Received-SPF: pass (google.com: domain of linux-bluetooth+bounces-3995-linux.lists.archive=gmail.com@vger.kernel.org designates 2604:1380:45d1:ec00::1 as permitted sender) client-ip=2604:1380:45d1:ec00::1;
Message-ID: <bbfbe6a7-a689-4c8c-8adc-1b4488bdce7c@quicinc.com>
Date: Wed, 24 Apr 2024 21:51:33 +0800
Precedence: bulk
MIME-Version: 1.0
User-Agent: Mozilla Thunderbird
Subject: Re: [PATCH v6 1/2] Bluetooth: qca: Fix BT enable failure for QCA6390
To: Luiz Augusto von Dentz <luiz.dentz@gmail.com>,
        Wren Turkal
	<wt@penguintechs.org>
CC: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>,
        <luiz.von.dentz@intel.com>, <marcel@holtmann.org>,
        <linux-bluetooth@vger.kernel.org>, <bartosz.golaszewski@linaro.org>,
        <regressions@lists.linux.dev>, <kernel@quicinc.com>
References: <1713919602-5812-1-git-send-email-quic_zijuhu@quicinc.com>
 <1713919602-5812-2-git-send-email-quic_zijuhu@quicinc.com>
 <349b27a5-d2d3-46f1-b002-44f81e0cedef@linaro.org>
 <e8cd122d-e342-45c2-b078-a4ca2d8dcfff@quicinc.com>
 <dfe18768-f6da-4c60-880d-deeae3c3b04d@linaro.org>
 <8ae32009-5f5e-49a1-88a1-e330f0614f60@quicinc.com>
 <5e363318-c6e4-4874-8026-7940b434d583@linaro.org>
 <2020a858-c3d9-48a7-ad59-3691c6b98fb2@penguintechs.org>
 <CABBYNZJLCPaLTaFEfeTEn+2FpxLS8Z-W2kT1ry4jKB_W=XYNjA@mail.gmail.com>
Content-Language: en-US
From: quic_zijuhu <quic_zijuhu@quicinc.com>
In-Reply-To: <CABBYNZJLCPaLTaFEfeTEn+2FpxLS8Z-W2kT1ry4jKB_W=XYNjA@mail.gmail.com>
Content-Type: text/plain; charset="UTF-8"
Content-Transfer-Encoding: 8bit

On 4/24/2024 9:49 PM, Luiz Augusto von Dentz wrote:
> Hi Wren,
> 
> On Wed, Apr 24, 2024 at 1:04 AM Wren Turkal <wt@penguintechs.org> wrote:
>>
>> On 4/23/24 9:31 PM, Krzysztof Kozlowski wrote:
>>> On 24/04/2024 06:18, quic_zijuhu wrote:
>>>> On 4/24/2024 12:10 PM, Krzysztof Kozlowski wrote:
>>>>> On 24/04/2024 06:07, quic_zijuhu wrote:
>>>>>> On 4/24/2024 12:06 PM, Krzysztof Kozlowski wrote:
>>>>>>> On 24/04/2024 02:46, Zijun Hu wrote:
>>>>>>>> Commit 56d074d26c58 ("Bluetooth: hci_qca: don't use IS_ERR_OR_NULL()
>>>>>>>> with gpiod_get_optional()") will cause below serious regression issue:
>>>>>>>>
>>>>>>>> BT can't be enabled any more after below steps:
>>>>>>>> cold boot -> enable BT -> disable BT -> BT enable failure
>>>>>>>> if property enable-gpios is not configured within DT|ACPI for QCA6390.
>>>>>>>>
>>>>>>>> The commit wrongly changes flag @power_ctrl_enabled set logic for this
>>>>>>>> case as shown by its below code applet and causes this serious issue.
>>>>>>>> qcadev->bt_en = devm_gpiod_get_optional(&serdev->dev, "enable",
>>>>>>>>                                                 GPIOD_OUT_LOW);
>>>>>>>> - if (IS_ERR_OR_NULL(qcadev->bt_en)) {
>>>>>>>> + if (IS_ERR(qcadev->bt_en)) {
>>>>>>>>          dev_warn(&serdev->dev, "failed to acquire enable gpio\n");
>>>>>>>>  power_ctrl_enabled = false;
>>>>>>>>    }
>>>>>>>>
>>>>>>>> Fixed by reverting the mentioned commit for QCA6390.
>>>>>>>>
>>>>>>>> Fixes: 56d074d26c58 ("Bluetooth: hci_qca: don't use IS_ERR_OR_NULL() with gpiod_get_optional()")
>>>>>>>> Reported-by: Wren Turkal <wt@penguintechs.org>
>>>>>>>> Link: https://bugzilla.kernel.org/show_bug.cgi?id=218726
>>>>>>>> Link: https://lore.kernel.org/linux-bluetooth/ea20bb9b-6b60-47fc-ae42-5eed918ad7b4@quicinc.com/T/#m73d6a71d2f454bb03588c66f3ef7912274d37c6f
>>>>>>>> Signed-off-by: Zijun Hu <quic_zijuhu@quicinc.com>
>>>>>>>> Tested-by: Wren Turkal <wt@penguintechs.org>
>>>>>>>
>>>>>>> No, Bartosz' patch should go.
>>>>>>>
>>>>>> what is Bartosz' patch.
>>>>>
>>>>> Srsly? You were Cc'ed on it. How many upstream patches on upstream
>>>>> mailing lists do you receive that you lost track of them?
>>>>>
>>>> Bartosz' patch have basic serious mistook and logic error and have no
>>>> any help for QCA6390, and it is not suitable regarding DTS usage.
>>>
>>> Really? Why you did not respond with comments then? Considering how
>>> imprecise and vague you are in describing real issues, I have doubts in
>>> your judgment here as well.
>>
>> Please slow down here. Zijun's patch works and Bartosz's patch does not.
>> I don't think Zijun means any ill intent. I am replying to Bartosz's
>> patch right now.
> 
> Ok, that is great feedback, so I might be picking up the Zijun v7 set
> if we don't find any major problems with it.
> 
thank you, we will start to fix this issue for other product customer
have reported to us with different fix.
>>>
>>> Best regards,
>>> Krzysztof
>>>
>>
>> --
>> You're more amazing than you think!
> 
> 
>