[v6,0/8] Bluetooth: btmtk: MediaTek ISO data transmission support

Message

Chris Lu July 2, 2024, 11:30 a.m. UTC

Since SIG has not yet clearly defined the specification for ISO data
transmission over USB, MediaTek has adopted a method of adding an
additional interrupt endpoint for ISO data transmission. This approach
differs from the current method used in the Bluetooth upstream driver,
which utilizes existing bulk endpoints. The interrupt endpoint provides
guaranteed bandwidth, sufficient maximum data length for ISO packets
and error checking.

Driver sets up ISO interface and endpoints in btusb_mtk_setup and clears
the setup in btusb_mtk_shutdown. These flow can't move to btmtk.c due to
btusb_driver is only defined in btusb.c when claiming/relaesing interface.
Once ISO interface is claimed, driver can use specific interrupt endpoint
to send and receive iso data. ISO packet anchor stops when driver
suspending and resubmit interrupt urb for ISO data when driver resuming.

---
Change from v5 to v6:
fix test bot report error
-move usb.h declaration position to each c file.
-fix returned value in btmtk.h when returning a pointer.
-simplify commit message to avoid word number limitation.
---


Chris Lu (8):
  Bluetooth: btusb: mediatek: remove the unnecessary goto tag
  Bluetooth: btusb: mediatek: return error for failed reg access
  Bluetooth: btmtk: rename btmediatek_data
  Bluetooth: btusb: add callback function in btusb suspend/resume
  Bluetooth: btmtk: move btusb_mtk_hci_wmt_sync to btmtk.c
  Bluetooth: btmtk: move btusb_mtk_[setup, shutdown] to btmtk.c
  Bluetooth: btmtk: move btusb_recv_acl_mtk to btmtk.c
  Bluetooth: btusb: mediatek: add ISO data transmission functions

 drivers/bluetooth/btmtk.c     | 1059 ++++++++++++++++++++++++++++++++-
 drivers/bluetooth/btmtk.h     |   91 ++-
 drivers/bluetooth/btmtksdio.c |    1 +
 drivers/bluetooth/btmtkuart.c |    1 +
 drivers/bluetooth/btusb.c     |  751 +++--------------------
 5 files changed, 1219 insertions(+), 684 deletions(-)