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Message-ID: <e64b89b3-a8f5-44e7-ae7f-fc4298841f1c@penguintechs.org>
Date: Wed, 24 Apr 2024 06:26:36 -0700
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From: Wren Turkal <wt@penguintechs.org>
Subject: Re: [PATCH] Bluetooth: qca: set power_ctrl_enabled on NULL returned
 by gpiod_get_optional()
To: quic_zijuhu <quic_zijuhu@quicinc.com>, Bartosz Golaszewski <brgl@bgdev.pl>
Cc: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>,
 linux-bluetooth@vger.kernel.org, linux-kernel@vger.kernel.org,
 Marcel Holtmann <marcel@holtmann.org>,
 Luiz Augusto von Dentz <luiz.dentz@gmail.com>,
 Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
References: <20240422130036.31856-1-brgl@bgdev.pl>
 <99242a7c-53bf-4227-9623-7bc092f564b3@penguintechs.org>
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 <b982b73d-0540-409c-a6e2-0e03ecb11715@penguintechs.org>
 <0381f39c-38ba-4a2b-915c-f14c5f911eb9@penguintechs.org>
 <CAMRc=MfnEct7ThQhCA3AoY7hxq8j1mmFLNNkK17+RSvJxs67XQ@mail.gmail.com>
 <2371f538-ec53-4037-b171-c62bf4e06eb1@penguintechs.org>
 <CACMJSeunUaj0cxLaN4MpFmX5vTOx_vnWjBN4Y2FavdQoQxFRkg@mail.gmail.com>
 <4c33304a-5dbc-450a-b874-e04ba9e93150@penguintechs.org>
 <CAMRc=MeDQFHX9r-sHNxqkfpi=LkHoRSL7i6dWokB-J+J03rBEg@mail.gmail.com>
 <93e15ecf-252f-4789-a23b-a28280f6aa84@quicinc.com>
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On 4/24/24 6:12 AM, quic_zijuhu wrote:
> On 4/24/2024 8:27 PM, Bartosz Golaszewski wrote:
>> On Wed, Apr 24, 2024 at 2:24 PM Wren Turkal <wt@penguintechs.org> wrote:
>>>>>>
>>>>>> That's OK, we have the first part right. Let's now see if we can reuse
>>>>>> patch 2/2 from Zijun.
>>>>>
>>>>> I'm compiling it right now. Be back soon.
>>>>>
>>>>
>>>> Well I doubt it's correct as it removed Krzysztof's fix which looks
>>>> right. If I were to guess I'd say we need some mix of both.
>>>
>>> Patch 2/2 remove K's fix? I thought only 1/2 did that.
>>>
>>> To be specific, I have applied your patch and Zijun's 2/2 only.
>>>
>>
>> No, patch 1/2 from Zijun reverted my changes. Patch 2/2 removes
>> Krzysztof's changes and replaces them with a different if else. This
>> patch is a better alternative to Zijun's patch 1/2. For 2/2, I'll let
>> Krzysztof handle it.
>>
> do you really realize what do you talk about?
> do you really listen what do @Wren says?
> 
> he says that my patch 2/2 is right based on several verification results.

she, not he

> BTW, my 2/2 fix don't have anything about DTS usage.

I think the problem with your 2/2 patch is that it removes the 
conditional bailing if the device is shutdown or not open.

Maybe this patch instead?

diff --git a/drivers/bluetooth/hci_qca.c b/drivers/bluetooth/hci_qca.c
index 2f7ae38d85eb..fcac44ae7898 100644
--- a/drivers/bluetooth/hci_qca.c
+++ b/drivers/bluetooth/hci_qca.c
@@ -2456,6 +2456,10 @@ static void qca_serdev_shutdown(struct device *dev)
                     !test_bit(HCI_RUNNING, &hdev->flags))
                         return;

+               if (test_bit(HCI_QUIRK_NON_PERSISTENT_SETUP, 
&hdev->quirks) ||
+                   hci_dev_test_flag(hdev, HCI_SETUP))
+                       return;
+
                 serdev_device_write_flush(serdev);
                 ret = serdev_device_write_buf(serdev, ibs_wake_cmd,
                                               sizeof(ibs_wake_cmd));

> he maybe be a DTS expert but not BT from his present fix history for
> bluetooth system.


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