linux-kernel - Re: [PATCH v2 3/6] arm64: dts: qcom: r0q: add touchscreen support

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Message-ID: <73d30994-3ec3-41bc-9b07-638d4173dfe6@oss.qualcomm.com>
Date: Fri, 17 Oct 2025 10:20:43 +0200
From: Konrad Dybcio <konrad.dybcio@....qualcomm.com>
To: Ghatto <ghatto404@...il.com>
Cc: Krzysztof Kozlowski <krzk@...nel.org>,
        Bjorn Andersson <andersson@...nel.org>,
        Konrad Dybcio <konradybcio@...nel.org>, Rob Herring <robh@...nel.org>,
        Conor Dooley <conor+dt@...nel.org>, linux-arm-msm@...r.kernel.org,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 3/6] arm64: dts: qcom: r0q: add touchscreen support

On 10/16/25 10:08 PM, Ghatto wrote:
> On Thu, Oct 16, 2025 at 6:06 AM Konrad Dybcio
> <konrad.dybcio@....qualcomm.com> wrote:
>>
>>
>>
>> On 10/14/25 9:04 PM, Ghatto wrote:
>>> On Tue, Oct 14, 2025 at 11:18 AM Konrad Dybcio
>>> <konrad.dybcio@....qualcomm.com> wrote:
>>>>
>>>> On 10/14/25 5:10 PM, Ghatto wrote:
>>>>> On Tue, Oct 14, 2025 at 7:01 AM Konrad Dybcio
>>>>> <konrad.dybcio@....qualcomm.com> wrote:
>>>>>>
>>>>>> On 10/14/25 6:41 AM, Eric Gonçalves wrote:
>>>>>>> Enable the ST-Microelectronics FTS2BA61Y touchscreen. This patch
>>>>>>> depends on "Input: add support for the STM FTS2BA61Y touchscreen".
>>>>>>
>>>>>> The second sentence doesn't really make sense to be included in
>>>>>> the git log
>>>>> I'll keep it to the cover letter then
>>>>>>
>>>>>>> The device has an issue where SPI 8 (the bus which the touchscreen is
>>>>>>> connected to) is not working properly right now, so
>>>>>>> spi-gpio is used instead.
>>>>>>
>>>>>> Some Samsung devices used to use spi/i2c-gpio intentionally, also
>>>>>> on downstream. I'm assuming this isn't the case for r0q.
>>>>> It isn't, the device uses fts2ba61y on the spi8 bus - I hosted the
>>>>> DT at https://github.com/ghatt-o/ss_experiments/blob/main/r0q.dts if you
>>>>> want to take a look.
>>>>>>
>>>>>> Did you enable gpi_dma1, qupv3_id_1 before spi8, when testing
>>>>> The driver probes, but it fails to recognize the touchscreen device
>>>>
>>>> Could you post a complete dmesg and the precise DT diff you used?
>>> https://pastebin.com/QkYa8nMp (android dmesg) mainline dmesg doesn't have
>>
>> The link has expired 🙁
> https://pastebin.com/s4abJS9M shouldn't expire now!

And yet it did!

Feel free to just attach it to your message.. the list may bounce
it, but it will still reach the To/Cc recipients

Konrad