the isoc device file and releasing its
interface in the hdev->setup is actually safe.
>
> > >
> > > > return __hci_cmd_sync_status(hdev, HCI_OP_READ_VOICE_SETTING,
> > > > 0, NULL, HCI_CMD_TIMEOUT);
> > > > }
> > > > @@ -4132,6 +4135,9 @@ static int hci_read_page_scan_type_sync(struct hci_dev *hdev)
> > > > if (!(hdev->commands[13] & 0x01))
> > > > return 0;
> > > >
> > > > + if (test_bit(HCI_QUIRK_BROKEN_READ_PAGE_SCAN_TYPE, &hdev->quirks))
> > > > + return 0;
> > > > +
> > > > return __hci_cmd_sync_status(hdev, HCI_OP_READ_PAGE_SCAN_TYPE,
> > > > 0, NULL, HCI_CMD_TIMEOUT);
> > > > }
> > > > --
> > > > 2.48.1
> > > >
> > >
> > >
> > > --
> > > Luiz Augusto von Dentz
> >
> >
> > --
> > Pedro Nishiyama
>
>
>
> --
> Luiz Augusto von Dentz
