linux-kernel - Re: [PATCH 3/4] arm64: dts: qcom: sc8280xp: Add initial support for Ntmer TW220

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Message-ID: <f2f0f25b-40b0-452c-ad9e-01b84b32e163@oss.qualcomm.com>
Date: Wed, 30 Jul 2025 14:53:16 +0200
From: Konrad Dybcio <konrad.dybcio@....qualcomm.com>
To: Pengyu Luo <mitltlatltl@...il.com>
Cc: aliceryhl@...gle.com, andersson@...nel.org, conor+dt@...nel.org,
        devicetree@...r.kernel.org, ebiggers@...gle.com,
        ilpo.jarvinen@...ux.intel.com, joel.granados@...nel.org,
        konradybcio@...nel.org, krzk+dt@...nel.org, len.brown@...el.com,
        linux-arm-msm@...r.kernel.org, linux-kernel@...r.kernel.org,
        lossin@...nel.org, mingo@...nel.org, ojeda@...nel.org, robh@...nel.org,
        sfr@...b.auug.org.au, vanyang@...il.nju.edu.cn,
        viro@...iv.linux.org.uk
Subject: Re: [PATCH 3/4] arm64: dts: qcom: sc8280xp: Add initial support for
 Ntmer TW220

On 7/6/25 5:43 AM, Pengyu Luo wrote:
> On Sat, Jun 28, 2025 at 3:48 AM Konrad Dybcio <konrad.dybcio@....qualcomm.com> wrote:
>> On 6/17/25 11:29 AM, Pengyu Luo wrote:
>>> The Ntmer TW220 is a WOS tablet based on the Qualcomm SC8280XP platform,
>>> also known as the Robo&Kala 2-in-1 Laptop. Thanks to Hong for providing
>>> the unlocked device and early development work. This patch adds an
>>> initial device tree to enable basic functionality.
>>>
>>> Currently supported components include:
>>> - Bluetooth & Wi-Fi (board file regeneration required)
>>> - Battery charging (up to 15V/3A fixed PDO) and reporting via pmic-glink
>>> - Flash LEDs (front and rear)
>>> - Hall sensor (lid detection)
>>> - Keyboard (via Bluetooth or USB)
>>> - NVMe SSD
>>> - Power and volume keys
>>> - Simple-framebuffer
>>> - Sound (playback and capture; top-left DMIC only, top-right works only
>>>   on Windows)
>>> - Touchscreen and stylus (requires GPI DMA support [1] and stylus support [2])
>>> - USB Type-C ports
>>>
>>> The following components are currently non-functional:
>>> - Cameras (GalaxyCore GC5035; only sensor ID is detectable, no frames in libcamera;
>>>   partial driver can be found on LKML archives)
>>> - DSI display (blank screen with `dsi_err_worker: status=4`; primary DSI register
>>>   dump included below)
>>> - Stylus wireless charger (CPS4035)
>>> - UCSI over GLINK
>>>
>>> [1]: https://lore.kernel.org/linux-arm-msm/20250617090032.1487382-3-mitltlatltl@gmail.com
>>> [2]: https://lore.kernel.org/linux-input/20250605054855.403487-2-mitltlatltl@gmail.com
>>>
>>> Note: This series does **not** include any confidential material. Those
>>> who wish to run Linux on this device should contact Ntmer, as the
>>> bootloader is locked via secure boot.
>>>
>>> Co-developed-by: Hong Zhu <vanyang@...il.nju.edu.cn>
>>> Signed-off-by: Hong Zhu <vanyang@...il.nju.edu.cn>
>>> Signed-off-by: Pengyu Luo <mitltlatltl@...il.com>
>>>
>>> dsi_ctrl, reg = <0 0x0ae94000 0 0x400>;
>>> 0xae94000 20050001 000001f3 0000000b dddd1011
>>
>> This is not something we want in the commit log
>>
> 
> I will remove it. I need help, then I attached it, two of my sc8280xp
> devices require dsi to work. Reversing and guessing wasted a lot of
> time. I will appreciate it if qcom could support it.

There should be nothing interesting compared to what's on SM8350 when it
comes to DSI on 8280.

I would assume something's wrong with how your panel is being set up.

Konrad