linux-kernel - Re: [RFC PATCH v4 1/5] Bluetooth: Add mgmt op set_wake

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Message-Id: <417309A5-3C77-4EC3-BEA9-B0136C64625C@holtmann.org>
Date:   Sun, 8 Mar 2020 09:28:48 +0100
From:   Marcel Holtmann <marcel@...tmann.org>
To:     Abhishek Pandit-Subedi <abhishekpandit@...omium.org>
Cc:     Luiz Augusto von Dentz <luiz.dentz@...il.com>,
        Alain Michaud <alainm@...omium.org>,
        linux-bluetooth@...r.kernel.org,
        chromeos-bluetooth-upstreaming@...omium.org,
        "David S. Miller" <davem@...emloft.net>,
        Johan Hedberg <johan.hedberg@...il.com>,
        netdev@...r.kernel.org, linux-kernel@...r.kernel.org,
        Jakub Kicinski <kuba@...nel.org>
Subject: Re: [RFC PATCH v4 1/5] Bluetooth: Add mgmt op set_wake_capable

Hi Abhishek,

> When the system is suspended, only some connected Bluetooth devices
> cause user input that should wake the system (mostly HID devices). Add
> a list to keep track of devices that can wake the system and add
> a management API to let userspace tell the kernel whether a device is
> wake capable or not. For LE devices, the wakeable property is added to
> the connection parameter and can only be modified after calling
> add_device.
> 
> Signed-off-by: Abhishek Pandit-Subedi <abhishekpandit@...omium.org>
> ---
> 
> Changes in v4: None
> Changes in v3:
> * Added wakeable property to le_conn_param
> * Use wakeable list for BR/EDR and wakeable property for LE
> 
> Changes in v2: None
> 
> include/net/bluetooth/hci_core.h |  2 ++
> include/net/bluetooth/mgmt.h     |  7 +++++
> net/bluetooth/hci_core.c         |  1 +
> net/bluetooth/mgmt.c             | 51 ++++++++++++++++++++++++++++++++
> 4 files changed, 61 insertions(+)
> 
> diff --git a/include/net/bluetooth/hci_core.h b/include/net/bluetooth/hci_core.h
> index dcc0dc6e2624..9d9ada5bc9d4 100644
> --- a/include/net/bluetooth/hci_core.h
> +++ b/include/net/bluetooth/hci_core.h
> @@ -394,6 +394,7 @@ struct hci_dev {
> 	struct list_head	mgmt_pending;
> 	struct list_head	blacklist;
> 	struct list_head	whitelist;
> +	struct list_head	wakeable;
> 	struct list_head	uuids;
> 	struct list_head	link_keys;
> 	struct list_head	long_term_keys;
> @@ -575,6 +576,7 @@ struct hci_conn_params {
> 
> 	struct hci_conn *conn;
> 	bool explicit_connect;
> +	bool wakeable;
> };

I do not want to commit to the mgmt API just yet. So I would prefer that the two changes above go into the respective BR/EDR and LE patches to enable this feature. And that the mgmt command comes last in this series. Then I can start applying the initial patches and we just have to discuss on how we want to expose this for blueoothd to use.

Regards

Marcel