linux-kernel - [PATCH v3 0/4] Bluetooth: hci_bcm: Additional changes for BCM4354 support

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Message-Id: <20191112001949.136377-1-abhishekpandit@chromium.org>
Date:   Mon, 11 Nov 2019 16:19:45 -0800
From:   Abhishek Pandit-Subedi <abhishekpandit@...omium.org>
To:     Marcel Holtmann <marcel@...tmann.org>,
        Johan Hedberg <johan.hedberg@...il.com>,
        Rob Herring <robh+dt@...nel.org>
Cc:     linux-bluetooth@...r.kernel.org, dianders@...omium.org,
        Abhishek Pandit-Subedi <abhishekpandit@...omium.org>,
        devicetree@...r.kernel.org,
        "David S. Miller" <davem@...emloft.net>, netdev@...r.kernel.org,
        linux-kernel@...r.kernel.org, Ondrej Jirman <megous@...ous.com>,
        Mark Rutland <mark.rutland@....com>,
        Chen-Yu Tsai <wens@...e.org>
Subject: [PATCH v3 0/4] Bluetooth: hci_bcm: Additional changes for BCM4354 support


While adding support for the BCM4354, I discovered a few more things
that weren't working as they should have.

First, we disallow serdev from setting the baudrate on BCM4354. Serdev
sets the oper_speed first before calling hu->setup() in
hci_uart_setup(). On the BCM4354, this results in bcm_setup() failing
when the hci reset times out.

Next, we add support for setting the PCM parameters, which consists of
a pair of vendor specific opcodes to set the pcm parameters. The
documentation for these params are available in the brcm_patchram_plus
package (i.e. https://github.com/balena-os/brcm_patchram_plus). This is
necessary for PCM to work properly.

All changes were tested with rk3288-veyron-minnie.dts.


Changes in v3:
- Change disallow baudrate setting to return -EBUSY if called before
  ready. bcm_proto is no longer modified and is back to being const.
- Changed btbcm_set_pcm_params to btbcm_set_pcm_int_params
- Changed brcm,sco-routing to brcm,bt-sco-routing

Changes in v2:
- Use match data to disallow baudrate setting
- Parse pcm parameters by name instead of as a byte string
- Fix prefix for dt-bindings commit

Abhishek Pandit-Subedi (4):
  Bluetooth: hci_bcm: Disallow set_baudrate for BCM4354
  Bluetooth: btbcm: Support pcm configuration
  Bluetooth: hci_bcm: Support pcm params in dts
  dt-bindings: net: broadcom-bluetooth: Add pcm config

 .../bindings/net/broadcom-bluetooth.txt       | 11 +++
 drivers/bluetooth/btbcm.c                     | 18 +++++
 drivers/bluetooth/btbcm.h                     |  8 +++
 drivers/bluetooth/hci_bcm.c                   | 70 ++++++++++++++++++-
 4 files changed, 106 insertions(+), 1 deletion(-)

-- 
2.24.0.rc1.363.gb1bccd3e3d-goog