lkml.org 
[lkml]   [2018]   [Dec]   [20]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
    /
    From
    Subject[PATCH v5 0/5] Bug fixes for Qualcomm BT chip wcn3990
    Date
    The below issues are found in the recent testing.

    1. Observed device is not going into off state or not responding.
    As wcn3990 require a power pulses to turn on the irrespctive of
    igniting regulators, it was observed that power on or power off
    pulses are not in sync with respective to chip.
    The below patch will help us to wait until byte is pushed on to wires.

    * Bluetooth: hci_qca: use wait_until_sent() for power pulses

    2. Observed Chip responding when we are in sleep.
    This is due to turn on flow control during change baudrate request.
    The below patch will only pull the RTS line high instead of turning off
    the flow.

    * Bluetooth: hci_qca: Pull RTS line high for baudrate change command.

    3. Frame reassembly errors splashing on console.
    wcn3990 requires will use multiple baudrates during booting stage.
    i.e. 2400 bps while sending power off pulse
    115200 bps while sending power on pulse
    port close
    port open
    set baudrate to 115200 request the chip version.

    during above process, we are seeing some stray bytes coming up
    on the UART Rx FIFO it could be due to frequent baudrate change.

    This patch will stop the frame reassembly errors.

    * Bluetooth: hci_qca: Fix frame reassembly errors for wcn3990

    4. Disable IBS state machine and flush Tx buffer
    We are disabling IBS and flushing the Tx buffer before turning off the chip.

    This is due to IBS state machine is active when we turn off the chip.
    This will stop queuing IBS protocol bytes.

    * Bluetooth: hci_qca: Disable IBS state machine and flush Tx buffer

    5. btqca: inject command complete event during fw download

    Qualcomm latest chip will not send an command complete event
    for last packet of the fw dump sent, so here we are inject an command
    complete event.

    * Bluetooth: btqca: inject command complete event during fw download

    Changes in V5:
    * added serdev_device_wrute_flush before sending the power off pulse
    during shutdown.

    Changes in v4:
    * used serdev_device_write_buf() instead of serdev_device_write().
    * added new patch to stop logging of 0xfc00 timeout on console.

    Changes in v3:
    * moved IBS & qca_flush to different patch
    * updated comments in code fo Deassert RTS patch

    Balakrishna Godavarthi (5):
    Bluetooth: hci_qca: use wait_until_sent() for power pulses
    Bluetooth: hci_qca: Deassert RTS while baudrate change command
    Bluetooth: hci_qca: Fix frame reassembly errors for wcn3990
    Bluetooth: hci_qca: Disable IBS state machine and flush Tx buffer
    Bluetooth: btqca: inject command complete event during fw download

    drivers/bluetooth/btqca.c | 39 ++++++++++++++++++-
    drivers/bluetooth/btqca.h | 3 ++
    drivers/bluetooth/hci_qca.c | 78 +++++++++++++++++++++----------------
    3 files changed, 85 insertions(+), 35 deletions(-)

    --
    The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum,
    a Linux Foundation Collaborative Project

    \
     
     \ /
      Last update: 2018-12-20 15:48    [W:4.422 / U:0.008 seconds]
    ©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site