linux-kernel - Re: [PATCH v2 3/3] arm64: dts: qcom: sc8280xp: Add Huawei Matebook E Go (sc8280xp)

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Message-ID: <480eddca-97f1-4bc0-ab1f-22b14407e0d9@oss.qualcomm.com>
Date: Mon, 30 Dec 2024 15:54:48 +0100
From: Konrad Dybcio <konrad.dybcio@....qualcomm.com>
To: Pengyu Luo <mitltlatltl@...il.com>, konrad.dybcio@....qualcomm.com
Cc: andersson@...nel.org, chenxuecong2009@...look.com, conor+dt@...nel.org,
        devicetree@...r.kernel.org, gty0622@...il.com, johan+linaro@...nel.org,
        konradybcio@...nel.org, krzk+dt@...nel.org,
        linux-arm-msm@...r.kernel.org, linux-kernel@...r.kernel.org,
        robh@...nel.org
Subject: Re: [PATCH v2 3/3] arm64: dts: qcom: sc8280xp: Add Huawei Matebook E
 Go (sc8280xp)

On 23.12.2024 2:07 PM, Pengyu Luo wrote:
> On Mon, Dec 23, 2024 at 8:25 PM Konrad Dybcio <konrad.dybcio@....qualcomm.com> wrote:
>> On 21.12.2024 8:57 AM, Pengyu Luo wrote:
>>> Messing up, reply again to fix thread.
>>>
>>> On Sat, Dec 21, 2024 at 5:14 AM Konrad Dybcio <konrad.dybcio@....qualcomm.com> wrote:
>>>> On 20.12.2024 5:05 PM, Pengyu Luo wrote:
>>>>
>>>
>>> [...]
>>>
>>>>> +     chosen {
>>>>> +             #address-cells = <2>;
>>>>> +             #size-cells = <2>;
>>>>> +             ranges;
>>>>> +
>>>>> +             framebuffer0: framebuffer@...00000 {
>>>>> +                     compatible = "simple-framebuffer";
>>>>> +                     reg = <0x0 0xc6200000 0x0 0x02400000>;
>>>>> +                     width = <1600>;
>>>>> +                     height = <2560>;
>>>>> +                     stride = <(1600 * 4)>;
>>>>> +                     format = "a8r8g8b8";
>>>>> +             };
>>>>> +     };
>>>>
>>>> I still don't understand why efifb doesn't work for you.
>>>>
>>>
>>> In v1, you asked me
>>
>> Ahh sorry, I churn through a lot of emails and sometimes forget things.
>>
>>>
>>>> Very very weird. Are you booting with clk_ignore_unused pd_ignore_unused
>>>> in kernel cmdline?
>>>
>>> I said yes, as Johan suggested in here (see [1]). I am adding Johan.
>>>
>>>> Could you share your .config file?
>>>
>>> Here please, https://pastebin.com/UKew61ZC
>>
>> All the things one would expect for efifb to show up seem to be there.
>>
>> Maybe try earlycon=efifb video=efifb?
> 
> Not work, whether or not adding clk_ignore_unused pd_ignore_unused.

I am utterly confused then, maybe it's one of those devices where calling
exit boot services kills the display. 

Either way, let's not worry about it anymore

Konrad