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From: Balakrishna Godavarthi <bgodavar@codeaurora.org>
To: Marcel Holtmann <marcel@holtmann.org>
Cc: Johan Hedberg <johan.hedberg@gmail.com>,
	Matthias Kaehlcke <mka@chromium.org>,
	open list <linux-kernel@vger.kernel.org>,
	linux-bluetooth@vger.kernel.org, hemantg@codeaurora.org,
	linux-arm-msm@vger.kernel.org
Subject: Re: [PATCH v1 3/4] Bluetooth: hci_qca: clear HCI_QUIRK_RESET_ON_CLOSE flag
Date: Tue, 06 Nov 2018 18:14:41 +0530	[thread overview]
Message-ID: <170e0419929840109d349b5df5e38364@codeaurora.org> (raw)
In-Reply-To: <462C4F58-E6E2-4B20-B074-72DDFA6D7364@holtmann.org>

Hi Marcel,

On 2018-11-06 18:03, Marcel Holtmann wrote:
> Hi Balakrishna,
> 
>> During hci down we are sending reset command to chip, which
>> is not required for wcn3990, as hdev->shutdown() will turn off the
>> regulators.
>> 
>> Signed-off-by: Balakrishna Godavarthi <bgodavar@codeaurora.org>
>> ---
>> drivers/bluetooth/hci_qca.c | 1 +
>> 1 file changed, 1 insertion(+)
>> 
>> diff --git a/drivers/bluetooth/hci_qca.c b/drivers/bluetooth/hci_qca.c
>> index 8301663f0004..97b57e0f4725 100644
>> --- a/drivers/bluetooth/hci_qca.c
>> +++ b/drivers/bluetooth/hci_qca.c
>> @@ -1190,6 +1190,7 @@ static int qca_setup(struct hci_uart *hu)
>> 		 */
>> 		set_bit(HCI_QUIRK_NON_PERSISTENT_SETUP, &hdev->quirks);
>> 		set_bit(HCI_QUIRK_USE_BDADDR_PROPERTY, &hdev->quirks);
>> +		clear_bit(HCI_QUIRK_RESET_ON_CLOSE, &hdev->quirks);
>> 		hu->hdev->shutdown = qca_power_off;
>> 		ret = qca_wcn3990_init(hu);
>> 		if (ret)
> 
> I am pretty certain that you didn’t want this quirk:
> 
>         /* When this quirk is set, the HCI Reset command is send when
> 
>          * closing the transport instead of when opening it.
> 
> This quirk is for Bluetooth 1.0b devices where the HCI_Reset behavior
> was not clear or for devices that actually misbehave with the initial
> HCI_Reset.
> 
> In addition, you commit message is totally misleading. That is not
> what is happening with this quirk.
> 
> Regards
> 
> Marcel

My intention was reset command is not required when we do an hci down.
this is because of hdev->shutdown will turn off the regulators.
It is like turning off the chip. sending reset command after turning off 
the chip is not required.

I understand the usage of the quirk, will update the commit text.


-- 
Regards
Balakrishna.

  reply	other threads:[~2018-11-06 12:44 UTC|newest]

Thread overview: 23+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-11-06 12:05 Bug fixes for Qualcomm BT chip wcn3990 Balakrishna Godavarthi
2018-11-06 12:05 ` [PATCH v1 1/4] Bluetooth: hci_qca: use wait_until_sent() for power pulses Balakrishna Godavarthi
2018-11-14  0:17   ` Matthias Kaehlcke
2018-11-14  6:29     ` Balakrishna Godavarthi
2018-11-14 15:27   ` Johan Hovold
2018-11-15 14:34     ` Balakrishna Godavarthi
2018-11-16  9:47       ` Johan Hovold
2018-11-06 12:05 ` [PATCH v1 2/4] Bluetooth: hci_qca: Pull RTS line high for baudrate change command Balakrishna Godavarthi
2018-11-14  1:55   ` Matthias Kaehlcke
2018-11-14  6:32     ` Balakrishna Godavarthi
2018-11-06 12:05 ` [PATCH v1 3/4] Bluetooth: hci_qca: clear HCI_QUIRK_RESET_ON_CLOSE flag Balakrishna Godavarthi
2018-11-06 12:33   ` Marcel Holtmann
2018-11-06 12:44     ` Balakrishna Godavarthi [this message]
2018-11-06 13:02       ` Marcel Holtmann
2018-11-06 13:14         ` Balakrishna Godavarthi
2018-11-06 13:36           ` Balakrishna Godavarthi
2018-11-14  7:48             ` Marcel Holtmann
2018-11-14 13:37               ` Balakrishna Godavarthi
2018-11-14  2:14           ` Matthias Kaehlcke
2018-11-14  6:50             ` Balakrishna Godavarthi
2018-11-06 12:05 ` [PATCH v1 4/4] Bluetooth: hci_qca: Fix frame reassembly errors for wcn3990 Balakrishna Godavarthi
2018-11-14 19:36   ` Matthias Kaehlcke
2018-11-15 11:40     ` Balakrishna Godavarthi

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